I am trying to determine why these two resistors are the colors that they are. This is a Pioneer amp. The ones I am concerned about are the RED & GREEN colored resistors. I need to replace them and want to be sure to use the properly rated component.
Pioneer VSX-40 ,Trying to ID these resistors
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by TinkerTronHey everyone,
I'm currently working on a mid-70s Sharp Electronic Digital Clock Radio, Model FY-70CH. I found the service manual online, printed it out, and have been studying it for a while. My main reasons for tackling this are: (1) I want to learn electronics and figured I'd start with something I had on hand, and (2) I want to fix its issues. Right now, the radio sounds awful, has about 5V DC at the speaker terminals, and the alarm time setting doesn't work. But I'm not asking how to fix these problems.
Instead, here's what's been bugging me so far:
The schematic...3 Photos-
Channel: Troubleshooting Audio Equipment
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by jason123Hi folks,
New audio equipment repair and I could use some help.
Picked up VSX-523-K Surround sound amplifer.
Upon power up for the first time (been sitting for a while) loud popping noise and smoke..
Disconnected, opened up and found many popped caps on the amplifier board.
Replaced all, replaced A992 BJT, and pre-amp transistor and power transistor. I found 0.47 Ohm resistors that are blown or have gone High impedance and I'd like to replace.
On the service manual, it shows these as 0R47(2) (assuming this is a 0.47 Ohm, 2W?)...-
Channel: Troubleshooting Audio Equipment
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by brightest_zHi All - I'm in the midst or reprogramming the bios on my gen1 Surface Laptop Studio and I accidentally blew away 2 resistors nearby the bios. I don't have another board to measure values of the missing resistors and schematics aren't available, bbut the bios is a 6x5mm Winbond WSON8, W25R256JWPQ model. The traces are conductive to Pins 3 and 7 (IO2 & IO3 respectively) so I have reason to believe they are 10k pull up resistors since IO2&3 pins are used for Quad SPI instructions.
Does anyone with more knowledge, and experience than I, know if this is the case?
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Pioneer's passive component naming convention is clear to me. For example, CSZA R22M 35 is tantalum, radial leads, 0.22uF, 20%, 35V.
BUT there are two capacitors on the board which have actual Pioneer part numbers: PCL-042. I can tell they are 0.1uF, 16V but don't...-
Channel: Troubleshooting Audio Equipment
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by jinu_jHi Folks
This has to do with a LED light driver rated for Output - DC36-65V 300mA. This is used to drive a 15W LED panel light.
Now this does not work so opened up and found 2 resistors burnt to crisp. Sensing a learning moment, i looked around the circuit to figure out that it is built around the OB2538 chip. The circuit to a large extent follows the sample application circuit mentioned in the data sheet. I have traced the actual circuit and the same is also attached for reference.
But i have some queries on this circuit
1. The resistors that burnt to crisp... - Loading...
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