JVC HR-J3009UM User manual

SERVICE MANUAL
No.82903
January 2002
HR-J3009UM/HR-J4009UM
VIDEO CASSETTE RECORDER
SPECIFICATIONS (The specifications shown pertain specifically to the model HR-J4009UM.)
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
AUDIO
POWER CH
REC
TV/VCR TIMER REC POWER
REW
PLAY
FF
STOP/EJECT
VIDEO
MENU
REC
REW FF
CH(AUX)
ENTER
12 3
456
7
0
89
SET
–
TV/VCR TIMER
SP/EP DISPLAY
CANCEL
C.RESET
TV CH
TVVOL
INPUT
+
–
+
–
+
–
+
PAUSE
PLAY
STOP
TV POWER
POWER
GENERAL
Power requirement
Power consumption
Power on
Power off
Temperature
Operating
Storage
Operating position
Dimensions (W x H x D)
Weight
Format
Maximum recording time
SP
EP
VIDE O/AUDIO
Signal system
Recording/Playback
system
Signal-to-noise ratio
Horizontal resolution
Frequency range
Normal audio
Input/Output
TUNER
Tuning system
Channel coverage
VHF
UHF
CA T V
R F output
TIMER
Clock reference
Program capacity
Memory backup for timer
ACCESSO RIES
Provided accessories
Specifications shown are for S P mode unless specified otherwise.
E. & O.E. Design and specifications subject to change without notice.
: AC 110 V-220 V~, 50Hz/60 Hz
:9 W
: 2.0 W
:5°C to 40°C (41°F to 104°F)
:–20°C to 60°C
(–4°F to140°F)
: Horizontal only
: 360 mm x 95 mm x 224 mm
: 3.2 kg
: VHS NTSC standard
: 210 min. with ST -210 video cassette
: 630 min. with ST -210 video cassette
: NTSC-type color signal and
E IA monochrome signal, 525 lines/60 fields
: DA-4
(Double Azimuth) head helical scan system
: 42 dB
: 230 lines
: 100 Hz to 10,000 Hz
:
RC A connectors (IN x 1, OUT x 1)
: Frequenc y-synthesized tuner
: Channels 2–13
: Channels 14–69
: 113 Channels
: Channel 3 or 4 (switchable; preset to
Channel 3 when shipped) 75 ohms,
unbalanced
: Quartz
: 1-month programmable timer/8 programs
: Approx. 18 hours
: R F cable (F-type),
Infrared remote control unit,
“AAA” battery x 2, Conversion plug
HR-J3009UM/J4009UM V15C1P/V15C1

