SERVICE MANUAL
VIDEO CASSETTE RECORDER
HR-A592US,
POWER
12 3
456
7089
CH(AUX)
–
REC
PAUSE
PLAY
REW FF
MENU
ENTER
STOP
+
–
SET
CANCEL
TV/VCR TIMER
C.RESET
A.MONITOR SP/EP DISPLAY
+
–
TV CH
TV POWER
+
–
TV VOL
INPUT
SPECIFICATIONS
HR-A592U
+
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
VIDEO/AUDIO
Signal system
Recording/Playback
system
Signal-to-noise ratio
Horizontal resolution
Frequency range
Normal audio
Hi-Fi audio
Input/Output
TUNER
Tuning system
Channel coverage
VHF
UHF
CATV
RF output
TIMER
Clock reference
Program capacity
Memory backup for timer
ACCESSORIES
Provided accessories
Specifications shown are for SP mode unless specified otherwise.
E. & O.E. Design and specifications subject to change without notice.
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
: AC 120 V, 60 Hz
:9W
: 1.7 W
5°C to 40°C (41°F to 104°F)
:
: –20°C to 60°C
: Horizontal only
: 360 mm x 95 mm x 222.5 mm (14-3/16" x 3-3/4" x 8-3/4")
: 3.2 kg (7.1 lbs)
: VHS NTSC standard
: 210 min. with ST-210 video cassette
: 630 min. with ST-210 video cassette
: NTSC-type color signal and EIA monochrome signal, 525 lines/60 fields
: DA-4 (Double Azimuth) head helical scan system
: 42 dB
: 230 lines
: 100 Hz to 10,000 Hz
: 20 Hz to 20,000 Hz
:
RCA connectors (IN x 1, OUT x 1)
: Frequency-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. 5 sec.
: RF cable (F-type), Infrared remote control unit, “AAA” battery x 2
C
(–4°F to140°F)
HR-A592US, HR-A592UC V16D0
No.82949
2002/12
TABLE OF CONTENTS
Section Title Page Section Title Page
Important Safety Precautions
INSTRUCTIONS
DISASSEMBLY INSTRUCTIONS
1.
REMOVAL OF MECHANICAL PARTS AND P.C.BOARDS ...............
1-1 TOP CABINET AND FRONT CABINET ............................ 1-1
1-2 FLAP ..................................................................................1-1
1-3 DECK CHASSIS ................................................................1-1
1-4 SYSCON PCB ...................................................................1-1
2. REMOVAL OF VCR 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 / SENSOR COVER R.......... 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
S REEL / T REEL / IDLER ARM ASS’Y / IDLER GEAR ..............
2-9
CASSETTE OPENER / PINCH ROLLER BLOCK / P5 ARM ASS’Y.............
2-10
2-11 A/C HEAD ........................................................................1-5
2-12 FE HEAD .........................................................................1-5
2-13 CYLINDER UNIT ASS’Y ..................................................1-5
2-14 CAPSTAN DD UNIT......................................................... 1-6
2-15
MAIN CAM / PINCH ROLLER CAM / JOINT GEAR ............
2-16 LOADING GEAR S/T UNIT..............................................1-6
CLUTCH ASS’Y / RING SPRING / CLUTCH LEVER / CLUTCH GEAR ...............
2-17
CASSETTE GUIDE POST / INCLINED BASE S/T UNIT / P4 CAP..............
2-18
KEY TO ABBREVIATIONS ........................................................ 1-8
PREVENTIVE CHECKS AND SERVICE INTERVALS.............1-10
CLEANING ...............................................................................1-10
SERVICE MODE LIST.............................................................. 1-11
WHEN “N” IS ALWAYS BEING DISPLAYED ON THE TV MONITOR ..
SERVICING FIXTURES AND TOOLS...................................... 1-11
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE............
MECHANICAL ADJUSTMENT ................................................ 1-12
TAPE REMOVAL METHOD AT NO POWER SUPPLY ..........1-12
1. CONFIRMATION AND ADJUSTMENT .................................1-12
CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION .
1-1
1-2 CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK........... 1-12
1-3 CONFIRMATION OF VSR TORQUE ...............................1-12
1-4 CONFIRMATION OF REEL BRAKE TORQUE................1-13
2. CONFIRMATION AND ADJUSTMENT OF TAPE
RUNNING MECHANISM ..................................................1-13
2-1 GUIDE ROLLER .............................................................. 1-13
CONFIRMATION AND ADJUSTMENT OF AUDIO/CONTROL HEAD .
2-2
TAPE RUNNING ADJUSTMENT(X-VALUE ADJUSTMENT) .
2-3
ELECTRICAL ADJUSTMENTS ............................................... 1-15
1. BASIC ADJUSMENT ............................................................1-15
1-1 SWITCHING POINT ........................................................1-15
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE ............
SERVO TIMING CHART ..........................................................1-16
TROUBLE SHOOTING GUIDE ................................................ 1-17
POWER DOES NOT TURN ON ............................................1-17
POWER SHUTS OFF ............................................................ 1-18
AUDIO SHAKES ....................................................................1-19
1-1
CASSETTE TAPE IS NOT ACCEPTED.................................1-20
FF/REW DO NOT WORK ...................................................... 1-21
WHEN INSERTING CASSETTE, IT EJECTS IMMEDIATELY..
TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY ......1-22
PLAYBACK PICTURE JITTERS HORIZONTALLY................1-23
PLAYBACK PICTURE SHAKES............................................1-23
AUTO TRACKING DOES NOT OPERATE ............................1-24
WHEN PLAYBACK, FAST FORWARD OR REWIND MODE IS ACTIVATED, UNIT STOPS IMMEDIATELY ..
PLAYBACK PICTURE JITTERS VERTICALLY .....................1-25
NO PLAYBACK PICTURE .....................................................1-26
NO PICTURE DURING PLAYBACK......................................1-27
NO COLOR DURING SELF RECORDING AND PLAYBACK.
CYLINDER NOT ROTATING DURING PLAYBACK AND RECORDING ..
PLAYBACK PICTURE NOISY(EVEN AFTER CLEANING HEADS) .
1-4
NO NORMAL AUDIO ON PLAYBACK ...................................1-29
1-5
CAPSTAN DD MOTOR NOT ROTATING ..............................1-30
AUDIO CAN NOT BE RECORDED ....................................... 1-31
CASSETTE IN AND DOWN, UNIT HAS NO FUNCTIONS.... 1-32
RECORDING MECHANISM WORKS, BUT NO VIDEO RECORDED FROM INPUT JACK OR TUNER ..
