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INTERMEZZO 1.2s Subwoofer
Service Manual

Infinity Systems, Inc 250 Crossways Park Dr. Woodbury, New York 11797 REV 4 5/2005

INTERMEZZO 1.2s
CONTENTS

SPECIFICATIONS .............................................................3 DETAILED SPECIFICATIONS ..............................................4 CONTROLS and CONNECTIONS .........................................6 OPERATION.....................................................................10 MECHANICAL/PACKAGING PARTS LIST..............................11 EXPLODED VIEW of INTERMEZZO 1.2s ..............................12 PACKAGING ....................................................................13 TEST SET UP AND PROCEDURE .......................................14 BULLETIN INF2001-04.......................................................15 IM 1.2s ADJUST BIAS PROCEDURE....................................17 ELECTRICAL PARTS LIST .................................................18 PRINTED CIRCUIT BOARD DIAGRAMS................................27 INTEGRATED CIRCUIT DIAGRAMS ....................................34 SCHEMATICS..................................................................35

2

INTERMEZZO 1.2s Specifications
Frequency Response: 23Hz - 130Hz (±3dB) 30Hz - 130Hz (±1.5dB) 850 watts continuous (In to 89from 20Hz-100Hz with no more than 0.1% THD) 2,600 watts peak <1% (20Hz - 130Hz, @ 95dB SPL) 50Hz - 130Hz (continuously variable) 24dB/Octave 15-1/4" x 18-1/4" x 13-3/4" (387mm x 464mm x 349mm) 60 lb (27.3kg)

Subwoofer Amplifier Output:

2nd- and 3rd- Order Harmonic Distortion: Crossover Frequencies: Dimensions (H x W x D): Weight:

Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and construction details in this and related Infinity publications are therefore subject to change without notice.

3

INTERMEZZO 1.2s Detailed Specifications

4

INTERMEZZO 1.2s Detailed Specifications (Cont.)

5

INTERMEZZO 1.2s Controls and Connections

6

INTERMEZZO 1.2s Controls and Connections (Cont.)

7

INTERMEZZO 1.2s Controls and Connections (Cont.)

8

INTERMEZZO 1.2s Controls and Connections (Cont.)

9

INTERMEZZO 1.2s Operation

The operation of the Intermezzo1.2s subwoofer with regards to the proper settings for the Room Adaptive Bass Optimization System, or R.A.B.O.S., is thoroughly covered in the Owner's guide, part# 336204-001. For service purposes, the R.A.B.O.S. system is canceled when all three front panel controls (F) (L) (W) are turned fully Clockwise. The only other control of concern is the Main Level Control on the front panel, which is a traditional potentiometer.

10

INTERMEZZO 1.2s Mechanical/Packaging Parts List
Ref No. MECHANICAL 1 2 3 4 5 6 7 GASKET, REAR 12" Woofer C.M.M.D. Shielded, DCR 7.6 ohms ±10%, RABOS ASSEMBLY SCREW, 8-32 x .5 BLK, MS,PPH (16) GRILLE CUP (14) Front BAFFLE SCREW, 6-32 x .5 BLK, MS,PPH (12) AMPLIFIER 8 9 GRILLE (See options below) DÉCOR TRIM PANEL (See options below) 331106-001 335036-001 336202-001 900201-008 333249-003 335270-001 900301-008 (NOT FOR SALE) 335735-040 335739-030 Description Part Number

PACKAGING 10 11 12 13 14 15 16 17 18 RABOS KIT FOOT PAD (4) POWER CORD (15 ft) TOP END PAD BOTTOM END PAD CARTON OWNERS MANUAL WARRANTY CARD SURVEY CARD 335852-002 335459-001 336658-115 336213-001 336213-002 336504-001 336204-001 335841-001 335868-002

Description Grille, Warm Platinum Grille, Midnight Blue Grille, Rich Burgundy Décor Trim Panel, Black Décor Trim Panel, Cherry Décor Trim Panel, Maple

Part Number 335735-040 335735-050 335735-060 335739-030 335739-020 335739-010

11

INTERMEZZO 1.2s Exploded View
INTERMEZZO 1.2S CABINET (NOT FOR SALE) 4 1

2 3

4 (ROTATED) 5

AMPLIFIER (NOT FOR SALE) 7

SEE VIEW A
00446

6 VIEW A (REDUCED) DÉCOR TRIM PANEL, BLACK 335739-030 DÉCOR TRIM PANEL, CHERRY 335739-020 DÉCOR TRIM PANE, MAPLE 335739-010 9

