MEMOREX MVR2031 Service Manual
MVR2031
SERVICE MANUAL
VIDEO CASSETTE RECORDER
ORIGINAL
MFR’S VERSION A
Design and specifications are subject to change without notice.
SERVICING NOTICES ON CHECKING
1. KEEP THE NOTICES 3. PUT PARTS AND WIRES IN THE
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.
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.
!
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.
PERFORM A SAFETY CHECK AFTER
4.
SERVICING
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.
HOW TO ORDER PARTS
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.
A1-1
CONTENTS
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/CCD/HEAD AMP ....................................................................................................
SYSTEM CONTROL/SERVO.....................................................................................................
TUNER........................................................................................................................................
OPERATION/POWER ................................................................................................................
PRINTED CIRCUIT BOARDS
SYSCON/OPERATION ..............................................................................................................
SCHEMATIC DIAGRAMS
Y/C/AUDIO/CCD/HEAD AMP ....................................................................................................
SYSTEM CONTROL/SERVO.....................................................................................................
POWER ......................................................................................................................................
OPERATION...............................................................................................................................
TUNER........................................................................................................................................
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~B2-6
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
E-7, E-8
F-1 ~ 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
H-1
I-1
I-2, I-3
J1-1
J2-1
J3-1
A2-1
GENERAL SPECIFICATIONS
G-1 VCR System VHS Player / Recorder
G-2 Tuning Broadcasting System US System M
G-3 Power Power Source AC 120V,60Hz
G-4 Regulation Safety UL
G-5 Temperature Operation 5oC - 40oC
G-6 Operating Humidity Less then 80% RH
G-7 Signal Video Signal Input Level 1 V p-p/75 ohm
G-8 On Screen Menu Yes
System Video System NTSC
System Tuner and System 1Tuner
Display Menu Type Character
Hi-Fi STEREO No
NTSC PB(PAL60Hz) No
Deck DECK OVD-7
Heads Video Head 4Head
FM Audio Head No
Normal Audio /Control Mono / Yes
Erase(Full Track Erase) Yes
Tape Rec PAL Speed NTSC SP/SLP
Play PAL -
Fast Forward / Rewind Time (Approx.) FF:4'50"/REW:2'30"
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
Receive CH Destination USA(w/CATV)
Intermediate Picture(FP) 45.75MHz
Frequency Sound(FS) 41.25MHz
Preset CH No
RF Converter Output Yes
Channel 3 or 4 ch
Level/Impedance 66dBu /75ohm
Sound Selector No
Stereo/Dual TV Sound No
Power Consumption Power On(at AC) 8W at 120V 60Hz
Protector Power Fuse Yes
Audio Signal Input Level -8dB/50Kohm
(0dB=0.775Vrms) Output Level -8dB/1Kohm
Hi-Fi Audio Signal Dynamic Range : More than -
ATS No
Timer Rec Set Yes
Auto Repeat On/Off Yes
SAP On Off No
CH Set-Up Yes
Loading System Front
Motor 3
NTSC SP/LP/SLP
with Cassette T-120
Tuning System F-Synth
Input Impedance VHF/UHF 75 OHM
CH Coverage
FP-FS 4.50MHz
DC -
Stand by (at AC) 1.8W at 120V 60Hz
Per Year - kWh/Year
Dew Sensor No
Radiation FCC
Storage -20oC - 60oC
Output Level 1 V p-p/75 ohm
S/N Ratio (Weighted) 50
Horizontal Resolution at SP Mode 230Line
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
Frequency Response Wow And Flutter : Less than Channel Separation : More than Harmonic Distortion : Less than -
TV/CATV Yes
Auto CH Memory Yes
Add/Delete Yes
2-69,4A,A-5~ A-1,A~I, J~ W
W+1~W+84
A3-1
GENERAL SPECIFICATIONS
(
Pin Code Registration No
System Set-Up No
Clock Set Yes (Calendar 12H)
Language Yes
G-CODE(or SHOWVIEW or PLUSCODE)No. Entry No
NICAM 1/2,NICAM Off,Audio Output No
Stereo,Audio Output,SAP No
Play/Stop/FF/Rew/Rec/OTR/T-Rec/Pause/Eject/Tape In (Symbol Mark)
G-9 OSD Language English French Spanish
G-10 Clock,Timer Calendar 1990/1/1 ~ 2081/12/31
and Timer Timer Events 8 prog/1 month
Back-up One Touch Recording Max Time 5 Hours
OTPB Valid Time No
Timer Back-up (at Power Off Mode) 5 sec.
