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Viewpoint of WID (adjustment of horizontal amplitude)
Left side
Left flag end
Adjust the WID data so that the number of register flags on the left and
right of Phillips pattern will come to 7 in total when added.
Direction of adjustment: Facing to the east
Adjusting method of IF board
Item:
AFT
Name of adjustment: Adjustment of AFT/f0
Setting:
Adjusting tester
38.0 MHz (CW), 96 dB (uV), 75 Ω at the terminal
Input signal:
Measuring point:
TP13 (IF board, #7: AFT line)
Adjustment prcodures:
Send the input signal to #2 (IF input line)
Vary the coil of LI54.
Search the point where the voltage of #7 varies suddenly between 0 V and 5 V.
Adjust the voltage of #7 so as to be 2.5 V ± 0.5 V.
Item:
RF AGC
Name of adjustment: Adjustment of RFAGC/DELAY
Setting:
Adjusting tester
38.0 MHz (CW), 96 dB, 75 Ω at the terminal
Input signal:
Measuring point:
TP15 (IF board, #6: RFAGC line)
Adjustment prcodures:
Send the input signal to #2 (IF input line)
Vary the RI51 of volume.
Adjust the voltage of #6 so as to be 3.0 V ± 0.3 V.
Necessary equipment and instruments
Signal generator which can generate 96 dB (uV) at 38.0 MHz, 75 Ω of the terminal
Voltmeter which measures voltage
Right side
– 17 –
Right flag end
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