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2.2 TERMINATING RESISTORS
Terminating resistors are installed on the G9QST logic and servo printed circuit board
(PCB) as shown in Figure 2-2.
TERMINATING RESISTORS
JUMPERS
G9QST LOGIC AND SERVO PCB
DCJC3
CJ~
c:::::3.c] c::J [] 0
[JJ
CJD
~~
CJ
0000
c:::::3
0
0
CJ c:::J
c:::J
o
0
EJ
JPl CPU RESET lONE STEP (JUMPER REMOVED)
~
JP6 FIRST RETRY ONIOFF (RETRY ENABLED)
lOB I
JP8 FAULT (FAULT ENABLED)
Figure 2-2 G9QST Terminating Resistor and Jumper Locations
If
the D2246 drive is connected to the controller in a radial configuration, install a set of
four terminating resistors in place as shown in Figure 2-3. Terminating resistors can be
either 150a or 56
n.
DISK DRIVE CONTROLLER
SG
AO
BO
SG
A1
B1
SG
An
Bn
~~
A
r;-
S~
A
r;-
S~
A
,;-
*TERM
*TERM
*TERM
DISK DRIVE
DISK DRIVE
---
DISK DRIVE
0
1
4
(maximum)
* TERMINATING RESISTORS INSTALLED ON EACH DRIVE
Figure 2-3 Terminating Resistors in Radial System
2-2
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