So, I managed to get a heap of vintage HIFI equipment on a community sales site in Australia (where I live), It consists of a turntable, couple decks, amp, tuner and an very nice Equaliser and to tie up a set of speakers(for $40).
However the Amplifier (Technics SV-Z1) was working brilliantly and was sounding pretty good. I wanted to go clean the pots today so I opened her up gave her a dusting and cleaning. When I went to pick the amp up, the ground cable got stuck under my foot and the amp fell on the right side (with the least components on it) probably 3 inches high, at the time I wasn't worried...I mean it should be fine, however I went inside, plugged it in and switched the power switch. Nope. Nothing. Dead. I've checked for burnt out components, loose wires, fuses, checked for power going into the amp (which there is) yet still no sign of life.
Any ideas? I'm not an electronics expert. But if you give me some advice it would be appreciated and I'll give it a go!
[UPDATE]
So the amp is playing Audio. The lights in the VU meters were not lighting, did some wiggling and got one to light yet not the other. The bulbs are enclosed in a housing (rather not take them out unless I have to) and I tested the resistance of the points and power, yet both bulbs (including the one that's on) show the same specs. Any ideas?
However the Amplifier (Technics SV-Z1) was working brilliantly and was sounding pretty good. I wanted to go clean the pots today so I opened her up gave her a dusting and cleaning. When I went to pick the amp up, the ground cable got stuck under my foot and the amp fell on the right side (with the least components on it) probably 3 inches high, at the time I wasn't worried...I mean it should be fine, however I went inside, plugged it in and switched the power switch. Nope. Nothing. Dead. I've checked for burnt out components, loose wires, fuses, checked for power going into the amp (which there is) yet still no sign of life.
Any ideas? I'm not an electronics expert. But if you give me some advice it would be appreciated and I'll give it a go!
[UPDATE]
So the amp is playing Audio. The lights in the VU meters were not lighting, did some wiggling and got one to light yet not the other. The bulbs are enclosed in a housing (rather not take them out unless I have to) and I tested the resistance of the points and power, yet both bulbs (including the one that's on) show the same specs. Any ideas?
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Old light bulbs and fuses regularly fail when these things happen. They can look good but measure bad.
Perhaps you mean Technics SU-Z1 but in any case, replacing miniature bulbs or those tiny festoon tubes is not simple and you most likely have to remove the meters, their covers and the bulbs to replace them, assuming you can find replacements that suit the odd AC voltages like 10 or 14V often used to power them. Tandy used to sell them, then we had to resort to Ebay and I don't see many around now. There are automotive panel globes but the current and heat is too much for this duty.
TECHNICS SU-Z1 SU-Z1K SCH Service Manual free download, schematics, eeprom, repair info for electronics
Simplest may be to leave well enough alone or convert to LED lighting after fitting a rectifier and suitable dropping resistors to suit the current rating of miniature white LEDs that are more common these days. Either way, if you haven't tackled small panel meters before, this entails a bit of delicate work with small tools and a clean work area with tray etc to prevent loss of small and so-o-o-o easily damaged parts like the meter movement, should you touch it for any reason. It's lot of effort for a 30 year old budget amplifier.
TECHNICS SU-Z1 SU-Z1K SCH Service Manual free download, schematics, eeprom, repair info for electronics
Simplest may be to leave well enough alone or convert to LED lighting after fitting a rectifier and suitable dropping resistors to suit the current rating of miniature white LEDs that are more common these days. Either way, if you haven't tackled small panel meters before, this entails a bit of delicate work with small tools and a clean work area with tray etc to prevent loss of small and so-o-o-o easily damaged parts like the meter movement, should you touch it for any reason. It's lot of effort for a 30 year old budget amplifier.
I've got the bulb out (took around 5 minutes) and made sure not to touch the meters and both are still functioning well. The bulb is very unique and read on another forum of a guy looking for the bulb, in which he found
"they are fuse lamp bulbs, possibly 8v 250mA."
Although the ones I can find don't have the tails on the end and are too fat.
Here's a pic of the bulb:
I would really like an identical bulb if anyone has any ideas!
Thanks, Dan.
"they are fuse lamp bulbs, possibly 8v 250mA."
Although the ones I can find don't have the tails on the end and are too fat.
Here's a pic of the bulb:
An externally hosted image should be here but it was not working when we last tested it.
I would really like an identical bulb if anyone has any ideas!
Thanks, Dan.
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(UPDATE)
So I couple weeks ago I purchased a fuse globe which turned out to light up but was to big to fit in the original holder clasps.
As I didn't want to bend the clips, I messaged the seller what they suggested.
I've now installed a 5mm 9v Axial globes and wrapped the wires around the posts! And I'm pleased to say it works! Everything's working the way it should.
Hope this post helps people with the same or similar issues.
So I couple weeks ago I purchased a fuse globe which turned out to light up but was to big to fit in the original holder clasps.
As I didn't want to bend the clips, I messaged the seller what they suggested.
I've now installed a 5mm 9v Axial globes and wrapped the wires around the posts! And I'm pleased to say it works! Everything's working the way it should.
Hope this post helps people with the same or similar issues.
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