Memorex MVP0028 User manual

SERVICE MANUAL
Design and specifications are subject to change without notice.
VIDEO CASSETTE PLAYER
MVP0028
ORIGINAL
MFR’VERSION A

SERVICING NOTICES ON CHECKING
As for the places which need special attentions,
they are indicated with the labels or seals on the
cabinet, chassis and parts. Make sure to keep the
indications and notices in the operation manual.
PERFORM A SAFETY CHECK AFTER
SERVICING
4.
Confirm that the screws, parts and wiring which
were removed in order to service are put in the
original positions, or whether there are the
portions which are deteriorated around the
serviced places serviced or not. Check the
insulation between the antenna terminal or
external metal and the AC cord plug blades.
And be sure the safety of that.
2. USE THE DESIGNATED PARTS
The parts in this equipment have the specific
characters of incombustibility and withstand
voltage for safety. Therefore, the part which is
replaced should be used the part which has
the same character.
Especially as to the important parts for safety
which is indicated in the circuit diagram or the
table of parts as a mark, the designated
parts must be used.
1. KEEP THE NOTICES 3. PUT PARTS AND WIRES IN THE
ORIGINAL POSITION AFTER
ASSEMBLING OR WIRING
There are parts which use the insulation
material such as a tube or tape for safety, or
which are assembled in the condition that
these do not contact with the printed board.
The inside wiring is designed not to get closer
to the pyrogenic parts and high voltage parts.
Therefore, put these parts in the original
positions.
Please include the following informations when you order parts. (Particularly the VERSION LETTER.)
1. MODEL NUMBER and VERSION LETTER
The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be
found at the end of the SERIAL NUMBER.
2. PART NO. and DESCRIPTION
You can find it in your SERVICE MANUAL.
HOW TO ORDER PARTS
!
A1-1

CONTENTS
A2-1
SERVICING NOTICES ON CHECKING.....................................................................................
HOW TO ORDER PARTS ..........................................................................................................
CONTENTS .................................................................................................................................
GENERAL SPECIFICATIONS ...................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS............................................
2. REMOVAL OF DECK PARTS............................................................................................
3. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ...............................................
KEY TO ABBREVIATIONS ........................................................................................................
SERVICE MODE LIST ................................................................................................................
PREVENTIVE CHECKS AND SERVICE INTERVALS..............................................................
SERVICING FIXTURES AND TOOLS .......................................................................................
PREPARATION FOR SERVICING.............................................................................................
MECHANICAL ADJUSTMENTS ................................................................................................
ELECTRICAL ADJUSTMENTS..................................................................................................
BLOCK DIAGRAMS
Y/C/AUDIO/HEAD AMP ..........................................................................................................
SYSTEM CONTROL/SERVO..................................................................................................
POWER/JACK.........................................................................................................................
PRINTED CIRCUIT BOARDS
SYSCON/DECK.......................................................................................................................
SYSCON..................................................................................................................................
SCHEMATIC DIAGRAMS
Y/C/AUDIO...............................................................................................................................
SYSTEM CONTROL/SERVO..................................................................................................
POWER ...................................................................................................................................
JACK ........................................................................................................................................
HEAD AMP ..............................................................................................................................
DECK .......................................................................................................................................
INTERCONNECTION DIAGRAM ...............................................................................................
WAVEFORMS .............................................................................................................................
MECHANICAL EXPLODED VIEW .............................................................................................
CHASSIS EXPLODED VIEWS ...................................................................................................
MECHANICAL REPLACEMENT PARTS LIST .........................................................................
CHASSIS REPLACEMENT PARTS LIST..................................................................................
ELECTRICAL REPLACEMENT PARTS LIST...........................................................................
A1-1
A1-1
A2-1
A3-1~A3-4
B1-1
B2-1~B2-5
B3-1~B3-2
C1-1, C1-2
C2-1
C3-1
C4-1
C4-1
D1-1~D1-4
D2-1, D2-2
E-1, E-2
E-3, E-4
E-5, E-6
F-1, F-2
F-3, F-4
G-1, G-2
G-3, G-4
G-5, G-6
G-7, G-8
G-9, G-10
G-11, G-12
G-13, G-14
H-1
I-1
I-2, I-3
J1-1
J2-1
J3-1

