Infinity Intermezzo 4.1t Page 2 Service Manual Download

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- CONTENTS -

SPECIFICATIONS . . . . . . ……………………….………………………. . . .3

DETAILED SPECIFICATIONS . . …………………………………. . . . . . . .4

CONTROLS and CONNECTIONS . . . …………….……………..…….. . .. 6

OPERATION . . . …………………………………….…………………….. . .10

IM 4.1t ADJUST BIAS PROCEDURE…..…………………………………. .11

TEST SETUP and PROCEDURE…………………………………….. . . . .12

MECHANICAL PARTS LIST ……………………….…………………….….13

EXPLODED VIEW . . . . . . . . . . . .. …………………………..…. . . .. . . . .14

EXPLODED VIEW OF AMPLIFIER . . . . ……………………………. . . . .15

PACKAGING PARTS LIST . . . . …………………………………..…... . . .16

PACKAGING . . . . …………………………………………………..…. . . . .17

SERVICE BULLETIN INF2003-03. . . . . . .. . . . . . . . . ……….. … .. . . . .18

SERVICE BULLETIN INF2001-04. . . . . . .. . . . . . . . . ……….. … .. . . . .20

PRINTED CIRCUIT BOARD DIAGRAMS . . . . .. . . . . . . ………….. . . . .22

ELECTRICAL PARTS LIST . . . . . . . . ……………………………… . . . . .27

PASSIVE NETWORK SCHEMATIC . . . . . . . .. . . . . . . . . …….. . .. . . . .36

SCHEMATICS . . . . . . . . . . . . …………………………………………. . . .37

Summary of Contents for Intermezzo 4.1t

Page 1: ...INTERMEZZO 4 1t POWERED LOUDSPEAKER SERVICE MANUAL Infinity Systems Inc 250 Crossways Park Dr Woodbury New York 11797 REV 4 5 2005 ...

Page 2: ...PROCEDURE 11 TEST SETUP and PROCEDURE 12 MECHANICAL PARTS LIST 13 EXPLODED VIEW 14 EXPLODED VIEW OF AMPLIFIER 15 PACKAGING PARTS LIST 16 PACKAGING 17 SERVICE BULLETIN INF2003 03 18 SERVICE BULLETIN INF2001 04 20 PRINTED CIRCUIT BOARD DIAGRAMS 22 ELECTRICAL PARTS LIST 27 PASSIVE NETWORK SCHEMATIC 36 SCHEMATICS 37 2 ...

Page 3: ...cies 80Hz 500Hz 2800Hz 24dB Octave Dimensions 51 1 2 x 12 1 2 x 27 1 8 1308mm x 318mm x 689mm Weight 93 lb 42 3kg each The maximum recommended amplifier power rating will ensure proper system headroom to allow for occasional peaks We do not recommend sustained operation at these maximum power levels Infinity continually strives to update and improve existing products as well as create new ones The...

Page 4: ... A Weighting filter SNR unweighted 90 dBr 80 relative to 680W output 22k filter SNR rel 1W unweighted 60 dBr 50 relative to 1W output 22k filter Residual Noise Floor 2 mVrms 3 Volume max using RMS reading DMM VOM or A P Residual Noise Floor 1 mVrms max 3 Volume max w A P Swept Bandpass Measurement Line freq harmonics Input Impedance Line Input 10k ohms Nominal Speaker Hi Level Input 1k ohms Nomina...

Page 5: ...se immunity LPF On BOS Off ATO Turn On Time 5 ms 10 Amp connected and AC on then input signal applied Auto Mute Turn Off Time 15 minutes 20 Time before muting after signal is removed Power on Features Power on Delay Time 2 sec 3 AC Power Applied Power on LED yes Bi color LED located at front Normal On green color ATO red color Active green Standby red Transients Pops ATO Transient 10 mV peak N P S...

Page 6: ...Power Switch Subwoofer Level Control R A B O S Controls Center Frequency Adjustment R A B O S Level Bandwidth Adjustment 120V 60HZ 6A INPUTS POWER ON HIGH PASS FILTER BASS MODE AC FUSE 6A 250V OFF LOW LEVEL INPUT LOW LEVEL OUTPUT 3 2 1 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN INTERMEZZO 4 1t F L W Rear Panel Front Panel Controls and Connections ...

