Sharp HT-DP3000 Service Manual page 16

HT-DP3000
A
C253
0.018
C254
B
0.018
C248
0.0047
TP301
C241
680P
C
C238
0.022
C236
0.022
C237
3.3/50
C226
33P
R224
8.2K
D
VR201
10Kohm
(B)
C225
0.022
C220
0.022
C219
0.047
C218
8P
E
T201
AM ANT
F
G
D202
1N4148
D201
1N4148
AM_ANT
SOC201
FM
H GND
AM
ANTENNA
75ohms
TERMINAL
NOTES ON SCHEMATIC DIAGRAM can be found on page 24.
1
Q202
1
KRC104 M
C255
2 0.022
3
R229
2.7K
IC203
LA1833
R228
3.9K FM/AM IF MPX
R230
C245
2.7K
AM'( )
C252
AM
1/50
12
/FM
1.8V
2.15V
L CH
13
(2.15V)
(1.8V)
1.7V
R CH
14
(1.7V)
15 PHASE 11
2.0V (3.53V)
C247
(2.0V)
0.1
R253
R223 R222
68K
470K 1K 2.1V
MPX IF
16 10
-IN OUT
(2.1V)
R217
C243
C244 4.9V
J202
56P 22K (4.9V)
1/50
15K
9
17 VCC
2.0V
R220
(2.0V)
270
FM
FM
18 8
DET
2.6V OUT
C246
0.0039 (2.6V)
0.022
C240
R251
0V
AM
19
7
22K STEREO
0.1 (0V)
OUT
C239
0.4V
10/16 20 VSM SD 6
(0.4V)
5.0V
(5.0V)
GND
5
2.4V(2.4V) 0V(0V)
AM
AM RF
21 4
IF
IN
R219
2.4V(2.4V)
FM
22
AFC
3.1V
(2.1V)
4.9V(4.9V)
C235
AM
REQ
23 3
0.022
OSC IN
3.4V(3.4V)
AM
24 AM 2
MIX
(4.9V)
OSC OUT
1
FM IF
L205 IN
1mH
R218
5.6K
R216
4.7K
R215
100K
C223
CF201
470P
FM IF
3
2
1
C222
18P (CH)
Q281
2SC535 C
R214
68K
R285
R281
33
2.2K
R282
R283
470
330
T203
C286 C281
0.022
18P (SL) C285
0.01
C224
0.022
R208
10K
C212
C214
VD202 22P
10/16
KDV147C
R207
C215
47
0.022
3.8V T202
9 R206
10
8
3.8V
C209
C210
7
3.1V 15P
33P
6
3.8V
5
1.5V
VD203
R203
4
KDV147C
33K
R202
3
3.8V
100K
2
1.6V L201
1
FM RF
0.8V
C204
C217
7P
D205
18P
3
1N4148
2
1
FM_ANT
2 3
Figure 16 SCHEMATIC DIAGRAM (7/7)
1/50
C234
0.22/50
R221
3.3K
C233
1/50
R236
3.53V
10K
C231
22P
0V
(0V)
C275
100/10
C276
R249
0.022
47K
CF202
FM IF
C230
R248
R237
1K
5.6K C273
C229
C272
0.022
R246
CF203
270
AM IF
R250
3
MTZJ5.1B
5.6K
2
1
1K
C228
R245
0.1
5.6K
L204
4.9V
100µH
T204
R244
AM IF
L203
330
100µH
R231
10K
C263
0.022
C266
330P
C271
0V
C260
IF IN IO1
12
220/16
1/50
3.5V 13 IO2
0V
14
C274 C267 0V
AM IN
15
0.022 0.022 (2.6V)
C265
2.6V
0.01 16
FM IN
(0V)
R240 R238
C269
17 VDD
10K 2.2K
0.001 5.2V
18 PD
0.9V
C270
A IN
19
1/50
0.9V
R239
20 A OUT
1.5K
21
VSS
X OUT
22
R210
4.7K
IC202
LC72131
CONTROLLER
C213
100P
Q201
R205 C261
2SC535 C
680 12P
R204
R299
47K
47
C250
0.001
C207
0.001
C206
0.022
R201
22
C203
0.0047
C205
0.0047
C227
0.022
4
– 16 –
TO MAIN PWB
P14 2-A
CNP201
CNS201
1 2 3 4 5 6 8 9 10 11 12
7
+B
100/10
0.022
ZD201
+B
C268
47/16
R243
5.6K
R242
5.6K
0V
11
0V
BO4
10
3.9V
FM
9
BO2
8
BO1 R232
7
1K
5.1V
DO
6
R233
4.8V
CL 5
1K
0.1V
R234
DI 4
1K
0.1V R235
CE 3
1K
2
0V
1
X IN
2.6V
PLL
X202
4.5MHz
C262
15P
C264
0.001
FM SIGNAL
AM SIGNAL
TUNER PWB-B
5 6