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7-1.
POWER SUPPLY SECTION ADJUSTMENT
(MC- 67 BOARD)
Adjustment and confirmation are made with the power sup-
ply ON.
Signal
Arbitrary
+
Measuring
Digital voltmeter
instrument
Ever 5V check
Pin @ of IC501
Measurement
point
Specified
9.0+0.2Vde
value
Digital 5V adjustment
TP501 (Collector of Q506)
Measurement
point
Adjusting
element
RV501
Specified
5.0+0.2Vde
value
Digital—5V adjustment
Measurement | TP502 (Pin ® of CN201)
point
Adjusting
element
RV502
Specified
—5.0+0.2Vdc
value
[Checking method]
1)
Confirm that the voltage of the pin @ of IC501 is
5.0+0.2 V dc.
[Adjusting method]
2)
Adjust with RV502 so that the voltage at the TP502 is
~5. 0£0.2 V de.
7-2.
VIDEO SECTION ADJUSTMENT
7-2-1,
4fsc Adjustment (VI-60 Board)
Signal
None
TP 3 (Collector of Q 26)
Measurement
point
Measuring
Frequency counter
instrument
Adjusting
CV 3
element
4433619+ 10Hz
Specified
value
[Adjusting method]
1)
Adjust to 4433619+10Hz with CV 3.
—103—
7-2-2.
CLK Adjustment (VI-60 Board)
None
—}
Signal
Measurement | Pin® of IC 207
point
Measuring
Oscilloscope
instrument
Adjusting
CV 1
element
Specified
2.5+0.3Vdc
value
(Adjusting method]
1)
Adjust to 2.5+ 0.3 Vde with CV1.
7-2-3.
PLL Adjustment (VI-60 Board)
Signal
Color bar
Measurement | TP7 (Pin @ of IC 209)
point
Measuring
Oscilloscope
instrument
Adjusting
CV 2
element
Specified
2.5+0.2Vdce
value
[Adjusting method]
1)
Adjust to 2.5+0.2Vde with CV2.
7-2-4.
SYNC Generator Phase Adjustment
(VI-60 Board)
Signal
Color bar
CH 1: CNJ3 VIDEO IN
CH 2: TP5
(Pin@® of IC 207)
Measurement
point
Measuring
Oscilloscope
instrument
Adjusting
RV 8
element
Specified
t=0+50nsec.
{Adjusting method]
1)
Adjust to 0+50 nsec. with RV8.
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