TABLE OF CONTENTS
Section Title Page Section Title Page
Important Safety Precautions
INSTRUCTIONS
DISASSEMBLY INSTRUCTION
1.REMOVAL OF MECHANICAL PARTS AND
P.C.BOARDS ..................................................................1-1
1-1 TOP CABINETAND FRONT CABINET ..................1-1
1-2 FLAP .......................................................................1-1
1-3 DECK CHASSIS .....................................................1-1
1-4 SYSCON PCB.........................................................1-1
2.REMOVAL OF DECK PARTS .........................................1-2
2-1 TOP BRACKET .......................................................1-2
2-2 CASSETTE HOLDER ASS’Y ..................................1-2
2-3 CASSETTE SIDE L/R .............................................1-2
2-4 LINK UNIT ...............................................................1-2
2-5 LINK LEVER/FLAP LEVER.....................................1-2
2-6 LOADING MOTOR/WORM .....................................1-3
2-7 TENSION ASS’Y .....................................................1-3
2-8 T BRAKE ARM/T BRAKE BAND .............................1-4
2-9
S REEL/T REEL/IDLERARM ASS’Y/IDLER GEAR ........ 1-4
2-10 CASSETTE OPENER/PINCH ROLLER
BLOCK/P5 ARM ASS’Y...........................................1-5
2-11 A/C HEAD ...............................................................1-5
2-12 FE HEAD(RECORDER ONLY) ...............................1-5
2-13 AHC ASS’Y/CYLINDER UNIT ASS’Y......................1-5
2-14 CAPSTAN DD UNIT ................................................1-6
2-15
MAIN CAM/PINCH ROLLER CAM/JOINT GEAR ............ 1-6
2-16
LOADING GEAR S/T UNIT.............................................. 1-6
2-17
CLUTCH ASS’Y/RING SPRING/
CLUTCH LEVER/CLUTCH GEAR ...................................
1-7
2-18
CASSETTE GUIDE POST/
INCLINED BASE S/T UNIT/P4 CAP ................................
1-7
3.
REMOVALAND INSTALLATION OF FLAT PACKAGE IC ........ 1-8
REMOVAL........................................................................1-8
INSTALLATION ................................................................1-9
KEY TO ABBREVIATIONS .............................................1-10
PREVENTIVE CHECKS AND SERVICE INTERVALS....1-12
CLEANING......................................................................1-12
SERVICE MODE LIST.....................................................1-13
SERVICING FIXTURES AND TOOLS.............................1-13
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE....... 1-13
MECHANICAL ADJUSTMENTS
TAPE REMOVAL METHODAT NO POWER SUPPLY ....1-14
1.CONFIRMATION AND ADJUSTMENT .........................1-14
1-1 CONFIRMATION AND ADJUSTMENT OF
TENSION POST POSITION .................................1-14
1-2 CONFIRMATION OF PLAYBACK TORQUEAND
BACK TENSION TORQUE DURING PLAY BACK..1-14
1-3 CONFIRMATION OF VSR TORQUE ....................1-14
1-4 CONFIRMATION OF REEL BRAKE TORQUE .....1-15
2.CONFIRMATION AND ADJUSTMENT OF
TAPE RUNNING MECHANISM ....................................1-15
2-1 GUIDE ROLLER ...................................................1-15
2-2 CONFIRMATION AND ADJUSTMENT OF
AUDIO/CONTROL HEAD .....................................1-16
2-3
TAPE RUNNING ADJUSTMENT(X-VALUE ADJUSTMENT) ... 1-16
ELECTRICAL ADJUSTMENTS
1.BASIC ADJUSTMENT ..................................................1-17
1-1 SWITCHING POINT..............................................1-17
ELECTRICALADJUSTMENT PARTS LOCATION GUIDE ........ 1-17
IC DESCRIPTIONS .........................................................1-18
SERVO TIMING CHART .................................................1-21
MECHANISM TIMING CHART........................................1-22
TROUBLESHOOTING GUIDE
POWER DOES NOT TURN ON .............................................. 1-23
POWER SHUTS OFF ....................................................1-24
CYLINDER NOT ROTATING DURING PLAYBACKAND RECODRDING.. 1-26
CASSETTE IN AND DOWN, UNIT HAS NO FUNCTIONS ..... 1-26
FF/REW DO NOT WORK ..............................................1-27
AUDIO SHAKES ............................................................1-27
CASSETTE TAPE IS NOT ACCEPTED.........................1-28
WHEN INSERTING CASSETTE, IT EJECTS IMMEDIATELY .. 1-30
TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY.. 1-32
CAPSTAN DD MOTOR NOT ROTATING ......................1-33
PLAYBACK PICTURE JITTERS HORIZONTALLY ........1-34
PLAYBACK PICTURE SHAKES ....................................1-34
AUTO TRACKING DOES NOT OPERATE ....................1-35
WHEN PLAYBACK, FAST FORWARD OR REWIND MODE ISACTIVATED,
UNIT STOPS IMMEDIATELY
.....................................................1-35
PLAYBACK PICTURE JITTERS VERTICALLY .............1-36
NO PLAYBACK PICTURE .............................................1-37
NO PICTURE DURING PLAYBACK ..............................1-38
NO COLOR DURING SELF RECORDING AND PLAYBACK . 1-38
PLAYBACK PICTURE NOISY(EVEN AFTER CLEANING HEADS) ... 1-39
NO NORMALAUDIO ON PLAYBACK ...........................1-40
AUDIO CAN NOT BE RECORDED ...............................1-41
RECORDING MECHANISM WORKS,
BUT NO VIDEO RECORDED FROM INPUTJACK OR TUNER ..
1-42
NO E-E(NO VIDEO FROM TUNER)..............................1-43
NO E-E AUDIO(MONO) .................................................1-44
NO TUNER AUDIO(MONO)...........................................1-45
CHARTS AND DIAGRAMS
INTERCONNECTION DIAGRAM [HR-J3009UM]..............2-1
Y/C/AUDIO/CCD/HEADAMP SCHEMATIC DIAGRAM [HR-J3009UM] ... 2-3
SYSTEM CONTROL/SERVO SCHEMATIC DIAGRAM [HR-J3009UM]... 2-5
POWER SCHEMATIC DIAGRAM [HR-J3009UM] .............2-7
TUNER SCHEMATIC DIAGRAM [HR-J3009UM] ................ 2-9
OPERATION SCHEMATIC DIAGRAM [HR-J3009UM] ......... 2-11
SYSCON CIRCUIT BOARD(INSERTED PARTS) [HR-J3009UM] .. 2-13
SYSCON CIRCUIT BOARD(CHIP MOUNTED PARTS) [HR-J3009UM] ... 2-15
WAVEFORMS [HR-J3009UM] .........................................2-18
Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM [HR-J3009UM] ... 2-19
SYSTEM CONTROL/SERVO BLOCK DIAGRAM [HR-J3009UM] ... 2-21
TUNER BLOCK DIAGRAM [HR-J3009UM] .....................2-23
OPERATION BLOCK DIAGRAM [HR-J3009UM] ............2-25
INTERCONNECTION DIAGRAM [HR-J4009UM]............2-27
Y/C/AUDIO/CCD/HEADAMP SCHEMATIC DIAGRAM [HR-J4009UM] 2-29
SYSTEM CONTROL/SERVO SCHEMATIC DIAGRAM [HR-J4009UM] 2-31
POWER SCHEMATIC DIAGRAM [HR-J4009UM] ...........2-33
TUNER SCHEMATIC DIAGRAM [HR-J4009UM] .............. 2-35
OPERATION SCHEMATIC DIAGRAM [HR-J4009UM] .........2-37
SYSCON CIRCUIT BOARD(INSERTED PARTS) [HR-J4009UM] .. 2-39
SYSCON CIRCUIT BOARD(CHIP MOUNTED PARTS) [HR-J4009UM] ... 2-41
WAVEFORMS [HR-J4009UM] .........................................2-44
Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM [HR-J4009UM] ... 2-45
SYSTEM CONTROL/SERVO BLOCK DIAGRAM [HR-J4009UM] ... 2-47
TUNER BLOCK DIAGRAM [HR-J4009UM] .....................2-49
OPERATION BLOCK DIAGRAM [HR-J4009UM] ............2-51
PARTS LIST
3.1 PACKING AND ACCESSORY ASSEMBLY <M1> .....3-1
3.2 FINALASSEMBLY <M2> [HR-J3009UM].................3-2
3.3 FINALASSEMBLY <M2> [HR-J4009UM].................3-3
3.4 MECHANISM ASSEMBLY <M4>...............................3-4
3.5 ELECTRICAL PARTS LIST [HR-J3009UM]...............3-7
SYSCON BOARD ASSEMBLY <03> [HR-J3009UM] ... 3-7
3.6 ELECTRICAL PARTS LIST [HR-J4009UM].............3-10
SYSCON BOARD ASSEMBLY <03> [HR-J4009UM] .. 3-10
Reference..........................................................................4-1
GENERAL SPECIFICATIONS [HR-J3009UM] ..................4-1
GENERAL SPECIFICATIONS [HR-J4009UM] ..................4-7
HR-J3009UM HR-J4009UM
POWER VOLTAGE 120 V 60 Hz 110-220 V 50/60 Hz
TIMER BACK-UP (at Power off mode) 5 second 18 Hours
The following table lists the differing points between Models HR-J3009UM and HR-J4009UM.
MODEL
ITEM

