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The manual was very clear and contained all the information I was looking for. My dishwasher is working again because of this servicemanual!
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Quality scan, great manual. I solved my problem with this manual.
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The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
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Perfect source for service manuals: fast and professional transaction; high quality, perfect readable and largely scaleable PDF; complete schemes, diagrams and spare part list. Tnx a lot, cu again!!!!
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I got your link from a friend and I must say that I am really satisfied with your service. Specially this B&O manual I didn't find anywhere on the web... but you could deliver it :-) . You deliver very fast and the copy is of good quality. So your webpage is bookmarked. Thanks
ELECTRICAL ADJUSTMENTS
2-10: CUT OFF 1. Set condition is AV MODE without signal. 2. Using the remote control, set the brightness and contrast to normal position. 3. Place the set with Aging Test for more than 15 minutes. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (00) on the remote control to select "CUT OFF". 5. Adjust the Screen Volume until a dim raster is obtained. 2-11: WHITE BALANCE NOTE: Adjust after performing CUT OFF adjustment. 1. Place the set with Aging Test for more than 15 minutes. 2. Receive the gray scale pattern from the Pattern Generator. 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 (03) on the remote control to select "R DRIVE". 5. Press the LEFT/RIGHT button on the remote control to select the "R DRIVE", "G DRIVE", "M R CUT OFF" or "M G CUT OFF". 6. Adjust the LEFT/RIGHT button on the remote control to whiten the R DRIVE, G DRIVE, M R CUT OFF, and M G CUT OFF at each step tone sections equally. 7. Perform the above adjustments 5 and 6 until the white color is looked like a white. 2-12: BRIGHT CENT 1. Receive the PAL 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 (17) on the remote control to select "BRIGHT CENT". 4. Press the LEFT/RIGHT button on the remote control until the screen begin to shine. 5. Receive the PAL black pattern*. (Audio Video Input) 6. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~4. 7. Press the DVD button on the remote control to set to the DVD mode. 8. Activate the adjustment mode display of Fig. 1-1 and press the channel button (17) on the remote control to select "BRIGHT CENT". 9. Press the LEFT/RIGHT button on the remote control to set the same step numbers as the AV mode. *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. Fig. 2-2 2-13: CONTRAST CENT 1. Activate the adjustment mode display of Fig. 1-1 and press the channel button (22) on the remote control to select "CONT CENT". 2. Press the LEFT/RIGHT button on the remote control until the contrast step No. becomes "30". 3. Receive a broadcast and check if the picture is normal. 4. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 1~3. 5. Press the DVD button on the remote control to set to the DVD mode. 6. Activate the adjustment mode display of Fig. 1-1 and press the channel button (22) on the remote control to select "CONT CENT". 7. Press the LEFT/RIGHT button on the remote control to set the same step numbers as the AV mode. 2-14: COLOR CENT 1. Receive the PAL color bar pattern. (RF Input) 2. Using the remote control, set the brightness, contrast and color to normal position. 3. Connect the oscilloscope to TP803. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (25) on the remote control to select "COLOR CENT". 5. 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. 6. Press the LEFT/RIGHT button on the remote control until the red color level is adjusted to 90 ± 10% of the white level. (Refer to Fig. 2-2) 7. Receive the PAL color bar pattern. (Audio Video Input) 8. Press the AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~6. 9. Press the DVD button on the remote control to set to the DVD mode. 10. Activate the adjustment mode display of Fig. 1-1 and press the channel button (25) on the remote control to select "COLOR CENT". 11. Press the LEFT/RIGHT button on the remote control to set the same step numbers as the AV mode.
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