I need to add a digital out to above player. The same PCB is apparently used for the 400 and 500 models which have a digital out.
I have located the datasheet of the decoder
http://www.datasheetcatalog.com/datasheets_pdf/M/N/6/6/MN6626.shtml
but it is more than basic.
Does anybody know if the dig out is disabled / enabled by software as in most Philips chipsets?
Why would the digital output interface on the chip have an input named MEMP?
Thanks
I have located the datasheet of the decoder
http://www.datasheetcatalog.com/datasheets_pdf/M/N/6/6/MN6626.shtml
but it is more than basic.
Does anybody know if the dig out is disabled / enabled by software as in most Philips chipsets?
Why would the digital output interface on the chip have an input named MEMP?
Thanks
The datasheet does not seem to show anything that I could identify as an enable/disable pin. I would bet that the "TX" pin is sitting there outputting SPDIF signal waiting to be used. Try connecting it to an output jack, with a 75ohm(50-100ohm is near enough) in between & the jack grounded to the main board & see if connecting it to a DAC unit produces music. Probably will.
I checked with a scope, without even taking out the PCB, just by sticking the probe into a hole for a non-existant resistor that had the label "SL-PG 400/500 only" printed nearby, and yes, the output seems to be happily chattering to itself.
I then inserted a resistor into that hole and by heating from above, got it soldered into that very hole.
Now, the player refuses to read the disks
I doubt I killed the decoder though electrostatic discharge, because I am always careful to toucht the chassis first, so I will have to check whether a solder blob formed on the lower side of the PCB.
I then inserted a resistor into that hole and by heating from above, got it soldered into that very hole.
Now, the player refuses to read the disks
I doubt I killed the decoder though electrostatic discharge, because I am always careful to toucht the chassis first, so I will have to check whether a solder blob formed on the lower side of the PCB.
Took out the PCB - no solder blob, but also no supply decoupling near the decoder to speak of. Reconnected, still not playing. Considered cleaning the bearing of the CDM4 swing arm but decided to play with the focus adjust first. Giving the pot a 2° random twist while trying to find the right hex bit did the job!
It sounds like you are saying you got it working again, but I am not quite sure. In any case, very weird behaviour which suggests to me that you should check for cracked/suspicious looking solder connections on the entire PCB. Look particularly around heat-generating parts, such as voltage regulators and large resistors, and on connector pins.
Did you get a square wave signal? How did it look/sound? Curious, as i have a SL-PG100 in the garage with the same chip. Before i plug-in the soldering pencil, just wanted to know your general results.
