Lexmark WinWriter 150c, Service Manual

Page: 26 / 80

17
4077-001
Transport Service Check
FRU Action
1 Transport Motor Check the motor for binds, or loose motor pulley.
Disconnect the transport motor (J6) from the
system board. Check for 8 to 18 ohms between
pins 2 and 3 on the motor cable. If the reading is
incorrect, replace the motor.
Check for motor pins shorted to the motor housing.
If you find a pin shorted to the housing, replace the
motor. If the failure remains, replace the system
board.
2 System Board Turn the printer off and disconnect J6 from the
system board. Turn the printer on and check for a
pulse of 6 to 8 V dc between J6-2 and ground and
between J6-3 and ground on the system board as
the machine goes through POST.
3 Carrier Guide Rod Clean the carrier rod.
Note: Do not lubricate the rod or the carrier rod
bearing surface.
4 Transport Belt
Idler Pulley Parts
Carrier Frame Check for worn, loose or broken parts. Check for
obstructions blocking carrier movement.
Carrier to carrier frame engagement should be
lubricated with grease P/N 1329301.
5 Encoder Strip Check for wear and dirt.
6 Printhead Cable Be sure connector J4 is fully seated. Check the
cable for damage.
7 Encoder Strip
Printhead Cable
Encoder Card
System Board Perform the
“Encoder Sensor Test” on
page 21
. If you cannot enter the test, replace the
system board.
8 Maintenance
Station A problem with the maintenance station can cause
carrier movement problems at the right margin. Go
to the
“Maintenance Station Service Check”
on page 9
.