JVC HR-S6700MS User manual

SERVICE MANUAL
No. 82807
June 2000
HR-S6700MS/S7700MS
CARACTERISTIQUES TECHNIQUES (The specifications shown pertain specifically to the model HR-S7700MS)
MAGNETOSCOPE
Printed in Japan
VICTOR COMPANY OF JAPAN, LIMITED
VIDEO DIVISION
S40894
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
HR-S6700MS/S7700MS
No. 82807
GÉNÉRALES
Alimentation : CA 220 V – 240 V `, 50 Hz/60 Hz
Consommation
Alimentation en marche : 25 W
Alimentation en veille : 4,7 W
Températures
Fonctionnement : 5°C à 40°C
Stockage : -20°C à 60°C
Position de fonctionnement
: Seulement horizontale
Dimensions (LxHxP) : 400 mm x 94 mm x 344 mm
Poids : 4,3 kg
Format : Standard S-VHS/VHS PAL/SECAM
Largeur de bande : 12,65 mm
Vitesse de bande
(VN) : 23,39 mm/s
(LD) : 11,70 mm/s
Durée maximale d’enregistrement
(VN) : 240 mn avec une cassette vidéo E-240
(LD) : 480 mn avec une cassette vidéo E-240
VIDÉO/AUDIO
Système de signal : Signaux couleur PAL/SECAM et signal
monochrome CCIR, 625 lignes/50 trames
Système d’enregistrement
: Balayage hélicoïdal DA4 (Double Azimuth)
Entrée : 0,5 Vcc à 2,0 Vcc, 75 ohms, asymétrique
Sortie : 1,0 Vcc, 75 ohms, asymétrique
Rapport signal/bruit : 45 dB
Résolution horizontale : 400 lignes (S-VHS-PAL)
250 lignes (VHS-PAL)
240 lignes (VHS-SECAM)
Gamme de fréquence : 70 Hz à 10.000 Hz (Audio normal)
20 Hz à 20.000 Hz (Audio Hi-Fi)
Entrée/sortie : Connecteurs péritélévision à 21 broches :
ENTREE/SORTIE x 1, ENTREE/DECODEUR x 1
Connecteurs RCA:
ENTREE VIDEO x 1,
ENTREE AUDIO x 1,
SORTIE AUDIO x 1
Connecteurs S-Vidéo:
ENTREE x 1, SORTIE x 1
SYNTONISEUR
Système de syntonisation : Syntoniseur à synthèse de fréquence
Capacité de canaux TV : 99 positions (+ position AUX)
Canaux couverts
MINUTERIE
Référence de l’horloge : Par quartz
Capacité de programmation : Minuterie sur 1 an/8 programmes
Durée de soutien mémoire : 60 mn
ACCESSOIRES
Accessoires fournis : Câble RF,
Câble péritélévision à 21 broches,
Adaptateur antenne,
Contrôleur satellite RM-SD1,
Boîtier de télécommande à infrarouge,
Pile “R6” x 2,
Etiquettes S-VHS ET
ATTENTION:
Ce magnétoscope contient des microprocesseurs. Des bruits
électroniques externes ou des interférences peuvent causer un mauvais
fonctionnement. Dans de tels cas, couper l’alimentation et débrancher
le cordon d’alimentation. Puis le rebrancher et remettre l’alimentation.
Sortir la cassette. Après contrôle de la cassette, faire fonctionner
l’appareil comme d’ordinaire.
Les caractéristiques techniques sont pour le mode VN àmoins
d’indication contraire.
Présentation et caractéristiques modifiables sans préavis.
Gamme
SECAM L PAL B/G
Fréquence Canaux Fréquence Canaux
VHF
49 MHz –65 MHz 2 –4 47 MHz –89 MHz
E2 –E4
(LOW) X, Y, Z
E5 –E12
VHF 104 MHz 5 –10 104 MHz S1 –S20
(HIGH) –300 MHz CATV –300 MHz M1 –M10
U1 –U10
Hyper 300 MHz –470 MHz CATV 3 02 MHz –470 MHz S21 –S41
UHF 470 MHz –862 MHz 21 –69 470 MHz –862 MHz E21 –E69

Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1 DISASSEMBLY FLOW CHART ............................................................ 1-1
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY ...................... 1-1
1.3 DISASSEMBLY/ASSEMBLY METHOD ................................................ 1-1
1.4 SERVICE POSITION ............................................................................ 1-4
1.4.1 How to take out the Mechanism and Main board assemblies ......... 1-4
1.4.2 Precautions for cassette loading in the "SERVICE POSITION" ...... 1-5
1.4.3 Cassette loading and ejection methods in the
“SERVICE POSITION”(See Fig. 1-4-3). .......................................... 1-5
1.5 MECHANISM SERVICE MODE ........................................................... 1-5
1.5.1 How to set the "MECHANISM SERVICE MODE" ............................ 1-5
1.6 EMERGENCY DISPLAY FUNCTION ................................................... 1-6
1.6.1 Displaying the emergency information ............................................ 1-6
1.6.2 Clearing the emergency history ....................................................... 1-6
1.6.3 Emergency content description ....................................................... 1-7
1.6.4 Emergency detail information 1 ....................................................... 1-8
1.6.5 Emergency detail information 2 ....................................................... 1-9
1.7 SYSCON CIRCUIT ............................................................................. 1-10
1.7.1 Syscon CPU pin function (IC3001) 1/2 .......................................... 1-10
1.7.2 Syscon CPU pin function (IC3001) 2/2 .......................................... 1-11
2. MECHANISM ADJUSTMENT
2.1 BEFORE STARTING REPAIR AND ADJUSTMENT ............................. 2-1
2.1.1 Precautions ...................................................................................... 2-1
2.1.2 Checking for Proper Mechanical Operations ................................... 2-1
2.1.3 Manually Removing the Cassette Tape ........................................... 2-1
2.1.4 Jigs and Tools Required for Adjustment .......................................... 2-2
2.1.5 Maintenance and Inspection ............................................................ 2-3
2.2 REPLACEMENT OF MAJOR PARTS .................................................. 2-6
2.2.1
Before Starting Disassembling (Phase matching between mechanical parts) 2-6
2.2.2 How to Set the Mechanism Assembling Mode ................................ 2-6
2.2.3 Cassette Holder Assembly .............................................................. 2-6
2.2.4 Pinch Roller Arm Assembly ............................................................. 2-8
2.2.5 Guide Arm Assembly and Press Lever Assembly ............................ 2-8
2.2.6 Audio Control Head ......................................................................... 2-8
2.2.7 Loading Motor .................................................................................. 2-8
2.2.8 Capstan Motor ................................................................................. 2-9
2.2.9 Pole Base Assembly (supply or take-up side) ................................. 2-9
2.2.10 Rotary Encoder ........................................................................... 2-10
2.2.11 Clutch Unit .................................................................................. 2-10
2.2.12
Change Lever Assembly, Direct Gear, Clutch Gear and Coupling Gear 2-10
2.2.13 Link Lever ................................................................................... 2-11
2.2.14 Cassette Gear, Control Cam and Worm Gear ............................ 2-11
2.2.15 Control Plate ............................................................................... 2-11
2.2.16
Loading Arm Gear (supply or take-up side) and Loading Arm Gear Shaft 2-12
2.2.17 Take-up Lever, Take-up Head and Control Plate Guide ............. 2-13
2.2.18 Capstan Brake Assembly ........................................................... 2-13
2.2.19 Sub Brake Assembly (take-up side) ........................................... 2-13
2.2.20 Main Brake Assembly (take-up side), Reel Disk (take-up side)
and Main Brake Assembly (supply side) ..................................... 2-13
2.2.21
Tension Brake Assembly, Reel Disk (supply side) and Tension Arm Assembly 2-14
2.2.22 Idler Lever, Idler Arm Assembly .................................................. 2-14
2.2.23 Stator Assembly .......................................................................... 2-14
2.2.24 Rotor Assembly .......................................................................... 2-14
2.2.25 Upper Drum Assembly ................................................................ 2-15
2.3 COMPATIBILITY ADJUSTMENT ........................................................ 2-16
2.3.1 Checking/Adjustment of FM Waveform Linearity ........................... 2-16
2.3.2
Checking/Adjustment of the Height and Tilt of the Audio Control Head 2-17
2.3.3 Checking/Adjustment of the Audio Control Head Phase (X-Value) 2-17
2.3.4 Checking/Adjustment of the Standard Tracking Preset ................. 2-18
2.3.5 Checking/Adjustment of the Tension Pole Position ....................... 2-18
3. ELECTRICAL ADJUSTMENT
3.1 PRECAUTION ...................................................................................... 3-1
3.1.1 Required test equipments ................................................................ 3-1
3.1.2 Required adjustment tools ............................................................... 3-1
3.1.3 Color (colour) bar signal,Color (colour) bar pattern ......................... 3-1
3.1.4 Switch settings and standard precautions ....................................... 3-1
3.1.5 EVR Adjustment .............................................................................. 3-1
3.2 SERVO CIRCUIT .................................................................................. 3-2
3.2.1 Switching point ................................................................................ 3-2
3.2.2 Slow tracking preset ........................................................................ 3-2
3.3 VIDEO CIRCUIT ................................................................................... 3-2
3.3.1 D/A level .......................................................................................... 3-2
TABLE OF CONTENTS
Section Title Page Section Title Page
3.3.2 EE Y level ........................................................................................ 3-3
3.3.3 PB Y level (S-VHS / VHS) ............................................................... 3-3
3.3.4 REC color (colour) level ................................................................... 3-3
3.3.5 Video EQ (Frequency response) ..................................................... 3-4
3.3.6 AUTO PICTURE initial setting ......................................................... 3-4
3.4 AUDIO CIRCUIT ................................................................................... 3-5
3.4.1 Audio REC FM ................................................................................. 3-5
3.5 PAL/SECAM CONVERTER CIRCUIT .................................................. 3-5
3.5.1 fH VCO ............................................................................................ 3-5
3.5.2 DEMOD Fo ...................................................................................... 3-5
3.5.3 Colour difference level ..................................................................... 3-6
3.5.4 PAL burst position ............................................................................ 3-6
4. CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM .......................................................... 4-1
CIRCUIT BOARD NOTES ........................................................................... 4-2
4.1 BOARD INTERCONNECTIONS .......................................................... 4-3
4.2
VIDEO/AUDIO AND AUDIO ERASE SCHEMATIC DIAGRAMS ..................... 4-5
4.3 SYSTEM CONTROL SCHEMATIC DIAGRAM .................................... 4-7
4.4 SWITCHING REGULATOR SCHEMATIC DIAGRAM ......................... 4-9
4.5 TUNER SCHEMATIC DIAGRAM ....................................................... 4-11
4.6 CONNECTION SCHEMATIC DIAGRAM ........................................... 4-13
4.7 2D DIGITAL SCHEMATIC DIAGRAM [HR-S6700MS] ....................... 4-15
4.8 3D DIGITAL/2M SCHEMATIC DIAGRAM [HR-S7700MS] ................. 4-17
4.9 TERMINAL SCHEMATIC DIAGRAM ................................................. 4-19
4.10 DEMODULATOR SCHEMATIC DIAGRAM ..................................... 4-21
4.11 S-SUB SCHEMATIC DIAGRAM ...................................................... 4-23
4.12 SW/DISPLAY, REC SAFETY, JACK AND SHUTTLE/PLAY
SCHEMATIC DIAGRAMS [HR-S6700MS] ....................................... 4-25
4.13 SW/DISPLAY, REC SAFETY, JACK AND JOG SCHEMATIC
DIAGRAMS [HR-S7700MS] ............................................................. 4-27
4.14 P/S CONVERTER SCHEMATIC DIAGRAM .................................... 4-29
4.15 SECAM SCHEMATIC DIAGRAM ..................................................... 4-31
4.16 MAIN, AUDIO ERASE, A/C HEAD AND LOADING MOTOR
CIRCUIT BOARDS ........................................................................... 4-35
4.17 2D DIGITAL CIRCUIT BOARD [HR-S6700MS] ............................... 4-37
4.18 3D DIGITAL/2M CIRCUIT BOARD [HR-S7700MS] ......................... 4-37
4.19 TERMINAL CIRCUIT BOARD .......................................................... 4-38
4.20 DEMODULATOR CIRCUIT BOARD ................................................ 4-39
4.21 S-SUB CIRCUIT BOARD ................................................................. 4-39
4.22 SW/DISPLAY, REC SAFETY, JACK AND SHUTTLE/PLAY
CIRCUIT BOARDS [HR-S6700MS] ................................................. 4-41
4.23
SW/DISPLAY, REC SAFETY, JACK AND JOG CIRCUIT BOARDS [HR-S7700MS] 4-43
4.24 P/S CONVERTER CIRCUIT BOARD .............................................. 4-45
4.25 SECAM CIRCUIT BOARD ............................................................... 4-47
4.26 REMOTE CONTROL SCHEMATIC DIAGRAM ............................... 4-48
4.27
FDP GRID ASSIGNMENT AND ANODE CONNECTION[HR-S6700MS] . 4-49
4.28
FDP GRID ASSIGNMENT AND ANODE CONNECTION[HR-S7700MS] . 4-50
4.29 VOLTAGE CHARTS ......................................................................... 4-51
4.30 SYSTEM CONTROL BLOCK DIAGRAM ......................................... 4-57
4.31 VIDEO BLOCK DIAGRAM ............................................................... 4-59
4.32 AUDIO BLOCK DIAGRAM ............................................................... 4-63
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ............................... 5-1
5.2 CABINET AND CHASSIS ASSEMBLY <M2> ...................................... 5-2
5.3 MECHANISM ASSEMBLY <M4> ......................................................... 5-4
5.4 ELECTRICAL PARTS LIST .................................................................. 5-6
MAIN BOARD ASSEMBLY <03> .............................................................. 5-6
2D DIGITAL BOARD ASSEMBLY(S6700MS)<05> ................................. 5-12
3D DIGITAL/2M BOARD ASSEMBLY(S7700MS) <05> .......................... 5-13
TERMINAL BOARD ASSEMBLY <06> ................................................... 5-14
AUDIO CONTROL HEAD BOARD ASSEMBLY <12> ............................ 5-16
DEMOD BOARD ASSEMBLY <14> ........................................................ 5-16
S-SUB BOARD ASSEMBLY <15> .......................................................... 5-17
DISPLAY BOARD ASSEMBLY(S6700MS) <28> .................................... 5-17
DISPLAY BOARD ASSEMBLY(S7700MS) <28> .................................... 5-18
REC SAFETY BOARD ASSEMBLY(S6700MS) <32> ............................ 5-19
REC SAFETY BOARD ASSEMBLY(S7700MS) <32> ............................ 5-19
S JACK BOARD ASSEMBLY(S7700MS) <36> ...................................... 5-19
S JACK BOARD ASSEMBLY(S6700MS) <36> ...................................... 5-19
JOG BOARD ASSEMBLY(S7700MS) <37> ............................................ 5-19
AUDIO ERASE BOARD ASSEMBLY <46> ............................................. 5-19
LOADING MOTOR BOARD ASSEMBLY <55> ....................................... 5-19
SHUTTLE/PLAY BOARD ASSEMBLY(S6700MS) <85> ......................... 5-19
P/S CONVERTER BOARD ASSEMBLY <87> ........................................ 5-20
SECAM BOARD ASSEMBLY <88> ........................................................ 5-22
HR-S6700MS HR-S7700MS
JOG/SHUTTLE DIAL SHUTTLE PLAY JOG/SHUTTLE
FLYING ERASE HEAD NOT USED USED
INSERT EDIT NOT USED USED
DIGITAL 3R NOT USED USED
TBC/3D-MEMORY NOT USED USED/2M
AUDIO DUBBING NOT USED USED
HiFi LEVEL METER NOT USED USED
RE-TAKE (CM PAUSE) NOT USED USED
R.PAUSE NOT USED USED
The following table lists the differing points between Models (HR-S6700MS and HR-S7700MS) in this series.

Important Safety Precautions
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the
countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions
when a set is being serviced.
Fig.1
1. Locations requiring special caution are denoted by labels and in-
scriptions on the cabinet, chassis and certain parts of the product.
When performing service, be sure to read and comply with these
and other cautionary notices appearing in the operation and serv-
ice manuals.
2. Parts identified by the !symbol and shaded ( ) parts are
critical for safety.
Replace only with specified part numbers.
Note: Parts in this category also include those specified to com-
ply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.
3. Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
4. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
5. Use specified insulating materials for hazardous live parts. Note
especially:
1) Insulation Tape 3) Spacers 5) Barrier
2) PVC tubing 4) Insulation sheets for transistors
6. When replacing AC primary side components (transformers, power
cords, noise blocking capacitors, etc.) wrap ends of wires securely
about the terminals before soldering.
Power cord
Fig.2
10. Also check areas surrounding repaired locations.
11. Products using cathode ray tubes (CRTs)
In regard to such products, the cathode ray tubes themselves, the
high voltage circuits, and related circuits are specified for compli-
ance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath-
ode ray tubes and other parts with only the specified parts. Under
no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value and
cause X-ray emission from the cathode ray tube.
12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power trans-
former primary lead wires are performed using crimp type connec-
tors, if replacing the connectors is unavoidable, in order to prevent
safety hazards, perform carefully and precisely according to the
following steps.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type which
will not damage insulated parts.
3) Replacement procedure
(1) Remove the old connector by cutting the wires at a point
close to the connector.
Important : Do not reuse a connector (discard it).
Fig.7
cut close to connector
Fig.3
(2) Strip about 15 mm of the insulation from the ends of the
wires. If the wires are stranded, twist the strands to avoid
frayed conductors.
15 mm
Fig.4
(3) Align the lengths of the wires to be connected. Insert the
wires fully into the connector.
Connector
Metal sleeve
Fig.5
(4) As shown in Fig.6, use the crimping tool to crimp the metal
sleeve at the center position. Be sure to crimp fully to the
complete closure of the tool.
I
•Precautions during Servicing
7. Observe that wires do not contact heat producing parts (heatsinks,
oxide metal film resistors, fusible resistors, etc.)
8. Check that replaced wires do not contact sharp edged or pointed
parts.
9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.
1.25
2.0
5.5
Crimping tool
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free Crimped at approx. center
of metal sleeve
Conductors extended
Wire insulation recessed
more than 4 mm
S40888-01

•Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned
to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety
standards.
1. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and exter-
nally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
2. Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed acces-
sible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals,
microphone jacks, earphone jacks, etc.). See table 1 below.
3. Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d’) be-
tween soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
4. Leakage current test
Confirm specified or lower leakage current between earth ground/power cord plug prongs and
externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and
output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessible
parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following
table 2.
5. Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in, Video out,
Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
Fig. 10
Fig. 9
Fig. 8
Table 1 Specifications for each region
Table 2 Leakage current specifications for each region
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
II
S40888-01
ab
c
V
A
Externally
exposed
accessible part
Z

1-1
SECTION 1
DISASSEMBLY
1.3 DISASSEMBLY/ASSEMBLY METHOD1.1 DISASSEMBLY FLOW CHART
This flowchart lists the disassembling steps for the cabinet
parts and P.C. boards in order to gain access to item(s) to
be serviced. When reassembling, perform the step(s) in re-
verse order. Bend, route and dress the flat cables as they
were originally laid.
Step/
Loc No.
Part Name Fig.
No. Point Note
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY
Note:
• The bracketed ( ) WR of the connector symbol are as-
signed nos. in priority order and do not correspond to
those on the spare parts list.
(5) Adjustment information for installation
<Note 2>
• When attaching the Bottom cover, make sure that the Earth
plate of the Bottom cover is passed through the hole of the
Bottom chassis and then touches the GND (Ground) on the
Main board assembly.
<Note 3a>
• Be careful not to damage the connector and wire etc. during
connection and disconnection.
When connecting the wire to the connector, be careful with the
wire direction.
<Note 3b>
• When reattaching the Front panel assembly, make sure that
the door opener aof the Cassette holder assembly is lowered
in position prior to the reinstallation.
<Note 5a>
• When it is required to remove the screws (S5a) retaining the
Mechanism assembly, please refer to the “Procedures for Low-
ering the Cassette holder assembly”(See on pages 1-2).
• When removing the Mechanism assembly only, unhook the two
spacers connecting it with the Main board assembly with pliers
from the back side of the Main board assembly first, and then
remove the Mechanism assembly.
• When reattaching the Mechanism assembly to the Main board
assembly, take care not to damage the sensors on the Main
board assembly (D3001: LED, Q3002: Start sensor, Q3003:
End sensor, S3002 : S cassette switch).
<Note 5b>
• The wire (WR5) has excess length that may be loose, as it is
quite long. After inserting the wire and connectors, the loose
portion of the wire should be taken up and accommodated be-
tween the A/C head base and the main deck.
<Note 6>
• The REC safety board assembly is attached to the SW/Display
board assembly. It is therefore necessary to remove the REC
safety board assembly before removing the SW/Display board
assembly.
Top cover, Bracket
Bottom cover
Front panel assembly
Drum assembly
Mechanism assembly
SW/Display board assembly
P/S Converter board assembly
Main board assembly
1
2
3
4
5
6
7
8
------------------
1Top cover, D1 4(S1a), (S1b)
Bracket 2(S1c)
2Bottom cover D2 4(L2a),3(L2b),(S2a), <Note 2>
2(S2b)
Earth plate
3Front panel assembly D3
7(L3),CN901(WR3a), <Note 3a>
CN7002(WR3b) <Note 3b>
[HR-S6700MS]
CN3012(WR3b)
[HR-S7700MS]
2(S3),Jack board assy
4Drum assembly D4
3(S4),CON1(WR4a), <Note 3a>
CN1(WR4b)
(Inertia plate) 4(L4a)
(Roller arm assy) (P4), (L4b)
5Mechanism assembly D5 2(S5a),(S5b),(S5c),
<Note 3a>
2(L5), CN1(WR5) <Note 5a>
<Note 5b>
6SW/Display board D6 CN7001(WR6a),
<Note 3a>
assembly CN7191(WR6b), <Note 6>
(L6a),
REC safety board assy,
2(L6b), 5(L6c)
7P/S Converter board D7 2(S7),
<Note 3a>
assembly CN3501(WR7a),
CN3502(WR7b)
8Main board assembly D8 2(S8), (L8)
------------------
------------------
------------------
------------------
(1) (2) (3) (4) (5)
Step/
Loc No.
Part Name Fig.
No. Point Note
1 Top cover, D1 4(S1a),(S1b),3(L1a), <Note 1>
2(SD1a),(P1a),
CN1(WR1a),
Bracket 2(S1c)
<Example>
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse order.
These numbers are also used as the identification (location) No.
of parts Figures.
(2) Part name to be removed or installed.
(3) Fig. No. showing procedure or part location.
(4) Identification of part to be removed, unhooked, unlocked,
released, unplugged, unclamped or unsoldered.
P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder,
CN**(WR**)= Remove the wire (WR**) from the connector
(CN**).

1-2
Fig. D1 Fig. D3
Fig. D2
Fig. 1
Fig. 2
Fig. 3
1
(S1a)
(S1a)
(S1a)
(S1b)
1
(S1c)
(S1c)
Bracket
Top cover
Procedures for Lowering the Cassette holder assembly
2(S2a)
Earth plate
<Note 2>
(S2b)
(L2a)
(L2a)
(L2b)
(L3)
(L3) CN901
WR3a
Foil side
<Note 3a>
3
(L3)
a <Note 3b>
Jog shuttle
WR3b
Foil side
<Note 3a>
CN3012
[HR-S7700MS]
CN7002
[HR-S6700MS]
CN7192
Front panel
back side
Jack board
assembly
WR3a
(S3)
Turn the loading motor pulley in the direction as indicated by
Fig.2. As both Åand ılevers are lodged twice, push the
levers in the direction as indicated by Fig.3 to release them.
When pushing the levers, do it in the order of Å, ı, ı, Å.
When the holder has been lowered, turn the pulley until the
cassette holder is securely in place without allowing any up/
down movement.
Procedures for Lowering the Cassette holder assembly
As the mechanism of this unit is integrated with the Housing
assembly, the holder must be lowered and the two screws un-
screwed when removing the Mechanism assembly.

1-3
Fig. D4
Fig. D6
Fig. D5
Note: When installing the Drum assembly, secure the
screws (S4) in the order of a, b , c.
Fig. D7
(S4)
4
CN1
ac
CON1
b
WR4a
Foil side
<Note 3a>
WR4b
Foil side
<Note 3a>
(S4)
(L4a)
(L4b)
(P4)
Roller arm
assy
Inertia plate
Cleaner assy
Not use
(L4c)
(S5b)
(S5c)
(S5a)
<Note 5a>
5
(L5)
Spacer
<Note 5a>
(L5)
Spacer
<Note 5a>
Q3003
End sensor
<Note 5a>
Q3002
Start sensor
<Note 5a>
D3001
LED
<Note 5a> S3002
S cassette switch
<Note 5a>
WR5
Foil side
<Note3a>
<Note 5b>
A/C head base
WR5
CN1
a
b
Note:
When installing the
Mechanism assembly,
secure the screws (S5a) in
the order of a , b .
(L6c)
CN7001
(L6b)
6
CN7191
(L6a)
REC Safety
board assembly
<Note 6>
WR6b
Foil side
<Note 3a>
WR6a
Supporting
tape side
<Note 3a>
7
WR7a WR7b
Foil side
<Note 3a>
(S7)
(S7)
CN3501
CN3502

