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Schematic Diagram - Main Board (2/3) - Sony HCD-EP50LIV Service Manual

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Q Q
3 7 6 3 1 5 1 5 0
6-8.
SCHEMATIC DIAGRAM – MAIN Board (2/3) – •
MAIN BOARD
(2/3)
HRPE101
RECORD/PLAYBACK/
ERASE
L-CH
CN9
7P
R-CH
ERASE
T E
L
1 3 9 4 2 2 9 6 5 1 3
2
BIAS OSC
3
0.018
[0] <–2.3> <<43.3>>
[0.6] <–1.6> <<–0.9>>
ISS SWITCHING
RR-CH
i
2
RL-CH
i
MAIN BOARD
TR-CH
i
(1/3)
TL-CH
i
(Page 20)
w w w
5
REC. LED+
i
BEAT
i
MAIN BOARD
(1/3)
(Page 20)
.
See page 28 for Waveforms.
See page 28 for IC Block Diagrams.
Q28
50V
AMP GAIN CONTROL
[0]
[0]
50V
<3>
<3>
0.0015
[0.7] <0.1>
REC/PB
[0]
SWITCH
<3.5>
[0]
[0]
0.068
0.0022
0.0047
U12
0.047
REC/PB SWITCHING
[0]
SW R2
[0]
[1.3] [1.4] [3.8]
[0] [0]
GND
U13
[0]
SW P2
ALC,
[7.7]
REC/PB AMP
VCC
GND
[0]
CONT
[0]
[0]
[0]
SW P1
[1.4] [2.7]
[7.4] [7.4]
[1.3]
GND
[0]
SW R1
U13
AN7312
IC B/D
IC B/D
0.0047
0.0022
Q29
REC/PB SWITCH
[0]
[0]
0.068
[0]
[0]
[0.7]
<2.9>
<2.9>
<0.1>
Q27
0.0015
50V
AMP GAIN CONTROL
[0]
1SS133T
<3.6>
[0]
<8.9>
1SS133T
1SS133T
[9.1]
[9]
<8.3>
[0]
4
<6.6>
Q32, 33
[9] <0>
REC BIAS SWITCH
[0]
[0] <0.7>
[0]
5
0.022
<0.2>
0.001
Q31
BIAS OSC
0.1
[8]
[8]
[4.6]
[4.3]
50V
REC AMP
0.022
REC AMP
[3.8]
[4.1]
x
a o
y
i
http://www.xiaoyu163.com
8
[0]
[0]
REC/PB
[0.7]
SWITCH
<0>
0.001
[2] [0] [2]
50V
Q26
MUTING
[0.7]
[0]
<0.1>
[0]
[0.7]
<0>
50V
Q8
50V
ALC
CONTROL
[0.7]
<0>
[0]
MUTING
50V
[0]
[0]
Q
Q
3
7
6
3
50V
[0.7]
<0.1>
Q35
REC/PB
SWITCH
[8.4]
[0]
<0.1>
<0.7>
INVERTER
0.01
0.01
0
0
0.6
0.6
[0]
[0]
TAPE TYPE
TAPE TYPE
SELECT SWITCH
SELECT SWITCH
u 1 6 3
.
21
21
http://www.xiaoyu163.com
2
4
9
9
8
0
[12]
12.1
12
U14
[11.3]
AMS
U14
BA335
IC B/D
12
0
[0]
[7]
[0.1]
[5.6]
0.022
Q37, 39
CAPSTAN/REEL
MOTOR DRIVE
50V
0
[12]
2SD1616
0
0
[12]
0
[12]
0
Q38, 40
TRIGGER
0
PLUNGER DRIVE
Q14
1
5
1
5
0
8
9
2
4
BUFFER
4.1
[0]
5.7
4.6
U15
[0]
CAPSTAN/REEL MOTOR CONTROL,
TRIGGER PLUNGER CONTROL,
REC BIAS CONTROL
0
0
0
0
0
{0}
{0}
[5.7]
[0]
<5.7>
<5.7>
1SS133T
4.9
5.7
0
5.7
0
5.7
0
{0}
{5.7}
[0]
[0]
<0>
<0>
m
c o
HCD-EP50LIV
2
9
9
CN14
9P
TAPE
MECHANISM
BLOCK
CN15
9P
D
9
8
2
9
9
DISPLAY
BOARD
(Page 25)
1
I
CLOCK
MAIN BOARD
(Page 20)
I
DA_IN
(1/3)
7
(Page 22)
MAIN BOARD
I
CD-EN
(3/3)
I
TU-EN
3
I
TIMER
I
STR
MAIN BOARD
(Page 20)
(1/3)

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