Memorex MVR2041 User manual

SERVICE MANUAL
VIDEO CASSETTE RECORDER
ORIGINAL
MFR’S VERSION A
MVR2041
Design and specifications are subject to change without notice.

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
A1-1
A1-1
A2-1
A3-1~A3-4
B1-1
B2-1~B2-5
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
E-7, E-8
E-9, E-10
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, J3-2
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............................................................................................
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/CCD/HEAD AMP.................................................................................................
SYSTEM CONTROL/SERVO/TIMER/DECK..........................................................................
TUNER.....................................................................................................................................
POWER...................................................................................................................................
OPERATION...........................................................................................................................
PRINTED CIRCUIT BOARDS
SYSCON/OPERATION/DECK................................................................................................
SYSCON/OPERATION...........................................................................................................
SCHEMATIC DIAGRAMS
Y/C/AUDIO/CCD/HEAD AMP.................................................................................................
SYSTEM CONTROL/SERVO/TIMER.....................................................................................
TUNER.....................................................................................................................................
POWER...................................................................................................................................
OPERATION............................................................................................................................
DECK.......................................................................................................................................
INTERCONNECTION DIAGRAM ...............................................................................................
WAVEFORMS .............................................................................................................................
MECHANICAL EXPLODED VIEW .............................................................................................
CHASSIS EXPLODED VIEWS ...................................................................................................
MECHANICAL REPLACEMENT PARTS LIST .........................................................................
CHASSIS REPLACEMENT PARTS LIST .................................................................................
ELECTRICAL REPLACEMENT PARTS LIST ..........................................................................

GENERAL SPECIFICATIONS
G-1 VCR System VHS Player / Recorder
System Video System NTSC
Hi-Fi STEREO No
NTSC PB(PAL60Hz) No
Deck DECK OVD-6S
Loading System Front
Motor 3
Heads Video Head 4Head
FM Audio Head No
Normal Audio /Control Mono
Erase(Full Track Erase) Yes
Tape Rec PAL -
Speed NTSC SP/SLP
Play PAL -
NTSC SP/LP/SLP
Fast Forward / Rewind Time (Approx.) FF:4'50"/REW:2'30"
with Cassette T-120
Forward/Reverse NTSC or PAL-M SP/LP/SLP=3x,5x/7x,9x/9x,15x
Picture Search PAL or SECAM -
Frame Advance Slow 1/10
Slow Speed Variable Slow 1/10
G-2 Tuning Broadcasting System US System M
System Tuner and System 1Tuner
Receive CH Destination USA(w/CATV)
Tuning System F-Synth
Input Impedance VHF/UHF 75 OHM
CH Coverage 2-69,4A,A-5~ A-1,A-1,J~ W
W+1-W+84
Intermediate Picture(FP) 45.75MHz
Frequency Sound(FS) 41.25MHz
FP-FS 4.50MHz
Preset CH No
RF Converter Output Yes
Channel 3 or 4 ch
Level/Impedance 66dBu /75ohm
Sound Selector No
Stereo/Dual TV Sound No
G-3 Power Power Source AC 120V,60Hz
DC -
Power Consumption Power On(at AC) 8W at 120V 60Hz
Stand by (at AC) 1.7W at 120V 60Hz
Per Year - kWh/Year
Protector Power Fuse Yes
Dew Sensor No
G-4 Signal Video Signal Input Level 1 V p-p/75 ohm
Output Level 1 V p-p/75 ohm
S/N Ratio (Weighted) 50
Horizontal Resolution at SP Mode 230Line
Audio Signal Input Level RCA-8dB/50Kohm
(0dB=0.775Vrms) Output Level RCA-8dB/1Kohm
S/N Ratio at SP (Weighted) 42dB
Harmonic Distortion (1KHz) 1.5%
Frequency Response at SP 100Hz - 10kHz
at LP 100Hz - 6kHz
at SLP 100Hz - 4kHz
Hi-Fi Audio Signal Dynamic Range : More than -
Frequency Response -
Wow And Flutter : Less than -
Channel Separation : More than -
Harmonic Distortion : Less than -
A3-1

