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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
CIRCUIT DESCRIPTION
Setting the batteries or AC adaptor (see figure 8) When setting the batteries or AC adaptor, the voltage VDD2 is always applied to RAM and CPU since Q6 and IC5 are turned on. Power on sequence (see figure 8) When the power switch is turned on, PON signal is being H (PON = VDD2). CPU knows to turn the power switch on, it provides H from VCON terminal to base of transistor Q5. Then both transistors Q5 and Q4 are turned on, the voltage VDD1 is applied to all devices. Power off sequence (see figure 8) When the power switch is turned off, POFF signal is being H(POFF= VDD2). CPU knows to turn the power switch off, VCON signal and base of Q5 will be L. Then both transistors Q5 and Q4 are turned off, Q4 stops to supply the voltage VDD1. Power down sequence (see figure 8) If the voltage across the batteries lowers and the terminal DPW of CPU comes less than 4.5V, VCON signal is L. Then both transistors Q5 and Q4 are turned off, Q4 stops to provide the voltage VDD1. Print sequence (see figure 8) When the PRINT button is pressed, TCON signal is H. Then both transistors Q2 and Q3 are turned on, the voltage VP for printing will be 12V.
12.0V 12.0V
Q6
5.0V 5.0V
Q3 Fuse
12.0V 12.0V 11.6V 0V 11.6V 12.0V
11.3V 12.0V
IC5
11.3V 12.0V 0V 0V
5.0V 5.0V
VP (+12 V) VDD2 (+5 V)
Q4
5.0V 5.0V 5.0V 0V
VDD1 (+5 V)
+
+ +
12.0V 12.0V 0V 0V 0V 0V 4.6V 4.6V
4.4V 5.0V
Q2
4.8V 0V
0.1V 5.0V
Q5
0V 0V
GND
VDD1
VCON DPW IC1 PON VDE TCON ON POFF
CPU
OFF
Power Switch Note : The voltages around transistors mean as follows; Upper figure : Power ON at no operation. Lower figure : Power OFF. Figure-8
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