Hi all,
This unit came in the shop today. Unit refuse to start. When pressing
power on, red led in power button flashes constantly, indicating a
problem. Never had this unit before. Any advice is appreciated.
A blown poweramp? Powersupply failure?

Best regards
The poweramp freak

"powerampfreak" wrote in message
oups.com...
Hi all,
This unit came in the shop today. Unit refuse to start. When pressing
power on, red led in power button flashes constantly, indicating a
problem. Never had this unit before. Any advice is appreciated.
A blown poweramp? Powersupply failure?

Best regards
The poweramp freak


Is this one of the units that has the glass display unit that sits on top?
If so, the most likely cause of the problem is bad caps and bad joints on
the transistors in the VFD multiplier module. This unit is located
immediately behind the socket that goes out to the display unit, and is
inside a metal can. Failure of those caps is common on models using the
external display. I have also had fan failure on a couple of units from the
XC-L series, which has resulted in just about all of the electrolytic caps
in the output stages, located under the heatsink, drying out and failing.

Arfa

On 29 Mar, 01:46, "Arfa Daily" wrote:
"powerampfreak" wrote in message

oups.com...

Hi all,
This unit came in the shop today. Unit refuse to start. When pressing
power on, red led in power button flashes constantly, indicating a
problem. Never had this unit before. Any advice is appreciated.
A blown poweramp? Powersupply failure?

Best regards
The poweramp freak

Is this one of the units that has the glass display unit that sits on top?
If so, the most likely cause of the problem is bad caps and bad joints on
the transistors in the VFD multiplier module. This unit is located
immediately behind the socket that goes out to the display unit, and is
inside a metal can. Failure of those caps is common on models using the
external display. I have also had fan failure on a couple of units from the
XC-L series, which has resulted in just about all of the electrolytic caps
in the output stages, located under the heatsink, drying out and failing.

Arfa

Thanks for your advice. This will be checked promptly.

Reagrds
Steve

On 29 Mar, 05:55, "powerampfreak" wrote:
On 29 Mar, 01:46, "Arfa Daily" wrote:





"powerampfreak" wrote in message

roups.com...

Hi all,
This unit came in the shop today. Unit refuse to start. When pressing
power on, red led in power button flashes constantly, indicating a
problem. Never had this unit before. Any advice is appreciated.
A blown poweramp? Powersupply failure?

Best regards
The poweramp freak

Is this one of the units that has the glass display unit that sits on top?
If so, the most likely cause of the problem is bad caps and bad joints on
the transistors in the VFD multiplier module. This unit is located
immediately behind the socket that goes out to the display unit, and is
inside a metal can. Failure of those caps is common on models using the
external display. I have also had fan failure on a couple of units from the
XC-L series, which has resulted in just about all of the electrolytic caps
in the output stages, located under the heatsink, drying out and failing.

Arfa

Thanks for your advice. This will be checked promptly.

Reagrds
Steve- Dölj citerad text -

- Visa citerad text -

Hello Arfa!

I opened the unit to check the VFD module. Then I saw some jumpers
marked "service".
Those were shorted during insertion of mains cord, and the unit
started up correctly. Hmm....
The display looked fine, though I don't know if the power amp operates
properly..
Does the above tell you anything?

Best regards,
Steve

"powerampfreak" wrote in message
oups.com...
On 29 Mar, 05:55, "powerampfreak" wrote:
On 29 Mar, 01:46, "Arfa Daily" wrote:





"powerampfreak" wrote in message

roups.com...

Hi all,
This unit came in the shop today. Unit refuse to start. When pressing
power on, red led in power button flashes constantly, indicating a
problem. Never had this unit before. Any advice is appreciated.
A blown poweramp? Powersupply failure?

Best regards
The poweramp freak

Is this one of the units that has the glass display unit that sits on
top?
If so, the most likely cause of the problem is bad caps and bad joints
on
the transistors in the VFD multiplier module. This unit is located
immediately behind the socket that goes out to the display unit, and is
inside a metal can. Failure of those caps is common on models using the
external display. I have also had fan failure on a couple of units from
the
XC-L series, which has resulted in just about all of the electrolytic
caps
in the output stages, located under the heatsink, drying out and
failing.

Arfa

Thanks for your advice. This will be checked promptly.

Reagrds
Steve- Dölj citerad text -

- Visa citerad text -

Hello Arfa!

I opened the unit to check the VFD module. Then I saw some jumpers
marked "service".
Those were shorted during insertion of mains cord, and the unit
started up correctly. Hmm....
The display looked fine, though I don't know if the power amp operates
properly..
Does the above tell you anything?

Best regards,
Steve

Not really, except if the display is now working correctly, then the VFD
supply module is not the cause of any problems. I'm not sure what you mean
about whether the power amp operates correctly or not. If the unit now fully
powers, with no error indications, and the speakers produce sound, then the
assumption would have to be that the power amp is indeed working correctly
??

Arfa

On 30 Mar, 02:13, "Arfa Daily" wrote:
"powerampfreak" wrote in message

oups.com...
On 29 Mar, 05:55, "powerampfreak" wrote:





On 29 Mar, 01:46, "Arfa Daily" wrote:

"powerampfreak" wrote in message

roups.com...

Hi all,
This unit came in the shop today. Unit refuse to start. When pressing
power on, red led in power button flashes constantly, indicating a
problem. Never had this unit before. Any advice is appreciated.
A blown poweramp? Powersupply failure?

Best regards
The poweramp freak

Is this one of the units that has the glass display unit that sits on
top?
If so, the most likely cause of the problem is bad caps and bad joints
on
the transistors in the VFD multiplier module. This unit is located
immediately behind the socket that goes out to the display unit, and is
inside a metal can. Failure of those caps is common on models using the
external display. I have also had fan failure on a couple of units from
the
XC-L series, which has resulted in just about all of the electrolytic
caps
in the output stages, located under the heatsink, drying out and
failing.

Arfa

Thanks for your advice. This will be checked promptly.

Reagrds
Steve- Dölj citerad text -

- Visa citerad text -

Hello Arfa!

I opened the unit to check the VFD module. Then I saw some jumpers
marked "service".
Those were shorted during insertion of mains cord, and the unit
started up correctly. Hmm....
The display looked fine, though I don't know if the power amp operates
properly..
Does the above tell you anything?

Best regards,
Steve

Not really, except if the display is now working correctly, then the VFD
supply module is not the cause of any problems. I'm not sure what you mean
about whether the power amp operates correctly or not. If the unit now fully
powers, with no error indications, and the speakers produce sound, then the
assumption would have to be that the power amp is indeed working correctly
??

Arfa- Dölj citerad text -

- Visa citerad text -

Arfa, sorry for making you confused.
I didn't check if the unit does output any sound yet...
I just wonder how the set could start as soon as I shorted the service
pins?
Does this clear any internal error codes or something?
I don't feel comfortable returning the unit to customer without
finding any problem, except
for shorting the service pins...
Do you know anything that can set or cause an "error-detect" to the
processor? Like dc from poweramp and such..

Regards,
Steve