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PRINTER 3000 304 995 - 01
6 September 2005
Block Diagram
Laser Diode Unit
PRINTER MODEL-L1
Laser Diode
Driver
Laser Diode
SERVICE MANUAL
Laser
Synchronization
Detector
The Engine Board controls the laser diode power (APCSH) and transfers data for
printing to the laser diode (VIDEO). As an electrical safety feature, there is an
interlock switch on the Engine Board. This switch cuts +24 volts whenever the front
door is opened.
Error Conditions
Laser Error
The machine detects laser synchronization signal pulses (PGSYCI) 70 milliseconds
after the (LDENA) signal is sent. It detects a laser error if the pulse count does not
reach the specified number within 400 milliseconds.
When this occurs, the machine warns the customer on the LCD panel (Error 56).
Polygon Mirror Motor Error
The machine detects a polygon mirror motor error when the (PMLOK) signal does
not go low within 3.5 seconds of the (PMENA) signal. When this occurs, the
machine warns the customer on the LCD panel (Error 57).
（
G191
Polygon Mirror
Motor Unit
Polygon Mirror
Motor Driver
TECHNICAL DOCUMENT
エラー! スタイルが定義されていません。
+5V
VIDEO
LDENA
APCSH
PGSYCI
）
+24VD
PMENA
PMCLK
PMLOK
1-5
i
Engine Board
Regulator
Interlock Switch
+24V
Power
Supply
Unit
G182D012.WMF
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