GENERAL SPECIFICATIONS
A3-1
G-1. Outline of the Product
3 -Speed 1/2" Video Cassette Player
G-2. VCR Format
VHS Standard NTSC PAL SECAM PAL-M PAL-N
VHS Hi-Fi Audio System(for Hi-Fi)
G-3. Color System NTSC PAL SECAM or Monochrome
G-4. NTSC Playback(PAL60Hz) Yes No
G-5. MESECAM Yes No
G-6. Cassette Tape
VHS type video cassette tape Width 12.65mm (1/2 Inch)
VHS-C type video cassette tape Width 12.65mm (1/2 Inch)
G-7. Tape Speed
NTSC or PAL-M PAL or SECAM
SP33.35 mm/sec SP23.39 mm/sec
LP16.67 mm/sec LP11.69 mm/sec
SLP11.12 mm/sec
G-8. Playback Time
NTSC or PAL-M
at SPMode Max. 210 min. (with T-210 cassette)
at LPMode Max. 420 min. (with T-210 cassette)
at SLPMode Max. 630 min. (with T-210 cassette)
PAL or SECAM
at SPMode Max. 300 min. (with E-300 cassette)
at LPMode Max. 600 min. (with E-300 cassette)
G-9.Rewind/Fast Forward Time(Approx.)
2'30"(FF) /2'30"(REW) (with T-120 cassette) (with E-180 cassette)
G-10.Search Speed
SP3 and 5Times
LP5 and 7Times
SLP7 and 9Times
G-11.Slow Speed
SPTimes
LP Times
SLPTimes
G-12.Frame Advance
SPTimes
LP Times
SLPTimes
G-13.Antenna Input Impedance
VHF/UHF 75 ohm unbalanced
G-14.RF Converter Output Nothing
Channel 3or 4ch.
Level/Impedance 66 dBµ/75 ohm
Sound Selector Yes( G I K) No
G-15.Stereo/Dual TV Sound
Yes( NICAM GERMAN USA JAPAN) No
G-16.Video Signal
Input Level -- Vp-p /-- ohm
Output Level 1Vp-p /75 ohm
S/N Ratio 50 dB (Weighted)
Horizontal Resolution at SP Mode 230 Lines

GENERAL SPECIFICATIONS
A3-2
G-17.Audio Signal
Input Level Microphone -- dB / -- Kohm
Line -- dB /-- Kohm
RCA-- dB /-- Kohm
Output Level Line -- dB /-- Kohm
RCA-8dB /1Kohm(0dB=0.775 Vrms)
S/N Ratio at SP Mode 42 dB (Weighted)
Harmonic Distortion :1.5 % (1KHz)
Frequency Response :at SPMode 100 Hz ~10 KHz
at LPMode 100 Hz ~6 KHz
at SLPMode 100 Hz ~ 4 KHz
G-18.Heads Video 2 Rotary Heads
FM Audio Rotary Heads
Audio / Control 1 Stationary Head ( Mono Stereo(L,R) )
Erase Full Track Erase
G-19.Motor: 3 Motors
Tape/Cassette Loading
Cylinder (Direct Drive)
Capstan (Direct Drive)
G-20.Power Source
--- V AC 50Hz AC 60Hz
12V DC
G-21.Power Consumption: 9.8Wat DC 12V
Per Year: ---kWh / Year
G-22.Dimensions(Approx.)
255 mm(W) 315 mm(D) 95 mm(H)
G-23.Weight(Approx.) Net : 3.0 ( 6.6 lbs)
Gross : 4.0 ( 8.8 lbs)
G-24.Cabinet Material
Cabinet Front: PS 94HB DECABROM
ABS 94V2 NON-DECA
94V0
G-25.Cassette Loading System: Front Cassette Loading System
G-26.Tape Counter: Linear Time Tape Counter Yes No
G-27.Protector: Power Fuse Dew Sensor Fuse Resistor
G-28.Regulation
Safety
UL CSA SAA SI CE SEV
NEMKO FEMKO DEMKO IEC65 CNS SISIR
SEMKO NZ HOMOLO SABS GOST
NOM AS3159 DENTORI UNE NONE
Radiation
FCC DOC PTT CE SEV
SABA SI NZ HOMOLO UNE
CNS CISPR13 DENTORI AS/NZS NONE
G-29.Temperature
Operation 5 ºC ~ 40 ºC
Storage -20 ºC ~ 60 ºC
G-30.Operating Humidity : Less than 80 %RH

