Read Sony XR-1900 Service Manual online
– 14 –
• Waveform
– MAIN Board –
– MAIN Board –
1
IC1
1
(XIN)
2 Vp-p
222 ns
• IC Block Diagram
– MAIN Board –
– MAIN Board –
IC450
LC75372E
2
1
4
3
6
5
8
7
10
9
12
11
14
13
16
15
15
43
44
41
42
39
40
37
38
35
36
33
34
23
24
25
26
19
20
21
22
29
30
31
32
27
28
17
18
DECODER
LATCH
CONTROL
SHIFT
REGISTER
ROUT
RFIN
RFOUT
RROUT
RVREF
VREF
LVREF
LROUT
LFOUT
LFIN
LOUT
R2
R1
TEST
VSS
NC
CL
DI
CE
L2
VDD
L1
LT3
LT2
L10dBOUT
LT1
LIN
LCT2
LCT1
L10dBIN
LSELO
L3
NC
RT3
RT2
RT1
RIN
R10dBOUT
RCT2
RCT1
R10dBIN
RSELO
NC
R3
+
–
–
+
–
–
+
–
–
+
–
LVREF
LVREF
RVREF
LVREF
LVREF
LVREF
LVREF
LVREF
LVREF
+
–
+
–
+
–
+
–
+
–
+
–
–
RVREF
RVREF
RVREF
RVREF
RVREF
RVREF
RVREF
+
–
–
+
–
–
+
–
–
+
–
–
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