GENERAL SPECIFICATIONS
G-5 Interface Switch Front Power Yes
Play Yes
Pause/Still No
System Select No
One Touch 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
Rec/OTR No
Repeat No
Tape In No
Kurupika Guide No
One Touch Playback No
Terminals Front Video Input RCA
Audio Input RCA
Other Terminal No
Rear Video Input No
Audio Input No
Video Output RCA
Audio Output RCA
Euro Scart No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input F Type
AC Inlet No
G-6 Set Size Approx. W x D x H (mm) 360 x 240 x 95
G-7 Weight Net (Approx.) 3.2kg(7.1lbs)
Gross (Approx.) 4.6kg(10.2lbs)
G-8 Regulation Safety UL
Radiation FCC
G-9 Temperature Operation 5oC - 40oC
Storage -20oC - 60oC
G-10 Operating Humidity Less then 80% RH
G-11 On Screen Menu Yes
Display Menu Type Character
ATS No
Timer Rec Set Yes
Auto Repeat On/Off Yes
SAP On Off No
CH Set-Up Yes
TV/CATV Yes
Auto CH Memory Yes
Add/Delete Yes
Pin Code Registration No
System Set-Up No
Clock Set Yes (Calendar 12H)
Language Yes
No Noise Back Ground Yes
G-CODE(or SHOWVIEW or PLUSCODE)No. Entry No
NICAM 1/2,NICAM Off,Audio Output No
Stereo,Audio Output,SAP No
Pl
a
y/S
top
/FF/R
ew
/R
ec
/OTR/T
-
R
ec
/P
ause
/Ej
ect
/T
ape
I
n
(Sy
m
b
o
l
M
ar
k)
Y
es
CH/AV Yes
Clock Yes
Repeat Yes
Pin Code No
Tape Counter Yes
Index No
Hotel Lock No
Tape Speed Yes
Manual Tracking (Bar Setting) No
Hi-Fi No
S-Repeat/SR-R/SR-Play No
VPS No
PDC No
G-12 OSD Language English French Spanish
OSD Language Setting English
A3-2

GENERAL SPECIFICATIONS
G-13 Display Indicator Yes
Indicator Type LED Module
Clock/Counter,CH,Timer Rec,OTR, Play
Rec,FF(Cue),Rew(Rev),Stop,ATR Yes
Pause("Rec"Flash) Yes
Still("Play"Flush) Yes
Eject(Tape Mark Flash) Yes
Slow Yes
WKL,Y.M.D,Start,End No
AFT No
Repeat No
A-DUB No
VCR Yes
Memory No
Index No
VPS No
PDC No
SP No
LP No
SLP No
AM No
PM Yes
F1,F2 No
RF Output CH Yes
TAPE IN Yes
G-14 Clock,Timer Calendar 1990/1/1 ~ 2081/12/31
and Timer Timer Events 8 prog/1 month
Back-up One Touch Recording Max Time 5 Hours
OTPB Valid Time No
Timer Back-up (at Power Off Mode) 5 sec.
G-15 Remote Unit RC-EA
Control Glow in Dark Remocon No
Power Source Voltage(D.C) 3V
UM size x pcs UM-4 x 2 pcs
Total Keys 34 Keys
Keys Power Yes
1 Yes
2 Yes
3 Yes
4 Yes
5 Yes
6 Yes
7 Yes
8 Yes
9 Yes
0 Yes
CH Up Yes
CH Down Yes
Input Select Yes
Play Yes
F.Fwd Yes
Rew Yes
Pause/Still Yes
Stop Yes
Rec/OTR Yes
Eject No
Counter Reset Yes
Speed Yes
Timer Rec Yes
TV Monitor No
Quick View No
Program No
Slow Yes
Auto Tracking Yes
Set/Tracking+ Yes
Set/ Tracking - Yes
Menu Yes
Enter Yes
Cancel Yes
Call Yes
TV/VCR Yes
Sleep Timer No
Muting No
Clock/Counter Yes
Zero Return Yes
CM Skip No
Audio Select No
A3-3

