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Great service. Fast response. High quality scan. Good price.
Thank you very much!!!
Well-scanned, complete manual. Contains the information needed for repair and maintenance.
It's great to be able to obtain a precious technical information for a real old equipment. The one I got helps me a lot in the area of wiring diagram to repair my antique. PDF gave me clear enough information to find out thr details. Thanks for giving me the oppotunity to be able to access to almost vanished informations.
Another excellent aquisition. Fine detailed manual. Thanks
Good quality for the scan, complete, but as usual for Tascam, not so comprehensive !
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.
MPU AD-PORT OUTPUT
VOLTAGE LEVEL DETECTION
13K 1 2 3 8 470 L5
10K 7 4 6 5
D309 IC9 (2/2)
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.
4 3 7 2 6 10 13 H/U-GND 1 5
Q301 to H/U
47 47 REQC
Q305 from Q307 MPU
Q303 H/U GND CONSTANT CURRENT
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.
to OTHER AMP TRANSMISSON RECEIVE
4.3K 4.3K 270
24 13 270 CLK
SX VCC 2 7
20K 12K 1.8K
3 6 1.8K TX RY GND TY 47
to MPU TRANSMISSON RECEIVE
DATA 10u25 10K
BOTH DIRECTION BUFFER
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