Texas Instruments 990 Maintenance Manual page 44

990
MAINTENANCE
UNIT
(OPTIONAL)
115 VAC,
50-60HZ,
SINGLE PHASE
(8)1332.47
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L
PROGRAMMERS
PANEL
l/F BOARD
PROGRAMMERS
PANEL
AC
POWER
CONVERTER
-
--,
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9 45128-1
SLOT 1
990/ 1 0
AU2
BOARD
944952
SLOT 2
AUi
BOARD
944932
SLOT 3
ECC BK
MEMORY
CONTROL
BOARD
946655-2
SLOT 4
ADD-ON
MEMORY
BOARD
945093-6
MAIN
SUPPLY
STANDBY
SUPPLY
INTERCONNECT
WIRING IMPLEMENTED
USING ETCH
CIRCUIT BACKPLANE
AND SIX FULL-SIZE
BOARD CONNECTORS
,----,
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990/10 CHASS IS 1- -
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115 VAC
50-60HZ,
SINGLE
PHASE
TTY/EIA
MODULE
I /2 CARD SLOT 6
TTY/EIA
MODULE
945075-1
944960-1
990 POWER
SUPPLY TEST
SET
______
__,
Figure 5-2. Model 990/10 Computer Hot Mock-up System
959372-3
UNIT TEST
OF 990
POWER
SUPPLY
BOARDS
_J
959371-1
733 ASR DATA TERMINAL
945161-1
HALF-SIZE
EXTENDER
BOARD
945071-1
FULL-SIZE
EXTENDER
BOARD
975170-1
COMBINATION
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!Ji.JAL TRACE
/ I 51~~~~(_
MULTIMETER