GENERAL SPECIFICATIONS
A3-3
G-31.TerminalsVHF/UHF Antenna Input/Output Din TypeF-Type France Type
Front Video Input (RCA ø8.3)
Front Audio Input (RCA ø8.3)
Rear Video Input (RCA ø8.3)
Rear Audio Input (RCA ø8.3)
Rear Video Output (RCA ø8.3)
Rear Audio Output (RCA ø8.3)
21 PinDC 12V Jack (Center+)
Remote Jack (ø3.5). AC Inlet
G-32.Indicator Not Applicable
Power Stand By Rec Repeat Tape In
( Red ) ( )()( Red )()
Play Still ATR Auto Tracking Level Meter
( Red ) ( ) ( Red )() ()
G-33.On Screen Display Not Applicable
Tracking Stereo,Audio Output
Play/Stop/FF/Rew Repeat On/Off
Memory Tape Counter
Index Tape Speed
G-34.OSD Language
Eng Ger Fre Spa Ita Por Jan
OSD Language Setting
Eng Ger Fre Spa Ita Por Jan
G-35.Carton
Master Carton: Need No Need
Content: ---- Set
Material: ---- / ---- Corrugated Carton
Dimensions: ---- mm(L) ---- mm(W) ---- mm(D)
Description of Origin Yes No
Gift Box
Material Single/Brown Corrugated Carton ( with Photo Label)
Single/White Corrugated Carton ( with Photo Label)
SingleFull Color Carton W/Photo
Dimensions: 373 mm(L) 326 mm(W) 176.5 mm(D)
Design:As Per Buyer 's
Description of Origin: Yes No
Drop Test Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces
Height 25cm 31cm 46cm 62cm 80cm 100cm
Container Stuffing: 2947 Sets / 40' container
G-36.Accessories
Owner's Manual ( English/Spanish)
Remote Control Unit Dew Caution Sheet
Video Cassette Tape Battery (UM-x )
Safety Tip Toll Free Insert Sheet
Guarantee Card Audio-Video Cord (RCA)
Warning Sheet Quick Set-Up Sheet
Information Sheet U/V Mixer
75 ohm Coaxial Cable (Single Shield Double Shield)
300 ohm to 75 ohm VHF Antenna Adaptor
21pin Cable AC Cord
12V DC Car Cord(Single Plug)

GENERAL SPECIFICATIONS
A3-4
G-37.Other Features
Auto Head Cleaning Index Search
Auto Tracking HQ (VHS Standard High Quality)
Auto Power On, Auto Play, Auto Rewind, Auto Eject,Auto Power Off
Forward / Reverse Picture Search SQPB
CM Skip Rental
Vertical Eject
G-38.Switch
Front Power Play/Still F.FWD/Cue
Rew/Rev Eject/Stop Rec
Repeat
Rear RF-Converter Output Channel Selector( 1 or 2CH 3or 4CH)
G-39.Remote Control Unit: None
RC-
Power Source: D.C V Battery UM -
0 Ch Up / Tr UpPower
1 Ch Down / Tr Down Eject
2 Ch Skip Play
3 Cancel /CH Skip Play / Up
4 Enter Play / Slow / Up
5 Speed F.FWD
6 Index F.FWD / Right
7 Program Rew
8 Program / Video Plus Rew / Left
9 Video Plus Pause / Still
10 Set UpStill
11 Set Down Stop
12 Set Right Stop / Down
./.. Set Left REC / OTR
Auto Tracking Call Clock / Counter
Jog / Shuttle Menu Counter Memory
Dial JOGRepeat Counter Reset
Ring Shuttle Timer RecAudio Select
One Touch Playback Audio Dubbing AD Skip
Tracking + Tracking -

DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF MECHANICAL PARTS
AND P.C. BOARDS
1-1: TOP CABINET AND FRONT CABINET
(Refer to Fig. 1-1)
1.
2.
3.
4.
Remove the 4 screws 1.
Remove the Top Cabinet in the direction of arrow (A).
Unlock the 5 supports 2.
Remove the Front Cabinet in the direction of arrow (B).
1
2
2
2
2
(B)
Top Cabinet
(A)
Front Cabinet
Fig. 1-1
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).
(A)
(C)
(B)
Flap
Fig. 1-2
1-3: DECK CHASSIS (Refer to Fig. 1-3)
Remove the 3 screws 1.
Remove the screw 2.
Disconnect the following connectors: (CP4001, CP1004,
CP1002, CP1006, CP1003 and CP4101).
Remove the Deck Chassis in the direction of arrow.
1.
2.
3.
4.
1
1
1
2
Fig. 1-3
Deck Chassis
Bottom Plate
1-4: SYSCON PCB (Refer to Fig. 1-4)
1.
2.
3.
4.
Remove the 2 screws 1.
Remove the screw 2.
Remove the screw 3.
Remove the Syscon PCB in the direction of arrow.
2
11
Fig. 1-4
Bottom Plate
1
1
1
Syscon PCB
3
B1-1

