LG KU580 Service Manual - Page 124
Check 1. Crystal and RF3000GSM Transceiver part
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4. TROUBLE SHOOTING Check 1. Crystal and RF3000(GSM Transceiver) part If you already check this crystal part, you can skip check 1 R211 11 WB 12 GN 13 XO 14 XO 15 GN 16 MC 17 Figure 4-14-1. Test Point (Crystal Part) MCLKREQ RF_CTRL_CLK X200 4 3 1 2 26MHz KSX-23-26000KFA-QA0R R207 100K WCLK R208 100K R211 MCLK MCLK R211 120K Figure 4-14-2. Schematic (Crystal Part) Figure 4-15. 26MHz at R211 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 125 - LGE Internal Use Only
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- 125 -
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Check 1. Crystal and RF3000(GSM Transceiver) part
If you already check this crystal part, you can skip check 1
Figure 4-14-1. Test Point (Crystal Part)
R211
Figure 4-14-2. Schematic (Crystal Part)
Figure 4-15. 26MHz at R211
11
WB
XO
13
14
XO
17
MC
16
12
GN
15
GN
26MHz
X200
KSX-23-26000KFA-QA0R
1
2
3
4
120K
R211
100K
R207
100K
R208
RF_CTRL_CLK
MCLKREQ
MCLK
WCLK
R211
MCLK