| Electronics > Repair |
| Help repairing a switching power supply out of a Pioneer DJ Disc Player |
| << < (4/5) > >> |
| 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:
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| 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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