Sony XR-1790, Service Manual, Page: 21 / 36

– 25 –
• IC Block Diagram
– MAIN Board –
IC450 LC75372E
2 1 4 3 6 5 8 7 10 9
12
11
14
13
16
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
+
–
+
–
+
– +
–