TOSHIBA VTV1402B
Service Manual

ELECTRICAL ADJUSTMENTS
2-10: VERTICAL LINEARITY NOTE: Adjust after performing adjustments in section 2-9. 1. Receive the cross hatch signal from the Pattern Generator. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control to select "H/V". The Fig. 2-4 appears on the display. 4. Press the channel button (5) on the remote control to select "V. LIN 50/60". 5. Press the PLAY or STOP button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum. 6. Receive the cross hatch signal of NTSC. (Audio Video Input) 7. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~5. 2-11: VERTICAL POSITION NOTE: Adjust after performing adjustments in section 2-10. 1. Receive the center cross signal from the Pattern Generator. 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control to select "H/V". The Fig. 2-4 appears on the display. 4. Press the channel button (4) on the remote control to select "V. POSI 50/60". 5. Press the PLAY or STOP button on the remote control until the horizontal line becomes fit to the notch of the shadow mask. 6. Receive the center cross signal of NTSC. (Audio Video Input) 7. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~5. 2-12: OSD HORIZONTAL 1. Using the remote control, set the brightness and contrast to normal position. 2. Activate the adjustment mode display of Fig. 1-1 and press the channel button (5) on the remote control to select "OTHERS". The Fig. 2-2 appears on the display. 3. Press the channel button (4) on the remote control to select "OSD H". 4. Press the PLAY or STOP button on the remote control until the difference of A and B becomes minimum. (Refer to Fig. 2-5) 2-13: SUB BRIGHTNESS 1. Receive the monoscope pattern (80dB). (RF Input) 2. Using the remote control, set the brightness to minimum position and contrast to maximum position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control to select "PICTURE". The Fig. 2-6 appears on the display. 4. Press the channel button (1) on the remote control to select "BRIGHT". 5. Press the PLAY or STOP button on the remote control until the white 25% is starting to be visible. 6. Receive the monoscope pattern. (Audio Video Input) 7. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~5. 1. BRIGHT 2. CONTRAST 3. COLOUR 4. TINT 5. SHARPNESS 6. OSD CONT 7. 8.

0. RETURN

Fig. 2-6 2-14: SUB COLOR 1. Receive the color bar pattern. (RF Input) 2. Using the remote control, set the brightness, contrast and color to normal position. 3. Connect the synchro scope to TP801. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control to select "PICTURE". The Fig. 2-6 appears on the display. 5. Press the channel button (3) on the remote control to select "COLOR". 6. Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white 100% and 0% is set to 4 scales on the screen of the oscilloscope. 7. Press the PLAY or STOP button on the remote control until the red color level is adjusted to 95% of the white level. (Refer to Fig. 2-7) 8. Receive the color bar pattern. (Audio Video Input) 9. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~7. White 0%

0% [ TV ] 95%

OSD H

Red Level White 100% Fig. 2-7

A

B

Fig. 2-5