VI –
12
2.4
Troubleshooting Procedures
[ 1 ]
Control panel related
Trouble
Check:
(1) LCD shows nothing.
• Main-panel harness between the main PCB and the
control panel PCB
• Interfaces between the main PCB, NCU PCB and power
supply PCB
• Control panel PCB
• Power supply PCB
• Main PCB
(2) Control panel inoperative.
• Main-panel harness between the main PCB and the
control panel PCB
• Interfaces between the main PCB, NCU PCB and power
supply PCB
• Control panel PCB
• FPC key
• Main PCB
Trouble
Check:
(1) No phone call can be made.
[ 2 ]
Telephone related
• FPC key
• Control panel PCB by using the maintenance-mode
function No. 13. If any defective keys are found, replace
them. (Refer to Chapter V, Section 3.6.)
• NCU PCB
• Main PCB
(2) Speed dialing or one-touch
dialing will not work.
• Ordinary dialing function (other than the speed and one-
touch dialing)
If it works normally, check the main PCB; if not, refer to
item (1) above.
(3) Speaker silent during on-hook
dialing.
• Ordinary dialing function (other than the on-hook dialing
with the hook key)
If it works normally, proceed to the following checks; if
not, refer to item (1) above.
(4) Dial does not switch between
tone and pulse.
• Main PCB
Summary of Contents for FAX-270MC
Page 4: ...CHAPTER I GENERAL DESCRIPTION ...
Page 11: ...CHAPTER II INSTALLATION ...
Page 12: ...CHAPTER III THEORY OF OPERATION ...
Page 49: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 86: ...IV 36 4 Cutter unit Cutter unit A A A A ...
Page 87: ...CHAPTER V MAINTENANCE MODE ...
Page 140: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...
Page 157: ...March 98 5X1S112 Printed in Japan ...
Page 173: ...D POWER SUPPLY 100 120 V U S A CANADA ...
Page 174: ...POWER SUPPLY 200 240 V EUROPE SOUTH AMERICA D ...
Page 175: ...POWER SUPPLY 200 240 V GULF ASIA CHINA D ...
Page 192: ...D POWER SUPPLY 100 120 V U S A CANADA ...
Page 193: ...POWER SUPPLY 200 240 V EUROPE SOUTH AMERICA D ...
Page 194: ...POWER SUPPLY 200 240 V GULF ASIA CHINA D ...
Page 195: ...FACSIMILE EQUIPMENT PARTS REFERENCE LIST MODEL FAX170 190 190 Plus 195 ...
Page 198: ......
Page 203: ......
Page 206: ...Remarks 8 8 8 8 8 8 9 9 8 8 8 8 8 8 0 1 0 1 Brother Technical Information FAX98250 4 ...
Page 208: ... 8 01 8 01 8 8 8 8 0 1 0 1 8 8 8 8 Brother Technical Information FAX99102 6 ...
Page 220: ......