JVC HR-XVC20U, HR-XVC21U Service Manual
SERVICE MANUAL
DVD/CD PLAYER Hi-Fi STEREO VIDEO CASSETTE RECORDER
HR-XVC20US,
SPECIFICATIONS
GENERAL
Power supply:
Power consumption:
Weight:
Dimensions:
Inputs/Outputs:
Video:
Audio:
Antenna:
Hi-Fi Frequency Response:
Hi-Fi Dynamic Range:
AC 120V 60Hz
Operation: 16W
Stand by: 2W
7.9lbs (3.6 kg)
Width : 16-15/16 inches (430 mm)
Height: 3-7/8 inches (99 mm)
Depth : 9-13/16 inches (249 mm)
In: 1Vp-p/75 ohm
Out: 1Vp-p/75 ohm
In:
Out:
UHF/VHF IN/OUT: 75 ohm coaxial
20Hz to 20,000Hz
More than 90dB
HR-XVC21U
(The specifications shown pertain specifically to the model HR-XVC20US.)
DVD section
Signal system:
Applicable disc:
Audio characteristics:
Frequency response:
S/N Ratio:
Harmonic distortion:
Wow and flutter:
Dynamic range:
Output:
-
8 dBm/50K ohm
-
8 dBm/1K ohm
Pickup:
C
NTSC
DVD (12cm, 8cm), CD (12cm, 8cm)
DVD: 4Hz - 22KHz
CD: 4Hz - 20KHz
90dB
0.02%
Below Measurable Level
90dB
Video : (RCA) 1 Vp-p/75ohm
Audio : (RCA)
Digital Audio : 0.5Vp-p 75 ohm
CD : Wavelength: 775 - 805 nm
Maximum output power: 0.5 mW
DVD : Wavelength: 640 - 660 nm
Maximum output power: 1.0 mW
-
8 dBm/1Kohm
VCR section
Video Head:
Audio Track:
Tuner:
RF Channel Output:
F.FWD/REW Time:
4 Rotary Heads
ACCESSORIES:
Hi-Fi Sound - 2 Tracks / MONO Sound - 1 Track
181 Channel Freq. Synthesized
VHF 2-13
UHF 14-69
CATV 14-36 (A)-(W)
37-59 (AA)-(WW)
60-85 (AAA)-(ZZZ)
86-94 (86)-(94)
95-99 (A-5)-(A-1)
100-125 (100)-(125)
01 (5A)
Channel 3 or 4, Switchable
Approx. 1 minute 48 seconds (with T-120 Cassette Tape) (at+25°C)
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
Remote control x 1
Batteries (2 x AA)
75 ohm Coaxial Cable x 1
AUDIO/VIDEO Cable x 1
HR-XVC20US, HR-XVC21UC D2VP11
No.82948
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 CD........................................................................... 1-1
1-4 VCR DECK ........................................................................1-2
1-5 VCR/DVD PCB ..................................................................1-2
2. REMOVAL OF VCR DECK PARTS.........................................1-3
2-1 TOP BRACKET..................................................................1-3
2-2 CASSETTE HOLDER ASS’Y.............................................1-3
2-3 CASSETTE SIDE L/R ........................................................1-3
2-4 LINK UNIT .........................................................................1-3
2-5 LINK LEVER / FLAP LEVER ............................................. 1-3
2-6 LOADING MOTOR / WORM..............................................1-4
2-7 TENSION ASS’Y................................................................1-4
2-8 T BRAKE ARM / T BRAKE BAND......................................1-5
S REEL / T REEL / IDLER ARM ASS’Y / IDLER GEAR ..............
2-9
2-10
CASSETTE OPENER / PINCH ROLLER BLOCK / P5 ARM ASS’Y.............
2-11 A/C HEAD ........................................................................ 1-6
2-12 FE HEAD .........................................................................1-6
2-13 CYLINDER UNIT ASS’Y ..................................................1-6
2-14 CAPSTAN DD UNIT.........................................................1-7
MAIN CAM / PINCH ROLLER CAM / JOINT GEAR ............
2-15
2-16 LOADING GEAR S/T UNIT..............................................1-7
2-17
CLUTCH ASS’Y / RING SPRING / CLUTCH LEVER / CLUTCH GEAR ...............
