Epson AcuLaser C8500, Service Manual

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EPSON AcuLaser C8500 Revision C
Chapter 4 Diagnostics 4-35
VDENB 44 ROS ASSY -
Set MCU PWB inside
signal (LDENB) to High.
THSEL 46 MCU PWB -
Set MCU PWB inside
signal (sermister
breakage detection
signal) to Low.
HR_LAMP
_SSR
47 H/R HEATER, P/R
HEATER Check the H/R
HEATER and P/R
HEATER light up.
[Turn it off
automatically in
0.12msec rest.]
Set HEATER ON signal
to Low.
CNTR_RST 4C MCU PWB -
Set MCU PWB inside
signal (Watch dog timer
cancel signal) to Low.
PH2_MOT
_SPEED
52 Not used. -
PH_MOT 53 FUSER MOTOR ASSY,
P/H MOTOR ASSY <WARNING>
<CAUTION>
Check the rotation of
two motors.
(It rotates in standard
speed unless a code
[57], [62] are
executed.)
Set FUSER-P/H
MOTOR ON signal to
Low.
Table 4-10. Digital Output Test Device Code
Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]
Code Function Item
Name (Hex)
When status data is
[High] Check Method
MAIN_MOT 54 PROCEASS DRIVE
ASSY <WARNING>
<CAUTION>
Check the rotation of
the motor.
(It rotates in standard
speed unless
DIAGSTOP is
executed with the
code [00], [06].)
Set PROCESS MOTOR
ON signal to Low.
DISPENCE
_MOT
56 DISPNESE CLUTCH
ASSY <CAUTION>
Check by operational
sound that the clutch is
operating.
Set DISPNESE
CLUTCH ON signal to
Low.
PH_MOT
_SPEED0
57 FUSER MOTOR ASSY,
P/H MOTOR ASSY <WARNING>
<CAUTION>
Check by the change
in operational sound or
visually that the
rotation of two motors
goes to medium speed
(one half speed).
(During executing with
code [53], executing
this code changes the
FUSER MOTOR
ASSY and the P/H
MOTOR ASSY to one
half speed.)
Set FUSER-P/H
MOTOR SPEED0
signal to Low.
Table 4-10. Digital Output Test Device Code
Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]
Code Function Item
Name (Hex)
When status data is
[High] Check Method