AIWA VXS137
Service Manual

ELECTRICAL ADJUSTMENTS
2-14: SUB BRIGHTNESS 1. Receive the black pattern*. (RF Input) 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 (4) on the remote control. The Fig. 2-5 appears on the display. 4. Press the channel button (1) on the remote control. 5. Press the VOL. UP/DOWN button on the remote control until the screen begin to shine. 6. Receive the black pattern*. (Audio Video Input) 7. Press the TV/VCR button on the remote control to set to the AV mode. Then perform the above adjustments 2~5. *The Black Pattern means the whole black raster signal. Select the "RASTER" of the pattern generator, set to the OFF position for each R, G and B. 1. BRIGHT 2. CONTRAST 3. COLOR 4. TINT 5. SHARPNESS 6. OSD CONT 7. 8. 2-16: SUB TINT 1. Receive the color bar pattern. (RF Input) 2. Using the remote control, set the brightness, contrast, color and tint to normal position. 3. Connect the synchro scope to TP803. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control. The Fig. 2-5 appears on the display. 5. Press the channel button (4) on the remote control. 6. Press the VOL. UP/DOWN button on the remote control until the section "A" becomes a straight line. (Refer to Fig. 2-7) 7. Receive the color bar pattern. (Audio Video Input) 8. Press the TV/VCR button on the remote control to set to the AV mode. Then perform the above adjustments 2~6.

"A" 0. RETURN Fig. 2-5 Fig. 2-7 2-17: SUB CONTRAST 1. Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control. The Fig. 2-5 appears on the display. 2. Press the channel button (2) on the remote control. 3. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "82" 4. Press the TV/VCR button on the remote control to set to the AV mode. 5. Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control. The Fig. 2-5 appears on the display. 6. Press the channel button (2) on the remote control. 7. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "97" 2-18: SUB SHARPNESS 1. Activate the adjustment mode display of Fig. 1-1 and press the channel button (4) on the remote control. The Fig. 2-5 appears on the display. 2. Press the channel button (5) on the remote control. 3. Check if the step No. of SHARPNESS is "24". 4. Press the TV/VCR button on the remote control to set to the AV mode. Then perform the above adjustments 1~3. 2-19: OSD CONTRAST 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 (4) on the remote control. The Fig. 2-5 appears on the display. 3. Press the channel button (6) on the remote control. 4. Check if the step No. of OSD CONT. is "0". D2-3

2-15: SUB COLOR 1. Receive the color bar pattern. (RF Input) 2. Using the remote control, set the brightness, contrast, color and tint 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. The Fig. 2-5 appears on the display. 5. Press the channel button (3) on the remote control. 6. Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white 100% and 0% is set to 5 scales on the screen of the oscilloscope. 7. Press the VOL. UP/DOWN button on the remote control until the red color level is adjusted to 100 ± 5% of the white level. (Refer to Fig. 2-6) 8. Receive the color bar pattern. (Audio Video Input) 9. Press the TV/VCR button on the remote control to set to the AV mode. Then perform the above adjustments 2~7. White 0% 0%

100%

Red Level White 100% Fig. 2-6