GENERAL SPECIFICATIONS
G-16 Features Auto Head Cleaning 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
ATS No
PDC No
VPS No
One Touch Playback No
Picture Control No
Auto Preset No
Channel Lock No
Hotel Lock No
Anti Theft No
Audio Dubbing No
Remort Control Code 1/2 No
SQPB No
CATV Yes
Energy Star Yes
MTS(SAP) No
CM Skip(30sec x 6 Times) No
G-17 Accessories Owner's Manual Language English/Spanish
w/Guarantee Card No
Remote Control Unit Yes
Dew Cation Sheet No
Video Cassette Tape No
Battery No
UM size x pcs UM-4 x 2 pcs
Safety Tip No
Toll Free Insert Sheet No
Quick Set-Up Sheet No
Information Sheet (Buyer Supply) No
75 Ohm Coaxial Cable Single shield
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 (2Pin-1Pin) No
Registration Card Yes
PTB Sheet No
Tape Rewinder(Buyer Supply) No
300 ohm to 75 ohm Antenna Adapter No
G-18 Carton Master Carton No
Content -
Material -
Dimensions W x D x H(mm) -
Description of Origin -
Gift Box Yes
Material Single/White
Dimensions W x D x H(mm) 430x310x165
Design As Per BUYER 's
Description of Origin Yes
Drop Test Natural Dropping At 1Corner / 3Edges / 6Surfaces
Height (cm) 80
Container Stuffing(40' container) 2,828Sets
G-19 Cabinet Material Cabinet Front PS 94V2
A3-4

DISASSEMBLY INSTRUCTIONS
B2-1
2. REMOVAL OF DECK PARTS
2-1: TOP BRACKET (Refer to Fig. 2-1)
Slide the 2 supports 1and remove the Top Bracket.1.
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.
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
Fig. 2-1
2-2: FLAP LEVER (Refer to Fig. 2-2)
Move the Cassette Holder Ass'y to the back side.
Remove the Polyslider Washer 1.
Remove the Flap Lever.
1.
2.
3.
1
1
Main Chassis
Main Chassis
Top Bracket
Top Bracket
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.
Main Chassis
REC Lever
Fig. 2-3-A
• The REC Lever is not installed on the Video Cassette Player.
1
Flap Lever
Main Chassis
1
1
Tape Guide L

DISASSEMBLY INSTRUCTIONS
B2-2
(A)
Link Unit
Link Unit
(B)
Main Chassis
2-6: LINK UNIT (Refer to Fig. 2-6)
Set the Link Unit to the Eject position.
Remove the (A) side of the Link Unit first, then remove
the (B) side.
1.
2.
Fig. 2-6 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
Fig. 2-9
T Brake Ass'y
Main Chassis
2-7: LOADING MOTOR ASS'Y (Refer to Fig. 2-7)
Remove the Link Lever.
Remove the Dumper Spring.
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.
5.
1
2
1
Loading Motor Ass'y
Link Lever
Main Chassis
• Screw Torque: 5 ±0.5kgf•cm Fig. 2-7
Deck PCB
(BOT)
Dumper Spring
3
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

DISASSEMBLY INSTRUCTIONS
B2-3
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
Fig. 2-11-B
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.
A/C Head
2
2
A/C Head Spring
1
(3)(1)
2
(2)
A/C Head Base
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.
FE Head
• The FE Head is not installed on the Video Cassette Player.
• Screw Torque: 4 ±0.5kgf•cm
Fig. 2-12-A
• Screw Torque: 5.0 ±0.5kgf•cm (Screw 1)
Fig. 2-13
1

DISASSEMBLY INSTRUCTIONS
B2-4
1
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 CamMarker
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, Pinch Roller Cam and Joint Gear.
1.
2.
Capstan DD Unit
Capstan Belt
11
1
Fig. 2-17
1
Clutch Ass'y
Ring Spring
Coupling Gear
Clutch Lever
2
2
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
2
• Screw Torque: 3 ±0.5kgf•cm Fig. 2-14
(1)
(3)
(2)
E-Ring

