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3-31
ELECTRICAL TROUBLESHOOTING GUIDE
8. CD FUNCTION CHECK
CD FUNCTION
Is motor_open/close ok?
(IC400 pin6, 7)
Replace cristal (X400).
Check loading motor.
Check IC400.
Check IC400 (Motor drive IC).
Is the MD (CN401 pin22)
about 190 mV?
Check MD (pick-up).
IM driving
(Focus and tracking) is ok?
Check Vcc of IC401.
Replace IC500.
Check cristal (X400).
Is motor ok? (about 12
Ω
)
Is no signal at speaker?
Can the
disc insert?
Disc reading
is ok?
Check
the signal of IC401.
Check IC500
input/output and
control line.
Check
the signal (16.9344 MHz)
at IC401 pin49.
Focus,
tracking, sled signal
is ok?
Is load +,- ok?
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
NO
Refer to function check.
Содержание CM5660
Страница 13: ...2 2 ...
Страница 15: ......
Страница 17: ...2 8 A60 3 SPEAKER SECTION ...
Страница 51: ...3 34 2 SDRAM IC504 Fig 2 SDRAM 7 6 8 5 8 6 7 5 ...
Страница 52: ...3 35 3 SERVO IC401 X XI XO Fig 3 2 CD 16M IC401 pin31 Fig 3 1 X400 Crystal 16 9344 MHz 10 9 11 10 9 11 ...
Страница 61: ...3 65 3 66 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 62: ...3 67 3 68 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...
Страница 63: ...3 69 3 70 4 JACK P C BOARD TOP VIEW BOTTOM VIEW ...