This service manual is a good copy of the original, complete and fully readable. It is really useful to repair my Tv set following its clear instructions.
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
Text excerpt from page 49 (click to view)
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6.4 SYSTEM MICROCOMPUTER TEST PROGRAM
A
- PCL output
In the normal operation mode (with the detachable panel installed, the ACC switched ON, the standby mode cancelled), shift the TESTIN (Pin 5) terminal to H. The clock signal is output from the PCL terminal (Pin 62). The frequency of the clock signal is 786.432kHz that is one 4th of the fundamental frequency. The clock signal should be 786.432kHz ± 32Hz. If the clock signal is out of the range, the X'tal (X601) should be replaced with new one.