DISASSEMBLY INSTRUCTIONS
B2-5
2-18: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-18-A)
1.
2.
3.
4.
5.
6.
7.
8.
9.
Remove the E-Ring 1and remove the Main Loading
Gear.
Remove the Capstan Brake Spring.
Slide the Main Rod and remove the Spring Holder.
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.
Fig. 2-19
Loading Gear Holder
Inclined Base
T Unit
Inclined Base
S Unit
1
2
2-19: INCLINED S/T ASS'Y (Refer to Fig. 2-19)
Remove the Cap P4.
Remove the screw 1.
Unlock the support 2and remove the Loading Gear
Holder.
Remove the Inclined Base S Unit.
Remove the Inclined Base T Unit.
1.
2.
3.
4.
5.
1
2
Main Rod Main Loading Gear
Tension Lever
Loading Gear T
Loading Gear
Spring
Loading Arm T Ass'y
Loading Gear
Spring
LED Reflecter
Idler Arm Ass'y
Clutch Actuator
• 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
Capstan Brake Spring
Spring Holder
Loading Arm S Ass'y
Loading Gear S
Cap P4
• Screw Torque: 2.5 ±0.5kgf•cm

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
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
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
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
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
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
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"

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
C3-1
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
Wrap a piece of chamois around your finger. Dip it in
isopropyl alcohol and clean the audio control head by
wiping it horizontally. 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

(For 2 heads model)
VHS Alignment Tape
JG001
JG001A
JG001Q
JG001T
SERVICING FIXTURES AND TOOLS
JG100ATorque Tape
(VHT-063)
JG024AJG022 Master PlaneJG153X Value Adjustment
Screwdriver
JG005Post 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
JG154 Cable Tentelometer
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.
C4-1
Ref. No. Remarks
JG001
JG001Q
JG001A
JG001T
JG001B
JG001I
JG001P
JG001S
JG002B
JG002E
JG002F
JG005
JG153
JG022/JG024A
JG100A
JG154
Part No.
APJG001000
APJG001Q00
APJG001A00
APJG001T00
APJG001B00
APJG001I00
APJG001P00
APJG001S00
APJG002B00
APJG002E00
APJG002F00
APJG005000
APJG153000
APJG022000/APJG024A00
APJG100A00
APJG154000
Monoscope, 6KHz (For 2 heads model)
Hi-Fi Audio (For 2 heads Hi-Fi model)
Color Bar, 1KHz (For 2 heads model)
X Value Adjustment (For 2 heads model)
Monoscope, 6KHz (For 4 heads model)
Color Bar, 1KHz (For 4 heads model)
Hi-Fi Audio (For 4 heads Hi-Fi model)
X Value Adjustment (For 4 heads model)
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
Playback Torque, Back Tension Torque During Playback
Used to connect the test point of SERVICE and GROUND

