JVC SR-VS20E User manual

SERVICE MANUAL
No. 82842
January 2001
SR-VS20E/EK
SPECIFICATIONS (The specifications shown pertain specifically to the model SR-VS20E)
Mini DV/S-VHS VIDEO CASSETTE RECORDER
Printed in Japan
VICTOR COMPANY OF JAPAN, LIMITED
VIDEO DIVISION S40894
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
SR-VS20E/EK No. 82842
T
V
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+
T
V
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R
–
T
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–
T
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123
456
789
1
2
1
2
3
VHS
DV
TV
CABLE/SAT
TV/VCR
––:– –
AUDIO
0000
START
DEBUT
STOP
FIN
DATE PR
DAILY/QTDN.
VPS/PDC
AUX
WEEKLY/HEBDO
EXPRESS
LCDPROG
0
PROG OK
3
4
4
MENU
30 SEC
ENTER/ENTREE
DVIN/OUT
ENTREE/SORTIEDV
VHSDV
A.DUBINSERT
PR
DUB
COPIE
DV VHS
STARTR.A.EDIT
IN/OUT
S-VHSET
PULL-OPEN
625
GENERAL
Power requirement : AC 220 V – 240 V`, 50 Hz/60 Hz
Power consumption
Power on : 33 W
Power off : 7.9 W
Temperature
Operating : 5°C to 40°C
Storage : –20°C to 60°C
Operating position : Horizontal only
Dimensions (WxHxD) : 435 mm x 124 mm x 391 mm
Weight : 6.7 kg
Input/Output : 21-pin SCART connectors :
IN/OUT x 1, IN/DECODER x 1
RCA connectors:
VIDEO IN x 1, AUDIO IN x 1, AUDIO OUT x 1
S-Video connectors: IN x 1, OUT x 1
DV connector: IN/OUT x 1
(4-pin, IEEE1394 conformity, digital input/output)
VHS DECK VIDEO/AUDIO
Signal system : PAL-type colour signal and CCIR monochrome
signal, 625 lines 50 fields
Recording system : DA4 (Double Azimuth) head helical scan system
Format : S-VHS/VHS PAL standard
Signal-to-noise ratio : 45 dB
Horizontal resolution
(SP/LP) : 250 lines (VHS)
400 lines (S-VHS)
(EP) : 220 lines (VHS)
350 lines (S-VHS)
Frequency range : 70 Hz to 10,000 Hz (Normal audio)
20 Hz to 20,000 Hz (Hi-Fi audio)
Maximum recording time
(SP) : 240 min. with E-240 video cassette
(LP) : 480 min. with E-240 video cassette
(EP) : 720 min. with E-240 video cassette
DV DECK VIDEO/AUDIO
Signal system : PAL-type colour signal, 625 lines 50 fields
Recording system : Digital Component Recording
Format : DV format (SD mode)
Cassette : Mini DV Cassette
Maximum recording time
(SP) : 60 min. with M-DV60ME cassette
(LP) : 90 min. with M-DV60ME cassette
Audio recording system
: PCM 48 kHz, 16 bit (2 ch)/
32 kHz, 12 bit (4 ch)
TUNER/TIMER
TV channel storage
capacity : 99 positions
(+AUX position)
Tuning system : Frequency synthesized tuner
Channel coverage : VHF 47 MHz – 89 MHz/
104 MHz – 300 MHz/
302 MHz – 470 MHz
UHF 470 MHz – 862 MHz
Memory backup time : Approx. 60 min.
ACCESSORIES
Provided accessories : RF cable,
21-pin SCART/RCA cable,
BNC/RCA adapter x 2,
Satellite Controller RM-SD1,
Infrared remote control unit,
"R6" battery x 2
Specifications shown are for SP mode unless otherwise specified.
E.& O.E. Design and specifications subject to change without notice.

Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1 HOW TO REMOVE THE MAJOR PARTS .................................................... 1-1
1.1.1 Introduction ............................................................................................ 1-1
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY .............................. 1-1
1.3 DISCONNECTION OF CONNECTORS (WIRES) ........................................ 1-1
1.4
SCREWS USED CABINET COMPONENTS AND BOARD ASSEMBLIES .......... 1-1
1.5 HOW TO REMOVE THE MAJOR PARTS <COM section> .......................... 1-2
1.5.1 Disassembly flow chart .......................................................................... 1-2
1.5.2 Disassembly/assembly method <COM section> ................................... 1-2
1.6 HOW TO REMOVE THE MAJOR PARTS <VHS section> ........................... 1-4
1.6.1 Disassembly flow chart .......................................................................... 1-4
1.6.2 DIsassembly/assembly method <VHS section> .................................... 1-4
1.7 HOW TO REMOVE THE MAJOR PARTS <DV section> .............................. 1-6
1.7.1 Disassembly flow chart .......................................................................... 1-6
1.7.2 Disassembly/assembly method <DV section> ....................................... 1-6
1.8 SERVICE POSITIONS .................................................................................. 1-8
1.8.1 Service position <VHS SIDE> ................................................................. 1-8
1.8.2 Service position <DV SIDE> .................................................................... 1-9
1.9 MECHANISM SERVICE MODE .................................................................. 1-10
1.9.1 How to set the "MECHANISM SERVICE MODE" ................................ 1-10
1.10 CONNECTION .......................................................................................... 1-11
1.11 EMERGENCY DISPLAY FUNCTION ........................................................ 1-13
1.11.1 Displaying the emergency information ................................................ 1-13
1.11.2 Clearing the emergency history ........................................................... 1-13
1.11.3 Emergency content description ........................................................... 1-14
1.11.4 Emergency detail information 1 .......................................................... 1-15
1.11.5 Emergency detail information 2 .......................................................... 1-16
2. MECHANISM ADJUSTMENT (VHS)
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
MECHANISM ADJUSTMENT (DV)
2.9 PREPARATION ........................................................................................... 2-21
2.9.1 Precautions .......................................................................................... 2-21
2.9.2 Tools Required for Adjustments ........................................................... 2-21
2.9.3 Disassembly and Assembly Procedures .............................................. 2-21
2.9.4 Screws and Washers Used in Disassembly/Assembly of the
Mechanism Assembly .......................................................................... 2-21
2.10 DISASSEMBLY/ASSEMBLY OF THE MECHANISM ASSEMBLY ............. 2-22
2.10.1 Introduction ........................................................................................ 2-22
2.10.2 Mechanism Modes ............................................................................ 2-22
2.11 MECHANISM TIMING CHART .................................................................. 2-24
2.12 MECHANISM ASSEMBLY/DISASSEMBLY PROCEDURE TABLE ........... 2-25
2.13 DISASSEMBLY/ASSEMBLY ...................................................................... 2-27
2.14 LIST OF PROCEDURES FOR DISASSEMBLY ........................................ 2-35
2.15 MECHANISM DISASSEMBLY/ASSEMBLY SHEET .................................. 2-36
2.16 MECHANISM PHASE CHECK/ADJUSTMENT ......................................... 2-38
2.17 POSITIONING THE TENSION POLE ........................................................ 2-39
2.18 COMPATIBILITY AND ERROR RATE ADJUSTMENTS ............................ 2-40
2.18.1 Preparation ........................................................................................ 2-40
2.18.2 Adjustment ......................................................................................... 2-40
2.18.3 Linearity adjustment .......................................................................... 2-41
2.18.4 PB switching point adjustment ........................................................... 2-41
2.18.5 Error rate adjustment ......................................................................... 2-41
2.18.6 Error rate measuring method ............................................................. 2-41
2.19 TAPE EJECTION ....................................................................................... 2-42
TABLE OF CONTENTS
Section Title Page Section Title Page
3. ELECTRICAL ADJUSTMENT (VHS)
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
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
3.3.7 DV EE Y level ......................................................................................... 3-4
3.4 AUDIO CIRCUIT ........................................................................................... 3-5
3.4.1 Audio REC FM ....................................................................................... 3-5
3.5 SYSCON CIRCUIT [SR-VS20E] ................................................................... 3-5
3.5.1 Timer clock ............................................................................................. 3-5
ELECTRICAL ADJUSTMENT (DV)
3.6 PREPARATION ............................................................................................. 3-6
3.6.1 Precautions ............................................................................................ 3-6
3.6.2 Equipment required for adjustment ........................................................ 3-6
3.6.3 Tools required for adjustments ............................................................... 3-6
3.6.4 Setup ...................................................................................................... 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
SWITCHING REGULATOR AND REGULATOR SCHEMATIC DIAGRAMS .......... 4-5
4.3 VIDEO/AUDIO SCHEMATIC DIAGRAM ....................................................... 4-7
4.4 SYSTEM CONTROL SCHEMATIC DIAGRAM ............................................. 4-9
4.5 SUB CPU SCHEMATIC DIAGRAM ............................................................ 4-13
4.6 TUNER SCHEMATIC DIAGRAM ................................................................ 4-15
4.7 VIDEO I/O SWITCH SCHEMATIC DIAGRAM ............................................ 4-17
4.8 AUDIO I/O SCHEMATIC DIAGRAM ........................................................... 4-19
4.9 CONNECTION SCHEMATIC DIAGRAM .................................................... 4-21
4.10 3D DIGITAL/2M SCHEMATIC DIAGRAM ................................................. 4-23
4.11 TERMINAL SCHEMATIC DIAGRAM ........................................................ 4-25
