AIWA VX-T147 Service manual

VX-T147

SERVICE MANUAL

INTEGRATED COLOR TV/VIDEO

CASSETTE RECORDER

GENERAL

POWER REQUIREMENTS.................

POWER CONSUMPTION...................

WEIGHT ..............................................

DIMENSIONS ......................................

TV SECTION

PICTURE TUBE ..................................

TUNER SYSTEM ................................

CHANNEL COVERAGE......................

TV SYSTEM ........................................

HORIZONTAL RESOLUTION ............

VCR SECTION

OPERATING TEMPERATURE...........

VIDEO RECORDING SYSTEM ..........

VIDEO HEAD ......................................

230V AC, 50Hz 57W

13.5 kg (29.7 lbs.) 435 mm (W) x 365 mm (D) x

384.5 mm (H) (17 1/8 x 14 3/8 x 15 1/4 in.)

14" (34 cm "V"), 90 degree deflection Voltage synthesized tuner UHF: 21 to 69 I 240 lines

5°C to 40°C Rotary 2 head helical scanning system Azimuth 2 head

SPECIFICATIONS

BASIC TAPE MECHANISM : OVD-5

VIDEO SIGNAL SYSTEM ................

AUDIO TRACK .................................

USABLE CASSETTES.....................

TAPE SPEED ...................................

RECORDING TIME ..........................

VIDEO INPUT...................................

VIDEO OUTPUT ..............................

VIDEO S/N .......................................

AUDIO INPUT ..................................

AUDIO OUTPUT ..............................

PAL colour system, 625 lines, 50 fields 1 track (Mono) VHS video cassette PAL SP: 23.39 mm/sec LP: 11.69 mm/sec NTSC (Playback SP only)

33.35 mm/sec PAL SP: 4 hours 20 minutes with E-260 tape LP: 8 hours 40 minutes with E-260 tape NTSC (Playback SP only) 3 hours with T-180 tape

1.0Vp-p, 75 ohm, unbalanced

1.0Vp-p, 75 ohm, unbalanced 53dB (nominal) –8dBs, 50k ohm –6dBs, less than 1K ohm

Design and specifications are subject to change without

•

notice.

S/M Code No. 09-995-325-2O1

DATA

TABLE OF CONTENTS

SPECIFICATIONS.............................................................................................................................................................

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

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

VCR TEST TAPE INTERCHANGEABILITY TABLE ..........................................................................................................

DISASSEMBLY INSTRUCTIONS

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

REMOVAL OF DECK PARTS ...........................................................................................................................................

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

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

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

NOTE FOR THE REPLACING OF MEMORY IC ...............................................................................................................

DECK PARTS LOCATIONS..............................................................................................................................................

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

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

ADJUSTMENTS

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

MAJOR COMPONENTS LOCATION GUIDE (VCR)......................................................................................................

ELECTRICAL ADJUSTMENTS (VCR) ..........................................................................................................................

MAJOR COMPONENTS LOCATION GUIDE (TV).........................................................................................................

ELECTRICAL ADJUSTMENTS (TV) .............................................................................................................................

TROUBLESHOOTING GUIDES........................................................................................................................................

IC DESCRIPTIONS ...........................................................................................................................................................

SERVO TIMING CHART ...................................................................................................................................................

SYSTEM SWITCH MODE.................................................................................................................................................

SEMICONDUCTOR BASE CONNECTIONS .....................................................................................................................

BLOCK DIAGRAMS

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

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

SYSTEM CONTROL/OPERATION /POWER/IN/OUT....................................................................................................

TUNER/AUDIO/IF/T'TEXT .............................................................................................................................................

PRINTED CIRCUIT BOARDS (HEAD AMP/IF) .................................................................................................................

HEAD AMP SCHEMATIC DIAGRAM................................................................................................................................

IF SCHEMATIC DIAGRAM ...............................................................................................................................................

PRINTED CIRCUIT BOARDS (SYSCON) .........................................................................................................................

Y/C SCHEMATIC DIAGRAM.............................................................................................................................................

SYSTEM CONTROL SCHEMATIC DIAGRAM ..................................................................................................................

TUNER/AUDIO SCHEMATIC DIAGRAM..........................................................................................................................

POWER/IN/OUT SCHEMATIC DIAGRAM.........................................................................................................................

MICON SCHEMATIC DIAGRAM.......................................................................................................................................

CHROMA SCHEMATIC DIAGRAM ..................................................................................................................................

SOUND AMP SCHEMATIC DIAGRAM.............................................................................................................................

OPERATION 1 SCHEMATIC DIAGRAM ..........................................................................................................................

PRINTED CIRCUIT BOARDS (OPERATION/T'TEXT) ......................................................................................................

OPERATION 2 SCHEMATIC DIAGRAM ..........................................................................................................................

T'TEXT SCHEMATIC DIAGRAM ......................................................................................................................................

PRINTED CIRCUIT BOARDS (MAIN/CRT/POWER SW) .................................................................................................

DEFLECTION SCHEMATIC DIAGRAM............................................................................................................................

POWER SCHEMATIC DIAGRAM .....................................................................................................................................

CRT SCHEMATIC DIAGRAM ...........................................................................................................................................

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

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

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

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

ACCESSORY REPLACEMENT PARTS LIST ...................................................................................................................

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

FRONT LOADING UNIT 15 EXPLODED VIEW ................................................................................................................

CHASSIS/FRONT LOADING UNIT 15 REPLACEMENT PARTS LIST.............................................................................