MECHANICAL ADJUSTMENTS
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.)
When you activate the deck without the Cassette
Holder, short circuit between TP1001 and TP1002.
(Refer to ELECTRICAL ADJUSTMENT PARTS
LOCATION GUIDE)In this condition the BOT/EOT/
Reel Sensor will not function.
CONFIRMATION AND ADJUSTMENT OF
REEL DISK HEIGHT
1-1:
1.
2.
3.
4.
Turn on the power and set to the STOP mode.
Set the master plane (JG022) and reel disk height
adjustment jig (JG024A) on the mechanism framework,
taking care not to scratch the drum, as shown in
Fig. 1-1-A.
Confirm that "A" of the reel disk is lower than "B" of the
reel disk height adjustment jig (JG024A) , and is higher
than "C". If it is not enough height, adjust to 10(+0.2, -0)
mm with the height adjustment washer.
Adjust the other reel in the same way.
Reel Disk Height Adjustment Jig
(JG024A)
Fig. 1-1-A
Reel Disk
Height Adjustment
Washer
2.6x4.7xT0.13
2.6X4.7xT0.25
(B)
(C)
Master Plane (JG022)
Fig. 1-1-B
(A)
10(+0.2, -0)mm
Master Plane (JG022)
Reel Disk Height
Adjustment Jig
(JG024A)
(A)
Cut Position
Fig. 1-2-B
(B)
Tension Adjust
1-3:CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAYBACK
Load a video tape (T-120) recorded in standard speed
mode. Set the unit to the PLAY mode.
Install the tentelometer as shown in Fig. 1-3. Confirm that
the meter indicates 2 ±2gf in the beginning of playback.
1.
2.
• USING A CASSETTE TYPE TORQUE TAPE(JG100A)
1.
2.
3.
After confirmation and adjustment of Tension Post
position (Refer to item 1-2), load the cassette type
torque tape (JG100A)and set to the PLAY mode.
Confirm that the right meter of the torque tape indicates
60~110gf•cm during playback in SP mode.
Confirm that the left meter of the torque tape indicates
25~40gf•cm during playback in SP mode.
Tentelometer
Video Tape
Guide Roller
P1 Post Fig. 1-3
D1-1
1-2:CONFIRMATION AND ADJUSTMENT OF
TENSION POST POSITION
1.
2.
3.
Set to the PLAY mode.
Adjust the Tension Adjust until the edge of the Tension
Arm is positioning within 0.5mm range from the
standard line center of Main Chassis.
After this adjustment, confirm that the cut position is
located in "A" area as shown in Fig. 1-2-B If it is
located in "B" area, adjust again.
While turning the S Reel clockwise, confirm that the
edge of the Tension Arm is located in the position
described above.
Fig. 1-2-A
Standard line of Main Chassis
Tension Adjust
Tension Arm
0.5mm (Adjusting range)
Standard line center of Main Chassis

MECHANICAL ADJUSTMENTS
1-4: CONFIRMATION OF VSR TORQUE
Operate within 4~5 seconds after the reel disk begins to
turn.
Install the Torque Gauge (JG002F) and Adapter(JG002B)
on the S Reel. Set to the Rewind mode .(Refer to Fig.1-4)
Then, confirm that it indicates 120~180gf•cm.
1.
2.
3.
NOTE
Install the Torque Gauge on the reel disk firmly. Press the
REW button to turn the reel disk.
1-5: CONFIRMATION OF REEL BRAKE TORQUE
(S Reel Brake )(Refer to Fig. 1-4)
Set to the STOP mode.
Move the Idler Ass'y from the S Reel.
Install the Torque Gauge (JG002F) and Adapter
(JG002B) on the S Reel. Turn the Torque Gauge
(JG002F) clockwise.
Then, confirm that it indicates 60~100gf•cm.
1.
2.
3.
4.
(T Reel Brake )(Refer to Fig. 1-4)
Set to the STOP mode.
Move the Idler Ass'y from the T Reel.
Install the Torque Gauge (JG002E) and Adapter
(JG002B)on the T reel. Turn the Torque Gauge
(JG002E) counterclockwise.
Then, confirm that it indicates 45~70gf•cm.
1.
2.
3.
4.
Fig. 1-4
NOTE
If the torque is out of the range, replace the following
parts.
Check item
1-4
1-5
Replacement Part
Idler Ass'y/Clutch Ass'y
T Brake Spring/Tension Spring
2.CONFIRMATION 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
Playback the VHS Alignment Tape (JG001 or JG001B).
(Refer to SERVICING FIXTURE AND TOOLS)
Connect CH-1 of the oscilloscope TP4001
(Envelope) and CH-2 to TP1002 (SW Pulse).
Press and hold the Tracking-Auto button on the remote
control for more than 2 seconds to set tracking to center.
Trigger with SW Pulse and observe the envelope. (Refer
to Fig. 2-1-A)
When observing the envelope, adjust the Adjusting Driver
(JG005) slightly until the envelope will be flat.
Even if you press the Tracking Button, adjust so that
flatness is not moved so much.
Adjust so that the A : B ratio is better than 3 : 2 as shown in
Fig. 2-1-B,even if you press the Tracking Button to move
the envelope (The envelope waveform will begin to
decrease when you press the Tracking Button).
Adjust the PG shifter during playback.
(Refer to the ELECTRICAL ADJUSTMENTS)
1.
2.
3.
4.
5.
6.
7.
Torque Gauge/Adapter
(JG002F/JG002B)
T Reel
S Reel
Torque Gauge/Adapter
(JG002E/JG002B)
NOTE
After adjustment, confirm and adjust A/C head.
(Refer to item 2-2)
Fig. 2-1-A
Max
A : B≥3 : 2
A
Entrance Exit
Max
B
Fig. 2-1-B
CH-2
SW Pulse (TP1002)
CH-1
Track CH-2
Track
CH-1
Envelope
(TP4001)
Envelope
CH-3
Audio
(1)
(2)
D1-2

