HP designjet l65500 서비스 매뉴얼

 Troubleshooting

177

To see the LEDs remove the Left Side Rear Panel page 483. The LEDs are marked on the board.

1

5  Volts  STDBY

2

12 V AUX

3

24  V

4

42 V (ON only when the secondary power 

supply is turned on)

5

5  V

6

3,3  V

LEDs

5

10

24

Description 

State 1

OFF

OFF

ON

Fuse is blown or the ISS board has failed. Remove 

and replace board

State 2

OFF

OFF

OFF

24volts does not arrive to the board

State  3

ON

ON

ON

 Functional

2

3

4

5

6

1

•

5 V: power used by the 

board

•

10 V: Not used (only to 

regulate the tension from 

24 to 5 in 2 steps in order 

to reduce waste of energy)

•

24 V: Power that arrives to 

the board