BBK LT1914S Service Manual page 30

5
SCART
SCART1_IN_L
1 SCART1_IN_L
SCART1_IN_R
1 SCART1_IN_R
R189 R189
C190 C190
0.01uF 0.01uF
100K 100K
HDTV（国内机）/VGA/AV/S端子 Audio
D
SCART2_IN_L R196 R196
1 SCART2_IN_L
SCART2_IN_R R197 R197
1 SCART2_IN_R
6 TV_A_IN
C200 C200 C201 C201
TV Audio
R200 R200
0.01uF 0.01uF
0.01uF 0.01uF
100K 100K
10uF/16V 10uF/16V
GND
34XX使用说明： C215 C215 C216 C216
1、使用34X0 时：
470nF 470nF 0.01uF 0.01uF
R238-NC、R239-NC C214 C214
2、使用34X5 时： 100uF/16V 100uF/16V
C225-NC、R232-NC、237-NC
C219-NC、R253-NC
+5VSAFE
L12 L12
10uH 10uH
C218 47pF C218 47pF
6 TV_SIF
C220 C220
47pF 47pF
R206 R206 1M_DNS 1M_DNS
X4 X4
18.432MHz 18.432MHz
47pF 47pF
+5VSAFE
C225 C225
C233 C233
3.3pF 3.3pF
C
R212 R212 +5VSAFE
GND
470R 470R
GND
R216 R216
V22 V22 R215 R215
2N7002 2N7002 10K 10K 10K 10K
1 3
M_SCL
R217 R217
V23 V23 R219 R219
2N7002 2N7002
M_SDA
1 3
C241 C241 C242 C242
22pF 22pF 22pF 22pF
+5VSAFE
L13 L13
10uH 10uH
GND GND C243 C243
220pF 220pF
GND
B
M_SDA
2,3,6 M_SDA
M_SCL
2,3,6 M_SCL
CHANGE:
DEL N22（4334）相关电路
具体删除了：
N22 C258 C259 R223 R224
R225 R227 C255 C262 C267
C268 FB15 R220 R259 R260
A
5
4
说明：
1、使用X0系列时：
AR3、AL3连接读卡器，AR4、AL4连接高清音频输入
C186 C186
R185 R185 1K 1K AL1
2、使用X5系列时:
470nF 470nF
AR3 AR3、AL3悬空，AR4、AL4悬空，所有音频输入走
R188 R188 1K 1K
C189 C189 AR1
SCART2_IN_X
470nF 470nF AL3
C191 C191
R190 R190
470nF 470nF
AR4 C192 C192 R191 R191
0.01uF 0.01uF
100K 100K
470nF 470nF
AL4 C194 C194 R193 R193
GND
C198 C198
1K 1K AL2
470nF 470nF
C199 C199
1K 1K AR2
R253 R253
0R 0R
470nF 470nF ADD
R198 R198 1K 1K
GND
C323 C323
C202 C202
470PF 470PF
C209 C209
470nF 470nF
0.1uF 0.1uF
GND C210 C210 C206 C206
0.1uF 0.1uF
C208 C208
470pF 470pF
+ + + +
GND
N19 N19
65 40
AVSUP CAPL_M
66 39
AVSUP AHVSUP
67 38
ANA_IN1+ CAPL_A
68 37
ANA_IN- SC1_OUT_L
69 36
ANA_IN2+ SC1_OUT_R
70 35
TESTEN VREF1
71 34
XTAL_IN SC2_OUT_L
72 33
XTAL_OUT SC2_OUT_R
73 32
TP NC
74 MSP34XX MSP34XX 31
AUD_CL_OUT NC
C234 C234
75 30
NC DACA_SUB
3.3pF 3.3pF 76 29
NC NC
77 28
D_CTR_I/O_1 DACM_L
78 27
D_CTR_I/O_0 DACM_R
79 26
ADR_SEL VREF2
80 25
STANDBYQ DACA_L
SCL
22R 22R
22R 22R SDA
GND
C247 C247
100pF 100pF R222 R222
100R 100R /SOFTRST
GND
C244 C244 C245 C245