MECHANICAL ADJUSTMENTS
2-3:2-2:
When the Tape Running Mechanism does not work well,
adjust the following items.
CONFIRMATION AND ADJUSTMENT OF
AUDIO/CONTROL HEAD
1.
2.
3.
4.
When the height is not correct, turn the s 3to
adjust the height. Then, adjust the 1~3 again.
Playback the VHS Alignment Tape (JG001 or JG001B) .
(Refer to SERVICING FIXTURE AND TOOLS)
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)
b)
Turn the screw 2to set the audio level to maximum.
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 reflected picture is distorted, turn the screw
1clockwise until the distortion is disappeared.
When the reflected picture is not distorted, turn the
screw 1counterclockwise until little distortion is
appeared, then adjust the a).
P4 Post
Fig. 2-2-A
Audio/Control Head
1
3
2
Fig. 2-2-B
Audio/Control Head
Fig. 2-2-C
TAPE RUNNING ADJUSTMENT
(X VALUE ADJUSTMENT)
Confirm and adjust the height of the Reel Disk.
(Refer to item 1-1)
Confirm and adjust the position of the Tension Post.
(Refer to item 1-2)
Adjust the Guide Roller. (Refer to item 2-1)
Confirm and adjust the Audio/Control Head.
(Refer to item 2-2)
Connect CH-1 of the oscilloscope to TP4001, CH-2 to
TP1002 and CH-3 to HOT side of Audio Out Jack.
Playback the VHS Alignment Tape (JG001S or JG001T) .
(Refer to SERVICING FIXTURE AND TOOLS)
Press and hold the Tracking-Auto button on the remote
control for more than 2 seconds to set tracking to center.
Set the X Value adjustment driver (JG153) to the 4of
Fig. 2-2-B. Adjust X value so that the envelope waveform
output becomes maximum. Check if the relation between
Audio and Envelope waveform becomes (1) or (2) of
Fig. 2-1-A.
1.
2.
3.
4.
5.
6.
7.
8.
4
2-4: CONFIRM HI-FI AUDIO (Hi-Fi model only)
Connect CH-1 of the oscilloscope TP4001, CH-2 to
TP1002 and CH-3 to the Hi-Fi Audio Out Jack.
Playback the VHS Alignment Tape (JG001P or JG001Q).
(Refer to SERVICING FIXTURE AND TOOLS)
Press and hold the Tracking-Auto button on the remote
control for more than 2 seconds to set tracking to center.
Press the Tracking Up button and count number of steps
which the audio output is changed from Hi-Fi (10KHz) to
MONO (6KHz).
Press the Tracking Down button and count number of
steps which the audio output is changed from Hi-Fi
(10KHz) to MONO (6KHz).
Confirm that the difference between these counted steps
number in the above items are within 2 steps. If the
difference are more than 3 steps, do Tape Running
Adjustment again. (Refer to item 2-3)
1.
2.
3.
4.
5.
6.
D1-3
Reflected picture of
Stamp Mark
Audio/Control Head
Stamp Mark
Tape
0.25±0.05mm