Toshiba MV20Q41 Schematic

FILE NO. 140-200502

SERVICE MANUAL

COLOR TELEVISION/ VIDEO CASSETTE RECORDER

MV20Q41

Jan.,2005 O

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.

2. AVOID AN ELECTRIC SHOCK

There is a high voltage part inside. Avoid an electric shock while the electric current is flowing.

3. 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.

4. 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.

5. TAKE CARE TO DEAL WITH THE CATHODE-RAY TUBE

In the condition that an explosion-proof cathoderay tube is set in this equipment, safety is secured against implosion. However, when removing it or serving from backward, it is dangerous to give a shock. Take enough care to deal with it.

6. AVOID AN X-RAY1. KEEP THE NOTICES

Safety is secured against an X-ray by considering about the cathode-ray tube and the high voltage peripheral circuit, etc. Therefore, when repairing the high voltage peripheral circuit, use the designated parts and make sure not modify the circuit. Repairing except indicates causes rising of high voltage, and it emits an X-ray from the cathoderay tube.

PERFORM A SAFETY CHECK AFTER

7. 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.

(INSULATION CHECK PROCEDURE)

Unplug the plug from the AC outlet.

Remove the antenna terminal on TV and turn on the TV.

Insulation resistance between the cord plug terminals and the eternal exposure metal [Note 2] should be more than 1M ohm by using the 500V insulation resistance meter [Note 1].

If the insulation resistance is less than 1M ohm, the inspection repair should be required.

[Note 1]

If you have not the 500V insulation resistance meter, use a Tester.

[Note 2]

External exposure metal: Antenna terminal

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

TAPE REMOVAL METHOD AT NO POWER SUPPLY

Remove the VCR block from the main unit.

(Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.)

Remove the screw 1 of the Deck Chassis and remove the Loading Motor.

Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken the Video Tape.

Rotate the Clutch Ass'y either of the directions to wind the Video Tape in the Cassette Case.

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

Main Chassis (Front Side)

A1-2

ABOUT LEAD FREE SOLDER (PbF)

Distinction of PbF PCB:

PCBs (manufactured) using lead free solder will have a PbF printing on the PCB. (Please refer to figures.)

Caution:

Pb free solder has a higher melting point than standard solder;

•

Typically the melting point is 50°F~70°F(30°C~40°C) higher. Please use a soldering iron with temperature control and adjust it to 650°F ± 20°F (350°C ± 10°C). In case of using high temperature soldering iron, please be carefull not to heat too long. Pb free solder will tend to splash when heated too high (about 1100°F/ 600°C).

•

All products with the printed circuit board with PbF printing must be serviced with lead free solder.

•

When soldering or unsoldering, completely remove all of the solder from the pins or solder area, and be sure to heat the soldering points with the lead free solder until it melts sufficiently.

Recommendations

Recommended lead free solder composition is Sn-3.0Ag-0.5Cu.

A1-3

TABLE OF CONTENTS

SERVICING NOTICES ON CHECKING.....................................................................................

HOW TO ORDER PARTS ..........................................................................................................

TAPE REMOVAL METHOD AT NO POWER SUPPLY ............................................................

ABOUT LEAD FREE SOLDER (PbF)........................................................................................

TABLE OF CONTENTS..............................................................................................................

GENERAL SPECIFICATIONS ...................................................................................................

DISASSEMBLY INSTRUCTIONS

1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS............................................

2. REMOVAL OF VCR DECK PARTS ...................................................................................

3. REMOVAL OF ANODE CAP..............................................................................................

4. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ...............................................

KEY TO ABBREVIATIONS ........................................................................................................

SERVICE MODE LIST ................................................................................................................

PREVENTIVE CHECKS AND SERVICE INTERVALS..............................................................

WHEN REPLACING EEPROM (MEMORY) IC ..........................................................................

SERVICING FIXTURES AND TOOLS .......................................................................................

PREPARATION FOR SERVICING.............................................................................................

MECHANICAL ADJUSTMENTS ................................................................................................

ELECTRICAL ADJUSTMENTS..................................................................................................

BLOCK DIAGRAMS

TV ............................................................................................................................................

Y/C/AUDIO/HEAD AMP ..........................................................................................................