1-4
1.4 SERVICE POSITION
In order to facilitate diagnosis and the repair of the Mecha-
nism assembly, this unit is constructed so as to allow the
Mechanism and Main board assemblies to be removed to-
gether from the Bottom chassis assembly.
1.4.1 How to take out the Mechanism and Main board
assemblies
(1) Remove the Top cover, Bracket, Front panel assembly
and Jack board assembly. (Refer to 1.3 DISASSEMBLY/
ASSEMBLY METHOD. )
(2) Lower the cassette holder, and make the preparations re-
quired in order to remove the screws from the Mecha-
nism assembly. (Refer to the “Procedures for Lowering
the Cassette holder assembly”on pages 1-2 of 1.3 DIS-
ASSEMBLY/ASSEMBLY METHOD.)
(3) Take out 2 screws Å, 1 screw ıand 1 screw Ças
shown in Fig. 1-4-1.
(4) Remove the flat wires from CN3011 and CN902 on the
Main board assembly.
(5) Take out 2 screws Îand 1 screw ´as shown in Fig. 1-
4-1.
(6) Take out 2 screws Ïas shown in Fig. 1-4-1. Then re-
move the P/S Converter board assembly. (Refer to 1.3
DISASSEMBLY/ASSEMBLY METHOD.)
(7) Remove the hook ˝while holding the edge of the Main
board assembly, and remove the Main board and Mecha-
nism assemblies together. At this stage be careful of the
power cord and prongs of the jacks on the back side. (Re-
fer to Fig. 1-4-2.)
(8) Remove the SW/Display board assembly and REC safety
board assembly. (Refer to page 1-3 of 1.3 DISASSEM-
BLY/ASSEMBLY METHOD. Take care not to pull the flat
wires (Fig. D7) from CN7001 and CN7191.)
G
Fig. D8
(L8)
8
(S8)
D
ED
BC
AF
F
Fig. 1-4-1
Fig. 1-4-2
CN3011
REC safety board
Assembly SW/Disply board Assembly
Main board
Assembly
Jack board
Assembly
CN902
CN6102
CN901
CN7192
CN3502
CN3501
P/S Converter board Assembly
CN3012
To Jog
Fig. 1-4-3
(9) Place the SW/Display board assembly, REC safety board
assembly, Jack board assembly and P/S Converter board
assembly on the front side and left side of the Mecha-
nism and Main board assemblies which was removed at
the step (7), then connect the flat wires into CN3011,
CN901 and CN902 of the Main board assembly, CN3501
and CN3502 of the P/S Converter board assembly. (Re-
fer to Fig. 1-4-3.)
(10) Connect the power cord to the wall socket, and lift the
cassette holder.
(Before turning on the power make sure that there is noth-
ing which may produce a short circuit, such as faulty sol-
dering.)

1-5
1.4.2 Precautions for cassette loading in the "SERVICE
POSITION"
The REC safety board assembly detects cassette loading as
well as cassette tabs. Therefore, after the assembly has been
removed in the "SERVICE POSITION", it is required to set
the switch manually on the REC safety board assembly when
a cassette is loaded.
1.4.3 Cassette loading and ejection methods in the
“SERVICE POSITION”(See Fig. 1-4-3).
(1) Insert a cassette halfway in the Cassette holder assembly.
(2) Set the switch on the REC safety board assembly to ON
(by pressing the switch).
(3) As soon as the cassette starts to be loaded, set the switch
on the REC safety board assembly to OFF (by releasing
the switch).
(4) Now the desired operation (recording, playback, fast for-
ward, rewind, etc.) is possible in this status (the status
shown in Fig.1-4-3).
Notes:
•When performing diagnostics of the tape playback or
the recording condition in the "SERVICE POSITION",
enter the desired mode before turning the set upside
down, and do not change the mode when performing
diagnostics while the set is placed upside down. If you
want to switch the mode, turn the set to the normal po-
sition (the status shown in Fig.1-4-3).
1.5 MECHANISM SERVICE MODE
This model has a unique function to enter the mechanism
into every operation mode without loading of any cassette
tape. This function is called the “MECHANISM SERVICE
MODE”.
1.5.1 How to set the "MECHANISM SERVICE MODE"
(1) Disconnect VCR from AC.
(2) Connect TPGND and TP7001 (TEST) on the SW/Display
board assembly with a jump wire.
(3) Connect VCR to AC.
(4) Press the POWER button.
(5) With lock levers Åı on the left and right of the Cassette
holder assembly pulled toward the front, slide the holder
in the same direction as the cassette insertion direction.
(For the positions of lock levers Åı, refer to the “Pro-
cedures for Lowering the Cassette holder assembly”on
pages 1-2 of 1.3 DISASSEMBLY/ASSEMBLY METHOD.)
(6) The cassette holder lowers and, when the loading has
completed, the mechanism enters the desired mode.
Fig. 1-5-1
Jack board assembly
CP4001
CP5302
CN513 Main board assembly
2D Digital [HR-S6700MS] or
3D Digital/2M [HR-S7700MS] board assembly
S-Sub board assembly
DEMOD board assembly
P/S Converter board
assembly
Audio erase
board assembly
Terminal board assembly
TP111
D.FF
TP4001
CTL.P
TP2253
A.FM TP106
PB.FM
CN902
CN901
CN6102
CN7192
CN3502
CN3501
CN7191 CN7001
CN7002
[HR-S6700MS]
To Shuttle play [HR-S6700MS]
REC safety board
assembly
SW/Display board assembly
CP5301
VR1401
D/A LEVEL ADJ
[HR-S7700MS]
CN3011
CN3012 [HR-S7700MS]
To Jog [HR-S7700MS]
TPGND
TP7001 (TEST)
Note:
•When carrying out diagnosis and repair of the Main
board assembly in the service position, be sure to
ground both the Main board and the Mechanism as-
semblies.
If they are improperly grounded, there may be noise
on the playback picture or the FDP counter display may
move even when the mechanism is kept in an inopera-
tive status.
•In the "SERVICE POSITION", the cassette tabs cannot
be detected and recording becomes possible even with
a cassette with broken tabs such as the alignment tape.
Be very careful not to erase important tapes.
(5) The switch on the REC safety board assembly does not
have to be operated when ejecting a tape. But be sure
to turn the set to the normal position before ejecting the
tape.

1-6
1.6 EMERGENCY DISPLAY FUNCTION
This unit has a function for storing the history of the past two
emergencies (EMG) and displaying them on each FDP. With the
status of the VCR and mechanism at the moment an emergency
occurred can also be confirmed.
Notes:
•The emergency detail display
1 2
show the information
on the latest emergency.
It becomes “––: ––: ––” when there is no latest emer-
gency record.
•When using the Jig RCU, set its custom code to match
the custom code of the VCR.
FDP display switching
FDP display
0 : 00 : 00
Emergency detail display
2
Emergency detail display
1
Emergency content display
(E:Latest:Previous)
Normal display
*
1:
*
2 : 34
E:
**
:
**
*
5:
*
6 :
*7
Fig. 1-6-1 Jig RCU [PTU94023B]
Note:
•For the emergency content, see “1.6.3 Emergency con-
tent description”.
(2) Transmit the code “59”from the Jig RCU again.
The FDP shows the emergency detail information 1in the
form of “*1 : *2 : 34”.
*1: Deck operation mode at the moment of emergency
*2: Mechanism operation mode at the moment of emer-
gency
3–: Mechanism sensor information at the moment of
emergency
–4:Mechanism mode position at the moment of emer-
gency
Note:
•For the emergency detail information 1 , see “1.6.4 Emer-
gency detail information
1 ”.
(3) Transmit the code “59”from the Jig RCU once again.
The FDP shows the emergency detail information 2in the
form of “*5: *6: *7”.
*5: Type of the cassette tape in use 1.
*6: Winding position of the cassette tape in use
*7: Type of the cassette tape in use 2(Winding area)
Note:
•For the emergency detail information
2 , see “1.6.5 Emer-
gency detail information
2
”.
(4) Transmit the code “59”from the Jig RCU once again to re-
set the display.
1.6.2 Clearing the emergency history
(1) Display the emergency history.
(2) Transmit the code “36”from the Jig RCU.
(3) Reset the emergency display.
Example 1 E : 01 : 03
Previous emergency
Latest emergency
No emergency record
Example 2 E : ––:
––
1.6.1 Displaying the emergency information
(1) Transmit the code “59”from the Jig RCU.
The FDP shows the emergency content in the form of
“E:**:**”.
INITIAL MODE
DATA CODE
CUSTOM CODE
43: A CODE
53: B CODE
[Data transmitting method]
Depress the “”( 3 ) button
after the data code is set.
Jig RCU
(Y292-03e)