8

GRILLE, WARM PLATINUM 335735-040 GRILLE, MIDNIGHT BLUE 335735-050 GRILLE, RICH BURGUNDY 335735-060
REMOVE THESE GRILLE CUPS AND SCREWS ONLY

TO SERVICE THE INTERMEZZO 1.2s 1) Remove the grille and side panel. 2) Extract (8) of the rubber grille retainers shown in view A above; this can be accomplished by carefully pulling them out of the cavities with long-nosed pliers or similar tool. 3) Remove the (8) Phillips screws that are now exposed. 4) Carefully lift the front baffle, with driver and RABOS controls attached, off the cabinet. 5) To service the amplifier, remove the (8) phillips screws at the rear of the enclosure, and push the amplifer assemby out the front.

12

INTERMEZZO 1.2s Packaging View

11 16 17 18 8

9 13

10 12

14

15

13

00450

INTERMEZZO 1.2s Test Set Up and Procedure
SIGNAL GENERATOR AC VOLT METER (10V) INTERMEZZO 1.2s UNDER TEST

AMPLIFIER

The operation of the Intermezzo 1.2s subwoofer,and the proper settings for the Room Adaptive Bass Opitmization System, or R.A.B.O.S., is thoroughly covered in the Owner's guide, part #336204-001. For service purposes, the R.A.B.O.S. system is canceled when all three front panel controls (F) (L) (W) are turned fully CW (Clockwise). The only other control of concern is the Main Level Control on the front panel, which operates like a traditional potentiometer. Equipment needed: · Function/signal generator/sweep generator · Integrated Amplifier · Multimeter · RCA cables; Speaker cables General Unit Function (UUT = Unit Under Test) Switch/Controls: MAIN LEVEL control full clockwise (0) LOW PASS FILTER knob full clockwise (130 Hz) LOW PASS FILTER button OFF (depressed) HIGH PASS FILTER button OFF (depressed) PHASE button - either position 1) From the signal generator, connect one line level (RCA) cable to the IM1.2s Low Level Input jacks (L/R) on the UUT. Use a Y-cable from a mono source if necessary to connect to both inputs. 2) Turn on generator, adjust to 140mV, 50 Hz. 3) Plug AC power cord in UUT, turn power switch ON. 4) Red LED should ON (in the Level wheel at the front of the UUT). Turn up LEVEL control to full counterclockwise (10). 5) Green LED should ON; Bass response should be heard and felt. 6) Turn LEVEL control full clockwise (0). Turn power switch OFF. 7) Connect one pair of speaker cables to one set (either R or L) of the Speaker input terminals on UUT. Cables should be connected to an integrated amplifier fed by the signal generator. 8) Turn on signal generator and adjust so that speaker level output at the amplifier is 7.0V, 50 Hz. 9) Turn power switch ON; turn LEVEL control full counterclockwise (10). 10) Bass response should be heard and felt. Sweep Function 1) Follow steps 1-3 above, using a sweep generator as a signal source ­ adjust the generator to 100mV, 50 Hz. 2) Sweep generator from 20Hz to 300Hz. Listen for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, test woofer according to the instructions below. Driver Function 1) Remove woofer from the enclosure; (instructions in exploded view on page 12); 2) Check DC resistance of woofer; it should be 7.6 ohms ±10%, 3) Connect a pair of speaker cables to woofer terminals. Cables should be connected to an integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 6.0V. 4) Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.

14

00464

SPEAKER OUTPUT FROM AMPLIFIER

335733

INTERMEZZO 1.2s

Service Bulletin
Service Bulletin INF2001-04 Rev2 ­ May 2005 To: All Infinity Service Centers Warranty labor rate: MINOR repair Model: Interlude and Intermezzo IL50, IL60, IL100s, IL120s, IM1.2s, IM4.1t Subject: No Output In the event you receive an Interlude or Intermezzo loudspeaker with the complaint: "There is no output, and the LED on the volume control does not light, red or green", check the item listed below:
1) Check the line fuse to make sure it's not damaged. Replace if necessary IL50, IL100s 3A Infinity part# FS0022 IL60, IL120s 4A Infinity part# FS0026 IM1.2s, IM4.1t 6A Infinity part# FS0027

