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I was having a hard time finding the problem with this Mackie 1604 unit. I didn't have a schematic. Went looking on the web and found your site and the price was more then reasonable. Ordered it and within the hour had the manual and within 15 minutes had the unit fixed. Best $4.99 I ever spent. Thank you.
Doug
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This is a service manual in every sense of the word ( French and German versions of the text are included, as well as English..)
There are explanations of the mechanical and electrical functions, plenty of mechanical drawings, and the needed schematics. The quality of the scanning is excellent - all the component values are clearly legible - and very usefully there are pcb component layouts, so you can find a component on the schematic, and then very quicky pinpoint its physical location on the relevant pcb.
I cannot see how I can give this manual any less than the maximum 5 stars! Great value for money, which will pay for itself immediately. Excellent all round!
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the manual is great and especially hard to find... thanks for the great service and having a hard to find manuel_
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Please tell us what you think and share your opinions with others. Be sure to focus your comments on the product. You will receive $2.50 of store credit for Your review.
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hat alles sehr gut geklappt. Das Servicemaual ist gut zu verwenden. Die Pläne und Schrift
ist klar und leserlich. Außerdem preiswert. Grüße an alle Hifi-Bastler
KD-S901R
3.2.1 Feed section
Is the voltage output at IC521 pin "40" 5V or 0V? YES Is 4V present at both sides of the feed motor? YES Check the feed motor.
3.2.2 Focus section
NO
Is the wiring for IC561 pin 27? NO
YES Is 3.3V present at IC561 pin "20"? YES Check the vicinity of IC521. YES Check the feed motor connection wiring.
NO Check CD 8V and 5V.
NO
Is 6V or 2V present at IC561 "4" and "5"? NO Check IC501.
When the lens is moving: 4V
Does the S-search waveform appear at IC561 pins "8" and "9"?
NO
Check the circuits in the vicinity of IC561 pins "8","9"and"15".
YES YES
Check the pickup and its connections
3.2.3 Spindle section
Is the disk rotated? YES Does the RF signal appear at RF test point? YES Is the RF waveform at RF test point distorted? YES Proceed to the Tracking section
3.2.4 Tracking section
NO
Is 4V present at IC561 pins "6" and "7"? YES Check the spindle motor and its wiring
NO
Is 4V present at IC521 pins "41" ? YES Check the vicinity of IC561.
NO
NO
Check IC521 and IC561.
Check the circuits in the NO vicinity of IC561 "19"~ "24" or the pickup
When the disc is rotated at first:
YES
Approx. 1.2V Is the tracking error signal output at IC501 "11"?
Check the circuit in the vicinity of IC501 pins "2"~"12".
YES
Check the pickup and its connections
YES Check IC541.
(No.49821)1-25
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