TM200 Service Manual
4 Troubleshooting
4.1 Symptoms and Solutions
This explains how to find the source of a problem using the symptom. The numbers in the “Checkpoints” column indicate the order to use to check the problem. If you cannot determine the cause of the problem after checking the first item, proceed to the next number.
Table
Symptom |
| Checkpoints (by Priority) |
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Power does not turn on. |
| 1. | Check the power supply unit. Check that 24V is coming out of | |||||
Power on self check is not |
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| the power supply |
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completed |
| 2. Check the main circuit board unit. |
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Or, POWER LED does not light. | 3. | Unplug the printer. Then unplug each motor or coil's | ||||||
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| connector from the main board one by one; plug the printer | ||||
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| back in, and power it on. This will let you know if any motor or | ||||
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| coil has burned out and is pulling down the power. | ||||
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| 4. Replace the I/F circuit board. |
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There are missing dots |
| Receipt | 1. | Clean the thermal print head. | (See page 30) | |||
in the print |
| printing | 2. | Replace the thermal print head module. | (See page 44) | |||
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| 3. | Replace the main circuit board unit. | (See page 47) | |||
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The print is thin. |
| Receipt | 1. | Clean the thermal print head. | (See page 30) | |||
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| printing | 2. Adjust DIP switches DSW | |||||
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| switches). (See page 12) |
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| 3. Replace the thermal print head module. (See page 44) | |||||
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| 4. | Replace the main circuit board unit. | (See page 47) | |||
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Unevenness occurs in |
| Receipt | 1. | Clean the thermal print head. | (See page 30) | |||
the concentration of |
| printing | 2. Replace the thermal print head module. | (See page 44) | ||||
the print. |
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| 3. Replace the main circuit board. | (See page 47) | ||||
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Paper feed failure. |
| Thermal | 1. | Check that the roll paper is properly loaded. | ||||
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| printer | 2. Check the receipt paper feed motor. |
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| 3. | Replace the main circuit board. | (See page 44) | |||
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Paper jams |
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| Remove the jammed paper by following the directions in | |||||
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| “Clearing Paper Jams.” |
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Missing characters/misprinted | 1. | Check the DIP switch settings. |
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characters/font breakdown. | 2. Replace the interface cable. | (See page 47) | ||||||
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ERROR LED is lit. |
| 1. Close the cover. |
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| 2. Install a new paper roll. |
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