MICON/IN/OUT/AV.................................................................................................................

PRINTED CIRCUIT BOARDS

SYSCON/CRT .........................................................................................................................

SCHEMATIC DIAGRAMS

Y/C/AUDIO/HEAD AMP ..........................................................................................................

MICON .....................................................................................................................................

IN/OUT .....................................................................................................................................

AV ............................................................................................................................................

CHROMA/IF.............................................................................................................................

SOUND AMP ...........................................................................................................................

POWER ...................................................................................................................................

DEFLECTION..........................................................................................................................

CRT ..........................................................................................................................................

INTERCONNECTION DIAGRAM ...............................................................................................

WAVEFORMS .............................................................................................................................

MECHANICAL EXPLODED VIEWS...........................................................................................

CHASSIS EXPLODED VIEWS ...................................................................................................

MECHANICAL REPLACEMENT PARTS LIST .........................................................................

CHASSIS REPLACEMENT PARTS LIST..................................................................................

ELECTRICAL REPLACEMENT PARTS LIST...........................................................................

A1-1 A1-1 A1-2 A1-3 A2-1 A3-1~A3-5

B1-1, B1-2 B2-1~B2-6 B3-1 B4-1, B4-2 C1-1, C1-2 C2-1 C3-1, C3-2 C4-1 D1-1 D1-1 D2-1~D2-4 D3-1~D3-5

E-1, E-2 E-3, E-4 E-5, E-6

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 G-13, G-14 G-15, G-16 G-17, G-18 G-19, G-20 H-1, H-2 I1-1~I1-3 I2-1, I2-2 J1-1 J2-1 J3-1~J3-4

A2-1

GENERAL SPECIFICATIONS

G-1 TV CRT CRT Size / Visual Size 20 inch / 508.0 mmV

System CRT Type Normal

Color System NTSC Speaker 2Speaker

Sound Output MAX 0.75W + 0.75 W

G-2 VCR System VHS Player / Recorder

System Video System NTSC

Hi-Fi STEREO No NTSC PB Deck DECK OVD-7 Heads Video Head 2 Head

FM Audio Head No

Audio /Control Mono/Yes

Erase(Full Track Erase) Yes Tape Rec PAL Speed NTSC SP/SLP

Play PAL -

Fast Forward / Rewind Time (Approx.) at 25oC FF:4'50"/REW:2'30"

Forward/Reverse NTSC or PAL-M SP/SLP=3x,5x/9x,15x Picture Search PAL or SECAM Frame Advance Slow Speed -

G-3 Tuning Broadcasting System US System M

System Tuner and System 1Tuner

Receive CH Destination US(w/CABLE)

Intermediate Picture(FP) 45.75MHz Frequency Sound(FS) 41.25MHz

Preset CH Stereo/Dual TV Sound Tuner Sound Muting Yes

G-4 Signal Video Signal Input Level 1 V p-p/75 ohm

Audio Signal

Hi-Fi Audio Signal Dynamic Range : More than -

G-5 Power Power Source AC 120V 60Hz

Power Consumption at AC 86 W at 120V 60Hz

Protector Power Fuse Yes

G-6 Regulation Safety UL

Magnetic Field BV/BH +0.45G / 0.18G

Position Front Size 3 inch Impedance 8 ohm

10%(Typical) __

NTSC SP/SLP

with Cassette T-120

CH Coverage

FP-FS 4.5MHz

Output Level S/N Ratio (Weighted) 50dB Horizontal Resolution at SP Mode 220Lines Input Level Output Level S/N Ratio at SP (Weighted) 38dB

Harmonic Distortion at SP(1KHz) Typical 1.5 %

Frequency Response at SP 100Hz - 10kHz

at LP -

at SLP 100Hz - 4kHz

Frequency Response Wow And Flutter : Less than Channel Separation : More than Harmonic Distortion : Less than -

