TO ENTER SERVICE MODE
Prepare normal remote control unit. (Part No. N0121UD or N0134UD) Remove 3 Screws from the back lid.
Add J1 (Jumper Wire) to the remote control CBA.
Service mode:
- Use the service remote control unit.
- Turn the power on. (Use main power on the TV unit.)
- Press "SLEEP" button on the service remote control unit. Version of microcomputer will display on the CRT. (Ex: 200-0.07 or 054-0.13)
When CPU
version is 054-0.13: Check the display on the lower left is "00" and
if it is not "00", set it at "00" according to "3-1
FRENCH, ACCESS CODE, VIDEO TONE".
When CPU version is 200-0.07: Confirm that the character
of U ( U.S.A. model ) is indicated on the bottom left of the CRT. If the
character of C ( CANADA model ) is indicated, perform "3-1 Setting for FRENCH
data Values".
- DC 105V Adjustment.
Symptom of Maladjustments: The picture is dark and the unit
does not operate correctly.
Note: TP601, TP300(GND), VR661 --- Main CBA
- Connect DC Volt Meter to TP601 and TP300(GND).
- Adjust VR661 so that the voltage of TP601 becomes +105±0.5V DC.
BLACK STRETCH ADJUSTMENT
Purpose: To show the fine black color.
Symptom of Misadjustment: Black color will not appear
correctly.
Note: Use Service remote control unit.
- Enter the Service mode.
- Press "6" button on the Service remote control unit. "B-S" is indicated.
- Press "CH UP/DN" buttons on the Service remote control unit so that display will change " OFF ", "0", " 1 ", " 2 " and " 3 ". Then choose " B-S OFF ".
- Press "6" button on the Service remote control unit. " B-S*2 " is indicated.
- Press "CH UP/DN" buttons on the Service remote control unit so that display will change "0", " 1 ". " 2 " and " 3 ". Then choose " B-S*2 0 ".
- Turn the power off and on again. (Main power button on the TV unit.)
Setting for 7F and FRENCH data Values
General
- Enter the Service mode.
- Press "VOL DN" button on the Service remote control unit. Display changes " C/D ", " VCO ", " 7F ", " FRENCH ", " ACCESS CODE ", " STEREO ", " VIDEO TONE ", " FM-MODE " and " AV-OUT " cyclically when "VOL DN" button is pressed.
- Press " VOL DN " button on the Service remote control unit. Then select 7F display.
- Press "CH UP/DN" buttons on the Service remote control unit. Then choose 7F=FF.
- Press "VOL DN" button on the Service remote control unit. Then select FRENCH display.
- Press "CH UP/DN" buttons on the Service remote control unit. Then choose FRENCH=OFF.
ACCESS
CODE à set to
OFF
VIDEO TONE
à set to OFF
FM-MODE à set to ON
AV-OUT à set to OFF
STEREO à set to OFF
Note: C/D and VCO data
values do not need to be adjusted at this moment.
Setting for CONTRAST, COLOR, TINT, V-TINT and SHARP data Values
General
- Enter the Service mode.
- Press " MENU " button on the Service remote control unit. Display changes " BRIGHT ", " CONTRAST ", "COLOR ", " TINT ", " V-TINT " and " SHARP " cyclically when " MENU " button is pressed.
- CONTRAST (CNT)
Press
"CH UP/DN" buttons on the Service remote control unit so that the
value of " CONTRAST " (CNT) becomes 78.
- COLOR (CLR)
Press
"CH UP/DN" buttons on the Service remote control unit so that the
value of " COLOR " (CLR) becomes 58.
- TINT (TNT)
Press
"CH UP/DN" buttons on the Service remote control unit so that the
value of " TINT " (TNT) becomes 60.
- V-TINT (V-TNT)
Press
"CH UP/DN" buttons on the Service remote control unit so that the
value of " V-TINT " (V-TNT) becomes 62.
- SHARP (SHARP)
Press
"CH UP/DN" buttons on the Service remote control unit and select
" SHARP OFF ".
Note: BRIGHT data value does not need to be adjusted at this
moment.
- AGC Adjustment
Symptom of Misadjustment: AGC does not synchronize correctly
when RF input level is too weak and picture distortion may occur if it is too
strong.
