Gemini-P700-pwr-sm维修电路原理图.pdf

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1、SERVICE MANUAL P-700 PR PR PR PR PROFESSIONOFESSIONOFESSIONOFESSIONOFESSIONAL AL AL AL AL AMPLIFIERAMPLIFIERAMPLIFIERAMPLIFIERAMPLIFIER Features, Operating Instructions.Page 2 Specifications.Page 4 Troubleshooting.Page 5 Diagrams.Page 6 Parts List.Page 8 Schematics.Page 11 RadioFans.CN 收音机爱 好者资料库 in

2、troduction Congratulations on purchasing this Gemini P-700 Power Amplifier! Youve made a really wise choice because this state-of-the-art amplifier has the latest features and technology and is backed by a three-year warranty! We know youre anxious to hook everything up and start mixing beats and cr

3、anking up the volume on those hot dance tracks, but we suggest reading this instruction manual first as there are some really cool features on this amplifier that we wouldnt want you to miss! features State-of-the-art circuitry for the finest sound quality and reliability High output power to drive

4、professional speakers without clipping but also tame enough for home use Protection Circuitry (short circuit, thermal cut- off, sub/ultrasonic frequency filters, turn-on delay, main fuse, secondary fuses) Unbalanced stereo inputs with RCA type jacks Ground lift switch for achieving the quietest poss

5、ible operation Large blue-light illuminated VU meters to give you greater control and they look really cool Ultra-modern design with professional 19” rack mounts. Front-to-rear airflow with variable speed fan control for maximum cooling and quietest possible operation. Variable speed fan for quieter

6、 operation with softer music and home use. Compact 2U well balanced enclosure Steel reinforced chassis construction for durability and longevity. Common sense Some of these things go without saying, but were going to say them anyway! Read all operating instructions before using this equipment. To re

7、duce the risk of electrical shock, do not open the unit. There are NO USER REPLACEABLE PARTS INSIDE. For all repairs or service questions please contact the Gemini Service Department or your authorized dealer to speak to a qualified Gemini Sound Products technician. Be sure to allow adequate front a

8、nd rear ventilation to avoid possible heat damage to your equipment. Be sure that AC power is OFF and all level controls are set to MINIMUM before making connections. This will eliminate any chance of unexpected loud buzzes, pops or clicks that could damage your speakers. DO NOT EXPOSE THIS UNIT TO

9、RAIN OR MOISTURE. Operators of electronic equipment should never be in contact with water Keep your power amplifier grounded for maximum safety by always using a 3-prong plug. If you are using an extension cord, always use a 3-prong cord as well. DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY CONT

10、ROLS OR SWITCHES. RadioFans.CN 收音机爱 好者资料库 hook it up Okay, lets get connected! REAR PANEL Input Section: Input Jacks (1) Your amplifier has unbalanced stereo RCA type jacks, with the tip of the jack being positive (+) and the sleeve part being negative (-)/ground. Connect the output of your mixer he

11、re. Output Section: Disconnect unit from the AC power source before making any connections. Pay close attention to polarity when connecting your speakers. (Connect the positive wire to the red terminal and the negative wire to the black terminal). Connecting your speakers using the wrong polarity wi

12、ll not damage your speakers, but will impact the quality of the sound (lack of bass and incorrect stereo image). Speaker Outputs (3): the speaker output connectors are terminals that will accept a standard banana plug, or bare wire. Make sure that all the connections are clean when using bare wire c

13、onnections. If any strands of wire from one connector touch the connector next to it, the sound will distort, and your amplifier will overheat. NOTE: Total speaker impedance must not be lower than 4 (Ohm) per channel AC Power Section: Fuse (4): replace with proper type and rating. AC Inlet (6) is us

14、ed to attach the power cord to the unit. AC line voltage switch (5) allows reconfiguring amplifier for either 110-120 V or 220-240 V AC lines. Ground Lift Switch (2) is used to lift the ground from the chassis. (See the Ground Lift Switch Instructions for more detail.) FRONT PANEL Power Switch (10):

15、 turns the unit on and off. Power LED (9): the power LED lights when the power is on. If the power LED does not light, refer to the trouble-shooting guide. Level Controls (7): control the input levels for each channel. Large blue-light illuminated VU meters (8) display the output level of each chann

16、el. operation Stereo Operation The unit has two channels for stereo operation. Each channel provides a separate signal at the speaker outputs. The following instructions are for use with 4 or 8 speakers of matched power ratings. 1. With the power OFF, connect your input cables to the Channel A and C