4.12 DEMODULATOR SCHEMATIC DIAGRAM .............................................. 4-27
4.13 S-SUB SCHEMATIC DIAGRAM ............................................................... 4-29
4.14 MDA SCHEMATIC DIAGRAM .................................................................. 4-31
4.15 PRE/REC SCHEMATIC DIAGRAM .......................................................... 4-33
4.16 ON SCREEN SCHEMATIC DIAGRAM ..................................................... 4-35
4.17
DISPLAY, EJECT SW, LED/SW, JACK AND JOG SCHEMATIC DIAGRAMS ......... 4-37
4.18 DV SYSTEM CONTROL SCHEMATIC DIAGRAM ................................... 4-39
4.19 DV MSD SCHEMATIC DIAGRAM ............................................................ 4-41
4.20 DV MAIN SCHEMATIC DIAGRAM ........................................................... 4-43
4.21 DV I/O SCHEMATIC DIAGRAM ............................................................... 4-45
4.22 DV V OUT SCHEMATIC DIAGRAM ......................................................... 4-47
4.23 AUDIO AD/DA SCHEMATIC DIAGRAM ................................................... 4-49
4.24 DV DSP SCHEMATIC DIAGRAM ............................................................. 4-51
4.25
SWITCHING REGULATOR AND REGULATOR CIRCUIT BOARDS .......... 4-53
4.26 3D DIGITAL/2M AND S-SUB CIRCUIT BOARDS .................................... 4-55
4.27 TERMINAL CIRCUIT BOARD .................................................................. 4-56
4.28 MAIN CIRCUIT BOARD ........................................................................... 4-57
4.29 DEMODULATOR AND ON SCREEN CIRCUIT BOARDS ........................ 4-60
4.30
DISPLAY, EJECT SW, JACK, LED/SW AND JOG CIRCUIT BOARDS .......... 4-61
4.31 PRE/REC MDA CIRCUIT BOARD ............................................................ 4-63
4.32 DV MAIN CIRCUIT BOARD ..................................................................... 4-65
4.33 FDP GRID ASSIGNMENT AND ANODE CONNECTION ......................... 4-71
4.34 REMOTE CONTROL SCHEMATIC DIAGRAM ........................................ 4-72
4.35 WAVEFORMS ........................................................................................... 4-73
4.36 VOLTAGE CHARTS .................................................................................. 4-75
4.37 CPU PIN FUNCTION ................................................................................ 4-78
4.38 SYSTEM CONTROL BLOCK DIAGRAM (VHS) ....................................... 4-79
4.39 VIDEO BLOCK DIAGRAM(VHS) .............................................................. 4-81
4.40 AUDIO BLOCK DIAGRAM (VHS) ............................................................. 4-85
4.41 SYSTEM CONTROL BLOCK DIAGRAM (DV) ......................................... 4-87
4.42 VIDEO BLOCK DIAGRAM (DV) ............................................................... 4-89
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ....................................... 5-1
5.2 FINAL ASSEMBLY <M2> ............................................................................. 5-2
5.3 MECHANISM ASSEMBLY (VHS) <M3> ...................................................... 5-4
5.4 MECHANISM ASSEMBLY (DV) <M4> ......................................................... 5-6
5.5 ELECTRICAL PARTS LIST ........................................................................... 5-8
SW REGULATOR BOARD ASSEMBLY <01> ................................................... 5-8
REGULATOR BOARD ASSEMBLY <02> .......................................................... 5-9
MAIN BOARD ASSEMBLY <03> ..................................................................... 5-10
3D DIGITAL/2M BOARD ASSEMBLY <05> ..................................................... 5-18
TERMINAL BOARD ASSEMBLY <06> ............................................................ 5-19
AUDIO CONTROL HEAD BOARD ASSEMBLY <12> ..................................... 5-21
DEMOD BOARD ASSEMBLY <14> ................................................................. 5-21
S-SUB BOARD ASSEMBLY <15> ................................................................... 5-22
DV PRE/REC MDA BOARD ASSEMBLY <16> ............................................... 5-23
ON SCREEN BOARD ASSEMBLY <17> ......................................................... 5-24
EJECT SW BOARD ASSEMBLY <27> ............................................................ 5-25
SW/DISPLAY BOARD ASSEMBLY <28> ........................................................ 5-25
JACK BOARD ASSEMBLY <36> ..................................................................... 5-26
LED/SW BOARD ASSEMBLY <47> ................................................................ 5-26
DV MAIN BOARD ASSEMBLY <50> ............................................................... 5-26
LOADING MOTOR BOARD ASSEMBLY <55> ............................................... 5-32
JOG BOARD ASSEMBLY <85> ....................................................................... 5-32
SR-VS20EK SR-VS20E
VIDEO SYSTEM PAL/NTSC PB ON PAL TV PAL/MESECAM(MANUAL)/NTSC PB ON PAL TV
TUNER (BROADCASTING STANDARD) I B/G, D/K
TUNER (STEREO DECODER) NICAM NICAM/A2
DISPLAY (LANG.) ENGLISH 3 LANGUAGE
TIMER (VCR PLUS+) VIDEO PLUS+ DELUXE SHOW VIEW DELUXE
TIMER (VPS) NOT USED USED
The following table lists the differing points between Models (SR-VS20EK and SR-VS20E) 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
1.1 HOW TO REMOVE THE MAJOR PARTS
1.1.1 Introduction
This set is a double-deck video recorder integrating a Mini DV
deck and a VHS deck. Its internal structure is divided into three
sections that include the power supply, VHS and DV sections.
Therefore, the removal of major parts will also be described
under three separate sections as listed below.
1. COMMON section
2. VHS section
3. DV section
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY
3. DV section
1. COMMON section 2. VHS section
< TOP VIEW >
(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**).
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
Fig. 1-1-1
§§ §§ §
(1) (2) (3) (4) (5)
Step/
Loc No.
Fig. No. Point NotePart name
Top cover, Bracket COM1
4(S1), 3(S2), 2(L1), (L2)
2(S3)
1—
Front panel
assembly
COM2 8(L3),
CN7507(WR1),
CN3011(WR2)
<Note
1,2,3,4>
2
1.3 DISCONNECTION OF CONNECTORS (WIRES)
CONNECTOR
FPC
CONNECTOR
FPC
Fig. 1-3-1 Fig. 1-3-2
Fig. 1-3-3 Fig. 1-3-4
CONNECTOR
FPC
Fig. 1-3-5
CONNECTOR
FPC
CONNECTOR
FPC
1.4 SCREWS USED CABINET COMPONENTS AND
BOARD ASSEMBLIES
Table 1-4-1 below shows the symbols, shapes, colors and
part numbers of screw that are used in the cabinet compo-
nents and board assemblies and are appearing in the disas-
sembling/reassembling diagrams in this manual.
When screwing them again in reassembling, be sure to use
them correctly referring to the following table.
Notes:
•Screw that are asterisked (marked with*) in the shape col-
umn are fixed with screw lock agent. If such the screw is
once removed, never use it again.
•The Screw symbols are assigned nos. in priority order and
do not correspond to those on the spare parts list.
SYMBOL PARTS NO. COLOR
S1 QYTDST3006R SILVER BLACK
S4 QYTDSF2606Z GOLD
S8 PQ21623-2-5 GOLD
S5 QYTDST3006Z GOLD
S2 QYTDST3006M BLACK
S6 QYTDSF3008M BLACK
S3 QYTDSF3010Z GOLD
S7 QYTDST2610Z GOLD
S11 QYTDSP2004Z GOLD
S12 QYTDST2004Z GOLD
S13 YQ43893 SILVER
S9 PQ40413 BLACK
S10 LP40700-001A BLACK
Table 1-4-1