DISASSEMBLY INSTRUCTIONS
When you install the Top Bracket, tighten the screws from
(1) to (3) in order.
2. REMOVAL OF DECK PARTS
2-1: TOP BRACKET (Refer to Fig. 2-1)
Remove the 3 screws 1.
Remove the Lock Lever Bracket, Lock Lever Rubber,
Lock Lever and Lock Lever Spring.
Slide the 2 supports 2and remove the Top Bracket.
1.
2.
3.
NOTE
When you install the Tape Guide L, install as shown in the
circle of Fig. 2-3-B. (Refer to Fig. 2-3-B)
REC Lever
Tape Guide L
• The REC Lever is not installed on the Video Cassette Player. Fig. 2-3-B
2-4: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-4)
Move the Cassette Holder Ass'y to the front side.
Push the Locker R to remove the Cassette Side R.
Remove the Cassette Side L.
1.
2.
3.
Main Chassis
Main Chassis
Cassette Side L
Cassette Side R Locker R
Fig. 2-4
2-5: CASSETTE SIDE L/R (Refer to Fig. 2-5)
Unlock the 4 supports 1and then remove the Cassette
Side L/R.
1.
B2-1
NOTE
When you install the Cassette Side R, be sure to move the
Locker R after installing.
Cassette Side L
Cassette Side R
1
1
1
Locker R 1
Fig. 2-5
NOTE
Fig. 2-2
2-3: TAPE GUIDE L (Refer to Fig. 2-3-A)
Move the Cassette Holder Ass'y to the back side.
Unlock the 2 supports 1and remove the Tape Guide L.
Remove the REC Lever. (Recorder only)
1.
2.
3.
REC Lever
Tape Guide L
Main Chassis
1
1
• The REC Lever is not installed on the Video Cassette Player. Fig. 2-3-A
Top Bracket
Main Chassis
Main Chassis
2
1
(1)
2
Fig. 2-1
• Screw Torque: 5 ±0.5kgf•cm
1
1
(2)
(3)
Top Bracket
Lock Lever Spring
Lock Lever
Lock Lever Rubber
Lock Lever Bracket
2-2: FLAP LEVER/TAPE GUIDE R (Refer to Fig. 2-2)
Move the Cassette Holder Ass'y to the back side.
Remove the Polyslider Washer 1.
Remove the Flap Lever.
Unlock the 3 supports 2and remove the Tape Guide R.
1.
2.
3.
4.
Flap Lever
1
Main Chassis
Tape Guide R
22
2

DISASSEMBLY INSTRUCTIONS
2-6: LINK ASS'Y (Refer to Fig. 2-6)
Set the Link Ass'y to the Eject position.
Remove the (A) side of the Link Ass'y first, then remove
the (B) side.
1.
2.
Main Chassis
(A)
Main Chassis
Link Ass'y
Fig. 2-6
2-7: LOADING MOTOR ASS'Y (Refer to Fig. 2-7)
Remove the Link Lever.
Remove the 2 screws 1.
Unlock the support 2and remove the Loading Motor
Ass'y.
Unlock the 2 supports 3and remove the Deck PCB
(BOT).
1.
2.
3.
4.
Link Ass'y
(B)
B2-2
1
Main Chassis 1
Link Lever
Deck PCB
(BOT)
2
3
Loading Motor Ass'y
• Screw Torque: 5 ±0.5kgf•cm Fig. 2-7
2-8: TENSION ASS'Y (Refer to Fig. 2-8-A)
Move the Inclined S Ass'y to the back side.
Remove the Tension Spring.
Unlock the support 1and remove the Tension Arm
Ass'y.
Remove the Tension Adjust.
Unlock the 2 supports 2and remove the Tension Band
Ass'y.
Unlock the support 3and remove the Tension Holder.
Remove the SS Brake Spring.
Remove the SS Arm Brake.
1.
2.
3.
4.
5.
6.
7.
8.
3
1
2
2
Tension Adjust
Tension Band Ass'y
Tension Spring Tension Arm Ass'y
Tension Holder
Inclined S Ass'y
Fig. 2-8-A
SS Brake Spring
SS Arm Brake
NOTE
When you install the Tension Adjust, install as shown in
Fig. 2-8-B. (Refer to Fig. 2-8-B)
Fig. 2-8-B
2-9: T BRAKE ASS'Y (Refer to Fig. 2-9)
Remove the T Brake Spring.
Remove the T Brake Ass'y.
1.
2.
Adjust the direction of the Marker to inside.
T Brake Spring
T Brake Ass'y
Fig. 2-9

