Bogen-TBA15-Operation-Manual 电路图 维修手册.pdf

《Bogen-TBA15-Operation-Manual 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Bogen-TBA15-Operation-Manual 电路图 维修手册.pdf（8页珍藏版）》请在收音机爱好者资料库上搜索。

1、 2012 Bogen Communic ations, Inc . All rights reserved. 54-5870-01B 1207 TBA15 Pagi ng/Tal k Back Ampl i f i er Installation and Use Manual RadioFans.CN 收音机爱 好者资料库 Notice Ever y effor t was made to ensur e that the infor mation in this manual was complete and accur ate at the time of pr inting. Howe

2、ver , infor - mation is subject to change. Feder al Communications Commission (FCC) Statement (Par t 68) This equipment is component r egister ed with the Feder al Communi- cations Commission (FCC) in accor dance with Par t 68 of its r ules. I n compliance with the r ules, be advised of the followin

3、g: Register ed equipment may not be used with Coin Telephone Lines. Equipment may be used with Par ty Lines in ar eas wher e state tar iffs per mit such connections and when equipment is adaptable for such ser vice. This equipment is r egister ed as follows: Registr ation Number - US: CD272Q-17147-K

4、X-N Ringer Equivalence - 0.0B I f tr ouble is exper ienced, the equipment should be disconnected fr om the inter face to deter mine if this equipment, or the telephone line, is the tr ouble sour ce. I f the equipment is deter mined to be malfunction- ing, it should not be r econnected until r epair

5、s ar e effected. Repair s to this equipment, other than r outine r epair s, can be made only by the manufactur er or its author ized agents. I f the equipment causes har m to the telephone networ k, the local telephone company may tempor ar ily discontinue your ser vice and, if possible, notify you

6、in advance. I f advance notice is not pr actical, you will be notified as soon as possible. You will be given the oppor - tunity to cor r ect the pr oblem and infor med of your r ight to file a complaint with the FCC. The local telephone company may make changes in its facilities, oper ations, or pr

7、 ocedur es that could affect the pr oper functioning of your equipment. I f they do, you will be given adequate notice in wr iting to allow you an oppor tunity to maintain uninter r upted telephone ser vice. Impor tant Safety Infor mation Always follow these basic safety pr ecautions when installing

8、 and using the system: 1. Read and under stand all instr uctions. 2. Follow all war nings and instr uctions mar ked on the pr oduct. 3. DO NOT block or cover the ventilation slots and openings. They pr event the pr oduct fr om over heating. DO NOT place the pr oduct in a separ ate enclosur e or cabi

9、net, unless pr oper ventilation is pr ovided. 4. Never spill liquid on the pr oduct or dr op objects into the ventilation slots and openings. Doing so may r esult in ser ious damage to the components. 5. Repair or ser vice must be per for med by a factor y author ized r epair facility. 6. The pr odu

10、ct is pr ovided with a UL- CSA appr oved, 3- wir e gr ound type plug. This is a safety featur e. DO NOT defeat the safety pur pose of the gr ounding type plug. DO NOT staple or other wise attach the AC power supply cor d to building sur faces. 7. DO NOT use the pr oduct near water or in a wet or dam

11、p place (such as a wet basement) . 8. DO NOT use extension cor ds. The pr oduct must be installed within 6 feet of a gr ounded outlet r eceptacle. 9. DO NOT install telephone wir ing dur ing a lightning stor m. 10. DO NOT install telephone jacks in a wet location unless the jack is specifically desi

12、gned for wet locations. 11.Never touch uninsulated wir es or ter minals, unless the line has been disconnected at the paging or contr oller inter face. 12. Use caution when installing or modifying paging or contr ol lines. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO PREVENT THE RISK OF EL

13、ECTRIC SHOCK, DO NOT REMOVE ANY FRONT/BACK COVERS OR PANELS. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. The exclamation point within an equilat- er al tr iangle is intended to aler t the user to the pr esence of impor tant oper ating and maintenance (ser vicing) instr

14、uctions. The lightning flash with an ar r owhead symbol, within an equilater al tr iangle, is intended to aler t the user to the pr esence of uninsulated danger ous voltage within the pr oducts enclosur e that may be of sufficient magnitude to constitute a r isk of electr ic shock to per sons. Radio

15、Fans.CN 收音机爱 好者资料库 1 Descr iption The Bogen Model TBA15 is a 15- watt Paging/ Talk Back amplifier which complies with Par t 68 of FCC r ules. The unit per mits two- way communication between a telephone handset, and one or mor e paging zones. The TBA15 senses and automatically switches the dir ectio

16、n of conver sation fr om telephone to loudspeaker without the use of r elays or other moving par ts. Contr ol of speech dir ection is maintained at the telephone handset. Contr ols ar e pr ovided to adjust the switching sensitivity, switching delay, and loudspeaker and talk back (handset) volume lev

17、els. The TBA15 has a talk back fr equency r esponse which has been shaped for maximum intelligibility and backgr ound noise r ejection. Switching delay time is adjustable fr om less than 50ms to gr eater than 0. 5 seconds to ensur e an intelligible flow of conver sation. A “power on” LED, cir cuit b

