Tascam M-300 Series Mixer Service Manual 电路图.pdf

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1、TASCAM TEAC Professional Division - Series Mixing Consoles ( OPERATION/MAINTENANCE ) 5700064400 RadioFans.CN 收音机爱 好者资料库 2 CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, 00 NOT REMOVE COVER lOR BACK). NO USER-SERVICE ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The lightning fla

2、sh with arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsuated dangerous voltage within the products enclosure, that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an squilateral tri

3、angle is intended to alert the user of the presence of important operating and mainte nance (servicing) instructions in the literature accompanying the appliance. RadioFans.CN 收音机爱 好者资料库 The guarantee of perfollllince that we provide for the 300 Series Mixen must have several restrictions. We ay tha

4、t the 300 Series Mixen will perform properly only if they are adjusted properly and the guarantee is that such adjust ment is possible. However, we cannot guarantee your skill in adjustment or your technical com prehension of this manual. Therefore, setup is not covered by the Warranty. If your atte

5、mpts at internal adjustment are unsuccessful, we must make a service charge to correct your mistakes. Recording is an art as well as a science. A suc cessful recording is often judged primarily on the quality of sound as art, and we obviously cannot guarantee that. A company that makes paint and bru

6、shes for artists cannot ay that the paintings made with their products will be well received critically. The art is the province of the artist. T ASCAM can make no guarantee that the 300 Series Mixe by themselves will assure the quality of the recordings you make. Your skill as a technician and your

7、 abilities as an artist will be significant facto in the results you achieve. This unit has a serial number loc:atl!d on the rear panel. Pase record the model number and serl number and retain them for your records. Model Numbe-1 Serial Number WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE

8、THIS APPLIANCE TO RAIN OR MOISTURE. TABLE OF CONTENTS INTRODUCTION. . . . . . . . . . . . . . . . 9 Systems Introduction . 11 FEATURES AND FUNCTIONS Input Channel Section 1. MIC INput Connector . 14 2. LINE INput . . 14 3. TAPE or RETURN INput Channels 1-SOnly . 14 4. LINE Switch . 14 5. Pad Switch

9、. 14 6. TRIM . 14 7. EQualizer . . . . . . . . . . . . 15 8. EO ON Switch . 15 9, 10. AUXiliary 1 i H 3 t6 3, ;:,q L t II I I i_f) TASCAM E.;:ii 8 r:io. . . C:ir;:l . qq H iii1/6 P 41 4l l R FUNCTIONAL SEQUENCE (M-312/M-320) Ill INSERTion C) TAPE IN 1 SUB IN .,.sTEREO lo f!:=-=:-=:=: 1 Master !RTion

10、 EO lv EXT1 EXT 2 j MONO EFFECT , AUX 1 ux 2 IIX3 R PGM Busset STEREO au . STEREO OUT L +4 dBm -10dBV (K2) STEREO OUT R +4dBm -10d8V (x2) MONO OUT T4d8m OdBu MONitor OUTPUT L OdBu -10dBV (II MONitor OUTPUT R :=:=:s;: 0 dBu - -10dBV Headphones G) SOLO OUTPUT * -10dBV FUNCTIONAL SEQUENCE (M-308) SUB I

11、N Gl EXT SOLO SOLO Buss : =t?- Fllndicator t!ftJ SOLO Bun =!t/ laster L ion /1 EXT 1 r EXT 2 MONO EFFECT X 1 12 A PGM Busses STEREO Busses PGM OUT 1 Understanding whats going on inside your equipment will help improve your sound. This manual as a reference book. You may not need to know all of what

12、is here to begin, and it is certainly not necessary to memorize it, but do try to find the time to read it thoroughly at least once. That way you will be familiar with the contents and, if you need answers to any questions or solutions to problems, you will know where to turn. Good luck with your so

13、und! INTRODUCTION The T ASCAM 300 Series Mixers were designet for maximum flexibility without compromisin! performance in any way. They are equipped with a very flexible comb ina tion of features and functions so they can be sue cessfully used in an extremely broad range o applications from small st

14、udio recording, tt mixing for live sound reinforcement, to audit broadcast production, and video sweetening. A mixers value and usefullness can be determine( by its flexibility. The more flexible a mixer, tht greater its value to you. This flexibility however may make the mixer difficult to understa

15、nd a: first. With study and experience, you will fim the 300 Series readily understandable, eas) to use, and very flexible. To understand the full capabilities of the 30( Series Mixers, it is important to realize the 30( Series are mixer systems comprised of multipll submix systems. These submix sys

