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Post by antonio on May 24, 2020 14:25:49 GMT
Nobody sees the base Scotty, good work.
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Deleted
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Post by Deleted on May 25, 2020 12:21:54 GMT
I think I'm going to go against the grain and install the terminal blocks for the inputs.
Reason being I may "experiment" with cabling just in case there's any noise picked up so it's going to make trying things a darn site easier....
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Post by karma67 on May 25, 2020 13:00:03 GMT
that sounds like a wise move.
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Bigman80
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Post by Bigman80 on May 25, 2020 13:09:44 GMT
I think I'm going to go against the grain and install the terminal blocks for the inputs. Reason being I may "experiment" with cabling just in case there's any noise picked up so it's going to make trying things a darn site easier.... That's cool... |
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Post by Deleted on May 27, 2020 15:32:46 GMT
Well I guess it's good news and bad news. Good news is it didn't go bang, bad news is it didn't do anything.....
AC power is on to the board so I will have to start probing around...
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Bigman80
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Post by Bigman80 on May 27, 2020 15:33:14 GMT
Well I guess it's good news and bad news. Good news is it didn't go bang, bad news is it didn't do anything..... AC power is on to the board so I will have to start probing around... Oh.....that's a pisser. Valves light up? |
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Post by Deleted on May 27, 2020 15:43:47 GMT
Nope, nothing. A pisser indeed. I realise others have asked before for circuit diagrams so I guess there's no change there??
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Bigman80
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Post by Bigman80 on May 27, 2020 15:58:52 GMT
Nope, nothing. A pisser indeed. I realise others have asked before for circuit diagrams so I guess there's no change there?? I will PM you |
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Post by Deleted on May 27, 2020 16:06:25 GMT
Cheers Oli. Any starters for 10 would be much appreciated....
There's nothing else connected, no input or outputs but assume it should appear lifelike regardless? The HV and LV entering the board is fine.
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Bigman80
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Post by Bigman80 on May 27, 2020 16:08:40 GMT
Cheers Oli. Any starters for 10 would be much appreciated.... There's nothing else connected, no input or outputs but assume it should appear lifelike regardless? The HV and LV entering the board is fine. Absolutely......are the LEDs on? |
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Bigman80
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Post by Bigman80 on May 27, 2020 16:11:55 GMT
Wired up like this?  |
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Post by Deleted on May 27, 2020 16:14:11 GMT
Yep AC going in is fine, nope, LEDs don't light up
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Bigman80
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Post by Bigman80 on May 27, 2020 16:24:27 GMT
Yep AC going in is fine, nope, LEDs don't light up Hmm....need pics |
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Post by Deleted on May 27, 2020 16:33:04 GMT
What of? If I spot owt wrong I'll let you know but mains in is ok.... If you have some typical voltages to be found let me know and I'll check the specifics
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Post by firebottle on May 27, 2020 16:37:10 GMT
Try it without the valves first and check that you have around 7.7 to 7.8V across pins 4 & 5 of the valve sockets.
If so heater reg is OK.
Then measure from either 4 or 5 to the ground (output or input connection) and if the HT is correct you should measure 55-60V, this is the heater lift potential. If you get less or nothing there is a problem with the HT reg/filter, the IFR820 stage.
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Post by Deleted on May 27, 2020 16:58:22 GMT
Try it without the valves first and check that you have around 7.7 to 7.8V across pins 4 & 5 of the valve sockets. If so heater reg is OK. Then measure from either 4 or 5 to the ground (output or input connection) and if the HT is correct you should measure 55-60V, this is the heater lift potential. If you get less or nothing there is a problem with the HT reg/filter, the IFR820 stage. All that appears ok, albeit that the heater voltages are perhaps a bit higher at 8.xV |
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Post by firebottle on May 27, 2020 17:26:43 GMT
So when you plug your valves in do they light up?
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Post by Deleted on May 27, 2020 17:28:18 GMT
Nope, not so far but will put them back now :-)
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Bigman80
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Post by Bigman80 on May 27, 2020 17:34:11 GMT
Nope, not so far but will put them back now :-) *popcorn* |
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Post by firebottle on May 27, 2020 17:47:51 GMT
8V sounds high for the heater voltage, check the 2.7V zener.
Try plugging one valve in to see if it lights.
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Post by Deleted on May 27, 2020 17:54:42 GMT
Ok will try that now. With all three back they didn't light, nor do the MM LEDs
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Bigman80
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Post by Bigman80 on May 27, 2020 17:56:41 GMT
This is very strange.
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Post by Deleted on May 27, 2020 17:57:03 GMT
okey doke with just V3 it lights up, want me to try the others individually?
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Bigman80
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Post by Bigman80 on May 27, 2020 18:00:59 GMT
okey doke with just V3 it lights up, want me to try the others individually? Check your emails, Martin. |
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Post by Deleted on May 27, 2020 18:06:13 GMT
ok All there valves light individually and with V1 in the LEDs light too
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Bigman80
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Post by Bigman80 on May 27, 2020 18:07:45 GMT
ok All there valves light individually and with V1 in the LEDs light too Ok, just not all together? |
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Post by Deleted on May 27, 2020 18:12:16 GMT
Yeah, tried v2 + V3 and nada.
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Post by firebottle on May 27, 2020 18:14:37 GMT
Check the voltage, 2.7V zener. Sound like the heater reg might be going into current limit.
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Post by Deleted on May 27, 2020 18:37:29 GMT
ok 2.8v with V1, 2.8v with V1 and V2, 0.8v with V1, V2 and V3.
Oh and with 2.8v, V1 and V1+V2 light
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Post by Deleted on May 28, 2020 16:36:21 GMT
Ok thought I'd have another play and decided to change out the 7805 just in case but then on switch on I think in messing I've shorted it and ****** it up so need to take it out again. This board won't be worth a light soon... :-)
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