Sony Trinitron KV-PF14K70 Manual de usuario

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MODEL COMMANDER DEST. CHASSIS NO.

KV-PF14K70 RM-960 Korea SCC-U 5B-A

MODEL COMMANDER DEST. CHASSIS NO.

CHASSIS

TRINITRON

COLOR TV

SERVICE MANUAL BG-3S

789

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KV-PF14K70

RM-960

SPECIFICATIONS

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.

SAFET -RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED B SHADING AND MARK ! ON THE

SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS

LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE

COMPONENTS WITH SON PARTS WHOSE PART NUMBERS

APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS

PUBLISHED B SON . CIRCUIT ADJUSTMENTS THAT ARE

CRITICAL TO SAFE OPERATION ARE IDENTIFIED IN THIS

MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL

COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS

SUSPECTED.

Note

Power requirements 110-220V AC, 60 Hz

Power consumption (W) Indicated on the rear of the TV

Television system M

Color system NTSC 3.5

Channel coverage VHF : 2 to 13/UHF : 14 to 69/CATV : 1 to 125

˘˘

˘(Antenna) 75-ohm external terminal

Audio output 3W

Number of terminal

(Video) Input : 2 Output : 1 Phono jacks; 1 Vp-p, 75 ohms

(Audio) Input : 2 Output : 1 Phono jacks; 500 mVrms

(Earphone) Output : 1 Minijack

Picture tube 14 in.

Tube size (cm) 37 Measured diagonally

Screen size (cm) 34 Measured diagonally

Dimension (w/h/d, mm) 375 x 346 x 416

Mass (kg) 13

Design and specifications are subject to change without notice.

≥

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KV-PF14K70

RM-960

TABLE OF CONTENTS

Section Title Page

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

1. GENERAL ..........................................................

2. DISASSEMBL

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

2-2. Chassis Assy Removal ............................................. 1

2-3. F Bracket Removal .................................................. 1

2-4. Service Position ....................................................... 1

2-5. Replacement of Parts ............................................... 19

2-5-1. Replacement of Multi Button ........................... 19

2-5-2. Replacement of Bar Optical ............................. 19

2-6. Terminal Bracket Removal ...................................... 19

2-7. Degauss Coil Removal............................................. 19

2- . Picture Tube Removal .............................................. 20

3. SET-UP ADJUSTMENTS

3-1. Beam Landing .......................................................... 21

3-2. Convergence ............................................................. 22

3-3. Focus Adjustment .................................................... 24

3-4. G2 (Screen) and White Balance Adjustments ......... 24

4. CIRCUIT ADJUSTMENTS

4-1. Adjustments with Commander ................................ 25

4-2. Adjustment Method ................................................. 26

4-3. Picture Quality Adjustments .................................... 31

4-4. A Board Adjustment After IC003 (Memory)

Replacement ............................................................. 31

4-5. Picture Distortion Adjustment ................................. 32

Section Title Page

5. DIAGRAMS

5-1 Block Diagram ......................................................... 33

5-2 Frame Schematic Diagram ...................................... 36

5-3 Circuit Boards Location .......................................... 3

5-4 Schematic Diagrams and Printed Wiring Boards ... 3

(1) Schematic Diagram of A(1/2) Board ................................. 41

(2) Scheamtic Diagram of A(2/2) Board ................................. 44

(3) Schematic Diagrams of C3 and F Boards ......................... 50

5-5 Semicondutors ......................................................... 53

6. EXPLODED VIEWS

6-1. Chassis ..................................................................... 55

7. ELECTRICAL PARTS LIST ............................... 57

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KV-PF14K70

RM-960

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically

begin to flash.

The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER

lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot

be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past

problems and how often these problems occur.

1. DIAGNOSTIC TEST INDICATORS

When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the

problem. If there is more than one error, the lamp will identify the first of the problem areas.

Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a “0”.

Diagnostic

Item

Description

• Power does not

turn on

• +B overcurrent

(OCP) or

overvoltage

(OVP)

• Vertical deflection

stopped

• Horizontal

deflection

overdrive

• White balance

failure (no

PICTURE)

• Micro reset

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

5 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255

00 :001~255

004:001~255

at the same time

005:000 or

005:001~225

101:00 or

101:001~225

Probable

Cause

Location

• Power cord is not plugged

in.

• Fuse is burned out F4601

(F board)

• H.OUT Q511 is shorted.

(A board)

• -1 V is not supplied.

(A board)

• IC 50 faulty (A board)

• G2 is improperly adjusted.

(Note 2)

• CRT problem.

• IC 01 is faulty. (A board)

• No connection A board to

C board.

• Discharge CRT (C Board)

• Static discharge

• External noise

Detected

Symptoms

• Power does not come on.

• No power is supplied to the

TV.

• AC power supply is faulty.

• Power does not come on.

• Load on power line is

shorted.

• Has entered standby state

after horizontal raster.

• Vertical deflection pulse is

stopped.

• Power line is shorted or

power supply is stopped.

• No raster is generated.

• CRT cathode current

detection reference pulse

output is small.