18、r eaker , and volume contr ol ar e located on the fr ont panel. A r ecess in the panel, pr otected by a r emovable cover , houses the 600- ohm tr ansfor mer - coupled telephone line input, 25V and 70V constant voltage outputs, and muting ter minals (for one- way paging) . Contr ols to adjust sensiti

19、vity, switching delay and talk back volume ar e also located within the panel r ecess. The amplifier oper ates fr om a 120 volt, 60 Hz, AC sour ce. A pr ess- to- r eset cir cuit br eaker pr otects the unit fr om excessive cur r ent flow. Safe Oper ating Ar ea (SOA) and ther mal pr otection safeguar

20、d the output device. The unit is finished in textur ed black enamel and mounts easily on a wall backboar d or in standar d 19” equipment r acks. Installation War ning: To pr event fir e or shock haz ar d, do not expose t his equipment t o r ain or moist ur e. Ther e ar e no user -ser viceabl e par t

21、 s wit hin t his equipment . Removal of t he cover pr esent s an el ect r ical shock haz ar d. Have al l int er nal ser vice per for med by qual ified ser vice per sonnel . Mounting Avoid pr oximity to heat sour ces and str ong magnetic fields. Pr ovide for adequate ventilation for chassis heat diss

22、ipation. To eliminate possible cr osstalk inter fer ence, do not r un input and output lines close together , and r oute thr ough separ ate knockouts on the ter minal str ip cover . For Wall-mounted installation, set the 2 top scr ews 18- 5/ 16” apar t, allowing the scr ew heads to pr otr ude 1/ 8”

23、to 1/ 4”. Fit the chassis onto the scr ew heads at the keyhole slots and position the two bottom scr ews. Complete the installation by tightening all scr ews secur ely. For best suppor t, use self- fastening har dwar e when mounting the unit to plaster boar d or similar thin mater ials. The unit wei

24、ghs 7 pounds. ForRack-mounted installation, install the unit facing into the r ack. A blank panel may be used to cover the exposed r ear sur face of the amplifier . Secur e the unit and blank panel with the same scr ews. Power and Gr ounding The AC line cor d is ter minated in a thr ee- pr ong plug,

25、 which should be plugged into a thr ee- wir e, gr ounded outlet. I t is impor tant to gr ound the amplifier pr oper ly. “Pigtail” adapter s may be used only when pr oper ly connected to a gr ounded outlet. A fr ont panel LED illuminates when power is applied to the unit. Connections All connections

26、to the TBA15 ar e made thr ough a scr ew ter minal str ip, located within a r ecess on the amplifier fr ont panel. Keyhole slots on the r ecess cover allow for quick access to ter minal connections. Knockouts ar e pr ovided on the cover to admit wir ing. Run input and output wir ing thr ough separ a

27、te knockouts. Telephone Line The TEL LI NE ter minals ar e a 600- ohm tr ansfor mer - balanced telephone side connection (dr y signal only, no loop cur r ent) . I n typical applications with a single- paging zone, this line inter faces with a station por t or tr unk por t of an in- house telephone s

28、ystem (via the Bogen Model TAMB2 Telephone Access Module, or other suitable inter face) and is r eached by dialing a number r eser ved for paging. Loudspeaker s The TBA15 pr ovides 25V and 70V constant voltage speaker outputs for balanced systems. Use two- conductor shielded cable with insulation ov

29、er the shield. Connect one conductor to the 25V or 70V ter minal and the other conductor to the COM ter minal. Connect the cable shield to the GND ter minal. The total speaker load should not exceed 15 watts. Mute The TBA15 may be configur ed for unidir ectional (telephone to loudspeaker ) oper atio

30、n, if desir ed, by connecting the +MUTE ter minal to the MUTE ter minal. The +MUTE ter minal is a cur r ent limited (by a 1 kilohm r esistor ) 15 volt supply pr ovided pr imar ily to contr ol the talk back mute featur e; however , it may be used to supply power to auxiliar y equipment (e. g. , TAMB2

31、 exter nal VOX enable) . The MUTE ter minal is the talk back mute contr ol ter minal. The talk back featur e will be defeated if +5V DC or gr eater (r efer enced to the GND ter minal of the TBA15) is applied to this ter minal. RadioFans.CN 收音机爱 好者资料库 Contr ols Output Volume Contr ols the volume at t

32、he loudspeaker . Clockwise r otation of the contr ol incr eases the level; counter clockwise r otation decr eases the level. Talkback Volume Adjusts the talk back volume level in the handset ear piece. Clockwise r otation incr eases the level; counter clockwise r otation decr eases the level. Switch

33、ing Sensitivity Adjusts the point at which the VOX cir cuit will switch fr om talk back to talk modes. Clockwise r otation incr eases sensitivity; counter clockwise r otation decr eases sensitivity. Switching Delay Adjusts the r elease time of the VOX cir cuit, allowing for shor t pauses between wor

34、 ds without causing the unit to switch to the talkback mode in the middle of a sentence. Clockwise r otation incr eases the delay; counter clockwise r otation decr eases delay. Configur ations Remote Pr ivacy: Any r emote speaker may be modified for pr ivacy (see Figur e 2) . When SW1 is open, pagin

