LonJohn Posted April 20, 2011 Report Share Posted April 20, 2011 Hello! I want to ask few questions about optical pick up replacement on MZ-N10 unit. So i found where to buy new optical pick up assy,question is,how difficult is make all adjustments to fit right? Is there adress (or something like that) where to type new opt. pick up LD current code,or it is not necessary? I bought used MZ-N10 walkman and found their lense are scratched,or maybe dust is under that lense and that makes an optical illusion,when i look at lense with magnifying glass? In service mode error code is 138 NG,which is RF gain adjustment? And sorry for bad english! Quote Link to comment Share on other sites More sharing options...
jim.hoggarth Posted April 20, 2011 Report Share Posted April 20, 2011 Hello! I want to ask few questions about optical pick up replacement on MZ-N10 unit. So i found where to buy new optical pick up assy,question is,how difficult is make all adjustments to fit right? Is there adress (or something like that) where to type new opt. pick up LD current code,or it is not necessary? I bought used MZ-N10 walkman and found their lense are scratched,or maybe dust is under that lense and that makes an optical illusion,when i look at lense with magnifying glass? In service mode error code is 138 NG,which is RF gain adjustment? And sorry for bad english! 138 NG on a recordable (MO) disc is often caused by the overwrite head being open circuit, or damaged or misaligned. It can also be caused by a faulty head coil driver circuit on the main board. Does it come up 138 NG immediately, or does the machine 'hang' on the 138 and only go 'NG' when the stop button is pressed? The operational symptom of this error is blanking discs when recording, ie all disc data is erased when the TOC is updated. 138 NG can, very occasionally, be caused by the optical pickup but in my experience 138NG means overwrite head in nearly all cases. Has someone been in the machine? Desoldering and resoldering of the OWH terminations on the main board, especially with a cheap over-hot soldering iron, can destroy the solder pads on the write head flexible cable. Jim Quote Link to comment Share on other sites More sharing options...
LonJohn Posted May 15, 2011 Author Report Share Posted May 15, 2011 Thanks,jim for answer! Looks like OWH is bent,because when i remove upper panel OWH is looking outward vs optical unit. Maybe someone got a picture of this machine without upper panel,so i can figure out how it should be? Quote Link to comment Share on other sites More sharing options...
sfbp Posted May 15, 2011 Report Share Posted May 15, 2011 Usually the OWH gets bent when the mechanism that brings it down for recording gets defeated (and locked in the wrong place) for some reason. This can easily happen when you remove power at the wrong moment. The best way i know to reset that (if it has been forced open, all bets are off) is to apply power to the unit, and try opening the door spring. You SHOULD hear a characteristic "zinging" noise as the unit resets. No idea if this helps. But I do know that reassembling it with the write up-down mechanism in the wrong place (and door locked) spells disaster. Quote Link to comment Share on other sites More sharing options...
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