26
SX51LF7
SX51LF8
TROUBLE SHOOTING TABLE
NO RASTER
Blown out.
Replace the fuse.
Check IC701, D701 and
C707.
The fuse is again blown out.
Does horizontal circuit
oscillate ?
D1001 (Power LED Red)
turns on or turns ON/OFF.
Check T701 pin (7) voltage
(Approx. 310V at 220V AC)
Check F701.
Check Secondary Main+B
(Approx. 120V)
Check CRT connector K1-
K5 bias.
Check IC605, IC751 and
IC801.
Check
C878.
Check
IC801.
Checking the
protector circuit.
Check R615.
D1001 (Power LED red)
turns on and off.
See many often D1001
flashes in red.
This indicates which IC to
check up.
D1001 (Power LED Green)
turns on.
Check D758, IC702, IC753
and D762.
Check R701, R707 and
D709.
LIGHTS UP
TURN OFF
TV PROCESSORE
(IC801)
EEP ROM
(IC1003)
AV SWITCH
(IC401)
SOUND PRPCESSOR
(IC305)
(IGR/NICAM) DECODER
(IC2300)
TUNER
(TU201)
(Bus error)