Sony CDX-747X Service Manual page 28

CDX-747X
Q Q
3 7 6 3 1 5 1 5 0
• Waveforms
– RF Board – – MAIN Board –
1 IC101 qh (FE) (CD play mode) 1 IC101 rd (MDP) (CD play mode)
Approx.
100 mVp-p
2 IC101 qk (TE) (CD play mode) 2 IC101 ih (LRCK), IC501 1 (LRCK)
(CD play mode)
Approx.
250 mVp-p
T E
L 1 3 9 4 2 2 9 6 5 1 3
3 IC101 qg (RFAC) (CD play mode) 3 IC101 o; (BCK), IC501 3 (BCK)
(CD play mode)
1.4 ± 0.3 Vp-p
472 ns
4 IC101 od (XTAI), IC501 4 (CLKO)
(CD play mode)
w w w
5 IC201 ia (X1) (CD play mode)
2 Vp-p
3.8 µ s
250 ns
6 IC501 6 (XTO) (CD play mode)
4.5 Vp-p
59.1 ns
22.7 µ s
4.7 Vp-p
5.4 Vp-p
59.1 ns
x a o
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• IC Block Diagrams
–RF Board –
IC101 CXA2581N-T4
3.9 Vp-p
DVC –
VOFST
+
VC
VC
LD 1
PD 2 APC AMP
6.2 Vp-p
EQ IN 3
RFAC
AC SUM 4 SUMMING
AMP
GND 5
B C D
A
A
A 6
Q Q B
B 7
3 7 6
C
C 8
D
D 9
E 10 GM
F 11 GM
APC-OFF
(Hi-Z)
SW 12
RW/ROM
(H/L)
DVCC 13
B
DVC
D
DVC 14 A
C
RFAC 15
u 1 6 3
y
28 28
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2 4
8 9 9
RW/ROM
30 DC OFST
29 RFDCI
A
–
–
B
+
28 RFDCO
+
C
DVC
D
DVC
VCC
VC
RW/ROM
27 VC
26 RFC
EQ 25 VFC
24 BST
EQ ON/OFF
RFAC
23 RFG
VCA
RW/ROM
VCC 22 VCC
VOFST 21 CEI
B
C
–
–
A
+
20 CE
+
D
DVC
VC
3 1 5 1 5 0 8 9 2
RW/ROM
19 TE BAL
RW/ROM
–
18 TE
+
VC
RW/ROM
RW/ROM
17 FEI
VOFST
–
–
+
16 FE
+
DVC
VC
RW/ROM
m
c o
.
2
8 9 9
4 9 8 2 9 9