1-2
1.5
HOW TO REMOVE THE MAJOR PARTS <COM section>
1.5.1 Disassembly flow chart
This flowchart shows the disassembly procedure for the ex-
terior parts and electrical parts.
Basically, reverse this procedure when assembling them.
1 Top cover, Bracket
2 Front panel assembly
Display board assembly, Display/SW board assembly,
3
SW board assembly, LED1, 2 board assembly
4 SW REG board assembly
5 Regulator board assembly
6 Rear cover
<Note 1>
When attaching the FPC, be sure to connect it in the cor-
rect orientation.
<Note 2>
When attaching the front panel assy, make sure that the
door openers of both decks (DV, VHS) are in the down
position.
<Note 3>
When attaching the front panel assy, be careful not to dam-
age the DV terminals.
<Note 4>
When attaching the FPC take care that it is not caught.
Pass the DV-side FPC between the base (2) and DV Main
board assy.
Pass the two VHS-side FPCs below the base (1).
1.5.2
Disassembly/assembly method <COM section>
<Note 5>
When removing the SW REG board assembly or Regula-
tor board assembly, unhook the several spacers connect-
ing it with pliers from the top side.
<Note 6>
Perform the work by leaving fan motor attached to the rear
cover except when replacing the fan motor.
When attaching the rear cover, please be careful with the
wiring.
Fig. COM1
Top cover
7
(S2)
5
(S2)
4
(S1)
3
(S1)
6
(S2)
2
(S1)
1
(S1)
1
(L1)
(L2)
1
8
(S3)
9
(S3)
Bracket
(L3)
(L3)
<Note 4>
FPC
DV Main board
assembly
WR2
WR1
<Note 4>
<Note 1>
Supporting
tape side
<Note 2>
DV SIDE
<Note 2>
VHS SIDE
Base (2)
Base (1)
<Note 3>
CN7507
CN3011
2
(L3)
(L3)
Fig. COM2
Step/
Loc No.
Fig. No. Point NotePart name
Top cover, Bracket COM1
4(S1), 3(S2), 2(L1), (L2)
2(S3)
1—
—
Front panel
assembly
COM2 8(L3),
CN7507(WR1),
CN3011(WR2)
<Note
1,2,3,4>
<Note 1,
5>
2
SW REG board
assembly
4
COM3 10(S4)
6(S4), Knob(Jog),
Knob(Shuttle),
3
Display board assembly,
LED/SW board assembly,
Eject SW board assembly,
Jack board assembly,
Jog board assembly
COM4 2(S5), 2(L4), (L5)
CN5301(WR3),
<Note 1,
5>
Regulator board
assembly
5COM5 3(L6),
CN5322(WR4),
CN5321(WR5),
CN5325(WR6),
CN5324(WR7),
CN5323(WR8)
<NOTE 6>Rear cover
6COM6 4(S2), 6(S6),
Fan motor

