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Service manual
7.7
Failure location flow-charts.
7.7.1
Errors 1, 2 and 6.
ERROR_1
Switch on the TV set wit M key
pressed (inhibited protections)
Check the +8V at pins
12 and 37 of IC400
OK
Check the continuity of I2C but
path to pins 7 and 8 of IC400
OK
Change IC400
Check the path of
V_GUARD signal
ERROR_2
Check C656
Check the vertical
deflection path to IC701
Switch on the TV set with PL103 key
pressed (inhibited protections)
Increase G2 just to light the screen
YES
Does picture spread over
the whole screen?
* C425 damaged
*IC400 damaged
Possibly:
28
CHASSIS 2112-Series EC7-A
ERROR_6
Check +5VM at pin 8 of IC125
OK
Check the continuity of I2C bus
to the pins 5 and 6 of IC125
OK
Change IC125
NO
Check the ramp generator
(pin 51 of IC400)
Check +V_DRIVE and -VDRIVE
signals at pins 4 and 5 of IC701
Check -12 and +12 at pins 1 and 3 of IC701
Check C700 and D701
Change IC701
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