LG OM7560 Service Manual

3-6
ONE POINT REPAIR GUIDE
4. 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.
4-1. NO DVCC_3.3V, 1.2 VA
4-1-1. Solution
Please check and replace IC202, IC205 on MAIN board.
4-1-2. How to troubleshoot (Countermeasure)
1) Check Voltage of IC202 pin3 on MAIN board.
 If IC202 pin3 (about 5.1 V) & pin1 Input 12 VA doesn’t come out, check +12 VA from SMPS board.
2) If IC202 pin3 (about 5.1 V) is normal, check voltage of IC205 pin3 (about 1.2 VA), pin6 (about 3.3 VA).
If IC205 pin3 (about 1.2 VA), pin6 (about 3.3 VA) doesn’t come out, check R253, R254, R256 and R260, R261, R262.
If there’s no defective component then replace IC205.
3) PWR_CTRL is high, check R512 and if there’s no defective component then replace IC505.
PWR_CTRL (IC505 pin3) is high (about 3.2 V)
 If PWR_CTRL isn’t high, check pin D11 of IC501 & R512, R513
4) If PWR_CTRL is high, check R559 and if there’s no defective component then replace IC505.
4-1-3. Service hint (Any picture/ Remark)
< MAIN board top view >
< MAIN board bottom view >
IC505
IC505
IC202
IC202
IC205
IC205

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