Checking For Main Pc Board Failure; Checking Scsi Port; Post-Processing Ccd Output Waveform At Tp2 - Polaroid SS35 LE Repair Manual

SprintScan 35LE Service Manual

Checking for Main PC Board Failure

1. Check the output signal at test point TP2. Figure 3-6 shows the correct output
waveform.
Figure 3-6. Post-processing CCD Output Waveform at TP2
2. If the output waveform is incorrect, replace the main PC board.
Note: Its level must be even to level GND.

Checking SCSI Port

If the READY LED comes on but the scanner does not respond to a Start Scanning
command from the host computer:
1. Check to see if the SCSI ID is correct for both the software program and the
scanner.
2. Set the SCSI ID number to 7 and power up the scanner to enter the self-test mode.
(Shortly after, the scanner carriage will traverse up and down at a slow speed.)
Note: If the scanner fails to perform this routine, a main PC board malfunction is
detected.
3. Power off and set the SCSI ID to its original settings.
Note: When the SCSI bus is confirmed OK, replace the main PC board.
Votage
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Troubleshooting
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