1-7
When the mechanism mode cannot be changed to an-
other mode even when the loading motor has rotated
for more than 4 seconds in the loading direction, [E:01]
is identified and the power is turned off.
When the mechanism mode cannot be changed to an-
other mode even when the loading motor has rotated
for more than 4 seconds in the unloading direction, [E:02]
is identified and the power is turned off.
When the take-up reel pulse has not been generated for
more than 4 seconds in the capstan rotating mode, [E:03]
is identified, the pinch rollers are turned off and stopped,
and the power is turned off. However, the reel EMG is
not detected in STILL/SLOW modes.
When the drum FG pulse has not been input for more
than 3 seconds in the drum rotating mode, [E:04] is iden-
tified, the pinch rollers are turned off and stopped, and
the power is turned off.
When the eject operation does not complete in 3 sec-
onds after the start, [E:05] is identified, the pinch rollers
are turned off and stopped, and the power is turned off.
When the cassette insertion operation does not complete
in 3 seconds after the start, the cassette is ejected. In
addition, when the operation does not complete within
3 seconds after the start, [E:05] is also identified and the
power is turned off immediately.
When the capstan FG pulse has not been generated for
more than 1 second in the capstan rotating mode, [E:06]
is identified, the pinch rollers are turned off and stopped,
and the power is turned off.However, the capstan EMG
is not detected in STILL/SLOW/FF/REW modes.
When short-circuiting of the SW power supply with GND
has lasted for 0.5 second or more, [E:07] is identified,
all the motors are stopped and the power is turned off.
When DD tilting does not complete in 4 seconds, [E:08]
is identified, the tilt motor is stopped and the power is
turned off.
When the DD FG pulse is not generated within 2.5 sec-
onds, [E:09] is identified, the tilt motor is stopped and
the power is turned off.
When the supply reel pulse has not been generated for
more than 10 seconds in the capstan rotating mode,
[E:0A] is identified and the cassette is ejected (but the
power is not turned off). However, note that the reel EMG
is not detected in the SLOW/STILL mode.
1
The mechanism is locked in the middle of mode transition.
2 The mechanism is locked at the loading end due to the encoder position
reading error during mode transition.
3 Power is not supplied to the loading MDA.
1 The mechanism is locked in the middle of mode transition.
2 The mechanism is locked at the unloading end due to the encoder posi-
tion reading error during mode transition.
3 Power is not supplied to the loading MDA.
1 The take-up reel pulse is not generated in the FWD transport modes (PLAY/
FWD SEARCH/FF, etc.) because;
1) The idler gear is not meshed with the take-up reel gear;
2)
The idler gear is meshed with the take-up reel gear, but incapable of wind-
ing due to too large mechanical load (abnormal tension);
3) The take-up reel sensor does not output the FG pulse.
2 The supply reel pulse is not generated in the REV transport modes (REV
SEARCH/REW, etc.) because;
1) The idler gear is not meshed with the supply reel gear.
2) The idler gear is meshed with the supply reel gear, but incapable of wind-
ing due to too large a mechanical load (abnormal tension);
3) The supply reel sensor does not output the FG pulse.
3 Power is not supplied to the reel sensors.
1 The drum could not start or the drum rotation has stopped due to too large
a load on the tape, because;
1) The tape tension is abnormally high;
2)
The tape is damaged or a foreign object (grease, etc.) adheres to the tape.
2 The drum FG pulse did not reach the System controller CPU because;
1) The signal circuit is disconnected in the middle;
2) The FG pulse generator (hall device) of the drum is faulty.
3 The drum control voltage (DRUM CTL V) is not supplied to the MDA.
4 Power is not supplied to the drum MDA.
1 The cassette cannot be ejected due to a failure in the drive mechanism of
the housing.
2 When the housing load increases during ejection, the loading motor is
stopped because of lack of headroom in its drive torque.
Housing load increasing factors: Temperature environment (low tempera-
ture, etc.), mechanism wear or failure.
3 The sensor/switch for detecting the end of ejection are not functioning normally.
4 The loading motor drive voltage is lower than specified or power is not sup-
plied to the motor (MDA).
5 When the user attempted to eject a cassette, a foreign object (or perhaps
the user's hand) was caught in the opening of the housing.
1 The capstan could not start or the capstan rotation has stopped due to too
large a load on the tape, because;
1) The tape tension is abnormally high (mechanical lock);
2) The tape is damaged or a foreign object (grease, etc.) is adhered to the
tape (occurrence of tape entangling, etc.).
2 The capstan FG pulse did not reach the System controller CPU because;
1) The signal circuit is disconnected in the middle;
2) The FG pulse generator (MR device) of the capstans is faulty.
3 The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA.
4 Power is not supplied to the capstan MDA.
1 The SW 5 V power supply circuit is shorted with GND.
2 The SW 12 V power supply circuit is shorted with GND.
1The absolute value sensor is defective. (The soldered parts have separated.)
2The pull-up resistor at the absolute sensor output is defective. (The soldered parts
have separated.)
3Contact failure or soldering failure of the pins of the connector (board-to-board) to the
absolute value sensor.
4
The absolute value sensor data is not sent to the System Controller CPU.
1The FG sensor is defective. (The soldered parts have separated.)
2The pull-up resistor at the FG sensor output is defective. (The soldered parts have
separated.)
3Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor.
4The power to the sensor is not supplied. (Connection failure/soldering failure)
5The FG pulse is not sent to the System Controller CPU.
6
The tilt motor is defective. (The soldered parts have separated.)
7The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)
8The tilt motor drive MDA - IC is defective.
9Auto-recovery of the DD tilting cannot take place due to overrun.
1 The supply reel pulse is not generated in the FWD transport mode (PLAY/
FWD SEARCH/FF, etc.) because;
1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cas-
sette is cut in the middle;
2) A mechanical factor caused tape slack inside and outside the supply
reel side of the cassette shell. In this case, the supply reel will not rotate
until the tape slack is removed by the FWD transport, so the pulse is not
generated until then;
3) The FG pulse output from the supply reel sensor is absent.
2 The take-up reel pulse is not generated in the REV transport mode (REV
SEARCH/REW, etc.).
1) REV SEARCH/REW is started when the tape in the inserted cassette
has been cut in the middle;
2) A mechanical factor caused tape slack inside and outside the take-up
reel side of the cassette shell. In this case, the supply reel will not rotate
until the tape slack is removed by the REV transport, so the pulse will
not be generated until that time;
3) The FG pulse output from the take-up reel sensor is absent.
3 The power to a reel sensor is not supplied.
1.6.3 Emergency content description
Note:
Emergency contents “E08/E09”are for the model with Dynamic Drum (DD).
FDP CONTENT CAUSE
Presupposing the presence of the control pulse output in the PLAY mode, when the value obtained by mixing the two V.FM output
channels (without regard to the A.FM output) has remained below a certain threshold level for more than 10 seconds, [E:C1] or [E:U1]
is identified and recorded in the emergency history. During the period in which a head clog is detected, the FDP and OSD repeat the
“3-second warning display”and “7-second noise picture display”alternately.
EMG code : “E:C1”or “E:U1”/ FDP : “U:01”/ OSD : “Try cleaning tape.”or “Use cleaning cassette.”
The head clog warning is reset when the above-mentioned threshold has been exceeded for more than 2 seconds or the mode is
changed to another mode than PLAY.
EC1 or EU1:
Head clog warning
E0A:Supply Reel
Pulse EMG
E07: SW Power
Short-Circuit
EMG
E06: Capstan FG
EMG
E05: Cassette Eject
EMG
E04: Drum FG
EMG
E03: Take Up Reel
Pulse EMG
E02:
Unloading EMG
E01: Loading EMG
Table 1-6-1
E08: DD Initialized
(Absolute
Position
Sensor)
EMG
E09: DD FG EMG

