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3. Tech Mode
3-1 To Access TECH Mode
In Tech mode, the technician can perform various tests to isolate the causes of a malfunction, and set the technical option features to customize the machine depending on the user's operation environment. To access TECH mode, press SETUP, #, 1, 9, 3, 4 in sequence, and the LCD displays `TECH' in the standby mode screen. While in TECH mode, the machine still performs all normal operations. To return to the normal user mode, press SETUP, #, 1, 9, 3, 4 in sequence in TECH mode or turn the power off, then back on. The technical options you have set in TECH mode are not changed unless you clear the machine's memory in TECH mode. To communicate via direct connection with another fax machine, press OHD/V.REQ followed by Start/Enter.

3-2 Tech Mode Options
In TECH mode, press SETUP, then press or until `TECH MODE' appears in the display. Press Start/Enter. The following technical options are available. Note: If necessary, print System Data List in TECH mode. The list shows all current system data settings including the TECH MODE options. To print the system data list, press Report/Help, then press or Ž until `SYSTEM DATA' appears in the display, and press Start/Enter. Dialing Mode Default = Tone Select the dialing mode according to the user's line status.

Send Fax Level Default = -12 dBm You can set the level of the transmission signal. Typically, the Tx level should be under -12 dBm. The level within the range of 1 to -15 dBm is acceptable. Enter the desired value using the number keypad.

Modem Speed Default = 14.4 kbps Select the maximum modem speed of 14400, 12000, 9600, 7200, 4800, or 2400 bps. When the modem speed is set to 14400 or 12000, the Rx speed can be either V.33 or V.17 speed. When it is set to 9600 or 7200, the Rx speed can be either V.29 or V.27ter speed. When set to 4800 or 2400, the Rx speed can any V.27ter speed.

RCV Fax Level Default = -43 dBm The reception level may be too low due to the cable losses. If it is set to -43 dBm, the reception sensitivity will be between 0 and -43 dBm. If it is set to -48 dBm, the reception sensitivity will be between 0 and -48 dBm.

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Tech Mode

Flash Time Default = 600 milliseconds Set the flash time to 80, 280, or 600 milliseconds.

Silence Time Default = Unlimited In ANS/FAX mode, after a call is picked up by the answering machine, the machine monitors the line. If a period of silence is detected on the line at any time, the call will be treated as a fax message and the machine begins receiving. Silence detection time is selectable between limited (about 12 seconds) and unlimited time. When `12 sec' is selected, the machine switches to receiving mode as soon as it detects a period of silence. When `Unlimited' is selected, the machine waits until the answering operation is concluded even though a period of silence is detected. After the answering operation is concluded, the machine switches to receiving mode. Error Rate When the error rate is about to be over the setting value, the Baud rate automatically lowers up to 2400 bps to make the error rate remain below the setting value. You can select the rate between 5% and 10%.

Pause Time Default = 3 seconds It sets the length of the pause time from 1 through 9 seconds, when the pause button is pressed.

Redial Interval Default = 3 minutes If the remote machine is busy when the machine sends a fax using automatic dialing, the machine automatically redials the number. Select the time interval between automatic redial attempts. Enter the desired redial interval using the number keypad: 1 - 15 minutes.

Redial Count Default = 2 Select the number of automatic redial attempts. Enter the desired number using the number keypad: 0 - 5.

DP Make/Break Default = 40 - 60 Select the dial pulse make and break time: 40-60 or 33-67.

