KP-46WT520, KP-51WS520, KP-57WS520 (serv.man3) - Sony TV Service Manual (repair manual). Page 6

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to fl ash. The number 
of times the LED fl ashes translates to a probable source of the problem. A defi nition of the STANDBY/TIMER LED fl ash 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.

Diagnostic Test Indicators
When an error occurs, the STANDBY/TIMER LED will fl ash a set number of times to indicate the possible cause of the problem. If there is more than 
one error, the LED will identify the fi rst of the problem areas.

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

Power

doesnotturnon

Does

notlight

_______

• Powercordisnotpluggedin.
• Fuseisburnedout(F6000).(ABoard)

• Powerdoesnotcomeon.
• NopowerissuppliedtotheTV.
• ACPowersupplyisfaulty.

+B

Overcurrent(OCP)*

2

times

2:0

or2:1

• H.OUT(Q5001)isshorted.(DBoard)
• +BPWM(Q5201)isshorted.

(D

Board)

• Powerdoesnotcomeon.
• Loadonpowerlineshorted.

Low

+BOvervoltage(OVP)

3

times

3:0

or3:1

• IC6503isfaulty.(DBoard)

• Hasenteredstandbymode.

Vertical

DeflectionStopped

4

times

4:0

or4:1

• 15Visnotsupplied.(DBoard)
• IC5101isfaulty.(DBoard)

• Hasenteredstandbymodeafter

Horizontal

raster.

• Verticaldeflectionpulseisstopped.
• Powerlineisshortedorpower

supply

isstopped.

White

BalanceFailure

(not

balanced)

5

times

5:0

or5:1

• VideoOUT(IC9101,IC9201,IC9301)

is

faulty.(CR,CG,CBBoard)

• CRTdrive(IC0401)isfaulty.

(A

Board)

• G2isimproperlyadjusted.**

• Norasterisgenerated.
• CRTcathodecurrentdetection

reference

pulseoutputissmall.

LOW

+BOCP/OVP

(overcurrent/overvoltage)***

6

times

6:0

or6:1

• +5lineisoverloaded.

(A

andBHBoards)

• +5lineisshorted.(A,BHBoards)
• IC303isfaulty.(ABoard)

• Nopicture

Horizontal

Deflection

Stopped

7

times

7:0

or7:1

• Q5006isbroken(DBoard)
• IC452isfaulty(ABoard)

• Nopicture

Audio

Protection

8

times

8:0

or8:1

• +or-22Vaudiosupplyisnot

presentó Check

PS600&PS601

• AudioAMPisdamagedIC601on

A

Board

• Nopicture

Zero

CrossingDetector

9

times

9:0

or9:1

• Q6301,PH6301circuitarefaulty

(G

Board)

• Nopicture

HV

Protection

10

times

10:0

or

10:1

• Q8014orQ8013haveshortedreplace

along

withR8051onDBoard

• IC8005isdamaged(DBoard)

• Nopicture

*

 Ifa+Bovercurrentisdetected,stoppageoftheverticaldeflectionisdetectedsimultaneously.Thesymptomthatisdiagnosedfirstbythe

microcontroller

isdisplayedonthescreen.

**

RefertoScreen(G2)Adjustment(FineAdjustments)inSection2ofthismanual.

***

IfSTANDBY/STEREOLEDflashessix(6)times,unplugtheunitandwait10secondsbeforeperformingtheadjustment.