DYNACORD S900 Power Amplifier Dismantle and Fix part2

Finally, the new potentiometers are in place. Dismantle and checking the board.
Made In Germany 2009 Dynacord S 900 same like Electro Voice CPS1, CPS2, Electro Voice Q44, Q66, S 1200
00:00 Very important! Before dismantle the board take a look at 05:45 !!!!
00:10 checking and testing the fanes
01:40 about design...
02:40 new potentiometer just came in the post!
03:40 improvisation strike again!
04:18 let's take the board out
05:00 cleaning the mess...
05:17 replacing the potentiometers
05:45 very important!
06:44 motherboard back in case
07:08 resolder the potentiometers to fit the mechanical position...
09:30 mono/stereo switch got a MOD...temporary
10:12 ready for a first test!
14:33 just found the rebel switch parts! let put it together
16:34 fans back in place
17:04 front panel is back
17:36 The Climax of the evening! Like the Opera!
18:39 take a look at this page...
19:56 outro
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Tools:
TS100 soldering Pen
Kraft & Dele KD852 Hot Air Station
Parkside PLSD 48 B2 Soldering Station
Fluke 187 True RMS DMM multimeter,
Der EE DE5000 LCR meter
ACM03 AC/DC clamp meter, multimeter
M890G,ADM02,Venlab VM200M multimeters
Go EMF 390 spectrum analizer
Lutron SL-4001 Sound Level Meter
Color Munki Display X-rite colorimeter
YR1035+ Internal Resistance and Low Z meter
NanoVNA S-A-A V2
ZEEWEII 154Pro mini oscilloscope & signal generator
Generic USB 1000X, 5.5'' LCD microscope
DIY 30V 4A Linear Power Supply
DIY 2x LM317 differential +-24V power supply
Charsoon Antimatter 250W 10A li-ion battery charger
USB Digital tester J7-C

Video & Audio:
Sony A6500
Fujifilm X-S10
Panasonic GF2
DJI OSMO Pocket camera
Focusrite Saffire Pro 40 Firewire Sound Card
Behringer Q802USB mixer & Sound Card
Edirol R-09 digital recorder
POSS PSMIC02 Bluetooth Wireless lavaliere
SX9 Wireless Microphones
Shure Sm58 vocal microphone
SE V7X Dynamic vocal microphone
Yamaha HS5 studio monitors
MiniDSP Flex Audio Processor
Yamaha StagePass MK1 amplifier
C-Audio 3000 Power amplifier
Dynacord S900 Power Amplifier
Behringer PMP 3000 Powermixer
Mackie cabinets
Sony MDR 750B headphones
Ketron Midjay Midi Sound Generator
Ketrom Midj Pro Multimedia Player
Roland JW50 Workstation
Roland G600-SC88 Sound Canvas
TC-Helicon VoiceLive Play GTX
Squier Stratocaster electric guitar
Traveller Escape MK II electro-acoustic
Yamaha APX9 electro-acoustic
Exquise Midi controller
Edirol PCR-M80 MIDI keyboard
Edirol PCR M-1 Midi controller


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Radu Georgescu @radu3g, Vlad from Amphia Records @Amphia, Chuck Kirchner https://odysee.com/@JollyEngineer:2