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I want to give you a real heads-up for your desire to enable such people as I to acquire the information I need to maintain the older types of equipment such as this Akai HXA351W. You do a swell job with all the processes you have to perform so I can have a legible, thus usable
document which does not send me crazy trying to figure out the blurry text of a bad copy.
Very well done, Thomas.
;
This manual is very well presented and after printing out looks about as close to an original as I think you can get. The quality is second to none.
The content of the manual is comprehensive and I think it would be well suited to an audio repair professional which I'm not but I did find it very informative and helpful.
The cost of the manual is more than covered by the money I'll save when I change the keep memory battery now I have the relavant info.
Very pleased with my purchase and can recommend it wholeheartedly as I can other manuals I've downloaded from this site.
Regards
Limey Alex
 ;
Complete manual including mechanical part in good pdf quality. Shaded greys of the pcb due to pdf not perfect but usable.
;
Nice pdf file of the manual sent promptly. Thanks.
;
Complete MFG Service Manual at a good price FAST !
PURITY CONVERGENCE ADJUSTMENT
NO. Adjustment part Adjusting procedure conditions Waveform and others
PURITY ADJ. GREEN-ONLY Adjust 1 CONVERGENCE 1. Receive the "Crosshatch Pattern" signal. BGR
beam current to ~ 700 µA. ADJ. 2. Using the remote controller, call NORMAL
R 3. Maintain purity magnet at the zero magadjustment.) Static convergence
2. Degauss CRT enough with the degausing (To be done mode. B
coil. a b G after the purity
4. Observe the points a, b, as shown in Fig. 1-1 colours. Fig. 1-1 A rank requirement. angle in order to superpose the green colour
G
netic field and keep static convergence 1. Turn the 4-pole magnet to a proper opening roughly adjusted. angle in order to superpose the blue and red Fig. a
RGB through microscope. Adjust the landings R 5. Orient raster rotation to 0 eastward. over the blue and red colours.
2. Turn the 6-pole magnet to a proper opening
6. Tighten up the deflection coil screws. B
» Tightening torque: 108N ± 20 N Dynamic convergence
7. Make sure CRT corners landing meet screen in the following steps. Fig. b
(11kgf ± 2 kgf) 1. Adjust convergence on fringes of the A
B
A rank requirements. If not, stick magnet RGB a) Fig. a : Drive the wedge at point "a" and sheet to correct it. B swing the deflection coil upward. G Note:This adjustment must be done after b) Fig. b : Drive the wedge at point "b" and "c" R warming up unit for 30 minutes or and swing the deflection coil downward. longer with a beam current over 700 c) Fig. c : Drive the "c" wedge deeper and
A = B µA.
swing the deflection coil rightward. Fig. 1-2
R G
* For following colours press R/C RGB key to d) d : Drive the "b" wedge deeper and Fig. c
(on right of the CRT)
change. Rank "A" swing the deflection coil leftward. BGR 3. Apply lacquer to the deflection yoke lock screw,
A
2. Fix all wedges on the CRT and apply glass tape over them. B magnet unit (purity, 4-pole, 6-pole magnets) and magnet unit lock screw. Fig. d Green-only Blue-only Red-only
7
B on the screen.
Finally received the Red-only and Blue-only signals to make sure there is no other colours Wedge "a"
screen cleared
A = B
Signal-colour About 100°
4-pole magnet 6-pole magnet CRT neck Fig. 1-3
Lacquer
(on left of the CRT) Wedge
Rank "A"
"b" "c"
* Press R/C RGB key for 1 second in NORMAL MODE, the colLacquer our will change to RGB mono Purity magnet colour mode.
20mm
21GT-22
7-1 7-2
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