Sony Trinitron KV-27FV310 - SELF-DIAGNOSTIC FUNCTION; Diagnostic Test Indicators and Troubleshooting Guide

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KV-27FV310/29FV310/32FV310/36FV310
SELF-DIAGNOSTIC FUNCTION
Display of Standby/Timer LED Flash Count
3 times
2 times
4 times
5 times
9 times
10 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF
3 sec.
Diagnostic Item Flash Count*
+B Overcurrent 2 times
+B Overvoltage 3 times
V-STOP 4 times
IK (AKB) 5 times
Zero Cross 9 times
9V 10 times
*One ash count is not used for self-diagnostic.
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to ash. The number
of times the LED ashes translates to a probable source of the problem. A denition of the STANDBY/TIMER LED 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 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 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.
Self Diagnosis
Supported model
Diagnostic Item
No. of times
STANDBY / TIMER
lamp flashes
Probable Cause Location Detected Symptoms
Power does not turn on Does not light
� Power cord is not plugged in.
� Fuse is burned out (F601). (GK Board)
� Power does not come on.
� No power is supplied to the TV.
� AC Power supply is faulty.
+B overcurrent (OCP)* 2 times
� H.OUT (Q502) is shorted. (A Board)
� IC702 is shorted. (C Board)
� Power does not come on.
� Load on power line shorted.
+B overvoltage (OVP) 3 times
� IC501 is faulty. (A Board)
� If a high is supplied to pin 2 of IC501.
(A Board)
� Has entered standby mode.
V-Stop 4 times
� +12V is not supplied. (A Board)
� IC561 is faulty. (A Board)
� Has entered standby state after
horizontal raster.
� Vertical deflection pulse is stopped.
� Power line is shorted or power
supply is stopped.
IK (AKB) 5 times
� Video OUT (IC561) is faulty. (A Board)
� IC702 is faulty. (C Board)
� Screen (G2) is improperly adjusted. **
� No raster is generated.
� CRT Cathode current detection
reference pulse output is small.
Zero Cross 9 times
� No zero cross pulses on pin 45
IC1001. (A Board)
� Power does not come on.
9V Check 10 times
� Relay failed (RY600) � Power does not come on.
* 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) Adjustments in Section 2-4 of this manual