DC -

at DC Stand by (at AC) 5 W at 120V 60 Hz Per Year -

Safety Circuit Yes IC Protector(Micro Fuse) No Dew Sensor

Radiation FCC X-Radiation DHHS

2~69, 4A,A-5~A-1, A~I, J~W,W+1~W+84

No No

-8dBm/50k ohm

A3-1

GENERAL SPECIFICATIONS

Play/Stop/FF/Rew/Rec/OTR/T-Rec/Pause/Eject/Tape In

(Symbol

G-7 Temperature Operation +5oC ~ +40oC

G-8 Operating Humidity Less than 80% RH G-9 On Screen Menu Yes

Display Menu Type Icon

System Setup Yes

TV Setup Yes

Channel Setup Yes

V-chip Setup Yes Tape Setup Yes

G-CODE(or SHOWVIEW or PLUSCODE)No. Entry Clock Yes CH/AV(Line) Yes Tape Counter(Linear Counter) Yes Tape Speed Yes Sleep Time Yes Stereo/Audio Output

Control Volume Yes Level Bright / Contrast / Sharpness / Color Yes

Tint Yes Bass/Treble/Balance Manual Tracking Yes

Auto Tracking/Manual Tracking Yes Caption / Text Yes Index Yes Mute Yes Hi-Fi Repeat Yes Zero Return Yes DEW

G-10 OSD Language English French Spanish G-11 Clock,Timer Calendar 1990/1/1 ~ 2081/12/31

and Timer Timer Events 8 prog/ 1 month Back-up One Touch Recording Max Time 6 Hours

Sleep Timer Max Time 120

On/Off Timer Program(On Timer / Off Timer) 1 Auto Shut Off No Signal 15

Timer Back-up (at Power Off Mode) 5

Storage -20oC ~ +60oC

Clock Set Yes On/Off Timer Set Yes Auto Clock On/Off Yes Standard Time Yes Daylight Saving Time Yes

Language Yes Picture Yes Audio Picture Preference Yes

TV/CABLE Yes Auto CH Memory Yes Add/ Delete Yes

Timer Rec Set Yes Auto Repeat On/Off Yes

Bilingual SAP

Step 10

No Operation -

Yes

No No No

min. min. prog. min.

sec.

A3-2

GENERAL SPECIFICATIONS

G-12 Remote Unit RC-KF

Control Glow in Dark Remocon Yes

Remocon Format TOSHIBA Format TOSHIBA Custom Code 40-BFh , 44-BBh Power Source Voltage(D.C) 3V

Total Keys 47 Keys Power Yes

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 Volume Up Yes Volume Down Yes Up Yes Down Yes Left Yes Right Yes Input Select Yes Play Yes F.Fwd Yes Rew Yes Pause/Still Yes Stop Yes Index+ Yes Index- Yes

T-REC Rec/OTR

Eject Yes Counter Reset Yes Speed Yes TV Monitor Yes Quick View(Channel Return) Yes Program Yes Slow Auto Tracking(Digital Tracking) Yes Tracking+ Yes Tracking - Yes Menu Yes Enter Yes Cancel Yes Display Yes Closed Caption(TV/Caption/Text) Yes Sleep Timer Yes Mute Yes Zero Return Yes CM Skip(Skip Search) Yes Audio Select

Yes Yes

Keys

A3-3

GENERAL SPECIFICATIONS

G-13 Features Auto Head Cleaning

VIDEO PLUS+(SHOWVIEW,G-CODE) Auto Clock Yes Forward / Reverse Picture Search Yes One Touch Playback Auto CH Memory Yes Closed Caption Yes TV Auto Shut off Function Yes End Call Index Search Yes SQPB CABLE Yes CM Skip(30sec x 6 Times) Yes Comb Filter TV Monitor Yes Program Extend Choke Coil Energy Star Yes V-chip USA V-chip Yes

CANADA V-chip CM Advance Movie Advance Zero Return Yes Power On Memory Picture Preference Yes Auto Setup Yes Protect of FBT Leak Circuit Yes

G-14 Accessories Owner's Manual Language English

w/Guarantee Card Yes Remote Control Unit Yes Battery Yes

UM size x pcs UM-4 x 2 pcs

OEM Brand No Rod Antenna

Poles -

Terminal -

W/300 ohm to 75 ohm antenna adapter -

Loop Antenna

Terminal U/V Mixer 300 ohm to 75 ohm Antenna Adapter Yes Antenna Change Plug DC Car Cord (Center+) AC Plug Adapter AC Cord AV Cord (2Pin-1Pin) Guarantee Card Registration Card Yes ESP Card Warning Sheet Dew/AHC Caution Sheet Quick Set-up Sheet Circuit Diagram Service Facility List Important Safeguard Sheet Information (Return) Yes

