KE-2050/KE-2060, KE-2050R/2055R/KE-2060R Maintenance Manual
14-27
14-4-10. Adjusting the Light Ctrl Board Assembly (40001904) and Light Ctrl Board (50)
Assembly (40001918)
[Functions]
These boards control the brightness of each LED lamp.
[Jumper switch settings]
Jumper switches are provided on the Light Ctrl board assembly to be used in the control unit.
Set these jumper switches correctly while referring to the table below.
W1 (14P)
→
Wholly open
W2 (4P)
→
Wholly open
W3 (4P)
→
Open
W4 (2P)
→
Wholly open
W5 (2P)
→
Short-circuit
[Adjustment items after replacement]
• Adjusting the reference voltage for the LightCtrl board
<Specification>
• +8VREF = 8.000 V ± 0.005 V
<Adjusting Method>
c Before attempting to start adjusting the reference voltage, ensure that the DC power
source output voltage has been properly adjusted.
d Using a digital voltmeter, measure the voltage at the check pin TP4(+8VREF). Use TP1
(AGND) for the ground pin.
e Turn the variable resistor VR1 as necessary to make the measurements taken fall within
the specifications.
ＴＰ１ ＴＰ２ ＴＰ３ ＴＰ４ CN1
○○○○ OCCLIGHT
VR1 AGND GND
24VRE
+8VREF
Figure 14-4-10-1 End View of the Light Control Board
Rev. 2.00
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