Toshiba MV20FL4 Schematic

FILE NO. 140-200116

SERVICE MANUAL

COLOR TELEVISION/ VIDEO CASSETTE RECORDER

MV20FL4

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

Earphone jack

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.

GENERAL SPECIFICATIONS

J~W,

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

G-2 VCR System VHS Player / Recorder

G-3 Tuning Broadcasting System US System M

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

G-5 Power Power Source AC 120V,60Hz

G-6 Regulation Safety UL

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

G-8 Operating Humidity Less then 80% RH

System CRT Type Flat

Color System NTSC Speaker 2 Speaker

Sound Output MAX 1.5W + 1.5W

System Video System NTSC

Hi-Fi STEREO Yes NTSC PB No Deck DECK OVD-6S

Heads Video Head 4 Head

FM Audio Head 2 Head

Audio /Control Mono /Yes

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

Play PAL -

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

Forward/Reverse NTSC or PAL-M SP/SLP(EP) = 3x,5x / 9x,15x Picture Search Frame Advance 1/10 Slow Speed 1/10

System Tuner and System 1 Tuner

Receive CH Destination US(w/CATV)

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

Preset CH Stereo/Dual TV Sound US-ST Tuner Sound Muting Yes

Audio Signal (0dB=0.775Vrms)

Hi-Fi Audio Signal Dynamic Range : More than 90 dB

Power Consumption at AC 115 W at 120 V 60 Hz

Protector Power Fuse Yes

Deflection 90 degree Magnetic Field BV/BH + 0.45 G / 0.18 G

Position Front Size 3 Inch Impedance 8 ohm

10%(Typical) 1.5W + 1.5W

Loading System Front Motor 3

NTSC SP/SLP(EP)

with Cassette T-120

Tuning System F-Synth Input Impedance VHF/UHF 75 ohm

CH Coverage

FP-FS 4.5MHz

Output Level 1 V p-p/75 ohm S/N Ratio (Weighted) 50 Horizontal Resolution at SP Mode 220Line Input Level Output Level S/N Ratio at SP (Weighted) 38 Harmonic Distortion (1KHz) 1.5 %

Frequency Response at SP 100Hz - 10kHz

at LP -

at SLP 100Hz - 4kHz

Wow And Flutter : Less than 0.01 %Wrms Channel Separation : More than 60 dB Harmonic Distortion : Less than 1.0 %

DC -

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

Dew Sensor

Radiation FCC X-Radiation DHHS

Storage -20oC ~ +60oC

-8dB/50Kohm

-8dB/1Kohm

2~69, 4A,A-5~A-1, A~I,

W+1~W+84

GENERAL SPECIFICATIONS

ark)

G-9 On Screen Menu Yes

G-10 OSD Language English French Spanish

G-11 Clock,Timer Calendar 1990/1/1 ~ 2081/12/31

Display Menu Type Character

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

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

Play

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

and Timer Timer Events 8 Program/ 1 Month Back-up One Touch Recording Max Time 5 Hours

OTPB Valid Time 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

Timer Rec Set Yes Channel Setup Yes

TV/CATV Yes Auto CH Memory Yes Add/ Delete Yes Guide CH Set

TV Setup Yes

V-chip Set Yes On/Off Timer Set Yes Picture Yes Audio Yes Sap On/Off Yes

Auto Repeat On/Off Yes System Setup Yes

Clock Set Yes (Calendar 12h) Language Yes Auto Clock On/Off Yes Standard Time Yes Daylight Saving Time Yes

Commercial Advance

Marking On/Off Blueback On/Off Playback Auto/Manual Unmarked Tape

Movie Advance

Go To Movie Go To Preview

Bilingal SAP Yes

Tint Yes Bass/Treble/Balance Yes Manual Tracking Yes

top/FF/Rew/Rec/OTR/T-Rec/Pause/Eject/Tape In (Symbol

OSD Language Setting English

Step 10

No Operation

No No No No No No No No No

Yes

No No

No Min Min Program Min No Sec

GENERAL SPECIFICATIONS

G-12 Remote Unit RC-DQ

Control Glow in Dark Remocon Yes

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

UM size x pcs UM-4 x 2 pcs

Total Keys 44 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 Volume Up Yes Volume Down Yes Input Select Yes Play Yes F.Fwd Yes Rew Yes Pause/Still Yes Stop Yes Rec/OTR Yes(2Keys) Eject Yes Counter Reset Yes Speed Yes Timer Rec Yes(2Keys) TV Monitor Quick View Yes Program Yes Slow Yes Auto Tracking Yes Set/Tracking+ Yes Set/ Tracking - Yes Menu Yes Enter Yes Cancel Yes Call Yes TV/Caption/Text Yes Sleep Timer Yes Muting Yes Zero Return Yes CM Skip Yes Audio Select Yes

G-13 Features Auto Head Cleaning Yes

Auto Tracking Yes HQ (VHS Standard High Quality) Yes Auto Power On, Auto Play, Auto Rewind, Auto Eject Yes VIDEO PLUS+(SHOWVIEW,G-CODE) Auto Clock Yes Forward / Reverse Picture Search Yes Reverse Slow One Touch Playback Auto CH Memory Yes Closed Caption Yes TV Auto Shut off Function Yes End Call Index Search SQPB CATV Yes CM Skip(30sec x 6 Times) Yes Comb Filter Yes TV Monitor Program Extend Choke Coil Energy Star Yes Protect of FBT Leak Curcuit Yes Dirty Head V-chip USA V-chip Yes

CANADA V-chip CM Advance Movie Advance

Keys

No No

No No No

GENERAL SPECIFICATIONS

G-14 Accessories Owner's Manual Language English

Remote Control Unit Yes Battery Yes

Rod Antenna

Loop Antenna

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 Yes Warning Sheet Dew/AHC Caution Sheet Quick Set-up Sheet Circuit Diagram Service Facility List Important Safeguard

G-15 Interface Switch Power Yes

Indicator Power Red

Key Light up Rec/OTR

Terminals Front Video Input RCAx1

Rear Video Input RCAx1

G-16 Set Size Approx. W x D x H (mm) 574 x 483 x 514.5 G-17 Weight Net (Approx.) 26.5 kg( 58.5 lbs)

G-18 Carton Master Carton

Gift Box Yes

Drop Test Natural Dropping At

Container Stuffing(40' container) 171

w/Guarantee Card Yes

UM size x pcs UM-4 x 2 pcs

Poles Terminal -

Terminal -

Play Yes Pause/Still System Select 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 Red T-Rec Red On Timer CS

One Touch Playback Play

Audio Input RCA x 2(Stereo) Other Terminal Head Phone(Stereo & Mono, 3.5mm)

Audio Input RCA x 2(Stereo) Video Output RCAx1 Audio Output RCA x 2(Stereo) Euro Scart Diversity Ext Speaker DC Jack 12V(Center +) VHF/UHF Antenna Input AC Inlet

Gross (Approx.) 28.5 kg( 62.9 lbs)

Content Material Dimensions W x D x H(mm) Description of Origin -

Material DOUBLE/WHITE Dimensions W x D x H(mm) 647 x 627 x 625 Design As per Buyer's Description of Origin Yes

Height (cm) 31

F Type

1 Corner / 3 Edges / 6 Surfaces

No No

No No No No No No

No No No

No No No No No

No No No No

Sets

GENERAL SPECIFICATIONS

G-19 Cabinet Material Cabinet Front PS 94V0 DECABROM

Cabinet Rear PS 94V0 DECABROM Jack Panel PS 94V0

DISASSEMBLY INSTRUCTIONS

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

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

Remove the 6 screws 1.

Remove the 2 screws 2 which are used for holding the Back Cabinet.

Remove the AC cord from the AC cord hook 3.