C246 C246
+ +
10uF/16V 10uF/16V
470pF 470pF 1500pF 1500pF
+5VSAFE
NC
R280 R280 47K 47K C_R/C_R
R282 R282 47K 47K C_R/C_L
CHANGE DEL R294 R296 R275 R276
R278 R279
4
3
ADD
+5VSAFE
1K 1K SCART3_IN_R
SCART3_IN_R 1
1K 1K SCART3_IN_L
SCART3_IN_L 1
C195 C195 C196 C196 R194 R194 R195 R195
10nF 10nF 100K 100K 100K 100K
10nF 10nF
C221 C221
1uF 1uF
GND GND GND R202 R202 22K 22K
+8V/9V
R205 R205 22K 22K
C223 1uF C223 1uF R210 R210
C207 C207 + + C203 C203
100uF/16V 100uF/16V C228 C228
0.01uF 0.01uF 4.7nF 4.7nF
47K 47K
GND
C217 C217
10uF/16V 10uF/16V
C239 C239
C219 C219 100R 100R 10uF/16V_DNS 10uF/16V_DNS
10uF/16V 10uF/16V OUT1_L R218 R218
OUT1_R
R221 R221 C240 C240
LinP_P LinP_P 100R 100R 10uF/16V_DNS 10uF/16V_DNS
NET HAVE CHANG RinP_P
LinP R238 0R R238 0R ADD
RinP R239 0R R239 0R
C237 C237 C238 C238
0.01uF 0.01uF 0.01uF 0.01uF
关机爆音
GND C266－NC
R232 0R R232 0R
VD43－NC
R237 0R R237 0R
R228=10K
R233=8.2k R250=8.2K
C269-NC
C260=47uF
/SOFTRST 2,3
R231 R231 10K 10K
2
3 MUTE
CHANG 8.29
AR3 R308 R308 0R 0R C_R/C_R
AL3 R309 R309 0R 0R C_R/C_L
NC
SCART2_IN_R R295 R295 0R 0R C_R/C_R
SCART2_IN_L R293 R293 0R 0R C_R/C_L
SIDE
PHONE
XP9 XP9
R281 R281 47K 47K
P_MUTE
1
R283 R283 47K 47K 2
RinP_H
3
LinP_H
4
CON4 CON4 GND
3
2
+12V_A
R351 R351
C330 C330 N31 N31 0R 0R DL4001MSCT DL4001MSCT
0.1uF 0.1uF
1 8
BS SYNC
L5 L5 2 7 R352 R352 C332 C332
IN EN
2K7 2K7 22uF/25V 22uF/25V
3 6
SW COMP
SBD65 SBD65 4 5 C331 C331
GND FB
VD10 VD10 NC NC
RB051L-40 RB051L-40 MP1580 MP1580
C333 C333
10 nF 10 nF
R353 R353 10K 10K VD41 VD41
GND
R354 R354 33K 33K GND DL4001MSCT DL4001MSCT
+5VSAFE
GND
N20 TDA2822M N20 TDA2822M
5 4 C222 100uF/16V C222 100uF/16V
IN2- GND
6 3
IN2+ OUT2
C224 C224
7 2
IN1+ VCC
C226 C226 100uF/16V 100uF/16V
8 1
IN1- OUT1
R211 R211 C235 C235
+ + + +
C227 C227 R204 R204
100uF/16V 100uF/16V DIP8\TDA2822 DIP8\TDA2822 + +
100uF/16V 100uF/16V C236 C236 R207 R207
4.7nF 4.7nF
47K 47K R213 R213 47uF/16V 47uF/16V
470R 470R R214 R214 C229 C229 R209 R209 C230 C230
470R 470R R208 R208
GND 100K 100K 0.1uF 0.1uF 100K 100K 0.1uF 0.1uF
GND
GND
SCART1_OUT_L +12V_A
SCART1_OUT_L 1
SCART1_OUT_R FB14 BEAD FB14 BEAD
SCART1_OUT_R 1
