39/41B
Service Manual
5-14
• SCK* line (U22-2) should be changing states at slightly less than a 500 KHz rate.
• Data written to the serial EEPROM (U22-3) should be the same as U2-33 (line
labeled DIN).
• Data read from the serial EEPROM (U22-4) should be the same as the data supplied
to the processor (U2-38).
If the data on U22-4 and U2-38 are not the same, but the ATOD_EE (U3-12) is low,
U3 may be defective.
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