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 connectors: (CP801, CP802 and CP805).

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: (CP401, CP502, CP4201 and CP4202).

Unlock the support 2.

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

Front Cabinet

TV/VCR Block

UP TO RELEASE

1-4: MAIN PCB (Refer to Fig. 1-4)

Remove the screw 1.

Remove the Main PCB Holder.

Remove the 2 screws 2.

Remove the 3 screws 3.

Disconnect the following connectors: (CP810A, CP820A and CP402).

Remove the Main PCB in the direction of arrow.

Main PCB

Main PCB Holder

Fig. 1-3

Front Cabinet

CRT PCB

VCR Block

Fig. 1-4

Fig. 1-2

DISASSEMBLY INSTRUCTIONS

1-5: DECK SHIELD PLATE (Refer to Fig. 1-5)

Remove the 2 screws 1.

Remove the screw 2.

Remove the Deck Shield Plate in the direction of arrow.

Deck Shield Plate

VCR Block

1-6: DECK CHASSIS (Refer to Fig. 1-6)

Remove the 3 screws 1.

Disconnect the following connectors: (CP1004, CP1005, CP1006, CP4001, CP4002 and CP4003).

Remove the Deck Chassis in the direction of arrow.

Fig. 1-5

1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7)

Remove the screw 1.

Remove the Syscon PCB in the direction of arrow (A).

Remove the 2 screws 2.

Unlock the 2 supports 3.

Remove the Jack Plate in the direction of arrow (B).

Jack Plate

Syscon PCB

(A)

Deck Holder

(B)

Fig. 1-7

Syscon PCB

Deck Chassis

Fig. 1-6

DISASSEMBLY INSTRUCTIONS

2. REMOVAL OF DECK PARTS

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

Remove the 2 screws 1.

Slide the 2 supports 2 and remove the Top Bracket.

NOTE

When you install the Top Bracket, install the screw (1) first, then install the screw (2).

(2)

Top Bracket

Main Chassis

• Screw Torque: 5 ± 0.5kgf•cm

Top Bracket

Main Chassis

2-2: FLAP LEVER/TAPE GUIDE R (Refer to Fig. 2-2)

Move the Cassette Holder Ass'y to the back side.

Remove the Polyslider Washer 1.

Remove the Flap Lever.

Unlock the 3 supports 2 and remove the Tape Guide R.

(1)

Fig. 2-1

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)

Tape Guide L

REC Lever

• 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 so that

1. the Link Ass'y doesn't slip out. Push the Locker R to remove the Cassette Side R.

2. Remove the Cassette Side L.

Main Chassis

Cassette Side R

Locker R

Tape Guide R

Flap Lever

Main Chassis

Fig. 2-2

2-3: TAPE GUIDE L (Refer to Fig. 2-3-A)

Move the Cassette Holder Ass'y to the back side.

1. Unlock the 2 supports 1 and remove the Tape Guide L.

2. Remove the REC Lever. (Recorder only)

REC Lever

Tape Guide L

• The REC Lever is not installed on the Video Cassette Player.

Main Chassis

Fig. 2-3-A

Cassette Side L

Main Chassis

Fig. 2-4

2-5: CASSETTE SIDE L/R (Refer to Fig. 2-5)

Unlock the 4 supports 1 and then remove the Cassette

1. Side L/R. Remove the Cassette Earth Spring.

NOTE

1.2.When you install the Cassette Side R, be sure to move the Locker R after installing. After the installation of the Cassette Holder, then install the Cassette Earth Spring.

Cassette Side R

Cassette Earth Spring

Cassette Holder

Locker R

Cassette Side L

Fig. 2-5

DISASSEMBLY INSTRUCTIONS

2-6: LINK UNIT (Refer to Fig. 2-6)

Set the Link Unit to the Eject position.

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

2. the (B) side.

Link Unit

(B)

(A)

Main Chassis

Link Unit

Main Chassis

2-7: LOADING MOTOR ASS'Y (Refer to Fig. 2-7)

Remove the Link Lever.

