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| Chapter 12 Troubleshooting |
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Symptom |
| Measures |
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• | Measure the resistance values of pin 1 and pin 2, pin 2 and pin 3, pin 3 | |
curs. |
| and pin 4, pin 4 and pin 5, and pin 5 and pin 1 at each connector |
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| section of the |
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| approximately 2.4Ω. |
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| Replace the faulty motor with a new one. |
| • | Refer to the block diagram showing the cable connection and check to |
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| see if connection from the |
| • Replace the main PCB with a new one. | |
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The following errors frequently occur. | • | Replace the main PCB with a new one. |
• Lower shaft memory error |
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• ERROR E5 to ERROR FF |
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Only a certain head does not oper- | • | Is the head out of action with either the head switch or the machine |
ate. |
| controller? |
| • | Refer to the block diagram showing cable connections and check to |
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| see that other cables are connected to the head switch PCB and the |
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| head PCB and the head PCB properly. |
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Jump solenoids and wiper solenoids | • | Refer to the block diagram showing cable connections and check to |
of all heads do not operate. |
| see if connection from connector P4 of the power supply PCB in the |
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| control box to connector P6 of the power supply PCB in the power |
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| supply base, and connection from connector P5 of the power supply |
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| PCB in the power supply base to the 39 terminal of the power |
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| transformer are proper. |
| • | Check fuse F4 on the power supply PCB in the power supply base. |
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| If it is blown, replace it with a new one. The 50v circuit is faulty if the |
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| fuse is blown immediately after turning on the power even after |
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| replacing the fuse. |
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Jump solenoid does not operate. | • | Check to see if connection from the jump solenoid to connector P10 of |
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| the head PCB is proper. |
| • Check the resistance value of the jump solenoid which does not operate | |
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| with the connector section. The normal resistance value is |
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| approximately 56Ω. |
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| If it is faulty, replace the solenoid with a new one. In this case, the |
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| head PCB may also be faulty. Also replace the head PCB with a new |
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| one if it does not operate properly even after replacing the solenoid. |
| • | Refer to the block diagram showing the cable connections and check |
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| to see if connection from connector P12 of the head PCB to connectors |
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| P7, 8, 13, 14, 15, and 16 on the power supply PCB in the control box is |
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| proper. |
| • Replace the head PCB with a new one. | |
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261 |