If the fuse is intact, or the unit still does not function, check the power supply portion of the amplifier circuit, described below: 2) Refer to the Exploded view page for detailed instructions on amplifer removal from the enclosure. 3) Remove all connectors and screws necessary to detach the Power Supply PCB from the main chassis heatsink. Squeeze the heads of the plastic standoffs with long-nosed pliers to detach the PCB from the heatsink. 4) Refer to the illustration on page 2. Check the DC resistance of following parts, in circuit, with a DMM: IRF740 MOSFETS Q501, Q502 Infinity part# QM0055 IL120s IL60 22 Ohm 0.6W Resistors R506, R503 Infinity part# RM0340 422 Ohm 1/4 watt Resistors R505, R502 Infinity part# RM0397 IRF740 MOSFETS Q4, Q5 Infinity part# QM0055 22 Ohm 0.6W Resistors R17, R20 Infinity part# RM0340 475 Ohm 1/4 watt Resistors R16, R19 Infinity part# RM0075 IRF740 MOSFETS Q403,404,406,407 Infinity part# QM0055 22 Ohm 0.6W Resistors R407,410,414,417 Infinity part# RM0340 365 Ohm 1/4 watt Resistor R408,411,415,418 Infinity part# RM0072 D to S or S to D Should measure >28K ohms* G to S or S to G Should measure >400 ohms D to G or G to D Should measure >28K ohms* Should measure 22 ohms ±1% Should measure 422 ohms ±1% D to S or S to D Should measure >28K ohms* G to S or S to G Should measure >400 ohms D to G or G to D Should measure >28K ohms* Should measure 22 ohms ±1% Should measure 475 ohms ±1% D to S or S to D Should measure >28K ohms* G to S or S to G Should measure >400 ohms D to G or G to D Should measure >28K ohms* Should measure 22 ohms ±1% Should measure 365 ohms ±1%

IL50 IL100s

IM1.2s IM4.1t

* The two transistor leads should be shorted together before these measurements are taken; the DMM leads will "charge" the circuit and the value may change, but should match the values above. Very low values that do not change indicate 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 other, or any conductive material. (For models IM1.2S, IM4.1t procedure is finished; replace amplifier).

15

INTERMEZZO 1.2s
8) Connect the subwoofer amplifier to an AC power source; turn the unit ON. Measure the DC voltage at the "CD±" wires; it should be 10-20 volts. 9) If it is 25 volts or greater, turn the amplifier OFF, disconnect from the 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.

16

INTERMEZZO 1.2s
IM 1.2s ADJUST BIAS PROCEDURE
(Mandatory when any output MOSFET transistors Q305,310,320,321,306,307,311,312 are replaced)

1. Amplifier should be unplugged and OFF. 2. Remove Amp assembly from cabinet, following the instructions on Page 12. 3. Identify the Linear board assembly (PCB with the output transistors) 4. Adjust RP301 and RP302 fully Counter Clockwise. See diagram below. 5. Apply 120 VAC power to unit; turn power switch ON. 6. Verify LED illuminates 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 0.1 mV. 9. Adjust RP301 Clockwise until voltmeter reads 0.3 mV + the initial current from step #8. 10. Adjust RP302 Clockwise until voltmeter now reads 0.6 mV + the initial current from step #8. 11. Turn amplifier OFF. Disconnect AC power to unit. 12. Remove voltmeter from terminal J303. 13. Replace amp assembly back into cabinet.

17

INTERMEZZO 1.2s

Electrical Parts List
Part# Reference Designator Qty Description
Linear Amplifier/Regulator Board Semiconductors DS0001 D301,D302,D303,D304,D305, D306, D307,D308,D309,D310, D311,D312, D313,D314,D315, D316,D317,D318, D319,D320, D321,D323,D325,D330 D324 Q314,Q315,Q317 Q303,Q308,Q322,Q323 Q302,Q304,Q309,Q313,Q316,Q324 Q319 Q305,Q310,Q320,Q321 Q306,Q307,Q311,Q312 Q301 U306 U301 U304 U307 U303 U302 U305 Z303 Z301,Z302 Z304 24 RECT, 100mA 75V SIGNAL 1N4148T

DR0085 QB0002 QB0017 QB0018 QB0033 QM0015 QM0032 QM0035-S UA0003 UA0009 UF0013 UP0004 UV0007 UV0013 DZ0018 DZ0002 DZ0021 DZ0034 Capacitors CC0020 CC0040 CC0059 CC0065 CC0079 CC0082 CC0087 CC0108 CE0018 CE0098 CE0103 CE0106 CF0008 CF0035 CF0045 CC0032 CC0017 CC0021 CC0072 CC0078 CC0095 CE0121

