Sony KV-2119M5J, KV-J21MF2J Service Manual

SERVICE MANUAL

LekSound&Vision'50

BG-1S

CHASSIS

MODEL COMMANDER DEST. CHASSIS NO.

TRINITRON

COLOR TV

SPECIFICATIONS

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KV-2119M5J KV-J21MF2J Note

Power requirements 110-240 V AC, 50/60 Hz Power consumption (W) Indicated on the rear of the TV Television system B/G B/G, I, D/K, M Color system Channel coverage

B/G VHF: E2 to E12 / UHF: E21 to E69 / CATV: S01 to S03, S1 to S41 I – UHF: B21 to B68 / CATV : S01 to S03, S1 to S41 D/K VHF: C1 to C12, R1 to R12/

Audio output (speaker) 3W + 3W Inputs ˘ (antenna): 75 ohms external terminal

Outputs A (earphone) jack: mini jack 2 (headphones) jack

Picture tube 21in.

Tube size (cm) 54

Screen size (cm) 51

Dimensions (w/h/d, mm) 610 × 470 × 474 Mass (kg) 22

PAL, P AL 60, SECAM, NTSC4.43, NTSC3.58 (AV IN)

– UHF: C13 to C57, R21 to R60/

–

… (video input) jacks: phono jacks D (video): 1 Vp-p, 75 ohms

≥ (audio): 500 mVrms, high impedance

Ú (monitor output) jacks: phono jacks

D (video): 1 Vp-p, 75 ohms

≥ (audio): 500 mVrms

Design and specifications are subject to change without notice.

P AL, PAL 60, SECAM, NTSC4.43, NTSC3.58

CATV: Z1 to Z39, S01 to S03, S1 to S41 VHF: A2 to A13 / UHF: A14 to A79 / CATV : A-8 to A-2, A to W+ 4, W+ 6 to W+ 84

Measured

diagonally

Measured

diagonally

CAUTION

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.

COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE SCHEMA TIC DIA GRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

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SAFETY-RELATED COMPONENT WARNING!!

TABLE OF CONTENTS

LekSound&Vision'50

Section Title Page Section Title Page

1. GENERAL....................................................................... 4

2. DISASSEMBLY

2-1. Rear Cover Removal .............................................. 8

2-2. A Board Removal ................................................... 8

2-3. Service Position ...................................................... 8

2-4. Replacement of Parts .............................................. 8

2-5. Demagnetization Coil and Picture Tube Removal. 9

3. SET-UP ADJUSTMENTS

3-1. Beam Landing ......................................................... 10

3-2. Convergence ........................................................... 11

3-3. Focus Adjustment ................................................... 13

3-4. G2 (Screen) and White Balance Adjustments........ 13

4. SELF DIAGNOSIS FUNCTION............................... 14

5. CIRCUIT ADJUSTMENTS

5-1. Adjustments with Commander ............................... 15

5-2. Adjustment Method ................................................ 16

5-3. A Board Adjustment after IC003 (Memory)

Replacement............................................................ 20

5-4. Picture Distortion Adjustment ................................ 20

6. DIAGRAMS

6-1. Block Diagrams ...................................................... 21

6-2. Circuit Boards Location ......................................... 23

6-3. Schematic Diagrams and Printed Wiring Boards... 23

(1) Schematic Diagram of A Board.............................. 29

(2) Schematic Diagrams of C and VM Boards ............ 33

6-4. Semiconductors ....................................................... 37

7. EXPLODED VIEWS

7-1. Chassis .................................................................... 39

8. ELECTRICAL PARTS LIST...................................... 40

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3-3. FOCUS ADJUSTMENT

SERVICE

MUTING

1 F

DATA

RDR

Adjustment Item

Item number

WRITE1 FRDR09

Executes the writing

Green

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Adjust FOCUS control on the flyback transformer for the best focus.

FOCUS

SCREEN (NOT USED)

FLYBACK TRANSFORMER (T851)

Note: Screen VR is not used.

a. AN ITEM OF ADJUSTMENT

Item number

09 RDR 25 WHITE POINT R 0A GDR 20 WHITE POINT G 0B BDR 20 WHITE POINT B

Adjustment item

Initial DATA

Note

3-4. G2 (SCREEN) AND WHITE BALANCE

ADJUSTMENTS

1. G2 (SCREEN) ADJUSTMENT (RV701)

1) Set the PICTURE and BRIGHTNESS to normal.

2) Put to VIDEO input mode without signals.

3) Connect R, G, and B of the C board cathode to the oscilloscope.

4) Adjust G2 (RV701) volume to the value below.

b. METHOD OF CANCELLATION FROM SERVICE

MODE

Set the standby condition (Press [POWER] button on the commander) and then press [POWER] button again, hereupon it becomes TV mode.

c. METHOD OF WRITE FOR MEMORY

1) Set to Service Mode.

2) Press [1] (UP) and [4] (DOWN), select the item for adjustment.

3) Press [MUTING] button indicate WRITE (Green) on screen.

4) Press [0] button to write into memory.

d. MEMORY WRITE CONFIRMATION METHOD

1) After adjustment, pull out the plug from the AC outlet, and then plug into the AC outlet again.

2) Turn the power switch ON and set to Service Mode.

3) Call the adjusted items again to confirm adjustments were made.

2. WHITE BALANCE ADJUSTMENTS

1) Set to Service Mode.

2) Input an entire white signal.

3) Set the PICTURE to maximum.

4) Select RDR(09) with [1] and [4] , and then set the level to 25 with [3] and [6] .

5) Select GDR(0A) and BDR(0B) with [1] and [4] and adjust the level with [3] and [6] for the best white balance.

6) Write into the memory by pressing [MUTING] then [0] .

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177±2 V DC

0 V

SECTION 4

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SELF DIAGNOSIS FUNCTION

If no acknowledgement is returned from a device which is turned "ON", the device has a problem. In this case, one of the LED's responding to the problem device will flicker a defined number of times.

Flickering is operated by lighting the LED's for 60ms each time.

The flickering frequency responding to each failed device is shown below.

Board name Ref. No.

Device

Flickering Frequency

All the devices are checked one after another from the left of the table. If an error is found, the responding LED will start flickering. So, if more than 1 device have failed, only the one on the left side will flicker.

A Board

IC003

NONVOLATILE

MEMORY

(ST24C04FB6)

A Board

IC300

Y/C JUNGLE

(TDA8375A)

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+ 9 hidden pages

Sony KV-2119M5J, KV-J21MF2J Service Manual

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