Firstly: The PCB Version rev#7 is fully working. No Problems.

I’d done 2 ureis with rev#6 but the BC107 were shown the wrong way. No Problem, i bend one leg and it works. There are no Problems in rev#7.

That means, if your urei isn’t working...  you are the evildoer! :-))

BEFORE testing the urei, check the hole board on shorts and breaks!

shorts:
the urei is done on a eurocard pcb. very easy to do, but much populated with parts
so check if there are solder blobs!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
i’d found solder blobs and shorts at my urei! pay attention when soldering at the narrow conductor paths!

breaks:
mostly not so dramatically, but very hard to find.
if you’re  fed up with searching the fault, or you aren’t much expirienced with signal tracing and electronic generally :-) ... you should check every conductor path with your mulitmeter, measure! if there are breaks!

Maybe the red marked regions could cause problems...

Ok. I think you haven’t checked the board on shorts and breaks... because you are nervois.. and you wanted to know if the urei is working or not...

Because of that you are reading here...

I couldn’t explain every fault. So it is very useful to understand the schematics...
Please go to the how it works page... The urei is easy to understand.

Check the following:
-the power transformer preferably without a connection to the pcb! I’d got some power transormers with wrong voltages...so i ALWAYS check the voltages before everything

-Check if you are using the right voltage regulator and a “BF245 A” not “BF245 C” or so!

-If you couldn’t find BD517 and BD518 use BD135 and BD136 for the signal line amp power transistors but be careful, they aren’t pincompatible!

-If you are using any other components, check the pin compatibility!!!

-Ok. You have checked  everything.
Now switch it on...

Put your finger on the 7824 and check if its hot...
It should be warm - but not too warm
If your fingers melt away after 5 sec. this isn’t normal! :-)
If the 7824 is flying through your room it isn’t normal, two! (thanks Flo for testing this) :-))

Please check all voltages! -10V, +30V ... 24V against GND

If you have incorrect voltages... desolder the marked points in the picture below. So you could check, if there are already problems in the power supply or in the rest of the wiring.

I think the voltages are only wrong when the power supply is connected to the rest...
AND THE PROBLEM IS STILL SHORTS AND BREAKS - GO TO THE TOP OF THE PAGE! :-)
 

The following picture helps me to find the point at the original schematics

Complimentary Transistors
BD 135 and BD136 instead of BD517 and BD518

(one of the crossed legs is isolated)

If you want to use BD135 and BD136 you have to change the pins. Bend the legs and isolate one of the crossed legs! to prevent a short.

G1176/Urei 1176 Schematics

download the schematic of the 1176 inclusevely
the check voltages measured by Jacob “probably the best dane in the world” :-) ... and the designer of the G1176 pcb

Transistor check with the diode test function of multimeter

If you have problems with hum... try to cut the pcb traces as shown on the following picture: