Sharp MD-MX30 Service Manual page 48

MD-MX30/MX30W
A
TUNER PWB-A3
R370
1K
B
R364
FM IF DET/FM
MPX/AM IF
R363
R362 R361
C372
13
C373
1/50
1.3V
14
C374
1.3V
15
R356
R357
470K 1K
2.1V
C
16
C368
0V
1/50
c2.3Vd
17
X351
456kHz
C367
R350
1/50
2.7K
2.6V
(0.9V)
C366 0.001
18
C365
0.022
0V
19
(1.9V)
C364
10/16
C363
0.022
(1.2V)c0.9Vd 0.6V
D
20
2.2V
21
C361 2.2V
22
0.022
C362
3.3/50
C343
5.1V
23
33P
3.6V
24
R358
8.2K
C342
0.022
E
C331
0.047
0V 0V
C330
VD301
MD-MX30W:
SVC348S
15P(UJ)
MD-MX30:
12P(UJ)
C339
C335
100P 330P
2 1 1 3
F
3 4 5 6 6 4
G
C338 D301
0.001 DS1SS133
D302
DS1SS133
CHASSIS
GND
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 31.
1
IC303
LA1832S
R354
3.9K
R359
1.8K
3.9V(1.3V)
PHASE
MO/ST 12
(FM/AM)
L-CH OUT
R-CH OUT
11
PHASE
3.9V(1.9V)
10
MPX IN IF OUT
0V c4.2Vd
C398
100/10
+B
5.1V
9
MPX VCO VCC
C399
C377
0.022 0.047
3V
8
FM DET
CF351
R353
270
C354
5.2V
STEREO 7
0.022
C353
5.2V
6
SD
0.022
0V
FM/AM OUT GND 5
2.1V 3
AM LOW CUT
4
AM IF IN
2
R352
1
1K
CF352
VSM
AM RF IN
FM AFC
C350
2.2V
REG
3
0.047
AM MIX OUT
5.1V
2
AM OSC IN
C352
2.2V
FM IF IN
1
AM OSC OUT
10/16
C351
0.022
R351
5.6K
+B
R336 3
2
10K
1
CF302
FM IF
R323
68K
C334
MD-MX30W:
18P(UJ)
MD-MX30:
15P(UJ)
C337
0.022
FM SIGNAL
AM SIGNAL
2 3
Figure 48 SCHEMATIC DIAGRAM (12/13)
C395
ZD351
0.022
DZ5.1B
R391
390
R389
+B
3.9K
R392
390
C370
1/50
+B
R395 R360
47K 4.7K
IC302
LC72131
PLL(TUNER)
R378
R377
47K
C386 82K
330P
5.2V
R393 0V IF IN
12 11
ST IND
1K
5.2V 0Vc4Vd
13 IO2 MO/ST 10
L351 0V 0Vc4.9Vd
C385
14 NC MUTE 9
0V
100 H 0.01
3.9V(0V)
(2.5V)
15 AM IN MW 8
C387
2.6V(0V) 0V(11.6V)
16 FM IN FM 7
0.022
5.2V
17 VDD
C380
R379
2.2K
10/16
0.9V 5V
18 6
PD DO
C392
0.9V
19
0.001 AIN
R380
0V
1.5K 5
CL
C393
C394 0V
4
2.8V DI
47/16 1/50
(1.3V)
0V
20 3
AOUT CE
R381
0V
21
VSS NC 2 0V
10K
2.6V 2.6V
X IN
22
1
X OUT
C397
R382
0.022
150 C382
(1/4)
C381 15P
X352
(CH)
12P 4.5MHz
(CH)
C384
0.001
TP301
L342
2.2 H
R345
4.7K
C347
0.022
C346
R301
0.022 150
C345
0.022
R369
750
C321
100/16
C390
0.001
1 2 3
SO301B
AM GND FM
75ohms
4
– 48 –
TUN/R
A_GND
TUN/L
A+12V
SM
D_GND
CE
CLK
+B DO
DI
R385
5.6K
C391
R384
47/25
5.6K
D352
DS1SS133
0V
5V
DO
R371
Q371 5V
4.7K
KTA1266 GR
CLK
R372 1K
DI
R373 1K
CE
R374
1K
C341
0.022
FE301
FM FRONTEND
0V
1
IF OUT
0V
2
GND
2.6V(0V)
3
F OUT
2.8V(1.3V)
4
VT
6.5V(0V)
5
VCC
0V
6
GND
0V
7
GND
0V
8
ANT
C389
0.001
C301
0.001
CHASSIS
GND
5
1
1
2
3
4
5
6
7
8
9
10
10
6