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KENWOOD KACX621
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of KENWOOD KACX621 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 7 (click to view)
KAC-PS621/X621
CIRCUIT DESCRIPTION
â 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

â 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

â 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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