1 3 4 6 1 4 4 1 1 1 1 1 1 1 1 1 2 1

RECT, 8A 400V TO220AC MUR860 TRANS, NPN 40V .6A TO92 2N4401 TRANS, NPN 150V 0.6A 2N5551TR TRANS, PNP 150V 0.6A 2N5401TR TRANS, NPN 250V 1A TO220 TIP47 MOSFET, IRF640 TO220AB MOSFET, IRF9640 T0220AB JFET, J111 SELECTED TR ONLY OPAMP, QUAD 14PIN DIL LM324N OPAMP, QUAD 14P DIL TL074/084 FOTO, 6PIN MOC3012 PWM, 8PIN DIL UC3842N VREG, LINEAR TO220 LM7905CT VREG, +5V 100MA TO220 LM7805CT ZENER, 2.5-37V SHUNT TL431CLP ZENER, 500mW 12V 5% 1N5242B ZENER, 500MW 15V 5% 1N5245B ZENER, 500MW 10V 5% 1N5240B

C335,C366 C313,C324,C331 C311,C312,C322,C323,C372,C373 C337,C367 C343 C350,C351,C370,C371 C332,C338 C307,C317 C329,C330 C301,C309,C310,C319,C320 C348 C305,C315,C326 C342 C306,C316 C302,C303 C358 C340 C360,C362,C363 C341 C344 C345,C347 C355,C356

2 3 6 2 1 4 2 2 2 5 1 3 1 2 2 1 1 3 1 1 2 2

CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP, CAP,

CA 470PF 100V 5% CA 4700PF 100V 10% CA .1UF 100V 20% CA 2200P 100V 10% C .1UF 50V 20% 5MMLS CA .1UF 50V 20% CA .01UF 100V 20% CA 22PF 50V 10 E 100UF 25V 20% 5MMLS E 22UF 50V 20% 5X11 5MMLS E 100UF 35V 85DEG 5MMLS E 22UF 35V BP 8X11 5MMLS F 2200PF 100V 5% 5MMLS F .022UF 100V 5% 5MMLS F .1UF 63DC 5% 5MMLS C 2200PF 600V 10% BULK C 330PF 100V 10% 5MMLS BU C 470PF 1KV 10% BULK CA 100PF 100V 10% C .22UF 50V 10% .2LS BULK C 470P 100V 5 E 470UF 200V 20% 30X25

18

INTERMEZZO 1.2s

Electrical Parts List (Cont.)
Part# Reference Designator
C361 C304 R399 R349 R350 R303 R323,R326,R327,R339,R340,R341 R3107 R3106 R376 R363 R313,R395 R344,R370,R371,R372,R3101 R377,R380 R312,R329 R352,R353,R354,R364,R3104,R3105 R315,R317,R331,R333 R320,R321,R336,R337,R369 R3108 R367 R304 R319,R322,R335,R338,R384 R373 R390,R391 R389,R392 R324,R342 R3112,R3113 R368 R345 R3100 R382 R316,R318,R332,R334 R308,R309,R375,R381 R361 R351 R358,R360,R362 R314,R330 R302,R307 R357 R311,R328,R355,R356,R359,R379 R365 R305,R306 R385 R396,R397 R386 R3102 R325,R343 R348 R388

Qty
1 1 1 1 1 1 6 1 1 1 1 2 5 2 2 6 4 5 1 1 1 5 1 2 2 2 2 1 1 1 1 4 4 1 1 3 2 2 1 6 1 2 1 2 1 1 2 1 1

