Epson AcuLaser C8500, Service Manual

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EPSON AcuLaser C8500 Revision C
Chapter 4 Diagnostics 4-22
4.2.5 Diagnostics Execution
4.2.5.1 Diagnostics Execution Procedures
The diagnostics commander command transmission function lets you
send the following commands to execute diagnostics.
1. The DIAGON command sends [75h] to enter the DIAG TEST mode
for executing diagnostics. (The DIAGON command is in [Command
Class: Printing/Status Control].)
2. The DIAGSTART command sets the parameter to [90h] and sends
it to start diagnostics. (The DIAGSTART command is in [Command
Class: Diagnostics Control].) Setting the diagnostics code as a
parameter allows execution of various diagnostics procedures.
3. The DIAGSTOP command sets the parameter to [91h] and sends it
to stop diagnostics. (The DIAGSTOP command is in [Command
Class: Diagnostics Control].)
4. The DIAGOFF command sends [76h] to leave the DIAG TEST
mode for executing diagnostics. (The DIAGON command is in
[Command Class: Printing/Status Control].)
4.2.5.2 Diagnostics Types
Diagnostics is a function that lets you diagnose problems. Including All
Test Stop, there are 9 types of diagnostics as shown below.
Table 4-5. Diagnostics Types
Parameter
(Hex) Diagnostics Type Description
00 Test Print Sets the printer internal test print
parameter.
01 Digital Input Test Executes input testing of sensors and
switches that have digital signals.
02 Digital Output Test Executes output testing of functional
parts operated by digital signals (motors
and solenoids, etc.).
03 Analog Input Test Executes input testing of sensors and
output monitors that have analog
signals.
04 Analog Output Test Executes output testing of functional
parts operated by analog signals (HVPS
output, etc.).
05 EEPROM Read Executes reading of all data types from
the MCU PWB EEPROM(NVM).
06 EEPROM Write Executes writing of all data types from
the MCU PWB EEPROM(NVM).
07 EEPROM Initialize Executes initialization of all data in the
MCU PWB EEPROM(NVM).
FF All Tests Stop Stops all diagnostics.