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XR-1800/1803/1804
5-4. SCHEMATIC DIAGRAM ­ MAIN Section (1/2) ­ · See page 16 for Waveform.

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XR-1800/1803/1804
5-5. SCHEMATIC DIAGRAM ­ MAIN Section (2/2) ­ · See page 27 for IC Block Diagram.

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XR-1800/1803/1804
5-6. PRINTED WIRING BOARD ­ PANEL Section ­

· Semiconductor Location
Ref. No. Location B-9 C-10 C-7 C-6 C-8 B-9 D4 D900 D901 D902 D903 IC900

5-7. SCHEMATIC DIAGRAM ­ PANEL Section ­

· Waveform
2 IC900 #TM (OSC)

2.2 Vp-p

15 µs

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· IC Block Diagram ­ MAIN Board ­ IC450
R10dBOUT RCT2 RT1 RCT1 RT2 R10dBIN RSELO RT3

LC75372E

RIN

33 31 29 28 26 25 24 23

32 30

27

ROUT 34 RVREF RVREF + ­ + ­ 20 TEST + ­ RVREF 19 VSS 18 NC RROUT 37 LATCH DECODER RVREF RVREF 38 VREF 39 LVREF 40 LVREF LROUT 41 + ­ LVREF + ­ + ­ RVREF SHIFT REGISTER CONTROL 17 CL 16 DI 15 CE + ­ RVREF 22 R2 21 R1 RVREF + ­ RVREF

RFIN 35 RFOUT 36

LFOUT 42 LVREF LVREF 14 VDD LFIN 43 + ­ + ­ + ­ 13 L1 12 L2 LVREF

LVREF LVREF LOUT 44 + ­ LVREF

1 2 4 5 7

3

6

8 9

10 11

LT2

LT1

L10dBIN LSELO

LIN

L10dBOUT

LCT2

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LCT1

LT3

L3 NC

R3 NC

+ ­

+ ­