DISASSEMBLY INSTRUCTIONS
2-10: S REEL/T REEL (Refer to Fig. 2-10)
Remove the S Reel and T Reel.
Remove the 2 Polyslider Washers 1.
1.
2.
NOTE
Do not touch the Pinch Roller. (Use gloves.)
When you install the Pinch Roller Block, install as shown
in the circle of Fig. 2-11-B. (Refer to Fig. 2-11-B)
1.
2.
NOTE
Take care not to damage the gears of the S Reel and T
Reel.
The Polyslider Washer may be remained on the back of
the reel.
Take care not to damage the shaft.
Do not touch the section "A" of S Reel and T Reel. (Use
gloves.) (Refer to Fig. 2-10) Do not adhere the stains
on it.
When you install the reel, clean the shaft and oil it (FL
OIL #6115). (If you do not oil, noise may be heard in FF/
REW mode.)
After installing the reel, adjust the height of the reel.
(Refer to MECHANICAL ADJUSTMENT)
1.
2.
3.
4.
5.
6.
S Reel
1
(A)
T Reel
(A)
1
Fig. 2-10
2-11: PINCH ROLLER BLOCK/P5-3 ARM ASS'Y
(Refer to Fig. 2-11-A)
Remove the P5 Spring.
Remove the screw 1.
Unlock the 2 supports 2and remove the Cassette
Opener.
Remove the Pinch Roller Block, Pinch Roller Arm
Spring, Pinch Roller Lever Ass'y and P5-3 Arm Ass'y.
1.
2.
3.
4.
1
2
2
P5 Spring
Cassette Opener
P5-3 Arm Ass'y
Pinch Roller Block
Pinch Roller Lever Ass'y
Main Chassis
Fig. 2-11-A
Pinch Roller Arm Spring
• Screw Torque: 5 ±0.5kgf•cm
B2-3
Fig. 2-11-B
A/C Head
2
2
A/C Head Spring
1
(3)
(1)
2
(2)
A/C Head Base
2-12: A/C HEAD (Refer to Fig. 2-12-A)
Remove the screw 1.
Remove the A/C Head Base.
Remove the 3 screws 2.
Remove the A/C Head and A/C Head Spring.
1.
2.
3.
4.
NOTE
Do not touch the A/C Head. (Use gloves.)
When you install the A/C Head Spring, install as shown
in Fig. 2-12-B. (Refer to Fig. 2-12-B)
When you install the A/C Head, tighten the screw (1)
first, then tighten the screw (2), finally tighten the screw
(3).
1.
2.
3.
• Screw Torque: 4 ±0.5kgf•cm (Screw 1)Fig. 2-12-A
Spring Position Fig. 2-12-B
2-13: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-13)
Remove the screw 1.
Remove the FE Head.
1.
2.
1
FE Head
• The FE Head is not installed on the Video Cassette Player.
• Screw Torque: 4 ±0.5kgf•cm Fig. 2-13

DISASSEMBLY INSTRUCTIONS
1
2
E-Ring
Middle Gear
Main Cam
Pinch Roller Cam
Joint Gear
P5 Cam
Fig. 2-16-A
NOTE
When you install the Pinch Roller Cam, P5 Cam and Main
Cam, align each marker. (Refer to Fig. 2-16-B)
Pinch Roller Cam
P5 Cam
Main Cam
Marker
Check the hole of Main
Chassis can be seen.
Fig. 2-16-B
2-17: CLUTCH ASS'Y (Refer to Fig. 2-17)
Remove the Polyslider Washer 1.
Remove the Clutch Ass'y, Ring Spring and Coupling
Gear.
Unlock the 2 supports 2and remove the Clutch Lever.
1.
2.
3.
2-15: CAPSTAN DD UNIT (Refer to Fig. 2-15)
Remove the Capstan Belt.
Remove the 3 screws 1.
Remove the Capstan DD Unit.
1.
2.
3.
• Screw Torque: 5 ±0.5kgf•cm Fig. 2-15
2-16: MIDDLE GEAR/MAIN CAM (Refer to Fig. 2-16-A)
Remove the Polyslider Washer 1, then remove the
Middle Gear.
Remove the E-Ring, then remove the Main Cam, P5
Cam and Pinch Roller Cam.
Remove the Polyslider Washer 2, then remove the
Joint Gear.
1.
2.
3.
Capstan DD Unit
Capstan Belt
11
1
Fig. 2-17
1
Clutch Ass'y
Ring Spring
Coupling Gear
Clutch Lever
2
2
B2-4
2-14: AHC ASS'Y/CYLINDER UNIT ASS'Y
(Refer to Fig. 2-14)
Unlock the support 1and remove the AHC Ass'y.
Remove the 3 screws 2.
Remove the Cylinder Unit Ass'y.
1.
2.
3.
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.
NOTE
1
AHC Ass'y
Cylinder Unit Ass'y
2
2
• Screw Torque: 3 ±0.5kgf•cm Fig. 2-14
(3)
(2)
(1)
2

