KV-PG14M40 (serv.man2) - Sony TV Service Manual (repair manual). Page 4

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The units in this manual contain a self-diagnosis function. If an error occurs, the STANDBY (

1

) indicator will automati-

cally begin to flash. A description of the self diagnosis function is explained in the instruction manual.
The number of times the STANDBY (

1

) 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 (

1

) 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”.

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 (

1

)

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

(C Board)

• Static discharge
• External noise