HP 7942 Service Manual page 63

HOST
COMPUTER
DATA/CONTROL
INTERFACE
BUS
(DC-IB)
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HOST DEPENDENT CONTROLLER
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(PCA-A5)
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H P - [ 8 ....
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INTERFACE
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SELF TEST
SWITCHES
&
DISPLAY
_______
~----------~--------------C-ON-TA"-O-l/~ST-A-TU-S-DA-T-A-aU-s------~,+_--+r_r~
~~~~I/
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CONTROL/sa TUS ADDRESS aus
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SUPPLY
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ASS E M B L Y
POWER ON RESET
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CONTROLLER
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(UNIT 1. PCA-A2j
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MICRO-
COMPUTER
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DEPENDENT
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CONTROLLER
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(UNIT 0, PCA-A2j
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DIS C
CONTROLLER
14----,.-.1
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CONTROL
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FAULT/
ON LINE
INDICATOR