KV-DB29M61 - Sony TV Service Manual (repair manual). Page 3

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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.

• H pulse output is too high.

• Power does not come on.

• Vertical deflection pulse is

stopped.

• Vertical size is too small.
• Vertical deflection stopped.

• No raster is generated.
• CRT cathode current

detection reference pulse
output is small.

• TV Blank
• No Raster

• Power is shut down shortly,

after this return back to
normal.

• Detect Micro latch up.

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. 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 error occurs, the STANDBY/TIMER lamp will flash a 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)

• Horizontal

deflection failure

• +B overvoltage

(OVP)

• Vertical deflection

failure

• White balance

failure (no
PICTURE)

• 5V/9V failure

• Micro reset

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

3 times

4 times

5 times

8 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255

003:000 or

003:001~255

004:000 or

004:001~255

005:000 or

005:001~255

008:000 or

008:001~225

101:00 or

101:001~225

Probable

Cause

Location

• Power cord is not plugged in.
• Fuse is burned out F1601

(F1 Board)

• H.OUT Q6802 is shorted.
• C6831 is open circuit.

PS6606 open, PS6605 open.
(D board)

• PH6602 faulty.

D6644 faulty, R6651 open.

• 10.5V is not supplied.

(D board)

• V.OUT IC6800 faulty

D6816 faulty
D6817 faulty
D6824 faulty
R6852 open
R6851 open (D board)

• G2 is improperly adjusted.
• CRT problem.
• Video OUT IC9001, 9002,

9003 are faulty. (C1 board)

• IC4301 CXA2170Q

(A1 board) are faulty.

• 5V regulator (IC2601) faulty.
• 9V regulator (IC2600) faulty.

• CRT Discharge (C1 Board)
• Static discharge
• External noise

The example above represents for 4 times blink

Lamp OFF 3 seconds 

Lamp ON 300ms

Lamp OFF 300ms

Standby indicator