Philips HTS3181/55 Service Manual page 32

5
DECODE BOARD SCHEMATIC DIAGRAM 2/6
TUNER_ON
[2] TUNER_ON
TUNED
[2] TUNED
STERED
[2] STERED
I2C_CLK
[2] I2C_CLK
I2C_DAT
[2] I2C_DAT
R283
68K
C181 47P
R289 R290
10K 13K
TU_L
C182
1000P
R293
68K
C183 47P
R295 R296
10K 13K
TU_R
C190
1000P
5
4
EC131 R284
-12V
10u 8.2K
TUNE_L
U112A
2
R291
1
3 NC 15K
NJM4558
+12V
EC132 R294
-12V
10u 8.2K
TUNE_R
U112B
6
R297
7
5 NC 15K
NJM4558
+12V
4
3
TUNER_VCC
+9V
2 3
Q114
+ EC129 CB166 8550 + EC130
100U/16v
DV33
47U/16v 0.1u
R280
1K
R281
10K
R282 4.7K
Q115 TUNER_ON
1
2N3904
3
2
DV33
NC
R292
PORT_SEL
I2C_CLK L147 FB
I2C_DAT L148 FB
TUNED L149 FB
TU_L L150 FB
STERED L151 FB
TU_R L152 FB
TUNER_VCC L153 FB
C184 C185 C186 C187 C188
33P 33P 33P 33P 33P
2
1
D
TUNE_L
TUNE_L [5]
TUNE_R
TUNE_R [5]
+9V
+9V [1]
DV33
DV33 [1,2,3,5,7]
+12V
+12V [1,5,7]
-12V
-12V [1,5]
C
CN111
1
2
B
3
4
5
6
7
8
9
C189
10
33P
TUNER PORT KST-6A
A
1