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It was helpful to get schematic with waveforms in important points and lot of service information. Manual is good quality, fast delivered. Of course it is hardcopy of paper one with all its disadvantages.
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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.
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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
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Complete manual including mechanical part in good pdf quality. Shaded greys of the pcb due to pdf not perfect but usable.
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Nice pdf file of the manual sent promptly. Thanks.
ARCANCE 37, 55, 55 FLAT, 72 FLAT
Abgleich / Alignment
Alignment
Carry out the alignment with the unit at operating temperature (about 15 min.). All adjustment controls not mentioned in this description are pre-set at the factory and must not be re-adjusted in the case of repairs. Start of the Service Mode: Via "MENU" �> Service Code "8500". End the Service Mode: Press stand by button "6". Measuring instruments: 100MHz oscilloscop with 10:1 test probe, digital voltmeter, colour video generator. Service works after replacement or repair of the following modules: - Power supply: alignment 1 - IF: alignment 2, 3 - CRT, CRT panel: alignment 5�9 - Deflection: alignment 6, 7 - N201 (IF/Video/Chroma IC), N102 (EEPROM): alignment 2�5 and 7�9 - Tuner: alignment 2, 3
Alignment 1. +B voltage
Preparations
Alignment Process
This voltage must be checked and re-adjusted if necessary Adjust +B to the values below with VR601: after every repair and before every alignment. Size Voltage Value Brightness: Minimum P 37-5211 115V Contrast: Minimum T 55-5211 110V Digital voltmeter: Cathode VD624 TF 55-5211 115V TF 72-5211 130V Colour video generator: Feed in a test patter via the aerial. With L204 set the DC level to 3.4±0.1V. Digital voltmeter: IC N201 / Pin 47
2. AFT
3. AGC
Start the Service Mode; call up the dialog line "RF AGC" via With button V- oder V+ set the value to "20". menu 4 (button "4") with button P- or P+. Start the Service Mode; call up the dialog line "OSD H With button V- or V+, move the broadest menu to the DISPLAY" via menu 3 (button "3") with button P- or P+. picture screen centre. Start the Service Mode; call up the dialog line "SC" via With "SCREEN" control (lower control at the splitter menu 5 (button "5") with button P- or P+. transformer) adjust the line so that it is just well visible. Switch on the horizontal line with button V+. Colour video generator: Feed in a convergency test pattern. Contrast: maximum Set the screen brightness so that the black background of the test pattern just starts to brighten. With "FOCUS" control (upper control at the splitter transformer) adjust the vertical lines approx. 5cm from the right and left picture edge to minimum horizontal width. The sharpness in the middle must not seem to be worse than the sharpness at the edges. If necessary, take an average.
4. OSD
5. Screen grid voltage
6. Line sharpness
7. Geometry
Feed in a geometry test pattern. Start the Service Mode; call up menu 3 (button "3"). Select "H-PHASE" with button P- or P+. Adjust according to the test pattern using button V- or V+.
7.1 Horizontal position 7.2 Vertical position 7.3 Vertical size 7.4 Vertical linearity 7.5 S-correction
Select "V.POSI" with button P- or P+.
Adjust according to the test pattern using button V- or V+.
Select "V.SIZE" with button P- or P+. Select "V.LIN" with button P- or P+.
Adjust according to the test pattern using button V- or V+. Adjust according to the test pattern using button V- or V+.
Select "V SC" with button P- or P+.
Adjust according to the test pattern using button V- or V+.
GRUNDIG Service
2-3
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