Sony HCD-EC55 Service Manual page 48

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