KP-FR53M94 - Sony TV Service Manual (repair manual). Page 4

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The unit in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically
begin to flash.
The number of times the LED flashes translates to a probable source of the problem. A defination of the STANDBY/TIMER
LED flash indicators is listed in the intruction 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 error occurs, the STANDBY/TIMER LED will flash a number of times to indicate the possible cause of the
problem. If there is more than one error, the LED will identify the first of the problem areas.

Result for all of the following diagnostic items are displayed on screen. If the screen displays a “0”, no error has occurred.

*

If a +B overcurrent is detected, stoppage of the vertical detection is detected simultaneously. The symptom that is

diagnosed first by the microcontroller is displayed on the screen.

**

Refer to screen (G2) adjustment (fine adjustment) in section 2 of this manual.

***

Is STANDBY/TIMER LED flashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment.

Diagnostic

Item

Description

• Power does not

turn on

• +B overcurrent

(OCP)

• +B overvoltage

(OVP)

• Vertical deflection

stopped

• White balance

failure
(not balanced)

• LOW B down***

• Horizontal

deflection
stopped

• Audio Protection

• Zero crossing

detector

• HV protection

No. of times

STANDBY/TIMER

LED flashes

Does not light

2 times

3 times

4 times

5 times

6 times

7 times

8 times

9 times

10 times

Self-diagnostic

display/

Diagnostic result

—

Item 2:1

or more than 1

Item 3:1

or more than 1

Item 4:1

or more than 1

Item 5:1

or more than 1

Item 6:1

or more than 1

Item 7:1

or more than 1

Item 8:1

or more than 1

Item 9:1

or more than 1

Item 10:1

or more than 1

Probable Cause  Location

• Power cord is not plugged

in.

• Fuse (F6000) is burned out.

(A board)

• H.OUT (Q5001) is shorted.
• +B PWM (Q5201) is

shorted. (D board)

• IC6503 is faulty. (D board)

• 15V is not supplied.

(D board)

• IC5101 is faulty. (D board)

• Video Out

(IC9101,IC9201,IC9301)
is faulty. (CR,CG,CB board)

• CRT drive (IC0401) is faulty.

(MG board)

• G2 is impropenrly adjustd.**

• +5V line is overloaded.

(A, BM, MG boards)

• +5V line is shorted.

(A, BM, MG boards)

• IC6201 is faulty. (A board)

• Q5006 is broken. (D board)
• IC0401 is faulty. (MG board)

• + or - 22V audio supply

is not present - Check
PS2001 & PS2000.

• D6166 or D6114 is open.

(A board)

• Q8014 or Q6013 have

shorted replace along with
R8051 on D board.

• IC8005 is damaged.

(D board)

Symptoms

• Power does not come on.
• No power is supplied to the PJ.
• AC power supply is faulty.

• Power does not turn on.
• Load on power line is shorted.

• Has entered standby mode.

• Has entered standby mode

after horizontal raster.

• Vertical deflection pulse is

stopped.

• Power line is shorted or power.

• No raster is generated.
• CRT cathode current detection

reference pulse output is small.

• No picture.

• No picture.

• No picture.

• No picture.

• No picture.