16、tems an designed to perform specific functions whid allow the 300 Series to adapt to many differen1 applications. These subsystems are: The MAl MIX, the AUX 1 SUBMIX, the AUX 2 SUB MIX the EFFECT SUBMIX, the EFFECTS RETUR SUBMIX, and the MONITOR SUBMIX. On thE models 312 and 320, the MONITOR SUBMI)

17、contains two (2) additional submix systems AUX 3 and AUX 4. Each of these subsystems performs the samE basic function: it takes signals in through it input, processes them, and sends them ou1 through its outputs. The processes perform!( involve gain control and routing -in simple1 terms, where (both

18、 where from and when to) and how much. Every control found or the top panel, regardless of its specific label o system membership, performs one or both o these functions. Keeping this in mind may helt overcome the inevitable intimidation caused bl the apparent sea of knobs presented by you1 mixer. T

19、hese three illustrations will help you to under stand the submix systems. The first is an illustra tion of the top panel controls. The second i: a pictogram; this shows the controls laid ou according to how they are wired (their Func tiona/ sequence). Note that the functiona sequence is not the same

20、 as how the controls an 1 oo J + 1 Ll. . l!)l.: : . f) 4D mill! -t:;_ _ _ .: _ _ l _ - _ :-Lr:m . :;-t physically laid out. Also keep in mind that each symbol in the pictogram represents either a where or how much point, or, in the case of the PAN control, a where AND how much point. The third illus

21、tration, a simplified electrical sequence called a B LOCK DIAGRAM, is the same thing as the second illustration, except it offers a little more detail and uses different symbols. Using the numbers on these illustrations, you can see how a control knob on the first drawing relates to a function on th

22、e second drawing, and a symbol on the third. Studying these relationships will help you learn to read the BLOCK DIAG RAM. This is a valu able skill which will aid you in getting the most performance from your 300 Series Mixer. Ex perienced engineers can operate a sophisticated mixing console bv usin

23、g only the block diagram. 10 SYSTEMS INTRODUCTION This manual presumes nothing about your past experience with the multi-channel process except a willingness to learn. An expert in the field might see the significance of a control or jack with just a simple statement of its location, but in this man

24、ual we will point out the obvious. There are numerous basic signal input connectors on the M-308, M-312, and M-320 mixers, as shown on this chart: TV Co M-308 M-312 M-320 MICXLR) INPUT 8 12 20 LINE 1/4) INPUT 8 12 20 MUL TI.PURPOSE TAPE 8 8 8 RETURN INPUTS EFFECT RETURN INPUTS 2 2 2 MULTI-PURPOSE 9

25、11 11 BUSS INPUTS =- Each specific feature and function is explained in the FEATURES AND FUNCTIONS section. Whenever possible, an explanation of when a specific control would be used will be given. Main Mix System The MAIN MIX system is the most complex of the submix systems. It is capable of accept

26、ing a number of different types of signals and pro cessing them for a wide variety of applications. This is the primary mixing system. It is used to mix signal sources such as mics or tape playback, and route them to the PROGRAM (PGM) GROUPS and STEREO LEFT and RIGHT BUSSES. These busses can be used

27、 to provide signals to tape recorders, P.A. amplification systems, video recorder or any other sound system. The EQ UALIZER (EO) network resides in the input channel section of the MAIN MIX system and is selectable. Since other subsystems may derive their input from the channel, either PRE (before)

28、or POST (after) the EO section, it is important to understand the various inter relationships of the multiple subsystems. In some cases, the where or how much of one subsystem may greatly affect the signal sent to another. 11 Each channel has either two or three input sources from which it may recei

29、ve its input. As we will see later, each source can be used independently of the others, allowing the 300 Series to accept and mix multiple signals. For now, the input source (dont worry about what type of signal it is or where it comes from) will proceed through the channel strip. After processing,

30、 the signal is assigned to a BUSS or BUSSES. These may be the PGM GROUPS (1-4) or the STEREO LEFT and RIGHT or a combination of both, depending on the applica tion. Multiple signals from the channels can be mixed together either in the PGM GROUPS or in the STEREO MASTERS, resulting in the finished m

31、ix. Auxiliary and Effects Submix Systems On the channel strips are three controls marked AUX 1, AUX 2 and EFF(ects). These represent three separate submix systems, all of which can perform various tasks. Think of these three sub systems as additional mixers; their respective titles are for identific

32、ation purposes. These are handy for performing mixing duties separately from the MAIN MIX, although, in some cases, they derive their input from the channel itself. The AUX 1 SUBMIX system derives its signals from either the channel strip in which it resides or from the corresponding LINE INput con

