40838301TH Rev.1
7 - 25
ACTION Item:
No.
ACTION
1
Probable cause 1: A double AC voltage is applied (200V is applied to a 120V transformer).
Check item 1:
Check the input AC voltage.
Probable cause 2: A short-circuit between lines after F2.
Check item 2:
Check the pattern on PCB and T1.
2
Probable cause 2: Short-circuit in 30V output circuit.
Check item 1:
Check DS1, C7, and R53.
Probable cause 2: A short-circuit in 5V output circuit.
Check item 2:
Check Q1, D6, D7, C6, C10, C20, D6, D8, R4, R9, R83, R10, R11, and C35.
If D8 and D6 operate and F3 blows when 5V overvoltage is detected, D8
and Q1 may be detective. Replace both D8 and Q1.
3
Probable cause 1: If the AC voltage is high (127V or more)/(250V or more), the output voltage
becomes higher than the specified value. If the AC voltage is low (102V or
less)/(198V or less), the output voltage becomes lower than the specified
value.
Check item 1:
Check the AC voltage.
Probable cause 2: If the load setting is large, the output voltage becomes lower than the
specified value.
Check item 2:
Check the load resister.
Probable cause 3: DS1 is defective (if the 30V output voltage is low).
Check item 3:
Check DS1 and R53.
4
Probable cause 1: F3 blows.
→
See ACTION 2.
Probable cause 2: T1 is defective.
Check item 2:
Check secondary side pins 1 to 3 and primary side pins 1 and 2 of T1.
Check item 3:
Check DS1 for shorting and opening.
5
Probable cause 1: D10 and D11 are defective.
Check item 1:
Check the AC voltage.
Probable cause 2: T1 is defective.
Check item 2:
Check pins 5 and 6 of T1 (thermal fuse may blow).
6
Probable cause 1: The reference resister is defective.
Check item 1:
Check R83, R10 and R11 (tolerance error: +/- 1%).
Probable cause 2: IC1 is defective.
Check item 2:
Check IC1-1 pin (normal value: 2.45 to 2.69V).
7
Probable cause 1: F3 blows.
→
See ACTION 2.
8
Probable cause 1: C19 and C20 are defective.
Check item 1:
Check C10 and C20.
Probable cause 2: L3 is defective.
Check item 2:
Check L3.
Probable cause 3: C8 and C35 are defective.
Check item 3:
Check C8 and C35.
Содержание OKIFAX 5400
Страница 7: ...40838301TH Rev 1 CHAPTER 1 GENERAL INFORMATION...
Страница 46: ...40838301TH Rev 1 CHAPTER 2 INSTALLATION PROCEDURE...
Страница 130: ...40838301TH Rev 1 CHAPTER 3 BRIEF TECHNICAL DESCRIPTION...
Страница 138: ...40838301TH Rev 1 CHAPTER 4 MECHANICAL DISASSEMBLY AND REASSEMBLY...
Страница 157: ...40838301TH Rev 1 CHAPTER 5 ADJUSTMENTS...
Страница 162: ...40838301TH Rev 1 CHAPTER 6 CLEANING AND MAINTENANCE...
Страница 189: ...40838301TH Rev 1 CHAPTER 7 TROUBLESHOOTING AND REPAIR FOR OKIFAX 5400...
Страница 240: ...40838301TH Rev 1 CHAPTER 8 DIPSWITCHS SETTING TABLES...
Страница 353: ...40838301TH Rev 1 Appendix B Descriptions of Print Operation First Edition August 1999 Oki Data Corporation...
Страница 375: ...40838301TH Rev 1 Appendix C Circuit Diagram and Parts List OK IFAX 5400 First Edition August 1999 Oki Data Corporation...
Страница 380: ...40838301TH Rev 1 D 2 SECTION 1 CABINET ASSEMBLY 5...
Страница 382: ...40838301TH Rev 1 D 4 SECTION 2 CONTROL PANEL ASSEMBLY...
Страница 384: ...40838301TH Rev 1 D 6 SECTION 3 PRINTER ASSEMBLY 51...
Страница 387: ...40838301TH Rev 1 D 9 SECTION 4 BASE ASSEMBLY 30 37 36 39 40 5...
Страница 390: ...40838301TH Rev 1 D 12 SECTION 5 SCAN UNIT...
Страница 392: ...40838301TH Rev 1 D 14 SECTION 6 PAPER GUIDE U ASSEMBLY...
Страница 394: ...40838301TH Rev 1 D 16 SECTION 7 CABLES 10 11 19 12 20 21...
Страница 396: ...40838301TH Rev 1 D 18 SECTION 8 OPTION TELEPHONE US...
Страница 399: ...40838301TH Rev 1 D 21 SECTION 8 OPTION TELEPHONE UK ITA NOR DEN BEL...
Страница 402: ...40838301TH Rev 1 D 24 SECTION 8 OPTION TELEPHONE HOL GER FRA SWITZ AUT INT L...
Страница 405: ...40838301TH Rev 1 Appendix E Board Layout OKIFAX 5400 First Edition August 1999 Oki Data Corporation...
Страница 424: ...40838301TH Rev 1 F 15 5 2 PCB Layout TQSB 2PCB PU FG CONTROLLER MOTOR DRIVER SEN2 MOTOR OSC SEN1...
Страница 425: ...40838301TH Rev 1 F 16 Figure 6 1 6 PARTS LIST SECTION1 CABINET CASSETTE ASSEMBLY F 16 1 4 P 6 5 8 7 3 O 1 2...
Страница 426: ...40838301TH Rev 1 F 17 SECTION2 MECHANICAL ASSEMBLY Figure 6 2 F 16 2 9 A 0 C M L D N E F G H U V T S Q R J I B K A A B B...
Страница 428: ...40838301TH Rev 1 Appendix G RMCS SYSTEM MANUAL For Model 20 First Edition August 1999 Oki Data Corporation...