Black Mark Sensor Adjustment - TEC B-670 Series Maintenance Manual

6. DIAG. TEST OPERATION
6.5.2

Black Mark Sensor Adjustment

Black mark sensor setting should be performed after replacing the CPU PC board or changing the
tag paper to another maker's, or when a paper feed error occurs. The black mark sensor has a
movable and a fixed mode. These are selected by the DIP switch.
After changing the black mark sensor type, follow the procedure below to make an adjustment.
< 1
< 4
Press the [FEED] key
and [RESTART] key at
the same time.
[ R
Ex)
[ R
NOTES:
Power off
Turn on the power while holding down
the [FEED] key and [PAUSE] key.
> D I A G N O S T I C
Press the [FEED] key three times.
> S E N S O R A D J U S T M E N T
Press the [PAUSE] key twice.
E F L E C T I V E ]
Set the tag paper so that the black mark
sensor can detect the white part of the
tag paper. (See NOTE 1.)
Holding the [FEED] key or [RESTART]
key down until an asterisk ( * ) is
displayed. (More than 3 seconds.)
E F L E C T I V E ]
Verify that the voltage difference
between a black mark and a white part
is more than 1.5 V. (See NOTE 3)
1. Make sure to adjust the black mark sensor using the white part of the tag paper as
a criterion. Though an adjustment can be performed with the black mark, it may
cause a paper jam error.
2. Pressing the [PAUSE] key validates the sensor adjustment. The value of the
sensor is displayed up to 5.0 V.
3. When the difference is less than 1.5 V, used media may be improper (unspecified),
or sensitivity may be dull due to an excessively old or dirty sensor. In this case
change the media to one specified, or replace or clean the sensor. Then re-adjust
the black mark sensor.
V 1 . O A
2 . 8 V
3 . 8 V *
Press the [PAUSE] key for Feed Gap Sensor Adjustment.
6-50
6.5 SENSOR SETTING MODE
The former value is displayed.
Black Mark
White part
Black Mark Sensor
Align the white part of the TOSHIBA TEC
specified tag paper with the black
mark sensor. (See NOTE 2.)
Indicates adjustment complete.
EM18-33017
Tag paper
Black Mark