Epson C 2900 Manual

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Confidential
4. Diag Types and Test Contents
4.1 ESS Diag
This section describes how to perform each test of the ESS Diag in detail.
4.1.1 Executing ESS diagnosis
1) Turn off the power.
2) Turn on the power while holding down S and T keys.
3) Release the fingers from these keys when the CE Mode and Password is displayed.
4) Press T key twice and press OK key.
5) The CE Mode and ESS Diag are displayed. (Entered the Diag. mode.)
6)...

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Confidential 4.1.4 EEPROM Test
Performs write/read/verify on the diag. area of the EEPROM.
Executes this test when the 116-323,116-324 and 116-390 errors occurred.
Test result: NG (Go to each FIP.) OK (Turn off/on the main power.)
The test performs read/write/verify of the test patterns (0xff,0xaa, 0x55 and 0x00) on one byte at every 
0x400 from the first address of EEPROM.
4.1.5 DRAM Test
Tests OPEN/SHORT with the address line of...

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Confidential 4.1.7 ASIC Test
Register check
Executes this test when the 116-343 error occurred.
Test result: NG (Go to FIP.) OK (Turn off/on the main power.)
ASIC register check.
4.1.8 PANEL Test
Tests the LED, LCD, and buttons of the control panel.
This test checks input and output of the control panel. When buttons are pressed in the manner shown 
in the following table, the test displays the corresponding contents on the LED and...

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Confidential 4.1.10 USB Host Test
When USB Host Test is executed, the following submenus are displayed. The communication between 
the USB Host port and the device connected with it can be confirmed. 
1)TEST MODE:
It makes it to the static test mode in which the DownStream port of Host Controller is specified. 
TEST J: The port is J state.
TEST K: The port is K state.
TEST SE0: The port is SE0 state.
TEST PACKET: The port repeats...

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Confidential
4.2 IOT Diag
4.2.1 Digital Input (DI) Test
This function checks whether the Digital Input (DI) components operate normally.
The DI test is performed for all DI components.
Exiting the DI Test moves the Control Panel display to the CE Diag Functions menu.
During the DI test, other CE Diag functions cannot be performed simultaneously. There-
fore, the printer does not accept any operation except operations for the DI...

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Confidential Parameters for the Sensor Test are as follows.
Code Component
DI-0 MFP No Paper Sensor
DI-1 Tray1 No Paper Sensor
DI-2 Regi Sensor
DI-3 Exit Sensor
DI-4 K Mode Sensor
DI-6 Side Switch Sensor
DI-7 Interlock Switch
DI-9 Tray2 No Paper Sensor
DI-a Tray2 Paper Path Sensor
Sns02002SB
Exit Sensor
[DI-3]
[DI-6]
MFP No Paper Sensor
[DI-0] Regi Sensor
[DI-2] K Mode Sensor
[DI-4] Interlock Switch
[DI-7]
Tray1 No Paper Sensor...

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Confidential - About Sensor
A transmission type sensor is composed of the light-emitting side and the light-receiving side that are 
placed opposite to each other, allowing the light to pass from the former to the latter. On the basis of 
whether or not the light path is blocked by the actuator, etc., the sensor detects the paper absence/
presence or the moving part position such as at the home position or elsewhere.
- About...

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Confidential - Checking the Sensor and Switch
Sensor Name (Diag. Code) Check Procedure
Manual Feed Sensor
(DI-0)1) Power on the printer, and enter the Diag Mode.
2) Execute DI-0.
3) Insert a sheet into the Manual Feed to check whether the sensor 
functions properly.
4) Confirm that the number shown on the bottom of the display 
increases each time the sheet is inserted.
5) Press the STOP key to stop the test.
Tray1 No Paper...

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Confidential Regi Sensor
(DI-2)NOTE: When performing operation for five minutes or longer with the 
front cover open, remove the drum cartridge, and cover the drum to 
avoid exposure to light.
1) Power on the printer, and enter the Diag Mode.
2) Open the Front Cover.
3) Execute DI-2.
4) Manually operate the actuator to check whether the sensor 
functions properly.
5) Check that the number in the bottom line of the display...

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Confidential K Mode Sensor
(DI-4)NOTE: These procedures are for the technical staff.
When performing operation for five minutes or longer with the front 
cover open, remove the drum cartridge, and cover the drum to avoid 
exposure to light.
1) Remove the DRIVE ASSY PH.
2) Power on the printer, and enter the Diag Mode.
3) Execute DI-4.
4) Block the sensor light path by placing a piece of paper or the like 
between the light...