2-18
CASSETTE GUIDE POST / INCLINED BASE S/T UNIT / P4 CAP..............
REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ...........
3.
REMOVAL................................................................................1-9
INSTALLATION ......................................................................1-10
KEY TO ABBREVIATIONS ...................................................... 1-11
SERVICE MODE LIST.............................................................. 1-13
WHEN “N” IS ALWAYS BEING DISPLAYED ON THE TV MONITOR .
PARENTAL CONTROL - RATING LEVEL 4-DIGIT PASSWORD CANNCELLATION .
WHEN REPLACING EEPROM(MEMORY) IC ......................... 1-14
PREVENTIVE CHECKS AND SERVICE INTERVALS............. 1-15
CONFIRMATION OF HOURS USED ....................................... 1-15
CLEANING ...............................................................................1-15
SERVICING FIXTURES AND TOOLS...................................... 1-16
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE............
MECHANICAL ADJUSTMENT ................................................ 1-17
TAPE REMOVAL METHOD AT NO POWER SUPPLY ..........1-17
DISC REMOVAL METHOD AT NO POWER SUPPLY...........1-17
1. CONFIRMATION AND ADJUSTMENT .................................1-17
1-1
CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION .
1-2 CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK...........1-17
1-3 CONFIRMATION OF VSR TORQUE...............................1-17
1-4 CONFIRMATION OF REEL BRAKE TORQUE................1-18
2. CONFIRMATION AND ADJUSTMENT OF TAPE
RUNNING MECHANISM ..................................................1-18
2-1 GUIDE ROLLER .............................................................. 1-18
CONFIRMATION AND ADJUSTMENT OF AUDIO/CONTROL HEAD .
2-2
TAPE RUNNING ADJUSTMENT(X-VALUE ADJUSTMENT) .
2-3
ELECTRICAL ADJUSTMENTS ............................................... 1-20
1. BASIC ADJUSMENT ............................................................1-20
1-1 SWITCHING POINT ........................................................1-20
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE ............
IC DESCRIPTIONS ..................................................................1-21
SERVO TIMING CHART .......................................................... 1-24
MECHANISM TIMING CHART................................................. 1-25
TROUBLE SHOOTING GUIDE ................................................ 1-26
(VCR SECTION) .................................................................... 1-26
(DVD SECTION) .................................................................... 1-49
CHARTS AND DIAGRAMS
1-1
INTERCONNECTION DIAGRAM ............................................2-1
Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM .......... 2-3
VCR SYSCON SCHEMTAIC DIAGRAM .................................2-5
TUNER/JACK SCHEMATIC DIAGRAM ..................................2-7
OPERATION/DISPLAY SCHEMATIC DIAGRAM.................... 2-9
HI-FI/DEMODULATOR SCHEMATIC DIAGRAM .................. 2-11
POWER SCHEMATIC DIAGRAM .........................................2-13
MPEG/MICOM SCHEMATIC DIAGRAM ............................... 2-15
MEMORY SCHEMATIC DIAGRAM .......................................2-17
DSP SCHEMATIC DIAGRAM................................................ 2-19
MOTOR DRV SCHEMATIC DIAGRAM ................................. 2-21
READ CHANNEL SCHEMATIC DIAGRAM ...........................2-23
AUDIO/VIDEO SCHEMATIC DIARAM ..................................2-25
OPERATION SCHEMATIC DIAGRAM ..................................2-27
PRINTED CIRCUIT BOARD OPERATION............................ 2-29
1-5
PRINTED CIRCUIT BOARD VCR/DVD................................. 2-31
1-6
WAVEFORMS .......................................................................2-35
DVD BLOCK DIAGRAM ........................................................2-37
Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM ................. 2-39
SYSTEM CONTROL BLOCK DIAGRAM............................... 2-41
HI-FI/DEMODULATOR BLOCK DIAGRAM ........................... 2-43
1-7
TUNER/JACK BLOCK DIAGRAM .........................................2-45
POWER BLOCK DIAGRAM ..................................................2-47
1-8
1-8
PARTS LIST
1-9
3.1 PACKING AND ACCESSORY ASSEMBLY<M1> ................ 3-1
3.2 FINAL ASSEMBLY<M2>...................................................... 3-2
3.3 MECHANISM ASSEMBLY<M4> .......................................... 3-4
3.4 ELECTRICAL PARTS LIST .................................................. 3-7
VCR/DVD BOARD ASSEMBLY<03> ....................................... 3-7
1-13
OPERATION BOARD ASSEMBLY<28> .................................3-15
1-13
REFERENCE
SEMICONDUCTOR BASE CONNECTIONS.......................... 4-1
GENERAL SPECIFICATIONS[HR-XVC20US] ........................4-2
1-16
1-17
1-19
1-19
1-20
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. 1-1)
1.
