Sony CMT-EP505 / HCD-EP505 Service Manual ▷ View online
HCD-EP505
22
22
6-8.
SCHEMATIC DIAGRAM – MAIN Section (AEP, UK, CH models) (2/3) –
•
See page 19 for Waveforms.
•
See page 32 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
(
no mark : TUNER
(
) : CD PLAY
<
> : TAPE PLAY
{
} : RECORD
2
DISPLAY
BOARD
C
MAIN BOARD
(3/3)
7
DISPLAY
BOARD
D
MAIN BOARD
(1/3)
1
MAIN BOARD
(1/3)
4
MAIN
BOARD
(1/3)
2
IC B/D
IC B/D
IC B/D
<0>
{2.9}
{0.1}<0.7>
<0.1>
<0.1>
<1.3>
<1.4>
<3.7>
<7.3>
<7.3>
<0>
<0> <0>
<0>
<0>
<0>
<1.3>
<1.4>
<3.7>
<0>{8.9}
<0>
<0>
<0>
<0>
<0>
<7.7>
<0>{2.9}
<0>
{0.4}<0>
{0.1}
<0.7>
<0.7>
<0>{0.7}
<0>{0.7}
<0>
{0.7}
{0.7}
<0>
<0>
<0>
<0>
<0>
{0.4}
{0.4}
<0.7>{0.1}
<0>{3}
{3}<0>
<0>
{3.6}
{3.6}
9.1
<0>{8.9}
<9>{8.3}
<9>{0}
<0>{0.7}
<0.4>
{-0.4}
{-0.4}
<0>
{0.1}
<0.4>
{6.5}
AC16.4
(REC MODE)
<0>{0.7}
<8.4>{0.1}
<0>
<0>{3.5}
4.6
4.1
7.9
4.6
4.1
1.6
1
7.9
2.4
1.6
1
2.4
<2.5>{0}
{0}<4.9>
<7.7>{6.9}
<2>
<2>
12
11.8 (11.8)
<10.8>
0 (0)<4.3>
0
4
0 (0)<11.6>
11.8 (11.8)
<0.1>
<0.1>
0 (0)<11.5>
5
0.6
0
4.5
0.6
0
0
<0>
1500P
50V
REC/PB
SWITCH
2200P
Q603
AMP GAIN
SWITCH
4700P
50V
50V
Q619
ALC
CONTROL
50V
50V
50V
4700P
2200P
50V
50V
Q604
AMP GAIN
CONTROL
Q602
REC/PB
SWITCH
50V
1500P
BIAS OSC
1
2
3
6
5
4
Q615
BIAS
OSC
Q616, 617
REC BIAS SWITCH
REC AMP
50V
REC AMP
50V
16V
BUFFER
50V
50V
BUFFER
INVERTER
16V
Q606
REC/PB
SWITCH
MUTING
50V
50V
MUTING
50V
50V
50V
Q609, 610
TAPE TYPE
SELECT SWITCH
2SB926TP
Q620, 621
CAPSTAN/REEL
MOTOR DRIVE
2SD1616
Q622, 624
TRIGGER
PLUNGER
DRIVE
BUFFER
133
CN307
3P
1
9
CN302
7P
ERASE
L-CH
R-CH
HRPE101
RECORD/PLAYBACK/
ERASE
CN601
7P
MAIN BOARD
(2/3)
U601
REC/PB SWITCHING
SW R2
GND
SW P2
VCC
GND
CONT
SW P1
GND
SW R1
U602
ALC,
REC/PB AMP
IN2
NF2
PC2
OUT2
ALC
IN2
RF
VCC
IN1
FM1
PC1
OUT1
ALC
IN1
ALC
CONST
GND
U603
AMS
V. N
C. R
NF
NC
GND
TROUT
DIOUT
V8
VCC
Q605
REC/PB
SWICTH
50V
SUPPLIED
WITH THE
WITH THE
ASSEMBLED
BLOCK
TAPE
MECHANISM
BLOCK
(Page 21)
(Page 21)
(Page 21)
(Page 23)
(Page 29)
(Page 29)
Ver 1.1
HCD-EP505
23
23
POWER
BOARD
CN505
E
MAIN
BOARD
(2/3)
7
MAIN
BOARD
(1/3)
5
MAIN
BOARD
(1/3)
3
MAIN
BOARD
(1/3)
6
15.1
15.1
14.8 (0.1)<14.8>
15.1
15.1
0 (9.4)<0>
15.1 (8.6)
<15.1>
<15.1>
2 (9.1) <2>
0 (9.5)<0>
0 (0.7)<0>
9.1
11.9
12.3
14.7
13.3
12.6
18
18
37.5
0.7
1.1
0.6
8.1
0
0
0.6
1.1
0.7
0
0
0
0
3.6
3.6
13.9
6.1
5.5
18.5
2SD1616
Q808
+12V REGULATOR
50V
16V
133
50V
+12V REGULATOR
REGULATOR
CONTROL SWITCH
I
O G
U801
+9V REGULATOR
133
Q802, 803
+8V REGULATOR
16V
2SD1616
+5V
REGULATOR
50V
133
133
50V
DTC343
DTC343
Q505, 506
MUTING
50V
U502
POWER AMP
50V
50V
50V
50V
U503
HEADPHONE AMP
+
−
−
+
CN503
4P
R
L
SPEAKER
IMPEDANCE
USE 8Ω
CN503
7
6
4
9
8
5
1
2
3
H501
PHONES
7
1
5
1
MAIN BOARD
(3/3)
HEADPHONE BOARD
6-9.
