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again you did a very good job. It was fast too. Photocopy are really readable and clear
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Probably it never existed a 1081 official service manual from Commodore, it's look more like a NAPCEC service manual & diagrams compilation of the 1084 series and his variants, like the nap6523, 8cm505, 1084S, 1084P and obviously the 1081. It's more complete than other scans and the quality of the scans also are far superior. It has two circuit diagrams variants of the 1081, mono and stereo versions. It doesn't include a diagram for the Philips CM8500 or CM8501, they look like the 1081 but they are slightly different.
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Rapid, clear well done as all the scheme I downloaded from this site. Great job very functional and very useful
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Great copy of the manual, has all information required for servicing,
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I work at an authorized service center and I can tell if a manual is as it should be. This one is. It may be a scan, but a very good one at that. The interesting part for me was the curcuit diagram which was scanned at high quality, making it as good as the original. I will definitely be back as a customer. I need not say this, but I will: the price was the best. Thank you owner-manuals.com .
ELECTRICAL ADJUSTMENTS
2-3: RF AGC 1. Receive the VHF HIGH (63dB). 2. Connect the digital voltmeter between the pin 5 of CP351 and the pin 1 (GND) of CP351. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (02) on the remote control to select "RF DELAY". 4. Press the VOL. UP/DOWN button on the remote control until the digital voltmeter is 2.9V. 2-8: HORIZONTAL PHASE 1. Receive the monoscope pattern. 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 (05) on the remote control to select "H PHASE". 4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum. 2-9: VERTICAL SHIFT 1. Receive the monoscope pattern. 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 (07) on the remote control to select "V SHIFT". 4. Press the VOL. UP/DOWN button on the remote control until the horizontal line becomes fit to the notch of the shadow mask. 2-10: VERTICAL SIZE 1. Receive the monoscope pattern. 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 (06) on the remote control to select "V SIZE". 4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum. 2-11: SUB BRIGHTNESS 1. Receive the monoscope 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 (13) on the remote control to select "BRIGHTNESS". 4. Press the VOL. UP/DOWN button on the remote control until the white 10% is starting to be visible 5. Receive the monoscope pattern. (Audio Video Input) 6. Press the INPUT SELECT button on the remote control to set to the AV mode. Then perform the above adjustments 2~4. 2-12: SUB CONTRAST 1. Activate the adjustment mode display of Fig. 1-1 and press the channel button (14) on the remote control to select "CONTRAST". 2. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "85" 3. Press the INPUT SELECT button on the remote control to set to the AV mode. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (14) on the remote control. 5. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "83"
(TV SECTION)
2-4: CONSTANT VOLTAGE 1. Connect the digital voltmeter to the R520. 2. Set condition is AV MODE without signal. 3. Using the remote control, set the brightness and contrast to normal position. 4. Adjust the VR502 until the digital voltmeter is 135 ± 0.5V. 2-5: CUT OFF 1. Adjust the unit to the following settings. R BIAS=128, G BIAS=128, B BIAS=128, BRIGHTNESS=128, CONTRAST=100 2. Place the set with Aging Test for more than 15 minutes. 3. Set condition is AV MODE without signal. 4. Using the remote control, set the brightness and contrast to normal position. 5. Activate the adjustment mode display of Fig. 1-1 and press the channel button (01) on the remote control to select "CUT OFF". 6. Adjust the Screen Volume until a dim raster is obtained. 2-6: WHITE BALANCE NOTE: Adjust after performing CUT OFF adjustment. 1. Place the set with Aging Test for more than 15 minutes. 2. Receive the color bar pattern. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (10) on the remote control to select "R.BIAS". 5. Using the VOL. UP/DOWN button on the remote control, adjust the R.BIAS. 6. Press the CH. UP/DOWN button on the remote control to select the "R.DRIVE", "B.DRIVE", "G.BIAS" or "B.BIAS". 7. Using the VOL. UP/DOWN button on the remote control, adjust the R.DRIVE, B.DRIVE, G.BIAS or B.BIAS. 8. Perform the above adjustments 6 and 7 until the white color is looked like a white. 2-7: FOCUS 1. Receive the monoscope pattern. 2. Using the remote control, set the brightness and contrast to normal position. 3. Turn the Focus Volume fully counterclockwise once. 4. Adjust the Focus Volume until picture is distinct.
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