LG -MC2670 Service Manual page 50

Cdma portable cellular phone
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LG-MC2670
Checking Flow : LCD
START
Check L301, L404 Voltage
(MSMP)= 2.8V ?
Yes
Check the
CON304 Soldering
Yes
Does LCD work properly?
Check voltages at each
point of Capacitor.
Yes
Check the
Control signal
D[0:7], LCD_RESET/,
LCD_RS/, LCD_CS/,
LWR/
Yes
LCD display will
work properly
No
Re-Soldering L301, L404
No
Re-Soldering CON304
10.4V
1.38V
0.97V
1.38V
1.93V
6.71V
7.69V
8.65V
No
Change the LCD Module
No
Does VR1,VR2, R340
Work Properly?
Yes
Change the Main Board
47
2.78V
4.07V
9.19V
1.38V 6.65V
No
Re-soldering or Replace
VR1,VR2, R340

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