MITSUBISHI ELECTRIC WS-48513 - Manual (Page 42)

Page 42
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-48513 / WS-48613 / WS-55513 / WS-55613 / WS-55813 / WS-65513 / WS-65613 / WS-65713 /
WS-65813 / WS-73513 / WS-73713
DT connector pins 3 & 6
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Video Signal
Monoscope
Video Input
To set the CRT Anode voltage.
Dark Picture
Note: This adjustment must be rechecked following Adjustment 9 CRT Cutoff.
1. Supply a video monoscope signal.
2. Sent Contrast to maximum, and Brightness to mid position.
3. Connect a DC volt meter between pins 3 and 6 of the DT connector.
(Positive lead to pin 3)
4. Activate the Conv-Misc Mode.
5. Select Item “1 HVOL” (screen goes black).
6. Adjust Item “1 HVOL” for 15.4V ±0.2V on the meter.
7. Save data and exit the Conv-Misc mode.
8. Confirm that the voltage does not change more than 0.15V.
Note: This adjustment must be performed if E2RESET or Convergence E2RESET
are activated.
[HV Circuit]
1. HV Regulation
Oscilloscope
JA connector pins 26 &35
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Color Bars
Video Input
[Video Circuit]
2. Main/Sub Y Level
To set picture luminance
Excess or insufficient brightness.
1. Supply a color bar signal to a Video Input (not an RF input).
2. Select the color bar signal for both the main and sub pictures.
3. Connect the oscilloscope to connector JA pin 26.
4. Activate the Adjustment Mode
5. Select Item “22 SCNT” in the MAIN MTRX function.
6. Adjust the data for 0.71 Vp-p max. - 0.66 Vp-p min. at EA pin 15.
(If it cannot be adjusted within this range, set to the lower value)
7. Move the oscilloscope to JA pin 35.
8. Select Item “22 SCNT” in the SUB MTRX function.
9. Adjust the data to equal the MAIN-Y Gain (+0.0V -0.05V).
CIRCUIT ADJUST MODE
Activate …….. MENU-0-3-5-7
Function …...………..AUDIO
Item No. ……….…….VIDEO
Adjus t Data ….…….ADJUST
Save Data …. ………ENTER
Exit …………..MENU (twice)
CONVERGENCE MODE
Activate ……..MENU-0-3-5-9
Misc. ……………….……"6"
Coarse………………..…."5"
Fine ……………………..."4"
Color (R,G or B)……AUDIO
Item No………….…..VIDEO
Adjust/Move……….ADJUST
Cursor Toggle….…..ENTER
Save & Exit…..MENU (twice)
DC Voltmeter