C249 C249
C252 C252 C248 C248
C321 0.01uF C321 0.01uF 0.1uF 0.1uF 470uF/16V 470uF/16V
47uF/16V 47uF/16V
C322 0.01uF C322 0.01uF
N21 N21
GND GND
LinP R329 R329 3K3 3K3 C253 C253 330nF 330nF
RinP R330 R330 3K3 3K3 C256 C256 330nF 330nF
1
IN1
VD42 BAV70 VD42 BAV70 +12V_A
1 9
IN2
3
C260 C260
2
100uF/16V 100uF/16V
R226 R226
8
M/SS
V24 V24 VD43 VD43 1N4148 1N4148 10K 10K
2
+12V_A 2N3906 2N3906
GND R228 R228 100K 100K
C266 C266
R229 R229 1uF 1uF
47K 47K V25 V25
2
2N3904 2N3904
GND C269 C269
R230 R230 2.7K 2.7K
VD44 VD44 10uF/16V 10uF/16V
1N4148 1N4148 R233 R233
V26 V26 10K 10K
2N3904 2N3904 GND
GND
3 Audio_STB
GND
+12V_A
C_R/C_R C295 C295 470nF 470nF R/C_RIN
C_R/C_L C296 C296 R/C_LIN
470nF 470nF
CHANGE:
DEL N25（CD4052）相关电路
具体删除了：
N25 C287 C289 C306 R285
R286 C288 C293
Title Title Title
Size Size Size
C C C
Date: Date: Date:
2
1
+12V_A +8V/9V
V21 V21
2N3904 2N3904
VD39 VD39 L11 L11 10uH 10uH 8V/24mA
C193 C193 R192 R192
10K 10K
47uF/16V 47uF/16V
VD40 VD40 C197 C197
8.7V 8.7V
GND 47uF/16V 47uF/16V
GND GND +5VSAFE
N18 78M05_1 N18 78M05_1
D
5V/254mA
1 3
IN OUT
C204 C204 C205 C205
47uF/16V 47uF/16V 47uF/16V 47uF/16V
GND
680R 680R LinP_H
680R 680R RinP_H
C231 C231 +12V +12V
C232 C232
1nF 1nF
1nF 1nF
R339 R339 R340 R340
240K 240K 240K 240K
R341 R341 1K2 1K2 L_OUT R342 R342 1K2 1K2 R_OUT
GND
R343 R343 R344 R344
5K6 5K6 5K6 5K6
ADD
GND GND
C250 C250 C251 C251
0.1uF 0.1uF 0.1uF 0.1uF
C270 C270
GND
NC NC
TDA1517(DIP20P) TDA1517(DIP20P) GND
R234 R234
C
NC NC
470uF/16V 470uF/16V XP10 XP10
4
OUT1
L_OUT C254 C254
1
2
470uF/16V 470uF/16V
3
R_OUT C257 C257
6
OUT2 4
DF3A-4P-2DS DF3A-4P-2DS
GND
R235 R235
3
SVRR
NC NC
C261 C261
100uF/16V 100uF/16V ADD C271 C271
NC NC
R331 R331 GND
GND 22R 22R
P_MUTE
R250 R250 10K 10K
R314 10K R314 10K
Audio_STB V29 V29
2
2N3904 2N3904
C324 C324 R332 R332 10K 10K
47uF/16V 47uF/16V
GND
R333 R333
B
100K 100K
NC
GND
XP19 XP19
NC
R/C_LIN
1
2
3 R/C_RIN
4
CON4 CON4
GND
A
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Friday, January 26, 2007 Friday, January 26, 2007 Friday, January 26, 2007 Sheet Sheet Sheet 5 5 5 of of of 6 6 6
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