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Tech Mode

3-3 Maintenance Options
In TECH mode, press SETUP, then press or until `MAINTENANCE' appears in the display. Press Start/Enter. The following technical options are available: Clean Drum Use this feature to get rid of the toner remained in the development unit, so you can get a clean printout. Adjust Shading Use this feature to correct the white reference of the scanner if you experience bad copy images. When using this feature, a white paper should be used to get clean copy images. Remote Test The Remote Test feature can be enabled in order to allow a remote location to call up and run a diagnostic test on your machine. You may be instructed by a service representative to enable this feature. Notify Toner Low With this feature enabled, when the toner becomes low, the toner low information will be sent to ta specified contact point, for example, the service company. After you access this menu, select ON, and when the LCD prompts, enter the name and the number of the contact point, the customer's fax number, the model name, and the serial number. ROM Test Use this feature to test the machine's ROM. The result and the software version appear in the LCD display. CIS Test This test checks the operation of the Contact Image Sensor (CIS). Each time the number changes by one increment, the average ADC value of CIS prints out. DRAM Test Use this feature to test the machine's DRAM. The result appears in the LCD display. Switch Test Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window each time you press a key. Modem Test Use this feature to test the machine's modem. The modem will send various transmit signals on the telephone line. You can check the following: -FSK test -Tones: 1100 Hz, 1650 Hz, 1850 Hz, 2100 Hz -G3 training: 14400, 12000, 9600, 7200, 4800, 2400 bps DTMF Test Use this feature to test the machine's DTMF (Dual Tone Multi Frequency) signal. When you press any key on the number keypad including and #, you will hear the corresponding key tone. Toner count This feature shows the current state of the toner cartridge. After replacing Main board to new one, you should update the information to the new board. See page 00. - TONER CNT: The total number of the dots used to print up to current time. - CRU STATE: The page number which the toner cartridge can print. Printing Info This feature allows the machine to automatically print various information, like toner count, transfer voltage, fusing temperature and so on, at the bottom of each printed page. - PAGE TONER CNT: prints the number of dots used to print the page. - TOTAL TONER CNT: prints the total number of the dots used to print up to current time. - THV ON DUTY: prints ADC value of transfer voltage. - THERMISTER: prints ADC value of fusing temperature. - P: prints the page number. Program Download Use this feature to download a new upgraded ROM file from a PC that is connected to the machine with a parallel cable (IEEE 1284).

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Tech Mode

3-4 Printout Report
In TECH mode, press Report/Help, then select the desired list or report by using or key, then press Start/Enter. The following options are available: System Data This list provides a list of the user system data settings and tech mode settings.

Help Protocol List It shows a brief description on the machine's basic functions and commands. Use it as a quick reference guide. This list shows the sequence of the CCITT group 3 T.30 protocol during the most recent sending or receiving operation. Use this list to check for send and receive errors. If a communication error occurs while the machine is in TECH mode, the protocol list will print automatically.

Sent Journal This journal shows a specific information concerning transmission activities, the time and dates of up to 40 of the most recent transmissions.

Pattern Print Using this pattern printout, you can check if the printer mechanism is functioning properly. Examine the pattern and look for a break in the diagonal line. If the diagonal lines are not broken, the printer mechanism is functioning properly.

Received Journal This journal shows a specific information concerning reception activities, the time and dates of up to 40 of the most recent receptions.

Shading Print Phonebook It lists all telephone numbers that have been stored in the machine. With this print, you can check the scanning elements of the CIS (Contact Image Sensor).

Sending Confirm It shows the result of the last send operation.

Schedule Inform This list shows a specific information on the documents currently stored for delayed transmission. It provides the operation number, starting time, type of operation, etc.

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Tech Mode

3-5 Engine Test Mode
The Engine test mode is used to check the operation of the components related to the printer engine. The following test are available. ˇ MHV ON/OFF ˇ DEV ON/OFF ˇ THEVEA(THV-) ON/OFF: tests THV- voltage on/off. ˇ THV+ REF ON/OFF: tests THV+ voltage on/off. ˇ THV TRIGGER: tests THV+ trigger. ˇ MAIN MOTOR ON/OFF ˇ SOLENOID ON/OFF ˇ LSU MOTOR CHECK: tests the operation of LSU motor ˇ HSYNC CHECK: tests the operation of laser diode module of LSU. ˇ SENSOR CHECK: tests various sensors and switches. ([FD]: Feed sensor, [ET]: Exit sensor, [PE]: Paper empty, [CO]: Cover switch) ˇ PWM CODE: tests variability of THV- voltage. ([000]: outputs about 5 KVdc, [255]: outputs about 0 Vdc) ˇ FUSER TEST: tests the temperature of the fuser. When printing, the fuser operates in the temperature set for printing. When the power is turned off and back on, the fuser restores the temperature to default. ([161]: about 150 °C, [143]: about 170 °C) ˇ TOP MARGIN SET ˇ BIAS TEST VALUE: tests variability of bias voltage. When printing, the machine operates in the bias voltage set for printing. When the power is turned off and back on, the machine restores the bias voltage to default. ([172]: outputs about 350 Vdc, [196]: outputs about 450 Vdc) ˇ THV TEST VALUE: When printing, the machine operates in THV+ voltage set for printing. When the power is turned off and back on, the machine restores THV+ voltage to default. ([000]: outputs about 5 KVdc, [255]: outputs about 0 Vdc) To access the Engine test mode: 1. Press Setup, #, 1, 9, 3, 1 in sequence. 2. When `ENGINE TEST?' appears, press Start/Enter. 3. Scroll the options by pressing find the one you want. or repeatedly

4. Press Start/Enter to start the test. 5. Press Stop to exit the Engine test mode.

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Tech Mode

Memo

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