1. Remove the screw 1.

2. Remove the Loading Motor Ass'y.

3. Unlock the 2 supports 2 and remove the Deck PCB

4. (BOT).

Fig. 2-6

2-9: TENSION ASS'Y (Refer to Fig. 2-9-B)

Turn the Middle Gear clockwise so that the Tension

1. Holder hook, is set to the position of Fig. 2-9-A to more the Tension Arm Ass'y. Remove the Tension Spring.

2. Unlock the support 1 and remove the Tension Arm

3. Ass'y. Remove the Tension Adjust.

4. Unlock the 2 supports 2 and remove the Tension Band

5. Ass'y. Float the hook 3 and turn it clockwise then remove the

6. Tension Holder. Remove the SS Brake Spring.

7. Remove the SS Arm Brake.

Tension Arm Ass'y

Fig. 2-9-A

Tension Adjust

Tension Band Ass'y

Loading Motor Ass'y

Main Chassis

Deck PCB (BOT)

• Screw Torque: 5 ± 0.5kgf•cm

2-8: SENSOR COVER L3 (Refer to Fig. 2-8)

Unlock the support 1 and remove the Sensor Cover L3.1.

Main Chassis

Sensor Cover L3

Link Lever

Fig. 2-7

Tension Spring

SS Brake Spring

SS Arm Brake

Tension Holder

Tension Arm Ass'y

Inclined S Ass'y

Fig. 2-9-B

NOTE

When you install the Tension Adjust, install as shown in Fig. 2-9-C. (Refer to Fig. 2-9-C)

Adjust the direction of the Marker to inside.

Fig. 2-9-C

Fig. 2-8

DISASSEMBLY INSTRUCTIONS

2-10: T BRAKE ASS'Y (Refer to Fig. 2-10)

1.2.Remove the T Brake Spring. Turn the T Brake Ass'y clockwise and bend the hook section to remove it.

T Brake Ass'y

Hook section

T Brake Spring

Fig. 2-10

2-11: S REEL/T REEL (Refer to Fig. 2-11)

Remove the S Reel and T Reel.

1. Remove the 2 Polyslider Washers 1.

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. 2-11) Do not adhere the stains on it. When you install the reel, clean the shaft and oil it. (If

5. 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)

S Reel

(A)

T Reel

(A)

P5 Spring

P5-3 Arm Ass'y

• Screw Torque: 5 ± 0.5kgf•cm

Cassette Opener

Pinch Roller Block

Pinch Roller Arm Spring

Pinch Roller Lever Ass'y

Main Chassis

Fig. 2-12-A

NOTE

Do not touch the Pinch Roller. (Use gloves.)

1. When you install the Pinch Roller Block, install as shown

2. in the circle of Fig. 2-12-B. (Refer to Fig. 2-12-B)

Fig. 2-12-B

2-13: A/C HEAD (Refer to Fig. 2-13-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.

NOTE

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

1. When you install the A/C Head Spring, install as shown

2. in Fig. 2-13-B. (Refer to Fig. 2-13-B) When you install the A/C Head, tighten the screw (1)

3. first, then tighten the screw (2), finally tighten the screw (3).

2-12: PINCH ROLLER BLOCK/P5-3 ARM ASS'Y

(Refer to Fig. 2-12-A)

Remove the P5 Spring.

1. Remove the screw 1.

2. Unlock the 2 supports 2 and remove the Cassette

3. Opener. Remove the Pinch Roller Block, Pinch Roller Arm

4. Spring, Pinch Roller Lever Ass'y and P5-3 Arm Ass'y.

Fig. 2-11

(3)

(1)

(2)

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

A/C Head

A/C Head Spring

A/C Head Base

Fig. 2-13-A

DISASSEMBLY INSTRUCTIONS

2-16: CAPSTAN DD UNIT (Refer to Fig. 2-16)

Remove the Capstan Belt.