DISASSEMBLY INSTRUCTIONS
2-18: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-18-A)
1.
2.
3.
4.
5.
6.
7.
8.
9.
1
2
Capstan Brake Spring Capstan Brake Ass'y
Main Rod Main Loading Gear
Tension Lever
Loading Gear T
Loading Gear
Spring
Loading Arm T Ass'y
Loading Gear S
Loading Gear
Spring
Loading Arm S Ass'y
LED Reflecter
Idler Arm Ass'y
Clutch Actuator
Remove the E-Ring 1and remove the Main Loading
Gear.
Remove the Capstan Brake Spring.
Slide the Main Rod and remove the Capstan Brake
Ass'y.
Remove the Main Rod, Tension Lever, Clutch Actuator,
Idler Arm Ass'y.
Remove the screw 2.
Remove the LED Reflecter.
Remove the Loading Arm S Ass'y and Loading Arm T
Ass'y.
Remove the Loading Gear S and Loading Gear T.
Remove the Loading Gear Spring.
2. When you install the Clutch Actuator, install as shown in
the circle of Fig. 2-18-C. (Refer to Fig. 2-18-C)
Fig. 2-18-C
Clutch Actuator
NOTE
Do not touch the roller of Guide Roller.
B2-5
• Screw Torque: 5 ±0.2kgf•cm (Screw 2)
• Screw Torque: 0.7 ±0.2kgf•cm (Screw 4)Fig. 2-19
Loading Gear Holder
Inclined T
P4 Cover
Guide Roller
Inclined S
1
2
3
4
4
Guide Roller
2-19: INCLINED S/T ASS'Y (Refer to Fig. 2-19)
Unlock the support 1and remove the P4 Cover.
Remove the screw 2.
Unlock the support 3and remove the Loading Gear
Holder.
Remove the Inclined S.
Remove the Inclined T.
Remove the 2 screws 4, then remove the Guide Roller.
1.
2.
3.
4.
5.
6.
• Screw Torque: 5 ±0.5kgf•cm Fig. 2-18-A
NOTES
Loading Arm T Ass'y
Main Loading Gear
Marker
Marker
Loading Arm S Ass'y
1. When you install the Loading Arm S Ass'y, Loading Arm
T Ass'y and Main Loading Gear, align each marker.
(Refer to Fig. 2-18-B)
Fig. 2-18-B

B3-1
Masking Tape
(Cotton Tape)
DISASSEMBLY INSTRUCTIONS
3.
REMOVAL
IC
Put the Masking Tape (cotton tape) around the Flat
Package IC to protect other parts from any damage.
(Refer to Fig. 3-1.)
1.
Fig. 3-1
NOTE
REMOVAL AND INSTALLATION OF
FLAT PACKAGE IC
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.
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
Blower type IC
desoldering machine
IC
Heat the IC leads using a blower type IC desoldering
machine. (Refer to Fig. 3-2.)
2.
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.
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.)
3.
Blower type IC
desoldering
machine
IC Fig. 3-3
Tweezers
Peel off the Masking Tape.4.
Absorb the solder left on the pattern using the Braided
Shield Wire. (Refer to Fig. 3-4.)
5.
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Braided Shield Wire
Soldering Iron
Fig. 3-4
IC pattern

B3-2
DISASSEMBLY INSTRUCTIONS
Supply soldering
from upper position
to lower position
IC
Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
(Refer to Fig. 3-6.)
2.
Fig. 3-6
Soldering IronSolder
IC
Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 3-7.)
3.
Fig. 3-7
Soldering Iron
Braided Shield Wire
NOTE
Do not absorb the solder to excess.
IC
When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thin-
tip Soldering Iron. (Refer to Fig. 3-8.)
4.
Fig. 3-8
Thin-tip Soldering Iron
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.
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.
5.
Solder temporarily
Soldering Iron
INSTALLATION
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.)
1.
Fig. 3-5
Solder temporarily