NO E-E (NO VIDEO FROM TUNER).....................................1-34
1-6
NO E-E AUDIO (MONO)........................................................1-35
NO TUNER AUDIO (MONO).................................................. 1-36
1-7
1-7
CHARTS AND DIAGRAMS
INTERCONNECTION DIAGRAM ............................................2-1
Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM .......... 2-3
SYSTEM CONTROL/SERVO SCHEMATIC DAIAGRAM........2-5
POWER SCHEMATIC DIAGRAM ........................................... 2-7
1-11
OPERATION/DISPLAY SCHEMATIC DIAGRAM....................2-9
TUNER SCHEMATIC DIAGRAM...........................................2-11
1-11
Hi-Fi/DEMODULATOR SCHEMATIC DIAGRAM...................2-13
PRINTED CIRCUIT BOARDS SYSCON/BOT .......................2-15
WAVEFORMS ....................................................................... 2-18
Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM ................. 2-19
1-12
SYSTEM CONTROL/SERVO BLOCK DIAGRAM ................. 2-21
TUNER BLOCK DIAGRAM....................................................2-23
HI-FI/DEMODULATOR BLOCK DIAGRAM ........................... 2-25
OPERATION/DISPLAY BLOCK DIAGRAM...........................2-27
POWER BLOCK DIAGRAM .................................................. 2-27
PARTS LIST
3.1 PACKING AND ACCESSORY ASSEMBLY<M1> ................ 3-1
1-14
3.2 FINAL ASSEMBLY<M2>...................................................... 3-2
1-14
3.3 MECHANISM ASSEMBLY<M4> .......................................... 3-4
3.4 ELECTRICAL PARTS LIST .................................................. 3-7
SYSCON BOARD ASSEMBLY<03> ........................................ 3-7
BOT BOARD ASSEMBLY<07>............................................... 3-10
1-15
REFERENCE
SEMICONDUCTOR BASE CONNECTIONS.......................... 4-1
GENERAL SPECIFICATIONS[HR-A592US] ...........................4-2
1-21
1-24
1-27
1-28
1-28
1-33
Important Safety Precautions
cut close to connector
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.
v
Precautions during Servicing
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 comply 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.
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 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.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.1
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.
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 cathode 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.
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Metal sleeve
Connector
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.
1.25
2.0
5.5
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free
Wire insulation recessed
more than 4 mm
Fig.7
Crimping tool
Crimped at approx. center
of metal sleeve
Conductors extended
1
S40888-01
v
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
ab
c
V
Externally
exposed
accessible part
Z
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
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’) between soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
Fig. 8
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.
Fig. 9
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
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Region
Japan
USA & Canada
Europe & Australia R 10 MΩ/500 V DC
Region Load Z
Insulation Resistance (R)
≤
R 1 MΩ/500 V DC
≥≥
1 MΩ R 12 MΩ/500 V DC
≤
Table 1 Specifications for each region
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC 3 kV 1 minute
AC 1.5 kV 1 minute
(Class 2)
(Class 1)
Clearance Distance (d), (d')
≤
d, d' 3 mm
≤
d, d' 4 mm
≤
d, d' 3.2 mm
≤
d 4 mm
≤
d' 8 mm (Power cord)
≤
d' 6 mm (Primary wire)
a, b, cLeakage Current (i)AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
Japan
USA & Canada
Europe & Australia
Table 2 Leakage current specifications for each region
1 kΩ
0.15 µF
1.5 kΩ
2 kΩ
50 kΩ
2
≤
i 1 mA rms Exposed accessible parts
≤
i 0.5 mA rms
≤
i 0.7 mA peak
≤
i 2 mA dc
≤
i 0.7 mA peak
≤
i 2 mA dc
Exposed accessible parts
Antenna earth terminals
Other terminals
S40888-01
DISASSEMBLY INSTRUCTIONS
1.
REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS
1-1:
TOP CABINET AND FRONT CABINET
(Refer to Fig. 2-1)
1.
Remove the 4 screws 1.
2.
Remove the Top Cabinet in the direction of arrow (A).
3.
Unlock the 7 supports 2.
4.
Remove the Front Cabinet in the direction of arrow (B).
Top Cabinet
1
(A)
Front Cabinet
(B)
2
2
2
2
2
2
2
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).
(C)
1
1
1
Fig. 1-1
(A)
1-3: DECK CHASSIS (Refer to Fig. 1-3)
1.
Remove the screw 1.
2.
Remove the 2 screws 2.
3.
Unlock the 2 supports 3.
4.
Remove the BOT PCB in the direction of arrow (A).
5.
Disconnect the following connectors: (CP1001, CP4001,
CP4002 and CP4003).
6.
Remove the Deck Chassis in the direction of arrow (B).
1
Deck Chassis
(A)
3
3
(B)
CP4003
CP4001
2
BOT PCB
2
CP4002
Bottom Plate
CP1001
1-4: SYSCON PCB (Refer to Fig. 1-4)
1.
Remove the screw 1.
2.
Remove the screw 2.
3.
Remove the 2 screws 3.
4.
Remove the Syscon PCB in the direction of arrow.
3
3
Fig. 1-3
(B)
Flap
Fig. 1-2
Syscon PCB
Bottom Plate
1
2
Fig. 1-4
1-1
DISASSEMBLY INSTRUCTIONS
2. REMOVAL OF VCR DECK PARTS
2-1: TOP BRACKET (Refer to Fig. 2-1)
Extend the 2 supports 1.
1.
Slide the 2 supports 2 and remove the Top Bracket.
2.
NOTE
After the installation of the Top Bracket, bend the support
1.
1 so that the Top Bracket is fixed.
Top Bracket
1
Top Bracket
2
Main Chassis
2
Main Chassis
2-2: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-2)
1.
Move the Cassette Holder Ass'y to the front side.
2.
Push the Locker R to remove the Cassette Side R.
3.
Remove the Cassette Side L.
Cassette Side R
Main Chassis
1
Locker R
Fig. 2-1
NOTE
In case of the Locker R installation, check if the one
1.
position of Fig. 2-3-B are correctly locked.
When you install the Cassette Side R, be sure to move
2.
the Locker R after installing.
Locker R
Check if this position
Cassette Side R
is locked.
2-4: LINK UNIT (Refer to Fig. 2-4)
1.
Set the Link Unit to the Eject position.
2.
Unlock the support 1.
3.
Remove the (A) side of the Link Unit first, then remove
the (B) side.
Main Chassis
Link Unit
Fig. 2-3-B
Link Unit
Cassette Side L
Main Chassis
2-3: CASSETTE SIDE L/R (Refer to Fig. 2-3-A)
1.
Remove the Locker Spring.
2.
Unlock the 4 supports 1 and then remove the Cassette
Side L/R.
3.
Unlock the support 2 and then remove the Locker R.
Locker Spring
1
1
2
Cassette Side R
Cassette Holder
Locker R
1
1
Cassette Side L
Fig. 2-3-A
Fig. 2-2
(A)
(B)
Link Unit
Main Chassis
2-5: LINK LEVER/FLAP LEVER/SENSOR COVER R
(Refer to Fig. 2-5)
1.
Unlock the support 1.
2.
Remove the Sensor Cover R.
3.
Extend the support 2.
4.
Remove the Link Lever.
5.
Remove the Flap Lever.
1
2
Flap Lever
Sensor Cover R
Link Lever
Fig. 2-4
Fig. 2-5
1-2
DISASSEMBLY INSTRUCTIONS
2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A)
1.
Remove the screw 1.
2.
Remove the Loading Motor.
3.
Remove the Worm.
Loading Motor
Worm
Main Chassis
• Screw Torque: 3 ± 0.5kgf•cm
1
Fig. 2-6-A
NOTE
1.
