HaflerメーカーDH-110の使用説明書/サービス説明書
ページ先へ移動 of 24
THE PREAMPLIFIER DH-110 INSTRUCTIONS for ASSEMBLY and OPERATION LM132 $3.00 Please refer to this serial number in all communications regarding this equipment.
SPECIFICATIONS The numbers in parentheses refer to the paragraph in the IHF specifications manual which defines the test procedure. 2 PHONO PREAMP SECTION Rated Output: 3 Wms, 8 Hz-105 kHz Maximum Output (3.5): 12 Vrms, 20 Hz-20 kHz at recording output Total Harmonic Distortion: Less than 0.
INTRODUCTION Your preamplifier is the control center of your music system, acting as an interface between the sound sources-record players, tape recorders, FM and Video tuners-and the power amplifier which drives the loudspeakers. As the focal point of your system, it should be attractive and easy to use, versatile and yet functionally unobtrusive.
The DH-110 is provided with accessory Rack Mount end caps in addition to the standard end caps installed on the unit. These accessory caps extend the width of the front panel to that of a standard 19” rack, with appropriate mounting holes. Installation instructions are detailed later in this manual under Additional Information.
fects that can result from unpowered electronic circuits in the tape decks when they are connected to the Recording Outputs, it is recommended that tape recorders be switched on when the preamplifier is in use. This is a commonly overlooked cause of less-than-ideal preamplifier performance.
The following controls affect all signals which are heard through speakers or headphones. They have no effect on the signals to the recording outputs. MONO SWITCH When this button is IN, left and right channel informa- tion is combined, and the composite signal is fed to both left and right outputs.
There are three basic rules for success in electronic kit building: 1: Read the instructions carefully, and follow them in or- der. 2. Make secure solder connections which are bright and smooth.
Excess solder may be removed from a connection by heat- ing it and allowing the solder to flow onto the iron, which is then wiped on the sponge. ALL SOLDER USED MUST BE ROSIN CORE Never use acid core solder or any separate flux in elec- tronic work. Silver solder is also not suitable.
BUILDING THE KIT Partial mechanical assembly of the kit provides protec- tion for major components during shipment. Most of the hardware thus used is included in the quantities listed in the parts list. The exception is that used to install the rear mounting bracket on the PC-14, as this is considered an in- tegral assembly.
each socket, the board is marked to indicate the side of the hole on which the center mounting tab should be positioned, so that it will be soldered to the widest part of the circuitry on the back side. Leave the phono plug in the socket while bending and soldering is completed.
23 [7 Select the 6 black 5/8" screws, the 6 spacers, and 6 small nuts. Insert the screws from the outside of the back panel at the locations nearer the center of the panel (not in the end holes marked “Grounds”). Install a spacer on each screw and tighten them.
@ 0 RIGHT nn IGHT PHONO LEFT PHON’ i 1.6 , IN 02 13 03 15-1 15T1 I’ 1 I I! ot60” 04 SELECTOR MONITOR TONE r- I I _EPL I 1 1 PHONO M SlA R t+ K s3 FLAT ROUND D13 D14.
HT LINE- aa n “;T No 0109 E 0 - LEFT LINE - -r 0107 (J Q-&xo T c21 - 012 @oE Cl9 I 1 I 1 - Ql- -R44- izJ 141- --R144- 011 0 -D5k 0 Fl v I E 1 co “0 “0 527 (0 Do EO -Ml- +D6- -D7k 0 c34 0 C36.
wire to hole Q, which is between the center lugs of Jll and 512. (S). The wire should not protrude sig- nificantly beyond the front surface of the board to avoid coming in contact with a connector. To assure a good solder connection, bare wire should be visi- ble on the circuit side of the board.
IF A PROBLEM ARISES If neither LED lights when you first turn on the power switch, turn the unit off immediately. Check the fuse. Check the polarity of the LEDs. Check the power transformer wiring for proper connections for your line voltage. Look for a short caused by a stray strand of wire, or for a solder splash on the circuit board.
ADDITIONAL INFORMATION RACK MOUNT END CAP INSTALLATION Every DH-110 is supplied with front panel accessory end caps which adapt it to a standard 19” rack panel, and with a 5/32” Allen wrench which fits the mounting screws. Remove all power and signal connections from the DH- 110.
MINIMIZING NOISE IN THE SYSTEM Your choice of separate components is the right way to secure the best performance from a music system, but the wide-band characteristics and complexity of the best sys- tems may also not conceal the introduction of ground loops and noise pickup-especially RFI (radio frequency interference).
Tape 2 law 1 CD/Video Phono 1 Phono 2 Tuner Record Out EPL Send EPL Roturn PHONO 1 C 2 B C R TONE FILTER EPL Treble Bass SAL VOL v v, 0 0 1 LINE OUTPUTI To Right Channel r-K Switched E Direct FUNCTION.
COMPONENT VALUES All resistors are 1/4 watt I% Metal Film unless otherwise noted. Rii channel corresponding values have designations above 100. RI R2 R3 R4 R.
PC12a CABLE PIN NUMBERS TUNER @j----o N ISELECTOR] ” TAPE 1 EPL SEND (0)“’ I ,T I I I e m-c ‘I I JlO I DIRECT OUTPUT OUTPUT VIA PHONE JACK PHONO 1 PHONO 2 GROUND pos1.
PC13 lYONOl IB*LINCE] l75y7q C29 C30 LINE AMPLIFIER Fcml R49 520 SYMBOLS I3 POWER SUPPLY GROUND m SHIELD GROUND m LEFT , 6 > CHANNEL SIGNAL GROUND m RIGHT 1 o+ 1 o- ; POWER SUPPLY RAILS Q CIRCUIT CARD LAND CHASSIS GROUND -a MALE CONNECTOR PIN -c FEMALE CONNECTOR SLEEVE - SWlTClj CLOCKWISE, DEPRESSED I5 L MUTING + I I .
KIT PARTS LIST Minor variations may sometimes be encountered in value or appearance. These will not affect performance. Some items may have been used to package the kit for shipment.
SERVICE POLICY AND LIMITED WARRANTY Your DH-110 Preamplifier has been carefully engineered to provide many years of use without maintenance or ser- vice. Factory assembled units undergo many physical and electrical tests before shipment. The circuit board in kits is similarly tested to meet all primary specifications before it is packed.
Printed in USA.
デバイスHafler DH-110の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Hafler DH-110をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはHafler DH-110の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Hafler DH-110の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Hafler DH-110で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Hafler DH-110を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はHafler DH-110の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Hafler DH-110に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちHafler DH-110デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
