KP-FX432M90, KP-FX532M90 - Sony TV Service Manual (repair manual). Page 5

– 5 –

• Power does not

turn on

• +B overcurrent

(OCP)

•+B overvoltage

(OVP)

• Vertical deflection

stopped

• White balance

failure
(not  balanced)

•LOW B down***

• Horizontal

deflection stopped

• Audio Protection

• Zero crossing

detector

• HV protection

• Power does not come on.
• No power is supplied to the PJ.
• AC power supply is faulty.

• Power does not come on.
• Load on power line is shorted.

• Has entered standby mode.

• Has entered standby mode after

horizontal raster.

• Vertical deflection pulse is

stopped.

• Power line is shorted or power.

• No raster is generated.
• CRT cathode current detection

reference pulse output is small.

• No picture.

• No picture.

• No picture.

•No picture.

• No picture.

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

begin to flash.

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

flash indicators is listed in the instruction manual for the user's knowledge and reference. If an error symptom cannot be repro-

duced, 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.

When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem.

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

Result for all of the following diagnostic items are displayed on screen. If the screen displays a “0”, no error has occurred.

Item  2:1

or more than 1

Item  3:1

or more than 1

Item  4:1

or more than 1

Item  5:1

or more than 1

Item  6:1

or more than 1

Item  7:1

or more than 1

Item  8:1

or more than 1

Item  9:1

or more than 1

Item  10:1

or more than 1

No. of times

STANDBY/TIMER

LED flashes

Symptoms

Diagnostic

Item

Description

Self-diagnostic

display/

Diagnostic result

Probable Cause Location

Does not light

2 times

3 times

4 times

5 times

6 times

7 times

8 times

9 times

10 times

• Power cord is not plugged in.
• Fuse (F6000) is burned out.

(A board)

• H. OUT(Q5001) is shorted.
• +B PWM(Q5201) is shorted.

(D board)

• IC6503 is faulty. (D board)

• 15V is not supplied. (D board)
• IC5101 is faulty. (D baord)

• Video

OUT(IC9101,IC9201,IC9301)
is faulty. (CR,CG,CB board)

• CRT drive (IC0401) is faulty.

(MG board)

• G2 is impropenrly adjustd.**

• +5V line is overloaded.

(A, BM, MG boards)

• +5V line is shorted.

(A, BM, MG boards)

• IC6201is faulty. (A board)

• Q5006 is broken. (D board)
• IC0401 is faulty. (MG board).

• + or - 22V audio supply is not

present - Check PS2001 &
PS2000

• D6166 or D6114 is open.

(A board)

• Q8014 or Q6013 have

shorted replace along with
R8051 on D board.

• IC8005 is damaged.

(D board)

*

If a +B overcurrent is detected, stoppage of the vertical detection is detected simultaneously. The
symptom that is diagnosed first by the microcontroller is displayed on the screen.

**

Refer to screen (G2) adjustment (fine adjustment) in section 2 of this manual.

***

Is STNDBY/TIMER LED flashes six (6) times, unplug the unit and wait 10 seconds before
performing the adjustment.