Read Sony CMT-EP707 / HCD-EP707 Service Manual online
23
23
HCD-EP707
5-8.
SCHEMATIC DIAGRAM – MAIN Section (2/2) –
•
See page 20 for Waveform.
•
See page 30 for IC Block Diagrams.
(Page 25)
MAIN
BOARD
(1/2)
2
MAIN
BOARD
(1/2)
1
REGULATOR
BOARD
F
POWER AMP
BOARD
E
DISPLAY
BOARD
G
2
IC B/D
IC B/D
0.6
0
0
0.6
3.7
8.3
3.7
0
0
0
<0.3> {-0.5}
<0.2>
{8.4}
<0>
{0.4}
<0.1>
{9.2}
<11.8>
<0>
{11.8}
<0.1>
{9.2}
<0.7>
{0}
<0>
{0.7}
<8.9>
{0}
<0>
{0.7}
<8.9>
<0>
{8.9}
<8.9>
{8.2}
<0>
{0.7}
<5.2>
{0}
<8.9>
{-15.1}
<8.9>
<8.1>
{8.9}
<0>
{8.9}
<1.5>
{0}
<11.8>
<11.8>
<11.1>
<0.1>
<0.7>
<4.2>
<4.2>
<5.1>
<8.5>
<4.8>
{0}
<2> <2.5>
{0}
<2>
<0.6>
<0>
<0>
{0.7}
<0.8>
{0}
<0.6>
<0>
<1.7>
{0}
<0>
<1.8>
<0>
<1.8>
<0>
<0>
<1.8>
<8.1>
<1.8>
<1.7>
{0}
<0.9>
{1.7}
<0.9>
{0}
<0>
{4.5}
<0.9>
{1.7}
<0>
{1.7}
<0.9>
{1.7}
<0.4>
{1.7}
<0>
{4.5}
<0>
{0.2}
<2.7>
{0}
<0>
{-11.3}
<0>
{-11.3}
<3.6>
{-13}
<3.6>
{-13}
<3.6>
{-13}
<3.6>
{-13}
<0>
<0>
<0>
<0>
{7.6}
<0>
{7.6}
<0>
<2.7>
{0}
<0>
{0.2}
<0>
{0.7}
<0.8>
{0}
<0.9>
{0}
<0.9> {0.7}
<1.7>
{0}
<0>
{1.7}
<0.9>
{1.7}
<0.9>
{1.7}
<0.4>
{1.7}
<0>
{4.5}
<0> {4.5}
<12>
<12>
<0>
<0>
CD_DRV_B+
R-OUT
L-OUT
L-CH
REC-EN
MOTOR ON
R-CH
SOL
RIN
LIN
+5V
12V
MAIN BOARD
(2/2)
IC210
HEADPHONE AMP
IC208
ALC,
REC/PB AMP
IC209
AMS
4P
5P
10P
16V
16V
16V
4.7U 50V
4.7U 50V
C315
16V
68
1000U
10V
HEADPHONE
BOARD
PHONES
50V
2P
5P
ERASE
L-CH
HRPE201
(RECORD/PLAYBACK/ERASE)
R-CH
16V
1000P
1000P
2.2U
50V
6.8k
2.2U
50V
1000P
50V
0.027U
3.3k
39mH
1500P
50V
1000P
50V
2.2U
50V
2.2U
50V
50V
1000P
1000P
6.8K
0.027U
3.3K
50V
1500P
39mH
2.2k
6.8k
2.2k
50V
2.2U
50V
2.2k
8200P
6800P
0.022U
50V
16V
1000P
2.2k
2.2U
50V
16V
16V
50V
4.7U
50V
2.2U
50V
5.6k
16V
2SC1616
0.1U
16V
4.7U
50V
22k
3.9k
3.9k
4.7U
50V
5.6k
22k
50V
2.2U 50V
2.2U 50V
5.6k
7P
SUPPLIED
WITH THE
WITH THE
ASSEMBLED
BLOCK
TAPE
MECHANISM
BLOCK
∗
∗
1
2
3
4
5
1
2
3
4
5
6.8k
50V
9P
12V
VDD
GND
Q253, 254
MUTING
R411
2.2k
R405
2.2k
IC210
Q215, 216
TRIGGER
PLUNGER
DRIVE
BIAS
OSC
Q226, 227
REC BIAS
SWITCH
2.2U
50V
Q229 – 232
REC/PB
SWITCH
REC
MUTING
68k
68k
Q245, 247
PB MUTING
REC
MUTING
Q235, 255
AMP GAIN SWITCH
REC/PB
SWITCH
ALC SWICTH
Q242, 256
AMP GAIN
AMP GAIN
SWITCH
REC/PB
SWITCH
MUTING
TAPE TYPE
SELECT SWITCH
MUTING
TAPE TYPE
SELECT SWITCH
VCC
V8
DIO OUT
TR OUT
GND
NC
NF
GR
V. N
C324
0.1
REC/PB
SWITCH
Q220, 221
REC/PB
SWITCH
Q217, 218
CAPSTAN/REEL
MOTOR DRIVE
BUFFER
Q224, 225
INVERTER
INVERTER
INVERTER
2SB1240
(Page 29)
(Page 22)
(Page 22)
(Page 27)
Ver 1.6
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