• Power is shut down shortly,

after this return back to

normal.

• Detect Micro latch up.

Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.

The symptom that is diagnosed first by the microcontroller is displayed on the screen.

Note 2: Refer to screen (G2) Adjustment in section -4 of this manual.

SELF DIAGNOSTIC FUNCTION

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KV-PF14K70

RM-960

2. DISPLA OF STANDB /TIMER LIGHT FLASH COUNT

Diagnostic Item Flash Count*

+B overcurrent/overvoltage 2 times

Vertical deflection stopped

White balance failure 5 times

* One flash count is not used for self-diagnostic.

3. STOPPING THE STANDB /TIMER FLASH

Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER lamp

from flashing.

Lamp ON 0. sec.

Lamp OFF sec.

Lamp OFF 0. sec.

2 times

5 times

STANDBY/SLEEP lamp

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KV-PF14K70

RM-960

4. SELF-DIAGNOSTIC SCREEN DISPLA

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it

is possible to bring up past occurances of failure for confirmation on the screen:

[To Bring Up Screen Test]

In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

[Screendisplay] /channel [5] /Sound volume [-] /Power ON

Note that this differs from entering the service mode (mode volume [+]).

Self-Diagnosis screen display

002 : 000

00 : 000

004 : 000

005 : 001

Numeral "0" means that no fault has been detected.

Numeral "1" means a fault has been detected.

101 : 000

SELF DIAGNOSTIC

5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLA

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen

during repairs. When you have completed the repairs, clear the result display to “0”.

Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after

completion of the repairs.

[Clearing the result display]

To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the diagnostic

screen is being displayed.

Channel [8] /0

[Quitting Self-diagnostic screen]

To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

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KV-PF14K70

RM-960

6. SELF-DIAGNOSTIC CIRCUIT

[+BovercurrentªOCPº] Occurs when an overcurrent on the +B(1 5) line is detected by Q604. If Q604 go to ON

and the voltage to pin 18 of IC 01 should go down when V.SYNC is more than seven

verticals in a period, the unit will automatically turn off.

[Verticaldeflectionstopped] Occurs when an absence of the vertical deflection pulse is detected by Q509 and IC001

shut down the power supply.

[Verticaldeflectionovercurrent] Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be

shut down when detect this by IC001.

[ hitebalancefailure] If the RGB levels* do not balance or become low level within 5 seconds, this error will be

detected by IC 01. TV will stay on, but there will be no picture.

* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)

IC 01

Y/CHROMA JUNGLE

FROM

CRT

FROM

[+B] Q604 C

[V] Q509/507

IC001

SYSTEM

IC00

MEMORY

B-DAT

IO-SDAT

IK-IN

MP/

PROTECT

IO-8DAT

O-LED

SDA

54521

18 51

465

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KV-PF14K70

RM-960

SECTION 2

DISASSEMBLY

2-2. CHASSIS ASSY REMOVAL

1 Chassis assy

Lever

2-1. REAR COVER REMOVAL

Six screws

(BVTP 4×16)

Two screw

(BVTP 4×16)

2-3. F BRACKET REMOVAL

1 Three connector

2 F boar

Lever

2-4. SERVICE POSITION

(N te: Rem ve F Bracket first.)

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KV-PF14K70

RM-960

2-6. TERMINAL BRACKET REMOVAL

A boar

Screw

Terminal boar bracket

2-7. DEGAUSS COIL REMOVAL

1Demagnetization coil

2Tension spring

Picture tube

2-5. REPLACEMENT OF PARTS

For replacement of the Multi Button an Bar Optical, unscrew to exchange with the

new parts, an fix them with screws (+BVTP) respectively.

2-5-1. REPLACEMENT OF MULTI BUTTON

Multi button

Two screws

2-5-2. REPLACEMENT OF BAR OPTICAL

Bar optical

One screw

(BVTP 3×12)

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KV-PF14K70

RM-960

2-8. PICTURE TUBE REMOVAL •REMOVAL OF ANODE-CAP

NOTE : After removing the ano e, short circuit the ano e of the picture tube an

the ano e cap to the metal chassis, CRT shiel or carbon paint on the

CRT.

•REMOVING PROCEDURES

1D n t damage the surface f an de-caps with sharp shaped bjects.

2D n t press the rubber t hard s as n t t damage the inside f an de-cap.

A metal fitting called the shatter-h k terminal is built int the rubber.

3D n t turn the f t f rubber ver t hard.

The shatter-h k terminal will stick ut r damage the rubber.

•HOW TO HANDLE AN ANODE-CAP

3When ne side f the rubber cap is separated fr m the an de butt n, the an de-cap

can be rem ved by turning up the rubber cap and pulling it up in the directi n f the

arr w c.

2Using a thumb pull up the rubber cap firmly in the directi n indicated by the arr w b.

1Turn up ne side f the rubber cap in the directi n indicated by the arr w a.

2 A boar

5 Deflection yoke

Cushion

6 Four screws

(Tapping screws)

1 Ano e cap

3 F boar

4 C3 boar

Ano e button

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