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HCD-GSX75
44
44
• Waveforms
– CD Board –
– MAIN Board –
– DISPLAY Board –
0.96Vp-p
1
IC101
t;
(RFAC)
(CD Play Mode)
2
IC101
el
(FE)
(CD Play Mode)
200mV/DIV, 1
µ
s
/DIV
100mV/DIV, 200
µ
s
/DIV
100mV/DIV, 200
µ
s
/DIV
0.5V/DIV, 20ns/DIV
250mVp-p
470mVp-p
3
IC101
ra
(TE)
(CD Play Mode)
4
IC104
yd
(XI)
1.2Vp-p
16.9MHz
0.5V/DIV, 40ns/DIV
5
IC801
qd
(XOUT)
16MHz
1.7Vp-p
1V/DIV, 100ns/DIV
6
IC701
id
(X1)
3.8Vp-p
4MHz
7-19. IC Block Diagrams
RW/ROM
RW/ROM
EQ ON/OFF
VOFST
VOFST
DVC
VC
VC
VC
RW/ROM
VC
DVC
30
29
28
+
–
+
–
DVC
VCC
DVC
27
26
25
24
RW/ROM
EQ
23
22
21
20
19
RFAC
VCA
VCC
+
–
DVC
+
–
+
–
RW/ROM
VC
RW/ROM
DVC
+
–
3
A
B
C
D
B
C
A
A
A
B
C
D
B
C D
D
+
–
1
2
APC AMP
5
6
7
8
9
4
RFAC
SUMMING
AMP
RW/ROM
APC-OFF
(Hi-Z)
RW/ROM
(H/L)
VOFST
VC
RW/ROM
+
–
10
11
GM
GM
18
17
16
B
D
A
C
13
14
15
12
EQ IN
LD
PD
GND
A
B
C
D
AC SUM
E
F
DVCC
DVC
RFAC
SW
DC OFST
RFDCI
RFDCO
VC
RFC
VFC
BST
RFG
VCC
CEI
CE
TE BAL
TE
FEI
FE
– CD Board –
IC103 CXA2581N-T4