Self-Diagnostic Function - Sony TRINITRON KD-32XS945 Service Manual

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", an error has occurred.
Diagnostic Item
Power does not turn on
+B Overcurrent (OCP)*
Low +B Overvoltage (OVP)
Vertical Deflection Stopped
White Balance Failure
(not balanced)
LOW +B OCP/OVP
(overcurrent/overvoltage)***
Horizontal Deflection
Stopped
* 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) in Section 2-5 of this manual.
*** If STANDBY/STEREO LED flashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment.
Display of Standby/Timer LED Flash Count
Diagnostic items Flash count
+B Overcurrent
Low +B Overvoltage
Vert. Deflection Stopped
White Balance Failure
Low +B OCP/OVP
Horiz. Deflection Stopped
Lamp ON 0.3 sec.
Lamp OFF 0.3 sec.
Stopping the Standby/Timer LED Flash
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER LAMP from fl ashing.
KD-32XS945

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
2 times
3 times
4 times
5 times
6 times
7 times
Lamp OFF 3 sec.
Probable Cause Location
• Power cord is not plugged in.
• Fuse is burned out (F501). (A Board)
• H.OUT (Q5030) is shorted. (D Board)
• +B PWM (Q5003) is shorted.
(D Board)
• IC6505 is faulty. (D Board)
• 15V is not supplied. (D Board)
• IC5004 is faulty. (D Board)
• Video OUT (IC9001-IC9003) is faulty.
(CX, Board)
• CRT drive (IC2801) is faulty. (B
Board.)
• G2 is improperly adjusted.**
• +5 line is overloaded. (A, B, M Boards)
• +5 line is shorted. (A, B, M Boards.)
• IC504 is faulty. (AY Board)
KD-32XS945
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
Standby/Timer LED
* One fl ash count is not used for
self-diagnostic.
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