17、hannel B inputs using the RCA INPUT JACKS (1) 2. Connect your speakers to the Channel A and Channel B SPEAKER OUTPUTS (3). (The total speaker load must be at least 4 per channel.) 3. With the LEVEL CONTROLS (7) of both channels set to zero (fully counterclockwise), turn the POWER SWITCH (10) ON. Oka

18、y, now try playing some music and/or talking into your microphone, and set the level of your input as high as you think youll need it. This way it will be as high above the amplifiers noise floor as possible so youll get the best possible sound with the least amount of noise. 4. Now adjust your LEVE

19、L CONTROLS for each channel to your desired listening level. You also have the choice of keeping the volume of both speakers equal, or for certain situations you can adjust the volume so one side will be louder than the other. RadioFans.CN 收音机爱 好者资料库 Using the Ground Lift Switch Depending on how you

20、r sound system is hooked up, sometimes applying the ground will create a quieter signal path. Sometimes lifting the ground can eliminate ground loops and that annoying hum to give you quieter and cleaner overall sound. 1. With the power amp ON, listen to the system in idle mode (no music or signal)

21、with the ground ON. The GROUND LIFT SWITCH (3) will be in the left position. 2. Turn the power OFF before moving the GROUND LIFT SWITCH (3). Now lift the ground by moving the GROUND LIFT SWITCH to the right. Turn the power back ON and listen to determine which position makes the overall sound quiete

22、r with the least amount of noise and hum. CAUTION: DO NOT DISCONNECT THE AC GROUND ON THE POWER AMPLIFIER IN ANY WAY. THIS CAN BE VERY HAZARDOUS! Should you experience any difficulties or problems, you can first refer to the TROUBLESHOOTING GUIDE located on the following page. If you still cannot fi

23、x the problem, please call 1 (732) 738-9003 for Gemini Customer Service. Thats it ! Okay, that just about covers everything! NOW youre ready to grab a couple of great CDs or records, crank it up and get the party started! specifications Output Power EIA: 1kHz 1% THD, Wrms Both Channels Driven 8: .70

24、 Both Channels Driven 4: .90 Dynamic Headroom, dB: At 8:1.5 At 4:3.3 Frequency Response:.30 Hz 50 kHz Total Harmonic Distortion: .less than 0.1%, typical 0.05% at 1 kHz Signal to Noise ratio:90 dB below rated power 8 Damping factor: .greater than 150 8 Slew rate:.10 V/S Voltage gain, dB:.27 Input Se

25、nsitivity (for rated power at 8):.1Vrms Input Impedance (unbalanced):.10 k Power consumption (at rated power at 4, both channels driven): .400 W AC Power Requirements: .110-120 V or 220-240 V 60 / 50 Hz. Indicators:1VU-meter per Channel 1 Power LED Cooling: Variable Speed Fan, Front-to-Rear Forced A

26、ir Protection: Short Circuit, Thermal Cut-off, Sub/Ultrasonic Frequency Filters, Turn-on Delay, Main Fuse, Secondary DC Fuses Connectors: Inputs:.RCA Jacks Speaker Outputs:.Binding Posts Dimensions:.19”W x 11”D x 3.5”H (483 x 280 x 89 mm) Weight :.12.9 lbs (5.85 kg) Specifications and design are sub

27、ject to change without notice for purpose of improvement RadioFans.CN 收音机爱 好者资料库 troubl eshooti ng SY M PT O M C A U SE SO LU TIO N UNI T DO ES NO T PR O D UC E SO U ND. PO W ER SW I TC H NO T IN O N PO SI TI O N. M OV E PO W ER SW I TC H TO O N PO SI TI O N. PO W ER L ED D O ES NO T LI G HT. PO W E

28、R C A BL E NO T C O N N EC TED TO C O NN EC T PO W ER C A BL E TO A C SUPPLY. A M PLI FI ER O R TO O UTLET. C HEC K C O NDI TI O N O F O UTLET. AC O UTLET NO T A C TI V E . REPLA C E A M PLI FI ER M A I N PO W ER FUS E O N. M A IN A M P L IFIER FU S E D EF EC TIV E. REA R PA N EL W I TH C O R R EC T

29、 TYPE & RA TI N G . PO W ER L ED LI G HTS, B UT N O SO UN D NO I NPUT SO U RC E SI G NA L. C HEC K FO R PR O P ER FUNC TI O N O F INP UT I S PRO D UC ED BY A M PLI FI ER. I NPUT SO U RC E N O T C O N N EC TED. SO U RC E D EV I C E (M I XER, C D PLA YER, ETC . ). DEFEC TI V E INPUT C O NN EC TI N G C

