Checking For Paper Errors - Intermec ColorCoder V4 Service Manual

2.4 Pick Up/Feeder System, cont'd.
2.4:E Checking for Paper Errors
Intermec ColorCoder V4 – Service Manual Ed. 1
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.
Normal condition
PWR ON PRINT START
WAIT
Paper feed motor
Inlet TOF sensor
1.6sec
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.
Normal condition
PWR ON PRINT START
WAIT
Paper feed motor
Inlet TOF sensor
TOF outlet sensor or
cutter TOF sensor
Chapter 2 Operation and Timing
PWR ON PRINT START
PRINT WAIT
PWR ON PRINT START
PRINT WAIT
1.3sec
Abnormal condition
PRINT ERROR
Abnormal
1.6sec
Abnormal condition
PRINT ERROR
Abnormal
1.3sec
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