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
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and com-
ply with these and other cautionary notices appearing in the
operation and service 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
compliance 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
transformer primary lead wires are performed using crimp type
connectors, if replacing the connectors is unavoidable, in or-
der 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.
1
v
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

v 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 compli-
ance with safety standards.
1. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and
externally 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
accessible 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 accessi-
ble 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.
d'
d
Chassis
Power cord,
primary wire
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z)
Z 0.1 ohm
Z 0.5 ohm
≤
≤
AC inlet
Earth pin
Exposed accessible part
Milli ohm meter
Grounding Specifications
Fig. 10
ab
c
V
Externally
exposed
accessible part
Z
Fig. 9
Fig. 8
Clearance Distance (d), (d')
d, d' 3 mm
d, d' 4 mm
d, d' 3.2 mm
1 MΩR 12 MΩ/500 V DC
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Japan
USA & Canada
Europe & Australia R 10 MΩ/500 V DC
Region
Insulation Resistance (R)
R 1 MΩ/500 V DC
≤
≤
≥≥
≤
≤
≤≤
≤
≤
AC 3 kV 1 minute
(Class 2)
AC 1.5 kV 1 minute
(Class 1)
d 4 mm
d' 8 mm (Power cord)
d' 6 mm (Primary wire)
Table 1 Specifications for each region
a, b, cLeakage Current (i)AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Japan
USA & Canada
i 1 mA rms Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
i 0.5 mA rms
i 0.7 mA peak
i 2 mA dc
i 0.7 mA peak
i 2 mA dc
Europe & Australia
Region Load Z
≤
≤
≤
≤
≤
≤
1 kΩ
2 kΩ
1.5 kΩ
0.15 µF
50 kΩ
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.
2S40888-01

DISASSEMBLY INSTRUCTIONS
1
1
1
Deck Chassis
Bottom Plate
1.
1-1:
1
1
2
Top Cabinet
Front Cabinet
Fig. 1-1
REMOVAL OF MECHANICAL PARTS
AND P.C. BOARDS
TOP CABINET AND FRONT CABINET
(Refer to Fig. 2-1)
1.
2.
3.
4.
Remove the 4 screws 1.
Remove the Top Cabinet in the direction of arrow (A).
Unlock the 7 supports 2.
Remove the Front Cabinet in the direction of arrow (B).
1-2: FLAP (Refer to Fig. 1-2)
1.
2.
Open Flap to 90˚ and flex in direction of arrow (A), at the
same time slide in direction of arrow (B).
Then lift in direction of arrow (C).
1-3: DECK CHASSIS (Refer to Fig. 1-3)
1.
2.
3.
Remove the 3 screws 1.
Disconnect the following connectors: (CP1001, CP4001,
CP4002 and CP4003).
Remove the Deck Chassis in the direction of arrow.
Fig. 1-2
Fig. 1-3
(A)
Flap
(B)
(C)
1
1
(A)
2
2
2
2
2
2
(B)
1-4: SYSCON PCB (Refer to Fig. 1-4)
1.
2.
3.
Remove the screw 1.
Remove the screw 2.
Remove the Syscon PCB in the direction of arrow.
Fig. 1-4
1
2
Syscon PCB
Bottom Plate
Washer
Washer
Washer
CP1001
CP4001CP4002
CP4003
1-1