No No

No No No

No No No No No No

No No No No No No No

A3-4

GENERAL SPECIFICATIONS

G-15 Interface Switch Power Yes

Indicator Power

Key Light up Rec/OTR

Terminals Front Video Input RCA x 1

Rear Video Input

G-16 Set Size Approx. W x D x H (mm) 502 x 488.7 x 513 G-17 Weight Net (Approx.) 22.0 kg( 48.5 lbs)

G-18 Carton Master Carton

Gift Box Material Double/White

Drop Test Natural Dropping At

Container Stuffing(40' container) 240

G-19 Material Cabinet Front PS 94V0 DECABROM

PCB Non-Halogen Demand No

G-20 Environment Pb-free Soldering Yes

Parts Specificat Yes

Play Yes

Pause/Still

One Touch Playback

Channel Up Yes

Channel Down Yes

F.FWD/Cue Yes

Eject/Stop Yes

Main Power SW

Volume Up Yes

Volume Down Yes

Rew/Rev Yes

Rec/OTR Yes

Input Select

Rec/OTR Yes (Red)

T-Rec Yes (Red)

On Timer

One Touch Playback

Play

Audio Input RCA x 1

Other Terminal Head Phone(Stereo & Mono, 3.5mm)

Audio Input

Video Output

Audio Output

Euro Scart

Diversity

Ext Speaker

DC Jack 12V(Center +)

VHF/UHF Antenna Input

AC Inlet

Gross (Approx.) 24.0 kg( 52.9 lbs)

Content -

Material -

Dimensions W x D x H(mm) -

Description of Origin -

Dimensions W x D x H(mm) 594 x 569 x 620

Description of Origin Yes

Height (cm) 46

Rear PS 94V0 DECABROM

Jack Panel -

Eyelet Demand Yes

F Type

No No

No No No No No

No No No No No No No No

1 Corner / 3 Edges / 6 Surfaces

Sets

A3-5

DISASSEMBLY INSTRUCTIONS

1. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS

1-1: BACK CABINET (Refer to Fig. 1-1)

Remove the 7 screws 1.

Remove the AC cord from the AC cord hook 2.

Remove the Back Cabinet in the direction of arrow.

Front Cabinet

1-2: CRT PCB (Refer to Fig. 1-2) CAUTION: BEFORE REMOVING THE ANODE CAP,

DISCHARGE ELECTRICITY BECAUSE IT CONTAINS HIGH VOLTAGE. BEFORE ATTEMPTING TO REMOVE OR REPAIR ANY PCB, UNPLUG THE POWER CORD FROM THE AC SOURCE.

Remove the Anode Cap. (Refer to REMOVAL OF ANODE CAP)

Disconnect the following connector: (CP801).

Remove the CRT PCB in the direction of arrow.

Back Cabinet

Fig. 1-1

1-3: TV/VCR BLOCK (Refer to Fig. 1-3)

Remove the 2 screws 1.

Disconnect the following connectors: (CP352, CP354 and CP502).

Unlock the support 2.

Remove the TV/VCR Block in the direction of arrow.

Front Cabinet

TV/VCR Block

1-4: DECK SHIELD PLATE (Refer to Fig. 1-4)

Remove the 2 screws 1.

Remove the screw 2.

Remove the Deck Shield Plate in direction of arrow.

Deck Shield Plate

UP TO RELEASE

Fig. 1-3

Front Cabinet

CRT PCB

TV/VCR Block

Fig. 1-4

Fig. 1-2

B1-1

DISASSEMBLY INSTRUCTIONS

1-5: DECK CHASSIS (Refer to Fig. 1-5) NOTE

Do not remove the cable at the FE Head section. The FE Head may be damaged if you remove the cable by force.

Remove the screw 1.

Remove the FE Head.

Remove the 3 screws 2.

Disconnect the following connectors: (CP1001, CP4001, CP4002 and CP4003).

Remove the Deck Chassis in the direction of arrow.

FE Head

Deck Chassis

Syscon PCB

1-6: SYSCON PCB (Refer to Fig. 1-6)

1.2.Remove the screw 1.

