HI
First off - can I say how impressed I was with this Kit - I’ve been building electronics for the past 45 years, and it was a delight to see how clear everything was and how well it all fitted together!
Two questions
re LED LD4 - on my board it flashes briefly when power is applied but then stays unlit - is this normal ?
re equalisation, is it possible to store the equalisation settings - I have the board set so that, on power-up, it goes straight into random play (excellent) - but can I also store the EQ settings in this way ?
[quote]1) - re LED LD4 - on my board it flashes briefly when power is applied but then stays unlit - is this normal ?[/quote]This is not normal. How long time the LD4 flashes every time you turn power on?
BTW: Do you have the LCD version of the player? Does the LCD backlight flash too?
[quote]2) - re equalisation, is it possible to store the equalisation settings - I have the board set so that, on power-up, it goes straight into random play (excellent) - but can I also store the EQ settings in this way ?[/quote]Yes, you can save the EQ settings:
The settings are saved by pushing the SW1 button for a long time until all the LEDs and the LCD backlight is off. This saves all the settings.
Then turn the power off.
Next time you turn the power on the previous EQ setting is used.
[quote=“VEL255”][quote]1) - re LED LD4 - on my board it flashes briefly when power is applied but then stays unlit - is this normal ?[/quote]This is not normal. How long time the LD4 flashes every time you turn power on?
The briefest flash you could imagine - the led doesn’t even seem to reach full intensity.
Maybe I have the led in back to front and it’s lighting from some initial switch-on ‘surge’ condition? It lights for a longer period when power is disconnected…
BTW: Do you have the LCD version of the player? Does the LCD backlight flash too?
Yes - I have the LCD, backlight on the LCD lights steadily - no problem there
[quote]2) - re equalisation, is it possible to store the equalisation settings - I have the board set so that, on power-up, it goes straight into random play (excellent) - but can I also store the EQ settings in this way ?[/quote]Yes, you can save the EQ settings:
The settings are saved by pushing the SW1 button for a long time until all the LEDs and the LCD backlight is off. This saves all the settings.
Then turn the power off.
Next time you turn the power on the previous EQ setting is used.[/quote]
Ah - great - thanks - that works well.
Excellent little kit - well done!
[quote]The briefest flash you could imagine - the led doesn’t even seem to reach full intensity.
Maybe I have the led in back to front and it’s lighting from some initial switch-on ‘surge’ condition? [/quote]Indeed, the minor LED flash may be due to the power supply output voltage rise time.
Maybe there are big electrolytic capacitors in the power supply and it takes some time to get the full voltage…
[quote]It lights for a longer period when power is disconnected…[/quote]This also indicates that it takes longer time for the power supply to reach the full voltage if it was longer time disconnected
Yes - very good - I just need to find a box for it now
[quote]Maybe I have the led in back to front and it’s lighting from some initial switch-on ‘surge’ condition? [/quote]Indeed, the minor LED flash may be due to the power supply output voltage rise time.
Maybe there are big electrolytic capacitors in the power supply and it takes some time to get the full voltage…
Understood - but I was questioing why the led isn’t lit all the time - the manual says ‘LD4 - Power indication, lights during operation’ - but it’s always ‘off’ during operation ?
No - I didn’t make it clear.
When you apply +12v the led flashes once very briefly.
When you disconnect the 12v it flashes once, but for a longer period.
To be honest it’s only a minor thing - but I was just wondering ‘why’ ?
You may do a test:
Keep the power supply on and disconnect and reconnect the power plug to the K8095.
Are there still the LED flashes seen ?[/quote]
Yes - that is what I am doing.
PSU is plugged into the mains, steady 12 volts, switching the MP3 on and off by connecting / disconnecting the positive wire to the output of the PSU
[quote=“VEL255”]The LCD backlight and the LD4 are in parallel. It is very strange why the LD4 flashes but not the LCD backlight.
BTW: Originally the LD4 and the LCD are designed as alternatives.
The purpose of the LD4 is to be a power on indicator if no LCD is connected.
You may remove the LD4 to get slightly more “power” to the LCD backlight - if you like.[/quote]
OK - thanks. I suspect that I’ve got the LED in back to front - but I may just remove it anyway as there is more than enough light from the LCD backlight…
I purchased this kit to use it as portable unit and an extension for my music system.
It’s a fine system and crystal clear sound. Only the TDA1517 stereo amplifier is very fast hot ( 60°-70°c. ), so i made a cooling sink myself to prevent a possible? overheat. Is this normal it gets so hot while running ? With the adjustment i made it is much “fresher” now… (between 30°-40°c. now.)
I think the heating is normal if the amplifier is delivering its maximum power output.
The TDA1517 is thermally protected. So it shouldn’t be damaged by overheating.
Anyhow: It is OK to use an external heat sink, especially if used in high temperature environment or if the unit is put to a tiny enclosure.
[quote=“VEL255”]I think the heating is normal if the amplifier is delivering its maximum power output.
The TDA1517 is thermally protected. So it shouldn’t be damaged by overheating.
Anyhow: It is OK to use an external heat sink, especially if used in high temperature environment or if the unit is put to a tiny enclosure.[/quote]I did this just to be sure, and to avoid burning the wooden enclosure…Anyway, thanks for the reaction so soon!!! Will make more kits with pleasure!!!
