XR-1800/1803/1804
5-4. SCHEMATIC DIAGRAM  MAIN Section (1/2)  " See page 16 for Waveform.
 19   20 
XR-1800/1803/1804
5-5. SCHEMATIC DIAGRAM  MAIN Section (2/2)  " See page 27 for IC Block Diagram.
 21   22 
XR-1800/1803/1804
5-6. PRINTED WIRING BOARD  PANEL Section 
" Semiconductor
Location
Ref. No. Location
D4 B-9
5-7. SCHEMATIC DIAGRAM  PANEL Section 
D900 C-10
D901 C-7
D902 C-6
D903 C-8
IC900 B-9
" Waveform
2 IC900 #"! (OSC)
2.2 Vp-p
15 µs
 23   24 
" IC Block Diagram  MAIN Board 
IC450 LC75372E
33 32 31 30 29 28 27 26 25 24 23
ROUT 34
RVREF RVREF
RVREF
RVREF
22 R2
21 R1
RFIN 35 20 TEST
RVREF RVREF
RFOUT 36 19 VSS
18 NC
RROUT 37
17 CL
SHIFT
LATCH DECODER CONTROL 16 DI
REGISTER
RVREF
15 CE
RVREF 38
VREF 39
+
RVREF
LVREF 40

LVREF
+
LVREF
LROUT 41

LFOUT 42
LVREF LVREF
14 VDD
LFIN 43
13 L1
12 L2
LVREF
LVREF
LVREF LVREF
LOUT 44
1 2 3 4 5 6 7 8 9 10 11
 25 
NC
RIN
R10dBOUT
R10dBIN
RT3
RT2
RCT2
RCT1
RSELO
RT1
R3
L3
NC
LIN
LT2
LT1
LT3
LCT2
LCT1
LSELO
L10dBIN
L10dBOUT

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