Remove the 5 screws 1.
2.
Remove the Top Cabinet in the direction of arrow (A).
3.
Disconnect the following connector: (CP651).
4.
Unlock the 8 supports 2.
5.
Remove the Front Cabinet in the direction of arrow (B).
6.
Remove the 2 screws 3.
7.
Remove the Operation PCB in the direction of arrow (C).
Top Cabinet
1
(A)
Front Cabinet
(B)
2
2
2
2
2
2
3
3
2
2
(C)
Operation PCB
CP651
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
1
1
1
Fig. 1-1
1-3: DECK CD (Refer to Fig. 1-3)
1.
Make the short circuit on the position as shown Fig. 1-3
using a soldering. If you remove the Deck CD with no
soldering, the Laser may be damaged.
2.
Unlock the support 1 and remove the Deck Top Holder
in the direction of arrow (A).
3.
Remove the 2 screws 2.
4.
Remove the 2 screws 3.
5.
Disconnect the following connectors: (CP2301, CP2302,
CP2601).
6.
Remove the Deck CD in the direction of arrow (B).
7.
Remove the 3 screws 4.
8.
Remove the Front Angle in the direction of arrow (C).
Pick Up PCB
Make the sort circuit
using a soldering.
Fig. 1-3
Deck Top Holder
4
4
4
Deck CD
1
(A)
(C)
Front Angle
3
3
2
2
(B)
CP2601
CP2301
CP2302
NOTE
When the installation of the Deck CD, remove all the soldering on the short circuit position after the connection of Pick
Up PCB and VCR/DVD PCB connector.
(C)
(A)
(B)
Flap
Fig. 1-2
1-1
DISASSEMBLY INSTRUCTIONS
1-4: VCR DECK (Refer to Fig. 1-4)
1.
Remove the 3 screws 2.
2.
Disconnect the following connectors: (CP101, CP102,
CP103 and CP3001).
3.
Remove the AC Head Cover and VCR Deck in the
direction of arrow.
1
1
VCR Deck
1
AC Head Cover
CP103
CP101
CP102
CP3001
1-5: VCR/DVD PCB (Refer to Fig. 1-5)
1.
Remove the screw 1.
2.
Remove the 6 screws 2.
3.
Remove the VCR/DVD PCB in the direction of arrow.
2
VCR/DVD PCB
1
2
2
2
2
2
Fig. 1-4
1-2
Fig. 1-5
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. 2-2
(A)
(B)
Link Unit
Main Chassis
2-5: LINK LEVER/FLAP LEVER (Refer to Fig. 2-5)
1.
Extend the support 1.
2.
Remove the Link Lever.
3.
Remove the Flap Lever.
1
Flap Lever
Link Lever
Fig. 2-4
Fig. 2-5
Fig. 2-3-A
1-3
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)
Turn the Pinch Roller Cam clockwise so that the Tension
1.
Holder hook is set to the position of Fig. 2-7-A to move
the T ension 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.
T ension Arm Ass’y
Fig. 2-7-A
1
Tension Connect
Tension Spring
2
4
1
3
Tension Holder
Tension Band
T ension Arm Ass’y
1-4
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
[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.
[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
1-5
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 Ar m 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
• Screw Torque: 5 ± 0.5kgf•cm (Screw 1)
1-6
A/C Head Spring
1
A/C Head Base
• Screw Torque: 3 ± 0.5kgf•cm
(2)
(1)
1
(3)
1
1
Fig. 2-13
Fig. 2-11-A
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
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
1-7
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
1-8
P4 Cap
[OK]
Cassette Guide Post
[NG]
Cassette Guide Post
Cassette Opener
Fig. 2-18-B
Fig. 2-18-C
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.