35、g announcements fr om the telephone handset ar e r eceived at the loudspeaker , but the telephone oper ator cannot monitor the loudspeaker ar ea. Single Zone Talk Back with TAMB2: A single paging zone, at the tr unk or station level, is configur ed using the Bogen Model TAMB2, Telephone Access Modul

36、e. Note that a power supply is r equir ed for both the tr unk and station access modes (see Figur e 3) . Multi-Zone Station Level Paging: The use of a Bogen ZPM3 Zone Paging Module per mits up to 3 zones of paging. Both one- way and two- way zones may be incor por ated in the configur ation. I nstal

37、lation instr uctions ar e included with the ZPM3. TALKBK VOL SWITCH SENS SWITCH DELAY MIN MAXMIN MAXMIN MAX TEL LINE MUTE GND COM 25V 70V+ TO TBA15 CR1 CR2 SW1 25V OR 70V A74-2665-01 Figur e 1 TBA15 Ter minal St r ip Figur e 2 Remot e Pr ivacy 2 NOTES: CR1 AND CR2 ARE 50pr v, 1A (I N4001 OR EQUI VAL

38、ENT) . SW1 I S AN SPST SWI TCH. 3 Adjustment Pr ocedur es Contr ols ar e pr ovided to adjust the per for mance of the TBA15. Since these contr ols inter act with each other , the following pr ocedur e should be used to set the unit for optimum per for mance. Adjusting the per for mance of the TBA15

39、r equir es two people; one in the talk back zone having the highest backgr ound noise level, and one at the amplifier location. Due to the high sensitivity of a telephone mouthpiece, sound fr om a near by speaker may cause the TBA15 to switch. Do not adjust while using a speaker located near the tel

40、ephone. Not e: Wher e possibl e, use onl y one t ype of speaker in each z one. Hor n-t ype l oudspeaker s pr ovide a significant l y st r onger t al k back signal t han a cone-t ype speaker and, pr efer abl y , shoul d be used when t his pr ocedur e is per for med. Al so, bet t er r esul t s ar e ac

41、hieved when speaker s ar e t apped cl oser t o t heir maximum power . 1. Set the SWI TCH SENS contr ol at its full counter clockwise position. 2. Set the SWI TCH DELAY contr ol at about mid- r otation. 3. Have the per son in the talk back zone speak in a voice loud enough to over come the ambient ba

42、ckgr ound noise level. Rotate the TALKBK VOL contr ol clockwise to obtain an acceptable volume level over the handset. The talk back volume level should be set on the low side to impr ove intelligibility. Higher settings will tend to muddy the sound, since the backgr ound noise will become a signifi

43、cant signal at the telephone. 4. With the per son in the paging zone silent, r otate the SWI TCH SENS contr ol clockwise until the switching becomes unstable (switches back and for th by itself) . Rotate the contr ol counter clockwise until the switching again becomes stable. At this point, the unit

44、 is cr itically stable; any noise on the telephone side will cause the unit to switch to the talk mode and any loud impulse- type noise at the loudspeaker may cause the unit to switch to the talk back mode. 5. With the per son in the talk back zone speaking, r otate the SWI TCH SENS contr ol counter

45、 clockwise so that the unit does not switch. 6. Have the per son in the talk back zone make loud impulse noises that may be char acter istic of the envir onment (door slamming, machine noises, etc. ) . I f necessar y, make additional adjustments to the SWI TCH SENS contr ol so that the unit does not

46、 switch momentar ily to the talk mode. 7. Speak into the telephone handset in a nor mal paging voice. The TBA15 should switch to the talk mode (switching will be appar ent by the total absence of backgr ound noise in the handset ear piece) . I f the unit does not switch, incr ease the sensitivity by

47、 r otating the SWI TCH SENS contr ol clockwise until switching becomes consistent. Recheck the units r esponse to impulse noises, making sur e that the per son in the talk back zone is not unchar acter istically close to the loudspeaker . 8. To set the switching delay, star t a moder ately fast alte

48、r nate count between the telephone side and the talk back zone. Adjust the SWI TCH DELAY contr ol so that the complete r esponse fr om the talk back zone can be hear d. (Clockwise r otation minimizes delay, counter - clockwise r otation incr eases delay. ) Then, while speaking into the telephone han

49、dset, check the delay to ensur e it will allow shor t pauses between wor ds without switching into the talk back mode. Adjust for a slightly longer delay if the unit switches between wor ds. A slight pause is gener ally advisable for speech continuity and intelligibility. 4 STATION/ TRUNK PAGE OUT PT PRTR 24VDC 150mA TAMB2TELEPHONE PAGING ACCESS MODULE POWER SUPPLY TO STATION * POWER SUPPLY REQUIRED FOR TRUNK LEVEL ACCESS ONLY NO C NC CONTACT CLOSURES TEL LINE GND COM 70V TBA15 ZONE 3 ZONE 2 ZONE 1 1 WAY2 WAY PREANN ONPREANN OFF CONF ONCONF OFF LOCK SUBFREE SUB TALK BAT