Sansui G-5500: Bad Rectifier Blowing Fuses

This Sansui G-5500 came to me because it blows the 5A fuse as soon as you turn it on. Through some methodical troubleshooting, it turns out one of rectifier diode packs is bad. Not having a legitimate replacement on-hand, I cobbled together some diodes to confirm if that's the only problem.
00:00 Opening it Up
01:57 Failing to See Obvious Fuses
01:44 Looking Underneath
02:26 Initial Investigation
03:44 Testing Outlets
05:03 Testing Output Stage
06:11 Testing Filter Caps
08:37 Disconnecting the "Bad" Capacitor
09:18 Not a Bad Cap After All
11:18 Hunting the Short
13:38 Getting Warmer
14:54 Investigating the Rectifier
16:16 We have a Winner
17:03 Blowing Up some Diodes
18:19 WTF is That and Will it Actually Work?
19:18 First Successful Power On
20:48 First Sound Test
22:25 Outro
Useful products from the video:
• Toshiba 5151 Dual Diode Pack: ebay.to/3pTUosr
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• Pre-Fluxed Solder Wick: amzn.to/3lYAWIv
• Solder Sucker: amzn.to/337xCTT
• 15A Schottky Diodes: amzn.to/35Vf9ff
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[@maat8249]

Hello, I'm in the same situation myself with an AU-5500. One of the 7A fuses starts glowing and blows after the relay clicks. I suspect it's one of the rectifier diodes. Could you let me know how you went about measuring it once you pulled it out? My meter has a diode function, but for some reason it won't measure any diode on the board. I've had no success using the ohm meter either. Maybe I'm too stupid for this.

[@cilynx]

A functioning diode will pass current in one direction and not the other. You can do a continuity test and if swapping the leads gives you either continuity or not then your diode is basically working. Generally when they fail, they short in which case you'll have continuity no matter which way you put the test leads.
The diode packs in the rectifier have either the anodes or cathodes of the diodes connected together depending on which side of the bridge you're on. When testing the packs, test from each diode lead to the common frame.