Sony CMT-EP305 / HCD-EP305 Service Manual ▷ View online
21
21
HCD-EP305
6-5. Schematic Diagram MIAN Section (2/2)
CASSETTE
BOARD
B
(Page 22)
MAIN BOARD
(1/2)
1
(Page 20)
IC B/D
DISPLAY
BOARD
C
(Page 24)
DISPLAY
BOARD
D
(Page 24)
POWER
BOARD
CN402
E
(Page 26)
5.3
2
1.4
2
1.7
9.7
10.3
15.3
0.7
0
8.6 <0>
15.4 <15>
15.2 <0>
0 <0.7>
0 <0.7>
0
0
9.1
0.6
0.6
17.7
0
0.7
0.6
0
0.7
0
9
16.9
16.9
9
17.3
0.6 <0>
15.4 <9.3>
0 <9.3>
0.9
<9.3>
6.1
5.5
2.1
1.4
2.1
4.7
8.1
0
0
3.8
4
4
4
4
4
4
4
4
0.7
0
4
4
4
4
4
4
4
4
3.8
0
4
0.1
0
SPK301
C306
0.15
C343
10
50V
C341
10
50V
D311 1N4148
D310 1N4148
C317
0.022
Q309
2SA733TP
Q308
KTD2058Y
Q313
SC1383
C327
0.022
D317
1N4148
D307
1N4148
D308
1N4148
D309
1N4148
Q311
2SC945TP-QP
Q310
2SC945TP-QP
Q310, 311
REGULATOR
CONTROL SWITCH
Q308, 309
+8V REGULATOR
Q313
+9V REGULATOR
Q312
+6V REGULATOR
Q312
2SD1616-L
C201
0.1
C329
0.9
C323
0.022
R323
4.7k
ZD302 MTZJ-T-72-9.1B
ZD304 MTZN-T-72-10B
ZD305
MTZJ-T-72-6.2B
1
6
C305
0.15
JK401
1
5
PHONES
IC203
FUNCTION SELECT SWITCH,
ELECTRONIC VOLUME
HEADPHONE BOARD
C250
10u
50V
50V
C240
0.0022
R242 3.3k
D333 1N4148
R265
2.7k
R264
2.7k
R267
10k
R266
10k
C249
0.0022
* CD
BLOCK
* SUPPLIED AS THE ASSEMBLED BLOCK
R243 3.3k
D306
1N4148
D314
1N4148
Q301
2SC3623-LK
Q206
2SC945TP
MEGA BASS
R303
4.7k
C246
0.001
R240
8.2k
R250
10k
R248
2.2k
R234
6.8k
C248
0.1
50V
C242
4.7u
50V
C230
0.0082
C226
0.0033
C220
0.027
C216 0.0082
C222 0.0088
C206 0.1
Q201
2SC945TP
Q202
2SC945TP
R211
3.9k
R210
3.9k
C204
1u
50V
Q201,202
REC AMP
REC AMP
C203
1u
50V
C210 0.1
C208 0.1
C205 0.1
C225
0.0033
C229
0.0082
C241
4.7u
50V
C209 0.1
C207 0.1
R215 5.6k
R219 8.2k
C215 0.0082
C219 0.027
C221 0.0082
C214
2.2u
50V
C214
2.2u
50V
C212 2.2 50V
D316
1N4148
D312
1N4148
C315
10
50V
C301
0.001
C342
10
50V
R343
10K
Q302
2SD1616-L
C302
0.001
Q314
2SC945
TP-QP
Q314
MUTING
CONTROL
SWITCH
R220 8.2K
R216 8.2k
C211
2.2u
50V
C245
0.001
R245
6.8K
R239
8.2k
R304
4.7k
R247
2.2k
R249
10k
Q205
2SC945TP
MEGA RASS
C247
0.1
50V
C213
2.2u
50V
+
–
–
+
–
BIAS CIRCUIT,
HEAT OPERATION
PROTECTION CIRCUIT
IC301
POWER AMP
R
L
SPEAKER
(IMPEDANCE
USE 4
¶)
MAIN BOARD
(2/2)
C251
4700p
4700p
Q301,302
MUTING
0.1
EXCEPT
AEP,UK
• See page 28 for IC Block Diagrams.
22
22
HCD-EP305
6-6. Printed Wiring Board CASSETTE Section
• See page 15 for Circuit Boards Location.
6-7. Schematic Diagram CASSETTE Section
0
1.2
1.4
4.1
0
0
8.1
0
0
4.1
1.4
1.2
0
0.6
0
0.6
0
0
0
0
3.6
9.7
9.7
9.3
No mark:FM
2
R-CH (REC/PB)
L-CH (REC/PB)
(ERASE)
HRPE701
(REC/PB ERASE HEAD)
CN701
4P
0.0018
15k
15k
0.0018
SW701 (4/6)
(REC/PB)
REC
R
PB
SW701 (2/6)
(REC/PB)
REC
r
PB
SW701 (3/6)
(REC/PB)
REC t PB
0.0027
0.022
+
50V
0.022
0.0068
Q706
REC BIAS OSC
SW701 (6/6)
(REC/PB)
REC T PB
Q704
2SC945
MUTING
CONTROL
SWITCH
25V
+
+
+
50V
5.6k
1.2k
0.1
SW701 (1/6)
(REC/PB)
REC
R
PB
0.1
50V
+
+
0.022
50V
+
+
0.1
50V
+
+
0.1
5.6k
1.2k
IN1
NF1
PC1
OUT1
GND
IN2
NF2
PC2
OUT2
VCC
ALC
IN1
ALC
CONST
ALC
IN2
RF
SW701 (5/6)
(REC/PB)
REC
r
PB
50V
+
IC701
ALC, REC/PB AMP
Q701, 702
MUTING
50V
50V
82k
2SC945
2SC945
2SC945
82k
+
+
CASSETTE BOARD
0.0015
0.0015
330
2SD1616-L
50V
100k
1N4148TP
1N4148TP
4.7k
(Page 21)
Q703
2SC945
MUTING
CONTROL
SWITCH
MAIN
BOARD
(2/2)
CN201
B
IC B/D
IC701
CASSETTE BOARD
B
MAIN BOARD
CN201
(Page 19)
1
2
3
4
5
6
E
E
E
E
E
K
A
A
K
SW701
(REC/PB)
REC
PB
HPRE701
REC/PB ERASE
HEAD
A
B
C
1
2
3
4
5
Ref. No.
