LG OM7560 Service Manual

3-7
ONE POINT REPAIR GUIDE
NO BOOTING (IN CD/USB FUNCTION)
After you turn on power key and displayed message in the following order (HELLO  VOL XX 
CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally.
4-2. CRYSTAL (X500)
4-2-1. Solution
Replace X500 on MAIN board.
4-2-2. How to troubleshoot (Countermeasure)
1) If 3.3 VA & 1.2 VA is normal, check reset ‘High’ of IC501 pin T12 on MAIN board.
 If MAIN_RESET isn’t high, check MICOM (IC101) pin40.
2) If MAIN_RESET is high, check the soldering status of 24 MHz crystal (X500).
3) If the crystal (X500) doesn’t oscillate, check R508, C502, C503 around crystal (X500).
 If there’s no defective component, then replace X500.
4-2-3. Service hint (Any picture/ Remark)
X
XI
XO
X500
< Signal waveform >
< MAIN board top view >
IC501
IC501
X500
X500

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