DISASSEMBLY INSTRUCTIONS
2. REMOVAL OF DECK PARTS
2-1: TOP BRACKET (Refer to Fig. 2-1)
Extend the 2 supports 1.
Slide the 2 supports 2and remove the Top Bracket.
1.
2.
NOTE
After the installation of the Top Bracket, bend the support
1so that the Top Bracket is fixed.
1.
11
2
2
Top Bracket
Main Chassis
Top Bracket
Main Chassis
Fig. 2-1
1.
2.
3.
2-2: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-2)
Move the Cassette Holder Ass'y to the front side.
Push the Locker R to remove the Cassette Side R.
Remove the Cassette Side L.
Fig. 2-2
Link Unit Main Chassis
Main Chassis
Cassette Side L
Cassette Side R
Locker R
1.
2.
3.
2-3: CASSETTE SIDE L/R (Refer to Fig. 2-3-A)
Remove the Locker Spring.
Unlock the 4 supports 1and then remove the Cassette
Side L/R.
Unlock the support 2and then remove the Locker R.
Locker Spring
Cassette Side L
Cassette Side R
Locker R
Cassette Holder
1
1
1
1
2
In case of the Locker R installation, check if the two
positions of Fig. 2-3-B are correctly locked.
When you install the Cassette Side R, be sure to move
the Locker R after installing.
NOTE
1.
2.
Locker R
Check if these
positions are locked.
Cassette Side R
Fig. 2-3-B
2-4: LINK UNIT (Refer to Fig. 2-4)
1.
2.
3.
Set the Link Unit to the Eject position.
Unlock the support 1.
Remove the (A) side of the Link Unit first, then remove
the (B) side.
Fig. 2-4
(A)
Link Unit
Main Chassis
(B)
Link Unit
Main Chassis
Fig. 2-3-A
2-5: LINK LEVER/FLAP LEVER (Refer to Fig. 2-5)
1.
2.
3.
Extend the support 1.
Remove the Link Lever.
Remove the Flap Lever.
Fig. 2-5
Link Lever
Flap Lever
1
1-2

DISASSEMBLY INSTRUCTIONS
2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A)
1.
2.
3.
Remove the screw 1.
Remove the Loading Motor.
Remove the Worm.
Fig. 2-6-A
Loading Motor
Worm
• Screw Torque: 3 ±0.5kgf•cm
Main Chassis
1
NOTE
1.
2.
In case of the Worm installation, check if the value of the
Fig. 2-6-B is correct.
In case of the Loading Motor installation, hook the wire
on the Cassette Opener as shown Fig. 2-6-C.
Fig. 2-6-B
19.2 ±0.1mm
Safety surface for pressing
of the insert.
2-7: TENSION ASS’Y (Refer to Fig. 2-7-B)
1.
2.
3.
4.
5.
6.
Turn the Pinch Roller Cam clockwise so that the Tension
Holder hook is set to the position of Fig. 2-7-A to move
the Tension Arm Ass’y.
Remove the Tension Spring.
Unlock the 2 supports 1and remove the Tension Band.
Unlock the support 2and remove the Tension Arm Ass’y.
Unlock the support 3and remove the Tension Connect.
Float the hook 4and turn it clockwise then remove the
Tension Holder.
Fig. 2-6-C
Loading Motor
Cassette Opener
Fig. 2-7-B
Tension Band
Tension Connect
Tension Spring Tension Arm Ass’y
Tension Holder
1
1
3
2
4
NOTE
1.
2.
3.
In case of the Tension Band installation, note the direc-
tion of the installation. (Refer to Fig. 2-7-C)
In case of the Tension Band installation, install correctly
as Fig. 2-7-D.
In case of the Tension Connect installation, install as the
circled section of Fig. 2-7-E.
Fig. 2-7-C
Tension Band
Tension Connect
Fig. 2-7-D
[OK]
[NG]
Tension Connect
Tension Band
Tension Connect Tension Band
Fig. 2-7-E
Tension Connect
Main Chassis
Tension Arm Ass’y
Fig. 2-7-A
1-3

