Repair of KUSTOM KBA 100 Bass Guitar Amplifier TDA7293 100W

Kustom KBA 100 fix.
Transformer and TDA7293 IC Audio Power Amplifier  Replacement.

Sony Esprit TA-E901 Preamplifier Audio Module Replacement, Substitute, Spare revision 1

My own project about Sony Audio Module 
Amplifier board for Sony ESPRIT repair.
TA-E901 Flat Amp Preamplifier 

Ampeg SVT3 Pro Tube & Mosfet Electric Bass Amplifier - Bias Adj and Repair

Sony PS-X65 DD Turntable Repaired Restored

Sony PS-X65, trouble of drop point solved.
IC103 defective, once replaced the turntable plays well!!

Signals on pin 1 and 4 weren't correct, Luckily t was only the 4069 IC...

Faulty Component, datacode 79 48

My replacement..NOS MC14069UB datacode 80 36