- 92 -
LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
5.Trouble Shooting
(RF)
4.3 Checking TCXO Block
The output frequency (19.2MHz) of TCXO (X200) is used as the reference one of RTR6285 and PM7540
internal VCO
Schematic of the Crystal Part (19.2MHz)
100
R207
100p
C209
33
R210
1n
C212
TG-5010LH_19_2M_75A
X200
19.2MHz
3
2
4
1
VCONT
VCC
GND
OUT
10n
C213
1n
C214
VREG_TCXO_2.85V
VREG_MSMA_2.6V
C215
100p
0.1u
C216
100K
R213
0.1u
C219
NC7SV00P5X_NL
U202
3
2
4
1
5
VCC
GND
TCXO_RTR_19.2MHZ
TCXO_PM_19.2MHZ
RTR_TRK_LO_ADJ
TCXO_EN
USBH_SYSCLK
1.0T
TCXO Circuit
Clesed to TCXO
TP2
TP
TP1
5.Trouble Shooting
(RF)
4.3 Checking TCXO Block
The output frequency (19.2MHz) of TCXO (X200) is used as the reference one of RTR6285 and PM7540
internal VCO
Schematic of the Crystal Part (19.2MHz)
TP3
TP2
TP1
TP2
92P
Содержание GD88O
Страница 1: ...Service Manual Model GD880 Internal Use Only Service Manual GD880 Date March 2010 Issue 1 0 ...
Страница 183: ... 184 LGE Internal Use Only Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 199: ... 200 LGE Internal Use Only Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 217: ... 218 LGE Internal Use Only Copyright 2010 LG Electronics Inc All right reserved Only for training and service purposes ...