MITSUBISHI ELECTRIC WS-48315 User Manual

Page 33

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Page 33

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:

MODELS: WS-48315 / WS-55315 / WS-65315

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Monoscope

Video Input

[Video Circuit]

7. Black Level

To set the black level of the picture.

Excess or insufficient brightness.

1. Supply a Monoscope signal to a Video Input.
2. Activate the Adjust Mode, Video Chroma Function.
3. Adjust Item “2 SBRT” so the 0% and 10% black levels on the gradation scale

are the same.

4. Press ENTER to save data.
7. Exit the Service Mode.

NOTE: Item 2 SBRT should be no more than “21”.

40% 30% 20% 10%

50% 0%

0%

0%

60% 70% 80% 90%

GRADATION SCALE

DC ma meter

DT connector pins 7 & 8

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Grayscale

RF Input

To set overall beam current to its’ optimum level.

Excess or insufficient contrast.

Note: Activate the Expand mode (full screen).

1. Supply a Grayscale signal to a RF Input.
2. Activate the Adjust Mode, Video Chroma Function.
3. Select Item “1 SCT”, signal level automatically reduces.
4. Connect a 3ma DC meter between DT connector pins 7 and 8. Positive lead to

pin 7.

5. Adjust Item “1 SCT” for the current given in the table below.
6. Remove the meter.
7. Press “ENTER” to save data.
8. Exit the Service Mode.

[Video Circuit]

8. Sub Contrast

CIRCUIT ADJUST MODE

Activate …….. MENU-0-3-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)

CIRCUIT ADJUST MODE

Activate …….. MENU-0-3-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjust Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)

Sub Contrast Current Alignment

WS-48315 / WS-55315

WS-65315

520 ±10ua

550 ±10ua

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