Vfd/ Key/ Led Circuit Diagram - LG DM5620K Service Manual

7. VFD/ KEY/ LED CIRCUIT DIAGRAM

12
11
VF-
R301
C301
100k C300
47uF/50V
104
10
VFD
9
SW308
0
R314
47k
SW309
9
R309
8 33k
SW310
8
R310
18k
SW311
7
R311
7 8k2
SW312
6
R312
C302
5k6
47uF/16V
SW313
5
R313
6
3k3
SW314
4
R302
3k3
SW301
3
R303
5
2k2
SW302
2
R304
1k8
SW303
1
4 R305
1k2
SW304
ECHO VOL+
R306
1k2
SW305
ECHO VOL-
3
R307
1k
SW306
MIC VOL-
R308
1k2
SW307
MIC VOL+
2
3
KEY3
2
KEY2
1
DGND
1 KEY3 PCB
CN301
A B C D
VFD301
VFD33-1506FN
C311 R322
47uF/50V C312 100k
104
R367
4R7
VFD
GR09 SG17 26 SG02
40 GR7
GR08 25
SG16/KS16 SG03
41 GR8
24
GR07 SG15/KS15 SG04
42 GR9
23
GR06 43 GR10 SG14/KS14 SG05
IC300
22
GR05 44 GR11 PT6324 SG13/KS13 SG06
GR04 21 SG07
45 GR12 SG12/KS12
GR03 20 SG08
46 GR13 SG11/KS11
GR02 SG10/KS10 19 SG09
47 GR14
GR01 SG9/KS9 18 SG10
48 GR15
17
VFD SG8/KS8 SG11
49 GR16
16
SG7/KS7 SG12
50 VEE
15
51 VDD2 SG6/KS6 SG13
C304
VEE 14
104 52 GND2 SG5/KS5 SG14
C303 C305
104 SG15
104
R315
SG16
100k
SG17
SG18
L300
10uH
C309
104
C307
47uF/16V
R323
100R
C306 C308 C310
C313
100P 100P 100P
47uF/16V
CN300
1 FB301 OR
VF+
F+
2 FB302 0R
VF-
F-
FB70
3 FB303
VEE
-VKK
FB600
4 FB304
VFD-STB
FB600
5 FB305
VFD-DATA
FB600
6 FB306
VFD-CLK
7
GND
8 FB308 FB600
+5V6
9 FB309 FB600
REMOTE-INT
FB600
10 FB310
VOL+A
FB600
11 FB311
VOL-B
FB600
12 FB312 KEY1
KEY1
FB600
13 FB313 KEY3
KEY3
TP62 FB70
14 FB314
+12VA
15
DGND
16
VOL-LED7
17
VOL-LED6
18
VOL-LED5
19
VOL-LED4
20
VOL-LED3
21
VOL-LED2
22
VOL-LED1
23
VOL-LED8
24
KEY2
FB315
FB600
KEY2
E F G H
VF+
R365 SW324
SW317
NC
R366
4R7
DISC OP/CL DISC SKIP
R345
R328
1k8
1k8
SW325
SW318
TUNING+/SKIP/SEARCH TUNING-/SKIP/SEARCH
R346
R329
1k2 1k2
SW319 SW326
TUNER PRESET-
R347
R330
1k2
1k2
SW320 SW327
SET/CD II
AUX
R331 R348
1k 1k
SW321 SW328
STOP USB
R332 R349
1k2 1k2
SW322 SW329
PRESET+/PLAY CD/DVD
KEY1
KEY3
VR301
IR301
R324
B
A
39K
R334
10k
R335
C314
C315 10k
R333
104 100P 100R
C316 C317
R325
103 103
330K
R336 10k
R338 10k
10k
R339
R340 10k
R341 10k
10k
R342
R343 10k
R337 10k
I J K L M
3-33 3-34
R327
2k2 SW315
R
R344
R326
2k2
3k3 SW316
SW323
BASS BLAST/MP3 OPT AUTO DJ
R353
R360
3k3 SW330
3k3
SW334
ST./MONO
USER EQ
R352
R359
5k6 SW331
3k3
SW335
DEMO(TAPE/DEMO) LG EQ
R351
R358
8k2
SW332 5k6 SW336
TIMER EQ
R350
R357
18k
SW333
8k2 SW337
CLOCK POWER
KEY2 PCB
KEY1 PCB
R354
R355 R356 R361 R362 R363 R364
470R R300
470R 470R 470R 470R 470R 470R
470R
D308 D315 D309
D310 D316 D311 D312 D317 D313 D314 D318 D300
BLUE BLUE
NC
BLUE NC BLUE BLUE NC BLUE BLUE NC BLUE
Q302
3904
Q303
3904
Q304
3904
Q305
3904
Q306
3904
Q307
3904
Q308
3904
Q300
3904
N O P Q R
VFD/ KEY/ LED
2012. 03. 09
S T