G-11 Display Indicator No
Indicator Type -
G-12 Remote Unit RC-EA
Control Glow in Dark Remocon No
Power Source Voltage(D.C) 3V
Total Keys 32 Keys
Keys Power Yes
No Noise Back Ground Yes
Yes
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
OSD Language Setting English
Clock/Counter,CH,Timer Rec,OTR, Play
Cue),Rew(Rev),Stop,ATR
Rec,FF
Pause("Rec"Flash) Still("Play"Flush) Eject(Tape Mark Flash) Slow WKL,Y.M.D,Start,End AFT Repeat A-DUB VCR Memory Index VPS PDC SP LP SLP AM PM -
F1,F2
RF Output CH -
UM size x pcs UM-4 x 2 pcs
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
-
-
A3-2
GENERAL SPECIFICATIONS
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 No
Zero Return No
CM Skip No
G-13 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-14 Accessories Owner's Manual Language English/Spanish
Remote Control Unit Yes
Dew Cation Sheet No
Video Cassette Tape No
Battery No
Audio Select No
w/Guarantee Card No
UM size x pcs -
Safety Tip No
Toll Free Insert Sheet No
Quick Set-Up Sheet No
Information Sheet (Buyer Supply) No
75 Ohm Coaxial Cable Yes(Single shield)
Rod Antenna No
Loop Antenna No
U/V Mixer No
DC Car Cord (Center+) No
Guarantee Card Yes
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
Poles
Terminal
Terminal
A3-3
GENERAL SPECIFICATIONS
AV Cord (2Pin-1Pin) No
Registration Card No
PTB Sheet No
Tape Rewinder(Buyer Supply) No
G-15 Interface Switch Front Power Yes
G-16 Set Size Approx. W x D x H (mm) 360 x 229 x 95
G-17 Weight Net (Approx.) 3.2kg(7.1lbs)
G-18 Carton Master Carton No
G-19 Cabinet Material Cabinet Front PS 94V2 DECABROM
300 ohm to 75 ohm Antenna Adapter No
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 Yes
Indicator Power Yes
Stand by No
Rec/OTR No
Repeat No
TV/VCR Yes
Rec Yes
T-Rec Yes
Tape In No
Terminals Front Video Input RCA x 1
Audio Input RCA x 1
Other Terminal No
Rear Video Input No
Audio Input No
Video Output RCA x 1
Audio Output RCA x 1
Euro Scart No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input F Type
AC Inlet No
Gross (Approx.) 3.8kg(8.4lbs)
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) 420x291x160
Design As Per BUYER 's
Description of Origin Yes
Drop Test Natural Dropping At 1Corner / 3Edges / 6Surfaces
Height (cm) 80
Container Stuffing(40' container) 3136Sets
A3-4
DISASSEMBLY INSTRUCTIONS
REMOVAL OF MECHANICAL PARTS
1.
AND P.C. BOARDS
1-1: TOP CABINET, FRONT CABINET AND
OPERATION PCB (Refer to Fig. 1-1)
1.
Remove the 4 screws 1.
2.
Remove the Top Cabinet in the direction of arrow (A).
3.
Disconnect the following connector: (CP651).
4.
Unlock the 7 supports 2.
5.
Remove the Front Cabinet in the direction of arrow (B).
6.
Remove the 3 screws 3 and remove the Operation PCB.
1
Top Cabinet
1
(A)
1
Front Cabinet
2
2
1-2: FLAP (Refer to Fig. 1-2)
1.2.Open Flap to 90˚ and flex in direction of arrow (A), at
the same time slide in direction of arrow (B).
Then lift in direction of arrow (C).
(B)
2
2
2
2
3
3
3
Operation PCB
Fig. 1-1
1-3: DECK CHASSIS (Refer to Fig. 1-3)
Remove the 3 screws 1.
1.
Disconnect the following connectors: (CP1001, CP4001,
2.
CP4002 and CP4003).
Remove the Deck Chassis in the direction of arrow.
3.
1
1
1
Deck Chassis
1
Bottom Plate
Fig. 1-3
1-4: SYSCON PCB AND JACK PLATE (Refer to Fig. 1-4)
Remove the screw 1.
1.
Remove the screw 2.
2.
Remove the Syscon PCB in the direction of arrow.
3.
2
(C)
(B)
(A)
Flap
Syscon PCB
1
Bottom Plate
Fig. 1-4
Fig. 1-2
B1-1
DISASSEMBLY INSTRUCTIONS
2. REMOVAL OF 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
1. After the installation of the Top Bracket, bend the
support 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)
Move the Cassette Holder Ass'y to the front side.
1.
Push the Locker R to remove the Cassette Side R.
2.
Remove the Cassette Side L.
3.
Main Chassis
Cassette Side R
1
Fig. 2-1
Locker R
NOTE
1.2.In case of the Locker R installation, check if the two
positions of Fig.2-3-B are correctly locked.
