Service Manuals, User Guides, Schematic Diagrams or docs for : GALLIEN-KRUEGER ML Serie`s gallien-krueger-ml-series-service-manual

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Service Manual

  ML Series
Table of Contents

Operating Instructions              3
Troubleshooting Instructions        8
Output Disabling                   10
Preamp Description                 12
Power Supply Start-up              15
ML/E Turn-On Procedure             19
ML/S Turn-On Procedure             21
Schematics                         27
Engineering Change Orders (ECOs)   38
ML/S Bill of Materials             53
ML/E Bill of Materials             60
                                                 Microamplifier Series- Lead
                                   Disassembly and Preliminary Troubleshooting Procedure
                                                 GK Document # 426-0063-A
                                   Model #'s: ML260E, ML260S, ML120E, ML120S- all options
                                                   2/15/91 Rev. 9/10/99 SW


Disassembly Procedure

1) Remove the bottom cover first by removing the six # 6 screws on the bottom and the three # 6 screws on each side. One side has an extra
   screw which may require a # 4 screwdriver. Note that the center screw on each side is a machine screw and will need to be returned to the
   tapped hole in the side of the heat sink when reassembling the unit. On a combo unit, removing only the side screws will allow the
   electronics to be lifted away from the speaker compartment. The wires connecting the speaker to the electronics should then be detached
   from the power amp.

2a) ML-S: The ML-S preamp removes easily by removing the three # 6 flat head screws attaching the front panel to the heat sink.

2b) ML-E: The ML-E preamp requires the same three screws to be removed. Also, at the rear panel, remove the two # 2 screws that
secure the RFG4 jack and the two # 6 screws holding the balanced outs in place. Using a 15mm nut driver, remove the plastic nuts from the
Stereo Aux. In, Return, and Send jacks. Pull the preamp board out and away from the rear panel being careful not to lose the fiber washers
from the 

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