Masking Tape
(Cotton Tape)
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 directions force on the IC, until IC can move back and forth
easily after desoldering the IC leads completely.
IC
Fig. 3-1
Blower type IC
desoldering machine
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.
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. 3-3
Braided Shield Wire
Soldering Iron
IC
Fig. 3-2
IC pattern
Fig. 3-4
1-9
DISASSEMBLY INSTRUCTIONS
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
Fig. 3-5
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.)
4. When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 3-8.)
IC
Thin-tip Soldering Iron
Fig. 3-8
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.
Solder
IC
Supply soldering
from upper position
to lower position
Soldering Iron
Fig. 3-6
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.
Soldering Iron
IC
Braided Shield Wire
1-10
Fig. 3-7
A
A/C
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
IC
I
IF
IND
INV
KIL
K
L
L
LED
LIMIT AMP
LM, LDM
LP
L.P.F
LUMI.
M
M
MAX
MINI
MIX
MM
MOD
MPX
MS SW
NC
N
NR
OSC
O
OPE
PB
P
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. CLK
S
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
1-11
S
SYNC
SYNC SEP
T
TR
TRAC
TRICK PB
TP
U
UNREG
V
V
VCO
VIF
VP
V. P B
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
1-12
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit and on
the remote control for more than a standard time (second).
Set Key
CH UP
CH UP STOP 2
CH UP PLAY 2
CH DOWN POWER 2
Set Key OperationsRemocon Key
REC 4 2
STOP 7 3
Set Key
FF 2
Standard Time
(seconds)
Standard Time
(seconds)
Operations
PLAY/REC total hours are displayed on the TV Monitor.
Refer to the “PREVENTIVE CHECKS AND SERVICE INTERVALS”
(CONFIRMATION OF HOURS USED).
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the “WHEN REPLACING EEPROM (MEMORY) IC”.
Adjust the SWITHCHING POINT automatically.
Refer to the “ELECTRICAL ADJUSTMENT” (SWITHCHING POINT).
Initialization of the factory on VCR.
NOTE: Do not use this for the normal servicing.
If you set a factory initialization, the memories are reset such as
the clock setting, the channel setting, and PLAY/REC total hours.
VCR operation mode at no connection of DVD.
Refer to the “PREPARATION FOR SERVICING”
NOTE: Although the DVD is connected, the DVD mode cannot be selected.
Initialization of the factory on DVD.
NOTE:
Releasing of PARENTAL LOCK.
Refer to the “PARENTAL CONTROL - RATING LEVEL”.
NOTE:
The function will only work without the setting of DVD disc at DVD
mode.
Do not use this for the normal servicing.
The function will only work without the setting of DVD disc at DVD
mode.
<NOTE> WHEN "N" IS ALWAYS BEING DISPLAYED ON THE TV MONITOR.
(REMOTE CONTROLLER FORMAT)
This product is usable the remote controller which is used by DVD+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.
PARENTAL CONTROL - RATING LEVEL (4 DIGIT PASSWORD CANCELLATION)
If the stored 4 digit password in the Rating Level menu needs to be cancelled, please follow the steps below.
Turn Unit ON.
1.
Press and hold the '7' key on the remote control unit.
2.
Simultaneously press and hold the 'STOP' key on the front panel.
3.
Hold both keys for more than 3 seconds.
4.
The On Screen Display message 'PASSWORD CLEAR' will appear.
5.
The 4 digit password has now been cleared.
6.
1-13
WHEN REPLACING EEPROM (MEMORY) IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to TABLE 1.
NOTE: No need setting for after INI 2F.
INI +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
ADDRESS DATA
00 0E 30 BA 60 64 64 4A 86 0B 2B 86 32 8A 08 0A 0F
10 AF 97 95 8A A0 55 31 04 88 A5 9F 3A
10 BF 00
00
PLAY/REC
20 3A 11 22 70 61 2A 3A 00 00 00 00 85 A2 B0 00 00
1.
Connect the set to TV Monitor.
2.
Turn on the POWER.
3.
Press both CH UP button on the set and the FF button on the set for more than 2 seconds.
Table 1
ADDRESS and DATA will appear on TV Monitor as Fig 1.
4.