1-3
Fig. COM3
Fig. COM4
Fig. COM5
Fig. COM6
<Note 6>
Fan Motor
6
28
(S2)
29
(S2)
33
(S6)
32
(S6) 35
(S6)
34
(S6) 36
(S6)
37
(S6)
30
(S2)
31
(S2)
9
(S4)
20
(S4)
22
(S4)24
(S4)
25
(S4)
16
(S4)
15
(S4)14
(S4)
18
(S4)
13
(S4)
17
(S4)12
(S4)11
(S4)
10
(S4)
23
(S4)
23
(S4)
21
(S4)Display board
assembly
LED/SW board
assembly
Jog board assembly
Jack board
assembly
Eject SW
board assembly
Knob (Jog)
Knob (Shuttle)
3
2
5
CN5325
CN5324
WR8
WR5
Foil side
<Note 1>
WR4
Foil side
<Note 1>
WR6
WR7
CN5321
CN5322
(L6)
Spacer
<Note 5>
(L6)
Spacer
<Note 5>
CN5323
4
27
(S5)
WR3
Supporting
tape side
<Note 1>
(L4)
Spacer
<Note 5>
(L5) CN5301
26
(S5)

1-4
1.6
HOW TO REMOVE THE MAJOR PARTS <VHS section>
1.6.1 Disassembly flow chart
This flowchart shows the disassembly procedure for the ex-
terior parts and electrical parts.
Basically, reverse this procedure when assembling them.
However, it is required to remove the common section parts
as far as 1 “Top cover Bracket”and 2 “Front panel assem-
bly”in advance. (See section 1.5.)
1 Drum assembly
2 Mechanism assembly
3 Main board assembly / 4 Base (1)
4 Base (1)
1.6.2 DIsassembly/assembly method <VHS section>
<Note 1>
When attaching or removing the FPC, take care not to dis-
connect any of the wires.
<Note 2>
When attaching the FPC, be sure to connect it in the cor-
rect orientation.
<Note 3>
When attaching wires, connect them in the correct orien-
tation.
<Note 4>
•When it is required to remove the screws (S8) retaining the
Mechanism assembly, please refer to the “Procedures for
Lowering the Cassette holder assembly”(See on page 1-5).
•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 sen-
sor, Q3003: End sensor, S3002: S cassette switch).
Fig. 1
Fig. 2
Fig. 3
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.
Procedures for Lowering the Cassette holder assembly
Turn the loading motor pulley in the direction as indicated by
Fig.2. As both A and B levers 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 A , B , B , A .
When the holder has been lowered, turn the pulley until the
cassette holder is securely in place without allowing any up/
down movement.
Fig. V1
1
CN1
ac
CON1
b
WR9
Foil side
<Note 2>
(L1)
(L2)
(P1)
Roller arm
assy
Inertia plate
WR10
Foil side
<Note 1,2>
Cleaner assy
Not use
1
(S7)
3
(S7)
2
(S7)
Note: When installing the Drum assembly, secure the
screws (S7) in the order of a , b , c .
Step/
Loc No.
Fig. No. Point NotePart name
Drum assembly
(Inertia plate)
(Roller arm assy)
V1
3(S7), CON1(WR9),
CN1(WR10)
4(L1)
(P1), (L2)
1 <Note 1,2>
Mechanism
assembly
V2 2(S8), (S9), (S10),
(L3), (L4),
CN1(WR11),
2
<Note 2,4>
Main board
assembly
V3 6(S6), 2(S3), (S5),
CN5321(WR12),
CN5322(WR13),
CN3014(WR14),
CN703(WR15),
CN2601(WR16)
3 <Note 2>
Base (1) V4 (S3), 3(S5)4 —

1-5
Fig. V2
Fig. V3
<Note 4>
Spacer
Mechanism assy
(L3)
Spacer
<Note 4>
S3002
S cassette switch
<Note 4>
(L4)
Spacer
<Note 4>
5
(S8)
<Note 4>
4
(S8)
<Note 4>
WR11
Foil side
<Note 2>
6
(S9)
7
(S10)
2
14
(S3)
16
(S5)
15
(S3)
9
(S6)
8
(S6) 11
(S6)
10
(S6)
12
(S6)
13
(S6)
WR14
Foil side
<Note 2>
CN5322
CN703
WR13
CN2601
CN3014
WR4
Foil side
<Note 2>
WR5
Foil side
<Note 2>
WR12
Foil side
<Note 2>
CN5321
3
Fig. V4
17
(S3)
18
(S5)
19
(S5)
20
(S5)
4
Note: When installing the Mechanism assembly, secure
the screws (S8) in the order of a , b .

