Diagnostic Commander; Diagnostic Pwb - Epson ColorPage EPL-C8200 Service Manual

EPSON ColorPage EPL-C8200

4.2.1.2 Diagnostic Commander

The Diagnostic Commander takes the place of the Printer Controller
(CONTROLLER PWB) and controls the printer by sending and
receiving the data (commands and status) which is exchanged between
the CONTROLLER PWB and MCU PWB.
The Diagnostic Commander sends a diagnostic command to run the
diagnostics. The Diagnostic Commander can also send/receive a
command and status that are not the part of the diagnostics.
Chapter 4 Diagnostics

4.2.1.3 Diagnostic PWB

The following components are mounted on the Diagnostic PWB:
 Connector to the MCU PWB.
 RS-232C cable connector (D-sub 25-pin female/D-sub 9-pin
female), DIP-Switches (6), LEDs (3)

DIP-Switch functions
Table 4-2. DIP-SWITCH Function
DIP-Switch Default
1 ON /CRDY signal (Do not change.)
RS-232C cable type
2 ON
(ON: Straight cable/OFF: Cross cable)
RS-232C cable type
3 OFF
(ON: Cross cable/OFF: Straight cable)
RS-232C cable type
4 OFF
(ON: Cross cable/OFF: Straight cable)
RS-232C cable type
5 ON
(ON: Straight cable/OFF: Cross cable)
Off-line test print
(ON: Start the test print/OFF: Stop the test print.) (You
can set this switch similarly to the JP3* on MCU
6 OFF
PWB.)
* Close = DIP-switch: ON, Open = DIP-SWITCH: OFF

LED functions
The LEDs indicate the following signal.
LED
CR1
CR2
CR3
Revision A
Description
Table 4-3.
Description
/VSYNC signal
/READY signal
/HSYNC signal
4-4