1. Remove the 3 screws 1.

2. Remove the Capstan DD Unit.

Spring Position

Fig. 2-13-B

2-14: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-14)

Remove the screw 1.

1. Remove the FE Head.

FE Head

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

• Screw Torque: 4 ± 0.5kgf•cm

Fig. 2-14

2-15: AHC ASS'Y/CYLINDER UNIT ASS'Y

(Refer to Fig. 2-15)

Unlock the support 1 and remove the AHC Ass'y.

1. Remove the 3 screws 2.

2. Remove the Cylinder Unit Ass'y.

NOTE

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.

AHC Ass'y

Capstan Belt

Capstan DD Unit

• Screw Torque: 5 ± 0.5kgf•cm

Fig. 2-16

2-17: MIDDLE GEAR/MAIN CAM (Refer to Fig. 2-17-A)

Remove the Polyslider Washer 1, then remove the

1. Middle Gear. Remove the E-Ring, then remove the Main Cam, P5

2. Cam, Pinch Roller Cam and Joint Gear.

Middle Gear

E-Ring

Main Cam

Pinch Roller Cam

Joint Gear

P5 Cam

Cylinder Unit Ass'y

(2)

• Screw Torque: 3 ± 0.5kgf•cm

Fig. 2-17-A

NOTE

When you install the Pinch Roller Cam, P5 Cam and Main Cam, align each marker. (Refer to Fig. 2-17-B)

Pinch Roller Cam

(1)

(3)

Check the hole of Main Chassis can be seen.

P5 Cam

Fig. 2-15

Main Cam

Marker

Fig. 2-17-B

DISASSEMBLY INSTRUCTIONS

2-18: CLUTCH ASS'Y (Refer to Fig. 2-18)

Remove the Capstan Brake Spring.

1. Remove the Polyslider Washer 1.

2. Remove the Clutch Ass'y, Ring Spring and Coupling

3. Gear. Unlock the 2 supports 2 and remove the Clutch Lever.

Clutch Ass'y

Capstan Brake Spring

Ring Spring

Coupling Gear

Clutch Lever

Fig. 2-18

2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A)

Remove the E-Ring 1 and remove the Main Loading

1. Gear. Slide the Main Rod and remove the Spring Holder.

2. Remove the Main Rod, Tension Lever, Clutch Actuator,

3. Idler Arm Ass'y. Remove the screw 2.

4. Remove the LED Reflecter.

5. Remove the Loading Arm S Ass'y and Loading Arm T

6. Ass'y. Remove the Loading Gear S and Loading Gear T.

7. Remove the Loading Gear Spring.

Spring Holder

Main Loading Gear

Tension Lever

Loading Gear T

Loading Gear Spring

Loading Arm T Ass'y

Loading Gear S

Loading Gear Spring

Idler Arm Ass'y

LED Reflecter

Clutch Actuator

Main Rod

NOTES

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. 2-19-B)

Marker

Main Loading Gear

Marker

Loading Arm T Ass'y

Loading Arm S Ass'y

Fig. 2-19-B

2. When you install the Clutch Actuator, install as shown in the circle of Fig. 2-19-C. (Refer to Fig. 2-19-C)

Clutch Actuator

Fig. 2-19-C

2-20: INCLINED S/T ASS'Y (Refer to Fig. 2-20)

Remove the Cap P4.

1. Remove the screw 1.

2. Unlock the support 2 and remove the Loading Gear

3. Holder. Remove the Inclined S Unit.

4. Remove the Inclined T Unit.

NOTE

Do not touch the roller of Guide Roller.

Inclined S Unit

Loading Gear Holder

Inclined T Unit

• Screw Torque: 5 ± 0.5kgf•cm

Loading Arm S Ass'y

Fig. 2-19-A

• Screw Torque: 2.5 ± 0.5kgf•cm

Cap P4

Fig. 2-20

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

2. the 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.

