KV-PG21M10 - 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 automati-
cally 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 symp-
tom 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”.

Diagnostic

Item

Description

• Power does not

turn on

• +B overcurrent

(OCP)

• Horizontal

deflection
overdrive

• White balance

failure (no
PICTURE)

• Vertical deflection

stopped

• Micro reset

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.

• Power line is shorted or

power supply is stopped.

• Vertical deflection pulse

 is stopped

• 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 3-4 of this manual.

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

4 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255

004:000 or

004:001~225

101:00 or

101:001~225

Probable

Cause

Location

• Power cord is not

plugged in.

• Fuse is burned out

F4601 (F)

• H.OUT Q801 is shorted.

(A board)

• -13V is not supplied.

(A board)

• IC 551 faulty (A board)

• Discharge CRT

(CV Board)

• Static discharge
• External noise