vsx 1021K 2sb1560 replacement parts

[jasonkiet]

Hi,

I am a noob and have no electronic background beside those high school courses. I don't know how to read the schematic but I know the principle of resistors, transistor and capacitor. I have a Pioneer vsx-1021K which I bought new 8 years ago. Last week I was careless and shorted the center speaker wires, no smoke or anything. The MCACC light is flashing after that. So I read through this forum and watched Youtube videos, I managed locate the shorted transistor 2sb1560 (part# J5032390Y0000-IL) and 2 bad resistors 0R47 (part# N113136647820-IL). After cutting them out, I put the received into the release mode “simultaneously hold Tune down arrow + multi-zone on/off for 5s” and now it is on and working again without center speaker of course. I have the service manual and found the part numbers. I went to pioneer website but they don't have it. The pioneer website referred me to pacparts.com but it doesn't have those parts either. I am stuck. Can you guys help me to find the equivalent parts? I went to digikey.com to search for the bad resistors 0R47, the result is so many when selecting “Through Hole Resistors” type. I need the following parts (you can see the picture equivalent)
1. Resistor N113136647820-IL (these 2 are bad, they don't have out any om when measuring, I need 2 of them)
2. Transistor J5011560Y0000-IL (small one) (I need 1, not sure if I need to replace this one or not because it is doesn't give me the beep)
3. Semi, TR/GE NPN 2SC J502396400010-IL (2sd2390) (I need 1, this one is ok since this forum said vsx 1021K is class B AMP, I better replace these transistors in pair because of the bad one 2sb1560)
4. Transistor J5032390Y0000-IL (2sb1560) #1 (I need 1, this one is bad, it gives me a beep)

Also is there other related components I need to check for? Finally, how do I adjust the idle current when I am done? I know there is a nob I can adjust but I don't know how/where to put the multi-meter on the AMP board to measure?


Please see attachments for pictures and service manual (in zip format cuz it is bigger than 28Megabytes)

[frankusb]

Re: vsx 1021K 2sb1560 replacement parts

I am no expert, but I would try:
https://www.digikey.com/en/products/...3-0R47/2058860
https://www.digikey.com/en/products/...SB1560/3661806
https://www.digikey.com/en/products/...SD2390/3661818

Q433 and Q436 would be next I would check if the above does not resolve the problem.

[frankusb]

Re: vsx 1021K 2sb1560 replacement parts

Oh, idle current is described in 8.4 IDLE CURRENT ADJUSTMENT of the service manual.

[jasonkiet]

Re: vsx 1021K 2sb1560 replacement parts

I am no expert, but I would try:
https://www.digikey.com/en/products/...3-0R47/2058860
https://www.digikey.com/en/products/...SB1560/3661806
https://www.digikey.com/en/products/...SD2390/3661818

Q433 and Q436 would be next I would check if the above does not resolve the problem.

Thanks but the picture of the OR47 resistor in digikey has an extra purple band at the end. Is it still ok?

[jasonkiet]

Re: vsx 1021K 2sb1560 replacement parts

Oh, idle current is described in 8.4 IDLE CURRENT ADJUSTMENT of the service manual.

Where do you contact on the amp board to measure current?

[frankusb]

Re: vsx 1021K 2sb1560 replacement parts

Thanks but the picture of the OR47 resistor in digikey has an extra purple band at the end. Is it still ok?

Yes, see: https://www.digikey.com/en/articles/...rs-color-codes

[frankusb]

Re: vsx 1021K 2sb1560 replacement parts

Where do you contact on the amp board to measure current?

Fig 1 on page 53 shows the location. TP403 pin 1 and 3 for C channel.