SELF DIAGNOSIS
- The Self-Diagnostic circuit is a program of the Main uCom IC on the A board. This program monitors seven general faults that result in one or more of the following:
- TV shutdown (AC relay is turned off); TV Latched OFF, (AC relay is held off); or A dark picture (no RGB signal).
As an indication of failure, the Main uCom blinks the Standby LED a number of times, pauses, then repeat.
OSD DIAGNOSTICS
- In addition to the blinking Standby LED, the Main uCom records the number of times the failure occurred. This is useful when the user complains of an intermittent shutdown.
ACCESS DIAGNOSTIC MODE
- To enter the test screen, first press these remote control buttons one at a time: Display, 5, Vol ( — ), Power On.
- The screen will list the circuit monitored and the number of times the failure has occurred.
Clear the OSD Diagnostic numbers
- To clear the number of failures from the test screen Press 8, Enter.
STANDBY LED BLINKING CODES AND TEST POINTS
Stby LED blinks
|
Symptom
|
bd
|
Monitored circuit
|
Test point
|
Normal voltage
|
0x
|
Shutdown
|
D
|
+200V OCP [HV]
|
Q8009/C
|
0.1Vdc
|
2x
|
Shutdown
|
D
|
+135V OCP
|
CN6506/pin-8
|
0V
|
3x
|
Shutdown
|
A
|
Unreg 7v OVP
|
D6017/C
|
0v
|
3x
|
Shutdown
|
D
|
+135v OVP
|
CN6506/pin-7
|
0.1v
|
4x
|
Shutdown
|
D
|
V-out loss
|
CN5505/pin-7
|
0.78v
|
5x
|
Blanking
|
C/A/G2 adj
|
IK balance
|
CN202/pin-8
|
3 pulses in vertical interval
|
6x
|
Shutdown
|
A
|
Set 5v OCP
|
IC6007/output
|
5.0vdc
|
7x
|
Shutdown
|
D
|
H out OCP
|
CN5505/pin-8
|
0v
|
