Hafler trans-nova P1000, Installation And Operation Manual

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AMPLIFIER MODULE REPLACEMENT
The amplifier modules have been designed to eliminate the need for a special workplace if a field exchange becomes
necessary. All wire connections are made with quick connect terminals so soldering is not necessary. The following
tools are needed to disassemble the amplifier:
Allen wrench, 9/64
Phillips screwdriver, #1 tip
Thin nose pliers
WARNING: Only a competent technician should attempt the following procedure.
1. Disconnect the power to the amplifier before proceeding
2. Locate the 9/64 Allen head screws on the top edge of the amplifier between the heatsink fins. Remove these and
the Phillips head screws holding the input jacks on the rear panel. Lift the rear of the cover and remove it from the
amplifier. Take the knobs off the level controls.
3. Remove the 9/64 Allen screw located behind the rack ears and the two 9/64 screws on the bottom edge of the
heatsink. This frees the module from the chassis and it can be lifted clear.
4. Unplug the gray Mono cable connecting the two modules. Disconnect the red and black output wires and the orange
transformer secondary wires from the PC board.
5. Prepare a new Channel 1 module for installation by setting the NORMAL/Bridged MONO switch to the default
position according to the arrow marked on the PC board. Prepare a Channel 2 module by duplicating the switch
setting of the module which was removed.
6. Install the new module and check the position and alignment of the LEDs. Replace the level control knob and check
its alignment while securing the module.
7. After the module is secured, reconnect the wires according to the following chart:
Wire Color Function Terminal
Red Audio Output RED
Black Output Ground BLK
Orange/White Transformer Center Tap CT1
Short Orange Transformer Secondary AC1
Long Orange Transformer Secondary AC2