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Block Diagram - Tape Deck Section - Sony HCD-EP50LIV Service Manual

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HCD-EP50LIV
Q Q
3 7 6 3 1 5 1 5 0
6-2.
BLOCK DIAGRAM – TAPE DECK Section –
HPRE101 (1/2)
(RECORD/PLAYBACK)
L-CH
7
R-CH
R-CH
R-CH
8
R-CH
T E
L
1 3 9 4 2 2 9 6 5 1 3
ISS SWITCHING
Q41
HPRE101 (2/2)
BIAS OSC
(ERASE)
L5
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TAPE PLAY
: RECORD
w w w
R-CH
6
IN1
7
R-CH
ALC,
REC/PB AMP
U13
9
R-CH
Q36
4
REC/PB SWITCHING
U12
BIAS
TRAP
R-CH
D32
D50
D4
REC BIAS
9V
SWITCH
Q32, 33
BIAS OSC
Q31
x
a o
y
.
i
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REC/PB
SWITCH
Q34
AMP GAIN
CONTROL
Q28
OUT1
4
ALC
D29
IN1
MUTING
ALC
3
Q26
2
ALC
CONTROL
Q8
(HEAD POSITION DETECT)
REC/PB
(PROTECT (FWD) DETECT)
SWITCH
Q30
(PROTECT (REV) DETECT)
Q
Q
3
7
6
TAPE PLAY/REC DETECT
M
(CAPSTAN/REEL)
(TRIGGER PLUNGER)
D313
z
D312
TIMER
SW318
(MONO STEREO)
STEREO
MONO
ISS
2
1
u 1 6 3
.
16
16
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2
4
8
9
9
REC AMP
Q25
TAPE TYPE
SELECT SWITCH
Q45
AMS
R-CH
U14
6
TROUT
V.N
1
BUFFER
(CrO
DETECT)
2
Q14
(TAPE DETECT)
3
1
5
1
5
0
8
9
2
SENSOR
CAPSTAN/REEL MOTOR CONTROL,
TRIGGER PLUNGER CONTROL,
REC BIAS CONTROL
U15
CAPSTAN/REEL
MOTOR DRIVE
14
Q5
STR
1
Q37, 39
TRIGGER
Q7
PLUNGER DRIVE
12
Q38, 40
DATA
2
CLK
3
LED
DRIVE
6
Q3
Q305
LED
DRIVE
7
Q4
Q8 11
Q304
Q6
13
4
Q1
m
+5V
c o
2
8
9
9
RL-CH
F
(Page 17)
RR-CH
R-CH
TL-CH
TR-CH
R-CH
SWITCHING
G
(Page 18)
SYSTEM CONTROLLER
IC301 (1/3)
94
SEL10
96
SEL12
98
SEL14
99
SEL15
4
9
8
2
9
9
18
SENSORA
24
AMS
44
STROBE
DA IN
H
(Page 17)
CLOCK
CD-EN
I
(Page 18)
TU-EN
ST/BEAT
C
(Page 15)

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