User manual HAFLER DH-120

[. . . ] As the focal point of your system, it should be attractive and easy to use, versatile and yet functionally unobtrusive. It should contribute a minimum of noise or distortion while providing signal amplification, control of the signal level, and applicable modification of the frequency response. The DH-120 achieves all these objectives with great versatility, providing for two record players with magnetic cartridges, two tape recorders, a tuner, and an additional stereo input for a compact (digital audio) disc player or video audio. It also includes inputs and outputs for an external signal processor such as a graphic equalizer, time delay device, or noise reduction unit. The performance of the DH-120 is exemplary, and its assembly from an array of discrete components of exceptional quality should ensure reliability and longevity of its capabilities. Precise interchannel balance at all frequencies is maintained with close tolerance components, and RIAA phono equalization is engineered to very narrow limits, maintaining accurate phase relationships and correct spatial perspectives, as well as exceptional unit-to-unit consistency. [. . . ] Select the 6 larger nuts and washers for securing the controls to the front sub-panel. The two largest sets are used for the selector switches; the volume control is the smallest size, next to the power switch; the 3 other sets go on the 3 central control shafts. Be sure all the locating lugs on the controls engage the holes in the panel before securing the hardware. The wires from the phone jack go under the board. Push the ends of the wires through the grommet. 8 0 Select the small circuit board assembly PC-13 and two #4 screws. With the circuit board uppermost, position the assembly at the top of the large front panel opening so that the sockets on the board align with the pins from below, and plug the board downward onto the pins. Secure the assembly with screws through the panel. Set the front panel aside, and select the PC-12 circuit board. The front of the board marks the component locations, and "J" designations. Always install them tight against the board, and solder each lead on the back (circuit) side. Then cut off all excess leads. with the front lug), and the #6 lug at the top. 14 0 Select the two right angle 15-pin plugs, and install Then grip the larger portion of the strain relief with the tips of the pliers, squeeze it tightly, and insert the end of the cord and the strain relief through the panel hole from the outside. Note that the hole has a flat on one side, and the strain relief is installed so that the cord is horizontal. This is the most difficult step in the kit. Patience, and a friend's help, if available, will make this job easier. Safety requirements dictate that this be a tight fit. Some persons might find it helpful to bolt on a side piece (with the flanges out) to add rigidity to the back panel, as well as a support to press against the back panel while you squeeze the strain relief and pull the line cord through. The fixture snaps into position when it is fully inserted. Remove the side piece if you attached it. 20 0 Select the power transformer and 2 sets of #6 hardware. Install the transformer next to the line cord so that the leads are in the lower comer below the strain relief. Snap these into the back panel holes from the outside. 22 0 Select the PC-12 circuit board assembly and the 2 flat their shorter pins at locations J22 and J24 at the top of the board, so that the bent pins point toward the upper edge. [. . . ] Nevertheless, shipping damage can occur, or human error may intervene to make service necessary. Because many of the components in this refined design are not readily available, and because substitution of apparently similar parts can easily compromise its performance, we strongly recommend that you make use of our complete factory service facilities, or order exact replacement parts from the factory. It is the owner's responsibility to return the unit, freight prepaid, to the factory service facility. Units shipped freight collect will not be accepted. [. . . ]