Applies to

• Lotem^® 800 Quantum
• Lotem 850 Quantum
• Lotem Spectrum Quantum
• Lotem 800 II Family
• Lotem 400 Quantum

Priority = Next visit
Release date = 25 Feb 2003

Component

Carriage amplifier board.

Problem

• Connectors J1 and J3 do not meet electric current requirements.
• Intermittent error  Carriage Amplifier did not detect occurs due to noise on the carriage amplifier board.

Solution

Improve the power supply to the carriage amplifier board by replacing both the J1 and J3 connectors:

The board, which receives 48V directly from the TMC, generates +/- 12V and 5V. Since the new board includes new J1 and J3 connectors, you need to replace the following two cables:

• The cable between the carriage amplifier board and the carriage motor.
• The power supply cable between the TMC and the carriage amplifier board.

Note: This FCO has already been implemented in platesetters leaving the production line after 4/3/2003, with serial number 131029.

Time needed to implement

1 hour

Parts needed

Procedure

1. Shut down the Lotem.
2. Unplug the connectors on the carriage amplifier board, then remove the carriage amplifier board.
3. Make sure to remove the protective liner from the carriage driver heat sink compound:

Note: The protective liner is a transparent nylon sheet covering the purple cloth liner. Remove only the protective transparent liner.

4. Assemble the new carriage amplifier board.
5. Replace the existing carriage amplifier power cable with the new power cable (P/N 504L4E388).
6. Replace the existing carriage motor cable with the new motor cable (P/N 504L4E389) by running it along the main upper harness:

6. Reconnect the J1 and J3 connectors:

7. Run a customer's job to check that the Lotem operates properly.

Logistics

Approved quantities: 

Schedule supplies for first lots: 

Material Disposition

Throw away the old carriage amplifier board.

Technical contact

Nir Peleg

Date submitted