KV-HS29M90 - Sony TV Service Manual (repair manual). Page 4

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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.

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”.

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 3-4 of this manual.

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.

• Power does not come on.

• Vertical deflection pulse is

stopped.

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

• Power line is shorted or

power supply is stopped.

• No raster is generated.
• CRT cathode current

detection reference pulse
output is small.

• H pulse output is too high.
• Low B (-10.5V) is too Low.

• There is picture but speaker

does not release sound.

• Power is shut down shorlty,

after this return back
tonormal

• Detect Micro latch up.

Probable

Cause

Location

• Power cord is not plugged

in.

• Fuse is burned out F1601

(F1 Board)

• H.OUT Q5030 is shorted.
• Q5003(PWM-OUT) is

shorted.

• PH 6502 faulty.
• 135V Line is overvoltage

supplied. (D board)

• V.OUT IC5004 faulty

D5001 faulty
D5002 faulty
D5035 faulty
D5036 faulty
R5173 or R5172 open.

• G2 is improperly adjusted.

(Note 2)

• CRT problem.
• Video OUT IC9001,9002,

9003 are faulty. (C1 board)

• IC4301  (E board) are faulty.
• No connection E board to

C1 board.

• C5064 is open circuit.
• CN5002(D board) is

disconnected.

• HOP circuit is failure.
• -10.2V Power Supply or

IC2601 or IC2602 are
failure.

• CN6101 (D board) is

disconnected

• Power Supply fails.
• IC2003, IC1204 faulty.

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

Diagnostic

Item

Description

• Power does not

turn on

• +B overcurrent

(OCP) or

• +B overvoltage

(OVP)

• Vertical deflection

failure

• White balance

failure
(no PICTURE)

• Horizontal

deflection failure

• Audio Protection

• Micro reset

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255

003:000 or

003:001~255

004:000 or

004:001~225

005:000 or

005:001~225

006:000 or

006:001~225

007:000 or

007:001~22500

101:00 or

101:001~225

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

3 times

4 times

5 times

6 times

7 times

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