Intermec ColorCoder V4 – Service Manual Ed. 1
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Chapter 2 Operation and Timing
2.4 Pick Up/Feeder System, cont'd.
2.4:E Checking for Paper Errors
Outline
To check if the paper is moving normally, signals from the sensors
are read at such times as instructed by the microprocessor.
When the microprocessor identifies a jam, the ongoing printing
operation is suspended immediately and the printer is stopped.
After the printer stops, [CHK. PAPER: MID] or [NO PAPER FED]
message is indicated on the operation panel and the error lamp lights
up.
The microprocessor identifies the following conditions as paper
error.
Basic Operation Sequence of Checking for Paper Error
The basic operation sequence of checking for paper error is shown
below.
Paper feed error
When the paper is not fed to the TOF sensor within a specified time
after print starting.
1. Paper feed error at the pick up assembly: When the TOF mark
of the paper does not reach the TOF inlet sensor within a
specified time after print starting.
[CHK. PAPER: MID] : When first sheet of paper is at the TOF
inlet sensor.
[NO PAPER FED] : When the first sheet of paper is not at the
TOF inlet sensor.
2. Paper feed error at the delivery assembly: When the TOF mark
of the paper does not reach the TOF outlet sensor within a
specified time after the TOF inlet sensor detect the TOF mark.
WAIT
Normal condition
PWR ON PRINT START
Paper feed motor
Inlet TOF sensor
1.6sec
WAIT
Abnormal condition
PWR ON PRINT START
1.6sec
ERROR
Abnormal
WAIT
Normal condition
PWR ON PRINT START
Paper feed motor
Inlet TOF sensor
1.3sec
WAIT
Abnormal condition
PWR ON PRINT START
ERROR
1.3sec
Abnormal
TOF outlet sensor or
cutter TOF sensor