MACKIE HR824 26 pages English-only Service Manual contains:
1) HR824 technical overview with the description of front and rear panel switches.
2) HR824 specs
3) Block Diagram
4) Wiring Diagram
5) Packaging management
6) Spare part & final assembly list (for PCB rev A and B) + exploded view
7) Test Procedures (where, how to measure voltage...) including Test Point diagram on the PCB.
8) IC and Transistor charts.
Excellent guide: very clear, good scan quality enabling us to print readable diagram :-)
Note:
Mackie HR824 make extensive use of surface mount devices (SMD). Service on the HR824 must
only be undertaken by experienced service technicians with the right tools, experience and patience to perform surface mount rework when needed.
This Service manual is very well scanned and its clean to read, no any anti-theft words that un-english could understand. I got my CCD600 working with this manual and it´s clear shematics :)
I was very pleased with the service provided and was surprised at how good the quality was of the manual. I thought it may be a third generation copy or so, but it is as good as the websites that charge 3 times this much. I repair some electronics for family and friends without charge, so this is perfect for me. Thank you very much.
Text excerpt from page 66 (click to view)
10-9. VCR VIDEO CIRCUIT
A. TROUBLE SHOOTING OF PREAMP IN THE PLAYBACK MODE.
IY04 : LA70001
IS THE SIGNAL FROM HEADS FED TO PIN1 AND PIN3 (LP MODE) OR PIN 5 AND PIN 7 (SP MODE) OF PAY01. OK IS ON/OFF 5V FROM PIN 76 OF IY01 SUPPLIED TO PIN 13 OF IY04 AT 5VOLTS ? NG CHECK ON/OFF 5V NG CHECK DRUM AND DECK MECHANISM.
OK IS REC (H) FROM PIN 19 OF IY01 SUPPLIED TO PIN 11 OF IY04 AT ZERO VOLTS ? NG CHECK REC (H)
OK IS H.AMP SW FROM PIN 16 OF IN01 SUPPLIED TO PIN 3 OF IY04 ? NG CHECK H.AMP SW
OK IS VIDEO SW FROM PIN 18 OF IN01 SUPPLIED TO PIN 4 OF IY04 ? NG CHECK VIDEO SW
OK IS TRICK(H) FROM PIN 21 OF IY01 SUPPLIED TO DN07 AT ZERO VOLT ?� NG CHECK TRICK (H)
OK IS THE SIGNAL FROM PIN1 AND PIN3 (LP MODE) OR PIN5 AND PIN7 (SP MODE) OF PAY01 FED NG CHANGE IY04
OK IS THE SIGNAL FROM PIN7 OF IY04 FED TO C354 ? NG CHECK PB EQ
OK CHECK VIDEO CIRCUIT
REC(H) : "HIGH" IN THE RECORD MODE
H.A SW : "HIGH" IN THE LP MODE "LOW" IN THE SP MODE TRICK(H) : "HIGH" IN THE TRICK PLAY
