Sharp MD-X7H, Руководство по обслуживанию

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– 39 –
MD-X8H
Figure 39 SCHEMATIC DIAGRAM (2/20)
7
8 9 10 11 12
1
2
CNP301
AM ANTENNA
TERMINAL
L341
BALUM
AM
GND
2
3 1
L354 LOW PASS FILTER
L321
3.9
µ
H
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8 9 10 11
13 14 12 16 17 18 19 15 21 22 20
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
+B
32
IC303:
FM IF DET./
FM MPX./
AM IF
AM SIGNAL FM SIGNAL
AM BAND
COVERAGE
MAIN PWB-A(1/3)
FM
ANTENNA
TERMINAL
FM FRONT END
VT
F OUT
IF OUT
ANT
GND GND GND
VCC
FM IF AMP.
FM MUTE
LEVEL
AMTRACKING
IC302:
PLL
CONTROLLER
X IN
X OUT
VSS
AOUT
AIN
PD
MW FM
VDD
AM IN FM IN
FM
NC NC
MO/ST
IF IN
ST IND CE DI CL DO NC
3
2
1
FM IF
3
2
1
IN
AM OSC
OUT AM MIX
OUT
AM OSC
FM IF IN REG
FM AFC
AM RF IN
VSM
FM/AM
OUT
AM LOW
CUT
IN AM IF SD GND STEREO FM DET VCC PHASE IF OUT
MPX VCO
MPX IN
R-CH OUT
L-CH OUT
MO/ST
PHASE (FM/AM)
MUTING
TUNER
MUTE
TUN MUTE
TO SYSTEM
P40(1-8) P41(7-12)
H G F E D C B A
SD D GND CL DO CE DI SM
O
N
L
K
J
I
TUN_RCH
TUN_GND
TUN_LCH
A_10V
TP TP
(UJ)
3 2
0V
0V
3.6V
0V
11.1V 11V
0V
0V
0V
0.6V
0V
0.6V
10V
4.8V
9.4V
0V
0.8V
4.9V
1
+B
+B
FM
75ohms
5.2V
(0V)
2.6V
(0V)
2V
(0V)
R376 1K
C386
330P
R379 2.2K
R371
1K
Q371
KTA1266 GR
R378
82K
C373
0.018
R363
5.6K
R364
5.6K
RT37 220K
SO301
R349
33
Q301
2SC380 O
R348 680
R347
6.8K
R399
33
C348
0.01
R372 1K
R373 1K
R374
1K
C368 1/50
R356
1K
C367
1/50
R350
2.7K
R351 5.6K
C374 0.018
C369 56P
ZD351
UZ5.1BSB
ZDT21
UZ5.1BSB
C396
100/10
R392
390
C395
0.022
R391
390
L352
100
µ
H
D302
1SS133
C301
0.001
D304
1SS133
D303
1SS133
C302
0.001
C338
0.001
D301
1SS133
FE301
C341
0.022
C383
150P
R344 680
R345 4.7K
C347
0.022
C346 0.022 C345 0.022
L342
2.2
µ
H
R369 820K
R346
330
FMIF
CF301
C340 100/16
R382
150
C331
0.047
C361 0.022
C362 3.3/50
C343 33P
VR351
10K(B)
C350 0.022
C344 33P
C352
10/16
C353 0.022
C354 0.022
CF351
D352
1SS133
D351
1SS133
C332
0.022
R383
5.6K
C397
0.022
L353
1mH
R393
1K
R384 5.6K
Q360
KTA1266 GR
R385 5.6K
C391
47/16
R360
4.7K
R359 1.8K
R395
47K
D353
1SS133
C392
0.001 C387 0.022
C394
47/16
R381
10K
R380
1.5K
C393
1/50
C371
1/50
L354
R361 3.3K
C372
1/50
R362 3.3K
C366 0.001
C363 0.022
C399 0.022
C398
100/10
C356
0.001
R354
3.9K
C334
10/50
C333 0.022
C330 6.8P R319 100K
T302
ZD352
MTZJ3.9B
Q361
KRC107 M
R387
22K
C380
10/16
IC302
LC72131
T351
CF352
R352
1K
CF302
C384
0.001
C358 1/50
R355
3.3K
C357 2.2/50
C370 1/50
C355
22P
IC303 LA1832
C351 0.022
R353
270
C342
0.022
C336
0.022
R358
8.2K
C364 10/16
C365 0.022
R357 470K
X351
10.7MHz
Q354
KTC3199 GR
Q353
KTC3199 GR
R367
1K
C375
3.3/50
R365
10K
R368
33K
R366
10K
L351
100
µ
H
R377
47K
C385
0.01
X352
4.5MHz
C381
12P
(CH)
C382
15P
(CH)
C376 0.022
FM IF
C389
5600P
C390
5600P
R397
5.6K
R398
5.6K
TO SYSTEM P40(1-8) P41(7-12)
AM IF
2.4V
0V
0.9V
4.9V
2.5V
0V
0V
4.9V
3.8V
0V
0.2V
4.9V
0V
2.4V
0V
0V
0V
0V
2.2V
0V
1V
1V
9
8
7
6
5
4
3
2
1
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC302
4.9V
3.6V
3.6V
1V
2.3V
2.1V
1.3V
3.6V
3.6V
3.7V
4.9V
4.95V
4.8V
0V
2.1V
4.9V
2.1V
2.1V
2..8V
3.8V
1.3V
1.2V
0V
3.5V
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC303
RT36 220K
RT35 220K
RT30 1K RT29 1K RT28 1K RT26 1K
CT28
47/10
LT21 2.2
µ
H
CT29
0.022
LT22
2.2
µ
H
CT27 22P (CH)
XT21
4.332MHz
CT26
22P
(CH)
CT25
560P
RT48
390
RT21 100K
CT23 10/16
CT24 0.022
CT21
47/10
CT22
0.022
ICT21
SYR
CE
DI
CL D0
RDS-ID
SYNC
T7 T6
VSSD
VDDD
XIN
VREF MPXIN VDDA VSSA FLOUT CIN T1 T2 T3 T4 T5 XOUT
ICT21:
RDS
LC72720
CT36
0.022
QT21
KTC3199 GR
RT34
56K
RT33
56K
CT37
0.022
RT32
1K
RT49
390
R370
1K
CT43
10/16
R301 300
R324
10K
0V(0V)
0V(0V)
4.8V(4.8V)
0V(5V)
0V
0V
5.2V(0V)
2.6V(0V)
0V
0V
0V
0V(0V)
2.6V(0V)
2.6V(0V)
2.6V(0.2V)
2.6V(0V)
5.2V(0V)
0V(0V)
0V(0V)
2.7V(0V)
0V(0V)
0V
0V(0.6V)
0V(0V)
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
ICT21
( ):AM
OTHER:FM(ST)
( ):AM
OTHER:FM(ST)