Location
D701
B-4
D702
B-4
IC701
B-3
Q701
A-4
Q702
B-4
Q703
B-4
Q704
A-2
Q706
C-2
• Semiconductor
Location
• See page 15 for Waveforms.
• See page 28 for IC Block Diagrams.
• See page 28 for IC Block Diagrams.
23
23
HCD-EP305
6-8. Printed Wiring Board DISPLAY Section
• See page 15 for Circuit Boards Location.
IC601
IC603
REM601
IC602
DISPLAY BOARD
LED BOARD
LIQUID CRYSTAL DISPLAY
C
MAIN BOARD
CN302
(Page 19)
37
1
MEGA BASS
MUSIC MENU
+
–
VOLUME
VOLUME
D
MAIN BOARD
CN204
(Page 19)
K
A
+
–
TUNING
TUNING
+
–
PRESET
SHUFFLE
REPEAT
TIMER
TAPE
CD
TUNER
TUNER MEM
E
E
K
A
K
K
A
A
K
A
1
80
61
60
41
40
21
20
A
A
K
K
A
K
A
K
A
A
K
K
A
K
A
K
A
K
9
8
1
16
I
13
MAIN BOARD
CN101
A
(Page 19)
LCD BACK LIGHT
EXCEPT
AEP,UK
AEP,UK
A
B
C
D
E
1
2
3
4
5
6
Ref. No.
Location
D601
C-5
D602
C-4
D607
B-3
D608
B-3
D609
C-2
D610
C-2
D611
C-1
D612
C-3
D613
C-3
D614
C-3
D615
C-3
D616
C-5
D617
D-3
D619
A-6
D647
C-4
IC601
A-4
IC602
C-2
IC603
A-2
Q601
B-5
Q602
C-5
REM601
B-2
• Semiconductor
Location
24
24
HCD-EP305
6-9. Schematic Diagram DISPLAY Section
2.3
2.3
2.3
2.3
2.3
2.3
2.3
5.3
2.3
2.3
5.2
5.2
5.2
5.2
0.9<4.6>
5.2
4.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
2.3
3.1
4.7
5.3
4.7
5.2
1.6
<9.7>0.1
<4.7>4.3
3.9
<0>1.4
0
0.6
0.6
0
4.6
<4.6>4.3
5.4
<0.1>5.3
0
5.3
0
3
2.5
4.7
4.7
4.7
0
4.7
4.7
0
<4.5>0
0
0
<5.1>.2.6
5.2
<1.9>5.2
4.7
5.3
5.3
5.3
5.3
5.3
5.3
5.3
4.7
5.3
5.4
5.3
5.3
5.4
5.4
5.2
5.2
0.1
MAIN
BOARD
(1/2)
CN101
A
(Page 20)
1N4148
1N4148
1N4148
1N4148
1.8k
SC945
SC945TR
1.8k
Q603,604
SWITCH
SEL2215S-CD
2.7k
TIMER
1N4148
Q601,602
BUFFER
0.1
0.1
0.1
18p
20p
6MHz
0.1
0.022
PST529D
O
G
I
10
16V
1N4148
1N4148
1N4148
1N4148
TC4094BF
1N4148
1N4148
1N4148
0.1
22
10V
0.1
1N4148
MAIN BOARD (2/2)
CN204
D
MAIN BOARD (2/2)
CN302
C
(Page 21)
(Page 21)
DISPLAY BOARD
I/
TAPE
TUNER
CD
MUSIC MENU
MEGA BASS
TUNER MEM
PRESET +
PRESET -
VOLUME -
VOLUME +
TUNING +
REPEAT
SHUFFLE
TUNING -
LED BOARD
COM0
S31
S30
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
COM1
COM2
COM3
BIAS
VLC0
VLC1
VLC2
TUNER
TAPE
CD
TIMER STATUS
VSS
CD RESET
SURROUND
PLL CL
PLL DI
TUNER SD
CLOCK
DATA
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
IC601
UPD753016AGC
S0
CPU RESET
KEY R3
KEY R2
KEY R1
KEY R0
12/24H SELECT
NC
CD
DATA
DATA
PLLDO
SELECT
X2
X1
IC
XT2
XT1
VDD
DPSW2/SLEND
BASS BOOST
PSW
RDS DATA
SHRST
CE
PLLCE
MUTE
SYNCRO
REMOTE
RDS CLOCK
CD CLOCK
STEREO
IC601
SYSTEM CONTROLLER
LIQUID CRYSTAL DISPLAY DRIVER
LIQUID CRYSTAL DISPLAY
LD621
IC603
RESET SIGNAL
GENERATOR
IC602
KEY CONTROL
(LCD BACK LIGHT)
REM601
REMOTE CONTROL
RECEIVER
REM601
3
• See page 15 for Waveforms.
Click on the first or last page to see other CMT-EP305 / HCD-EP305 service manuals if exist.