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

COVER A-1 A-2 A-3

B1-1, B1-2 B2-1~B2-5 B3-1 C1-1, C1-2 C2-1 C3-1 C4-1, C4-2 C5-1 C5-2

D1-1~D1-3 D2-1 D2-2, D2-3 D3-1 D3-2~D3-5 E-1~E-27 F-1~F-5 G-1 G-2 H-1

I-1 I-2 I-3 I-4 J-1~J-3 J-4 J-5 J-6~J-8 J-9 J-10 J-11 J-12 J-13 J-14 J-15 J-16 J-17~J-19 J-20 J-21 J-22 J-23 J-24 J-25 J-26 K-1~K-3 L1-1~L1-2 L2-1 L2-1 M1-1, M1-2 M1-3 M2-1 N-1~N-5

A-1

SERVICING NOTICES ON CHECKING

1. KEEP THE NOTICES

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 cathode-ray 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-RAY

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 cathode-ray 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 aredeteriorated 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

A-2

VCR TEST TAPE INTERCHANGEABILITY TABLE

There are two types of the new alignment tape CH-1B (for NTSC) and CH-2 (for PAL). On each tape four signals (1) - (4) are recorded for the times and in the order shown below.

(1) : 8min. ---> (2) : 2min. ---> (3) : 5min. ---> (4) : 5min.

The TTV-MP1 (for M-PAL), TTV-MS1 (for MESECAM) and TTV-S1 (for SECAM) alignment tapes have the same contents as the previous tapes.

Method

NTSC

Now in use TYPE

TTV-N1

TTV-N1E

TTV-N2

TTV-N12

(SCV-1998)

TTV-N7A

New TYPE

Contents*1Model Model Contents*1

NTSC, Color, 1kHz, SP

NTSC, Color, 1kHz, EP

NTSC, Stairsteps, 7kHz, SP

NTSC, Color, 1kHz, SP

NTSC, Stairsteps, 1kHz, SP, HiFi 400Hz

CH-1B(2)

CH-1B(4)

CH-1B(1)

CH-1B(4)

CH-1B(3)

NTSC, Stairsteps, 1kHz, SP

NTSC, Color,

1kHz, EP

NTSC, Stairsteps, 7kHz, SP

NTSC, Color, No sound SP, HiFi 400Hz

NTSC, Color, 1kHz, EP

Application

PB-Y Level/General electrical ADJ. Head ACE Height/Tilt ADJ.

Switching position ADJ.

Head ACE Azimuth ADJ.

FM envelope ADJ. X-Value ADJ.

HiFi Audio PB Level ADJ.

TTV-P1

TTV-P1L

PAL

TTV-P2

TTV-P7

TTV-P16

*1. Described in the order of color format. Video signal. Linear audio. Tape speed and Hi-Fi audio. *2. Use CH-1B (1) - (3) with models used exclusively in the SP mode. *3. Use CH-2 (3) and (4) when it is necessary to observe the chroma signal.

PAL, Color, 1kHz, SP

PAL, Color, 1kHz, LP

PAL, Stairsteps, 6kHz, SP

PAL, Stairsteps, 1kHZ, SP, HiFi, 1kHz

PAL, Color, 400Hz, SP, HiFi 1kHz

CH-2(2)

CH-2(4)

CH-2(1)

CH-2(3)

PAL, Stairsteps, 1kHz, SP

PAL, Color, 1kHz, LP

PAL, Stairsteps, 6kHz, SP

PAL, Color, No sound SP, HiFi 400Hz

No Changed.

Switching position ADJ. PB-Y Level/General electrical ADJ. Head ACE Height/Tilt ADJ.

Switching position. (LP Model) FM Envelope ADJ. (LP Model) X-Value ADJ. (LP Model)

Head ACE Azimuth ADJ. FM Envelope ADJ. (SP Model) X-Value ADJ. (SP Model)

HiFi Audio PB Level ADJ.

FM Filter ADJ.

A-3

DISASSEMBLY INSTRUCTIONS

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

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

Remove the 2 screws 1 and 2 screws 2.

Remove the 2 screws 3 which are used for holding the Back Cabinet.

Remove the AC cord from the AC cord hook 4.

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 on PAGE 12)

Disconnect the following connectors: (CP801 and CP850).

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: (CY757, CP353, CP503, CP502 and CP301).

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: (CP810 and CP820).

Remove the Main PCB in the direction of arrow.

Main PCB

Main PCB Holder

Fig. 1-3

Front Cabinet

CRT PCB

Fig. 1-2

B1-1

VCR Block

Fig. 1-4

DECK SHIELD PLATE AND BOTTOM SHIELD

1-5:

PLATE (Refer to Fig. 1-5)

Remove the 4 screws 1.

Remove the screw 2.

Remove the Bottom Shield Plate in the direction of arrow (A).

Remove the screw 3.

Remove the 4 screws 4.

Remove the Deck Shield Plate in the direction of arrow (B).

DISASSEMBLY INSTRUCTIONS

Deck Shield Plate

VCR Block

Fig. 1-5

Bottom Shield Plate

(B)

(A)

1-6:FRONT LOADING UNIT 15 AND DECK CHASSIS

(Refer to Fig. 1-6-A)

Remove the 2 screws 1.

Remove the Front Loading Unit 15 in the direction of arrow (A).

Remove the 3 screws 2.

Remove the 2 screws 3.

Disconnect the following connectors: (CP4001, CP1002 and CP4002).

Remove the Deck Chassis in the direction of arrow (B).

NOTE

When installing the Front Loading Unit 15, align the timing marker and pull the Cassette Holder Ass'y in the direction of arrow (C). (Refer to Fig. 1-6-B)

Deck Chassis

(C)

Cassette Holder Ass'y

Marker

Fig. 1-6-B

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

Remove the screw 1.

