Vfd Display Block Circuits; Vfd Diagram & Waveform - Sam4s ER-5200 Service Manual

7 Special Circuit Descriptions

7-4 VFD Display Block Circuits

This uses 10digit Fluorescent Display and uses UCN5812AF (is located on the Front VFD PCB) for the driver. CPU
sends Display data to the driver repeatedly having given time interval in series and then Fluorescent Display is operated.
CLK, DATA, LATCH
STROBE
CPU
+30V,+5V,GND
CLK,
DATA
LATCH&STB
7-6
DRIVER
UCN5812
CLK,
DATA
LATCH&STB
Figure 7-10 VFD Diagram & Waveform
0 1 2 3 4 5 6 7 8 9
Front & Rear VFD PBA
10Digits
SAM4S ER-5200 Series