- Enter the Service mode.
- Then press number " 2 " button on the Service remote control unit.
- Receive the Color Bar signal for channel 4 (67.25MHz). (RF Input Level: 60dBμV)
- Press "CH UP/DN" buttons so that the voltage of TP301 becomes +2.7±0.1V DC.
- Turn the Power off and on again. (Main power button on the TV unit.)
FM AGC Adjustment
- Enter the Service mode.
- Then press number "2" button twice on the remote control unit.
- Press CH UP/DN buttons so that the FM AGC (MAX) level is 127.
Purpose: Set Sub-bright Level
Symptom of Misadjustment: If Sub-brightness is incorrect,
Proper brightness can not be obtained by adjusting the Brightness Control.
Note: TP300 (GND), D316 (Cathode) à MAIN CBA
- Enter the Service mode.
- Press " MENU " button on the Service remote control unit and select " BRT " mode. (Display changes " BRT ", " CNT ", " CLR " and " TNT " cyclically when MENU button is pressed).
- Press "CH UP/DN" buttons on the Service remote control unit so that the value of " BRT " becomes 128.
- Turn the power off and on again. (Main power button on the TV unit.)
Purpose: To obtain correct vertical width of screen image.
Symptom of misadjustment: If V. Position is incorrect, vertical
height of image on the screen may not be properly displayed.
Use
Service remote control unit
- Operate the unit for at least 20 minutes.
- Enter the Service Mode.
- Receive the Monoscope Pattern.
- Press " 9 " button on the Service remote control unit and select " V-P " mode. (Display change " V-S " and " V-P " cyclically when " 9 " button is pressed).
- Press "CH UP/DN" buttons on the Service remote control unit so that the top and bottom of the monoscope pattern will be equal of each other.
- Turn the Power off and on again. (Main power button on the TV unit.)
V. Size Adjustment
Operate
the unit for at least 20 minutes.
- Enter the Service mode.
- Receive the Monoscope Pattern.
- Press " 9 " button on the Service remote control unit and select " V-S " mode. (Display changes " V-S " and " V-P " cyclically when " 9 " button is pressed).
- Press "CH UP/DN" buttons on the Service remote control unit so that the monoscope pattern will be 90±5% of display size and the circle is round.
- Turn the power off and on again. (Main power button on the TV unit.)
H. Position Adjustment
Operate
the unit for at least 20 minutes.
- Enter the Service mode.
- Receive the Monoscope Pattern.
- Press " 8 " button on the remote control unit and select " H-P " mode.
- Press "CH UP/DN" buttons on the Service remote control unit so that the monoscope pattern will be 90±5% of display size and the circle is round.
- Turn the Power off and on again. (Main power button on the TV unit.)
Cut-off Adjustment
Purpose: To adjust the beam current of R, G, B, and screen voltage.
Symptom of Misadjustment: White color may be reddish,
greenish or bluish.
Note: Screen Control FBT à Main CBA
F.B.T= Fly
Back Transformer
Use
Service remote control unit
- Degauss the CRT and allow CRT to operate for 20 minutes before starting the alignment.
- Input the Black Raster Signal from RF Input.
- Enter the Service mode.
- Press "VOL DN" button on the Service remote control unit and select " C/D " mode. (Display changes " C/D ", " VCO ", " 7F " and " FRENCH " cyclically when "VOL DN" button is pressed.) then press " 1 ". The display will momentarily show " CUT OFF R " (R= Red). Now there should be a horizontal line across the center of the picture tube. If needed gradually turn the screen control on the flyback, clockwise until the horizontal line appears. Adjust the Red Cut off by pressing the "CH UP/DN" buttons. Proceed to Step 5 when the Red Cut off adjustment is done.
- Press the " 2 " button. The display will momentarily show " CUT OFF G " (G=Green). Adjust the Green Cut off by pressing the "CH UP/DN" buttons. Proceed to step 6 when the Green Cut off adjustment is done.
- Press the " 3 " button. The display will momentarily show " CUT OFF B " (B=Blue). Adjust the Blue cut off by pressing the "CH UP/DN" buttons. When done with steps 4, 5 and 6 the horizontal line should be pure white if not, then attempt the Cut off adjustment again.
