2-3-5. Adjustment after Assembling (PDP. Connect the GND terminal of DVM to the R8Os right
Module Adjustment)leg of the Y board and set the Plus terminal to the
left leg of R8 to check the _Vy voltage (_80 ?1 V)
and when there is abnormality in voltage turn the
1. Using Tools
(1) Digital oscilloscope : More than 200 MHzvariable resistor (VR6) of DC/DC Pack (_Vy) on Y
board to adjust.
(2) DVM (Digital Multimeter) : Fluke 87 or similar one. Connect the GND terminal of DVM to the R89Os
(3) Signal generator : VG-825 or similar oneright leg of the Y board and set the Plus terminal to
(4) DC power supplythe left leg of R89 to check the Vsetup voltage (240
. DC power supply for Vs (1) : Should be changeable?1 V) and when there is abnormality in voltage turn
more than 0-200 V/ more than 10 Athe variable resistor (VR4) of DC/DC Pack (Vsetup)
. DC power supply for Va (1) : Should be changeableon Y board to adjust.
(3) Measuring the Vs voltage Margin and deciding the
more than 0-100 V/ more than 5 Avoltage
. DC power supply for 5 V (1) : Should be changeable
more than 0-10 V/ more than 10 A. Convert the signal of signal generator to the 100%
Full Red signal.
. DC-DC Converter tool (1) : The tool which has. Turn the voltage adjusting knob of Vs DC power
voltage equivalent output of PDP42V5#### Modulesupply to the voltage-down direction and make the
after taking the Vs, Va, 5 V voltagecell of screen turned off.
. Voltage stability of power supply : Within ?1% for. Turn the voltage adjusting knob of Vs DC power
supply to the voltage-up direction until the cell of
Vs/Va, within ?3% for 5 V
screen turned on. The first voltage, which make the
cell of full screen turned on, is named as Vsmin1
2. Connection diagram of measuring instrumentand record it.
and setting up the initial voltage. Turn the voltage adjusting knob of Vs DC power
(1) Connection diagram of measuring instrumentsupply to the voltage-up direction slowly until the
Refer to figure 1. (Connection diagram of measuringcell of screen turned off or over electric discharge.
instrument that adjusting the voltage wave form)The first voltage, which makes the cell of screen
(2) Setting up the initial voltageturned off or over electric discharge, is named as
Initially setting up voltage : Vcc : 5 V, Va : 65 V, Vs :Vsmax1 and records it. (Only, Vs voltage variable
passes over the maximum 195 V)
190 V. Convert the signal of signal generator to the 100%
But, initially setting up voltage can be changed by the
Full Green signal.
set up range according to the ModuleOs characteristic.. Repeat the adjustment (2) item and name each
voltage as Vsmin2/Vsmax2 and record them.
3. How to Adjust. Convert the signal of signal generator to 100% Full
(1) Adjusting initial voltage wave formBlue signal.
Check the voltage wave form like the mentioned way. Repeat the adjustment (2) item and name each
voltage as Vsmin3/Vsmax3 and record them.
on the item O3. How to Adjust� of Section 2-3-4 and
readjust the wave form when it is wrong.. Convert the signal of signal generator to 100% Full
White signal.
(2) Checking the DC/DC pack voltage. Repeat the adjustment (2) item and name each
. Convert the signal of signal generator to the 100%voltage as Vsmin4/Vsmax4 and record them.
Full White signal. Convert the signal of signal generator to 100% Full
. Connect the GND terminal of DVM to the GND of YBlack signal.
board and set the Plus terminal to the right up leg of R9. Repeat the adjustment (2) item and name each
to check the _Ve voltage (_35 ?1 V). And when therevoltage as Vsmin5/Vsmax5 and record them.
is abnormality in voltage turn the variable resistor. At this time decided Vs voltage (Vsmin1-Vsmin5)
adds 6 V to Max value and set up the voltage within
(VR7) of DC/DC Pack (_Ve) on Y board to adjust.the set-up range (180 V < Vs d 195 V) in consider-
. Connect the GND terminal of DVM to the R60Os
ation of other features.
right leg of the Y board and set the Plus terminal to. Turn the voltage adjusting knob of Vs DC power
the left leg of R60 to check the Vscw voltage (115supply make deciding the Vs voltage.
?1 V) and when there is abnormality in voltage turn. Adjust Vset down wave form using setting up Vs
the variable resistor (VR5) of DC/DC Pack (Vscw)voltage like mentioned on the item O3. How to
on Y board to adjust.Adjust� of Section 2-3-4 .
PFM-42V1/42V1A/42V1E/42V1P2-5 |
ACEC