When you install the Cassette Side R, be sure to move
the Locker R after installing.
Locker R
Check if these
Cassette Side R
positions are locked.
Fig. 2-3-B
2-4: LINK UNIT (Refer to Fig. 2-4)
Set the Link Unit to the Eject position.
1.
Unlock the support 1.
2.
Remove the (A) side of the Link Unit first, then remove
3.
the (B) side.
Main Chassis
Link Unit
Link Ass'y
Cassette Side L
Main Chassis
Fig. 2-2
2-3: CASSETTE SIDE L/R (Refer to Fig. 2-3-A)
Remove the Locker Spring.
1.
Unlock the 4 supports 1 and then remove the Cassette
2.
Side L/R.
Unlock the support 2 and then remove the Locker R.
3.
Locker Spring
1
1
2
Cassette Holder
Locker R
1
1
(A)
1
(B)
Link Unit
Main Chassis
2-5: LINK LEVER/FLAP LEVER (Refer to Fig. 2-5)
Remove the Link Lever.
1.
Remove the Flap Lever.
2.
Flap Lever
Link Lever
Fig. 2-4
Fig. 2-5
Cassette Side R
Cassette Side L
Fig. 2-3-A
B2-1
DISASSEMBLY INSTRUCTIONS
2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A)
Remove the screw 1.
1.
Remove the Loading Motor.
2.
Remove the Worm.
3.
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.
19.2 ± 0.1mm
1
Tension Connect
Tension Spring
2
4
1
3
Tension Holder
Tension Band
Tension Arm Ass'y
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.
Safety surface for pressing
of the insert.
Fig. 2-6-B
2-7: TENSION ASS'Y (Refer to Fig. 2-7-B)
Turn the Pinch Roller Cam clockwise so that the
1.
Tension Holder hook is set to the position of Fig. 2-7-A
to move the Tension Arm Ass'y.
Remove the Tension Spring.
2.
Unlock the 2 supports 1 and remove the Tension
3.
Band.
Unlock the support 2 and remove the Tension Arm
4.
Ass'y.
Unlock the support 3 and remove the Tension
5.
Connect.
Float the hook 4 and turn it clockwise then remove the
6.
Tension Holder.
Tension Arm Ass'y
Tension Connect
[OK]
[NG]
Tension Connect
Tension Connect
Tension Connect
Main Chassis
Tension Band
Fig. 2-7-C
Tension Band
Tension Band
Fig. 2-7-D
Fig. 2-7-E
Fig. 2-7-A
B2-2
DISASSEMBLY INSTRUCTIONS
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
3.
Band.
Idler Gear
Idler Arm Ass'y
S Reel
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.
[OK]
T Brake Band
[NG]
T Brake Band
T Brake Arm
T Brake Arm
(A) 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.
Fig. 2-8-B
2-9: S REEL/T REEL/IDLER ARM ASS'Y/IDLER GEAR
(Refer to Fig. 2-9-A)
Remove the S Reel and T Reel.
1.
Remove the 2 Polyslider Washers 1.
2.
Remove the Idler Arm Ass'y and Idler Gear.
3.
NOTE
Take care not to damage the gears of the S Reel and T
1.
Reel.
The Polyslider Washer may be remained on the back of
2.
the reel.
Take care not to damage the shaft.
3.
Do not touch the section "A" of S Reel and T Reel. (Use
4.
gloves.) (Refer to Fig. 2-9-A) Do not adhere the stains
on it.
When you install the reel, clean the shaft and grease it
5.
(MG-33). (If you do not grease, noise may be heard in
FF/REW mode.)
After installing the reel, adjust the height of the reel.
6.
(Refer to MECHANICAL ADJUSTMENT)
[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
B2-3
DISASSEMBLY INSTRUCTIONS
2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/
P5 ARM ASS'Y (Refer to Fig. 2-10-A)
Unlock the support 1 and remove the Cassette
1.
Opener.
Remove the Pinch Roller Block and P5 Arm Ass'y.
2.
1
Cassette Opener
Pinch Roller Block
P5 Arm Ass'y
Main Chassis
Fig. 2-10-A
NOTE
Do not touch the Pinch Roller. (Use gloves.)
1.
In case of the Pinch Roller Block and the Pinch Roller
2.
Cam installation, install correctly as Fig. 2-10-B.
(3)(1)
2
2
(2)
1
• Screw Torque: 5 ± 0.5kgf•cm (Screw 1)
• Screw Torque: 4 ± 0.5kgf•cm (Screw 2)
Spring Position
2
A/C Head
A/C Head Spring
A/C Head Base
Fig. 2-11-A
Fig. 2-11-B
2-12: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12)
Remove the screw 1.
1.
Remove the FE Head.
