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8 JUMPER SWITCH SETTINGS
24
EPSON
S5U1C17801T1100 HARDWARE MANUAL
(SOFTWARE EVALUATION TOOL FOR S1C17801)
Setting for JP3
JP3 wiring, allowing for three functions, is shown in the following.
∗ 1-2 Shorted
Power is supplied to LCD backlight. Shorting 3-4 is not allowed while 1-2 is shorted.
∗ 3-4 Shorted
Power with phase generated by.MFT0 on the S1C17801 is supplied to LCD backlight. It can be used to adjust the
brightness of LCD backlight. Shorting 1-2 is not allowed while 2-3 is shorted. For details, see Chapter 15 LED/
LCD BACKLIGHT CONTROL CIRCUIT WITH MFT0.
∗ 5-6 Shorted
Power with phase generated by MFT0 is supplied to LED3. It can be used to adjust the brightness of LED3. Ei-
ther 1-2 or 2-3 can be shorted while 5-6 is shorted. For details, see Chapter 15 LED/LCD BACKLIGHT CON-
TROL CIRCUIT WITH MFT0.
Factory default setting for JP3 is 1-2 and 5-6 shorted.
DIC-152-6P
1
1
5
3
5
3
2
6
4
2
4
G V
VDD
VLSS (LCD module)
VDD
JP3
JP3
MFT0
U20
TS5A3166
R90
470
LED3
LT
W-170TK
C65
0.1µF
LCD_BL_ON
LCD_BL_PWM
D201_PWM
Fig. 8.3.1 JP3 Related Circuit