- 156 -
LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
About 130mVp-p?
Change RF3300 (U111)
Check the pk-pk level at
PIN 1, PIN 2, PIN 3, PIN 4
With Oscilloscope.
Refer to Figure 4-36-1
Yes
No
Set the CW Mode of the Agillent 8960
Feed a CW signal at 1950MHz
Set the RX Continuous mode
Check the Mean level at
PIN 1, PIN 2, PIN 3, PIN 4
With Oscilloscope.
Refer to Figure 4-36-1
Yes
No
Check the frequency at
PIN 1, PIN 2, PIN 3, PIN 4
With Oscilloscope.
Refer to Figure 4-36-2
Yes
No
Verify whether the signal
was similar as Figure
4-36-2 with Oscilloscope.
Yes
No
About 160mV?
About 2MHz?
Similar?
Check Next Stage
Change RF3300 (U111)
Change RF3300 (U111)
Change RF3300 (U111)
TP Command
MODE=4
WRXC=9750
To Next Page
Loading...