Unlock the support 2.

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

Remove the 2 screws 3.

Unlock the 2 supports 4.

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

Jack Plate

Syscon PCB

(B)

(A)

Deck Chassis

Syscon PCB

Front Loading Unit 15

(B)

(A)

Deck Holder

Fig. 1-7

Fig. 1-6-A

B1-2

DISASSEMBLY INSTRUCTIONS

REMOVAL OF DECK PARTS

2-1: LINK GEAR (R) / CAM GEAR (Refer to Fig. 2-1)

Unlock the support 1.

Remove the BOT Sensor Cover and BOT Reflector.

Unlock the 3 supports 2.

Remove the Side Bracket R2 and Spring Earth.

Remove the Flap Lever, Link Gear (R) , Cam Gear Ass'y and BOT Lever.

NOTE

When installing the BOT Lever, insert the BOSS into

1. the hole of Linl Gear (R). When installing the Link Ass'y 3 and Link Gear (R),

2. align the timing Marks.

Side Bracket L

Tape Piece Guide

Bracket R Spring

Joint Gear

Lever Rec Spring

Cassette Holder Ass'y

Top Bracket

Side Bracket R1

Fig. 2-2

Spring Earth

Side Bracket R1

Link Ass'y 3

Marker

Link Gear (R)

Flap Lever

Link Gear (R)

Marker

BOT Reflector

BOT Lever

Cam Gear Ass'y

Marker

BOT Sensor Cover

Side Bracket R2

Joint Gear

2-2:TOP BRACKET / TAPE PIECE GUIDE

(Refer to Fig. 2-2)

1. Remove the Lever Rec Spring.

2. Unlock the 2 supports 1.

3. Remove the Tape Piece Guide.

4. Unlock the 4 supports 2.

5. Remove the Top Bracket.

6. Remove the Side Bracket R1 and Side Bracket L.

7. Unlock the support 3.

8. Remove the Joint Gear.

9. Remove the Bracket R Spring.

Fig. 2-1

2-3: LINK ASS'Y 3 (Refer to Fig. 2-3)

1. After removing in the direction (A) of Link Ass'y 3, remove the Link Ass'y 3 in the direction (B).

NOTE

Install the (B) first, then install the (A).

Cassette Holder Ass'y

(A)

(B)

Link Ass'y 3

2-4: CASSETTE SIDE R (Refer to Fig. 2-4)

1. Unlock the 2 supports 1.

2. Remove the Cassette Side R.

3. Remove the Pack Spring.

4. Remove the Locker Spring.

5. Unlock support 2.

6. Remove the Locker R.

Cassette Side L

Cassette Side R

Pack Spring

Fig. 2-3

B2-1

Locker R

Locker Spring

Cassette Holder Ass'y

Fig. 2-4

DISASSEMBLY INSTRUCTIONS

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

1. Unlock the 2 supports 1.

2. Remove the Cassette Side L.

3. Remove the Pack Spring.

4. Remove the Locker Spring.

5. Unlock the support 2.

6. Remove the Locker L.

Locker Spring

Locker L

Pack Spring

Cassette Side L

Cassette Holder Ass'y

2-6: BRAKE BRACKET (Refer to Fig. 2-6)

Remove the Main Brake Spring, S-S Brake Spring, Joint Arm Spring and T-S Brake Spring.

Remove the 2 screws 1.

Remove the screw 2.

Remove the Brake Bracket.

Remove the Sub Brake S, Sub Brake T , Main Brake S Ass'y and Main Brake T Ass'y.

Remove the Joint Arm.

Remove the Reflector LED 2.

Brake Bracket

Main Brake S Ass'y S-S Brake Spring

Sub Brake S

Reflector LED 2

Main Brake Spring

Main Brake T Ass'y

Joint Arm

Joint Arm Spring

T-S Brake Spring

Fig. 2-5

2-7: TENSION BAND (Refer to Fig. 2-7)

1. Remove the Tension Arm Spring 1.

2. Remove the Tension Arm Spring 2.

3. Remove the Tension Adjust.

4. Remove the Tension Arm Ass'y.

5. Remove the Tension Band Ass'y.

6. Remove the Tension Lever 2 Ass'y.

Tension Adjust

Tension Arm Spring 2

Tension Arm Spring 1

Tension Band Ass'y

Tension Arm Ass'y

(A)

Tension Lever 2 Ass'y

Fig. 2-7

NOTES

1.2.Install the Tension Band Ass'y without twisting it. Turbine Oil the area marked with A in Fig. 2-7.

2-8: REEL DISK (Refer to Fig. 2-8)

1. Remove the Reel Disk S and Reel Disk T.

2. Remove the 2 polyslider washers.

NOTES

Installation of Reel Disk after performing step 1, 2 and 3 in section 2-7 of DISASSEMBLY INSTRUCTIONS.

The Height Adjustment washers are sometimes attached to the back of the Reel Disk.

Clean the Reel Disk Shaft and put in height adjusting washers.

Be careful not to damage the Tension Band Ass'y at the time of removal and installation.

Be careful not to scratch the Reel Disk Shaft with the polyslider washer or the tool at the time of removal and installation.

After oiling the Reel Disk Shaft, install the new Reel Disk S and Reel Disk T again.

After installation, adjust the height of the Reel Disk.

(Refer to item 1-1 of MECHANICAL ADJUSTMENTS)

After installation, adjust and confirm the tension post position.