DISASSEMBLY INSTRUCTIONS
2-8: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A)
Remove the T Brake Spring.
Turn the T Brake Arm clockwise and bend the hook
section to remove it.
Unlock the 2 supports 1and remove the T Brake Band.
1.
2.
3.
Fig. 2-8-A
T Brake Band
Hook section
T Brake Arm
T Brake Spring
1
1
NOTE
1. In case of the T Brake Band installation, install correctly
as Fig. 2-8-B.
Fig. 2-8-B
[OK]
[NG]
T Brake Arm
T Brake Band
T Brake Arm
T Brake Band
2-9: S REEL/T REEL/IDLER ARM ASS’Y/IDLER GEAR
(Refer to Fig. 2-9-A)
1.
2.
3.
Remove the S Reel and T Reel.
Remove the 2 Polyslider Washers 1.
Remove the Idler Arm Ass’y and Idler Gear.
NOTE
1.
2.
3.
4.
5.
6.
Take care not to damage the gears of the S Reel and T
Reel.
The Polyslider Washer may be remained on the back of
the reel.
Take care not to damage the shaft.
Do not touch the section “A” of S Reel and T Reel. (Use
gloves.) (Refer to Fig. 2-9-A) Do not adhere the stains
on it.
When you install the reel, clean the shaft and grease it
(FG-84M). (If you do not grease, noise may be heard in
FF/REW mode.)
After installing the reel, adjust the height of the reel.
(Refer to MECHANICAL ADJUSTMENT)
Fig. 2-9-A
Idler Gear
Idler Arm Ass’y
S Reel
T Reel
(A)
1
1
(A)
NOTE
1.
2.
In case of the S Reel and T Reel installation, check if the
correct parts are installed. (Refer to Fig. 2-9-B)
In case of the Idler Arm Ass’y installation, install correctly
as Fig. 2-9-C. And also set it so that the section “B” of
Fig. 2-9-A is placed under the Main Chassis tab.
Fig. 2-9-B
Big Hole
(S Reel) Small Hole (T Reel)
Fig. 2-9-C
[OK]
[NG]
Clutch Gear Idler Arm Ass’y
Idler Arm Ass’y
Clutch Gear
(B)
1-4

DISASSEMBLY INSTRUCTIONS
2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/P5
ARM ASS’Y (Refer to Fig. 2-10-A)
1.
2. Unlock the support 1and remove the Cassette Opener. Remove the Pinch Roller Block and P5 Arm Ass’y.
Fig. 2-10-A
Cassette Opener
1
Pinch Roller Block
P5 Arm Ass’y
Main Chassis
NOTE
1.
2. Do not touch the Pinch Roller. (Use gloves.) In case of the Pinch Roller Block and the Pinch Roller
Cam installation, install correctly as Fig. 2-10-B.
Fig. 2-10-B
Pinch Roller Block Can be seen the hole of
the Pinch Roller Cam.
P5 Arm Ass’y
Can be seen the hole of the
Main Cam.
2-11: A/C HEAD (Refer to Fig. 2-11-A)
1.
2.
3.
4.
Remove the screw 1.
Remove the A/C Head Base.
Remove the 3 screws 2.
Remove the A/C Head and A/C Head Spring.
NOTE
1.
2.
3.
Do not touch the A/C Head. (Use gloves.)
When you install the A/C Head Spring, install as shown in
Fig. 2-11-B.
When you install the A/C Head, tighten the screw (1) first,
then tighten the screw (2), finally tighten the screw (3).
Fig. 2-11-A
(1)
2
A/C Head
A/C Head Spring
A/C Head Base
• Screw Torque: 5 ±0.5kgf•cm (Screw 1)
2
2
(3)
(2)
1
Fig. 2-11-B
Spring Position
2-12: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12)
1.
2. Remove the screw 1. Remove the FE Head.
Fig. 2-12
1
FE Head
• Screw Torque: 5 ±0.5kgf•cm
• The FE Head is not installed on the Video Cassette Player.
2-13: AHC ASS’Y/CYLINDER UNIT ASS’Y
(Refer to Fig. 2-13)
1.
2.
3.
Disconnect the following connector:
(CD2001)
Remove the 3 screws 1.
Remove the Cylinder Unit Ass’y.
NOTE
1. When you install the Cylinder Unit Ass’y, tighten the
screws from (1) to (3) in order while pulling the Ass’y
toward the left front direction.
Fig. 2-13
Cylinder Unit Ass’y
1
(1)
• Screw Torque: 3 ±0.5kgf•cm
1
1
(2)
(3)
CD2001
1-5

DISASSEMBLY INSTRUCTIONS
2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14-A)
1.
2.
3.
Remove the Capstan Belt.
Remove the 3 screws 1.
Remove the Capstan DD Unit.
Fig. 2-14-A
Capstan Belt
Capstan DD Unit
• Screw Torque: 4 ±0.5kgf•cm
1
11
2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR
(Refer to Fig. 2-15-A)
1.
2. Remove the E-Ring 1, then remove the Main Cam. Remove the E-Ring 2, then remove the Pinch Roller
Cam and Joint Gear.
Fig. 2-15-A
1
Main Cam
Pinch Roller Cam
Joint Gear
2
NOTE
1. In case of the Pinch Roller Cam and Main Cam installa-
tion, install them as the circled section of Fig. 2-15-B so
that the each markers are met. (Refer to Fig. 2-15-B)
And also can be seen the Main Chassis hole through the
Main Cam maker hole.
Fig. 2-15-B
Pinch Roller Cam
Marker
Main Cam
2-16: LOADING GEAR S/T UNIT (Refer to Fig. 2-16-A)
1.
2.
Remove the E-Ring 1and remove the Main Loading
Gear.
Remove the Main Rod, Tension Lever, Loading Arm S
Unit and Loading Arm T Unit.
1
Main Loading Gear
Main Rod
Tension Lever Loading Arm T Unit
Loading Arm S Unit
Fig. 2-16-A
NOTE
1. In case of the Capstan DD Unit installation, apply the
silicon bond (TSE3843-W) on the position Fig. 2-14-B
correctly. (If no silicon bond applied, abnormal noise will
be heard on the deck operation.)
(Refer to Fig. 2-14-B, C)
Fig. 2-14-B
Applied position of
silicon bond
Be careful not to apply the silicon
bond to the Pinch Roller.
Fig. 2-14-C
Silicon Bond
Main Chassis
Capstan DD Unit
1-6

