Checking Internal Connections - Toshiba digital copiers Service Manual

4
T
O CHECK INTERNAL CONNECTIONS
4-4
Troubleshooting

Checking internal connections

To check the internal connections you must remove the GA-1121 from the printer.
Use the guidelines in Chapter 3, "Service Procedures" when removing, disassembling,
checking, and reassembling the GA-1121.
Before you access internal components, review the safety precautions on page viii.
Use ESD precautions when handling printed circuit boards and electronic components.
1. Power off the printer, remove the GA-1121 from the printer, and open the GA-1121
assembly (see page 3-4).
2. Before you touch any components inside the GA-1121, attach a grounding strap to your
wrist and discharge any static electricity on your body by touching a metal part of the
GA-1121.
3. Inspect the inside of the GA-1121.
• Make sure no unwanted objects have been dropped inside the GA-1121.
• Look for cables that are obviously loose. Reseat each connector firmly.
• Make sure each connector is properly aligned with its mating connector. If the pins are
offset from each other, the component affected will not function properly.
• Reseat the DIMM(s) to remove any oxidation on the connectors (see page 3-13).
If these quick checks do not identify the problem, see "Inspecting the system" on
page 4-5 before reassembling the GA-1121.
4. Reassemble the GA-1121 and verify functionality (see page 3-21).