Confidential
9-59
F-5
Speaker is silent during on-hook dialing.
Possible cause
Step
Check
Result
Remedy
Connection
between main
PCB and speaker
1
Main PCB and speaker
are properly connected.
No
Fix the connection properly.
Speaker
2
Replacement of speaker
solves the problem.
Yes Replace the speaker with a
normal part.
Connection
between main
PCB and NCU
PCB
3
Main PCB and NCU
PCB are properly
connected.
No
Fix the connection properly.
Harness between
main PCB and
NCU PCB
4
Harness is damaged.
Yes Replace the harness with a
normal part.
Connection
between main
PCB and control
panel PCB
5
Main PCB and control
panel PCB are properly
connected.
No
Fix the connection properly.
Harness between
main PCB and
control panel PCB
6
Harness is damaged.
Yes Replace the harness with a
normal part.
NCU PCB
7
Replacement of NCU
PCB solves the
problem.
Yes Replace the NCU PCB with a
normal part.
Main PCB
8
Replacement of main
PCB solves the
problem.
Yes Replace the main PCB with a
normal part.
F-6
Dialing function does not switch between "tone" and "pulse".
Possible cause
Step
Check
Result
Remedy
Connection
between main
PCB and NCU
PCB
1
Main PCB and NCU
PCB are properly
connected.
No
Fix the connection properly.
Harness between
main PCB and
NCU PCB
2
Harness is damaged.
Yes
Replace the harness with a
normal part.
NCU PCB
3
Replacement of NCU
PCB solves the
problem.
Yes
Replace the NCU PCB with a
normal part.
Main PCB
4
Replacement of main
PCB solves the
problem.
Yes
Replace the main PCB with a
normal part
Содержание DCP-7010
Страница 1: ...Confidential FACSIMILE EQUIPMENT SERVICE MANUAL MODELS MFC7420 7820N DCP7010 7020 7025 ...
Страница 14: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Страница 20: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Страница 44: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Страница 64: ......
Страница 65: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Страница 68: ...Confidential 4 2 Cover page sample End page sample ...
Страница 69: ...Confidential CHAPTER 5 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Страница 150: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Страница 154: ...Confidential CHAPTER 7 CLEANING ...
Страница 156: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Страница 164: ...8 7 Confidential Scanning Compensation Data List a b c d e f g h i j k l m n q ...
Страница 172: ...8 15 Confidential Configuration List ...
Страница 178: ...8 21 Confidential Cover page sample End page sample ...
Страница 187: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Страница 321: ...A NCU PCB MFC7420 U S A and CANADA models Confidential ...
Страница 322: ...A NCU PCB MFC7820N U S A and CANADA models Confidential ...
Страница 323: ...A NCU PCB MFC7420 EUROPE models Confidential ...
Страница 324: ...A NCU PCB MFC7820N EUROPE models Confidential ...
Страница 325: ...B Power Supply PCB 100V U S A and CANADA models Confidential ...
Страница 326: ...B Power Supply PCB 200V EUROPE models Confidential ...
Страница 327: ...December 04 SM FAX036 2 8C5A03 Printed in Japan ...