| Electronics > Repair |
| Help repairing a switching power supply out of a Pioneer DJ Disc Player |
| << < (3/5) > >> |
| jmibk:
Voltage on C11 is around 10V DC, going up and down -> see video. http://audiowerk.at/PioSupp/3/IMG_1976.MOV The Diode D7 seems to be ok, diode test is ok (0,565V), resistance 4,5k (+ at A, - at K) and 200k (falling, + at K, - at A) I also changed back C102 and C103, the voltage is now like on the first pics... |
| joao2004:
Resistance and voltage from pin 2 to pin 3 (Z2) ?? also check R18 and D4 |
| mij59:
Last thing I can think of is a problem with the feedback, diode test PC1, pin 1 and 2 should give a voltage of about 1.1V. Z101 is probably a TL431, check the data sheet. |
| jmibk:
Voltage Z2 Pin 2 to 3: 0,4V R18 = 10kOhm Diode Test PC1 Pin1 <> Pin 2 = 1,05V I'll check Z101 and the Diode later... |
| joao2004:
Remove C7 Diode test PC1 4(+) to 3(-) Z2 probably is faulty! |
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