Schematic Diagram - Main (3/3)/Headphone Boards - Sony HCD-EP50 Service Manual

HCD-EP50
Ver 1.1
6-9. SCHEMATIC DIAGRAM – MAIN (3/3)/HEADPHONE Boards –
MAIN BOARD
(3/3)
i
6
i
MAIN BOARD
(1/3)
(Page 20)
i
U8
+5V
REGULATOR
5.7 8
O G I
0.7
1SS133T
1SS133T
(Page 20)
i
4.7k (AEP, UK, CH)
4 3.9k (EXCEPT AEP, UK, CH)
MAIN BOARD
(1/3)
i
7
1SS133T
i
MAIN BOARD
(2/3)
(Page 21)
1SS133T
0.5
14
{9.4}
{13}
0
Q9, 12
{10}
+8V
REGULATOR
0 4
{10.2} {10.2}
14
{9.8}
U10 0 14 {0.1}
{0.7} Q15
+9V
536N
REGULATOR 14
REGULATOR
9.1 {13}
O G I
CONTROL SWITCH
220 (AEP, UK, CH)
68 1W (EXCEPT AEP, UK, CH)
14 14
14
12.1 {13} {13}
{13}
O G I
13.3
{12.5}
0.1
0.7 Q19, 20
B+
* R163
SWITCH
1SS133T *
1k (AEP, UK, CH)
5.6k (EXCEPT AEP, UK, CH)
U7
50V
+12V
REGULATOR
1SS133T
Q47
+12
REGULATOR
13.2
2SD1616
12.5
{13}
13.6
{13.1}
U11
POWER AMP
17.5
50V
0.7
0
Q22
0
2SD1616
MUTING
1.1
Q21
2SD1616
1.1
MUTING
0
0
0.7
50V
GND
(AEP, UK, CH)
0.001
8.4
0.1
VCC
0
0.001
0.6
50V
0
50V
0.001
0.6
GND
(EXCEPT AEP, UK, CH)
22 22
(AEP, UK, CH)
(AEP, UK, CH)
17.5
(EXCEPT AEP, UK, CH)
+
R
–
– (IMPEDANCE USE 8Ω)
L
+
17.5
(AEP, UK, CH) (EXCEPT AEP, UK, CH)
VCC
35.5
U9
HEADPHONE AMP
3.7
CN
5P
3.7
0.001
8
1
CN2
4P
–1
DISPLAY
BOARD
(Page 25)
–2
AM FREQ
STEP
9kHz
r
10kHz
CN17
SPEAKER
HEADPHONE BOARD
8
1
7
9
4
5
JK401
6
PHONES
1
2
5
3
0.022
0.022
E
POWER
BOARD
CN601
(Page 27)
F