1-6
1.7
HOW TO REMOVE THE MAJOR PARTS <DV section>
1.7.1 Disassembly flow chart
This flowchart shows the disassembly procedure for the ex-
terior parts and electrical parts.
Basically, reverse this procedure when assembling them.
However, it is required to remove the common section parts
as far as 1 “Top cover, Bracket”and 2 “Front panel assem-
bly”in advance. (See section 1.5.)
1Mechanism assembly,
P/R MDA board assembly
2 Cassette housing assembly
3 P/R MDA board assembly
4 Mechanism assembly
5 Drum assembly
6 DV Main board assembly
1.7.2 Disassembly/assembly method <DV section>
<Note 1>
With due regard to operational considerations, remove the
parts located on the base (2) (i.e. Mechanism assembly,
P/R MDA board assembly etc.) together before removing
the major parts.
<Note 2>
Take care not to scratch or damage the drum assembly
by the cleaner assembly when performing work.
<Note 3>
Take care not to damage the board assembly when de-
taching parts.
<Note 4>
When attaching the FPC, be sure to connect it in the cor-
rect orientation.
Fig. D1
Fig. D2
1
<Note 1>
WR16
WR17
CN1501
WR17
WR7
CN5501
CN5506
4
(S5)
3
(S5)
2
(S5)
1
(S5)
Base(2)
CN5502
5
(S11)
(L2)
WR18
(L2)
(L1)
CN5507
26
(S11)
Step/
Loc No.
Fig. No. Point NotePart name
Mechanism assembly,
P/R MDA
board assembly
D1 4(S5),
CN1502(WR17),
CN5002(WR18),
CN5506(WR19),
CN5501(WR7)
1<Note 1>
<Note 2>
P/R MDA
board assembly
D3 (S12),(S11),2(S5),
CN5502(WR21),
CN5505(WR22),
CN5503(WR23),
CN5504(WR24),
CN5001(WR25),
Earth plate
3
Mechanism assembly D4 3(S4), 2(L3)
4
Drum assembly D5 3(S13)
5
<Note 3,4> DV Main board
assembly
D6 4(S5),
CN1002(WR14),
CN3701(WR16),
CN1001(WR8),
CN3501(WR15)
6
Cassette housing
assembly
D2 2(S11),2(L1),2(L2),
CN5507(WR20)
2
—
—
—

1-7
Fig. D3
Fig. D4
Fig. D5
Fig. D6
7
(S12)9
(S5)
10
(S5)
3
WR20 WR19
WR23
WR21
WR22
CN5503
CN5504
CN5001
CN5502
CN5505
Earth
plate
8
(S11)
13
(S4)
(L3)
4
12
(S4)
11
(S4)
14
(S13)
16
(S13)
15
(S13)
5
<Note 2>
6
20
(S5)
WR13
CN3501
CN3701
CN1001
CN1002
WR12
<Note 3>
Foil side
<Note 4>
Supporting
tape side
<Note 3>
WR14
WR8
17
(S5)
19
(S5)
18
(S5)

1-8
1.8 SERVICE POSITIONS
The servicing locations for use in troubleshooting or servic-
ing of the set are provided separately for the VHS and DV.
ISERVICE POSITIONS <VHS SIDE>
II SERVICE POSITIONS <DV SIDE>
1.8.1 Service position <VHS SIDE>
<Removal>
(1) Remove the top cover and bracket.
(2) Remove the front panel assembly.
(3) Remove the MAIN board assembly together with the
mechanism assembly.
Fig. No. Screw Hook, etc. Connector Note
(Page)
(1) Top cover, COM1 9 2 + 1 0—
Bracket (1-3) (No.1-9) (L1,2)
(2) Front COM2 0 8 2
panel (1-3) (L3) (CN7507/ —
assembly CN3011)
(3) Main V2, V3 13 0 5
board (1-6) (No.4-16) (CN5321/
assembly CN5322/
(etc.) CN3014/ —
CN703/
CN2601)
A
1
2
6
7
3
4
5
B
E
Front panel assembly
PATCH CORD
PTU94017B
CN7507
Main board assembly
CN3011
CN3014
CN703
CN2601
CN7508
CN7509
CN5322
CN5321
CN3701
CN3501
C
D
CN1002
Fig. 1-8-1 Service position <VHS side>
Table 1-8-1
< Installation >
(1) Stand up the bottom chassis assembly so that the DV/
Regulator side is in the lower position.
(2) Connect the PATCH CORD to the three FPCs then con-
nect CN3014, CN7508 and CN7509.
(3) By connecting a total of two FPCs and wires (CN703/
CN2601), carry out the installation so that the Main board
assembly comes in the upper position.
Point: •Take care that the FPCs and wires are not
subjected to stress in this positioning.
(4) Connect the PATCH CORDS to the two FPCs of the front
panel assembly, then connect the CORDS to the
CN7507/CN3011.
For the PATCH CORD is required, see Table 1-8-3.

