Schematic Diagram Mian Section (2/2) - Sony HCD-EP303 Service Manual

6-5. Schematic Diagram MIAN Section (2/2)

1 MAIN BOARD
(1/2)
(Page 22)
B
CASSETTE
BOARD
(Page 24)
Q201,202
REC AMP
2.1
1.4
R211
3.9k
R210
3.9k
1.4
2.1
C329
0.9
• See page 30 for IC Block Diagrams.
MAIN BOARD
(2/2)
C240
C250 0.0022
10u
50V
C251
4700p
C226 C230
0.0033 0.0082
C203
2
1u
50V
Q201
2SC945TP
C220
0.027
Q202
2SC945TP
2 0
C204
1u
50V
C225 C229
0.0033 0.0082
C201
0.1
1.7
Q312
2SD1616-L
ZD305
MTZJ-T-72-6.2B
+6V REGULATOR
C DISPLAY
(Page 26)
BOARD
IC203
FUNCTION SELECT SWITCH,
ELECTRONIC VOLUME
IC B/D
0.7
C248
R250
0.1
10k
50V
D314
0
1N4148
Q206
C214
2SC945TP
2.2u
R248 MEGA BASS
50V
2.2k
C242
D316
4.7u R234
1N4148
50V 6.8k
D312
1N4148
C212 2.2 50V
R240
8.2k
C214
C246
2.2u
0.001 Q301
50V
2SC3623-LK
R303
C315
0.7
4.7k
10
50V
C213
0.7
2.2u R304
50V 4.7k
Q302
R239
2SD1616-L
8.2k
R247
2.2k
Q301,302
C211
MUTING
2.2u
C245
Q205
50V
0.001
2SC945TP
MEGA RASS
R245
C241
6.8K
0
4.7u
50V
C247 0.7
0.1
50V
EXCEPT
R249
AEP,UK
10k
D307
8.6 <0>
1N4148
D308
1N4148 D317
9.7 15.3
1N4148
D309
1N4148 <9.3>
10.3
5.5
Q313
6.1 SC1383
EXCEPT
C327
AEP,UK 0.022
C323
0.022
ZD304 MTZN-T-72-10B
Q312
Q313 Q308, 309
+9V REGULATOR +8V REGULATOR
23 23
D DISPLAY
(Page 26)
BOARD
* CD * SUPPLIED AS THE ASSEMBLED BLOCK
BLOCK
C249
0.0022
R265 R264
R267
2.7k 2.7k
R266
10k
10k
EXCEPT AEP,UK
AM FREQ STEP
10 kHz
Q314
MUTING
CONTROL 9 kHz
SWITCH
0
IC301
0.6
POWER AMP
D306
Q314
1N4148
2SC945
TP-QP
9.1
0
0 +
16.9
0.6
–
C302
0.001
9 C306
0.15
BIAS CIRCUIT,
HEAT OPERATION
PROTECTION CIRCUIT
C305
0.15
C301 0.6
9
0.001
–
0
0 16.9
+
17.3 17.7
R343
10K
0.1
C342
C341
C343
10
10
10
50V
50V
50V
Q308
KTD2058Y
Q309
15.4 <15>
2SA733TP
0 <9.3>
15.4 <9.3>
0.9
R323
15.2 <0>
4.7k
Q311 C317
0 <0.7>
2SC945TP-QP
0 <0.7> 0.022
0.6 <0>
Q310
2SC945TP-QP
Q310, 311
REGULATOR
CONTROL SWITCH
HCD-EP303
HEADPHONE BOARD
JK401
PHONES
5 1
SPK301
R
SPEAKER
(IMPEDANCE
USE 4 ¶)
L
6
E
POWER
BOARD
D311 1N4148
CN402
D310 1N4148 (Page 28)
1