TA2123AF Chipset
![Sony WM-EX610 PCB](WM-EX610%20Chipset/WM-EX610-pcb.gif)
The Sony WM-EX610 Printed Circuit Board (PCB) is double sided with surface-mount devices (SMD) on both sides. This is the only way to pack so much electronic circuitry into a small space, hence this impressive build shows why the Japanese have always been the leaders in electronic engineering design.
OKI 512-127-1146
![OKI 512-127-1146](WM-EX610%20Chipset/OKI-512-127-1146.jpg)
The main microcontroller chip, or the brain, for this Walkman is the OKI 512-127-1146 made by OKI Semiconductor. This CMOS 4-bit microcontroller operates on just 0.9 V power, and has a built-in level detector, melody circuit, and comparator. The reason why it can do so much and yet require such little power is that it follows the RISC architecture.
The melody circuit provides those familiar beep sounds through the headphones when operating the player. The microcontroller chip also communicates with the external remote controller.
Toshiba TA2123AF
![Toshiba TA2123AF](WM-EX610%20Chipset/toshiba-ta2123af.jpg)
The stereo audio amplifier chip is the Toshiba TA2123AF, which operates on voltages less than 1.5 V. Toshiba are the leaders of this technology and they were developing audio amplifier chips even in the early 80s. This chip has auto-switching preamplifiers for auto-reverse, stereo power amplifiers with bass and treble boost functions, and Automatic Music Sensor (AMS) function.
This Article Continues...
![WM-EX610](WM-EX610.gif)
Sony WM-EX610
Sony WM-EX610 Inside
Sony WM-EX610 Tape Deck
Sony WM-EX610 Audio Head
TA2123AF Chipset
Sony WM-EX610 Fault
Sony WM-EX610 Motor
Sony WM-EX610 Drive Belt
Sony ATS & Tape Sensor
Sony WM-EX610 Servicing
NC-6WM Battery & BC-7SP2 Adapter
RM-WME23
Sony WM-EX610 Back Case