Sanyo CE28FN1-E - Page 14

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