Fig. 3-5

DISASSEMBLY INSTRUCTIONS

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. 4-1.) 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. 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

Masking Tape (Cotton Tape)

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.

Blower type IC desoldering machine

Fig. 4-1

Tweezers

Peel off the Masking Tape.4. Absorb the solder left on the pattern using the Braided

5. 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

DISASSEMBLY INSTRUCTIONS

INSTALLATION

Take care of the polarity of new IC and then install the

1. 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

Supply the solder from the upper position of IC leads

Solder temporarily

sliding to the lower position of the IC leads. (Refer to Fig. 4-6.)

Fig. 4-5

When bridge-soldering between terminals and/or the

4. soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 4-8.)

Thin-tip Soldering Iron

Fig. 4-8

Finally, confirm the soldering status on four sides of the

5. IC using a magnifying glass. Confirm that no abnormality is found on the soldering position and installation position of the parts around the IC. If some abnormality is found, correct by resoldering.

NOTE

When the IC leads are bent during soldering and/or repairing, do not repair the bending of leads. If the bending of leads are repaired, the pattern may be damaged. So, be always sure to replace the IC in this case.

Soldering IronSolder

Absorb the solder left on the lead using the Braided

Supply soldering from upper position to lower position

Shield Wire. (Refer to Fig. 4-7.)

NOTE

Do not absorb the solder to excess.

Soldering Iron

Braided Shield Wire

Fig. 4-6

Fig. 4-7

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

KEY TO ABBREVIATIONS

Audio/Control

Automatic Color Control

Audio Erase

Automatic Frequency Control

Automatic Fine Tuning

Automatic Fine Tuning Detect

Automatic Gain Control

Amplifier

Antenna

Audio Playback

Automatic Phase Control

Assembly

All Time

Automatic

Audio/Video

Burst Gate Pulse

Beginning of Tape

Bandpass Filter

Brake Solenoid

Buffer

Black and White

Capacitance, Collector

Cassette

Capstan

Carrier

Channel

Clock

Clock (Syscon to Servo)

Combination, Comb Filter

Converter

Capstan Motor

Control

Cylinder

Cylinder-Motor

Cylinder-Sensor

Data (Syscon to Servo)

Decibel

Direct Current

Direct Drive Motor Unit

Demodulator

Detector

Deviation

Emitter

Emitter Follower

Emphasis

Encoder

Envelope

End of Tape

Equalizer

External

Fuse

Feed Back Clamp

Full Erase

Fast Forward, Flipflop

Frequency Generator

Front Loading Switch

Frequency Modulation

Frequency Sub Carrier

Forward

Generator

Ground

High Pass Filter

H.SW Hz

IC 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

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

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

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 Key Remocon Key Operations

VOL. (-) MIN

VOL. (-) MIN 1

VOL. (-) MIN

VOL. (-) MIN 4

VOL. (-) MIN

Releasing of V-CHIP PASSWORD.

Initialization of the factory. NOTE: Do not use this for the normal servicing.

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

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 "NOTE FOR THE REPLACING OF MEMORY IC".

VOL. (-) MIN 8

VOL. (-) MIN 9

Method Operations

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.

Writing of EEPROM initial data. NOTE: Do not use this for the normal servicing.

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

Adjusting of the Tracking to the center position. Refer to the "MECHANICAL ADJUSTMENT" (GUIDE ROLLER) and "ELECTRICAL ADJUSTMENT" (PG SHIFTER).

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.

Time

Parts Name

Audio Control Head

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 : Replace

500

hours

1,000 hours

1,500 hours

2,000 hours

3,000 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 USING HOURS

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: 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.

While holding down VOLUME button on front cabinet, press key 6 on remote control simultaneously.

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

INIT 00 83 POWER ON

PLAY/REC

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

0010 0003

Initial setting content of MEMORY IC.

POWER ON total hours. PLAY/REC total hours.

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.)

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.

Head

Audio Control Head

Cylinder Head

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