Hi, friend,
I have the Marantz CD-84 CD Player.
All in normal conditions except the CD Player does not output audio. After I checked pin 22 on 2 TDA 1540D ICs, it turned out that there was no signal at all. Is there another IC that has a problem so that 2 1540D ICs don't work normally?
I don't know what's going on - can anyone help?
Thank you,
Ahmad
I have the Marantz CD-84 CD Player.
All in normal conditions except the CD Player does not output audio. After I checked pin 22 on 2 TDA 1540D ICs, it turned out that there was no signal at all. Is there another IC that has a problem so that 2 1540D ICs don't work normally?
I don't know what's going on - can anyone help?
Thank you,
Ahmad
the cd84 is a complex machine and not easy to troubleshoot.
there are chances for one or more dry solders and/or a cut fuse on one of the pcbs (there are many in the form of transistors) and/or a transistor, an hs diode.
I don't know if you have the service manual but you will have to proceed methodically and start by checking all the voltages from the service manual.
there are chances for one or more dry solders and/or a cut fuse on one of the pcbs (there are many in the form of transistors) and/or a transistor, an hs diode.
I don't know if you have the service manual but you will have to proceed methodically and start by checking all the voltages from the service manual.
Ahmad,
Do you have an oscilloscope? I would check the digital signals at the input of the DAC chip and at the previous chips. Of course after you found all power supply voltages are OK.
Do you have an oscilloscope? I would check the digital signals at the input of the DAC chip and at the previous chips. Of course after you found all power supply voltages are OK.