HP 9020 - Voltage Sensing Diagram

2-10 Theory of Operation
B
POWER SUPPLY
MODULE
ASSEMBLY
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PROCESSOR
STACK
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INPUT
DEVICE
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V
MOTHERBOARD
V
V
PRINTER
KEYBOARD
B
-12
MASS
STORAGE
#1
I/O
BACKPLANE
MASS
STORAGE
CONTROL
MASS
STORAGE
#2
NOTES
DISPLAY
CS5
+ 5 VOLT CONTROL SENSE
CS-12G
= - 12 VOLT GROUND CONTROL SENSE
~
= CONNECTIONTOGROUNDPLANE
CS5
+ 5 = CONNECTION OF + 5 VOLT CONTROL
SENSE OF
+ 5 POWER LINE.
Figure 2-5. Voltage Sensing Diagram