DC503/Repairs: Difference between revisions
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==Repair Issues== | ==Repair Issues== | ||
* If no LED or display segment is lit after trun on, check for +15 V from U500 Voltage regulator IC type 723. | * If no LED or display segment is lit after trun on, check for +15 V from U500 Voltage regulator IC type 723. | ||
* All ICs are placed in IC sockets. [[bad TI IC sockets|Contact problems can occur]]. Removing and inserting ICs | * All ICs are placed in IC sockets. [[bad TI IC sockets|Contact problems can occur]]. Removing and inserting ICs may help temporarily. | ||
* Check board is mounted to frame with plastic washers in between near pcb conductor tracks, otherwise a short to GND can occur. | * Check board is mounted to frame with plastic washers in between near pcb conductor tracks, otherwise a short to GND can occur. | ||
[[Category:Instrument repair reports]] | [[Category:Instrument repair reports]] | ||
Revision as of 03:48, 1 December 2023
Repair Issues
- If no LED or display segment is lit after trun on, check for +15 V from U500 Voltage regulator IC type 723.
- All ICs are placed in IC sockets. Contact problems can occur. Removing and inserting ICs may help temporarily.
- Check board is mounted to frame with plastic washers in between near pcb conductor tracks, otherwise a short to GND can occur.