Qsc - Uf3Man 电路图.pdf

《Qsc - Uf3Man 电路图.pdf》由会员分享，可在线阅读，更多相关《Qsc - Uf3Man 电路图.pdf（14页珍藏版）》请在收音机爱好者资料库上搜索。

1、11 UF-3UF-3UF-3UF-3UF-3 UniversalUniversalUniversalUniversalUniversal FilterFilterFilterFilterFilter *TD-004031-00* *TD-004031-00* Rev. A Owners Manual RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 1 I. DESCRIPTION The UF-3 is an embedded dual-channel universal filter accessory for use with select

2、 QSC power amplifiers. Compatible amplifier models and lines, both current and discontinued, include: All PLX, two-channel CX, and two-channel DCA models (with a BSC-3 or BSC-5 BusCard installed) All four-channel CX and DCA models (with a BSC-7 BusCard installed) PowerLight models PL 1.0, PL 1.0HV,

3、PL 1.4, PL 1.5X, PL 1.6HVX, PL 1.8, and PL 2.0HV (with a BSC-2 or BSC-4 BusCard installed) PowerLight models PL 3.4, PL 3.8X, and PL 4.0 (with a BSC-6 BusCard installed) All MXa models (MX 1000a, MX 1500a, MX 2000a, and MX 3000a; Note: does not include MX 700), which use Level 1 Open Input Architect

4、ure All EX models (EX 800, EX 1250, EX 2500, and EX 4000), which use Level 2 Open Input Architecture Legacy CX models CX6, CX6T, CX12, and CX12T, which use Level 1 Open Input Architecture Using the UF-3 as a default crossover or EQ is ideal for rental sound systems, since it virtually eliminates the

5、 possibility of unauthorized tampering with settings or other such user errors. Physically, the UF-3 is a small circuit card that mounts inside the amplifier. Older amplifier models that use Open Input Architecture have a two- section row of 22 solder holes called a “Mini Slot” on their input boards

6、. This is where the UF-3 is installed. The input board is part of the removeable input module, so the UF-3 can be installed without opening the amplifier chassis or even without removing the amplifier from an equipment rack. The UF-3 performs the same functions as the older UF-2 accessory does, but

7、on a smaller, more compact circuit board that can fit in more amplifier models, such as the PowerLight 3.4, 3.8X, or 4.0. To fit in these models, the circuit board has a pre-scored breakaway section. Newer models such as the PowerLight, PLX, DCA and CX series require the installation of an appropria

8、te BusCard in order to provide a slot for the UF-3. Depending on the amplifier model, a BusCard can provide as many as four slots for accessory cards. Each slot is equivalent to the “Mini Slot” of the older amplifiers Open Input Architecture. For ease of installation, it is best to mount the UF-3 to

9、 the BusCard before installing the BusCard itself inside the amplifier. The installation process involves soldering, so only qualified technical persons should attempt to install the UF-3; ideally, you should enlist QSCs Technical Services department or an authorized service center to perform the ta

10、sk. The installation section of this manual offers more information about installing the UF-3. II. FEATURES The UF-3 allows independent filtering of the two audio channels. You can select high-pass, low-pass, or bandpass filtering, as well as the frequencies of the filtering. Either channels circuit

11、ry contains electronically balanced input circuitry and bypassable low-pass and high-pass circuitry. Each filter circuit has a four-pole (24 dB/ octave) Linkwitz-Riley alignment. Figure 1 shows a block dia- gram of the UF-3. UF-3 UNIVERSAL FILTER (+) Input (-) Input Input Differential Amplifier Prog

12、rammable Linkwitz-Riley Low-Pass Filter Optional CD Horn Boost Programmable Linkwitz-Riley High-Pass Filter Low-Pass Filter BypassHigh-Pass Filter Bypass Channel Output 3-pin jumper block 3-pin jumper block 1 2 3 1 2 3 Figure 1Block diagram of UF-3 (1 of 2 channels shown) 2 III. PROGRAMMING THE UF-3

13、 The UF-3 circuit board has six 3-pin headers and four SIP resistor network sockets (see Figure 2). All are used for programming the module. The circuitry for the two channels is identical, so the headers and sockets are divided between them: those designated by a three-digit number starting in a “1

14、” (headers J101, J102, and J103; and SIP resistor network sockets RN102 and RN104) are for Channel 1, while those with a three-digit number starting in a “2” are for Channel 2. The following instructions will use an “x” in place of the first digit, except where a specific channel reference is necess

15、ary. Notes on Stereo, Bridged, or Parallel Operation Except for specialized bi-amp models such as the PowerLight 1.5X, 1.6HVX, or 3.8X, the amplifier in which the UF-3 is installed has a switch for setting the operating mode of the amplifier, i.e., stereo, parallel mono, or bridged mono. In the sign

