Marantz sr-18 u Service Manual page 8

DE-EMPHASIS
50µS
P104 1/2 /SCAN STEP SW. 9kHz
TUNING VOLTAGE (OTHER)
K ONLY
FM 87.5MHz 108MHz
Tuner P.C.Board
2.1V 7.2V
AM 520/531kHz 1710/1602kHZ
1.1V 7.6V
75µS
10kHz
TUNING VOLTAGE (F)
ST DIST
A101
011K F:AV00901010
FM 76.0MHz 90MHz
260J123010 OTHER:AV00903010
1.7 4.0V
AM 531kHz 1602kHZ
FM FRONT-END
1.1V 6.9V
J101
8 7 6 5 4 3 2 1
Ω
FM75 R217
180
R101 1/4W
ANT 10k
1/2W
F,U ONLY
TERMINAL GND U ONLY
C202
C216 0.01
100/16V
R201
AM
100
K,KS,N ONLY
C218
0.01 RA01
LA01
U104 10k
MW-ANT
F,K,KS,U
9.2
CA01
20P
CA02
0.047
MW TRACKING
600/603kHz MW TRACKING
1400/1404kHz
LA03
LW-ANT
CA08
20P
15P CH
LW TRACKING LW TRACKING
0
170kHz 260kHz
QA03 0
J102 2SD2144 (0)
YL01010140 S/U/V [0.7]
AM(LW)BLOCK
J104
YL01010140
J106
YL01010140
C365
D351 R356
47/16V
5.1V 470 1W
+15VA
C373
0.01
C353
330p
C364 100p
C363 100p
R357
C362 100p
10k
C361 100p
C356 15p
100/16V
24 23 22 21 20 19 18 17 16 15 14 13
RA74
1K
1 2 3 4 5 6 7 8 9 10 11 12
C357 15p
R352 100k TUNED ON :L
R353
470k TUNED OFF:H
Q353
C352
28
DTA114ES
10/50V
/ETC
C354
560p
C374
L359
0.1
1
C366
1/50V
CA51
1000P
R354
R355 10k
Q352
DTC114ES LA51 RA77
/ETC 450kHZ 10k
(AM SEP.ADJ)
KS,N ONLY (RDS)
RDS BLOCK
9
C309
0.015
50V
C310
S301 0.015
50V
FM MUTE R211
R212 C222 F,U:10k
F201 10k 1000p K,KS,N:22k
K,KS,N:FF11070620
C220
U,F :FF11070610
2200P
R205 C223 C217
R203
0.01
2.2k 330
LA05
12.0V
39MH
(0V)
R201 3.9V
Q202
(0V)
2SC1809S
P
3.1V C204 0.047
(0V)
R206
R204 C201 6.8k
R202 F202
470 0.01 FMCF
390 30 29 28 27 26 25 24
U107
C205
F201
FMCF 3.3/50V
C237
CA04 0.01
390P/100V
QA01
LA02 1 2 3 4 5 6 7
2SC536
DA01 VCD MW-OSC SP/ETC
0
CA05 (3.6V)
47P CH ?0V?
C206
C235
0 C203 10/50V
RA02 0.01
CA03
100k (4.3V) 0.047
15P CH LA06
?0V?
