KV-AR29M80A - Sony TV Service Manual (repair manual). Page 3

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The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER indicator will
automatically begin to flash. A description of the self diagnostic function is explained in the instruction manual.
The number of times the STANDBY/TIMER indicator flashes translates to a probable source of the problem. 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.

When an errors occurs, the STANDBY/TIMER indicator will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the indicator will identify the first of the problem areas.

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

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 2-4 of this manual.

* R(Q703), G(Q702) or B(Q701) out is faulty (C6 board).

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

Detected

Symptoms

• Power does not turn on.
• No power is supplied to the

TV.

• AC power supply is faulty.

• Power does not turn 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.

No. of times

STANDBY/TIMER

indicator flashes

Does not light

2 times

5 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255
003:001~255
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).

• H.OUT Q511 is shorted.

(A board)

• Q701, Q702, Q703 is

shorted (C6 board)

• -13V is not supplied.

(A board)

• IC 503 faulty (A board)

• G2 is improperly adjusted.

(Note 2)

• CRT problem.
• R(Q703), G(Q702) or

B(Q701) out is faulty
(C6 board)

• IC301 is faulty. (A board)
• No connection A board to

C6 board.

• Discharge CRT (C6 Board)
• Static discharge
• External noise