(Refer to item 1-2 of MECHANICAL ADJUSTMENTS)

Sub Brake T

Fig. 2-6

B2-2

DISASSEMBLY INSTRUCTIONS

Reel Disk S

Polyslider Washer

Reel Disk T

Polyslider Washer

(A)

PINCH ROLLER / CASSETTE OPENER

2-9:

(Refer to Fig. 2-9)

Unlock the support 1.

1. Remove the Pinch Roller.

2. Remove the screw 2.

3. Unlock the 2 supports 3.

4. Remove the Cassette Opener.

5. Remove the Spring P5 and Arm P5 Ass'y.

6. Remove the Cam Gear, Polyslider Washer 4, Spring

7. Cam Pinch and Cam Pinch Roller. Remove the Polyslider Washer 5 and Cam P5.

NOTES

1.2.Do not touch the Pinch Roller. (Use gloves.) When installing the Cam P5, Cam Pinch Roller and Cam Gear, align the timing marks.

Fig. 2-8

Pinch Roller

Spring P5

Polyslider Washer 5

Cam P5

Arm P5 Ass'y

Cam P5

Cassette Opener

Cam Gear

Cam Pinch Roller

Spring Cam Pinch Polyslider Washer 4

Cam Pinch Roller

Cam Gear

Marker

Fig. 2-9

2-10: AUDIO CONTROL HEAD (Refer to Fig. 2-10)

Disconnect the following connector: (CP4106) on the Head Amp PCB.

Remove the 3 screws 1.

Remove the 3 Audio Control Head Springs.

Remove the Audio Control Head.

NOTES

1.2.Do not touch the head by any means when replacing the Audio Control Head. (Use gloves.) After replacement, confirm the following adjustments. a. MECHANICAL ADJUSTMENTS: ITEM 2-2 b. MECHANICAL ADJUSTMENTS: ITEM 2-3

B2-3

Audio Control Head Spring

DISASSEMBLY INSTRUCTIONS

Audio Control Head

Audio Control Head Spring

Mode Switch

Tension Lever Spring

Capstan Belt

Plate Bottom

Audio Control Head Base

Fig. 2-10

2-11: CYLINDER UNIT (Refer to Fig. 2-11)

Disconnect the following connectors: (CP4101 and CP4102) on the Head Amp PCB.

Remove the Joint Screw, then remove the Azimuth Spring.

Remove the 2 screws 1, then remove the Polyslider Washer and Cylinder Unit from the Main Chassis.

Cylinder Unit

Polyslider Washer

Main Chassis

Azimuth Spring

Joint Screw

Fig. 2-11

2-12: PLATE BOTTOM (Refer to Fig. 2-12)

1. Remove the Capstan Belt.

2. Remove the 2 screws 1.

3. Remove the 3 screws 2.

4. Remove the Mode Switch.

5. Remove the Tension Lever Spring.

6. Remove the Plate Bottom.

NOTE

When installing the Mode Switch, align the timing position.

Deck Chassis

Marker

Position

Fig. 2-12

2-13: CENTER PULLEY (Refer to Fig. 2-13)

1. Remove the Polyslider Washer 1.

2. Remove the Center Pulley.

3. Remove the Polyslider Washer 2.

4. Remove the Center Pulley Spring.

5. Remove the Idler Arm Ass'y.

6. Remove the 2 Polyslider Washers 3.

7. Remove the Clutch Gear T Ass'y and Clutch Gear S Ass'y.

Polyslider Washer 1

Center Pulley

Polyslider Washer 2

Polyslider Washer 3

Clutch Gear S Ass'y

Center Pulley Spring

Idler Arm Ass'y

Polyslider Washer 3

Clutch Gear T Ass'y

B2-4

Fig. 2-13

DISASSEMBLY INSTRUCTIONS

2-14: MAIN CAM (Refer to Fig. 2-14)

Remove the Loading Lever.

Remove the Main Brake Lever.

Remove the Capstan Brake Spring.

Remove the Capstan Brake Ass'y.

Remove the Main Rod Spring.

Remove the Tension Holder.

Remove the Tension Lever.

Remove the Main Cam.

Remove the Middle Gear.

10.

Remove the Main Rod Ass'y.

NOTES

1.2.When installing the Main Rod Ass'y, install side (B) first, then install side (A). When installing the Loading Lever, align the timing marks.

Loading Lever

Main Brake Lever

Main Cam

Middle Gear

(B)

Capstan Brake Ass'y

Capstan Brake Spring

Tension Lever

Main Rod Spring

Tension Holder

Main Rod Ass'y

(A)

2-15: CAPSTAN DD UNIT (Refer to Fig. 2-15)

1. Remove the 3 screws 1.

2. Disconnect the CP4105.

3. Remove the Capstan DD Unit.

NOTE

Use the specified screw to hold the Capstan DD Unit.

Capstan DD Unit

Fig. 2-15

2-16: INCLINED T ASS'Y / INCLINED S ASS'Y

(Refer to Fig. 2-16)

Remove the 4 screws 1.

Remove the Catcher S and Catcher T.

Remove the 2 CS Rings.

Remove the Inclined T Ass'y and Inclined S Ass'y.

Remove the Loading Gear T Ass'y.

Remove the Loading Gear S Ass'y.

NOTE

When installing the Inclined T Ass'y and Inclined S Ass'y, align the timing marks.

Loading Lever

Marker

Loading Gear T

Marker

Middle Gear

Main Cam

Marker

Fig. 2-14

Inclined S Ass'y

Catcher S

Loading Arm S Ass'y

Loading Arm Spring

Loading Gear S

Loading Gear T

CS Ring

Loading Gear T

CS Ring

Marker

Inclined T Ass'y

Catcher T

Loading Arm Spring

Loading Arm T Ass'y

Loading Gear S

Fig. 2-16

B2-5

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.)

