LG -MC2670 Service Manual page 16

LG-MC26 70
2.1.4 Checking Rx VCO Signal
Test Point
U106.16 (CP_RX)
Checking Flow
Check U106 Pin 18
Check if there is
Any Major Difference
◆ Refer to Graph 4-2
Check U106 Pin 16
Check if the voltage is
around 1.5V
Figure 2.1.4
Rx TEST SETUP(HHP)
- Test Channel : 384(DCN)
Spectrum Analyzer Setting
Oscilloscope Setting
Yes
UHF_LO OK?
No
No
CP_RX OK?
Yes
Replace U106
13
U106.18 (UHF_LO_OUT)
Rx VCO is Ok
See next Page
to check Control Signal
Check U105