SCHEMATIC DIAGRAM – MAIN (AEP, UK, CH models) (3/3) Section –
•
See page 19 for Waveforms.
•
See page 32 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
(
no mark : TUNER
(
) : CD PLAY
<
> : TAPE PLAY
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
(Page
21)
(Page 21)
(Page
21)
(Page 22)
(Page 31)
Ver 1.1
HCD-EP505
24
24
6-10. PRINTED WIRING BOARDS – MAIN Section (Except AEP, UK, CH models) –
Ver 1.1
U401
U402
U602
U603
U502
U501
U503
U801
U601
E
C
B
C
B
B
C
E
C
E
B
C
E
C
E
B
C
E
C
E
E
C
B
C
B
B
C
E
C
E
B
C
E
C
E
E C B
E C B
B
C
E
C
E
B
C
E
C
E
B
C
E
C
E
E
C
B
C
B
E
C
B
C
B
C B E
B
C
E
B
C
E
E
1
3
2
E
C
B
E
C
B
B
E
C
B
C
E
E
B C E
E
C
B
C
B
E
C
B
C
B
E
C
B
C
B
B
C
E
C
E
B
C
E
C
E
B
C
E
C
E
E C B
E C B
E C B
B C E
E C B
E
C
B
C
B
A
K
A
K
B C E
B C E
B
C
E
C
E
B C E
B
C
E
C
E
A
K
A
–
+
–
+
L
R
MAIN BOARD
E
C
B
C
B
C
B
E
B
E
1
11
5
4
6
1
3
2
1
2
3
5
6
4
1
3
TP
(FM ANT)
TP
(FM VT)
1
2
AM FREQ
STEP
9kHz
10kHz
HEADPHONE
BOARD
1
2
3
4
6
7
8
9
H501
PHONES
5
1
5
K
A
SPEAKER
(IMPEDANCE USE 8Ω)
J
POWER
BOARD
CN505
G
DISPLAY
BOARD
I
DISPLAY
BOARD
∗
TAPE
MECHANISM
BLOCK
∗
CD
BLOCK
∗
SUPPLIED AS THE
ASSEMBLED BLOCK
H
DISPLAY
BOARD
5
1
3
2
4
3
4
5
6
1
2
F
DISPLAY
BOARD
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
CN401
FM ANT
75Ω
COAXIAL
2
1
AM
ANT
CN402
TP
(AM VT)
CN503
∗
SUPPLIED AS THE
ASSEMBLED BLOCK
(Page 30)
(Page 28)
(Page 28)
(Page 28)
D401
F-4
D402
F-3
D403
F-4
D404
F-4
D405
F-7
D501
I-11
D502
J-6
D503
I-6
D505
K-10
D506
L-9
D507
L-7
D508
G-5
D601
E-16
D603
G-15
D604
G-14
D605
N-12
D801
N-11
D802
L-11
D803
O-5
D804
O-5
D806
L-10
D808
O-10
D904
K-5
D905
J-5
Q401
G-4
Q402
C-4
Q403
E-7
Q404
C-10
Q405
B-11
Q406
B-10
Q501
H-5
Q502
I-5
Q503
I-6
Q504
J-6
Q505
L-9
Q506
L-8
Q601
D-12
Q602
E-15
Q603
D-13
Q604
D-15
Q605
C-13
Q606
D-15
Q607
F-13
Q608
F-14
Q609
F-13
Q610
F-12
Q611
G-8
Q612
G-9
Q613
I-13
Q614
I-13
Q615
C-15
Q616
F-15
Q617
G-15
Q618
G-15
Q619
F-13
Q620
M-13
Q621
M-13
Q622
N-13
Q624
N-13
Q625
H-14
Q801
N-7
Q802
M-10
Q803
M-10
Q804
L-9
Q805
N-8
Q808
O-5
U402
E-9
U403
C-7
U501
I-8
U502
L-6
U503
H-4
U601
C-14
U602
E-14
U603
G-13
U801
N-9
Z801
N-7
Z802
M-9
Z803
O-8
Z804
O-7
Ref. No.