Location of Anode Cap

Fig. 3-3

NOTE

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

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.)

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

CRT

Support

CRT

Fig. 3-1

Fig. 3-2

Fig. 3-4

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

Support

CRT

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

Fig. 3-5

B3-1

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

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

Mech State Switch

Non Connection

Noise Reduction

Oscillator

Operation

Playback

Playback Control

Playback-Chrominance

Playback-Luminance

Printed Circuit Board

Power Control

Phase Detector

Pulse Generator

Peak-to Peak

Right

Recording

Recording-Chrominance

Recording-Luminance

Reel Brake

Reel Sensor

Reference

Regulated, Regulator

Rewind

Reverse

Radio Frequency

Remote Control

Relay

Serial Clock

Sensor Common

Serial Data

Segment

Select, Selector

Sensor

Search Mode

Serial Input

Sound Intermediate Frequency

Serial Output

Solenoid

Standard Play

Serial Strobe

Switch

C1-1

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

C1-2

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

Loading Motor Belt

Reel Belt

Pinch Roller

Capstan DD Unit

Loading Motor

Tension Band

Capstan Shaft

Tape Running Guide Post

Cylinder Unit

: Replace : Clean

500

hours

1,000 hours

CLEANING

NOTE

After cleaning the heads with isopropyl alcohol, do not run a tape until the heads dry completely. If the heads are not completely dry and alcohol gets on the tape, damage may occur.

1. AUDIO CONTROL HEAD

Wrap a piece of chamois around your finger. Dip it in isopropyl alcohol and clean the audio control head by wiping it horizontally. Clean the full erase head in the same manner. (Refer to the figure below)

1,500 hours

2,000 hours

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 up or down since this can damage the head. Always use a piece of chamois for cleaning.

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.

Audio Control Head

2. TAPE RUNNING SYSTEM

When cleaning the tape transport system, use the gauze moistened with isopropyl alcohol.

Cylinder Head

C2-1

NOTE FOR THE REPLACING OF MEMORY IC

If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1.

NOTE

••Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 30 minutes before Power On or alternatively, discharge backup capacitor. No need the setting for after INI 6.

INI

ADDRESS

DATA

Enter DATA SET mode by setting VOLUME to minimum.

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

ADDRESS and DATA should appear as FIG 1.

INI

EB 91 A9 00 88 AD

Table 1

INIT 01 EB

ADDRESS DATA

Fig. 1

ADDRESS is now selected and should "blink". Using the SET + or - keys on the remote, step through the ADDRESS until

required ADDRESS to be changed is reached. Press ENTER to select DATA. When DATA is selected, it will "blink".

Again, step through the DATA using SET + or - until required DATA value has been selected.

Pressing ENTER will take you back to ADDRESS for further selection if necessary.

Repeat steps 4 to 7 until all data has been checked.

When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.

The unit will now have the correct DATA for the new MEMORY IC.

INI04INI05INI

INI 03

C3-1

DECK PARTS LOCATIONS

(TOP VIEW)

Main Chassis

Tension Arm Ass'y

EOT Reflector

Guide Roller S Ass'y

P0 Post

P1 Post

FE Head

Cylinder Unit

Auto Head Cleaning

10.

Head Amp PCB

11.

Audio/Control Head

12.

Loading Motor

13.

Pinch Roller Block

14.

Cam Gear

15.

Cassette Opener

16.

Brake Bracket

17.

Reel T

18.

LED Reflector

19.

Guide Roller T Ass'y

20.

Reel S

21.

Tension Band Ass'y

C4-1

DECK PARTS LOCATIONS

(BOTTOM VIEW)

22.

Worm Bracket F Ass'y

23.

Mode Switch

24.

Worm Ass'y

25.

Worm Bracket R Ass'y

26.

Loading Motor Belt

27.

Capstan DD Unit

(FRONT LOADING UNIT 15)

Capstan Brake Ass'y

29.

Bottom Plate

30.

Clutch Gear S Ass'y

31.

Idler Arm Ass'y

32.

Center Pulley

33.

Clutch Gear T Ass'y

Side Bracket L

Top Bracket Ass'y

Side Bracket R Ass'y

Cam Gear Ass'y

Bot Sensor Cover

Side Bracket R2

Tape Piece Guide

Cassette Holder Ass'y

C4-2

SERVICING FIXTURES AND TOOLS

VHS Alignment Tape JG001C JG001D

JG022 Master Plane JG024 Reel Disk Height

JG162A Cable (8 pins) Part No. SJ-G16-2A0-000 JG162H Cable (15 pins) Part No. SJ-G16-2H0-000 JG162Y Cable (5 pins) Part No. SJ-G16-2Y0-000

(TTV-P2 or CH-2) (TTV-P1 or CH-2)

JG002B JG002F

JG002G

Tentelometer

Adapter Dial Torque Gauge (60~600gf•cm) (100~1200gf•cm)

Adjustment Jig

JG005 Post Adjustment Screwdriver Part No. SV-TG0-030-000 (small)

JG100A Torque Tape (VHT-063)

JG153 X Value Adjustment

Screwdriver

JG154 Cable Part No. SJ-G15-400-000

Part No.

