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Received via e-mail this PDF manual is worth the money. This is a quality scan of a manual in excellent condition and is just as good as having the original manual in hand. I have later seen the original manual and it was printed in colour, but this particular manual is black & white but scan resolution is high end quality! All drawings and pictures are presented in great detail. So, nearly perfect score in my opinion.
If you own the turntable you also should own the manual!
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I was very satisfied with the service manual I ordered and downloaded. I will definitely buy again from this seller.
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Great product. Recieved it fast...exactly as advertised.
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Manuals were delivered promptly and were correct as advertised. No issues with the download link which was provided promptly after everything was processed. Very pleasant experience
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Paid for service manual & got the download fast - worth a visit if you need a service manual
KAC-X542
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
1K L5 2 3 8 68
10K 7 4 6 5 1 10K
IC6 (2/2)
IC6 (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 head unit and the AMP is not overlapped in the AMP to head unit communication.
J3
4 3 7
10u35
2 6 10 13
1 5
AD-I
8 12
Q95 to Head unit
47
100K
Q93 Q90
10K
11
9
47
from MPU
REQC
Q96
10K
Head unit-GND
Head unit 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 1 3 270 CLK
15K
D93
IC9
79 270 68 DATA 10u25 10K
1 8
SX VCC 3 6 1.8K TX RY 4 5
10 11
1.5K
D91
2 7
RX SY
220 20K 12K 1.8K
to MPU TRANSMISSON RECEIVE
GND TY
BOTH DIRECTION BUFFER
ADJUSTMENT
No. Item Alignment Point Method Connect a DC voltmeter between VR5 (A-Lch) 1 IDEL CURRENT VR6 (A-Rch) VR7 (B-Lch) VR8 (B-Rch) the following emitter resistors. R347 (A-Lch) R348 (A-Rch) R447 (B-Lch) R446 (B-Rch) 2.5mV Over 2 minutes aging is required. PC BOARD on page 10 and 11. Align For Note Fig.
1.5K
7
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