Service manual

SERVICE MANUAL MASTER FILE
ENGLISH
Rev. A (1997/05/07)
3-3
Table 3-4 Detector Test Point
Detector Connector
Number
Test Method
(Set Meter to Ohms. Check the
Printer power off.)
Meter Reading
HP Detector
(CN4)
Place one lead on pin 1 and the other
lead on pin 2, and toggle the detector
actuator.
Meter should toggle between
open and short. (LOW: within
CR Home position.)
Front PE Detector
(CN6)
Place one lead on pin 1 and the other
lead on pin 2, and toggle the detector
actuator.
Meter should toggle between
open and short. (HIGH:
paper is installed in the
printer.)
Release Lever Detector
(CN10)
Place one lead on pin 1 and the other
lead on pin 2, and toggle the detector
actuator.
Meter should toggle between
open and short. (HIGH:
Friction Feed mode.)
PG Detector
(CN11)
Place one lead on pin 1 and the other
lead on pin 2, and move the detector
actuator from -0 to 6.
Meter should toggle between
open and short.
(HIGH: PG -1 ~ 3.)
Printhead thermistor Place one lead on pin T and the
other lead on other pin T to check the
resistance.(Refer to Fig.3-2.)
Approx. 14K
Ω
(at 17
°
C)
.1.2 Error
As this printer checks its condition by itself at power-on, when it finds any trouble, it indicates it
with error indication buzzer and LEDs. The error Indications and countermeasures are shown in
the table below:
Error
LED Status Buzzer Cause Disposition
Paper out error Paper Out: On
Pause: On
***
The printer fails to load
paper.
Set paper to the
printer correctly.
Release lever
error
Pause: ON
-----
The release lever is set
to a wrong position.
Set the release
lever to the
correct position.
Fatal error All LEDs : Blink

The carriage unit gets
into out of control or
power supply voltage
becomes incorrect.
Turn off the
printer once and
turn it back on.
Note: Symbols used in the table represent the following:
«
∗
» : A beep sounds for approx. 100 ms with the interval of approx. 100ms.
«-« : A beep sounds for approx. 500 ms with the interval of approx. 100ms.