DISASSEMBLY INSTRUCTIONS
1
Clutch Ass’y
Ring Spring
Clutch Lever
Coupling Gear
Coupling Spring
Clutch Gear
NOTE
1. When you install the Loading Arm S Unit, Loading Arm T
Unit and Main Loading Gear, align each marker. (Refer to
Fig. 2-16-B)
Fig. 2-16-B
Marker
Main Loading Gear
Loading Arm T Unit Loading Arm S Unit
Marker
2-17: CLUTCH ASS’Y/RING SPRING/CLUTCH LEVER/
CLUTCH GEAR (Refer to Fig. 2-17-A)
1.
2.
3.
4.
Remove the Polyslider Washer 1.
Remove the Clutch Ass’y and Ring Spring.
Remove the Clutch Lever.
Remove the Coupling Gear, Coupling Spring and Clutch
Gear.
Fig. 2-17-A
NOTE
1. In case of the Clutch Ass’y installation, install it with
inserting the spring of the Clutch Ass’y into the dent of the
Coupling Gear. (Refer to Fig. 2-17-B)
Fig. 2-17-B
Clutch Ass’y
Coupling Gear
2-18: CASSETTE GUIDE POST/INCLINED BASE S/T
UNIT/P4 CAP (Refer to Fig. 2-18-A)
1.
2.
3.
Remove the P4 Cap.
Unlock the support 1and remove the Cassette Guide
Post.
Remove the Inclined Base S Unit and Inclined Base T
Unit.
Fig. 2-18-A
Cassette Guide Post
Inclined Base S
Unit Inclined Base T
Unit
P4 Cap
1
NOTE
1.
2.
3.
Do not touch the roller of Guide Roller.
In case of the P4 Cap installation, install it with parallel
for “A” and “B” of Fig. 2-18-B.
In case of the Cassette Guide Post installation, install
correctly as the circled section of Fig. 2-18-C.
Fig. 2-18-B
“A” “B”
P4 Cap Cassette Opener
Fig. 2-18-C
[OK]
Cassette Guide Post
[NG]
Cassette Guide Post
1-7

DISASSEMBLY INSTRUCTIONS
3. REMOVAL AND INSTALLATION OF FLAT
PACKAGE IC
REMOVAL
1. Put the Masking Tape (cotton tape) around the Flat
Package IC to protect other parts from any damage.
(Refer to Fig. 3-1.)
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
Fig. 3-1
Masking Tape
(Cotton Tape)
IC
2. Heat the IC leads using a blower type IC desoldering
machine. (Refer to Fig. 3-2.)
NOTE
Do not add the rotating and the back and forth direc-
tions force on the IC, until IC can move back and forth
easily after desoldering the IC leads completely.
Fig. 3-2
Blower type IC
desoldering machine
IC
3. When IC starts moving back and forth easily after
desoldering completely, pickup the corner of the IC using
a tweezers and remove the IC by moving with the IC
desoldering machine. (Refer to Fig. 3-3.)
NOTE
Some ICs on the PCB are affixed with glue, so be
careful not to break or damage the foil of each IC
leads or solder lands under the IC when removing it.
Fig. 3-3
Blower type IC
desoldering machine
Tweezers
IC
4.
5. Peel off the Masking Tape. Absorb the solder left on the pattern using the Braided
Shield Wire. (Refer to Fig. 3-4.)
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Fig. 3-4
Braided Shield Wire
Soldering Iron
IC pattern
1-8

DISASSEMBLY INSTRUCTIONS
Fig. 3-5
INSTALLATION
1. Take care of the polarity of new IC and then install the
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 3-5.)
Soldering Iron
Solder temporarily Solder temporarily
2. Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
(Refer to Fig. 3-6.)
Fig. 3-6
Solder
IC
Soldering Iron
Supply soldering
from upper position
to lower position
3. Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 3-7.)
NOTE
Do not absorb the solder to excess.
Fig. 3-7
Soldering Iron
IC
Braided Shield Wire
4. When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thin-
tip Soldering Iron. (Refer to Fig. 3-8.)
Fig. 3-8
Thin-tip Soldering Iron
IC
5. Finally, confirm the soldering status on four sides of the
IC using a magnifying glass.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
NOTE
When the IC leads are bent during soldering and/or
repairing, do not repair the bending of leads. If the
bending of leads are repaired, the pattern may be
damaged. So, be always sure to replace the IC in this
case.
1-9

