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5
GE-1A SELF DIAGNOSTIC SOFTWARE
The identification of errors within the GE-1A chassis is triggered in one of two ways :- 1: Busy or 2: Device failure to respond to IIC. In the event
of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with continuous flashing LED) and
then communicate with each device in turn to establish if a device is faulty. If a device is found to be faulty the relevant device number will be dis-
played through the LED (Series of flashes which must be counted) See table 1., non fatal errors are reported using this method.
of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with continuous flashing LED) and
then communicate with each device in turn to establish if a device is faulty. If a device is found to be faulty the relevant device number will be dis-
played through the LED (Series of flashes which must be counted) See table 1., non fatal errors are reported using this method.
ERROR
LED
ERROR
COUNT
COUNT
No error
00
Not allowed (may be confused with Sircs response
flash!)
flash!)
01
Over Current Protection
02
Over Voltage Protection
03
Vertical Protection
04
No function
05
H - Protection
06
Speaker Protection
07
MEGATEXT
08
NVM
09
Main colour decoder
10
Feature Box 1
11
D/A converter
12
Multi Component processor
13
Multi sound processor
14
DMUX
15
Feature Box 2
16
StBy LED
ON
ON
ON
OFF
OFF
Flash Timing Example : e.g. error number 3
Diagnostic Item
Description
No of times Standby
LED Flashes
Probable cause
Location
Detected Symptoms
Power does not turn on
Does not light
Power cord is not plugged in
Fuse is burned out
Fuse is burned out
Power does not come on
No power is supplied to the TV
AC power supply is faulty
No power is supplied to the TV
AC power supply is faulty
+B Overvoltage(OVP)
2 times
H.OUT (Q502) is shorted. (D Board)
IC603 Power IC is shorted. (D Board)
IC603 Power IC is shorted. (D Board)
Power does not come on
Load on power line has shorted
Load on power line has shorted
Vertical Deflection stopped
4 times
+15V is not supplied R519 open (D Board)
-15V is not supplied R518 open (D Board)
IC502 is shorted (D Board)
-15V is not supplied R518 open (D Board)
IC502 is shorted (D Board)
Vertical deflection pulse has stopped
Power line has shorted
Power line has shorted
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