Hi guys,
I’m trying to repair an Astec 699-0389 from a Macintosh II. The primary section of the power supply is completely blown, probably due to leakage from capacitor C5.
I definitely need to replace the bridge rectifier TR1 and VDR1. My doubt is about the TR1 and VDR1 (under the burned) area components: what should I replace them with?
I should probably also check R3, which seems to be fine, but I don’t know its original value... The rest of the power supply seems to be in good condition, but it still needs to be checked once the primary section has been repaired.
Do you have any suggestions ?
Schematics in attachments
I’m trying to repair an Astec 699-0389 from a Macintosh II. The primary section of the power supply is completely blown, probably due to leakage from capacitor C5.
I definitely need to replace the bridge rectifier TR1 and VDR1. My doubt is about the TR1 and VDR1 (under the burned) area components: what should I replace them with?
I should probably also check R3, which seems to be fine, but I don’t know its original value... The rest of the power supply seems to be in good condition, but it still needs to be checked once the primary section has been repaired.
Do you have any suggestions ?
Schematics in attachments
