Gemini-P700-pwr-sm维修电路原理图.pdf

SERVICE MANUALP-700 PR PR PR PR PROFESSIONOFESSIONOFESSIONOFESSIONOFESSIONAL AL AL AL AL AMPLIFIERAMPLIFIERAMPLIFIERAMPLIFIERAMPLIFIERFeatures, Operating Instructions.Page 2Specifications.Page 4Troubleshooting.Page 5Diagrams.Page 6Parts List.Page 8Schematics.Page 11RadioFans.CN 收音机爱 好者资料库 introduction 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 cranking 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 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 possible 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 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 reduce 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 and 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 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 CONTROLS 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 here. 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 will 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 connections. 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 used 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): 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 channel. 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 Channel 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. Okay, 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 LEVEL 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. Using the Ground Lift Switch Depending on how your 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) 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 quieter 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 fix 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 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 Sensitivity (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 Air 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 subject to change without notice for purpose of improvement 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 ER 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 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 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 LEV 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 LO 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 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 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. 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 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 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 servi 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 1 3346529778810B PART # QUANTITY NAME1012-0371PANEL CONTROL2021-4671MAIN CHASSIS3031-0461TOP COVER4041-4301HEAT SINK56003-1112KNOB ROTARY(SMALL)7047-4963PCB SUPPORT8049-2064PAD FOOT910153-2201POLYFORM11196-1373SERIAL NO:LABEL12255-2091GIFT BOX13257-0061OWNERS MANUAL14156-0891WARRANTY CARD1516099-2382UK LABEL17099-2322LABEL-GREEN18099-2332LABEL-RED19099-2342LABEL-YELLOW2021095-0573VDE LABEL22099-1671A LABEL23099-1691V LABEL24099-0141LABEL-MADE INTAIWAN25099-2141LABEL-MADE INCHINA26190-0621SILICON GEL27160-0441PE BAG 160250mm28160-0521PE BAG 650650mm29160-0091PE BAG 2330cm3031121-007A14BAND-HEAD TAPPING SCREWBTB-3 36(AB)32110-1383BAND-HEAD TAPPING SCREWBTS-2 38(B)33111-046A2BAND-HEAD TAPPING SCREWBTS-3 36(AB)33111-046A2BAND-HEAD TAPPING SCREWBTS-3 36(AB)34110-187A2BAND-HEAD TAPPING SCREW/TWINSCREW 312(AB)35110-172A1BAND-HEAD TAPPING SCREW/TWINSCREW36146-7176HEXAGON MACHINESCREW37111-0601PAN-HEAD TAPPINGSCREW PTS-348(N)38102-1112PAN-HEAD MACHINESCREW PMS58(B)39107-022A4BAND-HEAD MA-CHINE SCREWM415(AB)40131-0744NUT (KNUT)4(B)41142-0082PLAIN WASHER4(Y)42143-0082SPRINGWASHER4(Y)43102-1611PAN-HEAD MACHINESCREW 312(Y)44131-0811NUT/WASHER 3(B)45102-0682PAN-HEAD MACHINESCREW4647170-367MASTER CARTON4849501262-3521PRINTED CIRCUITBOARD P-700-12262-3531PRINTED CIRCUITBOARD P-700-23262-3542PRINTED CIRCUITBOARD P-700-3PARTS LIST5074-1892INTEGRATED CIR-CUIT TDA7294V67076-0751SILICON TRANSIS-TORS 2SA13588076-077SILICON TRANSIS-TORS OR 2SB6319076-0741SILICON TRANSIS-TORS 2SC342110076-076SILICON TRANSIS-TORS OR 2SD60011076-0201SILICON TRANSIS-TORS 2SA733 (Q)(P)12076-023SILICON TRANSIS-TORS OR 2SA1015(GR)(Y)1314086-0191BRIDGE RECTIFIERKBPC804W15087-0272VU METER1617079-00311SILICON DIODE1N414818079-0202ZENER DIODE 1/2W24V (RD24EB2)1920080-0861LED (GREEN) 52122071-2022ROTARY VR 10KAL:15MM23081-0231SLIDE SWITCH 2P2CUL24081-0301SLIDE SWITCH25083-0991POWER SWITCH26001-6131DC FAN 24V(808025mm)2728092-1051AC INLET(IEC+FUSE)2930100-0722FUSE 20mm VBS UTE5A 250V31100-0631FUSE 20mm VBS UTE4A 250V32100-0641FUSE 20mm VBS UTE2A 250V3334161-16012P RCA JACK35161-17214P SPEAKER TERMI-NAL36161-1094FUSE CLIP JH-63738059-2391POWER TRANS-FORMER EI-766039147-0242COIL 1.3H 1.099 1/2T4041093-3701AC CORD SVT AWG183C VW-1 UL42093-3711AC CORD 220V VDE43093-4101AC CORD ARGEN-TINA44093-3691AC CORD 230V BS4546061-1022METAL FILM RESIS-TORS 2W 8.247060-8422CARBON FILM RE-SISTORS 1/2W 22K48060-2401CARBON 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 2.2K52060-28813CARBON FILM RE-SISTORS 1/4W 5.1K53060-2933CARBON FILM RE-SISTORS 1/4W 8.2K54060-3035CARBON FILM RE-SISTORS 1/4W 22K55060-3511CARBON FILM RE-SISTORS 1/4W 1M5657050-1532ELECTROLYTICCAPACITORS N.P10/50V58050-1621ELECTROLYTICCAPACITORS10/50V59050-1217ELECTROLYTICCAPACITORS22/50V8283209-0041LEAD WIRE (WHITE)UL1015#18AWG 66310mm84202-1101LEAD WIRE (RED)UL1015#18AWG 66310mm85200-0961LEAD WIRE (BLACK)UL1007#24AWG 99150mm8687060-7034JUMPER WIRE 0.7T/52mm P=10mm88060-7035JUMPER WIRE 0.7T/52mm P=15mm89060-7031JUMPER WIRE 0.7T/52mm P=20mm9091146-5094PIN CONNECTOR9293190-0751HEAT-SHRINK TUBING UL 28 35mm94190-2302HEAT-SHRINK TUBING UL 35 35mm95190-0632TUBE 15mm96190-0632TUBE 1 10mm9798003-6053CABLE TIES CV-1006263051-0102CERAMIC CAPACI-TOR 10P/50V64051-0482CERAMIC CAPACI-TOR 390P/50V65051-1561CERAMIC CAPACI-TOR UL 0.0047/400V6667054-0221POLYESTER CE-RAMIC CAPACITOR0.047/50V5.1KR38MAIN PCBT+24VBY921Y5321Y1321Right ch. INPUTLeft ch. INPUTRight ch. OUTPUTLeft ch. OUTPUTLeft ch. GAIN10KRV3321Right ch. GAIN10KRV3321POWERP3P4GRNLD1FUSE4213Y34321M2+4213Y24321Y112124V 0.13AFAN1M1+GRNY7115v230vPOWER PCBP1P2P5AC INLETNELVOLTAGE SELECTOR SW-POWERFBRNBLUORGBLK WHTREDY1REDY3BLKY24A 115V / 2A 230VC101SW3SW2T1768123455.1KR1082R3022KR122.2KR135.1KR111N414