Sony HCD-EH25 - SCHEMATIC DIAGRAM - MAIN Board (3;3)

HCD-EH25/EH26
HCD-EH25/EH26
2323
• See page 27 for IC Block Diagrams.
7-11. SCHEMATIC DIAGRAM - MAIN Board (3/3) -
R452
R453
C457 C458
C455
R451
C456
C452
C451
C453
C454
IC451IC452
10k
100
100
16V
0.1
0.1
10k
0.1
1
50V
1
50V
1
50V
1
50V
NJM2521MNJM2521M
A-GND
+9V
USB-L
USB-R
CD-L
CD-R
AU-SW
AU-L
AU-R
(3/3)
SWITCH
AUDIO SELECT
SWITCH
AUDIO SELECT
GND
VOUT
V+
VIN3
VIN1
SW1
VIN2
SW2
GND
VOUT
V+
VIN3
VIN1
SW1
VIN2
SW2
(Page 22)
(Page 22)
(Page 22)
• Waveforms
– CD Board –

IC101 JB (RFi)
(CD play mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p

IC101 XG (XO)
(CD play mode)
1 V/DIV, 20 ns/DIV
59.1 ns
14.6 Ms
3.3 Vp-p
RG
Q507 (Collector)
(Tape REC mode)
(Tape REC mode)
5 V/DIV, 10 Ms/DIV
9.8 Vp-p
RB
IC801 X (XOUT)
1 V/DIV, 10 μs/DIV
13.4 μs
1.2 Vp-p
RT
IC861 RG (XOUT)
2 V/DIV, 100 ns/DIV
230 ns
5 Vp-p
FB
IC701 RG (X3)
1 V/DIV, 10 μs/DIV
30.4 μs
3 Vp-p
FT
IC701 PT (X1)
2 V/DIV, 100 ns/DIV
181 ns
3.2 Vp-p
RE
Q507 (Base)
2 V/DIV, 10 μs/DIV
14.6 μs
4.3 Vp-p
XB
IC101 SB (XOUT_PLL)
1 V/DIV, 20 ns/DIV
59 ns
2.1 Vp-p
– MAIN Board – – PANEL Board –
– USB Board –
jomi