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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
AV-25LS AV-25LX
STATIC CONVERGENCE ADJUSTMENT
1. Input a crosshatch signal.
(FRONT VIEW)
2. Using 4-pole convergence magnets, overlap the red and blue lines in the centre of the screen (Fig. 4) and turn them to magenta (red/blue). 3. Using 6-pole convergence magnets, overlap the magenta(red/blue) and green lines in the centre of the screen and turn them to white. 4. Repeat 2 and 3 above, and make best convergence.
(FRONT VIEW) TOP Fig. 4
DYNAMIC CONVERGENCE ADJUSTMENT
1. Move the deflection yoke up and down to adjust the pin cushion distortion in the screen top and bottom. (Fig. 5) 2. Move the deflection yoke left to right to overlap the lines in the periphery, and match the Yv. (Fig. 6) 3. Using the VR on the deflection yoke, match the YH (CROSS). (Fig. 7 and 9) 4. Repeat the steps 1 and 3 and obtain an optimum convergence. 5. Differential coil ADJUSTMENT. In case where the horizontal lines of red and blue around the centre of both sides of the picture as shown in Fig. 8, adjust the XV difference by using the differential coil on the top of the deflection yoke (Fig. 9) so as to minimize the XV difference.
(FRONT VIEW) RED GREEN BLUE YV BLUE GREEN RED RED GREEN BLUE BOTTOM Fig. 5
BLUE GREEN RED YV Fig. 6 (FRONT VIEW) RED YH GREEN BLUE
� After adjustment, fix the wedge at the original position.
Fasten the retainer screw of the deflection yoke. Fix the 6 magnets with glue.
BLUE
RED GREEN BLUE
VR
GREEN RED
FRONT
BLUE GREEN YH Fig. 7 RED
XV coil
Fig. 9
(FRONT VIEW)
Xv
GREEN
Fig. 8
No. 51848B
9
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