Self-Diagnostic Function - Sony KP-46WT520 Service Manual

Ax-1x chassis color rear video projection
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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
Power does not turn on
+B Overcurrent (OCP)*
+B Overvoltage (OVP)
Vertical Deflection Stopped
White Balance Failure
(not balanced)
LOW +B OCP/OVP
(overcurrent/overvoltage)***
Horizontal Deflection
Stopped
Audio Protection
Zero Crossing Detector
HV Protection
* 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.
KP-46WT520/51WS520/57WS520

SELF-DIAGNOSTIC FUNCTION

No. of times
STANDBY /
Display
TIMER lamp
Result
flashes
Does not light
_______
2 times
2:0 or 2:1
3 times
3:0 or 3:1
4 times
4:0 or 4:1
5 times
5:0 or 5:1
6 times
6:0 or 6:1
7 times
7:0 or 7:1
8 times
8:0 or 8:1
9 times
9:0 or 9:1
10 times
10:0 or
10:1
Probable Cause Location
Power cord is not plugged in.
Fuse is burned out (F6000). (G Board)
H.OUT (Q5001) is shorted. (D Board)
+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 (IC452) is faulty.
(A Board)
G2 is improperly adjusted.**
+5 line is overloaded.
(A and BM Boards)
+5 line is shorted. (A and BM Boards)
IC303 is faulty. (A Board)
Q5006 is broken (D Board)
IC452 is faulty (A Board)
+ or - 22V audio supply is not
present—Check PS600 & PS601
Audio AMP is damaged IC601 on
A Board
D6116 or D6301 is open (G Board)
Q8014 or Q8013 have shorted replace
along with R8051 on D Board
IC8005 is damaged (D Board)
KP-46WT520/51WS520/57WS520
Self Diagnosis
Supported model
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 shorted.
Has entered standby mode.
Has entered standby mode after
Horizontal raster.
Vertical deflection pulse is stopped.
Power line is shorted or power
supply is stopped.
No raster is generated.
CRT cathode current detection
reference pulse output is small.
No picture
No picture
No picture
No picture
No picture
7

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Kp-51ws520Kp-57ws520

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