KEY TO ABBREVIATIONS
A
B
C
D
E
F
G
H
A/C
ACC
AE
AFC
AFT
AFT DET
AGC
AMP
ANT
A.PB
APC
ASS'Y
AT
AUTO
A/V
BGP
BOT
BPF
BRAKE SOL
BUFF
B/W
C
CASE
CAP
CARR
CH
CLK
CLOCK (SY-SE)
COMB
CONV
CPM
CTL
CYL
CYL-M
CYL SENS
DATA (SY-CE)
dB
DC
DD Unit
DEMOD
DET
DEV
E
EF
EMPH
ENC
ENV
EOT
EQ
EXT
F
FBC
FE
FF
FG
FL SW
FM
FSC
FWD
GEN
GND
H.P.F
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Audio/Control
Automatic Color Control
Audio Erase
Automatic Frequency Control
Automatic Fine Tuning
Automatic Fine Tuning Detect
Automatic Gain Control
Amplifier
Antenna
Audio Playback
Automatic Phase Control
Assembly
All Time
Automatic
Audio/Video
Burst Gate Pulse
Beginning of Tape
Bandpass Filter
Brake Solenoid
Buffer
Black and White
Capacitance, Collector
Cassette
Capstan
Carrier
Channel
Clock
Clock (Syscon to Servo)
Combination, Comb Filter
Converter
Capstan Motor
Control
Cylinder
Cylinder-Motor
Cylinder-Sensor
Data (Syscon to Servo)
Decibel
Direct Current
Direct Drive Motor Unit
Demodulator
Detector
Deviation
Emitter
Emitter Follower
Emphasis
Encoder
Envelope
End of Tape
Equalizer
External
Fuse
Feed Back Clamp
Full Erase
Fast Forward, Flipflop
Frequency Generator
Front Loading Switch
Frequency Modulation
Frequency Sub Carrier
Forward
Generator
Ground
High Pass Filter
I
K
L
M
N
O
P
R
S
H.SW
Hz
IC
IF
IND
INV
KIL
L
LED
LIMIT AMP
LM, LDM
LP
L.P.F
LUMI.
M
MAX
MINI
MIX
MM
MOD
MPX
MS SW
NC
NR
OSC
OPE
PB
PB CTL
PB-C
PB-Y
PCB
P. CON
PD
PG
P-P
R
REC
REC-C
REC-Y
REEL BRK
REEL S
REF
REG
REW
REV, RVS
RF
RMC
RY
S. CLK
S. COM
S. DATA
SEG
SEL
SENS
SER
SI
SIF
SO
SOL
SP
STB
SW
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Head Switch
Hertz
Integrated Circuit
Intermediate Frequency
Indicator
Inverter
Killer
Left
Light Emitting Diode
Limiter Amplifier
Loading Motor
Long Play
Low Pass Filter
Luminance
Motor
Maximum
Minimum
Mixer, mixing
Monostable Multivibrator
Modulator, Modulation
Multiplexer, Multiplex
Mecha State Switch
Non Connection
Noise Reduction
Oscillator
Operation
Playback
Playback Control
Playback-Chrominance
Playback-Luminance
Printed Circuit Board
Power Control
Phase Detector
Pulse Generator
Peak-to Peak
Right
Recording
Recording-Chrominance
Recording-Luminance
Reel Brake
Reel Sensor
Reference
Regulated, Regulator
Rewind
Reverse
Radio Frequency
Remote Control
Relay
Serial Clock
Sensor Common
Serial Data
Segment
Select, Selector
Sensor
Search Mode
Serial Input
Sound Intermediate Frequency
Serial Output
Solenoid
Standard Play
Serial Strobe
Switch
C1-1

KEY TO ABBREVIATIONS
S
T
U
V
X
Y
SYNC
SYNC SEP
TR
TRAC
TRICK PB
TP
UNREG
V
VCO
VIF
VP
V.PB
VR
V.REC
VSF
VSR
VSS
V-SYNC
VT
X'TAL
Y/C
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Synchronization
Sync Separator, Separation
Transistor
Tracking
Trick Playback
Test Point
Unregulated
Volt
Voltage Controlled Oscillator
Video Intermediate Frequency
Vertical Pulse, Voltage Display
Video Playback
Variable Resistor
Video Recording
Visual Search Fast Forward
Visual Search Rewind
Voltage Super Source
Vertical-Synchronization
Voltage Tuning
Crystal
Luminance/Chrominance
C1-2