30、 A BLE. C HEC K INPUT C A BL ES & C O N N EC TI O NS. SPEA K ERS N O T C O N N EC TED. REPLA C E C A BL ES I N Q U ESTI O N W I TH K NO W N DEFEC TI V E SP EA K ER C A BLES. G O O D C A BLES. SPEA K ER SYST EM I NO P ERA TI V E. C HEC K O P ERA TI NG C O N DI TI O N, C A BL ES A N D AM PLI FI ER S L

31、EV EL C O NTRO LS A R E STA TUS O F SP EA K ER SYST EM . SET TO ZERO . BE S UR E T H E LEV EL C O NTRO LS A R E PR O P ERLY S ET. SO U N D I S PR ES ENT BUT V O LUM E I S AM PLI FI ER I NP UT LEV EL C O NTRO LS A R E A DJUST LEV EL C O NTRO LS A S P ER TO O LO W EV EN THO U G H S O U RC E SET TO O L

32、O W . I NSTR UC TI O NS. D EV I C E (i . e. : C D PLA YER, M I XER) O UTPUT I S S ET TO A HI G H LEV EL. LO UD 50/ 60 HZ O R 100/ 120 HZ H UM H EA R D I M PRO PER O R D EFEC TI V E G RO UN D C HEC K FO R PR O P ER A C LI N E G RO U N D A T A T ALL TI M ES THR O U G H T H E SP EA K ERS. C O NN EC TI

33、O N A T I NPUTS. PO W ER A M P A ND A LL I NPUT D EV I C ES. I M PRO PER O R D EFEC TI V E G RO UN D C HEC K INPUT C A BL ES FO R A LL D EV I C ES A T I NP UT SO URC E D EV I C E(S). A ND SI G NA L PRO C ESSING A S W ELL A S I NP UT I M PRO PER O R D EFEC TI V E G RO UN D C A BLES TO PO W ER A M PLI

34、 FI ER. C O NN EC TI O N O N A C O UTLET. C HEC K PO SI TI O N O F G RO UN D LI FT SW I TC H G RO U ND LO O P TH RO UG H A C LI NE A S PER I NST RUC TI O N S FO R LI FTI NG T H E C O N N EC TI O N / RA C K M O UNTING . G RO U ND. NEV ER LI FT TH E A C LI NE G RO U N D O N TH E PO W ER A M PLI FI ER.

35、 I F YO U A R E N O T TO TALLY FAM I LI A R W I TH G RO U N D LI FTI NG O R UNIFI C A TI O N PR O C ED U R ES, D O N O T A TTEM PT THEM W I THO UT FI RST C O NSULT- I NG YO U R D EA L ER O R A Q UA LI FIED SO UN D TEC H NI C I A N FO R M O R E INFO RM A TI O N O N G RO U NDING . I M PRO P ERLY D O N

36、 E, SUC H PRO C ED U R ES C A N P O S E A SA FETY A N D/ O R FI R E HA ZA RD. SO U N D I S DI STO RT ED. DI STO RTI O N O C C U R RI N G I N S O U RC E C HEC K V U M ETERS D EV I C E (C D PLA YER, M I XER, ETC . ). A DJUST LEV EL C O NTRO LS A S P ER I NPUT LEV EL I S S ET TO O HI G H. I NSTR UC TI

37、O NS. FUS E BLO W S INTERM I TTENTLY. SPEA K ER LO A D I M PEDA NC E I S TO O LO W . C HEC K FO R SH O RTS O N TH E O UTPUTS. TYPE O R RA TI NG O F TH E FUS E I S NO T C HEC K YO U R SP EA K ER I M PEDA NC E. C O RR EC T. C HEC K THA T TH E FUS E TYP E A N D RA TI NG A RE C O R R EC T. em ai l For s

38、ervi ce-rel at ed questi ons you can e m ai l us at: servi ce gem i ni dj . co m For techni cal support you can em ai l us at: techhel p gem i ni dj . co m RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 1 33 4 6 5 2 9 77 8 810 B RadioFans.CN 收音机爱 好者资料库 PART # QUANTITY NAME 1012-0371PANEL CONTROL 20

39、21-4671MAIN CHASSIS 3031-0461TOP COVER 4041-4301HEAT SINK 5 6003-1112KNOB ROTARY (SMALL) 7047-4963PCB SUPPORT 8049-2064PAD FOOT 9 10153-2201POLYFORM 11196-1373SERIAL NO:LABEL 12255-2091GIFT BOX 13257-0061OWNERS MANUAL 14156-0891WARRANTY CARD 15 16099-2382UK LABEL 17099-2322LABEL-GREEN 18099-2332LABE

