Schematic Diagram - Main Section (Aep, Uk, Chinese Models) (2/3) - Sony HCD-EP505 Service Manual

HCD-EP505
Ver 1.1
6-8. SCHEMATIC DIAGRAM – MAIN Section (AEP, UK, CH models) (2/3) – •
MAIN BOARD
(2/3)
HRPE101
RECORD/PLAYBACK/
ERASE
L-CH
CN601
7P
R-CH
ERASE
2
BIAS OSC
1 6
2 5
3 4
<0.4>
AC16.4
(REC MODE)
Q615
BIAS
OSC
2
MAIN
BOARD
(1/3)
(Page 21)
See page 19 for Waveforms.
REC/PB
<0>
SWITCH
{2.9} <0>{2.9}
Q603
AMP GAIN
1500P
50V
<0>{3.5} <0>
SWITCH
{0.4}<0>
{0.1}<0.7>
4700P
2200P
50V
U601
REC/PB SWITCHING
U602
<0>
SW R2
ALC,
<0.1> <0> <0>
<0>
GND REC/PB AMP
<0>
SW P2
IC B/D
<7.7>
VCC
GND
<0>{8.9}
CONT
<0>
<0>
<0.1>
SW P1
GND
<0>
SW R1
IC B/D 50V
2200P 4700P
Q602
REC/PB
<0.7>{0.1} <0>
SWITCH
{0.4}
<0>
50V
<0>{3}
1500P Q604
{3}<0>
AMP GAIN
CONTROL
<0>
{3.6}
<0>{8.9}
9.1
<9>{8.3}
{6.5}
Q616, 617
<9>{0} REC BIAS SWITCH
<0.4>
<0> {-0.4}
<0>{0.7}
{0.1}
7.9 7.9
REC AMP
4.6
50V
4.6
4.1 4.1
50V
REC AMP
• See page 32 for IC Block Diagrams.
50V <0>
<0>
Q605
REC/PB
SWICTH <0>
<2>
50V
50V
{0.1}
Q619 <0.7> <0>
ALC
CONTROL
<0>
<0>{0.7}
MUTING
50V
50V
50V <0>{0.7}
MUTING
<0>
50V
50V
Q606
REC/PB
<0>
SWITCH
<0>
50V
<0>
{0.7}
<8.4>{0.1}
<0>{0.7}
16V
INVERTER
50V
50V
2.4 2.4
1.6 1.6
16V
1 1
BUFFER BUFFER
22 22
12 0 (0)<11.6>
Q620, 621
CAPSTAN/REEL
MOTOR DRIVE
11.8 (11.8)
2SB926TP
U603
<10.8>
AMS
11.8 (11.8)
IC B/D
<2> <0.1>
<7.7>{6.9}
0 (0)<4.3>
50V
50V
2SD1616
0 (0)<11.5>
0
0
0
0.6
Q622, 624
TRIGGER
PLUNGER
DRIVE
BUFFER
4 5
0.6
0
4.5
Q609, 610
TAPE TYPE
SELECT SWITCH
133
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
( ) : CD PLAY
< > : TAPE PLAY
{ } : RECORD
1
TAPE
MECHANISM
BLOCK
SUPPLIED
WITH THE
9
ASSEMBLED
BLOCK
CN307
3P
C
DISPLAY
BOARD
(Page 29)
7
MAIN BOARD
(3/3)
(Page 23)
D
DISPLAY
BOARD
(Page 29)
CN302
7P
(Page 21)
1
MAIN BOARD
(1/3)
4
MAIN BOARD
(1/3)
(Page 21)