Sharp XL-505 - Figure 20 SCHEMATIC DIAGRAM (1;4); FRONT END

XL-505/505C,CP-505B
– 20 –
Figure 20 SCHEMATIC DIAGRAM (1/4)
A
B
C
D
E
F
G
H
1
23456
• NOTES ON SCHEMATIC DIAGRAM can be found on page 27.
AM BAND
COVERAGE
FM BAND
COVERAGE
FM RF
AM LOOP
FM
1
+B
+B
+B +B
+B
+B
+B
+B
+B
+B
321
+B
+B
+B +B
+B
+B
+B
+B
+B
+B
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
2
3
1
9
8
7
6
5
4
3
2
9
7
6
2
10
8
12
11
5
1
3
11
10
98
7
6
5
4321
1213
14
15
1617
18
19
20
21
22
123
4
5
6
7
8
9 10
11
12
1314
1516
17
18
1920
21
2223
24
9
4
3
7
5
6
8
12
FM MPX./ AM IF
FM IF DET./
PLL (TUNER)
HEAD SELECTOR
AMP.
EQUALIZER
REC./P.B.
AM ANT.
AM
TRACKING
AM OSC.
LEVEL
FM MUTE
SWITCHING
VOLTAGE
REGULATOR
AM IF
3
2
1
RF AMP.
3
2
1
FM IF
BAND PASS FILTER
ERASE HEAD
RECORD/PLAYBACK
HEAD
R-CH
L-CH
SWITCHING
SWITCHING
SWITCHING SWITCHING
SWITCHING
SWITCHING
BEAT CANCEL
SWITCHING
0V
10.8V
(0V)
32
1
BEAT CANCEL
SWITCHING
BEAT CANCEL
BIAS OSC.
SWITCHING
SWITCHING
REC MUTE
SWITCHING
REC MUTE
(10.8V) 10.8V
(0.14V)
0V
(0.15V)
0V
(0.8V)
0.3V
(0.8V)
0.3V
(0.15V)
0V
11.4V
(0V)
0.3V
(0V)
4.7V
32
1
3
2
1
32
1
REC SW
P/B SW
P/B SW
CONT
REC SW
+
–
–
+
ALC
MUTE
150K
150K
VSS
X OUT
AOUT
AIN
PD
FM
MO/ST
IF REQ
IF IN
SW
NC
AM IN
FM IN
VDD
DO
MW
FM
CL DI CE
NC
X IN
32
1
AM OSC OUT
FM IF IN
AM OSC IN
AM MIX OUT
REG
FM AFC
AM RF IN
SD
STEREO
VSM
AM LOW CUT
FM/AM OUT
MPX VCO
MPX IN
MO/ST
R-CH OUT
L-CH OUT
VCC
IF OUT
PHASE
(AM/FM)
PHASE
FM DET
GND
AM IF IN
(CH)
(CH)
FM FRONT END
(ML)
(CH)
(UJ)
(UJ)
(CH)
(UJ)
(CH)
(CH)
FM+B
(ML)
TAPE L
TAPE R
REC R
REC L
VT
TP301
(UJ)
CE
DO
CL
DI
MAIN PWB-A1
IC101
BA3126N
R101
1K
VR351
10K(B)
R352
1K
BF301
Q172
KRC102 M
Q155
KTC3199 GR
CN
C115
0.0022
C129
4.7/25
R121
4.7K
Q101
KTC3199 GR
C113
4.7/25
CNS101
CNP101
C373 0.018
R307
47
R110
3.9K
R138
330
C121
82P
CNP301
ANTENNA
VD301-1
KV1236Z2
VD301-2
KV1236Z23F
R376
10K
C310
0.001
R120 180
R119
180
R112
2.2K
R111
2.2K
C360
0.022
C349
0.022
C333
0.022
R387
5.6K
C374
0.018
C371
1/50
D104
1SS133
R114
3.3K
R132
4.7K
Q106
KTC3199 GR
R155
56
R157
150
R156
150
R103
120
R137
4.7K
R136 10K
D105
1SS133
D106
1SS133
Q171
KRA102 M
R139
2.7K
R140
10K
C101
470P
C102
470P
R102
1K
Q107
