Mitsubishi Electric HD-6000, Service Manual

Page: 17 / 54

MODEL: HD-6000
Page 17
Purpose:
Measuring
Instrument
Test Point
Measuring
Range
Input Signal
Ext. Trigger
Input Terminal
Symptom:
Purpose:
Measuring
Instrument
Test Point
Measuring
Range
Input Signal
Ext. Trigger
Input Terminal
Symptom:
[Video Circuit]
3. Sub Picture Offset
To match sub picture white to main picture white
Sub picture white differs from white in the main picture.
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Full White Raster
External Input
1. Supply a full white raster signal to an External Input.
2. Select the White raster as the source for both the main and sub pictures.
3. Use the PIP/POP buttion to select the Single PIP mode.
4. Enter the Alignment Mode (MENU-2-4-5-7)
4. Select the AD9883A function (AUDIO button).
5. Select item #12 ROFF and #14 BOFF (VIDEO button).
6. Set the data fore items #12 and #14 so the sub picture white is close to that in
the main picture. (ADJUST buttons).
7. Press “ENTER” to save data.
8. Press “MENU” twice to exit the service mode.
[Video Circuit]
2. Sub-Y Gain
To set the sub picture Y level
Incorrect analog source sub picture brightness level.
Oscilloscope
TPY & TPSY
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Color bars
External Input
1. Supply a Color Bar pattern with 100% white signal to an External Input.
2. Select the Color Bars as the source for both the main and sub pictures.
2. Connect a scope to TPY (Main Luminance) & TPSY (Sub Luminance).
3. Enter the Alignment Mode (MENU-2-4-5-7)
4. Select the SMTX function (AUDIO button).
5. Select adjust item #14 YDRS (VIDEO button).
6. Set the data so the waveform at TPSY equals TPY. (ADJUST buttons).
7. Press “ENTER” to save data.
8. Press “MENU” twice to exit the service mode.
TPSY
TPY
PWB-SIGNAL (Partial)