Sharp CX68KF5 Service Manual page 17

TROUBLE SHOOTING TABLE
E 2 PROM
(IC1001)
Bus-Err
500 500 2000
V/C/D
(IC800)
Bus-Err
500 500
Tuner
(TU200)
Bus-Err
500 500
S-CONTROL
(IC1300)
Bus-Err
500 500
Bus-Err
AV-SWITCH
(IC400) 500 500
Bus-Err
Other
500 500
A
TEXT
Bus-Err
(IC1800)
500 500
NICAM/IGR
Bus-Err
(IC2300)
500 500
(Continued)
(ms)
2000 (ms)
2000 (ms)
2000 (ms)
2000
2000
2000
2000
17-1
TROUBLE SHOOTING TABLE
(ms)
(ms)
Does 5V appear at pin (22) of IC1000?
No
Check the
peripheral circuit
(ms)
of IC1700,
IC1002, IC1701
and D1751.
(ms)
(Continued)
NO LED LIGHT
Check F3700. Check F3700.
Normal Blown out
Replace the Fuse.
No
Is the Fuse again blown out?
Yes
Check the power circuit
consisting of T700, IC700,
Q700 and peripheral parts.
Yes
Check IC1000,
IC1002, Q1002,
Q752 and
Q753.
17-2