[10]SERVICING AT MEMORY TROUBLE AND MAIN CONTROL PWB RE- PLACEMENT
1. General
The EEPROM in the control PWB and the EEPROM are storing various set values, adjustment values, and counter values.
These data are very important and used for operating the machine properly and for service control.
In the following cases, therefore, various set values, adjustment values and counter values must be set again.
*When memory trouble (U2) occurs.
*When the EEPROM in the main control PWB is replaced.
*When the main control PWB is replaced.
When "U2" trouble occurs, the data cannot be relied upon, and they must be set properly.
2. Purpose
The purpose is to reset the memory data to operate the machine properly.
Use the attached service memory data recording sheet to memorize the newest data when servicing in order to cope with the above situations. This improves efficiency in servicing and realizes quick recovery.
3. Remedies
Perform the procedures according to the following flowcharts. "Sim" in the flowchart means "Simulation."
Memory trouble
Procedures for memory trouble, main control PWB replacement, and main control PWB EEPROM replacement
"U2" trouble occurs
Repair the defective section
NO | Do you replace |
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| the main control |
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| PWB? |
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| YES |
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| Replace the main |
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| control PWB |
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| Cancel "U2" trouble |
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| with simulation 16 |
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Replace the main
control PWB
Is the
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EEPROM in the main control PWB defective?
YES
Replace the main control PWB
1
Replace the
EEPROM in the
main control PWB
Mount the EEPROM of |
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the old main control to |
| Replace the EEPROM | ||
the new main control |
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End |
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