|
|
|
Who's Online
There currently are 6043 guests online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
Very good quality original datasheet!I like this amazing website!!!!!!
 ;
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.
;
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.
;
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
2-4.
AUDIO SYSTEM ADJUSTMENTS
� Adjust both Lch and Rch. [Connection]
Audio generator 600 � Attenuator VCR Audiolevel meter or distortion meter 47 k�
CH1 RF SWP
OK CH2 NG
AUDIO LINE IN Feed signal both channelssimultaneously.
AUDIO LINE OUT
Fig. 7-2-4.
2-4-1. Hi-Fi Audio System Adjustment � Set switches and knobs to the following positions to make adjustment unless otherwise specified. INPUT SELECT switch ................... LINE AUDIO MONITOR .......................... STEREO [Adjustment Sequence] 1. AF Switching Position Adjustment 2. Frequency Responce Check 3. Overall Level Characteristic and Distortion Factor Check 4. Overall S/N Check 1. AF Switching Position Adjustment (MA-325 Board) Purpose: Adjust the interval between A CH and B CH of tape playback output. Improve the interchangeability with other tapes and sets. When it is out of order, noisy sound is increased and big noise is heard. Mode Signal Measurement point Measuring Instrument Specified Value PB Alignment tape SP mode color bar CH2: Pin 1 of CN341 CH1: Pin 3 of CN501 Oscilloscope Fig. 7-2-5 Signal
Fig. 7-2-5.
2. Frequency Responce Check Purpose: Confirm that the frequency characteristic is within the specification. Mode REC and PB (SP, EP, LP mode) 400 Hz, �7.5 dBs 20 Hz, �7.5 dBs 20 kHz, �7.5 dBs Audio output terminal Audio level meter 0 ± 2 dB
Measurement point Measurement equipment Specified value
Note: Tape path adjustment must have been completed. Confirmation Method: 1) Supply a signal of 400 Hz, �7.5 dBs to both L and R channels of Audio Line Input. 2) Connect the audio level meter to the Audio Line Output. 3) Adjust the attenuator so that the audio level meter will indicate �7.5 dBs. 4) Make recording. 5) Set an audio line input signal to 20 Hz and make recording. 6) Set an audio line input signal to 20 kHz and make recording. 7) Playback a recorded portion, and measure output levels at 400 Hz and 20 Hz and 20 kHz. 8) Confirm that the 20 Hz and 20 kHz playback output level within a range of the 400 Hz playback output level 0 ± 2 dB.
Adjusting Method: 1) Connect MA-325 board JS161 to the GND for about 1 second to activate the RF switching position adjustment mode. 2) Press the PAUSE button to activate the AF switching position adjustment mode. 3) Check appear �HFxx� on FL display. 4) Using the PROGRAM + and � buttons, minimize a chipped portion. At this time, confirm that a noisy sound is not heard. 5) Press the PAUSE button. 6) Press the EJECT button.
7-3
|
|
|
> |
|