ADDRESS is now selected and should “blink”. Using the SET + or - button on the remote,
step through the ADDRESS until required ADDRESS to be changed is reached.
5.
Press ENTER to select DATA. When DATA is selected, it will “blink”.
6.
Again, step through the DATA using SET + or - button until required DATA value has been selected.
7.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
8.
Repeat steps 4 to 7 until all data has been checked.
9.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
10.
Turn on the POWER.
11.
Press both CH UP button on the set and the PLAY button on the set for more than 2 seconds.
12.
After the finishing of the initializing of shipping, the unit will turn off automatically.
The unit will now have the correct DATA for the new MEMORY IC.
INIT 00 0E
0003
Fig. 1
1-14
PREVENTIVE CHECKS AND SERVICE INTER VALS
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
500
hours
1,000
hours
1,500
hours
2,000
hours
2,500
hours
CONFIRMATION OF HOURS USED
PLAY/REC total hours can be checked on the FIP.
Total hours are displayed in 16 system of notation.
NOTE: If you set a factory initialization, the total hours is reset to “0”.
1.
Connect the set to TV Monitor.
2.
Turn on the POWER.
3.
Press both CH UP button on the set and the FF button on
the set for more than 2 seconds.
4.
After the confirmation of using hours, turn off the power.
INIT 00 0E
PLAY/REC 0003
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
Initial setting content of MEMORY IC.
PLAY/REC total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)
: Clean
: Check it and if
necessary, replace it.
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
1-15
SERVICING FIXTURES AND TOOLS
(4 heads model)
VHS Alignment Tape
MHP
Torque Tape Short Jumper
Torque Gauge
PUJ48075-2
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE
Roller Driver
PTU94002-2
X-JG153 X Value Adjustment
Screwdriver
4
5
6
3
2
1
10
Tension Connect
1.
T ension Arm
2.
Guide Roller
3.
Audio/Control Head
4.
X value adjustment driver hole
5.
P4 Post
6.
T Brake Spring
7.
T Reel
8.
S Reel
9.
Adjusting section for the Tension Arm position
10.
89
7
1-16
MECHANICAL ADJUSTMENTS
TAPE REMOVAL METHOD AT NO POWER SUPPLY
1.
Remove the Top Cabinet, Front Cabinet and DVD Block.
(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)
2.
Remove the screw 1 of the Deck Chassis and remove the
Loading Motor. (Refer to Fig. 2)
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
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
T ension Arm
0.5mm (Adjusting range)
Fig. 1-1-A
Main Chassis (Front Side)
DISC REMOVAL METHOD AT NO POWER
SUPPLY
Remove the Top Cabinet and Front Cabinet. (Refer to item
1.
1 of the DISASSEMBLY INSTRUCTIONS.)
Rotate the gear of Deck CD section in the direction of the
2.
arrow by hand, remove the disc from Deck CD.
Gear
Deck CD
Adjusting section for the
Tension Arm position
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.
1-17
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 Holder Ass’y
Cassette Opener
Fig. 1-2-A
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 TP101 (Envelope)
and CH-2 to TP3002 (SW Pulse).
3.
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
4.
Trigger with SW Pulse and observe the envelope. (Refer
to Fig. 2-1-A)
5.
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)
6.
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).
7.
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)
Torque Gauge
Torque Gauge
S Reel
T Reel
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/Tension Arm Ass’y
T Reel side:
T Reel/T Brake Band//T Brake
Spring/T Brake Arm
CH-1
Envelope
(TP101)
CH-2
SW Pulse (TP3002)
Improper Proper
(a) Guide roller
(b) P4 Cap
Entrance
Max
A B
CH-1
CH-2
Track
Track
A : B ≥ 3 : 2
Fig. 2-1-A
Fig. 2-1-B
Exit
Max
Fig. 2-1-C
1-18
MECHANICAL ADJUSTMENTS
2-2: CONFIRMATION 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 TP3002, CH-2 to
TP101 and CH-3 to Audio Out.
5.
Playback the VHS Alignment Tape (MHP).
6.
Press and hold the Tracking-Auto button on the remote
control more than 2 seconds to set tracking to center.
7.
Set the X Value adjustment driver (X-JG153) to the 4 of
Fig. 2-2-B. At first, tur n 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.
