Sony HCD-EC55 Service Manual page 48

HCD-EC55/EC77/GX99
Q Q
3 7 6 3 1 5 1 5 0
• Waveforms
– BD90 Board – – PANEL Board –
1 1
IC101 ia (RFI)
(CD PLAY mode)
0.5 to 1.3 Vp-p
200 mV/DIV, 500 ns/DIV 500 mV/DIV, 10 µ s/DIV
2 2
IC101 wf (XO)
(CD PLAY mode)
3.3 Vp-p
59.1 ns
1 V/DIV, 20 ns/DIV 1 V/DIV, 100 ns/DIV
– MAIN Board –
1
IC801 w; (XOUT)
T E
L 1 3 9 4 2 2 9 6 5 1 3
1.5 Vp-p
13.3 µ s
500 mV/DIV, 4 µ s/DIV
w w w
HCD-EC55/EC77/GX99
IC301 qd (X0A)
2.1 Vp-p
30.5 µ s
IC301 od (X0)
2.5 Vp-p
198 ns
x a o
. i
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• IC Block Diagrams
– BD90 Board –
IC201 TK63115SCL-G@GT
VIN 1
GND 2
V REF
ON/OFF
CONTROL
VCONT 3
Q Q
3 7 6
– MAIN Board –
IC602 R2S15904SP
INR3 1
INPUT
INR2 SELECTOR
2
INR1 3
MUTE
INL1 4
MODE
INL2 5 SELECTOR
INPUT
SELECTOR
6
INL3
7
INL4
INPUT
GAIN CONTROL
MUTE
8
IGOUTL
0 - +12dB
/2dB step
VOLUME
9
VOLINL
0 - -89dB.
INPUT
IGOUTR 10
GAIN
CONTROL
0 - +12dB/2dB step
VOLUME
VOLINR 11
0 - -89dB.
u 1 6 3
y
BASSR1
12
BASSR2 13
BASSL1 14
48 48
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2 4
8 9 9
IC401 BA5826SFP-E2
5 VOUT
VO1(-)
1
CH1
VO1(+) 2
IN1 3
THERMAL &
OVER CURRENT
PROTECTION
T.S.D.
REGULATOR,BIAS
DROP
4 NC
100
RESET 4
REGB 5
REGOUT 6
MUTE 7
GND 8
IN2'
9
IN2
10
VO2(+) 11
CH2
VOL(-) 12
3 1 5 1 5 0 8 13 9 2
GND
OPOUT 14
28 INR4
27 LOUT
26 ROUT
25 AGND
24
VCC
REF 23
REFIN
22 DATA
MCU
I/F
21 CLK
20 DGND
19 TRER
m
18 TREL
c o
17 NC
.
16 NC
15
BASSL2
2
8 9 9
28 GND
27
VOL(-)
CH4
LEVEL
26 VOL(+)
SHIFT
LEVEL
13.3K
SHIFT
25 IN4
24 IN4'
23
BIAS
VCC 22 VCC
VCC 21 VCC
20 IN3'
19 IN3
LEVEL
SHIFT
LEVEL
SHIFT
18
VO3(+)
CH3
17 VO3(-)
4 9 8 2 9 16 RESET 9
15 OPIN