In case of the Worm installation, check if the value of the
Fig. 2-6-B is correct.
2.
In case of the Loading Motor installation, hook the wire on
the Cassette Opener as shown Fig. 2-6-C.
3.
When installing the wires between Capstan DD Unit and
Loading Motor, connect them correctly as shown Fig. 2-6-D.
19.2 ± 0.1mm
2-7: TENSION ASS’Y (Refer to Fig. 2-7-B)
1.
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.
2.
Remove the Tension Spring.
3.
Unlock the 2 supports 1 and remove the Tension Band.
4.
Unlock the support 2 and remove the Tension Arm Ass’y.
5.
Unlock the support 3 and remove the Tension Connect.
6.
Float the hook 4 and turn it clockwise then remove the
Tension Holder.
Tension Arm Ass’y
Fig. 2-7-A
1
Tension Connect
Tension Spring
2
4
1
3
Tension Holder
Tension Band
Tension Arm Ass’y
Loading Motor
-
+
Safety surface for pressing
of the insert.
Pink
White
Fig. 2-6-B
Loading Motor
Cassette Opener
Fig. 2-6-C
Capstan DD Unit
L2
L1
Fig. 2-6-D
Fig. 2-7-B
NOTE
1.
In case of the Tension Band installation, note the direction of the installation. (Refer to Fig. 2-7-C)
2.
In case of the Tension Band installation, install correctly
as Fig. 2-7-D.
3.
In case of the Tension Connect installation, install as the
circled section of Fig. 2-7-E.
Tension Connect
Tension Band
Fig. 2-7-C
1-3
[OK]
[NG]
Tension Connect
Tension Connect
Tension Connect
DISASSEMBLY INSTRUCTIONS
NOTE
1.
Take care not to damage the gears of the S Reel and T
Tension Band
Tension Band
Fig. 2-7-D
Reel.
2.
The Polyslider Washer may be remained on the back of
the reel.
3.
Take care not to damage the shaft.
4.
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.
5.
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.)
6.
After installing the reel, adjust the height of the reel.
(Refer to MECHANICAL ADJUSTMENT)
Main Chassis
Fig. 2-7-E
2-8: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A)
Remove the T Brake Spring.
1.
Turn the T Brake Arm clockwise and bend the hook
2.
section to remove it.
Unlock the 2 supports 1 and remove the T Brake Band.
3.
T Brake Band
Hook section
1
1
T Brake Arm
T Brake Spring
Fig. 2-8-A
NOTE
1. In case of the T Brake Band installation, install correctly
as Fig. 2-8-B.
Idler Gear
Idler Arm Ass’y
S Reel
(A)
(B)
T Reel
1
(A)
1
Fig. 2-9-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.
[OK]
T Brake Band
[NG]
T Brake Band
T Brake Arm
T Brake Arm
Fig. 2-8-B
2-9: S REEL/T REEL/IDLER ARM ASS’Y/IDLER GEAR
(Refer to Fig. 2-9-A)
1.
Remove the S Reel and T Reel.
2.
Remove the 2 Polyslider Washers 1.
3.
Remove the Idler Arm Ass’y and Idler Gear.
1-4
[OK]
[NG]
Clutch Gear
Clutch Gear
Big Hole
(S Reel)
Small Hole
(T Reel)
Fig. 2-9-B
Idler Arm Ass’y
Idler Arm Ass’y
Fig. 2-9-C
DISASSEMBLY INSTRUCTIONS
2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/P5
ARM ASS’Y (Refer to Fig. 2-10-A)
1.2.Unlock the support 1 and remove the Cassette Opener.
Remove the Pinch Roller Block and P5 Arm Ass’y.
1
Cassette Opener
Pinch Roller Block
P5 Arm Ass’y
Main Chassis
Fig. 2-10-A
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.
Pinch Roller Block
P5 Arm Ass’y
Can be seen the hole of the
Main Cam.
Can be seen the hole of
the Pinch Roller Cam.
Fig. 2-10-B
2-11: A/C HEAD (Refer to Fig. 2-11-A)
1.
Remove the screw 1.
2.
Remove the A/C Head Base.
3.
Remove the 3 screws 2.
4.
Remove the A/C Head and A/C Head Spring.
NOTE
1.
Do not touch the A/C Head. (Use gloves.)
2.
When you install the A/C Head Spring, install as shown in
Fig. 2-11-B.
3.
When you install the A/C Head, tighten the screw (1) first,
then tighten the screw (2), finally tighten the screw (3).
(3)
(1)
2
2
(2)
2
A/C Head
Spring Position
Fig. 2-11-B
2-12: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12)
1.2.Remove the screw 1.
Remove the FE Head.
1
FE Head
• Screw Torque: 5 ± 0.5kgf•cm
• The FE Head is not installed on the Video Cassette Player.
Fig. 2-12
2-13: CYLINDER UNIT ASS’Y (Refer to Fig. 2-13)
1.
Disconnect the following connector:
(CD2001)
2.
Remove the 3 screws 1.
3.
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.
CD2001
Cylinder Unit Ass’y
1
• Screw Torque: 5 ± 0.5kgf•cm (Screw 1)
A/C Head Spring
A/C Head Base
Fig. 2-11-A
• Screw Torque: 3 ± 0.5kgf•cm
(3)
(2)
(1)
1
1
1
Fig. 2-13
1-5
DISASSEMBLY INSTRUCTIONS
2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14-A)
1.
Remove the Capstan Belt.
2.
Remove the 3 screws 1.
3.
Remove the Capstan DD Unit.
Capstan Belt
Capstan DD Unit
1
1
1
• Screw Torque: 4 ± 0.5kgf•cm
Fig. 2-14-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)
Applied position of
silicon bond
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.
1
Main Cam
2
Pinch Roller Cam
Joint Gear
Fig. 2-15-A
NOTE
1. In case of the Pinch Roller Cam and Main Cam installation, 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.
Pinch Roller Cam
Marker
Main Cam
1-6
Be careful not to apply the silicon
bond to the Pinch Roller.
Capstan DD Unit
Silicon Bond
Main Chassis
Fig. 2-14-B
Fig. 2-14-C
Fig. 2-15-B
2-16: LOADING GEAR S/T UNIT (Refer to Fig. 2-16-A)
1.2.Remove the E-Ring 1 and remove the Main Loading
Gear.
Remove the Main Rod, Tension Lever, Loading Arm S
Unit and Loading Arm T Unit.
1
Main Rod
Tension Lever
Main Loading Gear
Loading Arm T Unit
Loading Arm S Unit
Fig. 2-16-A
DISASSEMBLY INSTRUCTIONS
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)
Marker
Main Loading Gear
Marker
Loading Arm T Unit Loading Arm S Unit
Fig. 2-16-B
2-17: CLUTCH ASS’Y/RING SPRING/CLUTCH LEVER/
CLUTCH GEAR (Refer to Fig. 2-17-A)
1.
Remove the Polyslider Washer 1.
2.
Remove the Clutch Ass’y and Ring Spring.
3.
Remove the Clutch Lever.
4.
Remove the Coupling Gear, Coupling Spring and Clutch
Gear.
