Schematic For Echostar AD3000ip Power Supply

[Ray(str)]

Already been said Llew,
Thank You for this very helpful info!

Much appreciated,
Ray(str)

[Tony Kightley]

Hi Llew,

No, they are not bifilar wound, and to achieve such a high value, there are many turns of very fine wire. So, we will have to see how the one I have fitted behaves in use.

[Llew]

OK Tony, hope it's OK to use.

Llew

[daytek]

anyone one know where they purchased their components and the component number from the relevant supplier,i have 2 recievers with power supply faults one ad3000ip and ad3000ipvia both faulty from same area

R17 …1K 1/8W
Q5 … A1273
Q4… C3205
Q3… C3205
R23… 4.7K 1/8W
R3… 15K 2WF
C12… 4.7uF 50V
D2… ZD13
D3… ZD30
IC4… KA431AZ or KA431LZ

[Llew]

You will probably have to source the components from more than one supplier.

The resistors and capacitors shouldn't be a problem, try Farnell, RS, Maplins etc.

Q3/4 - 2SC3205 and Q5 2SA1273 (or BC640) Cricklewood Electronics

D2/3 - ZD13, ZD30 are zener diodes. Suitable replacements are BZX85-C13 and BZX85-C30 respectively. Farnell.

The shunt regulators KA431AZ/LZ may be difficult to obtain. The suffixes denote the output voltage % tolerance ( AZ=1%, LZ=0.5%) The one available from Farnell (KA431Z) is the 2% tolerance version, not sure how critical this component is in this circuit.

Llew

[daytek]

I would be grateful if we could compile a list with part numbers from the relevant suppliers,will make life easier and help alot of peoples,we could make it a sticky,for everyone to enjoy,an input from all who have fixed their boxes would be great,as this is still one of the best recievers around

[Llew]

Agreed, it would be of some help to those similarly inclined (or competent enough, always keeping in mind the safety aspects of repairing mains - powered equipment.)

Feel free to contribute, I'll do the same in due course, and as you suggest, make another sticky with the results.

Llew

[Llew]

I've now posted a sticky describing components and values, with possible sources.

Also, I've revised the diagrams, as during my component check I found some anomalies in the original diagrams.

Llew

[Iain Glass]

Can anyone help with my power supply? Output voltages are high 50v instead of 30v, 12v instead of 8v. Obviously to do with feedback circuitry? Voltage correct on C10 and C11. Changed IC1, IC3, all capacitors on primary side. System switches on, registers 1000 then channel number. After 15 seconds goes into oscillation, trying to switch off and on. Power switch has no effect.

[Llew]

Hi Iain. Quick guess -sounds like IC1 switch frequency is overrunning, causing higher voltages to the main supplies.

Have to check that one out

Llew

[Iain Glass]

I'm fortunate that I have 2 power supplies, one is o.k., the other is faulty as above. I thought that IC1 was faulty. Switching them over resulted in the fault staying with the faulty supply. Same result with IC3. I'm tempted to change out for new all the diodes and resistors surrounding IC1. I haven't checked out IC2. Really grateful for your feedback.

[Llew]

Check your 5V line. The feedback optocoupler IC2 should shut down IC1 with a ~50% increase in this voltage (which is what you are getting on the other lines).

Maybe a dud IC2.

Llew

[Iain Glass]

Thanks Llew. Going on holiday for a few days so it will have to wait until I get back. Will definitely let you know if it's IC2 or something else then,
Sincerely,
Iain

[reginald]

HI Ian My receiver as developed the same fault. The 8V as jumped to 18V the 12V to 24V but the 5V is still at 5V. Did you solve the fault ?
Cheers

[Llew]

Hi Reginald

Your problem is almost certain to be open circuit secondaries on these voltages, i.e. no load, causing the voltages to increase - possibly due to a disconnection or fault on these outputs within the receiver circuitry itself.

Unfortunately all voltage outputs with the exception of the +5V line are not regulated, so any variation in voltages there will not provide feedback to the primary supply and shut down the SMPS.

Llew

[reginald]

Hi Llew
The receiver would start up alright for about a minute then the psu would reset and then start to cycle at 2 second intervals. The 8V line was suppyling 18V which was causing the 5v reg on the main board to overheat. As only the 5V is regulated which feeds back to the primary then I guessed that must be to do with that. After studying your excellent schematic I opted for C16 the 5v smoothing capacitor. Swapped this and voltages have gone back to normal. I think that it was causing a ripple ie 5V then 0V then back and the primary side was boosting as the 5V dropped to zero volts down the half wave. I think I will swap a few more while I am it some look very tired. I think the overvoltage might have stressed them. R17 as cooked due to the 60V it had across it. Many thanks for a great schematic.

[Llew]

Good to hear you found the culprit. Yes, it can be misleading checking with a meter - a 'scope would have noticed that ripple.

As usual, electrolytics are the main cause of breakdown in hard-working SMPS.

Llew

[zerok]

Although not to be the model of my receiver, congratulation for the wonderful and great work Llew. On the other hand, I would like to know who have an Electronic schematic of Positioner with command the DiSEqC 1.0/Usals?. Or any other model to serve as reference.

Any help would be appreciated,
Zerok
[/email]

P.S.
I have a motosat DiSEqC 1.2 Made by DHAM ENG. It is with problems.

[Llew]

You mean a v-box? Don't know of anything for these myself.

BTW it's advisable not to post your email address (attracts spam).

Thanks for your comment re the schematic

Llew

[madeira1]

Ref AD3000IP
Llew could you please confirm values of Resistor - R3 and R17.

Thanks

Jana

[Llew]

R3 15K 2W (the power rating is a guess - I compared it for size with known rating values of similar resistors - use the largest that can be accommodated on the board).

R17 1K 1/8W

For a full component list see -

http://www.satellites.co.uk/satellit...00ip-smps.html

Llew

[madeira1]

Thnaks for your help.

[vlammie]

Hi Llew

Thanks for your work on the schematic diagrams of the SMPS. I had recently updated my receiver with new software etc. and had it work again perfect for me. Until a tikking sound came out of the receiver. It turned out that the R3 had "soldered itself out of the Printed Wiring Board". I was able to find things fast with your diagrams. Thanks again and hope I can use it again for a long period. AD-3000ip is a wonderfull receiver.

Thanks again.

Vlammie from Holland

[Llew]

Hi vlammie, welcome to the forum. Glad you found it useful. Yes, R3 is the main suspect in the supply after the electrolytics. My receiver is still in service regularly for driving my dish.

Llew

[pcsel]

I have an AD 3000IPVIA which I have had for years which has just lost the Horizontal channels, Checked the 13/18v switch and 18v isn't there, where's the pick off from the PSU for this please? Anyone seen this before on these models

Many Thanks in Advance

Paul