16、al flow, the UF-3 accessory is located after the switch, so you must configure both channels of the UF-3 accordingly, whatever the operating mode. Usually you would use identical settings on both channels in stereo or parallel mode, depending on the application. If the amplifier is in bridged mode,

17、bypass Channel 2 of the UF-3 and use the Channel 1 input and processing only. Bypassing the Filtering To completely bypass the filtering circuitry of a channel, set the jumpers on both Jx01 and Jx02 across pins 1 and 2, which are the upper two pins on their headers (see Figure 3). Note: If you negle

18、ct to place jumpers on either header, no signal will pass on that channel. RN102 ( of low-pass filter)f RN104 ( of high-pass filter)f RN204 ( of low-pass filter)f RN202 ( of high-pass filter)f (low-pass bypass/enable)J101J102(high-pass bypass/enable) J103(CD horn EQ) (low-pass bypass/enable)J202J201

19、(high-pass bypass/enable) (CD horn EQ)J203 1 2 3 1 2 3 1 2 3 1 2 3 Channel 1Channel 2 1 2 3 1 2 3 Pins 1 use the table at left. If there is a resistor network already installed in the socket, carefully pull it straight out. Insert the pins of the new resistor network into the socket holes and carefu

20、lly press the network into the socket. Be careful to avoid bending the pins of the resistor network. Orientation of the resistor network is unimportant, as long as all eight pins are well seated in the socket. Figure 2UF-3 Circuit board jumper and resistor network locations Figure 3Jumper positions

21、3 Programming the High-Pass Filter and CD Horn Equalization To use either the high-pass filter or the constant-directivity horn equalization, or both, set the jumper on Jx02 across pins 2 and 3, which are the lower two pins on their header. If, however, you do not wish to use either one and want to

22、bypass them instead, set the jumper across pins 1 and 2. To set the corner frequency (at which the output is 6 dB down) of the high-pass filter, choose the appropriate value for RNx04; use the table at right. If there is a resistor network already installed in the socket, carefully pull it straight

23、out. Insert the pins of the new resistor network into the socket holes and carefully press the network into the socket. Be careful to avoid bending the pins of the resistor network. Orientation of the resistor network is unimportant, as long as all eight pins are well seated in the socket. In additi

24、on to enabling the high-pass filter at Jx02, if you opt for CD horn equalization you must place a jumper at Jx03 as well. The UF-3 offers two equalization curves for CD horn correction: one with +6 dB of boost at 20 kHz (place the jumper across pins 1 and 2 of Jx03), and one with +10 dB of boost at

25、20 kHz (place the jumper across pins 2 and 3). If you do not place a jumper in one position or the other, the CD horn equalization circuit will be inactive. The table below is a summary of jumper settings for the UF-3; similar information is printed on the breakaway section of the UF-3s circuit boar

26、d. Figure 4 shows how to identify the SIP resistor values. ycneuqer F ) zH( ro t s i serPIS eu l avkrowt en 02K021 03K28 04K65 05K74 08K72 001K22 021K02 051K51 002K21 003K2 . 8 004K6 . 5 005K7 . 4 008K7 . 2 0001K2 . 2 0021K0 . 2 0051K5 . 1 0002K2 . 1 0004065 0005074 0008072 2 HP 20 Hz Bypassed UF-3:

27、 Subwoofer Ch. 1: Ch. 2 LP 1000 Hz; HP 150 Hz LP 1000 Hz; HP 150 Hz UF-3:Woofers Ch. 1: Ch. 2 LP 5 kHz; HP 1000 Hz LP 20 kHz; HP 5 kHz UF-3: Mids this can prevent tampering by unauthorized users. Figure 10Multiple amplifiers with UF-3s, set up for 4-way crossover operation 8 Tools and materials you

28、will need: Soldering iron Desoldering iron or other suitable desoldering equipment Phillips screwdriver Wire cutters Rosin-core solder CAUTION: Do not use desoldering braid because it may damage the solder pads on the BusCard or input board, and it also might not adequately remove solder. The UF-3 c

29、ontains active components which can be damaged by electrostatic discharge (ESD). Be sure to practice standard ESD precautions and always ground yourself and your workstation before handling exposed circuit cards. Preparing the input board for installation of the UF-3 involves removing solder from fe

30、ed-through holes on a two-sided circuit card. Excessive heat can easily damage the solder pads you will be working on. Proper equipment and experience with desoldering delicate PC board circuitry is essential to successfully perform the following procedure. Please contact the QSC Technical Services

31、Group if you feel you might not be qualified to perform the installation yourself. One last warning: damage caused by an improper installation will void the warranty. Installing the UF-3 on a BusCard It is easier to configure and install the UF-3 Universal Filter with the BusCard removed from (or no

32、t yet installed in) the amplifier. Turn off the amplifier and unplug it from the AC. Allow about 10 minutes or longer for the internal voltages to bleed down before you open the amplifier chassis. If the UF-3 is to be installed on a BSC-6 BusCard (for the PowerLight 3.4, 3.8X, or 4.0), snap off the

