Author Topic: Well, messy mod on something I got off eBay  (Read 601 times)

GohanX

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Re: Well, messy mod on something I got off eBay
« Reply #15 on: August 06, 2015, 05:57:21 AM »
Wow, just f*cking wow. Wonder what kinda iron they used to do that shit. I think you over paid. I'd ask for a refund.
I've got five bucks that says 45 watt Radio Shack iron.

wilykat

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Re: Well, messy mod on something I got off eBay
« Reply #16 on: August 10, 2015, 02:41:49 PM »
Good news and bad news:

cap kit from console5 arrived so I got all but 5 installed.  One near video circuit at C502, I still haven't figured where the + lead goes. and 4 around audio jack with fouled up pads.  The jack fell apart when I was trying to clean brown residue out, I guess it melted too much by the noob idiot so I need to order new jack.

C604 by HuC6260 was another hard spot. The lifted trace had too little remaining for me to tap in. I looked on TG-16 schematic for the same cap connected to 6260 and found it connected to 43 and 46 so I tapped the + lead of the cap to one of that pin.  I hope it is the right pin since other cap were checked and I was able to verify correct pins to cap pads.  It is only pin 43 and 46 that seems "lost".

Once I figure where the +lead for C502 goes, I can put it back together and see if it works (without sound naturally) and how much more work I'd need to do.

Still wishing someone has Turboexpress or GT schematic so I can fix the sound now.  TG-16 doesn't have headphone jack or internal speaker and has different arrangement.

NightWolve

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Re: Well, messy mod on something I got off eBay
« Reply #17 on: August 10, 2015, 05:20:39 PM »

2 missing caps, lifted or damaged pads, and melted audio out jack  #-o

Poor thing... :(

wilykat

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Re: Well, messy mod on something I got off eBay
« Reply #18 on: August 10, 2015, 10:44:31 PM »
Yes poor thing. It may never play violin again but hopefully I won't have to use the phrase "He's dead, Jim"

I figured out where all the remaining caps are supposed to go in. The + lead appears to go to the tab of D501 on the other side.  Next I'll doubl check all the caps to make sure it's soldered in firmly, correct orientation, not touching anything it's not supposed to touch, and no bridges or rogue solder blobs and to check if there's any short between 5v and ground.  I still need to clean up the new solder flux and I am out of distilled water so the last step will need to wait. (and still waiting on new jacks, ETA end of August, NEC had to use uncommon design that isn't easily found locally after 20 years)

Also put in a new fuse.  All that's left is to plug the LCD panel back and power it on.