I am trying to repair a WP-775B, 0 to 30 volt power supply, made by Vector-VID. My main problem is IC2 (14 pin DIP) is missing. The circuit board layout strongly suggests it is a quad op amp, but I can’t find a schematic to identify which op amp it is. This IC feeds the analog current and voltage meters, so I’d like to be reasonably sure which op amp to use so I won’t ‘smoke’ the meters.
My 1st guess is a LM324 because 24 VDC is on pins 7 and 11 and the unit appears to be built around the 90s. Also IC1 is a LM723.
Any ideas or suggestions would be greatly appreciated.
My 1st guess is a LM324 because 24 VDC is on pins 7 and 11 and the unit appears to be built around the 90s. Also IC1 is a LM723.
Any ideas or suggestions would be greatly appreciated.