Thanks RJ. I'll source those and finish the job when they arrive. I really appreciate your help.
Peter
pbinet
pbinet
Last Activity: 11-30-2024, 08:19 PM
Joined: 11-28-2024
Location: Portsmouth, New Hampshire
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Yes the letter Z (photo attached). I did temporarily put in zero ohm resistors just to check and now have all working voltages.Leave a comment:
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Apologies as I noticed I uploaded the full manual instead of just the power block schematic. I have now attached the schematic and a photo of the component P312. I have already removed P311 from the board. Two issues with these components in the circuit are P311 blocked all voltage and P312 drops 1.5 volts. The block diagram elsewhere in the manual shows these as connectors. I don't know if there is something special about these components or if I could just replace them with zero ohm resistors?...Leave a comment:
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R J Yes I should have posted the model number it is Sony DVD player model NC875V. I now have the service manual with schematic from ElectroTanya. The low voltages are on pin 1 reads 5.45V should be 8V, pin 5 reads 3.5V should be 5V, pin 5 reads 3.0V should be 3.3V, and pin 6 reads 3.5V should read 5V. Two components on the board I don't recognise are green smd capacitor looking components which the schematic marks as P311 and P312. One of them P311 doesn't read and no voltage is flowing from it into the two diodes D315 and D317 in series....
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Thanks to all! My first time posting in this forum and I am well impressed with all the responses. Thank you all. I have followed RJ's advice and the high voltage supply is working. There are ten low voltage supplies four of which read differently than posted on the board so I will now work on tracing/replacing the components in those lines.
Regards,
PeterLeave a comment:
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Thanks RJ. Both caps read OK with reasonable ESR but I'll change them as you suggest.
PeterLeave a comment:
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Thanks RJ. It is a Sony DVD and that is the circuit. Can I use a standard 15V zener or do I have to source the MAZ4150?
PeterLeave a comment:
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Unfamiliar Zener Diode
I am a hobbyist electronics repairer and am working on a number of projects including a DVD player consumer SMPS 110V and I'm stuck with one component I can't identify that reads short. On the board it is identified as a zener diode and it connects in reverse between the control pin of the chip MIP2E4D and the secondary winding. The component length is 2.3mm. I have attached a photo and would appreciate any help
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