JG001C JG001D JG002F

JG002G

JG005 JG153

JG022/JG024

JG100A

JG154 Used to connect the test point of SERVICE and GROUND

JG162A/JG162H Used to connect the SYSCON PCB and MAIN PCB

JG162Y Used to connect the SYSCON PCB and CRT PCB

Stair Step, 6KHz Color Bar, 1KHz Playback Take Up Torque Fast Forward Torque, Rewind Torque, Brake Torque (Take up Reel/Supply Reel)

Guide Roller Adjustment X-Value Adjustment Reel Disk Height Adjustment Playback Back Tension Torque

Remarks

C5-1

PREPARATION FOR SERVICING

Basic Servicing Position (In case of needing to check on all blocks)

Unplug the connector CP301, CP353 and CY757, then remove the TV/VCR Block from the set.

Unplug the connector CP810, CP820 and CP850, then remove the Main PCB from the VCR Block.

Connect as shown in the below figure using the Service Fixture.

• Connect the Syscon PCB to the Main PCB with the cable JG162A and JG162H.

• Connect the Syscon PCB to the CRT PCB with the cable JG162Y. Remove the Operation PCB from the set, then connect it with the Syscon PCB.

If necessary, connect CP353 (Earphone Input Terminal) Short circuit between TP1001 and Ground with the cable JG154.

(Refer to MAJOR COMPONENTS LOCATION GUIDE)

The EOT, BOT and Reel Sensor do not work at this moment. At that time, the STOP/EJECT button is available to insert and eject the Cassette Tape.

Head Amp PCB

JG162A

T'Text PCB

JG162H

To Main PCB (CD810)

To Main PCB (CD820)

To CRT PCB (CD850)

Servicing Position for Main PCB (In case of needing to check on Main PCB)

• It's possible to get the Servicing Position without the extension Jig if you arrange the unit as shown below. (But L503 connection can not be done, Degause circuit will not operate.)

JG162Y

To Ground

CP810

CP850

CP820

JG154

IF PCB

TP1001

CY757

Deck Chassis

CP353

Operation PCB

Syscon PCB

• Be careful for the short circuit.

Main PCB

L503 (2 Pin)

VHS Tape (Put the Tape under the FBT.)

C5-2

MECHANICAL ADJUSTMENTS

1. CONFIRMATION AND ADJUSTMENT

Read the following NOTED items before starting work.

•

Place an object which weighs between 350g and 500g on the Cassette Tape to keep it steady when you want to make the tape run without the Front Loading Unit 15. (Do not place an object which weighs over 500g. )

•

When you activate the deck without the Front Loading Unit 15, short circuit between TP1001 and Ground. In this condition the BOT/EOT/Reel Sensor will not function.

1-1: CONFIRMATION AND ADJUSTMENT OF

REEL DISK HEIGHT

Turn on the power and set to the STOP mode.

Set the master plane (JG022) and reel disk height

adjustment jig (JG024) on mechanism framework, taking care not to scratch the drum, as shown in Fig. 1-1-A. Confirm that the reel disk is lower than "A" of the reel disk

height adjustment jig (JG024) on the master plane and higher than "B" as shown in Fig. 1-1-B. If it is not, adjust to less than 7.5mm±0.2mm with the height adjustment washer. Perform the same adjustment for other reel.

Master Plane (JG022)

Reel Disk Height Adjustment Jig (JG024)

1-2: CONFIRMATION AND ADJUSTMENT OF

TENSION POST POSITION

1.2.Turn on the power and set to the PLAY mode adjust the Tension so that the Tension Post is at the position of

0.3mm~0.5mm from the Rib. (Refer to Fig. 1-2) Confirm that the video tape is not curling at the flange of P1 post or is not running on flanges.

P1 Post

Tension Arm

Tension Post

P0 Post

Rib

Tension Adjust

Reel Disk (S)

Fig. 1-2

1-3: CONFIRMATION AND ADJUSTMENT OF BACK

TENSION ON PLAYBACK

1.2.Load a video tape recorded in standard speed mode. Set the unit to the PLAY mode. Install the tentelometer as shown in Fig. 1-3. Confirm the value is within 20~27gf•cm at this time.

• IN CASE OF USING A CASSETTE TYPE TORQUE TAPE.

1.2.After adjustment, confirm and adjust the tension post position (Refer to item 1-2) for the tension arm, install the cassette type torque tape (JG100A) and set to the PLAY mode. Confirm that the left hand side tension value of the torque tape is 25~38gf•cm for the standard mode tape.

Master Plane (JG022)

7.5mm±0.2

Height Adjustment Washer

3.1x5.4xT0.13

3.1x5.4xT0.3

Reel Disk Height Adjustment Jig (JG024)Reel Disk

Fig. 1-1-A

Fig. 1-1-B

P1 Post

Tentelometer

Video Tape

Guide Roller

Fig. 1-3

D1-1

MECHANICAL ADJUSTMENTS

1-4: CONFIRMATION OF FAST FORWARD TORQUE

1.2.Set torque gauge (JG002G) on take-up reel disk, and place unit in FAST FORWARD mode. (Refer to Fig. 1-4) Confirm that torque is more than 400gf•cm.

NOTE

After setting the torque gauge on the reel disk, hold the gauge in place. Push the FAST FORWARD button and the reel disk will begin to turn.

1-5: CONFIRMATION OF REWIND TORQUE

Operate within 4 or 5 seconds after the reel disk begins to turn.

Set torque gauge (JG002G) on supply reel disk, and place the unit in REWIND mode. (Refer to Fig. 1-4).

Confirm that torque is more than 400gf•cm.

NOTE

After setting the torque gauge on the reel disk, hold the gauge in place. Push the REWIND button and the reel disk will begin to turn.

1-6: CONFIRMATION OF REEL BRAKE TORQUE

(Take-Up Reel Brake) (Refer to Fig. 1-4)

Set to STOP mode.