Location
Ref. No.
Location
• Semiconductor Location
HCD-EP505
25
25
6-11. SCHEMATIC DIAGRAM – MAIN Section (Except AEP, UK, CH models) (1/3) –
•
See page 19 for Waveform.
•
See page 32 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
[
no mark : FM
[
] : AM
(
) : CD PLAY
<
> : TAPE PLAY
Ver 1.1
21
IC B/D
IC B/D
DISPLAY
BOARD
F
DISPLAY
BOARD
G
MAIN
BOARD
(3/3)
13
MAIN
BOARD
(3/3)
15
MAIN
BOARD
(3/3)
16
MAIN
BOARD
(2/3)
14
MAIN
BOARD
(2/3)
11
MAIN
BOARD
(2/3)
12
IC B/D
3
1
1.7
4.2 [0.1]
0.1 [0.7]
1 [0]
4.9
4.9
1
[0.3]
0
4.9
4.9
4.9
4.2
[0]
[0]
4.2
[3.2]
4.1
[4.6]
1.3
4.9
1.3
4.9
2.5
[3.5]
0
4.9
4.9
1.3
1.3
0.1
[0.4]
0.1
[0.3]
4.9
0
0
0
0
(0)
<3.7>
0
(3.7)
<0>
3.7
(0)
(0)
<0>
4
4
4
4
4
4
4
4
3.7
(0)
(0)
<0>
0
(0)
<3.7>
0
(3.7)
<0>
4
4
4
4
4
4
4
4
0
8
4.8
0
0
0
0
0
0
0
0
0
0
0
2.5
[1.1]
0.9
0.9
4.9
2.4
[0]
[0]
0
[2.5]
0
0
0.1
[4.2]
4.9
4.8
0
0
2.3
4.9
(0)
(0)
<0>
4.9
(0.4)
<0.4>
5.5
(0.4)
<0.4>
9
(0.4)
<0.4>
9.1
0.7 (0) <0>
8.3
(9)
(9)
<9>
0 (9) <9>
2.4
TC401
FM TRACKIG
L407, TC402
AM TRACKIG
L408
AM FREQUENCY
COVERAGE
T401
AM IF
MOTOR ON
CN303
11P
CN305
9P
CN101
9P
MAIN BOARD
(1/3)
U401
U402
U501
TP
(FM VT)
IN
2.2K
0.1
1
2
3
IN
100N
2.7N
3.3K
50V
50V
50V
FM/AM
BAND SELECT
SWITCH
16V
100N
IN
2.2U
50V
10N
IN
IN
6.8N
6.8N
50V
50V
50V
1.2K
2SC2785
Q401
FM OSC BUFFER
IN
IN
ISV101
ISV101
3.3K
TP
(FM ANT)
133
133
IN
100N
25V
50V
C429
4.7U
BUFFER
AM RF
133
133
TP
(AM VT)
50V
50V
5.6N
50V
50V
50V
50V
50V
50V
50V
4.7N
133
50V
5.6N
50V
470V
50V
6.8K
Q501, 502
MUTING
4.7U
50V
50V
133
133
133
4.7N
FM/AM IF AMP,
MIX, OSC, DET, MPX
FM/AM PLL
2SD1616
+5V REGULATOR
Q406, 407
B+ SWITCH
5.6B
50V
16V
2SA608
+
SUPPLIED
WITH THE
WITH THE
ASSEMBLED
BLOCK
CD
BLOCK
INPUT SELECT SWITCH,
ELECTRICAL VOLUME
Q503, 504
MEGA BASS
CONTROL
10kHz 9kHz
AM FREQ
STEP
6.8K
470N
50V
R401
330
(Page 26)
(Page 26)
(Page 27)
(Page 26)
(Page
27)
(Page 27)
(Page 29)
(Page 29)
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