Hi Kumar,
hard to tell from here what the problem might be. What happened once you connected it and switched on? Did the LED light up for a short time? Did it smell? Did you hear something that could indicate a problem? Did something happen during the transport? Did it fall down? Did you transport it on a pretty uneven road?
It could simply be the power adapter. Check the voltage and polarity with a meter. Also check if the connection is solid. If the adapter fails, get a new one with the exact same parameters regarding voltage, +/- polarity and power in mA. The mA value may be higher but not lower.
If it's not the adapter, disconnect the piano, open it up. I do not know exactly what the PN 70 looks like from the inside, but I guess you might have to open a metal box to find the main board.
It could be a blown fuse, though I don't think there are fuses because it's adapter driven. If a fuse is blown, this might have been a problem from outside (wrong voltage) or a short on the amp board. Change the fuse(s) and see what happens. Only use the recommended type of fuse(s), it's usually written on the board or the fuse holder. If you use the wrong type severe damage can happen to components that are still working.
If the fuses are ok (if there are any) check if all wiring is still in the right place (transport vibrations?). Look if something looks burnt. Look first at the amplifier IC that usually is attached to a large heat sink. It could also be a voltage regulator, also attached to a heat sink. A lot more could have gone wrong, so one should check this with proper equipment, starting by checking the voltages inside.
If the LED still lights up and you just don't hear anything, connect the piano to a MIDI device to check if the keyboard is working. If so, check if MIDI is set to LOCAL OFF. Look in the Owner's Manual to set MIDI to LOCAL ON. Alternatively check with proper equipment (oscilloscope) if there is output from the D/A converter. To find it, check the types of ICs (look for a rather small one) and do a search "datasheet XYZ123456". Then trace the signal and see which component blocks it.
Hi Kumar,
hard to tell from here what the problem might be. What happened once you connected it and switched on? Did the LED light up for a short time? Did it smell? Did you hear something that could indicate a problem? Did something happen during the transport? Did it fall down? Did you transport it on a pretty uneven road?
It could simply be the power adapter. Check the voltage and polarity with a meter. Also check if the connection is solid. If the adapter fails, get a new one with the exact same parameters regarding voltage, +/- polarity and power in mA. The mA value may be higher but not lower.
If it's not the adapter, disconnect the piano, open it up. I do not know exactly what the PN 70 looks like from the inside, but I guess you might have to open a metal box to find the main board.
It could be a blown fuse, though I don't think there are fuses because it's adapter driven. If a fuse is blown, this might have been a problem from outside (wrong voltage) or a short on the amp board. Change the fuse(s) and see what happens. Only use the recommended type of fuse(s), it's usually written on the board or the fuse holder. If you use the wrong type severe damage can happen to components that are still working.
If the fuses are ok (if there are any) check if all wiring is still in the right place (transport vibrations?). Look if something looks burnt. Look first at the amplifier IC that usually is attached to a large heat sink. It could also be a voltage regulator, also attached to a heat sink. A lot more could have gone wrong, so one should check this with proper equipment, starting by checking the voltages inside.
If the LED still lights up and you just don't hear anything, connect the piano to a MIDI device to check if the keyboard is working. If so, check if MIDI is set to LOCAL OFF. Look in the Owner's Manual to set MIDI to LOCAL ON. Alternatively check with proper equipment (oscilloscope) if there is output from the D/A converter. To find it, check the types of ICs (look for a rather small one) and do a search "datasheet XYZ123456". Then trace the signal and see which component blocks it.
Hope this helps. Good luck!
Ulf