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 

Sony TA N 902 Esprit Solid State Class A Amplifier Clone

Sony Esprit TA-N902 Power Amplifier:

My design about Sony's clone, power part simulation: 

Sony Cassette Deck ES 3Heads Closed Loop Dual Capstan

Cassette Deck and analog sound passion!!!
A little dream has been realized:  my Sony TC-K777es and his little sister Sony TC-K666es !

Sony TC K777es Sony TC K666es

Sony TC K777es Sony TC K666es

Next Power Amplifier based on Sony Esprit Series Using No Negative Feedback Architecture

I'm traying to make an amplifier following example of Sony TA-N902 Esprit Sere, the last aftre TA-N900 mono and TA-N901 stereo.
Sony's Esprit  amplifier all haven't Negative Feedback, they had a Voltage Amplifier Stage made by discrete components, which has his proprer feedback and a current stage located out the loop, This architecture decrease the TIM distortion. To minimize THD Sony used his own  patent concerning non-switching power devices, the stage also remain a AB class but  results similar to pure class A.

3D of the  Voltage Amplifiere Stage

Some amplifier are been used as example for schematic or as  components donor.

Power supply is from a PLPS from an old TA-F80,electronic components for VAS are coming from a TA-F500, the chassis is given by a broken Behringer A500.
Other components are new and PCB are made by myself.

Current Amplifier 3D

I used a lot of SMD components, all with 1206 dimension

Soon I'll show the complete work

Sony TA-F770ES ES Series MOSFET Amplifier 100W " MOS FET Power Stage" Toshiba 2SK1529 2Sj200 pt.II

Sony TA F770es ES series 
Mosfet amplifier 100W

Sony TA F770es pt.1

Sony TA F80 ; Power Amplifier 120 + 120W, PLPS Power Supply, Restoration Project pt.II

 Amplifier Sony TA-F80 :

Sony TA-F80 

Sony's Knobs after clean

 TA-F80 power board with Heat Pipe and power BJT,  NEC 2SC2681 instead Sony 2SC2571 from factory..

Sony Power Board Before Restoration

Input and EQ Control Boards

Sony Japan RIAA - UNIT 

 Pulse Loked Power Supply PLPS:

TA-F80 Amplifier  Inside

Sony TA-F770ES ES Series MOSFET Amplifier 100W " MOS FET Power Stage" Toshiba 2SK1529 2Sj200

SONY Integrated Stereo Amplifier TA-F770ES
F770ES
Spontaneous Twin Drive
Super Legato Linear
Gibraltar Chassis
MOS FET POWER STAGE

MOS FET Power Stage F770ES

Description....

Toshiba 2SJ200 and Drivers

Inside View

Specifications:

Sony TA-F570ES Amplifier 100W Gibraltar Chassis

My New, Not Working, Sony ES Amplifier

Sony TA-F570ES

ELNA FOR AUDIO CAPACITORS

2SC2921 2SA1215 in Gibraltar Chassis

My Sony ES HI FI system

About Sony:
Integrated Amplifier    TA-F555ES
Cassette Deck          TC-K777ES
CD Player                 CDP-701ES
CD Player                 CDP-501ES
CD Player                 CDP-502ESII

About Philips:
Speakers                  FB-821
CD Player                 CD-650

About TEAC:
Cassette Deck          V9000 Esoteric
Cassette Deck          V5000

About Yamaha:
Cassette Deck          KX-670

About Technics:
Turntable                  SL-1410