HP 9020 - Computer Interconnection Diagram

ACMODULE
POWER
SUPPLY
MOTHERBOARD
1/0
BACKPLANE
Theory of Operation 2-3
DISPLAY
-,
_
-J).--~"" ___ --IIJ---""""P81C(4) P81A J42(12)
P81B J43(70)
P82A J46
(36)
(50)P1
(SO)P2
(80)P3
(80)P4
(80)P5
(80)P6
(60)P7
(60)P8
(60)P9
I UPT04110 CARDS
NOTE
P82B J47 (50)
P83A J45(50)
P83B J44
(24)
PROCESSOR
STACK
J48(25)
(96)J40 J12
(70)P10
(70)P11
(50)P13
(2)P14
1 RESERVED FOR EXPANSION
}
CONTROLLER CARD(S) ANDIOR
BOOTSTRAP
LOADER CARD
RESERVED
FOR EXPANSION
1/0 DOOR INTERLOCK
r- POWER SUPPLY FAN
(7) J52 t-- ....... ....-I/O CARD CAGE FAN
L- PROCESSOR STACK FAN
FLEXIBLE DISC DRIVE
(8) J531----t!
FIXED DISC DRIVE
J49(25) (8)J54t------------f
J50 (50) J51 (50)
I~ __ ~A~____ ~ I~----~\
V V \
J3 (50) J5 (50) C (50) PC (50)
TB (14) 1----1
NUMBER IN PARENTHESIS IS
NUMBER OF PINS PER CONNECTOR
PRINTER KEYBOARD
Figure 2-2. Computer Interconnection Diagram
OPTIONAL
INPUT DEVICE