Fingerprint Attendance Machines Tear Down

The plastic case, brand is called zkteco. fingerprint recognizer on the bottom, a speaker on the back side case.

The backside hooking case

Main PCB includes DRAM, main controller called multi-bio 300 but no information can be found. wifi module called CDtech. speaker and amplifier audio driver is SGM4890.

An TFT LCD display connected via FPC connector.

RTC chip is the top black module. and two grey ribbon cable connect to a USB reader on the left bottom.

More details for the main board

front side keyboard

key board caps

One cable for the data and one cable for the leds.

The LED light guide

Fingerprint sensor see more information on this page.

An heavy metal part to anti interference for the main chip and DRAM.