C2-1
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
Method Operations
Adjusting of the Tracking to the center position.
Refer to the "MECHANICAL ADJUSTMENT" (GUIDE ROLLER) and "ELECTRICAL
ADJUSTMENT" (PG SHIFTER).
Press the ATR button on the
remote control for more than
2 seconds during PLAY.
Make the short circuit between
the test point of SERVICE and
the GND.
The EOT/BOT/Reel sensor do not work at this moment.
Refer to the "PREPARATION FOR SERVICING"

C3-1
PREVENTIVE CHECKS AND SERVICE INTERVALS
The following standard table depends on environmental conditions and usage. Unless maintenance is properly
carried out, the following service intervals may be quite shortened as harmful effects may be had on other parts.
Also, long term storage or misuse may cause transformation and aging of rubber parts.
Parts Name
Audio Control Head
Notes
Time 500
hours 1,000 hours 1,500 hours 2,000 hours 3,000 hours
: Clean
: Replace
Full Erase Head
(Recorder only)
Capstan Belt
Pinch Roller
Capstan DD Unit
Loading Motor
Tension Band
Capstan Shaft
Tape Running
Guide Post
Cylinder Unit
Clean those parts in
contact with the tape.
Clean the rubber, and parts
which the rubber touches.
Replace when rolling
becomes abnormal.
Clean the Head
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.)
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
Audio Control Head

(For 2 heads model)
VHS Alignment Tape
JG001
JG001A
JG001Q
JG001T
SERVICING FIXTURES AND TOOLS
JG100A Torque Tape
(VHT-063)
JG024AJG022 Master PlaneJG153 X Value Adjustment
Screwdriver
JG005 Post Adjustment
Screwdriver
Part No. SV-TG0-030-000
(small)
JG002B
JG002E
JG002F
Adapter
Dial Torque Gauge
(10~90gf•cm)
(60~600gf•cm)
(For 4 heads model)
VHS Alignment Tape
JG001B
JG001I
JG001P
JG001S
(VN S-LI6 )
(VN S-CO1 )
(VN S-LI6 H)
(VN S-X6 )
23
23
23
23
(VN S-LI6 )
(VN S-CO1 )
(VN S-LI6 H)
(VN S-X6 )
13
13
13
13
Reel Disk Height
Adjustment Jig
C4-1
JG154 Cable Tentelometer
Remarks
Part No.
APJG001000
Ref. No.
JG001Q
JG001T
JG001B
JG001I
JG001P
JG001S
JG002B
JG002E
JG002F
JG005
JG153
JG001
JG001A
APJG022000
APJG001A00
APJG001Q00
JG100A
JG154
JG024A
JG022
VHS Alignment Tape (For 2 heads model)
APJG001T00
APJG001B00
APJG001I00
APJG001P00
APJG001S00
APJG002B00
APJG002E00
APJG002F00
APJG005000
APJG153000
APJG024A00
APJG100A00
APJG154000
Parts Name
VHS Alignment Tape (For 2 heads model)
VHS Alignment Tape (For 2 heads model)
VHS Alignment Tape (For 2 heads model)
VHS Alignment Tape (For 4 heads model)
VHS Alignment Tape (For 4 heads model)
VHS Alignment Tape (For 4 heads model)
VHS Alignment Tape (For 4 heads model)
Adapter
Dial Torque Gauge (10~90gf•cm)
Dial Torque Gauge (60~600gf•cm)
Post Adjustment Screwdriver
X Value Adjustment Screwdriver
Master Plane
Reel Disk Height Adjustment Jig
Torque Tape (VHT-063)
Cable
Monoscope, 6KHz
Color Bar, 1KHz
Hi-Fi Audio
X Value Adjustment
Monoscope, 6KHz
Color Bar, 1KHz
Hi-Fi Audio
X Value Adjustment
VSR Torque, Brake Torque (S Reel/T Reel Ass'y)
Brake Torque (T Reel Ass'y)
VSR Torque, Brake Torque (S Reel)
Guide Roller Adjustment
X Value Adjustment
Reel Disk Height Adjustment
Reel Disk Height Adjustment
Playback Torque, Back Tension Torque During Playback
Used to connect the test point of SERVICE and GROUND
PREPARATION FOR SERVICING
Short circuit between TP1001 and Ground with the cable JG154.
(Refer to MAJOR COMPONENTS LOCATION GUIDE)
The EOT, BOT and Reel Sensor do not work at this moment.
At that time, the STOP/EJECT button is available to insert and eject the Cassette Tape.
1.