JVC VF-P116E, Руководство по обслуживанию

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4
Measuring Measuring point (
*
)
No. Item instruments & Adjustment parts (
-
) Adjustment procedure
Input signals Adjustment level (
+
)
1 12V supply
voltage check • Digital voltmeter 1) Check to see if the specified voltage is meas-
ured at the measuring point.
*
Between pin 5 of CN1 and
GND [MAIN]
+
+12V ± 0.5V
2.3 CHECK OF SUPPLY VOLTAGE
1 H. HOLD
adjustment • Frequency
counter
1) Adjust VR3 to obtain the specified frequency
at the measuring point.
*
Between collector of Q10
[MAIN] and TP3(GND)[VR]
-
H. HOLD(VR3)[MAIN]
+
14.7 ± 0.3kHz
2.4 ADJUSTMENT OF H.HOLD
1 V.HOLD
adjustment • Oscilloscope
(V-rate,10:1)
1) Adjust VR5 to obtain the specified level at the
measuring point.
*
TP2 and TP3 (GND)[VR]
-
V. HOLD(VR5)[MAIN]
+
17.5 ± 0.5ms(U.Ver)
+
21 ± 0.5ms(E.Ver)
2.5 ADJUSTMENT OF V.HOLD
1 Video level
adjustment • Gray scale chart
• Oscilloscope
(H-rate,10:1)
1) Shoot the gray(scale) chart by the camera.
2) Observing the waveform on oscilloscope, ad-
just VR101 to obtain the specified level at the
measuring point.
*
TP1[MAIN] and TP3
(GND)[VR]
-
VIDEO LEVEL(VR101)
[MAIN]
+
+10 ± 0.5V DC
2.6 ADJUSTMENT OF VIDEO LEVEL
17.5
±
0.5ms(U.Ver)
21
±
0.5ms(E.Ver)
+10
±
0.5V DC
0V DC