Page 7: ...TO POSITION 3 SET HIGH PASS SWITCH TO ON 1 2 3 4 BLACK NO STRIPE STRIPE RED 120V 60HZ 6A INPUTS POWER ON HIGH PASS FILTER BASS MODE AC FUSE 6A 250V OFF LOW LEVEL INPUT LOW LEVEL OUTPUT 3 2 1 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN INTERMEZZO 4 1t PREAMP OUTPUTS L R ONE CHANNEL SHOWN L R AMPLIFIER INPUTS BLACK STRIPE RED NO STRIPE LOOSEN TERMINALS INSERT BARE END TIGHTEN TERMINALS SET BASS MODE ...

Page 8: ...GH PASS SWITCH TO OFF 1 2 3 4 ONE CHANNEL SHOWN FRONT SPEAKER OUTPUTS 120V 60HZ 6A INPUTS POWER ON HIGH PASS FILTER BASS MODE AC FUSE 6A 250V OFF LOW LEVEL INPUT LOW LEVEL OUTPUT 3 2 1 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN INTERMEZZO 4 1t AMPLIFIER PROCESSOR SUBWOOFER LFE OUTPUT TO SECOND 4 1t SPEAKER OUTPUT INPUT L R FRONT CHANNEL OUTPUT L R ONE CHANNEL SHOWN LOOSEN TERMINALS INSERT BARE END...

Page 9: ...ur particular listening room Earlier you placed the loudspeakers in their general location Finding the exact location for optimum performance sometimes only involves moving the speakers up to a few inches in any direction We urge you therefore to experiment with placement until your speakers deliver their full potential When the speakers are moved inward toward each other there is generally better...

Page 10: ...r service purposes the R A B O S system is canceled when all three front panel controls F L W are turned fully CW Position of the Bass Mode switch for simple testing purposes Using the high level Speaker inputs switch should be in position 3 Using the line level RCA inputs switch should be in position 1 The only other control of concern is the Main Level Control on the front panel which operates l...

Page 11: ...fully counterclockwise See diagram below 5 Apply 120 VAC power to unit turn power switch ON 6 Verify that LED lights on the front Gain Control dial unless you have disconnected the plug 7 Connect voltmeter set to DC millivolt range to twin pins on terminal J303 on Linear board 8 Verify initial voltage is less then 0 1mV 9 Adjust RP301 clockwise until voltmeter reads 0 3mV the initial current from ...

Page 12: ...ould be connected to an integrated amplifier fed by the signal generator 8 Bass Mode switch should now be set to position 3 9 Turn on generator and adjust so that Speaker Level input at the amplifier is 7 0V 45Hz Turn LEVEL control fully counterclockwise 10 10 Green LED should light vigorous bass response should be seen at the woofer with grille removed Sweep Function 1 Follow steps 7 10 above usi...

Page 13: ...e shielded 335036 001 DCR 7 6 ohms 10 7 Midrange Frequency Transducer 3 1 2 89mm cone C M M D 335224 001 magnetically shielded neodymimum DCR 4 8 ohms 10 8 Mid Bass Frequency Transducer 6 1 2 165mm cone C M M D 335418 001 magnetically shielded neodymimum DCR 5 6 ohms 10 9 High Frequency Transducer 1 25mm C M M D Neodymium Shielded 335225 002 DCR 3 4 ohms 10 10 Mid Twt Crossover Network 335287 002 ...

Page 14: ...eir cavities with long nosed pliers or similar tool 3 Remove the 13 Phillips screws from both baffles 4 Tower Remove the top baffle with the drivers attached 5 Woofer Remove the 6 Phillips screws from the trim ring that is now exposed 6 Remove the trim ring with the woofer attached 7 Remove the 4 H L screws by reaching through the woofer cavity remove the lower baffle with the R A B O S controls a...

Page 15: ...INTERMEZZO 4 1t 15 Exploded View of Amplifier FEATURE BOARD XOVER SWT BOARD AC FILTER BOARD LINEAR BOARD POWER SUPPLY 00501 ...

Page 16: ...336216 003 P5 End Pad Right bottom left 336215 004 P5 End Pad Left bottom left 336216 004 P6 Owner s manual 336205 001 P6 Warranty Card 335841 001 P6 Survey Card 335868 002 P7 R A B O S Complete kit 335852 002 P7 R A B O S Test CD 335855 001 P7 R A B O S Sound Level Meter 335368 001 P7 R A B O S Key Screwdriver 091 00121 000 P7 R A B O S Q Finder 335856 001 P7 R A B O S Pouch 335853 001 P8 9 Volt ...

Page 17: ...INTERMEZZO 4 1t 17 Packaging P1 P3 P5 P7 P6 P4 P2 4 3 ...