1
Clutch Ass’y
Ring Spring
Coupling Gear
Coupling Spring
Clutch Gear
Clutch Lever
2-18: CASSETTE GUIDE POST/INCLINED BASE S/T
UNIT/P4 CAP (Refer to Fig. 2-18-A)
1.
Remove the P4 Cap.
2.
Unlock the support 1 and remove the Cassette Guide
Post.
3.
Remove the Inclined Base S/T Unit.
4.
Remove the screw 2.
5.
Remove the LED Reflector.
Cassette Guide Post
Inclined Base T
Unit
P4 Cap
2
Fig. 2-18-A
Inclined Base S
Unit
LED Reflector
1
NOTE
1.
Do not touch the roller of Guide Roller.
2.
In case of the P4 Cap installation, install it with parallel
for “A” and “B” of Fig. 2-18-B.
3.
In case of the Cassette Guide Post installation, install
correctly as the circled section of Fig. 2-18-C.
“A”
“B”
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)
Clutch Ass’y
Coupling Gear
Fig. 2-17-B
P4 Cap
[OK]
Cassette Guide Post
[NG]
Cassette Guide Post
Cassette Opener
Fig. 2-18-B
Fig. 2-18-C
1-7
A/C
A
ACC
AE
AFC
AFT
AFT DET
AGC
AMP
ANT
A.PB
APC
ASS’Y
AT
AUTO
A/V
B
BGP
BOT
BPF
BRAKE SOL
BUFF
B/W
C
C
CASE
CAP
CARR
CH
CLK
CLOCK (SY-SE)
COMB
CONV
CPM
CTL
CYL
CYL-M
CYL SENS
D
DATA (SY-CE)
dB
DC
DD Unit
DEMOD
DET
DEV
E
E
EF
EMPH
ENC
ENV
EOT
EQ
EXT
F
F
FBC
FE
FF
FG
FL SW
FM
FSC
FWD
G
GEN
GND
H
H.P.F
KEY TO ABBREVIATIONS
:
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
H.SW
Hz
I
IC
IF
IND
INV
K
KIL
L
L
LED
LIMIT AMP
LM, LDM
LP
L.P.F
LUMI.
M
M
MAX
MINI
MIX
MM
MOD
MPX
MS SW
N
NC
NR
O
OSC
OPE
P
PB
PB CTL
PB-C
PB-Y
PCB
P. CON
PD
PG
P-P
R
R
REC
REC-C
REC-Y
REEL BRK
REEL S
REF
REG
REW
REV, RVS
RF
RMC
RY
S
S. CLK
S. COM
S. DATA
SEG
SEL
SENS
SER
SI
SIF
SO
SOL
SP
STB
SW
:
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
1-8
S
SYNC
SYNC SEP
T
TR
TRAC
TRICK PB
TP
U
UNREG
V
V
VCO
VIF
VP
V.PB
VR
V.REC
VSF
VSR
VSS
V-SYNC
VT
X
X’TAL
Y
Y/C
KEY TO ABBREVIATIONS
:
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
1-9
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.
Time
Parts Name
Audio Control Head
Full Erase Head
(Recorder only)
Capstan Belt
Pinch Roller
Capstan DD Unit
Loading Motor
Tension Band
T Brake Band
Clutch Ass’y
Idler Arm Ass’y
Capstan Shaft
Tape Running
Guide Post
Cylinder Unit
: Clean
: Check it and if necessary, replace it.
500
hours
1,000
hours
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.)
1,500
hours
2,000
hours
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.
2,500
hours
Notes
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
1-10
Audio Control Head
Cylinder Head
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
Method Operations
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”
<NOTE> WHEN "N" IS ALWA YS BEING DISPLAYED ON THE TV MONITOR.
(REMOTE CONTROLLER FORMAT)
This product is usable the remote controller which is used by VHS of the other brand.
If "N" is always being displayed on the TV monitor, can not control from provided remote controller since this product is other
brand format.
• How to return a JVC format.
Turn off the power of the set and push the CHANNEL+ button and the REC button of the set simultaneously.
SERVICING FIXTURES AND TOOLS
VHS Alignment Tape
MHP
Torque Tape
PUJ48076-2
3
2
VHS Alignment Tape
MHP-L
Short Jumper
Torque Gauge
PUJ48075-2
Roller Driver
PTU94002-2
X-JG153 X Value Adjustment
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE
4
5
Tension Connect
1.
T ension Arm
2.
Guide Roller
3.
Audio/Control Head
4.
X value adjustment driver hole
5.
P4 Post
6.
6
7
T Brake Spring
7.
T Reel
8.
S Reel
9.
Adjusting section for the Tension Arm position
10.
Screwdriver
1
8910
1-11
MECHANICAL ADJUSTMENTS
TAPE REMOVAL METHOD AT NO POWER SUPPLY
1.
Remove the Top Cabinet and Front Cabinet.
(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)
2.
Remove the screw 1 of 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 derections to wind the
Video Tape in the Cassette Case.
5.
Repeat the above step 3~4. Then take out the Video
Cassette from the Deck Chassis.
Be careful not to scratch on the tape.
Loading Motor
Screw 1
Capstan DD Unit
Pinch Roller Cam
Main Cam
Main Chassis (Front Side)
Clutch Ass'y
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.
Set to the PLAY mode.
2.
Adjust the adjusting section for the Tension Arm position
so that the Tension Arm top is within the standard line of
Main Chassis.
3.
While turning the S Reel clockwise, confirm that the edge
of the Tension Arm is located in the position described
above.
Standard line of Main Chassis
Tension Arm
0.5mm (Adjusting range)
Adjusting section for the
T ension Arm position
Fig. 1-1-A
1-12
Tension Band
The Tension Arm top will
move to the inside direction
of the Main Chassis.
Bend
The Tension Arm top will
move to the outside direction
of the Main Chassis.
Fig. 1-1-B
1-2: CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK
1.
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.
2.
Confirm that the right meter of the torque tape indicates
50~90gf•cm during playback in SP mode.
3.
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.1-2-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.
MECHANICAL ADJUSTMENTS
1-4: CONFIRMATION OF REEL BRAKE TORQUE
(S Reel Brake) (Refer to Fig. 1-2-B)
1.
Once set to the Fast Forward mode then set to the Stop
mode. While, unplug the AC cord when the Pinch Roller
Block is on the position of Fig. 1-2-A.
2.
Move the Idler Ass’y from the S Reel.
3.
Install the Torque Gauge on the S Reel. Turn the Torque
Gauge clockwise.
4.
Then, confirm that it indicates 60~100gf•cm.
(T Reel Brake) (Refer to Fig. 1-2-B)
1.
Once set to the Fast Forward mode then set to the Stop
mode. While, unplug the AC cord when the Pinch Roller
Block is on the position of Fig. 1-2-A.
2.
Move the Idler Ass’y from the T Reel.
3.
Install the Torque Gauge on the T reel. Turn the Torque
Gauge counterclockwise.
4.
Then, confirm that it indicates 30~50gf•cm.
The position at FF mode.
Pinch Roller Block
Stop at this position.
The position at
STOP mode.
