Sanyo CE14A2-C Service Manual page 44

Service manual
7.7.2 Error 3.
Picture appears with
flyback lines
*Check +B3 at CRT socket.
*A possible short-circuit in Q501,
Q502 or Q503
*Cathode possibly short-circuit to ground
Check +B1 at
pin 7 of T650
Check the continuity
of horizontal deflection coil
until the circuit
OK
Check the horizontal
deflection path
OK
Possibly:
*X400 damaged
*Failure of T650
ERROR_3
Does it just happen after
No
switching on?
Yes
Switch on the TV set with M key
pressed (inhibited protections)
Does it sound line
stage abnormal?
No
Is there picture ?
No
There are pulses
Check collector
but they have
of Q600
a low level
The pulses are OK
Possible short-circuit
of heaters
* Possible faulty of T650
* Possible short-circuit on
Yes
secondaries of T650
* Check the supply of the driver circuit
Possible faulty in the protection circuits
(D562, D561, D504, D505)
Check that the voltage at -DEFL_FAIL is 5V.
Possibly:
Leakage in C402 or C403
(Bandgap capacitance)
There are not pulses
Possibly:
*Primary T600 open
* +12 does not reach to T600
*Q600 damaged
*Generator circuit of
de H_FLY&SYNC
29
CHASSIS 2112-Series EC7-A
OK
Check the patch from pin 40 of
IC400 to Q600 base
OK Bad
Possibly:
*X400 damaged
*Failure of IC400
*+8V does not reach to Q601
*R418 open