Remove the Syscon PCB in the direction of arrow.

Syscon PCB

Deck Holder

Fig. 1-5

Fig. 1-6

B1-2

DISASSEMBLY INSTRUCTIONS

2. REMOVAL OF VCR DECK PARTS

2-1: TOP BRACKET (Refer to Fig. 2-1)

Extend the 2 supports 1.

Slide the 2 supports 2 and remove the Top Bracket.

NOTE

After the installation of the Top Bracket, bend the support

1 so that the Top Bracket is fixed.

Top Bracket

Main Chassis

2-2: CASSETTE HOLDER ASS'Y (Refer to Fig. 2-2)

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.

Cassette Side R

Main Chassis

Locker R

Fig. 2-1

2-3: LINK UNIT (Refer to Fig. 2-3)

Set the Link Unit to the Eject position.

Unlock the support 1.

Remove the (A) side of the Link Unit first, then remove the (B) side.

Main Chassis

Link Unit

(A)

(B)

Link Unit

Main Chassis

2-4: LINK LEVER/FLAP LEVER/BOT COVER

(Refer to Fig. 2-4)

Unlock the support 1.

1. Remove the BOT Cover.

2. Extend the support 2.

3. Remove the Link Lever.

4. Remove the Flap Lever.

Fig. 2-3

Link Unit

Cassette Side L

Main Chassis

Fig. 2-2

Flap Lever

BOT Cover

Link Lever

Fig. 2-4

B2-1

DISASSEMBLY INSTRUCTIONS

2-5: LOADING MOTOR/WORM (Refer to Fig. 2-5-A)

Remove the screw 1.

Remove the Loading Motor.

Remove the Worm.

Loading Motor

Worm

Main Chassis

• Screw Torque: 3 ± 0.5kgf•cm

Fig. 2-5-A

NOTE

In case of the Worm installation, check if the value of the Fig. 2-5-B is correct.

In case of the Loading Motor installation, hook the wire on the Cassette Opener as shown Fig. 2-5-C.

When installing the wires between Capstan DD Unit and Loading Motor, connect them correctly as shown Fig. 2-5-D.

19.2 ± 0.1mm

2-6: TENSION ASS’Y (Refer to Fig. 2-6-B)

Turn the Pinch Roller Cam clockwise so that the Tension Holder hook is set to the position of Fig. 2-6-A to move the Tension Arm Ass’y.

Remove the Tension Spring.

Unlock the 2 supports 1 and remove the Tension Band.

Unlock the support 2 and remove the Tension Arm Ass’y.

Unlock the support 3 and remove the Tension Connect.

Float the hook 4 and turn it clockwise then remove the Tension Holder.

Tension Arm Ass’y

Fig. 2-6-A

Tension Connect

Tension Spring

Tension Holder

Tension Band

Tension Arm Ass’y

Loading Motor

Safety surface for pressing of the insert.

Pink

White

Fig. 2-5-B

Loading Motor

Cassette Opener

Fig. 2-5-C

Capstan DD Unit

Fig. 2-5-D

B2-2

Fig. 2-6-B

NOTE

In case of the Tension Band installation, note the direction of the installation. (Refer to Fig. 2-6-C)

In case of the Tension Band installation, install correctly as Fig. 2-6-D.

In case of the Tension Connect installation, install as the circled section of Fig. 2-6-E.

Tension Connect

Tension Band

Fig. 2-6-C

[OK]

[NG]

Tension Connect

DISASSEMBLY INSTRUCTIONS

NOTE

Take care not to damage the gears of the S Reel and T

Tension Band

Fig. 2-6-D

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. 2-8-A) Do not adhere the stains on it.

When you install the reel, clean the shaft and grease it. (If you do not grease, noise may be heard in FF/REW mode.)

After installing the reel, adjust the height of the reel.

(Refer to MECHANICAL ADJUSTMENT)

Main Chassis

Fig. 2-6-E

2-7: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-7-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.

