LG KG280 Service Manual - Page 19
MHz Clock VCTCXO, X600
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3. TECHNICAL BRIEF 3.4 26 MHz Clock (VCTCXO, X600) The 26 MHz clock(X600) consists of a TCXO(Temperature Compensated Crystal Oscillator) which oscillates at a frequency of 26 MHz. It is used within the AD6549(U601), base band processor(AD6720,U101), Midi(U204, YMU792) , BT Module(U702) 2V75_VVCXO X600 AFC R622 1 VCONT OUT 3 15K C647 2 GND VCC 4 1000p 26MHz C648 TG-5010LH-26M 2.2u EXSK0008101 Figure 3-3. VCTCXO CIRCUIT DIAGRAM LGE Internal Use Only - 20 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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3. TECHNICAL BRIEF
3.4 26 MHz Clock (VCTCXO, X600)
The 26 MHz clock(X600) consists of a TCXO(Temperature Compensated Crystal Oscillator) which
oscillates at a frequency of 26 MHz. It is used within the AD6549(U601), base band
processor(AD6720,U101), Midi(U204, YMU792) , BT Module(U702)
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
2.2u
C648
C647
1000p
2V75_VVCXO
2
GND
3
OUT
VCC
4
VCONT
1
26MHz
TG-5010LH-26M
EXSK0008101
X600
R622
15K
AFC
Figure 3-3. VCTCXO CIRCUIT DIAGRAM