Hafler DH-200 Instructions For Assembly And Operation Manual
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Hafler DH-200 Instructions For Assembly And Operation Manual

Hafler power amplifier instructions for operation and kit assembly dh-200
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THE

POWER AMPLIFIER

CAUTION:
IF THE SPEAKER FUSES BLOW,
SOME DISTORTED SOUND CAN BE
HEARD. THEREFORE
MALFUNCTIONS, ALWAYS CHECK
FOR BLOWN FUSES FIRST.
THE DAVID HAFLER COMPANY
5910 Crescent Boulevard, Pennsauken, New Jersey 08109
INSTRUCTIONS
for OPERATION
and KIT ASSEMBLY
IF AMPLIFIER
serial
number in all
communications

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Summary of Contents for Hafler DH-200

  • Page 1: Power Amplifier

    IF THE SPEAKER FUSES BLOW, SOME DISTORTED SOUND CAN BE HEARD. THEREFORE IF AMPLIFIER MALFUNCTIONS, ALWAYS CHECK FOR BLOWN FUSES FIRST. THE DAVID HAFLER COMPANY 5910 Crescent Boulevard, Pennsauken, New Jersey 08109 INSTRUCTIONS for OPERATION serial Hafler DH-200 Power Amplifier number in all communications...

  • Page 2: Table Of Contents

    Hafler tradition of using the very latest technology to provide outstanding value. The DH-220 circuit is a refinement of the DH-200 design, a Hafler landmark which has achieved worldwide recognition, and has elicited glowing reviews since its 1979 introduction. As...

  • Page 3: Installation

    DH-220 applications, since its power may be controlled by the AC switching of most audio preamplifiers, like the Hafler DH-110. If your control unit does not provide switching capacity sufficient for the amplifier’ s 7 amp needs (plus other equipment it is also switching), you should use the amplifier’...

  • Page 4: Assembly Instructions

    performance. Special low capacitance cables enable even greater distance between preamp and amplifier. It is desirable to keep the left and right input cables close together throughout their length to minimize the likelihood of hum pickup. Also, you should avoid running them parallel to AC cords - these should be crossed at right angles.
  • Page 5 A soldering “gun” is not recommended. The unfamiliar user is more likely to damage the etched circuit boards with its higher heat potential and unbalanced weight. Also, because he may not wait long enough for it to reach operating temperature each time it is switched on, poor solder connections are more likely.

  • Page 6: Wiring The Kit

    Wiring the Kit If any components are unfamiliar to you, checking the pic- torial diagram should quickly identify them. Or, the quantities, and the process of elimination as you check the parts list, will help. The pictorial diagram is necessarily distorted to some ex- tent for clarity, so that you can trace every wire in a single overall view for verification as you work.
  • Page 7 5 n Select the two round fuse holders, and two each 1/2” rub- ber washers, lockwashers and nuts. First install the rub- ber washer on the holder, so it will be outside the chassis, and then fasten the fuse holders at LF and RF, with the tip lugs pointing towards each other, toward the center of the chassis.
  • Page 8 19 c3 Prepare a 7” green wire. Connect one end to terminal LB. (S-2). Place this wire towards the center of the chassis. 20 Ll Prepare a 10” white wire and a 10” green wire. Starting with the white wire 3/4" longer, twist them together. Con- nect the projecting white wire to red terminal RR.
  • Page 9 The transformer leads may be trimmed as desired for a neat job, but be sure you do not cut any of them too short (particularly if yours is the multi-voltage version, and any change to a different supply voltage is likely). Cutting the leads too short for re-use may void its warranty, if it is thought to be defective.

  • Page 10: If Problems Arise

    55 I Select the white pair of wires at the front of the chassis. Tuck the excess-wire into the corner and connect one wire to each of the lugs on the thermal breaker. Solder each. 56 [ Select the left output module, check it as before to see that underside connections near the holes are secure, and that the holes are visible.

  • Page 11: Service Policy And Limited Warranty

    In spite of all this testing,shipping damage does occur, kits are not assembled properly or someone “goofs” and service and/or maintenance will be required. The David Hafler Co. provides complete service facilities at the factory to make any necessary repairs.

  • Page 12: Ac Line Connections For Overseas Use

    The power transformer supplied in DH-220 amplifiers sold in the lJSA is intended for 120 volt, 60 Hz operation only. For use in other countries, a multi-voltage transformer is available at higher cost. It has dual tapped primary windings which can be arranged in various series-parallel combinations for 100, 110, 120, 200, 220 and 240 volt 50 or 60 cycle AC mains.

  • Page 13: Kit Parts List

    KIT PARTS LIST KIT PARTS LIST Minor variations may sometimes be encountered in value or appearance. These will not affect performance. Chassis Cover Capacitor. 10,000 mfd, 75V Bracket, round, for capacitor Diode rectifier block Feet, rubber Fuse holder, round Fuse clip, single Fuse clip, dual Input socket Line cord, with plug...

  • Page 15: Component Value Listing

    All resistors are l/4 w carbon film unless specified otherwise 470,000 ohms 1,800 ohms 47,000 ohms 47,000 ohms 1,000 ohms 1,000 ohms 47,000 ohms 560 ohms 560 ohms 1,800 ohms 1,800 ohms 270 ohms 47 ohms 47 ohms 47 ohms 47 ohms 1,800 ohms 1,800 ohms...

  • Page 16: Specifications

    Power Rating: Less than 0.02% total harmonic distortion at any power level up to 115 watts continuous average power per channel into 8 ohms at any frequency between 20 Hz and 20 kHz with both channels driven. IM Distortion ( S M P T E ) : Less than O.OOS’%, from 1 watt to 1 15 watts into 8 ohms.

  • Page 20: Limited Warranty

    THE HAFLER The DH-222 may be installed in a Hafler DH-220 power amplifier to enable easy conversion to a high power monophonic amplifier, bridging the two conventional chan- nels to a single floating output which can deliver in excess of 400 watts into an 8 ohm load.
  • Page 21 The switch lever should be placed in the upper position for monophonic operation. In the lower switch position, the amplifier functions as a conventional stereo amplifier. Rein- stall the amplifier cover with the remaining 8 screws.

This manual is also suitable for:

Dh-220Xono

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