Description
CAP, F 6.8UF 250V 10% 27MMLS CAP, CA .1UF 100V 20% RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, RES, CF 1M0 1/4W 5% CF 10K 1/4W 5% CF 4K7 1/4W 5% CF 100K 1/4W 5% CF 330R 1/4W 5% CF 330K 1/4W 5% CF 30K 1/4W 5% CF 33K 1/4W 5% CF 150K 1/4W 5% ZERO OHM 1/4W MF 1K00 1/4W 1% MF 10K0 1/4W 1% MF 15K0 1/4W 1% MF 100K 1/4W 1% MF 2K21 1/4W 1% MF 3K32 1/4W 1% MF 4K75 1/4W 1% MF 51K1 1/4W 1% MF 5K11 1/4W 1% MF 6K81 1/4W 1% MF 200R 1/4W 1% MF 274R 1/4W 1% MF 332R 1/4W 1% MF 392R 1/4W 1% MF 750R 1/4W 1% MF 1K21 1/4W 1% MF 1K50 1/4W 1% MF 1K65 1/4W 1% MF 2K43 1/4W 1% MF 4K53 1/4W 1% MF 20K0 1/4W 1% MF 22K1 1/4W 1% MF 210R 1/4W 1% MF 30K1 1/4W 1% MF 267K 1/4W 1% MF 6K34 1/4W 1% MF 24K9 1/4W 1% MF 4K99 1/4W 1% MF 294K 1/4W 1 MF 7K87 1/4W 1% MF 47R 0.6W 1% FLAMEPROOF MF 10R 0.6W 1% FLAMEPROOF MF 100R 1/4W 1% FLAMEPRF MO 100R 1W 5% MO 4K7 1W 5 MO 3K9 2W 5% CF 10K 1/2W 5%

CF0146 CC0059 Resistors RC0004 RC0006 RC0061 RC0083 RC0087 RC0116 RC0127 RC0128 RC0135 RC0273 RM0001 RM0002 RM0003 RM0011 RM0024 RM0031 RM0035 RM0037 RM0039 RM0043 RM0065 RM0069 RM0071 RM0073 RM0079 RM0082 RM0083 RM0084 RM0089 RM0093 RM0113 RM0114 RM0118 RM0120 RM0139 RM0148 RM0165 RM0180 RM0276 RM0304 RM0336 RM0339 RM0365 RX0072 RX0074 RX0097 RC0005

19

INTERMEZZO 1.2s

Electrical Parts List (Cont.)
Part#
RC0229 RP0056 RW0022 RC0006

Reference Designator
R3103 RP301,RP302 R346,R347,R393,R394 R310

Qty
1 2 4 1

Description
RES, CF 200K 1/2W 5% POT, 5K 8MM HOR TOP ADJ/COVER RES, WW 0R1 2W 5% RES, CF 10K 1/4W 5%

Miscellaneous 480022 480028 480084 540130 BF0007 JH0008 JH0016 JH0074 KS0017 KS0019 MT0003 MT0005 MT0023 MT0036 MS0017 FO310 FO309 L302 L301 J302 J303 J301 TH302,TH303 TH301 FO304 1 1 1 1 1 1 1 1 2 1 1 2 4 1 12 SUB, #18B 6 1/4 STRIP/187X032 SUB, #18R 6 1/4 STRIP/187X032 SUB, #18G 4 187X032/#6 RING IND, CM CHOKE 150UH ELYTONE BEAD, FERRITE CNCTR, HEADER 5PIN .100CTR CNCTR, HEADER 2PIN .100CTR CNCTR, HEADER 8PIN LOCKING .1C THERMISTOR, 100K @ 25C NTC BUL THERMISTOR, PTH9L04BD22TS2F510 TERM, FASTON MALE PCMT 250X032 TERM, KWIKDISC .187 X.032 FEMA USED ON ONE END OF 480022 AND 48028 TERM, FASTON MALE PCMT 187X032 TERM, FASTON MALE PCMT 205X032 MISC, CERAMIC PLATE TO-220 Used on D324, Q305, Q306, Q307, Q310, Q311, Q312, Q319, Q320, Q321, U302, U303. MET, HTSNK CLIP HPS SERIES Used on D324, Q305, Q306, Q307, Q310, Q311, Q312, Q319, Q320, Q321, U302, U303. SCREW, #6-32X1.25 FL SLOT NYL used on L302 NUT, HEX NYLON #6-32 used on L302

FO301,FO302,FO308,FO311 FO303

810066

12

HS0079 JN0003 PCB, POWER SUPPLY BOARD Semiconductors DR0086 DS0002 DR0084 QM0055 QB0014 DD0003 DZ0021 Resistors RC0082 RC0138 RM0001 RM0012 RM0071 RM0072 RM0198 RM0340 R403 R422 R401 R405 R406, R409, R413, R416 R408, R411, R415, R418 R402 R407,R410,R414,R417,R419,R420,R425, R426 D403,D404,D406 D409,D410 D407,D408 Q403,Q404,Q406,Q407 Q401 Q402 Z401,Z402,Z403,Z404,Z405,Z406,Z407, Z408