Perfor m tracking operation and confirm the envelope is
maximum on the tracking center position.
9.
Playback the VHS Alignment Tape (MHP-L).
10.
Perfor m 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
1-19
ELECTRICAL ADJUSTMENTS
Read and perform this adjustment when repairing the
circuits or replacing electrical parts or PCB assemblies.
1. BASIC ADJUSTMENT
CAUTION
When you exchange IC and Transistor for a heat sink,
apply the silicon grease (YG6260M) on the contact section
of the heat sink. Before applying new silicon grease,
remove all the old silicon grease. (Old grease may cause
damages to the IC and Transistor.)
1-1: SWITCHING POINT
CONDITIONS
MODE-PLAYBACK
Input Signal-Alignment Tape (MHP)
INSTRUCTIONS
Connect CH-1 on the oscilloscope to TP3002 and CH-2
1.
to TP8001.
Playback the alignment tape. (MHP)
2.
Press and hold the Tracking-Auto button on the remote
3.
control more than 2 seconds to set tracking to center.
Press both CH UP button on the set and the STOP button
4.
on the set for more than 2 seconds.
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)
TU301
TP3001
TP3002
CP103
J8003
TP8001
TP101
J8001
FE HEAD
J8005
J8004
J8007
OS8001
J8006
CP102
CD102
AC HEAD
OPERATION PCB
SW7001
J8008
OS651
VCR/DVD PCB
CP681
V651
CD681
CP2601
CP2301
CP2302
CP651
CD501
CD2302
AC IN
CD2601
CD2301
1-20
TP101
TP3001
TP3002
TP8001
:
Envelope
:
Service Mode
:
Switching Pulse
:
Switching Point
DECK CD
IC DESCRIPTIONS
VCR/DVD PCB OEC0132A (IC3001)
No. PORT PIN NAME I/O DESCRIPRION
1 SVSS SVSS - Ground.
2 CTL_REF CTL_REF Output terminal for CTL amp REF (1/2 SVCC)
3 CTL-H(+) CTL-H(+) Input and output terminal of Control Head.
4 CTL-H(-) CTL-H(-) Input terminal of Control Head.
5 CTL_BIAS CTL_BIAS Output terminal for bias.
6 CTL_FB CTL_FB Input terminal for CTL feedback
7 CTL_AMP(O) CTL_AMP(O) Output terminal for amp out.
8 CTL_AMP(I) CTL_AMP(I) Input terminal for CTL shumit amp .
9 CFG CFG Input terminal for CAPSTAN FG signal detection.
10 SVCC SVCC + 5V (Servo)
11 AFC_PC AFC_PC AFC oscilator (external circuit).
12 AFC_OSC AFC_OSC AFC oscilator (external circuit).
13 AFC_LPF AFC_LPF LPF connection for AFC OSC.
14 CSYN/HSYN CSYNC OUT Output terminal for composite SYNC.
15 VLPF/VSYN VSYNC IN Input terminal for composite SYNC.(from 14pin)
16 CV_IN2 CV_IN2 IN Composite Video input terminal.(for data slicer)
17 CV_IN1 CV_IN1 IN Composite Video input terminal.(for OSD)
18 OSD VCC OSDVCC - + 5V
19 CV_OUT CV_OUT OUT Composite Video output.(with OSD)
20 OSD_VSS OSD_VSS - Ground.
21 4/2 FSC_OUT 4/2 FSC_OUT OUT 4 FSC pulse.
22 4/2 FSC_IN 4/2 FSC_IN IN 4 FSC pulse.