T Brake Band

Hook section

T Brake Arm

T Brake Spring

Fig. 2-7-A

NOTE

1. In case of the T Brake Band installation, install correctly as Fig. 2-7-B.

Idler Gear

Idler Arm Ass’y

S Reel

(A)

(B)

T Reel

(A)

Fig. 2-8-A

NOTE

1.2.In case of the S Reel and T Reel installation, check if the correct parts are installed. (Refer to Fig. 2-8-B) In case of the Idler Arm Ass’y installation, install correctly as Fig. 2-8-C. And also set it so that the section “B” of Fig. 2-8-A is placed under the Main Chassis tab.

[OK]

T Brake Band

[NG]

T Brake Band

T Brake Arm

Fig. 2-7-B

2-8: S REEL/T REEL/IDLER ARM ASS’Y/IDLER GEAR

(Refer to Fig. 2-8-A)

Remove the S Reel and T Reel.

Remove the 2 Polyslider Washers 1.

Remove the Idler Arm Ass’y and Idler Gear.

B2-3

[OK]

[NG]

Clutch Gear

Big Hole (S Reel)

Small Hole (T Reel)

Fig. 2-8-B

Idler Arm Ass’y

Fig. 2-8-C

DISASSEMBLY INSTRUCTIONS

2-9: CASSETTE OPENER/PINCH ROLLER BLOCK/P5

ARM ASS’Y (Refer to Fig. 2-9-A)

1.2.Unlock the support 1 and remove the Cassette Opener. Remove the Pinch Roller Block and P5 Arm Ass’y.

Cassette Opener

Pinch Roller Block

P5 Arm Ass’y

Main Chassis

Fig. 2-9-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. 2-9-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. 2-9-B

2-10: A/C HEAD (Refer to Fig. 2-10-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.

NOTE

Do not touch the A/C Head. (Use gloves.)

When you install the A/C Head Spring, install as shown in Fig. 2-10-B.

When you install the A/C Head, tighten the screw (1) first, then tighten the screw (2), finally tighten the screw (3).

Spring Position

Fig. 2-10-B

2-11: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-11)

Remove the screw 1.

1. Remove the FE Head.

FE Head

• Screw Torque: 5 ± 0.5kgf•cm

• The FE Head is not installed on the Video Cassette Player.

Fig. 2-11

2-12: CYLINDER UNIT ASS'Y (Refer to Fig. 2-12)

Disconnect the following connector:

1. (CD2001) Remove the 3 screws 1.

2. Remove the Cylinder Unit Ass'y.

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)

(2)

• Screw Torque: 5 ± 0.5kgf•cm (Screw 1)

(3)

A/C Head

A/C Head Spring

A/C Head Base

Fig. 2-10-A

B2-4

• Screw Torque: 3 ± 0.5kgf•cm

(3)

(2)

(1)

Fig. 2-12

DISASSEMBLY INSTRUCTIONS

2-13: CAPSTAN DD UNIT (Refer to Fig. 2-13-A)

Remove the Capstan Belt.

Remove the 3 screws 1.

Remove the Capstan DD Unit.

Capstan Belt

Capstan DD Unit

• Screw Torque: 4 ± 0.5kgf•cm

Fig. 2-13-A

NOTE

1. In case of the Capstan DD Unit installation, apply the silicon bond (TSE3843-W) on the position Fig. 2-13-B correctly. (If no silicon bond applied, abnormal noise will be heard on the deck operation.)

(Refer to Fig. 2-13-B, C)

Applied position of silicon bond

Part Name: TSE3843-W Part No.: Y118011000

2-14: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR

(Refer to Fig. 2-14-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.

Main Cam

Pinch Roller Cam

Joint Gear

Fig. 2-14-A

NOTE

1. In case of the Pinch Roller Cam and Main Cam installation, install them as the circled section of Fig. 2-14-B so that the each markers are met. (Refer to Fig. 2-14-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. 2-13-B

Fig. 2-13-C

2-15: LOADING GEAR S/T UNIT (Refer to Fig. 2-15-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.

Main Rod

Tension Lever

Main Loading Gear

Loading Arm S Unit

B2-5

Fig. 2-14-B

Loading Arm T Unit

Fig. 2-15-A

DISASSEMBLY INSTRUCTIONS

NOTE

1. When you install the Loading Arm S Unit, Loading Arm T Unit and Main Loading Gear, align each marker. (Refer

to Fig. 2-15-B)

Marker

Main Loading Gear

Marker

Loading Arm T Unit Loading Arm S Unit

Fig. 2-15-B

2-16: CLUTCH ASS’Y/RING SPRING/CLUTCH LEVER/

CLUTCH GEAR (Refer to Fig. 2-16-A)

Remove the Polyslider Washer 1.

