Epson AcuLaser C8500, Service Manual

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EPSON AcuLaser C8500 Revision C
Chapter 4 Diagnostics 4-6
“P/J 132”and “P/J 211” are connectors for the Printer and the
Option Feeder connection.
Figure 4-3. DIAG Tool configuration
4.2.1.2 Overview of the Diagnostic Commander
The diagnostic commander has mainly diagnostics function and
FIRMWARE download function. The diagnostic function is a tool which
controls the printer by communicating the data (commands and
statuses) with the MCU PWB instead of the printer controller
(CONTROLLER PWB.)
During the execution of diagnostics, commands related to the
diagnostics are sent. The diagnostics commander also supports
commands besides diagnostics and statuses and can perform
communications.
The FIRMWARE download function is a tool which downloads a new
FIRMWARE to up date the engine control program housing to flash
ROM on MCU PWB.
4.2.1.3 Overview of the DIAG. PWB
This circuit board is equipped with a connector with the MCU PWB, a
connector with DIAG HARNESS, a connector with RS-232C cable (D-
Sub 25 pin female and 2 D-Sub 9 pin females, 4 dip switches).
Figure 4-4. DIAG PWB
Table 4-2. Dip Switch Functions
Dip-Switch
Initial
Setting Description
1 ON For switching the type of RS-232C cable
(ON : All strikes rate line cable,
OFF : Strike rate CTC/RTS inside folding cable)
2 OFF Switching by the difference in the connection composition
(ON: At the time of the option connector connection,
OFF: At the time of direct connection with MCU PWB)
3 OFF For the test print of the device simple substance.
(It can be used in the same way as Dip-Switch on MCU
PWB.)
(ON : Test print start, OFF : Test print stop)
4 OFF Switching by the difference in the connection composition
(ON: At the time of the option connector connection,
OFF: At the time of direct connection with MCU PWB)