Re: Philips HTB5580 No Standby LED - Not Power ON!
Sorry, don't have that !...
Perce2
Member
Last Activity: 10-25-2017, 11:37 AM
Joined: 10-22-2017
Location: Phuket
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Re: Philips Power Supply - No output voltages!
Checked the voltage as suggested, only getting around 3.5mV.
If the MCU is controlling the fan would there be a voltage there all the time ?
Surely a voltage would only be present when the fan should be on, if controlled by temp or something ?
Left it switched on for quite some time, fan didn't start up.
Is there a way to check the MCU ?
Attached diagram showing what I get:
Amp PCB:
[ATTACH]165117[/ATTACH]
[ATTACH]165116[...Last edited by Perce2; 10-25-2017, 05:52 AM.Leave a comment:
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Re: Philips HTB5580 No Standby LED - Not Power ON!
Done a bit more research on the amp 12v fan, but not sure where to start testing.
Can confirm the fan actually works fine, hooked it up to a 12v supply to confirm.
There is no 12+v at the small connector plug on the amp board (only 3.5mV).
Rest of the amp is working fine, main board supply of 34v.
Have a circuit diagram if it helps - [ATTACH]165089[/ATTACH]
Thanks for any comments.
Image showing the amp with fan
[ATTACH]165088[/ATTACH]Re: Philips HTB5580 No...Leave a comment:
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Re: Philips Power Supply - No output voltages!
Many thanks budm...
Any idea regarding the 12v fan ?
Can confirm the fan actually works fine, hooked it up to a 12v supply to confirm.
There is no 12+v at the small connector plug on the board (only 3.5mV).
Rest of the amp is working fine.
Have a circuit diagram if it helps - [ATTACH]165084[/ATTACH]
Thanks for any comments.
Image showing the amp with fan
[ATTACH]165086[/ATTACH]Re: Philips Power Supply - No output voltages!
Many thanks...Leave a comment:
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Re: Philips HTB5580 No Standby LED - Not Power ON!
Must be the photo, all soldering in that area (6 pins) looks good and the large cap CE502 looks as new.
Swapped out D509, D510 + ZD505 and now we have power !
All power rails are back up at the correct voltages.
The only problem I now see is the small 12v extraction fan fed from the amplifier board is not working. Checked voltage at the fan feed plug only showing something like 0.0035v.
Could this be fed from some thermo device that only runs at a certain...Leave a comment:
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Re: Philips Power Supply - No output voltages!
Swapped out D509, D510 + ZD505 and now we have power !
All power rails are back up at the correct voltages.
The only problem I now see is the small 12v extraction fan fed from the amplifier board is not working. Checked voltage at the fan feed plug only showing something like 0.0035v.
Could this be fed from some thermo device that only runs at a certain temperature or should it run all the time the amp is on ?
Many thanks for the advice so far guy's......Leave a comment:
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Re: Philips Power Supply - No output voltages!
Hi budm, have already replied to your suggestions in my other post over in the Audio. Thanks again for your time....Leave a comment:
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Re: Philips Power Supply - No output voltages!
Have removed the cap's, tested with both ESR + Capacitance meter, tested fine. As I don't have any spare parts, I only originally ordered and replaced the parts that were out of acceptable tolerances except for the 2 IC's which I just replaced even though they tested ok.
I have now ordered in those small cap's to swap out.
Large diodes have also tested ok. The zener's I have already but didn't think it necessary to change as they also tested ok. As you suggest I'll also swap them out too. Any one...Leave a comment:
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Re: Philips HTB5580 No Standby LED - Not Power ON!
Hi budm, thanks for your quick reply.
The two cap's that are with the TNY are CE510 10uf + CE511 47uf
I 've had them both out, checked with ESR + Capacitance meter, tested OK.
You think I should still replace them ?
TNY Voltages:
Drain - 280v
BP/M - 5.81v
EN/UV - 1.33v
Circuit Diagram:
[ATTACH]165015[/ATTACH]...Leave a comment:
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Philips Power Supply - No output voltages!
Having an issue trying to get my home-theater to power up, pretty sure it's a power supply related problem.
Here's where I'm at, stuck with what to check next...
Philips HTB5580/98 Home Theater, 18months old.
Problem - Not power up!
Symptoms - Problem started with unit not powering up sometimes, or only staying on for around 2mins. Then turned off with no standby LED.
Got worse, now not power up and no standby LED.
Remove power, replace and standby LED only stays on for around 1 - 2 seconds.
Local AC voltage should be 220v...Last edited by Perce2; 10-23-2017, 11:35 AM. -
Philips HTB5580 No Standby LED - Not Power ON!
Hi guy's, have a problem with my home-theater which is really testing my limited knowledge.
If anyone can assist I would really appreciate their help...
Philips HTB5580/98 Home Theater, 18months old.
Problem - Not power up!
Symptoms - Problem started with unit not powering up sometimes, or only staying on for around 2mins. Then turned off with no standby LED.
Got worse, now not power up and no standby LED.
Remove power, replace and standby LED only stays on for around 1 - 2 seconds.
Local AC voltage should be 220v - we only ever... -
Joining in from SE Asia!
Came across the forum whilst looking for help with my Philips HTB5580 Home -Theater. Hope to find tips and pointers for this and other problematic electronic equipment I'm so unlucky to own!Leave a comment:
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