1 1

3 2 2 4 1 1 8

RECT, 1A 600V ULTRAFAST MUR160 RECT, 100MA 200V SIGNAL 1N3070 RECT, 8A 600V ULTRAF MUR1660CT MOSFET, IRF740 TO220AB IR ONLY TRANS, PNP TO92 MPSA92TR RECT, 1A2 60V DIAC ZENER, 500MW 15V 5% 1N5245B

1 1 1 1 4 4 1 8

RES, RES, RES, RES, RES, RES, RES, RES,

CF 100K 1/2W 5% CF 200K 1/4W 5% MF 1K00 1/4W 1% MF 100R 1/4W 1% MF 332R 1/4W 1% MF 365R 1/4W 1% MF 205K 1/4W 1% MF 22R 1/4W 1% FLAMEPROOF

20

INTERMEZZO 1.2s

Electrical Parts List (Cont.)
Part#
RX0046 Capacitors CC0040 CC0087 CE0013 CF0093 CE0040 CF0050 CF0143 DNI C409 C421 C415,C416,C418 C406,C408,C412,C414 C401,C402,C403,C422,C423,C424 C426, C427, C430, C431 C428 C428, C429 1 1 3 4 6 4 1 2 CAP, CAP, CAP, CAP, CAP, CAP, CAP, CA 4700PF 100V 10% CA .01UF 100V 20% E 47UF 50V 20% 5MMLS F 4700PF 100V 5% 5MMLS E 680UF 200V 30X35 85DEG F .1UF 250V 10% 10MMLS FY1 4700PF 250V 20%

Reference Designator
R421

Qty
1

Description
RES, MO 47K 1W 5%

Miscellaneous 500113 JH0008 KS0021 MT0023 810066 810096 810099 HN0006 HS0060 PCB, EMI Filter Board Semiconductors DR0038 DS0001 QB0002 DB0006 UV0007 UV0013 DZ0012 Resistors RC0004 RX0083 Capacitors CC0059 CE0003 CE0103 CF0057 C507 C505,C506 C503,C504 C501,C502 1 2 2 2 CAP, CA .1UF 100V 20% CAP, E 2.2UF 50V 20% 105C CAP,E 100UF 35V 85DEG CAP,FX.22UF 250V 10% R501 R503 1 1 RES, CF 1M0 1/4W 5% RES, MO 150R 3W 5 D502,D503,D504,D505 D512 Q501 D501 U502 U501 Z502,Z503 4 1 1 1 1 1 2 RECT, 1A 400V GENERAL 1N4002 RECT, 100mA 75V SIGNAL 1N4148T TRANS, NPN 40V .6A TO92 2N4401 RECT, 8A 400V BRIDGE VREG, LINEAR TO220 LM7905CT VREG, +5V 100MA TO220 LM7805CT ZENER, 500MW 3.9V 5% 1N5228B T403,T404 J401 TH401 FO401,FO402,FO403,FO404 2 1 1 4 6 1 1 4 4 XFMR, POWER 1000W YT ETD44 3F3 CNCTR, HEADER 5PIN .100CTR SURGISTOR, 4R 8A 70J SL154R008 TERM, FASTON MALE PCMT 187X032 MET, HTSNK CLIP HPS SERIES USED ON D407,D408,Q403,Q404,Q406,Q407 MET, HTSNK PRIMARY LF SERIES USED ON Q403,Q404,Q406,Q407 MET, HTSNK DIODE LF SERIES USED ON D407,D408 NUT, HEX KEP #6-32 ZNP USED ON THE PRIMARY AND DIODE HEATSINKS SCREW, #6-32X3/8 PAN PHIL BLK USED ON THE PRIMARY AND DIODE HEATSINKS

Miscellaneous

21

INTERMEZZO 1.2s

Electrical Parts List (Cont.)
Part#
480090 480097 540124 500103 810088 JH0008 KV0001 MT0023 SR0038 HN0006 HS0009

Reference Designator

Qty
1 1 1 1 1 1 1 2 1 1 1

Description
SUB, #18R 9 187X032/1/4STRP SUB, #18B 9 187X032/1/4STRP IND, CHOKE CM XFMR, 60HZ 24V 1.1VA MET, HTSNK 1X2 BRIDGE For D501 CNCTR, HEADER 5PIN .100CTR VARISTOR, 275V 100J .6W TERM,FASTON MALE PCMIT 187X032 RELAY, SPST TV-5 5AMP 24V NUT, KEP 1/4AF 6-32 ZNP SCREW, 6-32 1/2 100 PHIL ZNP