33、breakaway section of the UF-3 circuit board by flexing it at the pre-scored line. Make sure you insert the UF-3 card on the correct side of the BusCard. Insert the UF-3 fully into the holes on the BusCard. Solder all 22 pins to the BusCard; make sure you dont create any solder bridges. Then install

34、the BusCard in the amplifier; see the BusCard instructions for details. Installing the UF-3 on an input card Turn off the amplifier and unplug it from the AC. Allow about 10 minutes or longer for the internal voltages to bleed down before you open the amplifier chassis. Disconnect all cables from th

35、e amplifiers input panel. Position the amplifier so the rear of the chassis is facing you. The input panel is located on the left side of the rear panel. See Figure 11. Begin the installation by locating and removing the screws securing both the upper blank and lower input panels to the rear side of

36、 the chassis (two screws on each mini panel). The upper blank panel will simply drop off when its screws are removed. Gently pull the lower input panel out from the amplifier. Once it is removed, you will notice a ribbon cable connecting the input PC board to the amplifier. Disengage the locking win

37、g clamps on the ribbon header and carefully remove the ribbon head from the socket on the board. Now the input panel assembly is completely free from the amplifier. Next, desolder and remove the wire jumper pairs W305/W306 and W405/W406 (W303/W304 and W403/W404 on MXa Series amplifiers). Under where

38、 the jumpers were are two rows of solder pad holes, one with 10 holes and another with 12. These make up the “Mini-Slot,” in which the UF-3 mounts. See Figure 12. CH1 CH2 CH1 CH2 BRIDGE MONO BRIDGE MONO LOW IMPEDANCE LOW IMPEDANCE DIR. OUTPUT DIR. OUTPUT ISOL.OUTPUT ISOL.OUTPUT AUDIO TRANSFORMER AUD

39、IO TRANSFORMER 70V 70V 25V 25V 100V 100V 070100 070100 00 -dB-dB 1010 88 66 44 22 24 24 1818 1414 STEREO 1212 CH2 INPUT CH1 CH2 CH1 PARALLEL BRIDGELEVELLEVEL GROUND INPUT Input card Figure 11Location of the input card 9 Continue preparing the PC board by removing solder from all 22 in-line socket ho

40、les. Once this is done, you are ready to install the UF-3. With the input panel facing you and the component side of the UF-3 board facing away from you, carefully insert the header pins of the UF-3 fully into the socket holes. Turn the assembly over and solder the UF-3 in place. Make sure all the h

41、eader pins are well soldered. Visually inspect for cold solder joints and verify that you have sufficient clearance to re-install the ribbon connector on the top side of the assembly. Finish by trimming the UF-3 header pins as required. Reconnect the ribbon cable to the input board connector. Press

42、the locking clamp wings of the connector closed. You will feel them snap onto place. If you need to make any adjustments to the UF-3 settings or if you need to record them, do so now, because the UF-3 will be inaccessible once the input panel is re-installed into the amplifier chassis. Carefully rep

43、osition the input board/UF-3 assembly into the amplifier chassis and secure it by fastening the two mounting screws. Make sure the screws are tightened snugly, but do not over-torque them. Re-install the upper blank panel. Installation of the UF-3 is now complete, and the amplifier is ready to be re

44、installed into the system. VI. WARRANTY AND DISCLAIMERS Disclaimer QSC Audio Products, Inc. is not liable for any damage to speakers, amplifiers, or any other equipment that is caused by negligence or improper installation and/or use of the UF-3. Product Warranty QSC Audio Products, Inc. guarantees

45、the UF-3 to be free from defective material and/or workmanship for a period of three years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs under normal installation and useprovided the unit is returned to our factory v

46、ia prepaid transportation with proof of purchase (sales receipt). This warranty provides that examination of the returned product must disclose, in our judgment, a manufacturing defect. This warranty does not extend to any product which has been subject to misuse, neglect, accident, improper install

47、ation, or on which the date code has been removed or defaced. Figure 12The legacy CX (left) and EX Series (right) input cards 10 VII. TECHNICAL ASSISTANCE & SERVICE Servicing your QSC product requires a trained and qualified technician. There are no user serviceable components inside, and the danger

48、 of electric shock exists. Additionally, some of the components are QSC-specific parts that require QSC replacements. Comprehensive service manuals for most models are available from QSC. Technical Assistance If you suspect that your UF-3 is defective, check your system configuration and UF-3 settin

49、gs to determine the origin of the problem. Incorrect audio interfacing, poor cabling, or other system-level impairments are the leading causes of problems in audio systems. For technical assistance beyond the information given in this manual, contact QSC Technical Services. Factory Service If your UF-3 needs factory service, contact QSC Technical Services for instructions and a Return Authorization (RA) number. QSC cannot be held responsible for products that are returned without a Return Authorization