Test Equipment, Power Supply And Charts For Adjustment; Connections For Adjustment - Hitachi DZ-MV350A Service Manual

Adjustment > Setups for Adjustment

6-2-3 Test Equipment, Power Supply and Charts for Adjustment

1) Color bar chart
2) 3100 K light box (maintenance is necessary)
3) Backfocus chart
4) Color monitor (color TV with AV input jacks)
5) Oscilloscope
6) Vectorscope
7) Digital voltmeter
8) Frequency counter
9) DC power supply for DSP-R jig (5 V/1 A)
Information:
It is recommended that you use a vectorscope when
performing the chroma gain adjustment.
You can use an oscilloscope instead: Note, however, that
the adjustment accuracy will be lower.

6-2-4 Connections for Adjustment

Connect the DVD video camera/recorder, jigs and test equipment as shown in the Fig. 6-2-2, and
point the DVD video camera/recorder at the specified subjects (light box/chart) for each adjustment
item.
Prohibition:
Assemble the DVD video camera/recorder completely, and perform adjustment with only the
adjustment cover removed (see Fig. 6-2-2).
Do not attempt to perform any adjustment with the DVD video camera/recorder disassembled:
Doing so is very dangerous because the DVD video camera/recorder incorporates high-voltage
circuits and a laser emitter block.
Information:
1) Refer to "(1) Adjustment cover" in "5-3 Disassembly" for how to remove the adjustment cover.
2) Set the light box/chart 30-50 cm away from DVD video camera/recorder, and eliminate any
effects from surrounding light, except where such designation is given.
3) Set the lens surface of DVD video camera/recorder in parallel with the surface of light box/chart
as far as possible, and adjust the focus.
4) Use a small tripod to fix the DVD video camera/recorder, making certain it does not move during
adjustment.
5) Use light box whose color temperature is controlled with no flickering, for adjustment. Using an
inappropriate light box will interference with adjustment.
6) Be sure to connect the video output of DVD video camera/recorder to the video input jack of color
monitor, which is usually terminated by 75 ohm: If the video output is not terminated by 75
ohm, the video output value cannot be measured correctly.
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Color Bar Chart
Backfocus Chart