HP designjet l65500 Manuale Di Servizio

 Troubleshooting

179

To visually access the Main Interconnect Board, you must remove the cover.  page 520.

The following diagram is split into five areas of LEDs, which are explained below.

There are two LEDs in this area.

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The left-most LED is labeled 24V. This LED is on when 24V is sent to the Scan Axis Motor.

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The right-most LED is labeled 12V. 

There are three LEDs here, all relating to the Scan Axis. From left to right:

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The first two LED's mean the GPIO direction. If the first one is ON it moves in one direction, and if 

the second one is ON, it moves towards the other direction.

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The third LED is ON if the motor is OK, and OFF when the motor fails.

One row of 24 LED‚s. 

From left to right: the first 6 LEDs relate to the L1 Remote Controller, the second six to the L2 Remote 

Controller, the third six to the L4 Remote Controller, and the last 6 to the L5 Remote Controller.

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L1: controls the pinch lever switch

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L2: controls the sliding door switch

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L4: controls the right front PPS

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L5: controls the right rear PPS

The important is the 5th LED of each row of 6 which are always ON and blink when the Homing sensor 

is pressed. The other LEDs are not important.

1

2

4

5

3