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There are currently no product reviews.
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Manual was a good representation of service infomation for the EWV404. It worked well for my repair.
 ;
Great quality copy, right what I was looking for, all I need to fix my radio.
Thanks
;
I BOUGHT A PAIR OF INFINITY VINTAGE SPEAKERS THAT REQUIRED TO BE REPAIRED AND THE ELECTRONIC TECHNICIAN ASKED ME FOR THE SERVICE MANUAL.
I TRIED TO GET IT AT THE MANUFACTURER'S SITE WITH NO SUCCESS, SO I STARTED TO LOOK FOR IT IN THE WEB FOR A LONG TIME, UNTIL I FOUND THE SERVICE MANUAL IN THIS EXCELLENT SITE "OWNER'S MANUAL.COM".
NOW I HAVE MY SPEAKERS WORKING AND ENJOYING THE MUSIC I LIKE.
THANKS TO "OWNER`S MANUAL.COM" I RECOMMEND THIS SITE TO EVERYONE.
;
Very quick response. Very good and accurate print quality of the scanned document.
;
The service manual was very usable and clear enough to see the individual values of all of the components (unlike some of the service manuals I have gotten in the past from web sites similar to this one). The price was right and the information was greatly appreciated. It helped me with an otherwise very difficult repair. It was much needed and appreciated. A faster turn around on my order would be nice, but I understand the constraints on your staff's time. Thank you for your service.
KAC-PS621/X621
CIRCUIT DESCRIPTION
� Current detection circuit
Amplify and rectify potential differences at two points in the primary-side current circuit and send it to the AD-port of the MPU and obtain data for displaying current value.
1K
MPU AD-PORT OUTPUT
0.01
0.01
VOLTAGE LEVEL DETECTION
13K 1 2 3 8 470 L5
10K 7 4 6 5
D309 IC9 (2/2)
15K
10K
IC9 (1/2)
AMP RECT
� Constant current output circuit
Remove troubles caused by the potential differences between the constant current output and the GND, so that the GND potential differences between the H/U and the AMP is not overlapped in the AMP to H/U communication.
J3
4 3 7 2 6 10 13 H/U-GND 1 5
AD-I
8
Q301 to H/U
47 47 REQC
Q305 from Q307 MPU
10K 10K
12
10u35 +
11
9
Q303 H/U GND CONSTANT CURRENT
AMP GND
� I2C buffer
Using an IC for I2C communication, between-AMP communication is conducted so that there will be no trouble from GND potential differences.
5
to OTHER AMP TRANSMISSON RECEIVE
4.3K 4.3K 270
J4
24 13 270 CLK
D302
SX VCC 2 7
100K
20K 12K 1.8K
IC3
RX SY
3 6 1.8K TX RY GND TY 47
10 11
79
1 8
to MPU TRANSMISSON RECEIVE
1.5K 1.5K
DATA 10u25 10K
D301
BOTH DIRECTION BUFFER
ADJUSTMENT
No. 1 Item IDEL CURRENT VR2 (Rch) check land A, B. Alignment Point VR1 (Lch) Method Connect a DC voltmeter between 2.5mV 2 minutes (X09-577) Align For Note After Power on Fig. PC board
4 5
68
270
7
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