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* Place a photo diode on the middle of the display plate.
EV-2500
set
Photo
diode
AV-C1
Audio/Video jack
Input
Input
Connection Point
Vcom Adjustment
Photo sensor amp.
ON
H
M
OFF
L
Input
Output
Adjust
Signal
Connection
Photo sensor
amp.
VR303
Bandpass filter
Oscilloscope
Free-Running Frequency Adjustment
EV-2500
set
Output
TP6
Frequency
VR740
counter
— 11 —
Oscilloscope
Bandpass
filter
Output
Point
Adjust to obtain the minimum
ripple.
Frequency
counter
Adjust to obtain a reading of
TP6
15.625 ± 0.1 kHz.
Result
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