Main Wire Harness Test Tables - Printronix P7000 Series Maintenance Manual

Appendix A

Main Wire Harness Test Tables

P106 Connector
19 17 15 13 11 9
POD CCF
PMD LRP
20 18 16 14 12 10
Resistance
Device P106 Pins
7.2 - 8.8 Ω
LRIB M 2, 4 and 6,8
1.35 - 1.65 Ω
PLAT M 1, 3 and 5, 7
LRP 10, 12 Open across pins
Short across post
CCF 9, 11 4.6 KΩ
8 Meg Ω
PMD 14, 16
18, 20 Open
8 Meg Ω
POD 13, 15
17, 19 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)
J106
MOTOR NOTES:
All Motors: 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 P20Q printer, 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.
398
Connectors are viewed
from the top, as seen
7 5 3 1 when plugged into the
controller board. For
PLAT M connector assembly and
disassembly, see page
274.
LRIB M
8 6 4 2
Pin No.
Normal Device
RRIB M
PAPR M
HBF
EHF
RRP
PLO
CVO
MPU
J107
P107 Connector
19 17 15 13 11 9 7 5 3 1
MPU PLO EHF* PAPR M
CVO RRP HBF RRIB M
20 18 16 14 12 10 8 6 4 2
Resistance
P107 Pins
7.2 - 8.8 Ω
2, 4 and 6,8
0.417 - 0.681 Ω
1, 3 and 5, 7
10, 12 2.7 KΩ
9, 11 4.6 KΩ
14, 16 Open across pins
Short across post
13, 15 Continuity: switch closed
Open: switch open
18, 20 Continuity: switch closed
Open: switch open
670 Ω
17, 19
CVO = Cover Open Switch (not installed)
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
Normal