
TESTMODE > FAX > MODEM
Item
Description
RELAY-1
Title
NCU relay test 1
Details
N To test ON/OFF of relay and port switch of NCU.
This mode is disabled for an NCU with no relay and port switch.
Use case
When analyzing the cause of a problem
Adj/set/operate method
Enter the setting value, and then press Apply key.
Caution
Be sure to set the value back to 0 after the test.
Display/adj/set range
0 to 6
0: All OFF
1: CML ON/OFF
2: P ON/OFF
3: S ON/OFF
4: H ON/OFF
5: HD ON/OFF
6: R ON/OFF
Default value
0
Related service mode
TESTMODE > FAX > MODEM > RELAY-2
RELAY-2
Title
NCU relay test 2
Details
To test ON/OFF of relay and port switch of NCU.
This mode is disabled for an NCU with no relay and port switch.
Use case
When analyzing the cause of a problem
Adj/set/operate method
Enter the setting value, and then press Apply key.
Caution
Be sure to set the value back to 0 after the test.
Display/adj/set range
0 to 7
0: All OFF
1: CIST2 ON/OFF
2: C1 ON/OFF
3: NORG ON/OFF
4: DCSEL ON/OFF
5: DCLIM ON/OFF
6: IPSEL1 ON/OFF
7: IPSEL2 ON/OFF
Default value
0
Related service mode
TESTMODE > FAX > MODEM > RELAY-1
FREQ
Title
To test whether the specified frequency is oscillated.
By closing or opening the DC circuit in accordance with the setting value, the specified frequency is oscil-
lated by the tone transmission function of the modem.
Check this with the speaker.
Details
When analyzing the cause of a problem
Adj/set/operate method
Enter the setting value, and then press Apply key.
Caution
Be sure to set the value back to 0 after the test.
Display/adj/set range
0 to 7
0: OFF
1: 462 Hz
2: 1100 Hz
3: 1300 Hz
4: 1500 Hz
5: 1650 Hz
6: 1850 Hz, 7: 2100 Hz
Default value
0
G3TX
Title
G3 signal transmission test
Details
To test whether the specified G3 signal is transmitted.
By closing or opening the DC circuit in accordance with the setting value, the specific G3 signal pattern is
transmitted at the specified transmission speed by the G3 signal transmission function of the modem.
Check this with the speaker.
8. Service Mode
310
Summary of Contents for MF720 Series
Page 1: ...Revision 2 0 MF720 Series Service Manual...
Page 12: ...Product Overview 1 Product Lineups 5 Product Features 7 Specifications 8 Name of Parts 14...
Page 79: ...4 Click Import Export Import 1 2 2 Technical Explanation 71...
Page 103: ...Durable Parts No durable parts is set for this product 3 Periodical Service 95...
Page 104: ...Periodical Services No periodical service is set for this product 3 Periodical Service 96...
Page 232: ...Adjustment 5 Overview 225 Adjustment at Parts Replacement 226...
Page 248: ...Troubleshooting 6 Test Print 241 Trouble shooting items 243 Version Upgrade 244 Debug Log 248...
Page 258: ...Error Jam Alarm 7 Outline 251 Error Codes 252 Jam Code 257...
Page 267: ...Service Mode 8 Overview 260 COPIER 264 FEEDER 300 FAX 302 TESTMODE 308...
Page 322: ...APPENDICES Service Tools 315 General Circuit Diagram 316 Print Sequence 317 Backup Data 318...