1-8
1.6.4 Emergency detail information 1
The status (electrical operation mode) of the VCR and the sta-
tus (mechanism operation mode/sensor information) of the
mechanism in the latest emergency can be confirmed based on
the figure in EMG detail information 1.
[FDP display]
*1 : *2 : 34
*1: Deck operation mode at the moment of emergency
*2:
Mechanism operation mode at the moment of emergency
3–: Mechanism sensor information at the moment of emergency
–4: Mechanism mode position at the moment of emergency
Note:
•In the Deck operation mode/Mechanism operation mode/
Mechanism mode position, the contents of the code that
is shown on the FDP differs depending on the parts
number of the System Control microprocessor (IC3001)
of the VCR.
For the microprocessor parts number that starts with the
two letters “MN”, refer to the Table of MN and for parts
number with “HD”, refer to the Table of HD.
*1: Deck Operation Mode
[Table of MN]
Display Deck Operation Mode
00 Mechanism being initialized
01 STOP with pinch roller pressure off (or tape present with P.OFF)
02 STOP with pinch roller pressure on
03 POWER OFF as a result of EMG
04 PLAY
0C REC
10 Cassette ejected
20 FF
21 Tape fully loaded, START sensor ON, short FF
22 Cassette identification FWD SEARCH before transition to FF (SP x7-speed)
24 FWD SEARCH (variable speed) including x2-speed
2C INSERT REC
40 REW
42 Cassette identification REV SEARCH before transition to REW (SP x7-speed)
44 REV SEARCH (variable speed)
4C AUDIO DUB
6C INSERT REC (VIDEO + AUDIO)
84 FWD STILL/SLOW
85 REV STILL/SLOW
8C REC PAUSE
8D Back spacing
8E Forward spacing (FWD transport mode with BEST function)
AC INSERT REC PAUSE
AD INSERT REC Back spacing
CC AUDIO DUB PAUSE
CD AUDIO DUB Back spacing
EC INSERT REC (VIDEO + AUDIO) PAUSE
ED INSERT REC (VIDEO + AUDIO) Back spacing
*2 : Mechanism Operation Mode
[Table of MN]
Display Mechanism Operation Mode
00 Command standby (Status without executing command)
02 POWER OFF by EMG occurrence
04 Moving to the adjacent position in the LOAD direction
06 Moving to the adjacent position in the UNLOAD direction
08 Cassette ejection being executed
0A Cassette insertion being executed
0C Tape being loaded
0E Tape being unloaded
10 Mode transition to STOP with pinch roller compression ON
12 Mode transition to STOP with pinch roller compression OFF
14 Mode transition to STOP with pinch roller compression OFF as a result
of POWER OFF
16 Mode transition to STOP with pinch roller compression ON as a result of
POWER ON
18 Mode transition to PLAY
1A Mode transition to FWD SEARCH
1C Mode transition to REC
1E Mode transition to FWD STILL/SLOW
20 Mode transition to REV STILL/SLOW
22 Mode transition to REV SEARCH
24 Mode transition from FF/REW to STOP
26 Mode transition to FF
28 Mode transition to REW
2A 4 sec. of REV as a result of END sensor going ON during loading
2C Short FF/REV as a result of tape sensor going ON during unloading
2E Mechanism position being corrected due to overrun
80 Mechanism in initial position (Dummy command)
[Table of HD]
Display Deck Operation Mode
00 STOP with pinch roller pressure off (or tape present with P.OFF)
01 STOP with pinch roller pressure on
04 PLAY
0E REC
11 Cassette ejected
22 FF
26 FWD SEARCH (variable speed) including x2-speed
2E INSERT REC
43 REW
47 REV SEARCH (variable speed)
4C AUDIO DUB
6E INSERT REC (VIDEO+AUDIO)
84 FWD STILL/SLOW
85 REV STILL/SLOW
8F REC PAUSE
AF INSERT REC PAUSE
CD AUDIO DUB PAUSE
EF INSERT REC (VIDEO+AUDIO) PAUSE
[Table of HD]
Display Mechanism Operation Mode
00 STOP with pinch roller pressure off
01 STOP with pinch roller pressure on
02 U/L STOP (or tape being loaded)
04 PLAY
05 PLAY (x1-speed playback using JOG)
0E REC
11 Cassette ejected
22 FF
26 FWD SEARCH (variable speed) including x2-speed
2E INSERT REC
43 REW
47 REV SEARCH
4C AUDIO DUB
6E INSERT REC (VIDEO + AUDIO)
84 FWD STILL/SLOW
85 REV STILL/SLOW
8F REC PAUSE
AF INSERT REC PAUSE
C7 REV SEARCH (x1-speed reverse playback using JOG)
CD AUDIO DUB PAUSE
EF INSERT REC (VIDEO + AUDIO) PAUSE
F0 Mechanism being initialized
F1 POWER OFF as a result of EMG
F2 Cassette being inserted
F3 Cassette being ejected
F4 Transition from STOP with pinch roller pressure on to STOP with pinch
roller pressure off
F5 Transition from STOP with pinch roller pressure on to PLAY
F6 Transition from STOP with pinch roller pressure on to REC
F7 Cassette type detection SEARCH before FF/REW is being executed
F8 Tape being unloaded
F9 Transition from STOP with pinch roller pressure off to STOP with pinch
roller pressure on
FA Transition from STOP with pinch roller pressure off to FF/REW
FB Transition from STOP with pinch roller pressure off to REC.P (T.REC,etc.)
FC Transition from STOP with pinch roller pressure off to cassette type de-
tection SEARCH
FD Short REV being executed after END sensor on during unloading
FE Tension loosening being executed after tape loading (STOP with pinch
roller pressure on)

1-9
3–: Mechanism Sensor Information
[Common table of MN and HD]
Display
Mechanism Sensor Information
S-VHS SW
REC SAFETY SW START SENSOR END SENSOR
0–VHS Tab broken ON ON
1–VHS Tab broken ON OFF
2–VHS Tab broken OFF ON
3–VHS Tab broken OFF OFF
4–VHS Tab present ON ON
5–VHS Tab present ON OFF
6–VHS Tab present OFF ON
7–VHS Tab present OFF OFF
8–S-VHS Tab broken ON ON
9–S-VHS Tab broken ON OFF
A–S-VHS Tab broken OFF ON
B–S-VHS Tab broken OFF OFF
C–S-VHS Tab present ON ON
D–S-VHS Tab present ON OFF
E–S-VHS Tab present OFF ON
F–S-VHS Tab present OFF OFF
*5 : Cassette tape type 1
Display Cassette Tape Type 1
00 Cassette type not identified
16 Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified
82 Small reel, thick tape (T-120) identified/thin tape (T-140) identified
84 Large reel (T-0 to T-60) identified
92 Small reel, thick tape (T-130) identified/thin tape (T-160 to T-210) identified
93 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) not classified
C3 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
D3 Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
E1 C cassette, thick tape (TC-10 to TC-20) identified
E2 Small reel, thick tape (T-0 to T-100) identified
E9 C cassette, thin tape (TC-30 to TC-40) identified
F1
C cassette, thick tape/thin tape (TC-10 to TC-40) not classified
1.6.5 Emergency detail information 2
The type of the cassette tape and the cassette tape winding po-
sition can be confirmed based on the figure in EMG detail infor-
mation 2.
[FDP display]
*5: *6: *7
*5: Type of the cassette tape in use 1
*6: Winding position of the cassette tape in use
*7:
Type of the cassette tape in use 2 (Winding area)
Notes:
• Cassette tape type
1
is identified a few times during mode tran-
sition and the identification count is variable depending on the
cassette tape type. If an EMG occurs in the middle of identifi-
cation, the cassette tape type may not be able to be identified.
• If other value than those listed in the above table is displayed,
the cassette tape type is not identified.
*7: Cassette tape type 2(Winding area)
Display Cassette Tape Type 2
00 Cassette type not identified
07 Small reel, thick tape T-5
08 - 0E C cassette, thick tape TC-10
09 - 15 C cassette, thick tape TC-20P
0A - 0B Small reel, thick tape T-20
0A - 16 C cassette, thin tape TC-30
0A - 16 C cassette, thin tape TC-40
0D - 0F Small reel, thick tape T-40
11 - 14 Small reel, thick tape T-60
15 - 18 Small reel, thick tape T-80/DF-160
17 - 1A Small reel, thick tape T-80/DF-180
19 - 1D Small reel, thick tape T-100
1D - 21 Small reel, thick tape T-120/DF-240
1E - 1F Small reel, thin tape T-140
1F - 23 Small reel, thick tape T-130
21 - 23 Small reel, thin tape T-160
21 - 23 Small reel, thin tape T-168
22 - 24 Small reel, thick tape DF-300
22 - 24 Small reel, thin tape T-180/DF-380
22 - 24 Small reel, thin tape T-210/DF-420
22 - 23 Large reel T-5
23 - 24 Large reel T-10
25 - 26 Large reel T-20
27 - 29 Large reel T-30
29 - 2B Large reel T-40
2D - 2F Large reel T-60
Note:
•The values of cassette tape type
2
in the above table are
typical values with representative cassette tapes.
*6: Cassette tape winding position
The cassette tape winding position at the moment of EMG is
displayed by dividing the entire tape (from the beginning to the
end) in 22 sections using a hex number from “00”to “15”.
“00”: End of winding
“15”: Beginning of winding
“FF”: Tape position not identified
–4: Mechanism Mode Position
[Table of MN]
Display Mechanism Mode Position
-0 Initial value
-1 EJECT position
-2 Housing operating
-3 U/L STOP position
-4 Tape being loaded/unloaded (When the pole base is located on the front
side of the position just beside the drum)
-5 Tape being loaded/unloaded (When the pole base is located on the rear
side of the position just beside the drum)
-6 Pole base compressed position
-7 FF/REW position
-8 Between FF/REW and STOP with pinch roller compression ON
-9 STOP with pinch roller compression OFF
-A Between STOP with pinch roller compression OFF and REV
-B REV (REV STILL/SLOW) position
-C Between REV and FWD
-D FWD (FWD STILL/SLOW) position
-E Between FWD and PLAY
-F PLAY position
[Table of HD]
Display Mechanism Mode Position
–0 EJECT position
–1 U/L STOP position
–2 Tape being loaded/unloaded (When the pole base is located on the rear
side of the position just beside the drum)
–3 FF/REW position
–4 STOP with pinch roller pressure off
–5 REV (REV STILL/SLOW) position
–6 FWD (FWD STILL/SLOW) position, PLAY position
–7 Intermediate position during transition between other mechanism modes
Note:
•As the display is always “–7”at any intermediate position
between mechanism modes, the position of transitory
EMG may sometimes not be locatable.
Note:
•EMG detail information
2
is the reference information
stored using the remaining tape detection function of the
cassette tape. As a result, it may not identify cassette cor-
rectly when a special cassette tape is used or when the
tape has variable thickness.

