Acer AT1921 Service Manual page 58

5
MTK ADC 0V~2.8V
SB33B
R275
6.8k/6
D
R277 R278
4 ADC_IN1
510R/6 1k/6
C193
CB92
0.1uF/6
0.1uF/6/NC
C
R283
10k/6
R285
0R/6
4 ERO1_UP3_1
4 FCLK_GPIO
R286
0R/6
B
5VSB 5VSB 5VSB
D51 D52 D53
BAV99L/NC BAV99L/NC BAV99L
LED_R LED_G
3 3
C248 C249
A
NC/10pF NC/10pF NC/10pF
5
4
R279 R280 R281
2k/6 3k/6 6k/6
C192 C191 C190 C188
0.1uF/6/NC 0.1uF/6/NC 0.1uF/6/NC 0.1uF/6/NC
SB33B DV33A
R334
10k/6
Q23
2N3906 Q24
2
2N3906
2
R289
R288 100R/6
330R/6
LED_G
LED_R
5VSB 5VSB 5VSB
D54 D55 D56
BAV99L/NC BAV99L/NC BAV99L/NC
VO- VO+ CH+
3 3 3 3
C250 C251 C252 C253
NC/10pF NC/10pF NC/10pF
4
3
SB33B
VO- 0.22V
VO+ 0.58V
CH+ 1.1V
CH- 1.59V R276
MENU
2.2V 10k/6
SOURCE 2.49V
R282
C186
20pF/6
9.1k/6
C187
0.1uF/6/NC LED_R L66 FB/6
LED_G L67 FB/6
VO- L68 FB/6
VO+ L69 FB/6
CH+ L70 FB/6
CH- L71 FB/6
PW_KEY L72 FB/6
SOURCE L73 FB/6
MENU L74 FB/6
5VSB
L61
Bead_121_4A/8
LED_G L62 Bead_121_4A/8
LED_R L63 Bead_121_4A/8
R413 1AFUSE/6
L60 Bead_121_4A/8
4,7 IR
C194
20pF/6
5VSB 5VSB 5VSB
D57 D58 D59
BAV99L BAV99L/NC BAV99L/NC
CH- PW_KEY SOURCE MENU
3 3 3
C254 C255 C256
0.1upF/6 NC/10pF NC/10pF
3
2
PW_KEY 4,7
R391
47K/6/NC
J1
1
2
3
4
5
6
7
8
9
10
HEADER 10pin (2mm)
C234
0.1uF/6
CN4
5
4
3
2
1
4501-04-05P-R
5VSB
D60
BAV99L/NC
I R
3
C257
NC/10pF
Title
Size Document Number
Custom <Doc>
Date: Tuesday, May 29, 2007
2
1
PROJECT :E9T-PV
ADC KEYPAD & IR
R e v
C3B
Sheet 14 o f 14
1
D
C
B
A