Remove the Clutch Ass’y and Ring Spring.

Remove the Clutch Lever.

Remove the Coupling Gear, Coupling Spring and Clutch Gear.

2-17:

CASSETTE GUIDE POST/INCLINED BASE S/T UNIT/P4 CAP/LED REFLECTOR (Refer to Fig. 2-17-A)

Remove the P4 Cap.

1. Unlock the support 1 and remove the Cassette Guide

2. Post. Remove the Inclined Base S/T Unit.

3. Remove the screw 2.

4. Remove the LED Reflector.

Inclined Base S Unit

LED Reflector

Cassette Guide Post

Inclined Base T Unit

P4 Cap

Clutch Ass’y

Ring Spring

Coupling Gear

Coupling Spring

Clutch Gear

Clutch Lever

Fig. 2-16-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. 2-16-B)

Clutch Ass’y

Fig. 2-17-A

NOTE

Do not touch the roller of Guide Roller.

In case of the P4 Cap installation, install it with parallel for “A” and “B” of Fig. 2-17-B.

In case of the Cassette Guide Post installation, install correctly as the circled section of Fig. 2-17-C.

“A” “B”

P4 Cap

Cassette Opener

Fig. 2-17-B

[OK]

Cassette Guide Post

Coupling Gear

Fig. 2-16-B

[NG]

Cassette Guide Post

Fig. 2-17-C

B2-6

DISASSEMBLY INSTRUCTIONS

3. REMOVAL OF ANODE CAP

Read the following NOTED items before starting work.

After turning the power off there might still be a potential

voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap's potential voltage.

Do not use pliers to loosen or tighten the Anode Cap terminal, this may cause the spring to be damaged.

REMOVAL

1. Follow the steps as follows to discharge the Anode Cap.

(Refer to Fig. 3-1.)

Connect one end of an Alligator Clip to the metal part of a flat-blade screwdriver and the other end to ground. While holding the plastic part of the insulated Screwdriver, touch the support of the Anode with the tip of the Screwdriver. A cracking noise will be heard as the voltage is discharged.

GND on the CRT

3. After one side is removed, pull in the opposite direction to remove the other.

NOTE

Take care not to damage the Rubber Cap.

INSTALLATION

1. Clean the spot where the cap was located with a small amount of alcohol. (Refer to Fig. 3-3.)

NOTE

Confirm that there is no dirt, dust, etc. at the spot where the cap was located.

Location of Anode Cap

Fig. 3-3

Screwdriver

Alligator Clip

GND on the CRT

Flip up the sides of the Rubber Cap in the direction of the

2. arrow and remove one side of the support.

(Refer to Fig. 3-2.)

Rubber Cap

Support

CRT

Fig. 3-1

2.3.Arrange the wire of the Anode Cap and make sure the wire is not twisted. Turn over the Rubber Cap. (Refer to Fig. 3-4.)

Fig. 3-4

4. Insert one end of the Anode Support into the anode button, then the other as shown in Fig. 3-5.

CRT

Support

Fig. 3-2

Support

CRT

5.6.Confirm that the Support is securely connected. Put on the Rubber Cap without moving any parts.

B3-1

Fig. 3-5

DISASSEMBLY INSTRUCTIONS

4. 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. 4-1.) 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. 4-2.)

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.

Fig. 4-1

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. 4-3.)

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

4.5.Peel off the Masking Tape. Absorb the solder left on the pattern using the Braided Shield Wire. (Refer to Fig. 4-4.)

NOTE

Do not move the Braided Shield Wire in the vertical direction towards the IC pattern.

Fig. 4-3

Braided Shield Wire

Soldering Iron

Fig. 4-2

IC pattern

Fig. 4-4

B4-1

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. 4-5.)

Soldering Iron

Solder temporarily

Fig. 4-5

2. Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads. (Refer to Fig. 4-6.)

4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 4-8.)

Thin-tip Soldering Iron

Fig. 4-8

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, always be sure to replace the IC in this case.