L501 T501 J502 Z501 FO503,F0504 SW502

PCB, Input/Feature Board Semiconductors UA0003 UA0009 UF0012 DR0038 DS0001 U104 U101,U102,U103 U100 D113,D114,D115,D116,D117,D118 D100, D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D119, D120, D121,D122, D123, D124 D119, D120, D123, D124, D125, D126 Q102 Q100,Q101,Q103 Z100 1 3 1 6 19 OPAMP, QUAD 14PIN DIL LM324N OPAMP, QUAD 14P DIL TL074/084 FOTO, 6PIN 4N35 RECT, 1A 400V GENERAL 1N4002 RECT, 100mA 75V SIGNAL 1N4148T

DS0001 QB0017 QM0035-S DZ0013 Capacitors CC0024 CC0072 CC0082 CE0003 CE0098 CE0103 CE0116 CF0128 CF0045 CF0088 CF0092 CF0099 CF0112 CF0125 CE0138 dni Resistors RC0003 RC0004 RC0006 RC0037

6 1 3 1

RECT, 100mA 75V SIGNAL 1N4148T TRANS, NPN 150V 0.6A 2N5551 JFET, J111 SELECTED TR ONLY ZENER, 500MW 5.6V 5% 1N5232B

C127,C129 C125,C130 C122, C126 C123,C124 C118, C119, C131, C132 C128 C103,C104 C108, C110 C111,C112 C114,C115,C116,C117 C120,C121 C136 C102, C105, C135 C107, C109 C100,C101 C106, C113, C131, C133, C134

2 2 2 2 4 1 2 2 2 4 2 1 3 2 1 5

CAP, CA 1000PF 100V 10% CAP, CA 100PF 100V 10% CAP, CA .1UF 50V 20% CAP, E 2.2UF 50V 20% 105C CAP, E 22UF 50V 20% 5X11 .2LS CAP, E 100UF 35V 85DEG CAP, E 2.2UF 50V BIPOLAR 6X11 CAP, F .033UF 100V 5% 5MMLS CAP, F .1UF 63DC 5% 5MMLS CAP, F .01UF 100V 5% 5MMLS CAP, F 1000P 63V 5% .2LS CAP, F 0.68UF 63V 5% 5MMLS CAP, F 100PF 63V 5% 5MMLS CAP, F .068UF 100V 5% 5MMLS CAP, E 330UF 100V BP 18X35 (Do Not Insert)

R176 R162,R163 R153, R154, R155, R156, R157, R160, R161, R169, R172, R174, R175, R177 R159,R164

1 2 12 2

RES, CF 1K0 1/4W 5% RES, CF 1M0 1/4W 5% RES, CF 10K 1/4W 5% RES, CF 2K0 1/4W 5%

22

INTERMEZZO 1.2s

Electrical Parts List (Cont.)
Part#
RC0039 RC0083 RC0111 RC0115 RC0135 RC0273 RC0277 RC0281 RM0001 RM0002 RM0011 RM0019 RM0075 RM0091 RM0106 RM0113 RM0115 RM0142 RM0195 RM0110 RM0269 RM0290 RM0351 RP0105 RM0403 RC0192 dni

Reference Designator
R165,R170,R173 R149,R150,R158 R143,R148 R167 R168 R126,R130,R135,R141,R146 R171 R166 R151,R152 R110,R111,R112 R104, R105, R106, R107, R116 R115 R137 R108,R109 R113 R118,R119,R120 R114 R139,R144 R133 R122,R124,R127,R128 R136 R142,R147 R117 R123 R101, R103 R100, R102 R121, R125, R129, R131, R134, R138, R140, R145

Qty
3 3 2 1 1 5 1 1 2 3 5 1 1 2 1 3 1 2 1 4 1 2 1 1 2 2 8

Description
RES, CF 2K2 1/4W 5% RES, CF 100K 1/4W 5% RES, CF 680R 1/4W 5% RES, CF 47K 1/4W 5% RES, CF 150K 1/4W 5% RES, ZERO OHM 1/4W RES, CF 5M6 1/4W 5% RES, CF 510K 1/4W 5% RES, MF 1K00 1/4W 1% RES, MF 10K0 1/4W 1% RES, MF 100K 1/4W 1% RES, MF 1K30 1/4W 1% RES, MF 475R 1/4W 1% RES, MF 3K65 1/4W 1% RES, MF 14K0 1/4W 1% RES, MF 20K0 1/4W 1% RES, MF 23K7 1/4W 1% RES, MF 287K 1/4W 1% RES, MF 187K 1/4W 1% RES, MF 17K4 1/4W 1% RES, MF 93K1 1/4W 1% RES, MF 143K 1/4W 1 RES, MF 9K53 1/4W 1% POT, B50K QUAD KNURL SHAFT RES, MF 54K9 1/4W 1% RES, CF 2K0 1/2W 5% (Do Not Insert)

