Electronics > Repair
Help repairing a switching power supply out of a Pioneer DJ Disc Player
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jmibk:
Resistance Z2: Pins 2 to 3 = 340k / 500k depending on leads polarity.

Diode Test PC1 (4 and 3) = "OL" both directions, desistance also "OL"... maybe the damaged part....
mij59:

--- Quote from: jmibk on April 16, 2016, 03:34:29 pm ---Resistance Z2: Pins 2 to 3 = 340k / 500k depending on leads polarity.

Diode Test PC1 (4 and 3) = "OL" both directions, desistance also "OL"... maybe the damaged part....

--- End quote ---

The transistor ( pin 3,4) will not turn on unless there is a sufficient led current ( pin 1,2) flowing.
funkyant:
jmibk:
Optocoupler PC1 works very well, tested it on a breadboard with help of two resistors and one red led...

Diode D4 also OK, tested with external power supply... 23.8V
joao2004:
Faulty Z2... any way measure the resistance between pin 1 and 2 of transformer

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