Capstan DD Unit
Cassette Opener
2. CONFIRMA TION AND ADJUSTMENT OF TAPE RUNNING MECHANISM
Tape Running Mechanism is adjusted precisely at the
factory. Adjustment is not necessary as usual. When you
replace the parts of the tape running mechanism because of
long term usage or failure, the confirmation and adjustment
are necessary.
2-1: GUIDE ROLLER
1.
Playback the VHS Alignment Tape (MHP).
2.
Connect CH-1 of the oscilloscope to TP4001 (Envelope)
and CH-2 to TP1002 (SW Pulse).
3.
Trigger with SW Pulse and observe the envelope. (Refer
to Fig. 2-1-A)
4.
When observing the envelope, adjust the Roller Driver
(PTU94002-2) slightly until the envelope will be flat.
Even if you press the Tracking Button, adjust so that
flatness is not moved so much. (Refer to Fig. 2-1-B)
5.
Adjust so that the A : B ratio is better than 3 : 2 as shown
in Fig. 2-1-C, even if you press the Tracking Button to
move the envelope (The envelope waveform will begin to
decrease when you press the Tracking Button).
6.
Adjust the PG shifter during playback.
(Refer to the ELECTRICAL ADJUSTMENTS)
NOTE
After adjustment, confirm and adjust A/C head.
(Refer to item 2-2)
Cassette Holder Ass’y
Torque Gauge
Torque Gauge
S Reel
T Reel
Fig. 1-2-A
Fig. 1-2-B
NOTE
If the torque is out of the range, replace the following parts.
Check item
1-3
1-4
S Reel side:
Replacement Part
Idler Ass’y/Clutch Ass’y
S Reel/Tension Band/Tension
Connect/T ension Arm Ass’y
T Reel side:
T Reel/T Brake Band//T Brake
Spring/T Brake Arm
CH-1
Envelope
(TP4001)
CH-2
SW Pulse (TP1002)
Improper
(a) Guide roller
(b) P4 Cap
Entrance
Max
A B
CH-1
CH-2
Track
Track
A : B ≥ 3 : 2
Fig. 2-1-A
Proper
Fig. 2-1-B
Exit
Max
Fig. 2-1-C
1-13
MECHANICAL ADJUSTMENTS
2-2: CONFIRMA TION AND ADJUSTMENT OF AUDIO/
CONTROL HEAD
When the Tape Running Mechanism does not work well,
adjust the following items.
1.
Playback the VHS Alignment Tape (MHP).
2.
Confirm that the reflected picture of stamp mark is
appeared on the tape prior to P4 Post as shown in Fig. 2-
2-A.
a)
When the reflected picture is distorted, turn the screw
1 clockwise until the distortion is disappeared.
b)
When the reflected picture is not distorted, turn the
screw 1 counterclockwise until little distortion is
appeared, then adjust the a).
3.
Turn the screw 2 to set the audio level to maximum.
4.
Confirm that the bottom of the Audio/ Control Head and
the bottom of the tape is shown in Fig. 2-2-C.
c)
When the height is not correct, turn the screw 3 to
adjust the height. Then, adjust the 1~3 again.
Audio/Control Head
Reflected picture of
Stamp Mark
P4 Cap
2-3: TAPE RUNNING ADJUSTMENT
(X VALUE ADJUSTMENT)
1.
Confirm and adjust the position of the Tension Post.
(Refer to item 1-1)
2.
Adjust the Guide Roller. (Refer to item 2-1)
3.
Confirm and adjust the Audio/Control Head.
(Refer to item 2-2)
4.
Connect CH-1 of the oscilloscope to TP1002, CH-2 to
TP4001 and CH-3 to HOT side of Audio Out Jack.
5.
Playback the VHS Alignment Tape (MHP).
6.
Set the X Value adjustment driver (X-JG153) to the 4 of
Fig. 2-2-B. At first, turn the Audio/Control Head position
fully toward the capstan side. Then adjust X Value to turn
it back gradually toward the cylinder side and stop on the
second peak point position of the envelope.
Play MHP
Waveform output
X-value adjustment point
Drum side Control head position Capstan side
Audio/Control Head
3
2
Audio/Control Head
Tape
Stamp Mark
1
4
Fig. 2-2-A
Fig. 2-2-B
0.25±0.05mm
Fig. 2-2-C
Maximum
8.
Perform tracking operation and confirm the envelope is
maximum on the tracking center position.
9.
Playback the VHS Alignment Tape (MHP-L).
10.
Perform tracking operation and confirm the envelope is
maximum on the tracking center position. If envelope is
not maximum, should be fine-tune the X-VALUE.
Fig. 2-3
1-14
ELECTRICAL ADJUSTMENTS
Read and perform this adjustment when repairing the
circuits or replacing electrical parts or PCB assemblies.
1. BASIC ADJUSTMENT
1-1: SWITCHING POINT
CONDITIONS
MODE-PLAYBACK
Input Signal-Alignment Tape (MHP)
INSTRUCTIONS
Connect CH-1 on the oscilloscope to TP1002 and CH-2
1.
to TP4201.
Playback the alignment tape. (MHP)
2.
Adjust the VR1001 until the waveform of the oscilloscope
3.
measures 6.5 ± 0.5(H) at both leading and trailing edges.
(Refer to Fig. 1-1-A, B)
CH-2
6.5H
CH-1
Fig. 1-1-A
CH-2
CH-1
6.5H
Fig. 1-1-B
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (Connector Connections)
AC IN
J4201
CD501
TP4201 (SWITCHING POINT)
VR1001
TU6001
CP4003
TP4001 (ENVELOPE)
TP1001 (SERVICE MODE)
CD4001
CP4002
FE HEAD
TP1002 (HEAD SWITCHING PULSE)
AC HEAD
BOT PCB (COMPONENT SIDE)
CP1002
CP1004
CP1001
CD1503
CAPSTAN DD UNIT
J4203
J4204
V651
OS651
J4205
SYSCON PCB (COMPONENT SIDE)
1-15
SYSCON PCB IC1001 (OEC0131A)
DPG 104 PIN
DFG 104 PIN
SERVO TIMING CHART
24 Cycle
H. SW. P 105 PIN
V-SYNC (E-E) 111 PIN
REC CTL (REC)
7 PIN
V-SYNC (TRICK PB)
109 PIN
• WAVEFORM CHANGES DEPENDED ON THE TAPE SPEED
CH 1
CH 2
1-16
POWER DOES NOT TURN ON
TROUBLESHOOTING GUIDE
Is the voltage at pin 18, 36,
56, 82 and 112 of IC1001
about 5V?
No
Is the voltage at cathode
of D512 about 5V?
No
Check Around T501.
Yes
Yes
Check IC1001.
Check AT+5.2V line and the
check peripheral circuit.
1-17
POWER SHUTS OFF
Insert a cassette and
push PLAY button.
TROUBLESHOOTING GUIDE
Does it Power off in about
3 seconds?
No
Does it Power off in about
6 seconds?
No
Does it Power off intermittently?
No
Check IC1001.
Yes
Yes
Yes
Check TAPE LOADING,
LOADING BELT, MODE SENSOR,
DD MOTOR and CYLINDER MOTOR.
Check REEL SENSOR
and REEL BELT.