23 AVSS AVSS - Ground.
24 AN-B VIDEO_ENV IN Input terminal of video RF envelope.
25 AN-A BOT-H IN Tape start sensor input signal.
26 AN-9 EOT-H IN Tape end sensor input signal.
27 AN8 MS_SEN-B IN Input terminal of mecha state sensor.
28 P07/AN7 MS_SEN-A IN
29 P06/AN6 KEY-B IN Main unit key input.
30 P05/AN5 KEY-A IN
31 P04/AN4 STEREO_SEL IN Input terminal for the judgement of voice reception condition.
32 P03/AN3 HI-FI_ENV IN Input terminal of HiFi RF envelope.
33 P02/AN2 AFT-S_CURVE IN AFT S CURVE input for tuner.
34 P01/AN1 SERVICE IN Input terminal for Service Mode.
35 P00/AN0 TAB SW IN Input terminal for judge the tape if it has TAB or not.
36 AVCC AVCC - ON/OFF control Micon AD section.
37 P10/IRQ0 POWER_FAIL IN Input terminal of Power fail signal.
38 P11/IRQ1 VIDEO MUTE H OUT H for at AUTO_CLOCK in POWER OFF.
39 P12/IRQ2 POWER ON L OUT For control the user power switch ON/OFF.
1-21
IC DESCRIPTIONS
VCR/DVD PCB OEC0132A (IC3001)
40 P13/IRQ3 REEL-S IN Input terminal of reel sensor supply.
41 P14/IRQ4 REEL-T IN Input terminal of reel sensor take up.
42 P15/IRQ5 POWER ON-H OUT For control the user power switch ON/OFF.
43 P16/IC REM_IN IN Receive the remote control signal.
44 P17/TMOW DVD RESET OUT For control the DVD RESET.
45 P67/RP7/TMB DVD POWER CTL OUT Output terminal for DVD power CTL.(3.3V/9V)
46 P66/RP6/ADTRG DVD LED OUT The DVD LED light-up/put-off control output.
47 P65/RP5 VCR LED OUT The VCR LED light-up/put-off control output.
48 P64/RP4 1G/T-REC LED OUT LEM(LED Module) control terminal.
49 P63/RP3 2G/REC LED OUT LEM(LED Module) control terminal.
50 P62/RP2 3G/TV/VCR LED OUT LEM(LED Module) control terminal.
51 P61/RP1 4G OUT LEM(LED Module) control terminal.
52 P60/RP0 5G OUT LEM(LED Module) control terminal.
53 P37/TM0 Y/C CLOCK OUT Control terminal for Y/C. (CLOCK).
54 P36/BUZZ Y/C DATA OUT Control terminal for Y/C.(DATA).
55
56 VCC VCC - Power of CPU.
57 VSS VSS - Ground.
58
59
60 P25 SEG4 OUT LEM(LED Module) control terminal.
61 P24/SCL1 IIC CLK OUT CLOCK terminal for IIC BUS communication.
62 P23/SDA1 IIC DATA OUT DATA terminal for IIC BUS communication.
63 P22/SCK1 SEG5 OUT LEM(LED Module) control terminal.
64 P21/SO1 SO1/TX OUT Input terminal for DVD communication.(asynchronous)
65 P20/SI1 SI1/RX IN Output terminal for DVD communication.(asynchronous)
66 P47/RPTRG SEG6 OUT LEM(LED Module) control terminal.
67 P46/FTOB SEG7 OUT LEM(LED Module) control terminal.
68 P45/FTOA SEG8 OUT LEM(LED Module) control terminal.
69 P44/FTID NC OUT Not used.
70 P43/FTIC NC OUT Not used.
71 P42/FTIB SEG9 OUT LEM(LED Module) control terminal.
72 P41/FTIA NC OUT Not used.
73 P40/PWM14 SEG10 OUT LEM(LED Module) control terminal.
74 FEW FEW IN FZTAT Write protect.
75 X2 X2 OUT Subclock pulse(32.768KHz)
76 X1 X1 IN
77 /RESET /RESET IN RESET will be done when the voltage goes to HIGH after the
78 OSC1 OSC1 IN Connect the main crystal(10MHz)
P35 SEG1 OUT
P27 SEG2 OUT
P26 SEG3 OUT
LEM(LED Module) control terminal.
LEM(LED Module) control terminal.
LEM(LED Module) control terminal.
reset signal.
