LG U370 Service Manual page 59

3. TECHNICAL BRIEF
3.10.6 Keypad Light
There are 8 Blue LEDs in Main key backlight circuit, which are driven by KYDB_BACKLIGHT line from
PM6650.
REV_B : EDLH0013501 --> EDLH0006001
KYBD_BACKLIGHT
Figure. Schematic of KEY back light circuit ( KEY side )
3.10.7 LCD Module (NM200CM2 : Tovis)
- The NM200CM2 module has Main LCD and Sub LCD.
Main LCD has a 2.0 inch diagonally measured active display area with 176(RGB)X220 resolution.
each pixel is divided into Red, Green and Blue sub-pixels and dots which are arranged in vertical
stripes.
Sub LCD has a 0.98 inch diagonally measured active display area with 96(mono)X64 resolution.
* Features
- Display mode(Main LCD) : Normally White, Transmissive TFT 265K colors.
(Sub LCD) : Normally Black, Transmissive Mono STN.
- 16 bit CPU interface Parallel
LGE Internal Use Only
KEY_BACK_LIGHT LED(10EA)
+VPWR
LD400 LEBB-S14H LD401 LEBB-S14H
R417
100ohm
LD403 LEBB-S14H LD404 LEBB-S14H
R420
100ohm
LD406 LEBB-S14H LD407 LEBB-S14H
R423
100ohm
LD409 LEBB-S14H
R426
100ohm
LD402 LEBB-S14H
R418 R419 100ohm
100ohm
LD405 LEBB-S14H
R421
100ohm R422 100ohm
LEBB-S14H
LD408
R424
100ohm R425 100ohm
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Only for training and service purposes