2.
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)
Remove the screw 1.
1.
Remove the A/C Head Base.
2.
Remove the 3 screws 2.
3.
Remove the A/C Head and A/C Head Spring.
4.
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).
1
FE Head
• Screw Torque: 4 ± 0.5kgf•cm
• The FE Head is not installed on the Video Cassette Player.
Fig. 2-12
B2-4
DISASSEMBLY INSTRUCTIONS
2-13:AHC ASS'Y/CYLINDER UNIT ASS'Y
(Refer to Fig. 2-13)
Unlock the support 1 and remove the AHC Ass'y.
1.
Disconnect the following connector:
2.
(CD2001)
Remove the 3 screws 2.
3.
Remove the Cylinder Unit Ass'y.
4.
NOTE
When you install the Cylinder Unit Ass'y, tighten the
1.
screws from (1) to (3) in order while pulling the Ass'y
toward the left front direction.
Cylinder Unit Ass'y
1
(3)
(2)
(1)
• Screw Torque: 3 ± 0.5kgf•cm
2
2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14)
Remove the Capstan Belt.
1.
Remove the 3 screws 1.
2.
Remove the Capstan DD Unit.
3.
2
2
AHC Ass'y
Fig. 2-13
2-15:
MAIN CAM/PINCH ROLLER CAM/JOINT GEAR
(Refer to Fig. 2-15-A)
Remove the E-Ring 1, then remove the Main Cam.
1.
Remove the E-Ring 2, then remove the Pinch Roller
2.
Cam and Joint Gear.
1
Main Cam
2
Pinch Roller Cam
Joint Gear
Fig. 2-15-A
NOTE
In case of the Pinch Roller Cam and Main Cam
1.
installation, install them as the circled section of Fig. 215-B so that the each markers are met. (Refer to Fig.
2-15-B)
Pinch Roller Cam
Marker
Main Cam
• Screw Torque: 4 ± 0.5kgf•cm
Capstan Belt
Capstan DD Unit
Fig. 2-15-B
2-16: LOADING GEAR S/T ASS'Y (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
Ass'y and Loading Arm T Ass'y.
1
1
1
1
Fig. 2-14
Main Rod
Tension Lever
Main Loading Gear
Loading Arm T Ass'y
Loading Arm S Ass'y
Fig. 2-18-A
B2-5
DISASSEMBLY INSTRUCTIONS
NOTE
When you install the Loading Arm S Ass'y, Loading Arm
1.
T Ass'y and Main Loading Gear, align each marker.
(Refer to Fig. 2-16-B)
Marker
CASSETTE GUIDE POST/INCLINED BASE S/T
2-18:
UNIT/P4 CAP (Refer to Fig. 2-18-A)
Remove the P4 Cap.
1.
Unlock the support 1 and remove the Cassette Guide
2.
Post.
Remove the Inclined Base S Unit and Inclined Base T
3.
Unit.
Main Loading Gear
Marker
Loading Arm T Ass'y
2-17:
CLUTCH ASS'Y/RING SPRING/CLUTCH LEVER/
Loading Arm S Ass'y
CLUTCH GEAR (Refer to Fig. 2-17-A)
Remove the Polyslider Washer 1.
1.
Remove the Clutch Ass'y and Ring Spring.
2.
Remove the Clutch Lever.
3.
Remove the Coupling Gear, Coupling Spring and
4.
Clutch Gear.
1
Clutch Ass'y
Ring Spring
Coupling Gear
Coupling Spring
Clutch Lever
Fig. 2-16-B
Cassette Guide Post
Inclined Base T
Unit
P4 Cap
Inclined Base S
Unit
1
Fig. 2-18-A
NOTE
Do not touch the roller of Guide Roller.
1.
In case of the P4 Cap installation, install it with parallel
2.
for "A" and "B" of Fig. 2-18-B.
In case of the Cassette Guide Post installation, install
3.
correctly as the circled section of Fig. 2-18-C.
"A"
"B"
Clutch Gear
Fig. 2-17-A
NOTE
In case of the Clutch Ass'y installation, install it with
1.
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
B2-6
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
Put the Masking Tape (cotton tape) around the Flat
1.
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.
When IC starts moving back and forth easily after
3.
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
Masking Tape
(Cotton Tape)
Heat the IC leads using a blower type IC desoldering
2.
IC
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.
Blower type IC
desoldering machine
Fig. 3-1
Tweezers
IC
Fig. 3-3
Peel off the Masking Tape.4.
Absorb the solder left on the pattern using the Braided
5.
Shield Wire. (Refer to Fig. 3-4.)
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Braided Shield Wire
Soldering Iron
IC
Fig. 3-2
IC pattern
Fig. 3-4
B3-1
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