1-10
PIN NO. LABEL IN/OUT FUNCTION
1 CTL(+) IN/OUT CTL(+) SIGNAL
2 SVSS - GND
3 CTL(-) IN/OUT CTL(-) SIGNAL
4 CTLBIAS - CTL BIAS VOLTAGE
5 CTLFB IN CTL PULSE FEEDBACK
6 CTLAMPOUT OUT CTL PULSE OUTPUT
7 CTLSMTIN IN CTL PULSE INPUT
8 CFG IN CAPSTAN FG PULSE INPUT
9 SVCC - SYSTEM POWER
10 AVCC - SYSTEM POWER FOR ANALOG CIRCUIT
11 NORM/MESEC/S IN SVHS MODE:H
12 SECAM_DET(H)/KILLER_DET IN DETECTION SIGNAL FOR SECAM ON PB MODE (SECAM:H) / NC
13 VIDEO_ENV IN AUTO TRACKING DETECT/INPUT THE AVERAGE OF PLAYBACK VIDEO SIGNAL
14 START_SENSOR IN START SENSOR
15 END_SENSOR IN END SENSOR
16 IND(L) IN AUDIO INPUT (LCH) FOR THE FDP AUDIO INDICATOR
17 DD_ABS - NC
18 SCR_ID IN SCRAMBLE CONTROL INPUT (SCRAMBLE:H)
19 IND(R) IN AUDIO INPUT (RCH) FOR THE FDP AUDIO INDICATOR
20 BS_ANT/AFC IN TUNING CLOCK
21 LED/RF AGC IN
NC/CHANGES IN ATS+IC OUTPUT AS CAUSED BY CHANGES IN RECEIVER SENSITIVITY
WHEN
THE SAME CHANNEL IS RECEIVED MORE THAN ONCE ARE INPUT.
22 A.ENV/ND(L) IN AUDIO PB FM ENV.INPUT/NON HiFi MODE:L
23 AVSS - GND FOR ANALOG CIRCUIT
24 CTL_GAIN OUT CONTROL AMP OUT FREQUENCY RESPONSE SWITCHING
25 LSA IN MECHANISM MODE DETECT(A)
26 LSB IN MECHANISM MODE DETECT(B)
27 LSC IN MECHANISM MODE DETECT(C)
28 CAP_REV(L) OUT CAPSTAN MOTOR REVERSE CONTROL (FWD:H/REV:L)
29 RC IN REMOTE CONTROL DATA INPUT
30 LOCK(L)/P.SAVE[0.1] IN TUNING PLL LOCK DETECT:L / NC
31 P50_IN IN CONTROL SIGNAL FOR TV LINK
32 R.PAUSE/COMPU_IN IN REMOTE PAUSE CONTROL [HR-S7700MS] / NC
33 RAE_OUT/COMPUOUT - NC
34 P50_OUT OUT CONTROL SIGNAL FOR TV LINK
35 LMC1 OUT LOADING MOTOR DRIVE(1)
36 LMC2 OUT LOADING MOTOR DRIVE(2)
37 LMC3 OUT LOADING MOTOR DRIVE(3)
38 SB_G(PWM) OUT VOLTAGE CONTROL SIGNAL FOR VIDEO FREQUENCY RESPONSE
39 STB/TEST OUT STROBE SIGNAL (FOR FDP DRIVER)
40 POWER_DET IN DETECTION SIGNAL FOR POWER DOWN OF AC POWER SUPPLY
41 REC_SAFETY IN REC SAFETY SWITCH DETECT (SW ON:L)
42 PROTECT IN DETECTION SIGNAL FOR SW POWER SUPPLY
43 VSS - GND
44 RMO OUT REMOTE CONTROL OUTPUT FOR SATELLITE RECEIVER
45 VCC - SYSTEM POWER
46 EXP2_DATA IN/OUT SERIAL DATA TRANSFER OUTPUT FOR TUNER/REG CONTROL
47 EXP1_DATA IN/OUT SERIAL DATA TRANSFER OUTPUT FOR AUDIO/VIDEO CONTROL
48 EXP_CLK OUT SERIAL DATA TRANSFER CLOCK FOR AUDIO/VIDEO AND TUNER/REG CONTROL
49 I2C_DATA_A/V IN/OUT SERIAL DATA TRANSFER OUTPUT FOR THE VIDEO/AUDIO IC
50 I2C_CLK_A/V OUT SERIAL DATA TRANSFER CLOCK FOR THE VIDEO/AUDIO IC
51 S.DATA_TOSYS IN SERIAL DATA TRANSFER OUTPUT FROM THE ON-SCREEN IC TO THE FDP DRIVER
52 S.DATA_FRSYS OUT SERIAL DATA TRANSFER OUTPUT FROM THE FDP DRIVER TO THE ON-SCREEN IC
53 S.CLK OUT SERIAL DATA TRANSMISSION CLOCK FROM THE FDP DRIVER TO THE ON-SCREEN IC
54 SP_FG IN DETECTION SIGNAL FOR SUPPLY REEL ROTATION/TAPE REMAIN
55 TU_FG IN DETECTION SIGNAL FOR TAKE-UP REEL ROTATION/TAPE REMAIN
56 SECAM(H)/EDS(H) OUT COLOUR SYSTEM SECAM:H / NC
1.7 SYSCON CIRCUIT
1.7.1 Syscon CPU pin function (IC3001) 1/2
Table 1-7-1 SYSCON CPU pin function(1/2)

1-11
1.7.2 Syscon CPU pin function (IC3001) 2/2
Table 1-7-2 SYSCON CPU pin function(2/2)
PIN NO. LABEL IN/OUT FUNCTION
57 TU_CE OUT CHIP ENABLE OF THE TUNER UNIT
58 N.REC_ST(H) OUT NORMAL AUDIO SOUND RECORDING START
59 DD_FG - NC
60 TU_CLK OUT CLOCK FOR DATA TRANSFER TO THE TUNER UNIT
61 TU_DATA OUT TUNING DATA
62 FWE - NC
63 NMI(L) - NC
64 X2 - TIMER CLOCK (32.768KHz)
65 X1 - TIMER CLOCK (32.768KHz)
66 RES(L) - RESET TERMINAL (RESET ON:L)
67 OSC1(IN) - MAIN SYSTEM CLOCK(10MHz)
68 VSS - GND
69 OSC2(OUT) - MAIN SYSTEM CLOCK(10MHz)
70 VCC - SYSTEM POWER
71 MODE - NC
72 TU_A_MUTE(H) OUT TUNER AUDIO MUTE CONTROL (MUTE:H)
73 TU_V_MUTE(H) OUT TUNER VIDEO CONTROL (MUTE:H)
74 A.MUTE(H) OUT AUDIO MUTE CONTROL (MUTE:H)
75 I2C_CLK2 OUT SERIAL DATA TRANSFER CLOCK FOR MEMORY IC
76 I2C_DATA2 IN/OUT SERIAL DATA TRANSFER OUTPUT FOR MEMORY IC
77 DDCFWD - NC
78 DDCREV - NC
79 DDSPDCTL - NC
80 V.P.CTL OUT V.PULSE CONTROL, V COMPENSATION DURING SPECIAL PLAYBACK [HR-S7700MS]
81 R-Y_REV/EDS_CS - NC
82 VCC - SYSTEM POWER
83 SLOW_P OUT MEMORY TIMING CONTROL IN THE SLOW MODE [HR-S7700MS]
84 VSS - GND
85 SP_SHORT(H) OUT MODE SELECT [HR-S6700MS]
86 LP_SHORT(H) OUT MODE SELECT [HR-S6700MS]
87 FLY_ON(H) OUT FLYING ERASE ON:H [HR-S7700MS]
88 H.REC_ST(H) OUT HIFI AUDIO SOUND RECORDING START
89 TRICK(H)/M_TRICK(L) - NC
90 HEAD_SEL IN HEAD SELECT(LP HEAD:H, SP HEAD:L)
91 OSD_CS OUT CHIP SELECT FOR THE ON-SCREEN IC
92 SYNC_DET(H) IN DETECTION OF VIDEO SYNC SIGNAL (DETECTED:H)
93 MESECAM(H) OUT MESECAM:H
94 JSB/STLB IN INPUT FOR THE JOG SHUTTLE [HR-S7700MS]
95 SHTL(L)/JOGA IN INPUT FOR THE JOG SHUTTLE [HR-S7700MS]
96 JOGB/S_CASS(H) IN NC/DETECTION SIGNAL FOR SVHS CASSETTE (SVHS:H)
97 JSA/STLA IN INPUT FOR THE JOG SHUTTLE [HR-S7700MS]
98 C.SYNC IN COMPOSITE SYNC
99 A.FF OUT AUDIO FF OUTPUT
100 V.FF OUT ROTATION DETECTION SIGNAL FOR DRUM MOTOR/TIMING CONTROL SIGNAL FOR REC
101 CAPPWM OUT CAPSTAN MOTOR CONTROL
102 DRUMPWM OUT DRUM MOTOR CONTROL
103 SUB_RESET - NC
104 HI_FF/REW(L) OUT HIGH SPEED FF/REW:L
105 SUB_BUSY - NC
106 SUB_CS - NC
107 DPG IN DRUM PICKUP PULSE INPUT (SWITCHING PULSE)
108 DFG IN DRUM FG PULSE INPUT
109 VCC - SYSTEM POWER
110 V.PULSE OUT V.PULSE ADDITION TIMING CONTROL
111 VSS - GND
112 CTLREF - CTL REFERENCE VOLTAGE