450kHZ
FA01
RA03
C219
10k SFZ450JL3
10/50V
DA02
CA06 0.01
*
R207
180
DA02 RA04 150k
+15VA 1/4W AM IF L201
QA02
1SS135
CA12
2SC536
DA03 150P MONO DIST
SP/ETC
VCD C233
CH
0.01 C208
0.047
4.7/50V
0V
CA09 CA11 (0V)
RA06
68 [3.6]
Q209
100k
CH
2SC536 FM AM IF/MPX
LA04
RA07 SP/ETC
RA08 LW-OSC
10k KS,N ONLY
150k
R221
5.8
DA04 10k
(0)
1SS135
KS,N ONLY
CA13 0.01 [0]
RA09
2.2k
CA14
CA07
0.01
0.01
N ONLY
C227 C217 R215 C301/302
U 2200P 0.027U 27k
K,KS,N 0.015U 68k
F 0.027U 27k
QA52
NJM7808F
CA77
XA51 RA61 CA66 +8V
10/50V
3.6MHz 2.7k 0.01
CA79
CA78 0.01
CA80
10/50V
RA62 RA75
2.2k 100k
CA67 QA53
47P (CH) DTC144ES
1.7
CA71
CA68
1000P
1/50V
MONO:5V
STEREO:0V
CA63
0.47/50V
QA54
2SC536
27 26 25 24 23 22 21 20 19 18 17 16 15 SP/ETC
RA51
47k
RA78
10k
2 3 4 5 6 7 8 9
10 11 12 13 14
CA76 RA60
RCH 1/50V 4.7k
R OUT
LCH
CA75 RA59
1/50V 4.7k
RA99
47k
CA62
CA61
680P
680P
RA69 RA70 RA56 P154 (RAS)
RA55
CA53 6.8k 6.8k 47k
47k
RA72
10/50V
6.8k
AM STEREO BLOCK
RA57 RA71 RA54 RA58
RA53
47k 27k 6.8k 47k 27k
F ONLY
CA57 330P CA59 330P CA58 330P CA60 330P
(M03)
+15VA
15.0 C507
C301
L301
0.01
(1.3)
SEP [1.3]
C303 Q203
10/50V DTA114ES
FM:L R510
/ETC
AM:H 4.7k
R315
2.7k 0
(15.0) R506
[15.0] 1k
C302
C225
L302
0.01
R504
R502 C505
4.7k
2.2k 2.2/50V
LCH
RCH
4.3
RCH
23 22 21 20 19 18 17 16 C508
100/16V
FM/AM IF MPX D201 C504 R505
* 0.01 1k
8 9 10 11 12 13 14 15
Q501
STRQ/MUTE LC72130
C502
24 23 22 21 20 19
47p CH
X501
7.2MHz
1 2 3 4 5 6
C501
47p CH
L501 47UH R511
8.2k
TU-CE
AM STOP
TU-DO
R214
L502 47UH
47k TU-CLK
C234 C236
0.01 L503 47UH
TU-DI
R209
4.7k
L504 47UH
MONO/ST
0
D503
Q204
F ONLY
DTC144ES
+15VA
R313
C313
C226 220 1/4W
47/16V
+15VA
0.01
0.047U QA08
DTA144ES C317
C314 C315
F ONLY
47/16V 0.01
0.033U
0.033U
R301 C305
4.7k 4.7/50V
8 7 6 5
QA07
DTC144ES
1 2 3 4
F ONLY
J103 C306 R302
JA51 F ONLY 4.7/50V 4.7k
+15V R304
7 7 F:4.7k
ST-IND
K,KS,N:10k
6 6
MONO/ST
5 5
IF-IN
4 4 R301 * C305 *
LCH
3 3 R302 * C306 *
2 2
RCH
1 1
L
R
30 29 28 27 26 25 24 23 22 21 20 19
REG
AM AM DECORDER
AM
AGC AM IF/DET
MIX RF AMP STEREO
BUFF OSC
SW
SD AM
COMP
S-METER STEREO DRV.
AM/FM
BUFF VCO FF FF FF
FM
TUNING DRIVE
S-METER
S-CURVE
PHASE DET
FM IF FM DET
GND VCC V-SM
1 2 3 4 5 6 7 8 9 10 11 12
Q201 LA1837
P104 - 1/2 (M03)
(RTU)
+15VA
PLL-BLOCK
R512
D501
270
+15VA
5.1V 1W
C503
100/10V
18 17 16 15 14 13
QA05
DTA144ES
R515
N ONLY
7 8 9 10 11 12 10k
14.9
(0.0)
R509 [14.9]
22k
MW
0
R507
(15.0)
68k RA10
R516 [0]
10k
*
F,N ONLY
14.9
R513
(14.9)
QA04 J105
10k
[0]
DTA144ES
N ONLY
1 N.C
TU-DO
TU-DO
2
TU-CLK TO JY70 (PY64)
0 3 TU-CLK
(0)
RDS-DI
[15.0] 4 RDS-DI
M06-CONNECT
TU-CE
5 TU-CE
TU-DI
6 TU-DI
TU-SD
7
QA06
DTC114ES
/ETC
C316 0.01 -15VA LW ONLY
R314
220 1/4W
PRE AMP K,KS,N,F ONLY
100p
R303
F:4.7k C311
R307
K,KS,N:10k 220 4.7/50V
TUNER-L
R309
47k
P104
R310
47k
- 2/2
TUNER-R
R308 C312
220
4.7/50V
C318
+15VA +15VA
100p
-15VA -15VA
R303 *
R304 *
U ONLY
L R
18 17 16
MUTE
PILOT
DET
13 14 15
10