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Sony HST-49 1980 Vintage AM/FM Cassette Stereo Repair. 

Farmradio
Подписаться 4,5 тыс.
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This was found to be in very abused non-functioning condition, on top of the usual age-related, high use, & Nicotine poisoning. One channel was inoperative. Tape buttons frozen. Radio not receiving well. After replacement of one output IC, cleaning pots, controls, re-flowing grounds, connections, etc. The main unit functions quite well again. The tape unit needed the usual re-lubrication in critical spots, along with a main drive belt. Update: Since the video, this unit has had considerable run time, & sounds fantastic. It's been pushed near it's 15W per channel for hours, without issue. The cassette player records & plays although the rubber is aged on the take-up, pinch roller, etc. It still works well & could only benefit from locating replacements for those pieces. The auto stop is also working properly now. All in all, a great unit for it's age, & came out well enough for the work done.

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4 авг 2020

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Комментарии : 24   
@TheLazarjoseb
@TheLazarjoseb Год назад
I have a hst-49A set trying repair and restore , thanks for the video.
@Farmradio
@Farmradio Год назад
You're welcome. This still could benefit from a new pinch roller, but that's for another time. Would have to remove, measure, & try to match a new tire. Thank you for watching!
@ssk2611
@ssk2611 3 года назад
Very nice stereo system
@lord_doomsday
@lord_doomsday 4 года назад
It is true that the glue gets very conductive when it gets old.
@Synthematix
@Synthematix 4 года назад
It can completely destroy everything if not removed, its evil stuff
@adumanter
@adumanter 4 года назад
Nice unit, well worth saving
@user-bu2te5bc4t
@user-bu2te5bc4t 3 месяца назад
I'm messing with one of these. I got it and one of the issues was the tuner string has fallen off. I'm not sure why but it seems to be intact. I found an old manual online that shows the routing but when I put it on that way, it seems too short. It won't give enough wraps around the tuning drum and that seems to be causing it to not be able to move the dial through the full range as it will bind up on itself it seems. It seems as though the string is too short but the manual called out a length and it appears to be the correct length. Do you have any thoughts on this? I didn't see a great view of this in your video but I saw enough that I'm pretty yours is getting another wrap around the tuning drum. Thanks!
@kuttukichu
@kuttukichu 3 года назад
I have a same set and planning to repair it. Your video gives me some inspiration now. Do you have the manual for radio part with diagnosis list table. ? Thank you.
@agostonbela
@agostonbela 4 месяца назад
Hi there! Can you share how long the longest (main) rubber belt on the cassette unit?
@Farmradio
@Farmradio 3 месяца назад
Really don't have an idea. Don't *think* I changed it.
@noah.hensley
@noah.hensley 2 года назад
I have the same receiver and I was wondering if you could help me. Sound only comes out of one speaker when both work fine. I can switch which speaker produces sound with the button on the left side of the device. I'm just wondering how to make sound come out of both at the same time?
@danielcepero3790
@danielcepero3790 8 месяцев назад
You are plugging both speakers to different channels. One to channel A and the other to channel B. Each channel has left and right, you gotta connect both to the same channel but left/right.
@shahzadgull1973
@shahzadgull1973 2 года назад
Sir outpost bord tr c1173 ralayted no ???? Ho no ralayted no ple raptly me
@rayislooking2
@rayislooking2 4 года назад
Hi Spraying make a mess and waste product Not easy to clean up either I use a dropper too. What does a cold solder joint look like? Nice work Thanks for sharing Just1
@Farmradio
@Farmradio 4 года назад
To me they look like a moon crater. Dull & cracked. Should be round & shiny.
@ricardomoran1951
@ricardomoran1951 2 месяца назад
Hola amigo, tengo un radio igual, solo que el transformador se daño, que valores de voltaje deberia dar en la salida o secundario, me podras dar ese dato para poder adaptarle uno.
@Farmradio
@Farmradio 2 месяца назад
Hola. Transformer has 2 secondaries. One center tapped winding provides the +28VDC, & -28VDC. out of full wave bridge D901, D902. #2 is 15VDC, out of D903. (2nd. winding). So the transformer will be less. Divided by 1.141. I believe. 20-0-20 secondary gives 28.2VDC So 19-0-19, a good guess for 28 I believe. #2 for the 15VDC, 10-11VAC x 1.414 for that. Hope this helps
@lord_doomsday
@lord_doomsday 4 года назад
Put the belt in cup of water and microwave for 10mins will give the belt a bit more life if you cannot replace the rubber belt.
@Farmradio
@Farmradio 4 года назад
Thank you for the tip. Will do.
@Synthematix
@Synthematix 4 года назад
Get rid of all that nasty glue mate
@Farmradio
@Farmradio 4 года назад
Noted. Will do.
@ssk2611
@ssk2611 Год назад
1370.1350ic
@ssk2611
@ssk2611 3 года назад
Pris kea hai
@rajaelectricals6081
@rajaelectricals6081 2 года назад
Hst 400 transformer need
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