CD FUNCTION
YES
Can the
disc insert?
NO
Is Motor_open/close
OK? (IC408 Pin6,7)
NO
Refer to function
check.
YES
Disc reading
is ok?
Is no signal at spk?
YES
Is Motor ok?
(about 12
)
Is load +,- ok?
YES
Check
the signal of
IC407 Pin52,53,54.
NO
YES
Check
the signal (16.0344 MHz)
at IC407
Pin51.
NO
YES
Check IC501
input/output and
control line.
NO
YES
YES
Check loading motor.
NO
IM driving (Focus and
tracking) is ok?
NO
Focus/
tracking/sled signal
is ok?
NO
Check IC408
(Motor drive IC).
NO
Is the MD(CN404
Pin22) about 190 mV?
YES
Check Vcc of IC407.
Check Cristal (X400).
NO
Replace Cristal
(X400).
Replace IC501.
Check IC408.
YES
1. CD FUNCTION
Check IM
(pick-up).
NO
3-27
CDP ELECTRICAL TROUBLESHOOTIHG GUIDE
Summary of Contents for CM4550
Page 13: ...2 2 ...
Page 17: ...A60 4 SPEAKER SECTION 4 1 FRONT SPEAKER CMS4550F ...
Page 18: ...2 9 A90 4 2 SUBWOOFER SPEAKER CMS4550W ...
Page 19: ...2 10 ...
Page 50: ...4 USB 13 USB_5 V D D 14 3 31 IC501 PIN A8 IC501 PIN A7 ...
Page 51: ...3 32 ...
Page 66: ...3 61 3 62 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 67: ...3 63 3 64 3 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...