Epson ColorPage EPL-C8000, Service Manual

Page: 289 / 545

EPSON EPL-C8000 Rev. B
Chapter 4 DIAGNOSTICS 4-19
4.2.6 Executing Diagnostics
4.2.6.1 Diagnostic execution steps
Run the diagnostics by sending the following command using the
command transmission function in the Diagnostic Commander.
1. Send the DIAGON command (75h) to go into the DIAG TEST mode
where you can run the diagnostics. (The DIAGON command is one
of the Printing/Status Control Command Class commands.)
2. Set the parameters in the DIAGSTART command (90h) and send
the command to run the diagnostics. (The DIAGSTART command is
one of the Diagnostics Control Command Class commands.) By
setting a diagnostic code as a parameter, you can run various
diagnostics.
3. Set the parameters in the DIAGSTOP command (91h) and send the
command to stop the diagnostics. (The DIAGSTOP command is
one of the Diagnostics Control Command Class commands.)
4. Send the DIAGOFF command (76h) to exit the DIAG TEST mode.
(The DIAGOFF command is a Printing/Status Control command
class command.)
4.2.6.2 Diagnostics functions
There are a total of 8 diagnostic functions (9 if you include the
diagnostics stop function).
Table 4-11. Diagnostics Functions
Parameter
(HEX)
Diagnostic
function
Description
00 Test Print Sets the parameters for the built-in test print.
01 Digital Input Test
Input test to check the sensors and switches
that have digital signals.
02 Digital Output Test
Output test to check the digital components
(e.g., motor, solenoid, etc.) that are controlled
by the digital signals.
03 Analog Input Test
Input test to check the sensor and output
monitor that has an analog signal.
04 Analog Output Test
Output test to check the analog components
(e.g., HVPS) that are controlled by the analog
signals.
05 EEPROM Read
Reads each data item from the MCU PWB
EEPROM (NVM).
06 EEPROM Write
Writes each data item into the MCU PWB
EEPROM (NVM).
07 EEPROM Initialize
Initializes all data in the MCU PWB EEPROM
(NVM).
FF All Tests Stop Stops all diagnostic functions.