Page 18: ...sure 5 Unplug the three connectors from the amplifier remove the amplifier from the woofer opening 6 Remove the 4 screws holding the front faceplate w controls and Feature PCB to the plastic enclosure pull the assembly out as far as the attached wires will allow If the rectangular gasket bordering the enclosure is damaged during this procedure order Infinity part MM0080 7 Unplug all wire connector...

Page 19: ...d all connectors install amplifier back into the IM4 1t enclosure Replace woofer 12 Test the unit Model Serial number 120v Status Action Intermezzo 4 1t All Serial numbers affected Distortion may be present at low volume levels Remove and re wire R153 R154 D110 on the opposite side of the Feature PCB INTERMEZZO 4 1t 19 ...

Page 20: ... a shorted MOSFET 5 Replace any defective parts above that show measured values lower than normal 6 Reconnect J505 or J6 multicolor ribbon cable connector remount the Power supply PCB reconnect J501 502 or J4 J5 black red Faston connectors 7 All models except IM1 2S IM4 1t temporarily DO NOT connect the pair of black red CD leads on the linear PCB Isolate the ends so they are not touching each oth...

Page 21: ...power source and replace IL120S IL60 Q504 Q507 IRF640 on the Power Supply PCB Infinity part QM0015 IL50 IL100s Q1 IRF540 on the Power Supply PCB Infinity part QM0020 10 If the voltage is normal turn the amplifier OFF disconnect from the power source and reconnect the CD leads 11 Finish reassembling the amplifier remount the heatsink replace the amplifier in the cabinet and test the subwoofer INTER...

Page 22: ...INTERMEZZO 4 1t Right R A B O S Left R A B O S 22 ...

Page 23: ...INTERMEZZO 4 1t Right Volume Left Volume 23 ...

Page 24: ...INTERMEZZO 4 1t AC Filter Feature Board 24 ...

Page 25: ...INTERMEZZO 4 1t 1KW Power Supply XOVER SWT BD 25 ...

Page 26: ...INTERMEZZO 4 1t Linear Class D Board 26 ...

Page 27: ...0135 R151 1 RES CF 150K 1 4W 5 RC0192 R100 1 RES CF 2K0 1 2W 5 RC0273 R117 R121 R132 3 RES ZERO OHM 1 4W RC0277 R154 1 RES CF 5M6 1 4W 5 RC0281 R149 1 RES CF 510K 1 4W 5 RM0001 R112 1 RES MF 1K00 1 4W 1 RM0002 R106 R123 R124 R162 4 RES MF 10K0 1 4W 1 RM0011 R102 R103 R128 3 RES MF 100K 1 4W 1 RM0019 R127 1 RES MF 1K30 1 4W 1 RM0075 R133 1 RES MF 475 ohms1 4W 1 RM0078 R110 1 RES MF 680 ohms1 4W 1 R...

Page 28: ...312 4 MOSFET IRF9640 T0220AB QM0035 S Q301 1 JFET J111 SELECTED TR ONLY UV0007 U303 1 VREG LINEAR TO220 LM7905CT UV0013 U302 1 VREG 5V 100MA TO220 LM7805CT DR0088 D324 1 RECT IR HEXFRED HFA08TB60 UA0003 U306 1 OPAMP QUAD 14PIN DIL LM324N UA0009 U301 1 OPAMP QUAD 14P DIL TL074 084 UF0013 U304 1 FOTO 6PIN MOC3012 UP0004 U307 1 PWM 8PIN DIL UC3842N DS0001 D301 D302 D303 D304 D305 D306 D307 D308 D309 ...

Page 29: ...S MF 1K50 1 4W 1 RM0084 R3100 1 RES MF 1K65 1 4W 1 RM0089 R382 1 RES MF 2K43 1 4W 1 RM0093 R316 R318 R332 R334 4 RES MF 4K53 1 4W 1 RM0113 R308 R309 R375 R381 4 RES MF 20K0 1 4W 1 RM0114 R361 1 RES MF 22K1 1 4W 1 RM0118 R351 1 RES MF 210 ohms1 4W 1 RM0120 R358 R360 R362 3 RES MF 30K1 1 4W 1 RM0139 R314 R330 2 RES MF 267K 1 4W 1 RM0148 R302 R307 2 RES MF 6K34 1 4W 1 RM0165 R357 1 RES MF 24K9 1 4W 1...

