Sony CDX-747X Service Manual ▷ View online
CDX-747X
25
25
SUB
BOARD
TP6
7-9.
SCHEMATIC DIAGRAM – MAIN Board (2/3) –
•
See page 28 for Waveform.
•
See page 28 for IC Block Diagram.
(Page 24)
(Page 26)
Ver 1.1 2001.05
(Page 26)
CDX-747X
26
26
SUB BOARD
(NOT SUPPLIED: See page 3)
7-10.
SCHEMATIC DIAGRAM – MAIN (3/3)/SWITCH Boards –
•
See page 28 for Waveforms.
•
See page 28 for IC Block Diagrams.
(Page 24)
(Page 25)
(Page 27)
Ver 1.1 2001.05
(Page 25)
CDX-747X
27
27
D902
D901
PS901
CNJ901
C904
C901
C902
FB902
FB903
FB901
1-679-418-
11
(11)
B
MAIN BOARD
CN301
JACK FLEXIBLE
BOARD
CN901
AUDIO OUT
L
R
4
5
1
2
3
8
6
7
5
4
8
7
6
2
1
3
CONTROL
(FOR SONY BUS)
7-11.
PRINTED WIRING BOARDS – JACK Board –
•
See page 19 for Circuit Boards Location.
7-12.
SCHEMATIC DIAGRAM – JACK Board –
(Page 22)
(Page 26)
CDX-747X
28
28
1.4
±
0.3 Vp-p
• Waveforms
– RF Board –
– RF Board –
1
IC101
qh
(FE) (CD play mode)
1
IC101
rd
(MDP) (CD play mode)
5
IC201
ia
(X1) (CD play mode)
2
IC101
qk
(TE) (CD play mode)
2
IC101
ih
(LRCK), IC501
1
(LRCK)
(CD play mode)
6
IC501
6
(XTO) (CD play mode)
3
IC101
qg
(RFAC) (CD play mode)
3
IC101
o;
(BCK), IC501
3
(BCK)
(CD play mode)
4
IC101
od
(XTAI), IC501
4
(CLKO)
(CD play mode)
– MAIN Board –
Approx.
100 mVp-p
100 mVp-p
2 Vp-p
3.8
µ
s
Approx.
250 mVp-p
250 mVp-p
4.5 Vp-p
22.7
µ
s
4.7 Vp-p
472 ns
5.4 Vp-p
59.1 ns
3.9 Vp-p
250 ns
6.2 Vp-p
59.1 ns
• IC Block Diagrams
–RF Board –
–RF Board –
IC101
CXA2581N-T4
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
C
A
A
A
B
C
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
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