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Downloaded the manual, reasonably straightforward, pretty much exactly as advertised.
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very helpfull
circuit diagram and sparepart list available
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Very good reproduction (copy) of original manual. Didn't have a parts list, but schematic was completely labeled with parts. Complete instructions on how to adjust mechanical functions of the 8-track deck. Well worth having and at a very reasonable cost.
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It's a full manual. All the parts are in there. I haven't found the problem yett, but I am working on it; hope I can rebuild the part myself. To make it more secure and unbreakable this time. Because the part has failed several times before and costs a lot to let it be repaired.
Thanks so much for this rich illustrated and parted manual.
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I downloaded the document. The manual was complete, well scanned and everything was legible. I could zoom in see what I needed to know. There's not much more that you can ask.
AV21BT7ENS / AV21BT7ENB AV21BT7EPS / AV21BT7EPB AV21BT7EES / AV21BT7EEB
Item 4:3 HORIZONTAL SHIFT Adjustment
Measuring instruments Signal generator
Test point
Adjustment part Adjust 12 ( 4 : 3 ) Adjust 23 ( 16 : 9 ) 1. 2. 3. 4.
Description Receive a RED test pattern. Set < 4 : 3 aspect mode >. Select < ADJUST 12 > from SERVICE MENU. Change horizontal shift till the picture is horizontally centered. Check whether this adjustment is correct after completing Service Mode Adjustment. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too.
VERTICAL SLOPE Adjustment
Signal generator
Adjust 13 ( 4 : 3 ) Adjust 24 ( 16 : 9 )
1. 2. 3. 4.
Receive a cross-hatch signal. Set < 4 : 3 aspect mode >. Select < ADJUST 13 > from SERVICE MENU. Change vertical slope till the size of squares on both the upper and lower part of test pattern become equal to the squares laying on the vertical centre of the test pattern. Check and readjust VERTICAL SLOPE item if the adjustment becomes improper after some other geometric adjustments are done. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too.
VERTICAL AMPLITUDE Adjustment
Signal generator
Adjust 14 ( 4 : 3 ) Adjust 25 ( 16 : 9 )
1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 14 > from SERVICE MENU. Change vertical slope till horizontal black lines on both the upper and lower part of the test pattern become very close to the upper and lower horizontal sides of picture tube and nearly about to disappear. Check and readjust VERTICAL AMPLITUDE item if the adjustment becomes improper after some other geometric adjustments are done. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too.
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No. 51878
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