Instruction manual

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Troubleshooting and Repair

136 025-9416

Reformatting the RAM Disk

Follow the procedure below to test, format, and copy the standard databases onto the RAM disk:

[ ] 1. Ensure that a backup of the current databases and voice prompts is available. The data

will need to be restored following the reformat procedure. Refer to the Model 640

Operating and Programming Manual (Part No. 025-9417) for details.

[ ] 2. Verify that the ROM disk EPROMs (Part No. 601-0329) are version 2.01 or later.

[ ] 3. Power down the paging terminal.

[ ] 4. If this reformat coincides with a ROM disk software update, remove the current ROM

disk (Part No. 702-9389) and replace it with the new one.

If only the ROM disk EPROMs are being updated, remove the ROM disk. Then remove

the EPROMs from the disk and replace them with the new ones. The new chips should

be installed in U1-U4.

[ ] 5. Verify that the BIOS version is 1.0 for the currently shipping V53 microprocessor (Part

No. 601-0696). The BIOS EPROM is located to the immediate left of the RAM disk on

the main processor board.

[ ] 6. Install JP9 and JP10 on the main processor board. The jumpers are located together on

the right rear corner of the board, next to the ROM disk.

[ ] 7. Power-up the paging terminal.

[ ] 8. The front panel COM and MODEM lights (on the left) blink in the sequence shown in

Table 28.

Table 28. LED Operation during RAM Reformat Procedure

LED Blinking Sequence

Time Between

Sequences Description

COM + MODEM twice 1 sec after power up CPU self test

COM + MODEM twice 30 seconds

COM once 5 seconds Start of stage 1

COM + MODEM twice 50 seconds

COM once 5 seconds End of stage 1

COM + MODEM twice 10 seconds

COM + MODEM twice 15 seconds

COM twice 10 seconds Start of stage 2

COM + MODEM twice 10 seconds

COM twice 5 seconds End of stage 2

COM + MODEM twice 10 seconds

COM + MODEM twice 15 seconds

COM three times 5 seconds Start of stage 3

COM + MODEM twice

COM three times

25 seconds* End of reformat

* This sequence repeats every 10 seconds until the paging terminal is turned off.