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Texas Instruments 990 Maintenance Manual page 43

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990

MAINTENANCE

UNIT

115 VAC,

SINGl~-~~~~E

(B)t 33246

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PROGRAMMERS

PANEL

l/F BOARD

PROGRAMMERS

PANEL

AC

POWER

CONVERTER

--,

I

9451 20-1

CAFID SLOT 1

990/A

MICROCOMPUTER

BOARD

WITH AK

RAM MEMORY

AND LOADER

AND DIAGNOSTIC

ROMS

--r-=MAIN

LUPPLY

STANDBY

SUPPLY

INTERCONNECT

WIRING IMl"LEMENTED

USING ETCH

CIRCUIT BACKPLANE

AND SIX FULL-SIZE

BOARD CC>NNECTORS

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TT'r'/EIA

MODULE

1 /2 CARD SLOT 6

TTY/EIA

MODULE

945075-· 1

CARD SLOT 2

M~t

0

6~Y

EXPANDER

BOARD

944935-10

990/4 CHASSIS

--,

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_J

944960--1

990 POWER

SUPPLY TEST

SET

Figure 5 .. 1. Model 990/4 Computer Hot Mock-up System

P2

- - --1

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ff RS-232C EIA

DATA TERMINAL

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P1

2265151* ........__ _ _ _

~

----1

1

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- -

959372-3

1

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959371-1

733 ASR DATA TERMINAL

945161-1

(20K W/WRITE

PROTECT)

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HALF-SIZE

EXTENDER

BOARD

I

_ _J

UNIT TEST

OF 990

POWER SUPPLY

BOARDS

ff THIS CABLE AND DATA

945071-

t

FULL-SIZE

EXTENDER

BOARD

975170-1

COMBINATION

DUAL TRACE

~I~~~~(

MULTIMETER

TERMINAL ARE ONLY REQUIRED TO

RUN REME IA DIAGNOSTIC ON KITS

2265150-0001/0002

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