3-14
ELECTRICAL TROUBLESHOOTING GUIDE
11. CD FUNCTION CHECK
CD function
Is MOT_open/close OK?
(IC402 Pin4, 5)
Check IC401.
(Motor drive IC)
OPU driving
(Focusing & Tracking) is OK?
Check VCC of IC400.
Replace crystal (IC500).
Check crystal (X400).
Replace crystal (X400).
Is the PD(CN402 Pin2)
about 180 mV?
Is motor impedance OK?
(About 12
Ω
)
Is no signal at SPK?
Check IC402.
Check OPU.
(Pick-up module)
Check loading motor.
Can the DISC insert?
DISC reading is OK?
Can’t see the
signal at Pin34, 35, 36
of IC400?
Check IC500
Input/Output and
control line
Can’t see the
signal(16.9344 MHz) at Pin31
of IC400.
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Is LOAD+/- OK ?
Focusing/Tracking
/Sled signal is OK?
YES
YES
YES
YES
YES
YES
YES
YES
NO
YES
Refer to function check.
Summary of Contents for CM2630B
Page 19: ...2 8 A60L A60R 4 SPEAKER SECTION ...
Page 39: ...3 20 5 USB Figure 5 1 USB D D IC501 Pin117 118 D D 26 25 25 26 ...
Page 40: ...3 21 6 CRYSTAL Figure 6 1 12 MHZ CRYSTAL IC101 Pin57 58 XI XO 27 28 27 28 ...
Page 41: ...3 22 MEMO ...
Page 57: ...3 53 3 54 2 MAIN P C BOARD TOP VIEW ...
Page 58: ...3 55 3 56 MAIN P C BOARD BOTTOM VIEW ...
Page 59: ...3 57 3 58 3 VFD TOUCH TOP JACK P C BOARD TOP VIEW ...
Page 60: ...3 59 3 60 VFD TOUCH TOP JACK P C BOARD BOTTOM VIEW ...
Page 61: ...3 61 3 62 MEMO MEMO ...
