Sam4s ER-420F - Troubleshooting; Power Problem

7 PCB Layout and Parts List
SAM4S ER-420M/F SERIES 7-7
7-4 Display Layout
7-4 A. ER-420F Front Display (VFD 10Digit)
No Part-No Description / Specification Q’TY Design Location Serviceable Remarks
- 3711-004111 WAFER;BOX-HEADER,1R,8P,2.5mm,ANGLE 1 CN1 Y
- 3711-002002 CONNECTOR-HEADER:-,22P,2R,2mm,STRAIGHT,S 1 CN2 Y
- JK07-00005A DISPLAY VFD-DC10G:FUTABA,10-LT-50GK 1 V1 Y
- JK39-40600A HARNESS-DISPLAY;ER-380,8P,350mm,CORE 1 HARNESS Y
- JK73-10207A RPR-PAD:ER-220N,SPONGE,-,BLK,- 2 T5.0 Y
- 1003-001381 IC-VFD:HV5812P,DIP,28P,540MIL,-,-,ST,PLA 1 U1 Y
- 0402-000208 DIODE-RECTIFIER:EK-04,40V,1.5A,DO-41 1 D2 Y
- 0402-000129 DIODE-RECTIFIER:1N4003,200V,1A,DO-41,TP 1 D1 Y
- JC39-40511A CBF HARNESS:ML-80,JUMPER,AWG22,52mm,SILV 21 J1~J21 Y
- JK41-10005B PCB-DISPLAY(10G):ER-350/F,FR-1,1L,T1.6 1 Y