2-1
SECTION 2
MECHANISM ADJUSTMENT
2.1 BEFORE STARTING REPAIR AND ADJUSTMENT
2.1.1 Precautions
(1) Unplug the power cable of the main unit before using your
soldering iron.
(2) Take care not to cause any damage to the conductor
wires when plugging and unplugging the connectors.
(3) Do not randomly handle the parts without identifying
where the trouble is.
(4) Exercise enough care not to damage the lugs, etc. dur-
ing the repair work.
(5) When installing the front panel assembly, be sure to hook
the lug on the back side of the cassette door to the door
opener of the cassette holder. If this operation is ne-
glected it will not be possible to remove the cassette when
ejecting because the housing door cannot be opened.
2.1.2 Checking for Proper Mechanical Operations
Enter the mechanism service mode when you want to oper-
ate the mechanism when no cassette is loaded. (See 1.5
MECHANISM SERVICE MODE.)
2.1.3 Manually Removing the Cassette Tape
1. In case of electrical failures
If you cannot remove the cassette tape which is loaded be-
cause of any electrical failure, manually remove it by taking
the following steps.
(1) Unplug the power cable and remove the top cover,
bracket and front panel assembly. (See 1.3 DISASSEM-
BLY/ASSEMBLY METHOD.)
(2) Unload the cassette by manually turning the loading mo-
tor of the mechanism assembly toward the front. In do-
ing so, hold the tape by the hand to keep the slack away
from any grease. (See Fig.2-1-3a.)
(3) Bring the pole base assembly (supply or take-up side) to
a pause when it reaches the position where it is hidden
behind the cassette tape.
(4) Move the top guide toward the drum while holding down
the lug A of the bracket retaining the top guide. Like-
wise hold part B down and remove the top guide.
Section C of the top guide is then brought under the
cassette lid. Then remove the top guide by pressing the
whole cassette tape down. (See Fig.2-1-3b.)
(5) Remove the cassette tape by holding both the slackened
tape and the cassette lid.
(6) Take up the slack of the tape into the cassette. This com-
pletes removal of the cassette tape.
Fig. 2-1-3b
Fig. 2-1-3a
Loading motor
Pole base assembly
Press
C
A
B

2-2
2. In case of mechanical failure
If you cannot remove the cassette tape which is loaded be-
cause of any mechanical failure, manually remove it by tak-
ing the following steps.
(1) Unplug the power cable and remove the top cover, front
panel assembly and others so that the mechanism as-
sembly is visible. (See 1.3 DISASSEMBLY/ASSEMBLY
METHOD.)
(2) While keeping the tension arm assembly of the mecha-
nism assembly free from tension, pull the tape on the pole
base assembly (supply or take-up side) out of the guide
roller. (See Fig.2-1-3c.)
(3) Take the spring of the pinch roller arm assembly off the
hook of the press lever assembly, and detach it from the
tape. (See Fig.2-1-3d.)
(4) In the same way as in the electrical failure instructions in
2.1.3-1(4), remove the top guide.
(5) Raise the cassette tape cover. By keeping it in that posi-
tion, draw out the cassette tape case from the cassette
holder and take out the tape.
(6) By hanging the pinch roller arm assembly spring back
on the hook, take up the slack of the tape into the cas-
sette.
Fig. 2-1-3d
Fig. 2-1-3c
Pole base assembly (take-up side)
Pole base assembly
(supply side)
Tension arm assembly
Guide pole guard
Pinch roller arm assembly
Press lever assembly
Take the spring
off the hook, and
detach it from the
tape.
2.1.4 Jigs and Tools Required for Adjustment
Roller driver
PTU94002
A/C head positioning tool
PTU94010
Back tension cassette gauge
PUJ48076-2
Jig RCU
PTU94023B
Alignment tape
(SP, stairstep, PAL)
MHPE
Alignment tape
(LP, stairstep, PAL)
MHPE-L
Torque gauge
PUJ48075-2

2-3
2.1.5 Maintenance and Inspection
1. Location of major mechanical parts
In this chapter, the two mechanism speeds are described by comparing the speeds of the standard type and the high-speed
FF/REW type.
It is possible to distinguish between these two types of mechanism by the diameters of their capstan pulleys.
The capstan pulley diameter for the standard type is approx. 32 mm.
The capstan pulley diameter for the high-speed FF/REW type is approx. 43 mm.
For information on the different parts used in the two mechanism types, please refer to the “Replacement of major parts”.
Fig. 2-1-5a Mechanism assembly top side
Stator assembly
UV catcher2 (supply and take-up side)
Drum assembly Head base
Audio control head
Loading motor
Pinch roller arm
assembly
Guide pole guard
Press lever
assembly
Lid guide
Guide arm
assembly
Reel disk
(take-up side)
Sub brake assembly
(take-up side)
Main brake assembly
(take-up side)
Idler arm assembly
Idler lever
Main brake assembly
(supply side)
Reel disk
(supply side)
Rec safety lever
Tension brake
assembly
Adjust pin
Tension arm
assembly
Pole base assembly
(supply side)
Full erase head
Pole base assembly (take-up side)
T1
T26
T25
T24
T23
T22
T2
T3 T5 T7
T8
T9
T10
T11
T12
T13
T14
T15
T16T18
T20
T17T19T21
T6
Fig. 2-1-5b Mechanism assembly bottom side
Belt
(loading motor)
Capstan motor
Belt (capstan)
Capstan brake assembly
Loading arm gear (take-up side)
Loading arm gear (supply side)
Plate
(supply side)
Control plate
Worm gear
Control cam
Cassette gear
Rotary encoder
Change lever assembly Clutch unit
Take-up lever
Take-up head
Control
bracket1
Tension arm
bearing
B1
B22
B3 B5
B6
B7
B8
B9
B10
B12
B15
Rotary encoder guide
B16
B17
B18
Brake lever
B19
B20
B21
B14
B11
B4
B2
Direct gear
B13
Link lever

2-4
Guide rail Roller cam assembly
L2L1
Opener guide
Door
opener
Drive gear
Cassette housing bracket
Limit gear
Worm gear
Belt (loading motor)
Loading motor
R2
R3 R5
R4
R1
Fig. 2-1-5c Mechanism assembly left side
Fig. 2-1-5d Mechanism assembly right side
5. Disassembling procedure table
The following table indicates the order in which parts are re-
moved for replacement. To replace parts, remove them in
the order of 1 to 18 as shown in the table. To install them,
reverse the removal sequence.
The symbols and numbers preceding the individual part
names represent the numbers in the “Location of major me-
chanical parts”table. Also, the “T”, “B”, and “T/B”on the right
of each part name shows that the particular part is removed
from the front, from the back, and from both sides of the
mechanism, respectively.
2. Cleaning
Regular cleaning of the transport system parts is desirable
but practically impossible. So make it a rule to carry out clean-
ing of the tape transport system whenever the machine is
serviced.
When the video head, tape guide and/or brush get soiled,
the playback picture may appear inferior or at worst disap-
pear, resulting in possible tape damage.
(1) When cleaning the upper drum (especially the video
head), soak a piece of closely woven cloth or Kimu-wipe
with alcohol and while holding the cloth onto the upper
drum by the fingers, turn the upper drum
counterclockwise.
Note:
• Absolutely avoid sweeping the upper drum vertically
as this will cause damage to the video head.
(2) To clean the parts of the tape transport system other than
the upper drum, use a piece of closely woven cloth or a
cotton swab soaked with alcohol.
(3) After cleaning, make sure that the cleaned parts are com-
pletely dry before using the video tape.
3. Lubrication
With no need for periodical lubrication, you have only to lu-
bricate new parts after replacement. If any oil or grease on
contact parts is soiled, wipe it off and newly lubricate the
parts.
Note:
• See the “mechanism assembly” diagram of the parts
list for the lubricating or greasing spots, and for the
types of oil or grease to be used.
~1000H ~2000H
Upper drum assembly ¤R R
A/C head ¤R ¤R
Lower drum assembly
¤¤R
Pinch roller arm assembly ¤¤
Full erase head ¤¤
Tension arm assembly ¤¤
Capstan motor (Shaft) ¤¤
Guide arm assembly ¤¤
Capstan motor R
Capstan brake assembly R
Main brake assembly R
Belt (Capstan) RR
Belt (Loading motor) R
Loading motor R
Clutch unit R
Worm gear R
Control plate R
Brush ¤R ¤R
Tension brake assembly RR
Rotary encoder R
4. Suggested servicing schedule for main components
The following table indicates the suggested period for such
service measures as cleaning,lubrication and replacement.
In practice, the indicated periods will vary widely according
to environmental and usage conditions.However, the indi-
cated components should be inspected when a set is brought
for service and the maintenance work performed if neces-
sary. Also note that rubber parts may deform in time,even if
the set is not used.
Operation Hours
System Parts Name
¤: Cleaning
R: Inspection or Replacement if necessary
Table 2-1-5a
Other Drive Tape transport