KRC104 M
R104
120
R153
10K
R113 3.3K
R154
10K
C118 0.022
R141 330
R106
150K
R134
100K
C126 22/16
R133
1K
R131
4.7K
Q105
KTC3199 GR
R127
3.9K
R129
3.3K
R105
150K
C109
0.015/50
R107
10K
R109
3.9K
C119 0.01
C107
47/16
C111
10/16
C112
10/16
C110
0.015/50
R108
10K
IC102
BA3311L
R130
3.3K
R135
680K
C125
100/25
R128
3.9K
C120
0.01
D102 1SS133
D101
1SS133
C105
270P
C104
330P
C123 2.2/50
C124
47/16
C108
47/16
C106
270P
C103
330P
C152
0.001
C151
180P
R160
5.6K
R159
5.6K
Q154
KTC3199 GR
C156
0.022
C153
0.0039
C154
0.027
R151
47K
R152
100K
Q153
KRC104 M
C155 47/16
Q152
KTA1266 GR
Q151
2SC2001 K
L151
330µH
R116
15K
C114
4.7/25
R126
5.6K
C130
4.7/25
R123
4.7K
R124
4.7K
R122
4.7K
R117
22K
R118
22K
Q103
KTC3199 GR
Q104
KTC3199 GR
Q102
KTC3199 GR
C117
10/16
R125
100K
C116
0.0022
R115
15K
C122
82P
R320
33
R321
22
C337
0.022
R371
1K
R372
1K
R373
1K
R374
1K
C370
1/50
C383 0.022
C386
330P
R386
330
R393
1K
R351 5.6K
R392
390
R391
390
R395
47K
X351
456kHz
Q351
KRC104 M
R361
22K
X352
4.5MHz
C384
0.001
C382
15P
C381
12P
L351
100µH
R377
5.6K
R359
1.8K
C380 1/50
C392
0.001
IC302
LC72131
R365
10K
R360
4.7K
R382
330
R381
10K
C393
1/50
R380
1.5K
R379
2.2K
C394
47/16
C385
0.01
C387 0.022
C397
0.022
R384
5.6K
R383
5.6K
R385
5.6K
C391
47/16
Q360
KTA1266 GR
L353
1mH
R358
8.2K
IC303
LA1832
CF351
C364
10/16
C356 0.001
R363
3.3K
R364
3.3K
R362
22K
C395
0.022
C396
100/10
ZD351
UZ5.1BSB
L352
100µH
C357
2.2/50
C358
1/50
C398
100/10
C352 10/16
R355
3.3K
R353
270
C355
22P
C399 0.022 C354 0.022
C353
0.022
C350
0.022
C351 0.022
CF352
T351
R357
470K
R356 1K
R350
2.7K
TP302
C372
1/50
C368 1/50
C367
1/50
C362 3.3/50
C369 56P
C366 0.001 C365 0.022
C363
0.022
C361 0.022
C343
33P
CF302
C342
0.022
R310
4.7K
C314 22P
C316
10/16
C317 0.022
R308 10K
VD302 KDV147C
R309
820
R305
680
C315
100P
R304
47K
Q305
2SC535 C
R301
22
L303
R303 33K
R302 100K
L302
D305
1SS133
C304 0.01
C306 6.8P
C303
0.001
C313 3.3P
R306
10
C312
33P
C311
15P
C309 0.001 C308 0.022 C307 0.0047 C305 0.0047
VD303 KDV147C
C318
4.7P
T304
IC301
TA7358AP
C319
18P
C331
0.047
C332
0.022
C330
8.2P
R319
100K
C336
470P
C335
18P
C334
18P
R336
4.7K
T302
R324
100K
R323
68K
T306
D302
1SS133
D301
1SS133