1-9
1.8.2 Service position <DV SIDE>
<Removal>
(1) Remove the top cover and bracket.
(2) Remove the front panel assembly.
(3) Remove the mechanism assembly (DV side) together
with the base (2).
(4) Remove the DV Main board assembly.
Note:
•
Place an insulation sheet on the mechanism assembly
(VHS side), then remove the DV Main board assembly
and place it on the insulation sheet.
When removing the DV Main board assembly, only re-
move a connector CN1002 out of four.
Take care not to damage the parts during operating.
Table 1-8-2
SYMBOL CONNECTOR (WIRE) CONNECTIONS PIN No PATCH CORD
I / II 1 MAIN CN7507 —JACK CN7002 16 A
I/ II 2 MAIN CN3011 —DISPLAY CN7001 18 B
I3 MAIN CN703 —DV MAIN CN3501 6 —
I4 MAIN CN7508 —REGULATOR CN5322 13 C
I5 MAIN CN7509 —REGULATOR CN5321 15 D
I6 MAIN CN2601 —DV MAIN CN3701 8 —
I/ II 7 MAIN CN3014 —DV MAIN CN1002 6 E
II 8 DV MAIN CN1502 —SENSOR 15 F
II 9 P/R MDA CN5002 —DV MAIN CN2001 26 G
II 10 P/R MDA CN5506 —DV MAIN CN1501 20 H
II 11 REGULATOR CN5324 —P/R MDA CN5501 5 —
Board to Board Wire
APTU94022-16 QUQ112-1840CG
BPTU94022-18 QUQ112-1640CG
CPTU94022-13 QUQ212-1340CG
DPTU94022-15 QUQ212-1540CG
EYTU94072-06 QUQ210-0640CG
FYTU94074-15 QUQ105-1540AA
GYTU94074-26 QUQ105-2640AA
HYTU94074-20 QUQ105-2040AA
Table 1-8-3
< Installation >
For the PATCH CORDS, see Table 1-8-3.
The patch cords that are indicated in Table 1-8-3 are in one
package.
(1) Connect a PATCH CORD to the FPC, and connect the
end to the connector CN1002.
(2) Connect PATCH CORDS to the three connectors/FPCs
(CN5506/CN5002/CN1502).
(3) Place the mechanism assembly (DV side) on the origi-
nal position and connect the four wires/FPCs/connectors
(CN5501/CN5506/CN5002/CN1502).
(4) Connect PATCH CORDS to the two FPCs of the FRONT
PANEL ASSEMBLY, and connect the ends to the
CN7507 and CN3011.
Table 1-8-4 Connection of Connectors
Fig. No. Screw Hook, etc. Connector Note
(Page)
(1) Top cover, COM1 9 2 + 1 0 —
Bracket (1-3) (No.1-9) (L1,2)
(2) Front COM2 0 8 2
panel (1-3) (L3) (CN7507/ —
assembly CN3011)
(3) Mechanism D1 4 0 4
(DV SIDE)/ (1-7) (No.1-4) (CN1502/
BASE (2) CN5002/ —
CN5506/
CN5501)
(4) DV Main D6 4 0 1 Note
board (1-8) (No.17-20) (CN1002)
assembly
Fig. 1-8-2 Service position <DV side>
B
A
8
2
1
7
9
F
10
7
11
H
G
Insulation sheet
DV Main board
assembly
CN7507
CN1501 CN1502
CN5506
CN5002
CN5501
CN3011
BASE (2)
DV mechanism
assembly
Front panel assembly
PATCH CORD
PTU94017B
E
CN2001
CN1002

1-10
1.9 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”.
1.9.1 How to set the "MECHANISM SERVICE MODE"
(1) Disconnect VCR from AC.
(2) Connect TPGND and TP7001 (TEST) on the Display
board assembly with a jump wire.
(3) Connect VCR to AC.
(4) Press the POWER button.
Fig. 1-9-1
(5) With lock levers A B 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 A B , refer to the “Pro-
cedures for Lowering the Cassette holder assembly” on
page 1-5 of 1.6 HOW TO REMOVE THE MAJOR PARTS
<VHS section>
(6) The cassette holder lowers and, when the loading has
completed, the mechanism enters the desired mode.
Main board assembly
Terminal board assembly
S-Sub
board assembly
3D Digital
/2M board
assembly
Demodulator
board
assembly
VR401
D/A
LEVEL ADJ
Fan
Swithing regulator
board assembly
Regulator
board assembly
TP GND
TP701
D AGC
VR701
DV AGC
On screen
board assembly
DV Main
board assembly
Display board assembly Jack board assembly
Eject SW board assembly
Jog board
assembly
LED SW
board assembly
TPGND
TP7001
TEST
P/R MDA
board assembly
TP106
PB FM
TP4001
CTL.P
TP111
D.FF
TP2253
A.PB FM
DV mechanism VHS mechanism
Supporting
tape side
CN3011 CN7507
PATCH COAD
PTU94022-18
QUQ112-1840CG
PATCH COAD
PTU94022-16
QUQ112-1640CG
<Front panel assembly>

1-11
1.10 CONNECTION
Fig. 1-10-1 Top view
TOP VIEW
Treat the wire so as not to come to
DV cassette housing when attaching
the Front panel assembly.
Absorb the looseness
of the 13 ,
14 wires in
the Main part.
Fix the wire by
Style pin surely.
Foil side
Supporting
tape side
Supporting
tape side
Supporting
tape side
Supporting
tape side
Supporting
tape side
Make a
crease.
Make a
crease.
Make a crease.
A
C
CN5325
CN5321 CN5322
CN5301
(Lower)CN5201
CN703
CN7506
CN512
CN7508
CN2601
CN3001
CN2001
CN1
CN1
CON1
CN7509
CN3014
6
3
14
16 17
4
9
5
87
12
13
24
11
18
22
20
19 23
15
12
21
10
Foil side
Foil side
Foil side
Foil side
Foil side
Foil side
Foil side
Foil side
Foil side
Foil side
A/C HEAD
DRUM
Treat the wire
according to the
figure not to
overlap in TP.
Make a crease.
Supporting
tape side
B
Should be confirmed that wire
not touch to IC of the Stator
board assembly.
After attach the Mechanism assembly,
treat the wire according to the figure.
The
21 , 22 wires
should be treat under the
P/R MDA board assembly.
CN1502
CN3501
CN1101
CN3701
CN1001
CN5505
CN5503
CN5504 CN5507
CN5506 CN5501
CN5502
CN5001
CN5002
CN2001
CN5323
(Middle)
CN5324
(Upper)
CN3011 CN7507
CN1501
CN1002
CN1 CN3014
CN3011
CN7507
B
DRUM
Main board
assembly
Main board
assembly
Main board
assembly
Chassis
Absorb the looseness of
the wire in the B part.
Treat the front wires
according to the figure.
Treat the wire
through the hole.
DETALE "B"
DETALE "A" DETALE "C"
Base(1)
[CAUTION]
Insert the FPC wires as shown below.
Foil side Supperting tape side side