Set the torque gauge (JG002G) to the take-up reel and turn it counterclockwise.

Confirm that it is more than 200gf•cm at that time. (Supply Reel Brake) (Refer to Fig. 1-4)

Set to STOP mode.

Set the torque gauge (JG002G) to the supply reel and turn it clockwise.

Confirm that it is more than 200gf•cm at that time.

NOTE

Separate the idler from the reel and confirm the brake torque.

Torque Gauge

NOTE

If the torque value checked is out of tolerance, replace the appropriate parts as follows.

Check Items

Replace Parts 1-4 Idler Ass'y or Clutch ASS'Y 1-5

1-6

Idler Ass'y or Clutch ASS'Y Main Brake T Ass'y or Main Brake

S Ass'y

2. TAPE RUNNING CONFIRMATION AND ADJUSTMENT

••Tape running is adjusted precisely at the factory.

Normally, it is not necessary to make adjustments. It is necessary to confirm and make adjustments when the parts of the tape running mechanism are replaced because of extensive usage or failure. When adjusting P2, P3 and Value X, be careful to the Primary side of Main PCB on the Video Block for a electric shock. So, use a insulator material such as plastic for JIG driver grip.

2-1: GUIDE ROLLER

Connect CH-1 on the oscilloscope to TP4002 (PB Envelope) and CH-2 to TP4001 (SW Pulse).

Set the tracking to manual center position in the following way. Press and hold the tracking auto button more than 2 seconds to set the tracking to center position.

Trigger with SW pulse and observe the envelope.

(Refer to Fig. 2-1-A)

Adjust the guide roller height while observing the envelope, and make the envelope flat. Adjust the envelope so that the flatness will not be affected even when the tracking control button is pressed. (Use the adjustment screwdriver JG005).

Press and hold the tracking control button and (at the point that the envelope waveform starts to reduce) adjust the envelope so that the A : B ratio is better than 3 : 2.

(Refer to Fig. 2-1-B)

Adjust the PG shifter (ELECTRICAL ADJUSTMENTS :

ITEM 3-1) in the PLAY mode.

NOTE

After adjustment, confirm and adjust A/C head tilt.

(Refer to item 2-2)

Fig. 1-4

D1-2

CH-1 PB Envelope (TP4002)

CH-2 SW Pulse (TP4001)

CH-1 Track

CH-2 Track

Fig. 2-1-A

Maximum

MECHANICAL ADJUSTMENTS

EndingBeginning

A:B=3:2

Maximum

Audio/Control Head

Fig. 2-1-B

2-2: CONFIRMATION AND ADJUSTMENT OF A/C

HEAD TILT

When the tape is running abnormally, perform the following adjustments.

Insert a new tape and play it back.

Confirm that there is no crease on the tape between the P4 post and guide roller (R) and the tape is running smoothly. (It is absolutely impossible to get satisfactory sound if the tape is distorted between the A/C head and P4 post.)

If the tape still does not run smoothly, turn the screw 1 and adjust the tilt of the A/C head. (Refer to Fig. 2-2)

Drum

Guide Roller R

Tape

X Value Adjustment Driver Hole

Audio/Control Head

P4 Post

Fig.2-2

0.25mm

Video Tape

Fig. 2-3

2-4: TAPE RUNNING ADJUSTMENT

Adjust the height of reel disk.

(Refer to item 1-1)

Confirm and adjust tension post position.

(Refer to item 1-2)

Adjust the guide roller.

(Refer to item 2-1)

Adjust the A/C head tilt.

(Refer to item 2-2)

Adjust the A/C head height and azimuth.

(Refer to item 2-3)

Connect CH-1 on the oscilloscope to TP4001 and CH-2 to TP4002. Playback the VHS alignment tape (JG001C). Set the tracking to manual center. Adjust X with the screw driver for X (JG153) as the Fig. 2-1-A and Fig. 2-1-B.

(Refer to No. 2 of the item 2-1).

2-3: ADJUSTMENT OF A/C HEAD HEIGHT AND

AZIMUTH

Playback a VHS alignment tape (JG001C) and observe the waveform at the audio output terminal.

Turn the screw 2 slowly to change the azimuth of the A/C head. Adjust the height so that the audio output becomes maximum. (Refer to Fig. 2-2)

Adjust the screw 3, (Refer to Fig. 2-2) until the height of the A/C head reaches the position against the tape as shown in Fig. 2-3.

When the control head height is not correct. (When you must turn the screw more than 45 degrees), Turn all of the screws 1, 2 and 3 to the same degrees. Then confirm the angle of the audio/control head and adjust again.

D1-3

(VCR SECTION)

MAJOR COMPONENTS LOCATION GUIDE

TP4001

TP1001

IC101

IC4001

C101

TP4002

IC601

J4501

J4502

TU6001

SYSCON

VR6001

L6012

IC6001

L6011

CP6115

CP6001

TP4501

D2-1

ELECTRICAL ADJUSTMENTS

(VCR SECTION)

3. ADJUSTMENT PROCEDURE

Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies.

CAUTION

When replacing IC's or transistors, use a silicon grease. (To prevent the damage to IC's and transistors.)

3-1: PG SHIFTER (HEAD SWITCHING) ADJUSTMENT CONDITIONS

MODE-PLAYBACK Input Signal-Alignment Tape (JG001C) or Similar

INSTRUCTIONS

Connect CH-1 on the oscilloscope to TP4001 and CH-2 to TP4501.

Playback the alignment tape. (JG001C)

Press and hold the Tracking Auto button more than 2 seconds to set the tracking to center position.