40、L-RED 19099-2342LABEL-YELLOW 20 21095-0573VDE LABEL 22099-1671A LABEL 23099-1691V LABEL 24099-0141LABEL-MADE IN TAIWAN 25099-2141LABEL-MADE IN CHINA 26190-0621SILICON GEL 27160-0441PE BAG 160250mm 28160-0521PE BAG 650650mm 29160-0091PE BAG 2330cm 30 31121-007A14BAND-HEAD TAP PING SCREW BTB-3 36(AB)

41、32110-1383BAND-HEAD TAP PING SCREW BTS-2 38(B) 33111-046A2BAND-HEAD TAP PING SCREW BTS-3 36(AB) 33111-046A2BAND-HEAD TAP PING SCREW BTS-3 36(AB) 34110-187A2BAND-HEAD TAP PING SCREW/TWIN SCREW 312(AB) 35110-172A1BAND-HEAD TAP PING SCREW/TWIN SCREW 36146-7176HEXAGON MACHINE SCREW 37111-0601PAN-HEAD TA

42、PPING SCREW PTS-3 48(N) 38102-1112PAN-HEAD MACHINE SCREW PMS 58(B) 39107-022A4BAND-HEAD MA- CHINE SCREW M415(AB) 40131-0744NUT (KNUT)4(B) 41142-0082PLAIN WASHER4(Y) 42143-0082SPRING WASHER4(Y) 43102-1611PAN-HEAD MACHINE SCREW 312(Y) 44131-0811NUT/WASHER 3(B) 45102-0682PAN-HEAD MACHINE SCREW 46 47170

43、-367MASTER CARTON 48 49 50 1262-3521PRINTED CIRCUIT BOARD P-700-1 2262-3531PRINTED CIRCUIT BOARD P-700-2 3262-3542PRINTED CIRCUIT BOARD P-700-3 PARTS LIST RadioFans.CN 收音机爱 好者资料库 5074-1892INTEGRATED CIR- CUIT TDA7294V 6 7076-0751SILICON TRANSIS- TORS 2SA1358 8076-077SILICON TRANSIS- TORS OR 2SB631 9

44、076-0741SILICON TRANSIS- TORS 2SC3421 10076-076SILICON TRANSIS- TORS OR 2SD600 11076-0201SILICON TRANSIS- TORS 2SA733 (Q)(P) 12076-023SILICON TRANSIS- TORS OR 2SA1015 (GR)(Y) 13 14086-0191BRIDGE RECTIFIER KBPC804W 15087-0272VU METER 16 17079-00311SILICON DIODE 1N4148 18079-0202ZENER DIODE 1/2W 24V (

45、RD24EB2) 19 20080-0861LED (GREEN) 5 21 22071-2022ROTARY VR 10KA L:15MM 23081-0231SLIDE SWITCH 2P2C UL 24081-0301SLIDE SWITCH 25083-0991POWER SWITCH 26001-6131DC FAN 24V (808025mm) 27 28092-1051AC INLET (IEC+FUSE) 29 30100-0722FUSE 20mm VBS UTE 5A 250V 31100-0631FUSE 20mm VBS UTE 4A 250V 32100-0641FU

46、SE 20mm VBS UTE 2A 250V 33 34161-16012P RCA JACK 35161-17214P SPEAKER TERMI- NAL 36161-1094FUSE CLIP JH-6 37 38059-2391POWER TRANS- FORMER EI-7660 39147-0242COIL 1.3H 1.09 9 1/2T 40 41093-3701AC CORD SVT AWG 183C VW-1 UL 42093-3711AC CORD 220V VDE 43093-4101AC CORD ARGEN- TINA 44093-3691AC CORD 230V

47、 BS 45 46061-1022METAL FILM RESIS- TORS 2W 8.2 47060-8422CARBON FILM RE- SISTORS 1/2W 22K 48060-2401CARBON FILM RE- SISTORS 1/4W 82 49060-2502CARBON FILM RE- SISTORS 1/4W 220 50060-2634CARBON FILM RE- SISTORS 1/4W 750 51060-2793CARBON FILM RE- SISTORS 1/4W 2.2K 52060-28813CARBON FILM RE- SISTORS 1/4W 5.1K 53060-2933CARBON FILM RE- SISTORS 1/4W 8.2K 54060-3035CARBON FILM RE- SISTORS 1/4W 22K 55060-3511CARBON FILM RE- SISTORS 1/4W 1M 56 57050-1532ELECTROLYTIC CAPACITORS N.P 10/50V 58050-1621ELECTROLYTIC CAPACITORS 10/50V