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Very good quality original datasheet!I like this amazing website!!!!!!
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Excellent just what I needed to replace the electrolytic caps and make this old gem a beauty again. Was as scan of the original photocopied service manual.
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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
SIF (NICAM/A2) ADJUSTMENT
No. Adjustment point 1 VCO COIL T2300 Adjusting condition/procedure 1. Receive �PAL COLOUR BAR� signal. 2. Connect DC Voltmater to Main Board socket SC304 pin 1. 3. Check and turn T2300 counter-clockwise (Left) so that DC voltmeter appear 0V, then turn it clockwise (Right) so that DC voltmeter appear 5V. After that , turn T2300 counter-clockwise (Left) until DC voltmeter appear 2.5 ± 0.1 Vdc. ** UNIT BOARD ADJUSTMENT Vcc IF Input Freq 5V ± 0.1Vdc 38.9MHz ± 10KHz Waveform or others 1 BEAM PROTECTOR
PROTECTOR OPERATION CHECKING
No. Adjustment point Adjustment condition/procedure 1) Receive "Monoscope Pattern" signal. 2) Set CONTRAST MAX. 3) Set BRIGHT MAX. 4) During the Collector & Emitter of Q853/4/5 short, make sure the protector ON and switch to standby mode. 1) Receive "Monoscope Pattern" signal. 2) Connect output of Bias Box to D602 cathode (C602 positive). 3) Set voltage of Bias Box to 18V and make sure the protector is not working. 4) Set voltage of Bias Box to 24.5V, and make sure the protector is working. 3 OTHER PROTECTOR 1) Once finish rectified Electrolytic Capacitor short testing in +B line, check all possible damaged components on +B line. (Use random selected set for inspection) Waveform or others * Select one of Q853/4/5 to do each short.
2
H, V PROTECTOR
Adjust T2300 until TP2300 (NICAM BOARD TEST POINT) become 2.5 ± 0.1Vdc. Check after assembly NICAM BOARD Test point: Main Board socket SC304 pin 1. Preset selected receptiion frequency (AFT OFF) Check Voltage 2.5 ± 0.1Vdc. Precaution: The Vcc, fo and other factors are considered in the unit board of the 1.0V tolerance which differ from the adjustment accuracy.
A/V INPUT, OUTPUT & COMPONENT IN CHECKING
No. Adjustment point 1 VIDEO AND AUDIO OUTPUT CHECK Adjustment condition/procedure 1) Receive the "PAL Colour Bar" signal (100% White Colour Bar, Sound 400 Hz 100% Mod.) 2) Terminate the Video output with a 75 ohm impedance. Make sure the output is as specified (1.0 Vp-p ±3 dB). 3) Terminate the Audio output with a 10K ohm impedance. Make sure the output is as specified (1.2 Vp-p ±3 dB). 1) Using the TV/VIDEO key on the remote controller, make sure that the modes change in order of TV, AV1, AV2 & TV again and the video & audio output are according to the input terminal for each mode. 1) Connect YUV & Audio signal to Component In terminal and Audio terminal. 2) Using the TV/VIDEO key on the remote controller, press it until the modes change to COMPONENT, confirm output appears. Waveform or others
13
2 3
VIDEO AND AUDIO INPUT CHECK
COMPONENT IN CHECK
21H-FV5RU
13-1
13-2
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