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Texas Instruments 990 Maintenance Manual page 29

Computer 16 lnput/16 output ttl data module

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VI

I

w

990

MAINTENANCE

UNIT

(OPTIONAL)

115 VAC,

50-60HZ,

SINGLE PHASE

(8) I 33247A

I

I

PROGRAMMER

PANEL

l/F BOARD

PROGRAMMER

PANEL

--,

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I

SLOT 1

944952

[

·::~

2

BOARD

944932

SLOT 3

MEMORY

ONTROL

BOARD

~

ECC

BK

946655-2

945093-6

INTERCONNECT

WIRING IMPLEMENTED

USING ETCH

CIRCUIT BACKPLANE

AND SIX FULL-SIZE

BOARD CONNECTORS

,--,

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r-----1·

UNIT

I

UNDER

I

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••

T.:TT~L

:

I

MODULI::

I

--~...._............

I

L __ ::- __ J

1/2 CARD SLOT 6

TTY/EIA

MODULE

945075-1

959372-3

AC

POWER

CONVERTER

SUPPLY

i

MAIN

I

I

_J

,-

- - -

1~

L

945128••1

990/10 CHASS IS

-- -- - I -- .--

---9_4_4_9_6_0_- __ 1 _ _

$TANDBY

I

115 VAC

SUPPLY

!i0-60HZ

I

SINGLE

PHASE

___ J

990 POWER

SUPPLY TEST

SET

UNIT TEST

OF 990

POWER

.SUPPLY

"-----------'BOARDS

Figure 5-2. Model 990/10 Computer Hot Mock-Up System

-1

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.. J

733 ASR DATA TERMINAL

945161-1

HALF-SIZE

EXTENDER

BOARD

945071·-1

FULL-SIZE

EXTENDER

BOARD

975170-1

COMBINA'rlON

DUAL TRACE

·6.<;;~~~(

MULTIMETER

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