Page 30: ...NCTR HEADER 2PIN 100CTR JH0074 J301 1 CNCTR HEADER 8PIN LOCKING 1C KS0017 TH302 TH303 2 THERMISTOR 100K 25C NTC BUL KS0019 TH301 1 THERMISTOR PTH9L04BD22TS2F510 MT0003 FO304 1 TERM FASTON MALE PCMT 250X032 MT0005 2 TERM KWIKDISC 187 X 032 FEMA USED ON END OF 480022 AND 48028 MT0023 FO301 FO302 FO308 FO311 4 TERM FASTON MALE PCMT 187X032 MT0036 FO303 1 TERM FASTON MALE PCMT 205X032 Power Supply PCB...

Page 31: ...5V SIGNAL 1N4148T DZ0012 Z502 Z503 2 ZENER 500MW 3 9V 5 1N5228B DB0006 D501 1 RECT 8A 400V BRIDGE QB0002 Q501 1 TRANS NPN 40V 6A TO92 2N4401 UV0007 U502 1 VREG LINEAR TO220 LM7905CT UV0013 U501 1 VREG 5V 100MA TO220 LM7805CT RC0004 R501 1 RES CF 1M0 1 4W 5 CE0003 C505 C506 2 CAP E 2 2UF 50V 20 105C CE0103 C503 C504 2 CAP E 100UF 35V 85DEG 5MMLS CC0059 C507 1 CAP CA 1UF 100V 20 CF0057 C501 C502 2 C...

Page 32: ...E0115 C4 C5 2 CAP E 1UF 63V 6X11 85C 5MMLS CF0045 C1 C2 C3 3 CAP F 1UF 63DC 5 5MMLS Miscellaneous JH0061 J4 1 CNCTR HEADER 5PIN JH0074 J3 1 CNCTR HEADER 8PIN LOCKING 1C Rabos PCB Right UA0009 U1 1 OPAMP QUAD 14P DIL TL074 084 UA0010 U2 1 OPAMP DUAL 8PIN DIL TL082 QM0035 S Q1 Q2 2 JFET J111 SELECTED TR ONLY Resistors RP0087 R17 R20 2 POT A10K DUAL 12MM HO ohms5 RP0088 R6 1 POT C10K DUAL 10 MID 1 5K...

Page 33: ...O 2K2 1W 5 Miscellaneous HS0073 2 SCREW 6 19X3 8 HL PP ZNC USED ON THE RABOS RIGHT HOUSING HS0087 4 SCREW 6 19X1 HL PP ZNC USED ON THE RABOS RIGHT HOUSING JC0186 1 CNCTR FEM FEM HARN 8P 18 SHI TO CONNECT J3 ON RABOS TO J102 ON FEATURE MM0075 1 MISC RUBBER GROMMET RABOS HSG AT OPENING OF PLASTIC HOUSING FOR RIBBON CABLE MZ0034 4 STANDOFF 3 8 SPACER NYLON USED ON THE VOLUME BOARD RP0098 1 POT KNOB I...

Page 34: ...C TO MOUNT FINGER PROTECTOR TO U BRACKET 1PC F0R MM0025 ON FEATURE BOARD HS0066 4 SCREW 6 32X1 2 PAN PHIL BLK TO SECURE FINGER PROTECTOR TO POWER SUPPLY HEATSINK STANDOFFS HS0067 2 SCREW 6 3 8 TYPE A PP BLK 2PC TO SUPPORT 660035 HS0073 4 SCREW 6 19X3 8 HL PP ZNC MOUNT EMI BOARD IN PLASTIC BUCKET HS0079 1 SCREW 6 32X1 25 FL SLOT NYL L302 ON THE LINEAR BOARD HS0092 4 SCREW 6 19X3 8 HL PP BLK TO MOUN...

Page 35: ... BOARD MT0005 6 TERM KWIKDISC 187 X 032 FEMA ON EACH END OF 480001 AND 480003 ON ONE END OF 480022 AND 480028 MZ0024 2 STANDOFF 5 NYLON TO SUPPORT 660035 BOARD MZ0041 4 STANDOFF 6 1 5 HEX FEM MALE TO SECURE PRIMARY AND SEC HEATSINKS THE MALE END MUST BE FASTENED TO THE POWER BOARD MZ0043 2 STANDOFF 12ID 25OD 37L PVC TO ALIGN SR0044 SR0032 1 SWITCH ROCKER TV5 POWER SR0042 1 SWITCH CAP 8 8X10 5MM CY...

Page 36: ...IM 4 1t PASSIVE NETWORK SCHEMATIC DIAGRAM INTERMEZZO 4 1t 36 ...

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