LG OM7560 Service Manual

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 (PN401 pin22)
about 190 mV?
Check MD (pick-up).
IM driving
(Focus and tracking) is ok?
Check Vcc of IC401.
Replace IC501.
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 IC501
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.

LG OM7560 Specifications

Power

power consumption networked standby	0.5 W
bus power supply (USB)	5 V 0 500 mA
amplifier output power	1, 000 W

Wireless Specifications

frequency range	2402 to 2480 MHz
output power	10 dBm
minimum distance from body	20 cm

Weight and Dimensions

dimensions	330 mm x 815 mm x 302 mm
net weight	16.8 kg