KEY TO ABBREVIATIONS
A
B
C
D
E
F
G
H
A/C
ACC
AE
AFC
AFT
AFT DET
AGC
AMP
ANT
A.PB
APC
ASS’Y
AT
AUTO
A/V
BGP
BOT
BPF
BRAKE SOL
BUFF
B/W
C
CASE
CAP
CARR
CH
CLK
CLOCK (SY-SE)
COMB
CONV
CPM
CTL
CYL
CYL-M
CYL SENS
DATA (SY-CE)
dB
DC
DD Unit
DEMOD
DET
DEV
E
EF
EMPH
ENC
ENV
EOT
EQ
EXT
F
FBC
FE
FF
FG
FL SW
FM
FSC
FWD
GEN
GND
H.P.F
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Audio/Control
Automatic Color Control
Audio Erase
Automatic Frequency Control
Automatic Fine Tuning
Automatic Fine Tuning Detect
Automatic Gain Control
Amplifier
Antenna
Audio Playback
Automatic Phase Control
Assembly
All Time
Automatic
Audio/Video
Burst Gate Pulse
Beginning of Tape
Bandpass Filter
Brake Solenoid
Buffer
Black and White
Capacitance, Collector
Cassette
Capstan
Carrier
Channel
Clock
Clock (Syscon to Servo)
Combination, Comb Filter
Converter
Capstan Motor
Control
Cylinder
Cylinder-Motor
Cylinder-Sensor
Data (Syscon to Servo)
Decibel
Direct Current
Direct Drive Motor Unit
Demodulator
Detector
Deviation
Emitter
Emitter Follower
Emphasis
Encoder
Envelope
End of Tape
Equalizer
External
Fuse
Feed Back Clamp
Full Erase
Fast Forward, Flipflop
Frequency Generator
Front Loading Switch
Frequency Modulation
Frequency Sub Carrier
Forward
Generator
Ground
High Pass Filter
I
K
L
M
N
O
P
R
S
H.SW
Hz
IC
IF
IND
INV
KIL
L
LED
LIMIT AMP
LM, LDM
LP
L.P.F
LUMI.
M
MAX
MINI
MIX
MM
MOD
MPX
MS SW
NC
NR
OSC
OPE
PB
PB CTL
PB-C
PB-Y
PCB
P. CON
PD
PG
P-P
R
REC
REC-C
REC-Y
REEL BRK
REEL S
REF
REG
REW
REV, RVS
RF
RMC
RY
S. CLK
S. COM
S. DATA
SEG
SEL
SENS
SER
SI
SIF
SO
SOL
SP
STB
SW
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Head Switch
Hertz
Integrated Circuit
Intermediate Frequency
Indicator
Inverter
Killer
Left
Light Emitting Diode
Limiter Amplifier
Loading Motor
Long Play
Low Pass Filter
Luminance
Motor
Maximum
Minimum
Mixer, mixing
Monostable Multivibrator
Modulator, Modulation
Multiplexer, Multiplex
Mecha State Switch
Non Connection
Noise Reduction
Oscillator
Operation
Playback
Playback Control
Playback-Chrominance
Playback-Luminance
Printed Circuit Board
Power Control
Phase Detector
Pulse Generator
Peak-to Peak
Right
Recording
Recording-Chrominance
Recording-Luminance
Reel Brake
Reel Sensor
Reference
Regulated, Regulator
Rewind
Reverse
Radio Frequency
Remote Control
Relay
Serial Clock
Sensor Common
Serial Data
Segment
Select, Selector
Sensor
Search Mode
Serial Input
Sound Intermediate Frequency
Serial Output
Solenoid
Standard Play
Serial Strobe
Switch
1-10

KEY TO ABBREVIATIONS
S
T
U
V
X
Y
SYNC
SYNC SEP
TR
TRAC
TRICK PB
TP
UNREG
V
VCO
VIF
VP
V.PB
VR
V.REC
VSF
VSR
VSS
V-SYNC
VT
X’TAL
Y/C
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Synchronization
Sync Separator, Separation
Transistor
Tracking
Trick Playback
Test Point
Unregulated
Volt
Voltage Controlled Oscillator
Video Intermediate Frequency
Vertical Pulse, Voltage Display
Video Playback
Variable Resistor
Video Recording
Visual Search Fast Forward
Visual Search Rewind
Voltage Super Source
Vertical-Synchronization
Voltage Tuning
Crystal
Luminance/Chrominance
1-11

