Block Diagram - Tape Deck Section - Sony HCD-EP505 Service Manual

HCD-EP505
Ver 1.1
6-2. BLOCK DIAGRAM – TAPE DECK Section –
HPRE101 (1/2)
(RECORD/PLAYBACK)
L-CH
7 9
R-CH R-CH
R-CH
R-CH
8
REC/PB SWITCHING
U601
(AEP, UK, CH) (EXCEPT AEP, UK, CH)
BIAS
TRAP
R-CH
D601
HPRE101 (2/2)
BIAS OSC
(ERASE)
L603
BIAS OSC
Q615
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: TAPE PLAY
: RECORD
AMP GAIN
CONTROL
Q603
R-CH
6
OUT1
IN1
7
R-CH ALC
IN1
ALC
2
REC/PB AMP
Q618
ALC
4 CONTROL
(AEP, UK, CH) (EXCEPT AEP, UK, CH)
Q619
REC/PB
SWITCH
Q601
R-CH
REC BIAS
9V
SWITCH
Q617, 618
REC/PB
SWITCH
Q605
4
D603
MUTING
3
Q607
AMS
U603
(AEP, UK, CH) (EXCEPT AEP, UK, CH)
ALC,
6 TROUT
U602
(CrO 2 DETECT)
(HEAD POSITION DETECT)
(TAPE DETECT)
(PROTECT (FWD) DETECT)
(PROTECT (REV) DETECT)
TAPE PLAY/REC DETECT
SENSOR
CAPSTAN/REEL
M
(CAPSTAN/REEL) MOTOR DRIVE
Q620, 621
TRIGGER
(TRIGGER PLUNGER) PLUNGER DRIVE
Q622, 624
LED
D313
DRIVE
z
Q305
LED
D312
DRIVE
TIMER
Q304
16 16
REC AMP
Q611
R-CH
BUFFER
Q613
R-CH
TAPE TYPE
SELECT SWITCH
Q609
R-CH
V.N 1
SYSTEM CONTROLLER
IC301 (1/3)
BUFFER
Q625
SEL10
66
SEL12
68
70 SEL14
71 SEL15
90 SENSORA
96 AMS
95 MOTOR-ON
93 SOL
18 REC-LED
13 TIME
16 REC-EN
RL-CH
F
(Page 17)
RR-CH
TL-CH
TR-CH
SWITCHING
G
(Page 18)
CD-EN
CD-EN 92 I (Page 18)
TU-EN
TU-EN 94