RUN EXCITE-2008: Service & Maintenance Manual - rev. 1.3
Page 6.18
Follow the procedure step by step to correctly diagnose the problem. Take particular care with the
checks highlighted by circled numbers, which are described in detail below:
To speed up the troubleshooting procedure, check the state of the power indicator LEDs
on the various circuit boards.
(1) Slightly lift the Faston connectors on the machine power inlet socket. Place the tester probes
across the live and neutral pins on the same connector. The measured voltage should be
approximately 220 VAC/110 VAC.
(2) Check if the LED 1 (+12Vdc), on the CPU board is on.
(3) Check if the +12Vdc is on Pin 1-9 and 3-10 of CN5 connector on the CPU board. Check if
the 3.3 Vdc is on Pin 1-5 of CN5 connector on the CPU board.
(4) As for step above, on CN1 connector of the LCD inverter.
(5) Check if the LEDs H6 and H3 (+5Vdc and +12Vdc) on the ALE driver, are on, and LEDs
H2 and H3 fot AT UL driver.
(6) Check if the main voltage (220Vac/110Vac), is on Pin 1-2 of J1 connector on ALE and AT
UL driver.
(7) Check if the main voltage (220Vac/110Vac), is on fastons OUT1 and OUT2 on the filter
board of the power supply box.
(8) Check the continuity of the power supplì signals on the TRM19 and TRM20 cables, by
referring to paragraph: 2.7. “Cables” and replace what’s defective.
(9) Check if the 12Vdc is to the input of CPU board, on Pin 2 and 6 of CN20 connector.
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