PREVENTIVE CHECKS AND SERVICE INTERVALS
The following standard table depends on environmental conditions and usage.
Parts replacing time does not mean the life span for individual parts.
Also, long term storage or misuse may cause transformation and aging of rubber parts.
The following list means standard hours, so the checking hours depends on the conditions.
CLEANING
NOTE
After cleaning the heads with isopropyl alcohol, do not
run a tape until the heads dry completely. If the heads are
not completely dry and alcohol gets on the tape, damage
may occur.
1. AUDIO CONTROL HEAD
Clean the Audio Control Head with the cotton stick
soaked by alcohol. Clean the full erase head in the same
manner. (Refer to the figure below.)
Audio Control Head
2. TAPE RUNNING SYSTEM
When cleaning the tape transport system, use the gauze
moistened with isopropyl alcohol.
3. CYLINDER
Wrap a piece of chamois around your finger. Dip it in
isopropyl alcohol. Hold it to the cylinder head softly.
Turn the cylinder head counterclockwise to clean it (in the
direction of the arrow). (Refer to the figure below.)
NOTE
Do not exert force against the cylinder head. Do not move
the chamois upward or downward on the head.
Use the chamois one by one.
Cylinder Head
: Clean
: Check it and if necessary, replace it.
Time
Parts Name 500
hours 1,000
hours Notes
1,500
hours 2,000 hours 2,500 hours
Audio Control Head
Full Erase Head
(Recorder only)
Capstan Belt
Pinch Roller
Capstan DD Unit
Loading Motor
Tension Band
Capstan Shaft
Tape Running
Guide Post
Cylinder Unit
Clean those parts in
contact with the tape.
Clean the rubber, and parts
which the rubber touches.
Replace when rolling
becomes abnormal.
Clean the Head
T Brake Band
Clutch Ass’y
Idler Arm Ass’y
1-12

SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
Method Operations
Press the ATR button on the
remote control for more than
2 seconds during PLAY.
Adjusting of the Tracking to the center position.
Refer to the “MECHANICALADJUSTMENT” (GUIDE ROLLER) and “ELECTRICAL
ADJUSTMENT” (SWITHCHING POINT).
Make the short circuit
between the test point of
SERVICE and the GND.
The BOT, EOT, and the Reel Sensor do not work and the deck can be operated
without a cassette tape.
Refer to the “PREPARATION FOR SERVICING”
SERVICING FIXTURES AND TOOLS
VHS Alignment Tape
MHP Torque Gauge
PUJ48075-2 Roller Driver PTU94002-2 X-JG153 X Value Adjustment
Screwdriver
Torque Tape
PUJ48076-2 Short Jumper
VHS Alignment Tape
MHP-L
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE
1
2
3
4
5
6
7
8910
1. Tension Connect
2. Tension Arm
3. Guide Roller
4. Audio/Control Head
5. X value adjustment driver hole
6. P4 Post
7. T Brake Spring
8. T Reel
9. S Reel
10. Adjusting section for the Tension Arm position
1-13

1-14
MECHANICAL ADJUSTMENTS
TAPE REMOVAL METHOD AT NO POWER
SUPPLY 1. CONFIRMATION AND ADJUSTMENT
Read the following NOTES before starting work.
• Place an object which weighs between 450g~500g on the
Cassette Tape to keep it steady when you want to make
the tape run without the Cassette Holder. (Do not place
an object which weighs over 500g.)
1-1: CONFIRMATION AND ADJUSTMENT OF TENSION
POST POSITION
1.
2.
3.
Set to the PLAY mode.
Adjust the adjusting section for the Tension Arm position
so that the Tension Arm top is within the standard line of
Main Chassis.
While turning the S Reel clockwise, confirm that the edge
of the Tension Arm is located in the position described
above.
Fig. 1-2-A
Standard line of Main Chassis
Tension Arm
0.5mm (Adjusting range)
Fig. 1-2-B
Adjusting section for the
Tension Arm position
Tension Band
The TensionArm top will
move to the inside direction
of the Main Chassis.
The TensionArm top will
move to the outside direction
of the Main Chassis.
Bend
1-2: CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK
1.
2.
3.
After confirmation and adjustment of Tension Post
position (Refer to item 1-1), load the cassette type
torque tape and set to the PLAY mode.
Confirm that the right meter of the torque tape indicates
50~90gf•cm during playback in SP mode.
Confirm that the left meter of the torque tape indicates
25~40gf•cm during playback in SP mode.
1-3: CONFIRMATION OF VSR TORQUE
1.
2.
Install the Torque Gauge on the S Reel. Set to the Picture
Search (Rewind) mode. (Refer to Fig.1-4-B)
Then, confirm that it indicates 120~180gf•cm.
NOTE
Install the Torque Gauge on the reel disk firmly. Press the
REW button to turn the reel disk.
1. Remove the Top Cabinet and Front Cabinet.
(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)
2. Remove the screw 1of the Deck Chassis and remove
the Loading Motor.
3. Rotate the Pinch Roller Cam in the direction of the arrow
by hand to slacken the Video Tape.
4. Rotate the Clutch Ass'y either of the directions to wind
the Video Tape in the Cassette Case.
5. Repeat the above step 3~4.Then take out theVideo
Cassette from the Deck Chassis.
Be careful not toscratch on the tape.
Pinch Roller Cam
Main Cam Clutch Ass'y
Main Chassis (Front Side)
Loading Motor
Screw 1
Capstan DD Unit