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BOARDS
B418
4-4
SM
4.2.3 NCU (US)
Jumpers
Item
Description
JP7
JP8
These jumpers should be shorted when the machine is connected to a dry
line.
DB1
Also remove DB1 when the machine is connected to a dry line.
Ring
Detection
Circuit
O H D I S W
TIP
RING
T 1
T 2
T R X D
Current
Sensor
Hook1
Hook0
O H D I S W .
N C U
J P 7
J P 8
ExRing
C M L
Relay
Noise
Filter
Surge
Protection
O v e r -
current
Protection
Surge
Protection
DC Loop
L-
Transformer
C M L S W
Noise
Filter
D B 1
B418D520.WMF
Summary of Contents for B022
Page 1: ...B022 B027 SERVICE MANUAL 001197MIU RICOH GROUP COMPANIES...
Page 2: ......
Page 3: ...B022 B027 SERVICE MANUAL RICOH GROUP COMPANIES...
Page 4: ......
Page 5: ...B022 B027 SERVICE MANUAL 001197MIU...
Page 6: ......
Page 8: ......
Page 10: ......
Page 12: ......
Page 36: ......
Page 37: ...OVERALL MACHINE INFORMATION...
Page 38: ......
Page 59: ...DETAILED SECTION DESCRIPTIONS...
Page 60: ......
Page 131: ...INSTALLATION...
Page 132: ......
Page 190: ...SERVICE TABLES...
Page 191: ......
Page 270: ...PREVENTIVE MAINTENANCE...
Page 271: ......
Page 275: ......
Page 276: ...REPLACEMENT AND ADJUSTMENT...
Page 277: ......
Page 328: ...TROUBLESHOOTING...
Page 329: ......
Page 351: ......
Page 352: ...PAPER TRAY UNIT A860 B390...
Page 353: ......
Page 375: ......
Page 376: ...LCT A862 B391...
Page 377: ......
Page 397: ......
Page 398: ...AUTO REVERSE DOCUMENT FEEDER B386...
Page 399: ......
Page 429: ......
Page 430: ...INTERCHANGE UNIT B300 B416...
Page 431: ......
Page 437: ......
Page 438: ...1 BIN TRAY UNIT A898 B413...
Page 439: ......
Page 445: ......
Page 446: ...SHIFT TRAY UNIT B313 B459...
Page 447: ......
Page 455: ......
Page 456: ...BY PASS A899 B415...
Page 457: ......
Page 465: ......
Page 466: ...DUPLEX A896 B414...
Page 467: ......
Page 479: ......
Page 480: ...BRIDGE UNIT A897 B417...
Page 481: ......
Page 490: ...1 000 SHEET FINISHER B408...
Page 491: ......
Page 518: ...500 SHEET FINISHER G302 B442...
Page 519: ......
Page 541: ......
Page 542: ...FIRMWARE HISTORY...
Page 543: ......
Page 549: ......
Page 550: ...PRINTER SCANNER CONTROLLERS B453 B461...
Page 551: ......
Page 592: ...FAX UNIT B418...
Page 593: ......
Page 734: ...TECHNICAL SERVICE BULLETINS...
Page 737: ......
Page 763: ...FIRMWARE HISTORY...