Check REEL SENSOR and
REEL BELT slack.
1-18
AUDIO SHAKES
TROUBLESHOOTING GUIDE
Is AUDIO HEAD scratched?
No
Does pin 9 of IC1001
output about 5Vp-p?
Yes
In playback, is the voltage
at pin 12 of CP1001 3.0V?
Yes
Check AUDIO BLOCK.
Yes
No
No
Replace AUDIO HEAD.
Replace CAPSTAN DD.
Check IC1001.
1-19
CASSETTE TAPE IS NOT
ACCEPTED
TROUBLESHOOTING GUIDE
Does WORM GEAR of
CASSETTE LOADING
BLOCK activate?
Yes
When cassette is not
inserted, is the voltage at pin
29 of IC1001 5V?
Yes
When a cassette is
inserted, is the voltage between
pins 2 and 4 of CP1001
12V?
No
When a cassette is
inserted, is the voltage at
pin 46 of IC1001 5V?
No
No
Yes
No
Check WORM GEAR of
CASSETTE LOADING BLOCK.
Check LED and PHOTO SENSOR
on DECK.
Replace LOADING MOTOR.
Replace IC1001.
Yes
Check circuit of LOADING MOTOR.
1-20
FF/REW DO NOT WORK
TROUBLESHOOTING GUIDE
Is the voltage changing
at pin 43 of IC1001 when you
press FF/REW?
Yes
Check DECK MECHANISM.
WHEN INSERTING CASSETTE,
IT EJECTS IMMEDIATELY
Does Another cassette go down?
No
No
Yes
Check pins 33 and 34 of IC1001 lines.
Defective CASSETTE or
CASSETTE LOADING BLOCK.
Are SW1001 and the lever
of the stage set correctly?
Yes
After a CASSETTE is
inserted is the voltage at pin 67
of IC1001 LOW?
Yes
When CASSETTE is
inserted is the voltage at pin 29
of IC1001 5V?
Yes
Check IC1001.
No
No
No
Check Rec LEVER.
Check SW1001.
Check LOADING GEARS.
1-21
TAPE LOADING IS OK, BUT
UNLOADS IMMEDIATELY
TROUBLESHOOTING GUIDE
Does CYLINDER rotate?
Yes
Does TP1002 feed
HEAD SWITCHING PULSE
signal?
No
No
Is the voltage at pins
6 and 7 of CP1001
UNREG 5V?
Yes
In playback, is the voltage
at pins 3, 8, 10 and 12 of
CP1001 about 5V?
Yes
Replace CYLINDER UNIT.
No
Does PG PULSE signal
appear at pin 104 of
IC1001?
No
No
Check pins 103 and 104
of IC1001 lines.
Replace CAPSTAN DD UNIT.
Yes
Check REEL SENSOR.
Yes
Replace IC1001.
1-22
PLAYBACK PICTURE
JITTERS HORIZONTALLY
TROUBLESHOOTING GUIDE
Is FG Pulse output level
at pin 10 of CP1001 about 6V?
6V
Yes
Is the voltage at pin 9 of
IC1001 about 5V?
Yes
Replace CYLINDER MOTOR.
PLAYBACK PICTURE SHAKES
No
No
Replace CYLINDER MOTOR.
Replace IC1001.
Is FG Pulse output level
at pin 10 of CP1001 about 6V?
6V
Yes
Is the voltage at pin 3 of
CP1001 about 6V?
Yes
Replace CYLINDER MOTOR.
No
Replace CYLINDER MOTOR.
No
Replace IC1001.
1-23
AUTO TRACKING DOES NOT
OPERATE
TROUBLESHOOTING GUIDE
By manual tracking,
does the DC level at pin 59
of IC4001 change?
Yes
In auto tracking, is the
voltage at pin 30 of IC1001
more than DC1.65V?
Yes
Replace IC1001.
WHEN PLAYBACK, FAST
FORWARD OR REWIND MODE
IS ACTIVATED, UNIT STOPS
IMMEDIATELY
No
No
Does the CTL PULSE
(about 1.0Vp-p) appear at pin 7
of IC1001?
1.0Vp-p
Yes
No
Check CYLINDER UNIT.
Check CONTROL HEAD.
Does CAPSTAN DD
MOTOR rotate?
Does the REEL SENSOR
PULSE signal appear at pins 39
and 40 IC1001?
Check IC1001 and check
peripheral circuit.
1-24
Yes
Yes
No
No
Refer to section "CAPSTAN DD
MOTOR NOTROTATING"
Check Q1002.
TROUBLESHOOTING GUIDE
PLAYBACK PICTURE JITTERS
VERTICALLY
No
Does tracking noise
appear in the picture?
Yes
By adjusting the manual
tracking UP/DOWN buttons, will the
noise disappear in the picture?
Yes
Are GUIDE POSTS
the right height?
Yes
Is PG SHIFTER Adjustment 6.5H?
No
No
No
Check P/B ENVELOPE.
Adjust GUIDE POST height.
Adjust PG SHIFTER.
Yes
Is PB-Y waveform normal?
No
Check PB-Y circuit.
Yes
Replace IC1001.
1-25
NO PLAYBACK PICTURE
TROUBLESHOOTING GUIDE
Is E-E appearing on
the Monitor TV?
Yes
Is there Video signal
at pin 30 of IC4001?
Yes
Is there VIDEO signal
at pin 26 of IC4001?
Yes
No
No
No
Is the voltage at pin 44,
52 and 68 of IC4001 5V?
Yes
Check IC4001.
No
Check P.CON 5V line.
Check J4203.
Check IC4001 and the
peripheral circuit.
Check J4201.
1-26
NO PICTURE DURING PLAYBACK
TROUBLESHOOTING GUIDE
Is there Video signal
at pin 26 of IC4001?
Yes
Is there Color signal
in Video signal at pin 26 of
IC4001?
Yes
Check IC4001.
NO COLOR DURING SELF
RECORDING AND PLAYBACK
No
Check IC4001.
No
Replace IC4001.
Does VIDEO signal appear
at pin 30 of IC4001?
Yes
Does VIDEO signal appear
at pin 26 of IC4001?
Yes
Check IC4001 and peripheral circuit.
No
No
Replace J4203.
Check VIDEO input circuit.
Change IC4001.
1-27
CYLINDER NOT ROTATING
DURING PLAYBACK AND
RECORDING
TROUBLESHOOTING GUIDE
Is the voltage at pin 6 and
7 of CP1001 about DC5V?
Yes
In playback, is the voltage
at pin 3, 8, 10 and 12 of CP1001
about DC5V?
No
Check IC1001.
PLAYBACK PICTURE NOISY
(EVEN AFTER CLEANING HEADS)
No
Yes
Check pin 103 and 104 of IC1001 lines.
Replace CAPATAN DD UNIT.
Is FM signal at TP4001
more than 300mVp-p?
Yes
Is VIDEO waveform
at pin 30 of IC4001 2Vp-p
are there any noises?
Yes
Is video output at pin 26
of IC4001 2Vp-p and are
there any noise?
Yes
Check J4201.
No
No
No
Check IC4001 and CYLINDER UNIT.
Check IC4001 and peripheral circuit.
