Yamaha RX-797 amplifier repair part 2
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- čas přidán 16. 09. 2023
- We came, we saw, we tried. Let me know if I was right, or completely dropped the ball here :)
CAUTION do not work on mains operated device unless you understand the risks and how to do so safely.
Tools I use -
Soldering
Quick 861DW hot air station
Duratech TS-1640 solder iron
Multimeter
RMM760D - can be found under many name badges
Microscope
Luzky Zoom 3.5 - 90x simul-focus single boom stand trinocular stereo microscope
Camera - Lucky Zoom HD 14MP
Oscilloscopes
Siglent SDS 1102CML 100MHz 2CH
Philips PM 3305 35MHz 2CH
Function generastor
FY6900 (many brand names)
Thermial imaging camera
FLIR ONE PRO on android
Bench supply
Powertech MP-3086 0-30V 3A
TL866II PLUS universal EEPROM programmer - Věda a technologie
Nice fix ad usual. Bravo! Regards from Italy.
So many of these broken, perhaps someone can donate you a display. Try lowering the resistance just to see. Check the power available to display, not just voltage, remove display again and find a suitable load to replace it with, perhaps a bad cap or something else is robbing available power but then i expect the voltage would drop lower. Must be the display. Damn.
i have to admit that positive and negative voltages connected confuse my brain lol.
I have the same problem with radios that have a positive earth... what!! err lol.
i do get confused with silly stuff.
Im crap at maths so confusion makes me want to run away lol.
Later on i can make sense finally lol.
Me too!
The cd direct Button shuts down the display for a "pure" signal
🤣
Help, please. I have bought an older Velodyne DD12 and it does not respond to any button I press on the remote control. The remote apparently works because the red led lights up and the infrared sensor blinks when checked with a phone camera. The subwoofer works when connected to a receiver but I can't change any equalization settings or else. What could be the problem and how can I solve it?
dsp chip?
Yes, the repair shop has found that the problem is on the dsp board. Either they fix the chip or order another board from Velodyne. and that board is EXPENSIVE AF@@izzzzzz6
Thanks for the video.....dont buy a yamaha haha