26
Troubleshooting Guide
Appearance Checks
Localize defective parts such as broken switches and levers, damaged FFC cable, loose
connections, burned components or blown fuses.
Functional checks
Define the defective functional block without disassembling the printer:
• Power-on initialization check (Checking printer power)
• Display indicator check (lamps operate abnormally)
• Checking on the error messages
• Performing self test check
• Sending printable characters from the host system to check the output (Head
Adjustment Lever)
• Checking function after Program ROM replacement
• Line feed control function check (Reverse line feeding stops after exceeding 22
inches)
Voltage check on the test points specified on Main PCB:
(Remove the top cover and lift the mechanism. Then inspect from the rear side.)
• +5V(Vcc)
No.32 pin of U8 (OPTION FONT) of the Main PCB.
• +40V
The left side lead wire of the resistor R209 of the Main PCB.
Note:
When the interlock SW is OFF, the output of this point is open.
When the interlock SW is ON, the output of this point is 40V.
Components checks
• You can perform component level repairs using voltage/ampere meters,
Oscilloscope.
• You may be required to understand the electric component characteristics and the
operation principles, before you make any repairs. For the power supply PCB, many
details are provided for your troubleshooting aids.
Содержание Accel-7350
Страница 1: ...1 Accel 7350 Dot Matrix Printer Service Manual Document 130034 ...
Страница 24: ...23 Wiring Diagram ...
Страница 25: ...24 Control Diagram ...
Страница 35: ...34 Dots Missing Caution Do not touch the print head immediately after printing because it may be too hot ...
Страница 36: ...35 Extra Dot Printing Improper character ...
Страница 37: ...36 Incorrect Printing Irregular print data ...
Страница 38: ...37 No LCD Display Half of the LCD lights up ...
Страница 39: ...38 No LCD Display Completely blank ...
Страница 40: ...39 Control Keys Not Functioning ...
Страница 41: ...40 No Buzzer Abnormal Ribbon Feeding Causing abnormal carriage movement ...
Страница 42: ...41 No Line Feed or Inconsistent Line Feeding ...
Страница 43: ...42 Carriage Error ...
Страница 44: ...43 ...
Страница 46: ...45 Cover Open Error Will Not Cancel With Cover Closed ...
Страница 47: ...46 No Fanfold Paper Reverse Line Feed ...
Страница 48: ...47 Printing Does Not Stop After Paper Is Ejected ...
Страница 49: ...48 Not Powering Up ...
Страница 94: ...93 Indicator Circuit ...
Страница 95: ...94 I F Circuit ...
Страница 96: ...95 Slide SW Circuit ...
Страница 97: ...96 Power Circuit ...
Страница 98: ...97 Exploded View 1 6 Following pages require Legal size paper for printing ...
Страница 99: ...98 Exploded View 2 6 ...
Страница 100: ...99 Exploded View 3 6 ...
Страница 101: ...100 Exploded View 4 6 ...
Страница 102: ...101 Exploded View 5 6 ...
Страница 103: ...102 Exploded View 6 6 ...
Страница 119: ...126 ...