2-5. Horizontal Duty Adjustment
2-6. Heater Voltage Adjustment
2-5. Horizontal Duty Adjustment2-6. Heater Voltage Adjustment
Equipment : OscilloscopeEquipment : Digital voltmeter
PreparationsNote
. Iris of the lens :CLOSEDuring adjustment, do not set heater voltage to 700 mV or
. BRIGHT control :Fully counterclockwise 3over.
. CONTRAST control : Fully counterclockwise 3
. PEAKING control : Fully counterclockwise 3Preparations
Adjustment Procedure. BRIGHT control :Mechanical center
. CONTRAST control : Mechanical center
Test point :IC501-7pin/VF-70. PEAKING control : Mechanical center
GND :Shielding case of FBT501/VF-70
Adjustment point :1RV104/DF-58Adjustment Procedure
Specification : ?T = 2.90.1 us
Turn 1RV104 fully counter-Test point :TP22/VF-70
clockwise, and slowly turn itGND :TP23/VF-70
clockwise until the specificationAdjustment point :1RV501/VF-70
is satisfied.Specification :?30 mV dc650
Turn 1RV501 fully clockwise, and
slowly turn it counterclockwise
until the specification is satisfied.
T
(Do not set heater voltage to
700 mV or over.)
n
If T is set to 2.5 us or below, high-voltage protection
circuit may become activated. In this case, power off once
and turn 1RV104/DF-58 fully counterclockwise. After
that power on again to perform the adjustment.
RV401
RV501
*Soldering side
*TP22*TP23
FBT501
IC501
VF-70 - component side -
2-4 (E)HDVF-20A |