Epson C 2900 Manual

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Epson AcuLaser C2900NRevision B
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) Press OK key.
7) Press S or T key to select the test item.
8) Press OK key twice to execute the test.
To exit the test or to return to one step higher menu, press the STOP key.
4.1.2 All Test
Executes the ESS Diag except the following.
MAC+PHY Test/Panel Test/USB Host Test/RTC Test
***:Displays the test name that became error.
(FlashROM/EEPROM/DRAM/ASIC/IOT)
4.1.3 FlashROM Test
Calculates the ROM checksum and compares it with the value stored in the ROM.
Executes this test when the 116-317 error occurred.
Test result: NG (Go to FIP.) OK (Turn off/on the main power.)
This test calculates the checksum of the each ROM, and compares it with the valid checksum value 
stored in the corresponding chip beforehand. When the checksum is identical to the stored value, this 
test judges the chip is normal.
XXX: Displays the header name that became error.
(GLOBE/DACS/PCLFONT/HOSTBASE/CBRIDGE/BMFAPFONT) Normal Error
CHECK OK *** ERROR
Normal Error
CHECK OK               FlashROM ERROR
XXXXXX 
						

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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 the DRAM.
Performs write/read/verify on the entire DRAM.
Executes this test when the 116-315, 116-316 and 116-320 errors occurred.
Test result: NG (Go to each FIP.) OK (Turn off/on the main power.)
When the optional DRAM SIMM is checked and found, it checks the optional memory area.
First, the test performs read/write/verify of the increment data for the whole tested area by the word. 
Then, it performs read/write/verify of the test patterns (0xffffffff, 0xaaaaaaaa, 0x55555555, 
0x00000000) for the whole tested area by the word.
4.1.6 MAC+PHY Test
MAC: Media Access Control
PHY: Physical Layer
PHY Internal loopback test
Executes this test when the 116-314, 016-350, 116-351, 116-352 and 116-355 errors occurred.
Test result: NG (Go to each FIP.) OK (Turn off/on the main power.)
PHY Internal loopback testNormal Error
CHECK OK EEPROM ID* ERROR (*:1,2)
Normal Error
CHECK OK DRAM slot* ERROR (*:0,1)
Normal Error
CHECK OK MAC+PHY ERROR 
						

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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 LCD.
††† Indicates left side square is the Ready LED, middle square is the Alarm LED and right side 
square is the Power Save LED. STOP
†Not lighting „Lighting
4.1.9 IOT Test
Communication test with the IOT
Executes this test when the 024-371 error occurred.
Test result: NG (Go to FIP.) OK (Turn off/on the main power.)
This test checks communication with the IOT. Then it reads the status register of the IOT to check 
whether commands can be exchanged with the IOT.
It sends the following command to read the status register, and checks whether the appropriate 
response returns.
Read ROM Revision NoNormal Error
CHECK OK ASIC ERROR
Button LED LCD
S„„†Displays “UP” on the LCD.
T„„†Displays “DOWN” on the LCD.
W„††Displays “LEFT” on the LCD.
X„††Displays “RIGHT” on the LCD.
OK†„†Displays “SET” on the LCD.
MENU†„†Displays “MENU” on the LCD.
STOP†††Displays “CANCEL JOB” on the LCD.
POWER SAVE††„Displays “POWER SAVE” on the LCD.
S T pressed at the same 
time- (The test is completed) - (The test is completed)
Normal Error
CHECK OK IOT ERROR 
						

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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 the test packet. 
TEST ENABLE: The port compulsorily enters the state of ENABLE. 
2)Single Step:
The collection of Device Descriptor of the specified device address is executed by the single step. 
3)Get Device Info:
Information on the device is acquired. 
VID: Value of VendorID. 
PID: Value of ProductID. 
Add: Device address
Prt: Number of Downstream port of Controller or Hub. 
4.1.11 RTC Test
Checks the Real Time Clock chip. Execute this test when 117-365 Error occurred.
Normal Error
CHECK OK RTC ERROR
USB Host TestTEST MODE
Single Step
Get Device Info
Address: 000
Device 1
Device 2DATA IN
VID:0000 Add:000
PID:0000 Prt:000
Test J
Test K
Test SE0
Test PACKET
Test ENABLE 
						

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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 components 
and exit operation of the DI test.
At the start of the DI test, number 0 is displayed on the control panel. This number is counted up when 
a DI component is turned on from off, allowing the user to know that the component is active.
When a paper jam has occurred, or an error message or code is displayed, execute this test to locate 
the faulty parts.
Before executing the test, isolate the faulty parts by examining the jam or error in detail. (Refer to the 
FIP in Chapter 1.)
Test Result: NG (Go to the FIP or replace the parts.)
OK (Power off the printer and then on.)
4.2.2 Executing Sensor Test
1) Power off the printer.
2) Power on the printer while pressing 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) Press T to select IOT Diag, and then press OK key.
7) Press T key to select Digital Input, and then press OK key.
8) Press S or T key to select the test item.
9) Press OK key twice to execute the test.
- To exit the test or to return to one step higher menu, press the STOP key.
- From the menu which performed Sensor test, to return to one step higher menu, press 
the MENU key. 
						

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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
[DI-1]
Tray2 Paper Path Sensor
[DI-a]Tray2 No Paper Sensor
[DI-9]
Side Switch 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 Switch
A micro-switch closes the internal contacts via the button which is pushed down under the provided leaf 
spring which is held down by the actuator of the cover or door that is being closed.
When the door or cover is opened, the leaf spring returns to its original position, and the button is 
pushed up by the spring in the switch, allowing the internal contacts to open.
Actuator
Leg_Sec02_016FA
Actuator
Button
Blade
Contact
Leg_Sec02_018FA 
						

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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 Sensor
(DI-1)1) Power on the printer, and enter the Diag Mode.
2) Remove the paper from Tray1.
3) Execute DI-1.
4) Check whether the sensor functions properly by removing and 
replacing the Tray1.
5) Confirm that the number in the lower section of the display 
increases each time the Tray1 is removed and replaced.
6) Press the STOP key to stop the test.
MiS02003SA
MiS02004SA 
						

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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 
increases by one every time the actuator is operated.
6) Press the STOP key to stop the test.
7) Close the Front Cover.
Exit Sensor
(DI-3)NOTE: Because the fuser unit is very hot, be careful not to burn 
yourself.
1) Power on the printer, and enter the Diag Mode.
2) Open the Front Cover.
3) Execute DI-3.
4) Manually operate the actuator to check whether the sensor 
functions properly.
5) Check that the number in the bottom line of the display 
increases by one every time the actuator is operated.
6) Press the STOP key to stop the test.
7) Close the Front Cover. Sensor Name (Diag. Code) Check Procedure
Actuator
MiS02005SA
MiS02006GA 
						

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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 emitting unit and the light receiving unit to 
check whether the sensor functions properly.
5) Check that the number in the bottom line of the display 
increases by one every time the sensor light path is blocked.
6) Press the STOP key to stop the test.
7) Replace the DRIVE ASSY PH.
Side Switch Sensor
(DI-6)1) Power on the printer, and enter the Diag Mode.
2) Execute DI-6.
3) Open or close the Toner Access Cover to check whether the 
sensor functions properly.
4) Check that the number in the bottom line of the display 
increases by one every time the Front Cover is opened or 
closed.
5) Press the STOP key to stop the test.
6) Close the Toner Access Cover. Sensor Name (Diag. Code) Check Procedure
MiS02007KA
K Mode Solenoid Actuator
K Mode SensorPaper
MiS02006SA