Check IC4001 and IC1001.
1-28
NO NORMAL AUDIO
ON PLAYBACK
TROUBLESHOOTING GUIDE
Does audio appear on E-E?
Yes
Is the voltage at pin
6 of IC4001 2.3V?
Yes
Does AUDIO signal appear
at pin 10 of IC4001.
Yes
Check AUDIO HEAD for debris of
stains.
Check that the connector from
AUDIO HEAD is fully inserted to
Replace IC4001.
No
No
No
Refer to section "NO E-E".
Check C4031 and peripheral circuit.
Check IC4001 and peripheral circuit.
1-29
CAPSTAN DD MOTOR NOT
ROTATING
TROUBLESHOOTING GUIDE
In playback, is the voltage
at pin 2 and 4 of CP1001
12V?
Yes
Is the voltage at pin
11 of CP1001 5V?
Yes
In playback, check the
voltage at pin 108 of IC1001
is 2.5V?
Yes
Does DD MOTOR rotate now?
If not, replace DD MOTOR .
No
No
No
Check POWER circuit.
Replace IC1001.
1-30
AUDIO CAN NOT
BE RECORDED
TROUBLESHOOTING GUIDE
Is BIAS level O.K at
T4001?
Is there AUDIO signal
at pin 10 of IC4001?
60V
Yes
Yes
No
No
Is the voltage at Emitter
of Q4003 5V?
Yes
Is the voltage at pin 23
of IC4001 above 5V?
Yes
T4001 is broken or shorted.
No
No
Check POWER circuit.
Check IC4001.
Check the circuit between
audio out of Tuner and
pin 10 of IC4001.
Check J4201 and peripheral circuit.
1-31
CASSETTE IN AND DOWN,
UNIT HAS NO FUNCTIONS
TROUBLESHOOTING GUIDE
Does mode OSD
appear in Monitor?
No
Does VCR operate with
the remote control?
Yes
Check Operation PCB.
Yes
No
Check LOADING MOTOR, MODE
SENSOR and the peripheral parts.
Check IC1001.
1-32
RECORDING MECHANISM WORKS,
BUT NO VIDEO RECORDED FROM
INPUT JACK OR TUNER
TROUBLESHOOTING GUIDE
Does VIDEO signal
appear at pins 30 and
32 of IC4001?
Yes
Does VIDEO signal appear
at pin 26 of IC4001?
Yes
Does FM signal appear
at pin 59 to IC4001?
No
No
No
Is the voltage at pin
91 of IC1001 5V?
Yes
No
Check the circuit from
VIDEO input jack to IC4001,
from Tuner Pack to IC4001.
Check IC1001.
Check IC4001.
Yes
Does the FM current
appear at pin 59 of IC4001
during the REC?
Yes
Check CYLINDER UNIT and
IC4001 circuit.
No
Check IC4001 and check
the peripheral circuit.
1-33
NO E-E
(NO VIDEO FROM TUNER)
TROUBLESHOOTING GUIDE
Are the plugs
connected to the
VIDEO input jacks?
Yes
Do the voltages appear at
each terminal +B(5V) and
TU(32V) of TU6001?
Yes
Check VIDEO
Does VIDEO signal
appear at pin 18 of
TU6001?
No
No
No
Disconnect the plugs from the
VIDEO input Jacks.
Check peripheral circuit.
Replace TU6001.
Yes
Is there VIDEO
waveform at pin
32 of IC4001?
Yes
Replace IC4001.
No
Check J4201.
1-34
NO E-E AUDIO (MONO)
TROUBLESHOOTING GUIDE
Is the voltage at pins 52, 68
and 77 of IC4001 5V?
Yes
Does signal appear
at pin 78 of IC4001?
Yes
Does signal appear
at pin 10 of IC4001?
Yes
Check J4201.
No
No
No
Check POWER BLOCK.
Check J4204 and J4205.
Replace IC4001.
1-35
NO TUNER AUDIO (MONO)
TROUBLESHOOTING GUIDE
Do the voltages appear at
each terminal +B(5V) and
TU(32V) of TU6001?
Yes
Does signal appear
at pin 15 of TU6001?
Yes
Does signal appear
at pin 76 of IC4001?
Yes
Check J4201 and peripheral circuit.
No
No
No
Check POWER BLOCK.
Check TU6001 and peripheral circuit.
Replace IC4001.
1-36
<Reference>
C
E
C
C
C
K
A
DIODE
1SS133T-77 1N4005-EIC 1SS244T-77 LTE-3271T-012A-O
MTZJ12B T-77 21DQ09N-TA2B1
MTZJ13B T-77 RGP10J-EIC
MTZJ24B T-77 SB140-EIC
MTZJ33B T-77
MTZJ6.8B T-77
IC
1
AN3663FBP PST3231NR KIA431A-AT LTV-817M-VB
LA71206M-MPB
OEC0131A
SEMICONDUCTOR BASE CONNECTIONS
CATHODE
ANODE
1
1
1
2
3
TRANSISTOR
E
E
B
2SD734(E,F)-AA KTC3198-AT(Y,GR) 2SC4160-OEC-YAC1 KRA103SRTK RPT-38PB113
KTA1266-AT(Y,GR) KTC3203_Y-AT KRC103SRTK
E
C
ST-304L RPI-352C40N RPI-303
B B
KTC3209_Y-AT KTA1504S_Y_RTK
E
C
E
G
D
S
C
KTC3875S_Y_RTK
B
E
4-1
<Reference>
GENERAL SPECIFICATIONS [HR-A592US]
G-1 VCR System VHS Player / Recorder
G-2 Tuning Broadcasting System US System M
G-3 Power Power Source AC 120V, 60Hz
G-4 Regulation Safety UL / CSA
G-5 Temperature Operation 5oC - 40oC
G-6
G-7 Signal Video Signal Input Level 1 V p-p/75 ohm
System Video System NTSC
System Tuner and System 1Tuner
Operating Humidity
Hi-Fi STEREO Yes
NTSC PB(PAL60Hz) Deck DECK OVD-7
Heads Video Head 4Head
FM Audio Head 2Head
Normal Audio /Control Mono / Yes
Erase(Full T rac k Erase) Y es
T ape Rec P AL Speed NTSC SP/EP (SLP)
Play PAL -
Fast Forward / Rewind Time (Approx.) at +25Co FF:4'50"/REW:2'30"
Forward/Reverse NTSC or PAL-M SP/EP (SLP) = 3x,5x/9x,15x
Picture Search PAL or SECAM Frame Advance 1/10
Slow Speed 1/10
Receive CH Destination USA(w/CATV)
Intermediate Picture(FP) 45.75MHz
Frequency Sound(FS) 41.25MHz
Preset CH RF Converter Output Yes
Channel 3 or 4 ch
Level/Impedance 66dBu /75ohm
Sound Selector No
Stereo/Dual TV Sound Y es(US-ST)
Power Consumption Power On(at AC) 9W at 120V 60Hz
Protector Power Fuse Yes
Audio Signal Input Level -8dBm/50Kohm
Hi-Fi Audio Signal Dynamic Range : More than 90dB
Loading System Front
Motor 3
NTSC SP/EP (SLP)
with Cassette T-120
Tuning System F-Synth
Input Impedance VHF/UHF 75 OHM
CH Coverage
FP-FS 4.50MHz
DC -
Stand by (at AC) 1.7W at 120V 60Hz
Per Year -
Dew Sensor No
Radiation FCC / IC
Storage -20oC - 60oC
Output Level 1 V p-p/75 ohm
S/N Ratio (Weighted) 50 dB
Horizontal Resolution at SP Mode 230Line
Output Level -8dBm/1Kohm
S/N Ratio at SP (Weighted) 42dB
Harmonic Distortion at SP (1KHz)
Typical
Frequency Response at SP 100Hz - 10kHz
at LP -
at SLP 100Hz - 4kHz
Frequency Response 20Hz ~20kHz
Wow And Flutter : Less than 0.01 %Wrms
Channel Separation : More than 60 dB
Harmonic Distortion : Less than 0.01
2-69,4A,A-5~ A-1,A~I,J~ W
W+1-W+84
Less than 80% RH
1.5%
4-2
<Reference>
G-8 On Screen Menu Yes
Display Menu T ype Character
G-9 OSD Language English French Spanish
G-10 Clock,Timer Calendar 1990/1/1 ~ 2081/12/31
and Timer Timer Events 8 prog/1 month
Back-up One Touch Recording Max Time 6 Hours
G-11 Display Indicator Yes
GENERAL SPECIFICATIONS [HR-A592US]
Timer Rec Set Yes
Auto Repeat On/Off Yes
SAP On/Off Yes
CH Setup Yes
System Setup Yes
G-CODE(or SHOWVIEW or PLUSCODE)No. Entry No
Stereo,Audio Output,SAP Yes
Play/Stop/FF/Rew/Rec/OTR/T-Rec/Pause/Eject/Tape In
OTPB Valid Time No
Timer Back-up (at Power Off Mode) 5 sec.
