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

6-9. SCHEMATIC DIAGRAM – MAIN (AEP, UK, CH models) (3/3) Section – •
MAIN BOARD
(3/3)
(Page 21)
5
MAIN
BOARD
(1/3)
3
MAIN
BOARD
(1/3)
(Page
21)
U801
+9V REGULATOR
5.5 13.9
2SD1616
6.1
+5V
REGULATOR
50V
16V
133
6
MAIN
BOARD
(1/3)
133
(Page
21)
See page 19 for Waveforms.
Q802, 803
+8V REGULATOR
2 (9.1) <2> 15.1
0 (9.4)<0>
133
0 (9.5)<0> 15.1
15.1 (8.6)
<15.1>
14.8 (0.1)<14.8>
0 (0.7)<0>
REGULATOR
9.1 15.1 CONTROL SWITCH
O G
I
+12V REGULATOR
50V
11.9
15.1
12.3
2SD1616
12.6 14.7
13.3
Q808
+12V REGULATOR
50V
16V
• See page 32 for IC Block Diagrams.
Q505, 506
MUTING
0
0
DTC343
50V
0
DTC343
0
50V
U503
HEADPHONE AMP
0.6
50V
0
50V
0
0.6
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
( ) : CD PLAY
< > : TAPE PLAY
23 23
U502
POWER AMP
18.5
50V
0.7
18
1.1
1.1
18
0.7
50V
37.5
8.1
3.6
3.6
HEADPHONE BOARD
7
8
9
4
5
6
1
2
3
H501
PHONES
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
HCD-EP505
Ver 1.1
CN503
4P
+
CN503
R
−
SPEAKER
IMPEDANCE
−
USE 8Ω
L
+
7
(Page 31)
E
POWER
BOARD
CN505
1
7
MAIN
BOARD
(2/3)
(Page 22)
5
1