1-22
IC DESCRIPTIONS
VCR/DVD PCB OEC0132A (IC3001)
79 VSS VSS - Ground.
80 OSC2 OSC2 OUT Connect the main crystal(10MHz)
81 VCL VCL IN Connect the capacitor
82 MD0 MD0 IN FZTAT Write MODE.
83 P34/PWM2 NC OUT not used.
84 P33/PWM1 CAP_LIMIT OUT Switch the maximum output current of the Capstan Motor.
85 P32/PWM0 TUNER AUDIO MUTE-H OUT Output low at tuner and output high at external input/play.
86 P31/SV2 VCR-H OUT H for at PLAY in VCR MODE. L for except above case.
87 P30/SV1 POWER_MUTE OUT audio mute at POWER ON/OFF.
88 P70/PPG0 SYS_MUTE OUT audio mute for DVD at POWER ON/OFF.
89 P71/PPG1 NC OUT Not used.
90 P72/PPG2 NC OUT Not used.
91 P73/PPG3 AV SW_2 OUT Control rear/front video signal.(at AV X 2)
92 P74/PPG4/RP8 AV SW_1 OUT Control DVD/VCR video/audio signal.
93 P75/PPG5/RP9 Y/C CS OUT Control terminal for Y/C. (CHIP SELECT).
94 P76/PPG6/RPA RF CH SW OUT 3/4 ch Selection for the RF CH.
95 P77/RPG7/RPB AUDIO_MUTE-H OUT L for at AUDIO MUTE and POWER OFF. H for except above case.
96 P80/YCO V_REC_ST-H OUT On control of A/V recording(Whole width erase) circuit.
97 P81/EXCAP/YBO LDM CTL OUT Loading motor control terminal.
98 P82/EXCTL CAP_FWD-H OUT Capstan forward and backward command.
99 P83/C,ROT/R C.ROTARY OUT Color Rotary Control output.
100 P84/H.AMP/SW/G H.AMP.SW OUT Switching output of Head Amp SW.
101 P85/COMP/B COMP IN Comparison results input of Playback Envelope level on SP/LP
heads (4 heads).
102 P85/EZTTRG CAP_FULL OUT Output the HIGH during the acceleration force of capstan motor at
SLOW mode.
103 P87/DPG CYL_SPEED_UP OUT Output terminal for correct cylinder during SLOW.
104 DFG D FG/PG IN Input terminal for DRUM FG signal detection.
105 VIDEO_FF VIDEO_H.SW OUT Output terminal of Video Head SW.
106 AUDIO_FF HI-FI H.SW OUT Output terminal of HI-FI Head SW.
107 DRUM_PWM DRUM_PWM OUT PWM output of Cylinder control.
108 CAP_PWM CAP_PWM OUT PWM output of Capastan control.
109 V-PULSE DUMMY_V-SYNC OUT Virtual V Pulse output.
110 SV VSS SV VSS - Ground.
111 C.SYNC_IN SYNC IN Input terminal for composite SYNC.
112 VCC VCC(SV) - + 5V
1-23
VCR/DVD PCB IC3001 (OEC0132A)
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
1-24
C
Y
MECHANISM TIMING CHART
Please see the list below for the operational timing and the mode sensor output of the main parts on each mechanism modes.
MECHANISM MODE UNLOAD STOP3
Mode Dealing
Directions
Revolutional Angle of
MAIN CAM
Moving Quantity of
MAIN ROD (mm)
MODE MS-1
SENSOR
HIGH
LOW
EJECT
0
STBY
15
3
206.3100
180
Output
HIGH
MS-2
LOW
INCLINED BASE S/T UNIT
PINCH ROLLER BLOCK
P5 ARM ASS'Y (T BRAKE:LOW)
TENSION LEVER
TENSION ARM ASS'
(S REEL BRAKE)
VSR
S BRAKE:LOW
255
26.5
PRESS
PRESS
P5-ON (T BRAKE HIGH)
BRAKE-ON
PBF.SLOW
S BRAKE:HIGH
FF/REWSTOP2
323.8303.7272.2226.4
38.53529.521.5
TENSION CONNECT
(S REEL BRAKE)
T BRAKE ARM
(T REEL BRAKE)
LUTCH LEVER
LINK UNIT
FLAP LEVER
BRAKE-ON
BRAKE-ON
CLUTCH-ON
UP
BRAKE-ON
DIRECT
PRESS
1-25
(VCR SECTION)
POWER DOES NOT TURN ON
TROUBLESHOOTING GUIDE
Does display light?
YES
Is the voltage at
pin 30 of IC 3001
0V?
YES
Check of T501
and peripheral circuit.
NO
NO
Is the voltage
linked to L506?
YES
Check of V651
and peripheral circuit.
NO
Check of T501
and peripheral circuit.
Check IC3001.
1-26
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