33、nector. On the first eight inputs, if the LINE INput is not used, the corresponding TAPE IN jack is automatically connected to the LINE IN put circuit. The AUX 1 input source is de termined by the Ll N E switch located next to the AU X 1 control. This determines whether the AUX 1 system input is tak

34、en from the LINE IN put connector or from the channel. The AUX systems are independent of the channel or main mix system. Their input source choices are the same, but their actual source selection may be different. If the channel signal is selected, the signal is taken post (after) the EO. If LINE i

35、s chosen, the Ll N E INput signal is sent to the AUX 1 control, bypassing the channel controls, even if the same signal is selected to the channel. Once sent to the AUX 1 BUSS, the signal is combined with any other AUX 1 signals. This composite signal is then controlled by the AUX 1 MASTER and sent

36、to the AUX 1 OUTPUTs. The AUX 2 submix system is similar to the preceeding system, but offers a slightly different signal source choice. The AUX 2 signal input is determined by the POST switch. In the up position (PRE), the signal is the same as that selected for AUX 1, regardless of the AUX 1 choic

37、e. In the POST or down position, the AUX 2 system receives its signal from the chan nel post EO and FADER. Thus, AUX 2 can be different from AUX 1 or the same, depending on the selection of the sources. As with AUX 1 the AUX 2 signals are summed and controlled by the AUX 2 MASTER controL The final s

38、ignal mix is available at the AUX 2 OUTPUTs. The next subm ix system is the E F F ( E CTs) send system. Unlike the AUX 1 and 2 systems, the EFF(ECTs) system is dedicated; its signal source is always the channel. The signal is taken post fader, so whatever EO and channel fader changes are applied to

39、the channel signal will be apparent in the EFF(ECTs) signal as well. The composite EFF(ECTs) signal from all the selected send con trols are sent through the EFFECTs BUSS to the EFFECTs MASTER control and on to the EFFECTs output jacks. Effects Return System The EFFECTs RETURN subsystem should be vi

40、ewed as a pair of separate or extra line inputs. The specific reason for their inclusion is to allow signals sent from the EFFECTs send outputs to be modified by the chosen external device, then brought back to the MAIN MIX system. The EFFECTs RETURNs receive their signals from the EFFECTs RETURN in

41、puts. Each of the jacks feeds signal to a separate L EVEL controL From here, the signals are distributed through the PAN controls and sent to the STEREO LEFT and RIGHT BUSSES. The EFFECTs R ETURN system is dedicated; its signals always go to the MAIN MIX STE REO LEFT and RIGHT BUSSES. Monitor System

42、 The MONITOR submix system is an independent 8 input/2 output mixing system which can receive its inputs from either the PGM GROUPS or the TAPE R ETURNS or a combination of the two. The MON ITOR system is a necessary sub- 12 system for multi-track recording as it allows various signals to be heard o

43、r monitored during the actual recording process. Since these signals can be live, prerecorded or in combination, the engineer can use the MONITOR to aid in making critical artistic decisions regarding the final mix. rhere are two horizontal rows of four MONITOR sections located above the PGM GROUP F

44、ADERS , eac h GROUP contains two MONt TOR sections. The upper row contains sections 1, 2, 3 and 4, while the lower row, sections 5, 6, 7, and 8. Each section consists of a TAPE RTN(/source) switch, a L EVEL control, a PAN control, and an ON switch. The TAPE RTN switch determines the signal sou rce o

45、f the individual MONITOR section; either the corresponding TAPE RE TUR N input or the PGM GROUP in which the section resides. The L EVEL and PAN controls are used to set the signal level and distribution of the signal which is sent to the STEREO LEFT and R IGHT BUSSES. The ON switch allows the MONIT

46、OR output to be muted, stopping the signal from reaching the MAIN MIX. Additionally, on the models M-312 and M-320, each MONITOR section contains an AUX send control and an AUX POST switch. In the upper row, MONITORS 1 -4, the controls are labeled AUX 3, while the lower row, sections 5- 8, contains

47、AUX 4. Each is independent, sending signal to either AUX MASTER. 3 or 4. The POST switch determines whether the AUX signal is derived before or after the MON ITOR LEVEL controL If POST is chosen, the MONI TOR ON switch will affect the AUX signal as well. These AUX systems allow the MONITOR mix to be

48、 utilized independently from the MAIN MIX. For example, a previously recorded signal could be added to new signals through the TAPE INput and the proper MONITOR section. Additionally, the same signal could be sent from the MONITOR through the AUX 3 or 4 system to an external effects device. This modified or wet signal could then be brought back to the MAIN MIX via the EFFECTS R ETURN system. The two signals could be compared and blended, if desired. to create the proper sound quality. Because of thi