Sony Hi-Scan KP-51WS520, Service Manual

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KP-46WT520/51WS520/57WS520
KP-46WT520/51WS520/57WS520 7
SELF-DIAGNOSTIC FUNCTION
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.
Diagnostic Item
No. of times
STANDBY /
TIMER lamp
flashes
Display
Result
Probable Cause Location Detected Symptoms
Power does not turn on Does not light _______
•
Power cord is not plugged in.
•
Fuse is burned out (F6000). ( G Board)
•
Power does not come on.
•
No power is supplied to the TV.
•
AC Power supply is faulty.
+B Overcurrent (OCP)* 2 times 2:0 or 2:1
•
H.OUT (Q5001) is shorted. (D Board)
•
+B PWM (Q5201) is shorted.
(D Board)
•
Power does not come on.
•
Load on power line shorted.
+B Overvoltage (OVP) 3 times 3:0 or 3:1
•
IC6503 is faulty. (D Board)
•
Has entered standby mode.
Vertical Deflection Stopped 4 times 4:0 or 4:1
•
15V is not supplied. (D Board)
•
IC5101 is faulty. (D Board)
•
Has entered standby mode after
Horizontal raster.
•
Vertical deflection pulse is stopped.
•
Power line is shorted or power
supply is stopped.
White Balance Failure
(not balanced) 5 times 5:0 or 5:1
•
Video OUT (IC9101, IC9201, IC9301)
is faulty. (CR, CG, CB Board)
•
CRT drive (IC 452 ) is faulty.
(A Board)
•
G2 is improperly adjusted.**
•
No raster is generated.
•
CRT cathode current detection
reference pulse output is small.
LOW +B OCP/OVP
(overcurrent/overvoltage)*** 6 times 6:0 or 6:1
•
+5 line is overloaded.
(A
and
BM Boards)
•
+5 line is shorted. ( A and BM Boards)
•
IC 303 is faulty. (A Board)
•
No picture
Horizontal Deflection
Stopped 7 times 7:0 or 7:1
•
Q5006 is broken (D Board)
•
IC 452 is faulty (A Board)
•
No picture
Audio Protection 8 times 8:0 or 8:1
•
+ or - 22V audio supply is not
present—Check PS 600 & PS 601
•
Audio AMP is damaged IC 601 on
A Board
•
No picture
Zero Crossing Detector 9 times 9:0 or 9:1
•
D61 1 6 or D6 301 is open ( G Board)
•
No picture
HV Protection 10 times 10:0 or
10:1
•
Q8014 or Q8013 have shorted replace
along with R8051 on D Board
•
IC8005 is damaged (D Board)
•
No picture
* 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.
** Refer to Screen (G2) Adjustment (Fine Adjustments) in Section 2 of this manual.
*** If STANDBY/STEREO LED flashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment.
Self Diagnosis
Supported model