I'm also looking for the service manual for the Adam P33A speaker. I have a problem with the mid output on one of my speakers. If you could PM me with a message and I'll give you my email address it would be much appreciated. Thanks!
Hello Dulcendo,
Please don't post more than one time. We have to clear your post from the moderation queue and, as volunteers, we're not always immediately available.
Thank you,
p11a
Dear as_audio
Do you still have the file for the p11a service manual? I'm looking to fix the transformer on one of my units and I'm thinking this schematic will help.
Dear as_audio
Do you still have the file for the p11a service manual? I'm looking to fix the transformer on one of my units and I'm thinking this schematic will help.
Gentlemen, again, whoever needs a manual has to send me a private message.
This should contain his e-address in the first place.
Repair success with errors unknown before should be reported here, thanks.
This should contain his e-address in the first place.
Repair success with errors unknown before should be reported here, thanks.
All went well on the p11a- the transformer developed a fault and was replaced by two series linked transformers to step down to the correct voltages - see photo for the voltage steps - Thanks for the schematic
Attachments
What was the problem - open primary? Then I'd guess the thermal fuse went. I can't imagine something sourced from Hypex (even if it was 15 years ago) would have been too inexpensive, that may have been worth finding someone who works on transformers for. Anyway, as long as you managed to cram everything back in there...
BTW, two "series linked" transformers? I assume you mean two in parallel, one for 27-0-27 and one for 16-0-16 secondaries?
P11a coupling capacitor specification
Many thanks to as_audio for the P11a schematic. One of my speakers was faulty, both drivers were working but very little bass from the main driver. All 4 coupling capacitors (22uF 50v) were faulty - very high ESR in excess of 100 ohms and once removed from the circuit the capacitance ranged between 0.5 - 2uF on each. I have temporarily replaced these with 33uF 50v (all I had in stock) and everything sounds great again.
I have since tested the same 4 caps on the other speaker (this still works) and the ESR again is very high. I have not removed from circuit yet to test capacitance.
The question is, why have all of these failed and should I replace them with a different spec electrolytic?
All the other caps seem to be in good visual condition with low ESR (in circuit), apart from the two 10,000uF caps which were all bulging but still working.
Many thanks
Many thanks to as_audio for the P11a schematic. One of my speakers was faulty, both drivers were working but very little bass from the main driver. All 4 coupling capacitors (22uF 50v) were faulty - very high ESR in excess of 100 ohms and once removed from the circuit the capacitance ranged between 0.5 - 2uF on each. I have temporarily replaced these with 33uF 50v (all I had in stock) and everything sounds great again.
I have since tested the same 4 caps on the other speaker (this still works) and the ESR again is very high. I have not removed from circuit yet to test capacitance.
The question is, why have all of these failed and should I replace them with a different spec electrolytic?
All the other caps seem to be in good visual condition with low ESR (in circuit), apart from the two 10,000uF caps which were all bulging but still working.
Many thanks
Some of the caps are close to heat sinks in this and other models.
I usually try to replace with new caps an a way so that they have
a bigger distance to the hot surface, using long wires of a fresh cap.
I usually try to replace with new caps an a way so that they have
a bigger distance to the hot surface, using long wires of a fresh cap.
I bought Adam p22a monitors untested and got burned. One amplifier made smoke when powered. Now, it is all good. Both monitors work and I am happy with the sound.
First big thanks to user as_audio for schematics.
Here is what I learned about the p22a.
There are at least two different models sold as p22a.
The analog model where the amplifier runs on two chip-amps (TDA 7293). Also many NE5532 op-amps.
The digital model based on ICE amps.
The analog model does not have any extra air holes for cooling on the back metal plate.
The digital has cooling holes on the back.
At least the analog model was fixable. It does not contain any surface mounted components. Some tracks on the circuit board were burned and had to be replaced with patches. It took 3 hours to for repairmen to fix my amp. At least parts were cheap. The chip-amps are only 5 eur each. It is funny that the fine monitor runs on this 5 euro amplification. I found references that for example Linn used these in many amps.
First big thanks to user as_audio for schematics.
Here is what I learned about the p22a.
There are at least two different models sold as p22a.
The analog model where the amplifier runs on two chip-amps (TDA 7293). Also many NE5532 op-amps.
The digital model based on ICE amps.
The analog model does not have any extra air holes for cooling on the back metal plate.
The digital has cooling holes on the back.
At least the analog model was fixable. It does not contain any surface mounted components. Some tracks on the circuit board were burned and had to be replaced with patches. It took 3 hours to for repairmen to fix my amp. At least parts were cheap. The chip-amps are only 5 eur each. It is funny that the fine monitor runs on this 5 euro amplification. I found references that for example Linn used these in many amps.
ADAM S3XH Service Manual
.. was submitted thanks to a forum user.
6 MB exceed the attachment limit, so ask by pm ..
.. was submitted thanks to a forum user.
6 MB exceed the attachment limit, so ask by pm ..
any chance someone could send me the P22a schematic? Have one that's buzzing, I'm assuming it's the main filter caps but would love to have the diagrams as well.
Gentlemen, I think about deleting all pms asking for schematics but without email address.
See post 27.
See post 27.
Many thanks to as_audio for the schematics. I had a pair of p22a’s that were low output and one tweeter was barely outputting. Mine were the version p22a. My tech pal replaced the input capacitors, and power supply capacitors. That brought them back to life. Now I’m getting an imbalance in high gain volume. I’m having to turn down one speakers high gain pot all the way to match the other speaker with its high gain turned all the way up. It sounds like a boost in the 2k range. Any thought what this could be? Out of tolerance resistors?
2k could be tweeter fundamental resonance, indicating very high output impedance - check everything in between amplifier output and tweeter, including the tweeter itself.