Specifications

Rockhopper 38 – Maintenance Manual
171
AP-74038, Rev. 1.1, 25/01/05
42 V DC Check
Step 1 : Turn off the power switch and open the Control Box.
(The power cable may remain connected.)
Step 2 : With Power Board connector J001 disconnected, turn on the Power Switch and check that +42 V
±0.5 V is being output between pins 10 and 11 of J001.
If not, take the following steps to identify the cause:
• Go to (How to Check the Power Supply Voltages/100 V AC or 200 V AC)
• If the 100 V AC or 200 V AC check is normal and there is no +42 V output, replace the
Power Board.
Step 3 : Turn off the power supply momentarily to restore the J001 connector to the Power Board.
Turn on the Power Switch and check that +42 V ±0.5 V is being output between pins 10 (GND)
and 11 of J100 on the Main Board.
If not, take the following steps to identify the cause:
• Turn off the power supply momentarily to disconnect J102 (PUMP) from the Main Board and
check again.
If this is successful, the Pump Assembly is faulty.
• Turn off the power supply momentarily to disconnect J207 (Head Black) from the HeadBoard
and check again.
If this is successful, either the Print Head Black Assembly or the Head Cable Black
Assembly is faulty.
• Turn off the power supply momentarily to disconnect J208 (Head Color) from the Head
Board and check again.
If this is successful, either the Print Head Color Assembly or the Head Cable Color
Assembly is faulty.
• Turn off the power supply momentarily to restore connectors J207 and J208 and disconnect
J111 and J112 (Y Cable Assembly) from the Main Board and check again.
If this is successful, either the Head Board or the Y Cable Assembly is faulty.
Step 4 : If there is still no +42 V output with all the above connectors disconnected,
• Replace the DC Cable Assembly.
• Replace the Main Board.