Indicator Type LED Module (Amber + Red)
TV/CATV Yes
Auto CH Memory Yes
Add/Delete Yes
Clock Set Yes (Calendar 12H)
Language Yes
No Noise Back Ground Yes
Auto Clock Yes
Standard Time Yes
Daylight Saving Time Yes
(Symbol Mark)
CH/AV Yes
Clock Yes
Repeat Yes
Tape Counter Yes
Index No
Tape Speed Yes
ATR / Manual Tracking Yes
Zero Return No
Hi-Fi Yes
Clock/Counter,CH,Timer Rec, Play, REC
VCR Yes
PM Yes
RF Output CH Yes
Yes
Yes
4-3
<Reference>
GENERAL SPECIFICATIONS [HR-A592US]
G-12 Remote Unit RC-ES
G-13 Features Auto Head Cleaning No
Control Glow in Dark Remocon No
Format type JVC
Custom Code 43 / 03
Power Source Voltage(D.C) 3V
UM size x pcs UM-4 x 2 pcs
Total Keys 35 Keys
Keys Power Yes
1Yes
2Yes
3Yes
4Yes
5Yes
6Yes
7Yes
8Yes
9Yes
0/Input Select Yes
CH Up Yes
CH Down Yes
Play /Slow Yes
F.Fwd Yes
Rew Yes
Pause/Still Yes
Stop Yes
Rec/OTR Yes
Counter Reset/Cancel Yes
Speed / Auto Tracking Yes
Timer Rec Yes
Set/Tracking+ Yes
Set/ T rac king - Y es
Menu Yes
Enter Y es
Display (Clock/Counter+Call) Yes
TV/VCR Yes
Audio Select Yes
TV CH+ Yes
TV CH- Yes
TV Input Select Yes
TV Volume+ Y es
TV Volume- Y es
TV Power Yes
Auto Tracking Yes
Index Search No
HQ (VHS Standard High Quality) Yes
Auto Power On, Auto Play, Auto Rewind, Auto Eject Yes
Auto Power Off Yes
Forward/Reverse Picture Search Yes
VIDEO PLUS+ (SHOWVIEW,G-CODE) No
One Touch Play Back No
Auto CH Memory Yes
SQPB Yes
CATV Yes
Energy Star Yes
MTS (SAP) Yes
Auto Clock Set Yes
CM Skip (30sec x 6 Times) No
4-4
<Reference>
G-14 Accessories Owner's Manual Language English
G-15 Interface Switch Front Power Yes
G-16 Set Size Approx. W x D x H (mm) 360 x 222.5 x 95
G-17 Weight Net (Approx.) 3.2kg(7.1lbs)
GENERAL SPECIFICATIONS [HR-A592US]
w/Guarantee Card Yes
Remote Control Unit Yes
Dew Caution Sheet No
Video Cassette Tape No
Battery Yes
UM size x pcs UM 4 x 2pcs
Safety Tip No
Toll Free Insert Sheet No
Quick Set-Up Sheet No
Information Sheet (Buyer Supply) No
75 Ohm Coaxial Cable Yes
Rod Antenna No
Poles
Terminal
Loop Antenna No
Terminal
U/V Mixer No
DC Car Cord (Center+) No
Guarantee Card No
Warning Sheet No
Circuit Diagram No
Antenna Change Plug No
Service Facility List No
Important Safeguard No
Dew/AHC Caution Sheet No
AC Plug Adapter No
Quick Set-up Sheet No
AC Cord No
AV Cord No
Product Registration Card Yes
PTB Sheet No
300 ohm to 75 ohm Antenna Adapter No
Play Yes
Pause/Still No
System Select No
One T ouch Playback No
Channel Up Yes
Channel Down Yes
F.FWD/Cue Yes
Eject/Stop Yes
Main Power SW No
Volume Up No
Volume Down No
Rew/Rev Yes
Rec/OTR Yes
Rear RF Output SW No
Indicator Power No
Stand by No
Repeat No
TV/VCR No
Rec No
T-Rec No
Tape In No
Terminals Front Video Input RCA x 1 (Black)
Audio Input RCA x 2 (Stereo, Black)
Other T erminal No
Rear Video Input No
Audio Input No
Video Output RCA x 1 (Yellow)
Audio Output RCA x 2 (Stereo, White/Red)
Euro Scart No
DC Jack 12V (Center +) No
VHF/UHF Antenna Input F Type
AC Inlet No
Gross (Approx.) 3.8kg(8.4lbs)
4-5
<Reference>
GENERAL SPECIFICATIONS [HR-A592US]
G-18 Carton Master Carton No
Gift Box Yes
Drop Test Natural Dropping At 1Corner / 3Edges / 6Surfaces
Container Stuffing(40' container) 3,136 Sets
G-19 Material Cabinet Front PS 94V2 or More / DECABROM
PCB Non-Halogen Demand No
Content Material Dimensions W x D x H (mm) Description of Origin -
Material Single/Full Color
Dimensions W x D x H (mm) 420x291x160
Design As Per BUYER 's
Description of Origin Yes
Height (cm) 80
Eyelet Demand No
4-6
JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
www.jvcservice.com(US Only)
JVC CANADA INC.
Head office
:
21 Finchdene Square Scarborough, Ontario M1X 1A7
(416)293-1311
Printed in Japan
0212 VP
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