1-12
Fig.
Connection Type
No.
Symbol
Connected point ←→ Connected point Pin No. (FPC/
WIRE)
1 WR1 MAIN CN7507 ←→ JACK CN7002 16 FPC
2 WR2 MAIN CN3011 ←→ DISPLAY CN7001 18 FPC
3 WR3 REGULATOR CN5301 ←→ SW REG CN5201 19 FPC
4 WR4 REGULATOR CN5322 ←→ MAIN CN7508 13 FPC
5 WR5 REGULATOR CN5321 ←→ MAIN CN7509 15 FPC
6 WR6 REGULATOR CN5325 ←→ FAN MOTOR –2 WIRE
7 WR7 REGULATOR CN5324 ←→ PRE/REC MDA CN5501 5 WIRE
8 WR8 REGULATOR CN5323 ←→ DV MAIN CN1001 10 WIRE
9 WR9 DRUM MOTOR CON1 ←→ MAIN CN3001 5 FPC
10 WR10 MAIN CN1 ←→ UPPER DRUM –13 FPC
11 WR11 A/C HEAD CN1 ←→ MAIN CN2001 7 FPC
12 WR12 MAIN CN3014 ←→ DV MAIN CN1002 6 FPC
13 WR13 MAIN CN703 ←→ DV MAIN CN3501 6 WIRE
14 WR14 MAIN CN2601 ←→ DV MAIN CN3701 8 FPC
15 WR15 DV MAIN CN1502 ←→ SENSOR –15 FPC
16 WR16 PRE/REC MDA CN5002 ←→ DV MAIN CN2001 26 FPC
17 WR17 PRE/REC MDA CN5506 ←→ DV MAIN CN1501 20 FPC
18 WR18 PRE/REC MDA CN5507 ←→ DV HOUSING MOTOR –4 WIRE
19 WR19 PRE/REC MDA CN5502 ←→ DV LOADING MOTOR –2 WIRE
20 WR20 PRE/REC MDA CN5505 ←→ DV ENCODER –4 WIRE
21 WR21 PRE/REC MDA CN5503 ←→ DV DRUM MOTOR –11 FPC
22 WR22 PRE/REC MDA CN5504 ←→ DV CAPSTAN MOTOR –18 FPC
23 WR23 PRE/REC MDA CN5001 ←→ DV VIDEO HEAD –10 FPC
24 –MAIN CN7506 ←→ S-SUB CN512 14 FPC
–– DV MAIN CN1101 ←→ Jig CONN. CABLE –26 –
Table 1-10-1 Connection

1-13
1.11 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 emer-
gency 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 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. 1-11-1 Jig RCU [PTU94023B]
Note:
[DV]
For the emergency content, see “1.11.3 Emergency con-
tent description”.
[VHS]
For the emergency content, see “1.11.3 Emergency con-
tent description”.
(2) Transmit the code “59”from the Jig RCU again.
The FDP shows the emergency detail information 1 in 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 “1.11.4
Emergency detail information
1 ”.
(3) Transmit the code “59”from the Jig RCU once again.
The FDP shows the emergency detail information 2 in 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 “1.11.5 Emer-
gency detail information
2 ”.
(4) Transmit the code “59”from the Jig RCU once again to re-
set the display.
1.11.2 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 : ––:
––
1.11.1 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)
FDP display switching
[DV]
[VHS]
FDP display –: –– : –– Normal display
E : ** :
**
Emergency content display
(E:Latest:Previous)
E : ** :
**
Emergency content display
(E:Latest:Previous)

1-14
1.11.3 Emergency content description
Note:
Emergency contents “E08/E09”are for the model with Dynamic Drum (DD).
Table 1-11-1
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.
1 The absolute value sensor is defective. (The soldered parts have separated.)
2 The pull-up resistor at the absolute sensor output is defective. (The soldered parts
have separated.)
3 Contact 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.
1 The FG sensor is defective. (The soldered parts have separated.)
2 The pull-up resistor at the FG sensor output is defective. (The soldered parts have
separated.)
3 Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor.
4 The power to the sensor is not supplied. (Connection failure/soldering failure)
5 The FG pulse is not sent to the System Controller CPU.
6
The tilt motor is defective. (The soldered parts have separated.)
7 The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)
8 The tilt motor drive MDA - IC is defective.
9 Auto-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.
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
E08: DD Initialized
(Absolute
Position
Sensor)
EMG
E09: DD FG EMG

1-15
1.11.4 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)