Sanyo CE28FN1-E Service Manual page 14

Are retrace lines visible ?
*Check +B3 at IC500
*R506 posibly fused
*IC500 posibly damaged
Check +B1 in The pulses level
pin 2 of T650
OK
Check D663 and the
path of +B10
OK
Check the path of the
horizontal deflector
yoke to the circuit
OK
Check the horizontal
deflection path
OK
Probably:
*X400 damaged
*T650 failure
ERROR_3
Does it happen quickly
No
after switch on?
Yes
Switch on the TV set with PL100
pushed (protect mode disabled)
Does it sound line
stage abnormal?
No
Is there picture ?
No
Check TO585
(Collector of Q600)
is low
The pulses are OK
Possible
heater shortcircuit
Connect the D660
anode to ground
Is there horizontal
Yes
drive?
There is an H_FLY
generator circuit
failure. There is an
abnormal positive polarization
of H_FLY or H_SYNC signals
* Possible failure of T650
* Possible shortcircuit in
Yes
secondary of T650
* Check B10
Is the E/W
Yes Yes
correction OK?
No
Check the path from the
E/W output to the diode modulator
OK
With the TV set switched off
and the tester in ohms, does
it measure shortcircuit between
pins 11 and 7 of IC701?
No
There are not pulses
No
Probably:
*X400 damaged
*IC400 failure
*There is not +8V at R418
*R418 opened
13
Service Manual MS CE25FN1-E
Possible failure in protect circuits
(Q750, Q751, Q653, Q651, Q652)
Check that the voltage level
in -PD&FAIL is 5V.
OK
Probably:
Leakage in C402 or C403
(Bandgap capacitance)
Probably:
* IC701failure
Yes
* D750 failure
Check the E/W signal
from the IC400 output
to the IC701 input
Check R701
NG
OK
Check +B5 in
D600 cathode
OK
Check TO270
NG
(H_OUT)
OK
Check the Q600
signal at the base
OK
Probably:
*Primary T600 opened
*There is not B11 at T600
*Q600 damaged
Probably IC701
is damaged