FujiFilm CR-IR341 Service Manual page 114

C 1 2
ONTENTS
HV control
HV can artificially control the turn-ON/OFF of the output by use of a software switch of the
Maintenance Utility and a slide switch (S1) located on the SCN08A board.
This information is reported to the CPU, so that when HV is OFF, a dialog indicative of the
HV OFF status is displayed on the monitor.
The HV control signal is routed from the SCN08A to the PMT08 board.
This signal is outputted at an analog level of 0 (= OFF) – 10 V.
The resulting output, multiplied by 100 (i.e., 0 V to -1000 V), is outputted as HV.
Data bus
- 2.5V
Soft ON/OFF
HV Control Block Diagram
009-051-04
05.31.99 FM2460
3 4 5 6
DAC 8-bit
Latch
HV decoder
Hard ON/OFF
CR-IR341 Service Manual
7 8 9 10
0 — - 3V
MD - 51
Multiplied
by 2.5
Multiplied
by -1 LPF
HVON : 2.5 — 10V
HVOFF : 0V
MD - 51
PMT08
FR1H0245.EPS