Solder

Supply soldering from upper position to lower position

Soldering Iron

Fig. 4-6

3. Absorb the solder left on the lead using the Braided Shield Wire. (Refer to Fig. 4-7.)

NOTE

Do not absorb the solder to excess.

Soldering Iron

Braided Shield Wire

Fig. 4-7

B4-2

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

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, Flip-flop

Frequency Generator

Front Loading Switch

Frequency Modulation

Frequency Sub Carrier

Forward

Generator

Ground

H.P.F 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

High Pass Filter

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

C1-1

STB SW 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

KEY TO ABBREVIATIONS

Serial Strobe

Switch

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

SERVICE MODE LIST

This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter SERVICE MODE, unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon

key simultaneously. The both pressing of set key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC

cord and allow at least 5 seconds before Power On.

Set

Condition

TV mode

VCR mode (Playback)

TV mode

ALL mode

Set Key Operations

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

VOL. DOWN

(Minimum)

Remocon

Key

0 2 sec.

1 2 sec.

2 2 sec.

3 2 sec.

4 2 sec.

5 2 sec.

6 2 sec.

9 2 sec.

Standard

Time

Releasing of V-CHIP PASSWORD.

Initialization of the factory on TV. NOTE:

Horizontal position adjustment of OSD. NOTE: Also can be adjusted by using the Adjustment MENU. Refer to the "ELECTRICAL ADJUSTMENT" (OSD HORIZONTAL).

Adjust the PG SHIFTER automatically. Refer to the "ELECTRICAL ADJUSTMENT" (PG SHIFTER).

Adjust the PG SHIFTER manually. Refer to the "ELECTRICAL ADJUSTMENT" (PG SHIFTER).

Adjusting of the Tracking to the center position. NOTE:

POWER ON total hours and PLAY/REC total hours are displayed on the screen. Refer to the "PREVENTIVE CHECKS AND SERVICE INTERVALS" (CONFIRMATION OF USING HOURS).

Can be checked of the INITIAL DATA of MEMORY IC. Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".

Display of the Adjustment MENU on the screen. Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).

Do not use this for the normal servicing. If you set a factory initialization, the memories are reset such as the channel setting, POWER ON total hours and PLAY/REC total hours.

Also can be adjusted by pressing the ATR button for more than 2 seconds during PLAY.

Method

Make the short circuit between the test point of SERVICE and the GND.

Operations

The BOT, EOT, and the Reel Sensor do not work and the deck can be operated without a cassette tape. Refer to the "PREPARATION FOR SERVICING"

C2-1

PREVENTIVE CHECKS AND SERVICE INTERVALS

The following standard table depends on environmental conditions and usage. Parts replacing time does not mean the life span for individual parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. The following list means standard hours, so the checking hours depends on the conditions.

Time

Parts Name

Audio Control Head

Full Erase Head

(Recorder only)

Capstan Belt

Pinch Roller

Capstan DD Unit

Loading Motor

Tension Band T Brake Band

Clutch Ass’y

Idler Arm Ass’y

Capstan Shaft

Tape Running Guide Post

Cylinder Unit

: Clean : Check it and if necessary, replace it.

500

hours

1,000 hours

1,500 hours

2,000 hours

2,500 hours

Notes

Clean those parts in contact with the tape.

Clean the rubber, and parts which the rubber touches.

Replace when rolling becomes abnormal.

Clean the Head

CONFIRMATION OF HOURS USED

POWER ON total hours and PLAY/REC total hours can be checked on the screen. Total hours are displayed in 16 system of notation.

NOTE: If you set a factory initialization, the total hours is reset to "0".

The confirmation of using hours will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On.

Set the VOLUME to minimum.

Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.

After the confirmation of using hours, turn off the power.

INIT 00 08

POWER ON 0010

PLAY/REC 0003

(16 x 16 x 16 x thousands digit value) + (16 x 16 x hundreds digit value) + (16 x tens digit value) + (ones digit value)

Initial setting content of MEMORY IC. POWER ON total hours.

PLAY/REC total hours.

C3-1

PREVENTIVE CHECKS AND SERVICE INTERVALS

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.

Audio Control Head

Cylinder Head

C3-2

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