268
Main Wire Harness Test Tables, PSA3 Controller Board
MOTOR NOTES:
All Motors: Let the motor cool to room
temperature before you test it. Use the
table values to test for winding continuity
and for no shorts between winding and the
motor frame. Rotate the motor by hand and
test for shorts; replace the motor if you find
any shorts.
Shuttle Motor = approx. 0.7 - 0.8 Ω per
phase, except for the 6500-v20, which
shows 0.42 Ω per phase. Use this value to
test for winding continuity and for no shorts
between windings and the motor frame.
Rotate the motor by hand and test for
shorts; replace the shuttle frame assembly
if you find any shorts
All fans have brushless DC motors
powered by solid-state circuits and
controlled by feedback from a fan rotor
position Hall Effect sensor. Fans driven by
+48V measure 4 - 5 KΩ. Fans driven by
+24V measure 2 - 3 KΩ. A very low reading
can mean one of the winding drive
transistors is shorted. An open circuit could
indicate defective fan electronics or an
open cable. Fans will run whenever +48V
is present; failure to run can mean a
defective cable, connector, or current
sense resistor on the controller board. An
open circuit current sense resistor (on the
controller board) will prevent the fan from
running but will not allow software to detect
the fault.
Device P106 Pins Normal
LRIB M 2, 4 and 6,8 7.2 - 8.8 Ω
PLAT M 1, 3 and 5, 7 1.35 - 1.65 Ω
LRP 10, 12 Open across pins
Short across post
CCF 9, 11 4.6 KΩ
PMD 14, 16
18, 20
8 Meg Ω
Open
POD 13, 15
17, 19
8 Meg Ω
Open
CCF = Card Cage Fan
LRIB M = Left Ribbon Motor
LRP = Left Ribbon Guide
PLAT M = Platen Open Motor
PMD = Paper Motion Detector (Switch)
POD = Paper Out Detect (Switch)
8 6 4 2
7 5 3 1
12 1020 18 16 14
11 919 17 15 13
LRIB M
PLAT M
LRP
CCF
PMD
POD
Pin No.
7 5 3 115 1319 17
RRIB M
PAPR M
HBF
EHF*
CVO
MPU
RRP
PLO
CVO = Cover Open Switch
EHF* = Exhaust Fan
HBF = Hammer Bank Fan
MPU = Magnetic Pickup
PAPR M = Paper Feed Motor
PLO = Platen Open (Switch)
RRIB M = Right Ribbon Motor
RRP = Right Ribbon Guide
* JMP on pedestal models, used as a spacer
Device P107 Pins Normal
RRIB M 2, 4 and 6,8 7.2 - 8.8 Ω
PAPR M 1, 3 and 5, 7 0.417 - 0.681 Ω
HBF 10, 12 2.7 KΩ
EHF 9, 11 4.6 KΩ
RRP 14, 16 Open across pins
Short across post
PLO 13, 15 Continuity: switch closed
Open: switch open
CVO 18, 20 Continuity: switch closed
Open: switch open
MPU 17, 19 670 Ω
P106 Connector P107 Connector
Resistance
Resistance
11 9
8 6 4 216 1420 18 12 10
Connectors are viewed
from the top, as seen
when plugged into the
controller board.
J106 J107
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