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DEVELOPMENT
B039/B040/B043
6-48
SM
6.9.7 TONER SUPPLY IN ABNORMAL SENSOR CONDITIONS
ID Sensor
Readings are abnormal if any of the following conditions occur:
•
Vsg
≤
2.5V
•
Vsg < 3.5V when maximum power (979) is applied
•
Vsp
≥
2.5V
•
(Vsg – Vsp) < 1.0V
•
Vt
≥
4.5V or Vt
≤
0.2V
The above ID sensor values can be checked using SP2-221.
When this is detected, the machine changes the value of Vref to 2.5 V then does
the toner density control process (in a similar way to sensor control mode 2).
No SC code is generated if the ID sensor is defective.
TD Sensor
The TD sensor output is checked every copy. If the readings from the TD sensor
become abnormal, the machine changes the toner density control mode to fixed
supply mode 2, and the toner supply amount per page is always 200 ms,
regardless of the value of SP2-925. If the machine detects the TD sensor error
condition 10 times consecutively, an SC code is generated (SC390) and the
machine must be repaired.
Summary of Contents for LD013
Page 1: ...001129MIU SERVICE MANUAL B039 B040 B043 B120 RICOH GROUP COMPANIES...
Page 2: ......
Page 3: ...SERVICE MANUAL B039 B040 B043 B120 RICOH GROUP COMPANIES...
Page 4: ......
Page 5: ...B039 B040 B043 B120 SERVICE MANUAL 001129MIU...
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Page 26: ......
Page 30: ......
Page 31: ...INSTALLATION...
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Page 61: ...PREVENTIVE MAINTENANCE...
Page 62: ......
Page 66: ......
Page 67: ...REPLACEMENT AND ADJUSTMENT...
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Page 124: ......
Page 125: ...TROUBLESHOOTING...
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Page 140: ...SERVICE TABLES...
Page 141: ......
Page 192: ...DETAILED SECTION DESCRIPTIONS...
Page 193: ......
Page 269: ......
Page 270: ...AUTO REVERSE DOCUMENT FEEDER B379...
Page 271: ......
Page 300: ...DOCUMENT FEEDER B387...
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Page 323: ......
Page 324: ...PAPER TRAY UNIT B384...
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Page 344: ...PAPER TRAY UNIT B385...
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Page 361: ......
Page 362: ...SPECIFICATIONS...
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Page 373: ...B120 RLA only...
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Page 378: ......
Page 379: ...FAX UNIT B404...
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Page 382: ......
Page 383: ...INSTALLATION...
Page 384: ......
Page 392: ......
Page 393: ...PREVENTIVE MAINTENANCE...
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Page 396: ......
Page 397: ...REMOVAL AND REPLACEMENT...
Page 398: ......
Page 402: ......
Page 403: ...TROUBLESHOOTING...
Page 404: ......
Page 416: ...SERVICE TABLES...
Page 417: ......
Page 489: ......
Page 490: ...DETAILED SECTION DESCRIPTIONS...
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Page 497: ......
Page 498: ...SPECIFICATIONS...
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Page 510: ...FIRMWARE HISTORY...
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