Press the VOL. DOWN button on the set and the channel button (3) on the remote control simultaneously until the indicator REC disappears. If the indicator REC disappears, adjustment is completed.

(If the above adjustments doesn't work well:)

Press the VOL. DOWN button on the set and the

6. channel button (3) on the remote control simultaneously until the indicator REC disappears. When the REC indicator is blinking, press both VOL.

7. DOWN key on the set and the channel button (4) on the remote control simultaneously and adjust the Tracking +/- button until the arising to the down of the Head Switching Pulse becomes 6.5 ± 0.5H. Press the Tracking Auto button.

3-2: VCO COIL NOTE

For adjusting of VCO, connect input and output terminals of sweepmarker generator to the circuit as shown below, then adjust it.

Sweepmarker Generator

Output

Input

0.022µF

75K

47K IN60 45PF

100PF

IN60

GND

CONDITION

MODE-STOP

INSTRUCTIONS

Connect the output of sweepmarker generator to pin 5 of IC6001.

Connect the input of sweepmarker generator to pin 17 of IC6001.

Connect a 10K ohm variable resistor to IF AGC terminal (pin 4 of IC6001), 9V line and ground, then adjust to make the waveform of the oscilloscope readable.

Adjust L6011 until the waveform marker (39.5MHz) becomes as shown in Fig. 3-2.

39.5MHz

Fig. 3-2

6.5H

CH-2

CH-1

CH-2

CH-1

Fig. 3-1-A

Fig. 3-1-B

3-3: AFT COIL CONDITION

INSTRUCTIONS

D2-2

MODE-STOP

Connect the output of sweepmarker generator to pin 5 of IC6001. Connect the input of sweepmarker generator to pin 3 of CP6115. Adjust L6012 until the waveform marker (39.5MHz) becomes as shown in Fig. 3-3. Disconnect the sweepmarker generator and the oscilloscope. Connect the generator (39.5MHz) to the pin 4 of CP6115 through 2.2K ohm and connect the DC voltmeter to pin 3 of CP6115. Adjust L6012 until the DC voltage at pin 3 of CP6115 is

3.8V ± 0.1V.

ELECTRICAL ADJUSTMENTS

39.5MHz

3-4: COLOR LEVEL CONDITIONS

MODE-STOP

INSTRUCTIONS

1.2.Connect the oscilloscope to TP4501. When the Y-LEVEL is 100%, adjust the VR6001 until the MAGENTA Section LEVEL becomes 45 ± 5%.

(Refer to Fig. 3-4)

Fig. 3-3

45%

100%

Fig. 3-4

D2-3

(TV SECTION)

MAJOR COMPONENTS LOCATION GUIDE

FB401

T501

SCREEN VOLUME

FOCUS VOLUME

TP401

VR502

J801

MAIN

TP801

TP803

CRT

D3-1

ELECTRICAL ADJUSTMENTS

(TV SECTION)

4. BASIC ADJUSTMENTS

On-Screen Display Adjustment

Unplug the AC plug for more than 30 minutes to set the clock to the non-setting state. (To release the Back-Up immediately, take the short circuit between C101 and GND at the Power Off.) Then, set the volume level to minimum. Press the VOL. DOWN key on the set and the Channel button (9) on the remote control simultaneously to appear the adjustment mode on the screen as shown in Fig. 4-1,

Fig. 4-2, Fig. 4-3, Fig. 4-4, Fig. 4-5 and Fig. 4-6. NOTE

Use the 1 - 7 keys on the remote control to select the options shown in Fig. 4-1, Fig. 4-2, Fig. 4-3, Fig. 4-4, Fig. 4-5 and Fig. 4-6. Press the 8 key to end the adjustments.

ADJUSTMENT MODE1

1. H PHASE

2. V DC

3. V SIZE

4. AGC

5. CUT OFF

6. OSD H

7. NEXT 8. END

ADJUSTMENT MODE4

1. R-Y B OFFSET

2. B-Y B OFFSET

7. NEXT 8. END

"The adjustment items 1 and 2 are not used for this model."

ADJUSTMENT MODE5

1. WIDE V SART

2. WIDE V STOP

3. WIDE P SART

4. WIDE P STOP

5. V S-COR

6. V LINEA

7. NEXT 8. END

"The adjustment items 1, 2, 3, 4 and 5 are not used for this model."

Fig. 4-4

Fig. 4-5

"The adjustment item 4 is not used for this model."

Fig. 4-1

ADJUSTMENT MODE2

2. RED BIAS

3. GREEN BIAS

4. BLUE BIAS

5. GREEN DRIVE

6. BLUE DRIVE

7. NEXT 8. END Fig. 4-2

ADJUSTMENT MODE3

1. BRIGHT

2. CONTRAST

3. COLOR

4. TINT

5. SHARPNESS

6. E-RGB CONT

7. NEXT 8. END

"The adjustment items 5 and 6 are not used for this model."

Fig. 4-3

ADJUSTMENT MODE6

1. H PHASE 60

2. WIDE V STOP 60

3. V LINEA 60

7. NEXT 8. END

"The adjustment item 2 is not used for this model."

Fig. 4-6

4-1: CUT OFF

1.2.Activate the adjustment mode display of Fig. 4-1 and press the channel button (5) on the remote control. Adjust the Screen Volume until picture is distinct.

4-2: WHITE BALANCE

1.2.Receive the color bar pattern. Adjust the adjustment mode display of Fig. 4-2 until the white color is looked like a white.

4-3: FOCUS

Receive the broadcasting signal.

1. Adjust the Focus Volume until picture is distinct.

D3-2