Miscellaneous JC0052 JC0064 JC0176 JH0008 JH0074 SR0006 SR0017 SR0041 SR0042 PCB, RABOS Semiconductors UA0009 UA0010 QB0017 QM0035-S QB0017 U200 U201 Q204 Q201,Q202,Q205 Q200 1 1 1 3 1 OPAMP, QUAD 14P DIL TL074/084 OPAMP, DUAL 8PIN DIL TL082 TRANS, NPN 150V 0.6A 2N5551TR JFET, J111 SELECTED TR ONLY TRANS, NPN 150V 0.6A 2N5551 J101 J105 J100 J102 J103,J104 1 1 1 1 2 2 2 1 1 CNCTR, RCA QUAD JACK DC POWER JACK 2MM DIA 8X BINDING POSTS GOLD KNURL CNCTR, HEADER 5PIN .100CTR CNCTR, HEADER 8PIN LOCKING .1C SWITCH, CAP FOR SR0005 USED ON S101 & S102 SWITCH, 2 POLE 2PDT DPST PUSH SWITCH TV-8 SWITCH CAP, 8.8X10.5MM CYL BLK

S101,S102 S100

23

INTERMEZZO 1.2s

Electrical Parts List (Cont.)
Part#
RC0148 RM0001 RM0002 RM0003 RM0012 RM0024 RM0031 RM0076 RM0078 RM0080 RM0091 RM0260 RM0271 RM0281 RM0315 RM0369 RM0370 RM0402 RP0087 RP0088 Capacitors CE0003 CF0045 CE0003 CF0045 C203,C204 C200,C201,C202 C210,C211 C204,C205,C206,C207,C208 2 3 2 5 CAP, CAP, CAP, CAP, E 2.2UF 50V 20% 105C F .1UF 63DC 5% 5MMLS E 2.2UF 50V 20% 105C F .1UF 63DC 5% 5MMLS

Reference Designator
R210 R207,R208 R200,R201,R214,R216,R220, R225,R228, R229,R230, R233 R219, R224 R215 R203 R231 R204 R209 R217,R223 R211 R232 R206 R222,R227 R212 R221,R226 R202 R234 R205,R213 R218

Qty
1 2 10 2 1 1 1 1 1 2 1 1 1 2 1 2 1 1 2 1

Description
RES, CF 10M 1/4W 5% RES, MF 1K00 1/4W 1% RES, MF 10K0 1/4W 1% RES, MF 15K0 1/4W 1% RES, MF 100R 1/4W 1% RES, MF 2K21 1/4W 1% RES, MF 3K32 1/4W 1% RES, MF 562R 1/4W 1% RES, MF 680R 1/4W 1% RES, MF 825R 1/4W 1% RES, MF 3K65 1/4W 1% RES, MF 1M0 1/4W 1% RES, MF 110K 1/4W 1% RES, MF 6K04 1/4W 1 RES, MF 2K67 1/4W 1% RES, MF 340R 1/4W 1% RES, MF 9K31 1/4W 1% RES, MF 11K5 1/4W 1% POT, A10K DUAL 12MM HOR SEL POT, C10K DUAL 12MM HOR SEL

Resistors

Miscellanous JH0074 J200 1 CNCTR, HEADER 8PIN LOCKING .1C

PCB, Volume Board RC0273 RP0097 RX0096 RP0106 HS0047 MM0070 MZ0034 MZ0036 RABOS CUP 1.2 C0186 MM0075 DL0014 D200 R237 R235 R236 1 1 1 1 4 1 4 1 1 1 1 1 RES, ZERO OHM 1/4W POT, A10K SINGLE/BRKT D SHAFT RES, MO 2K2 1W 5% POT, KNOB INT 1.2 LEVEL SCREW, #6-32X3/4 PAN PHIL BLK TO MOUNT VOLUME BOARD TO RABOS BOARD MISC, GASKET Used on RABOS Housing STANDOFF, 3/8 SPACER NYLON STANDOFF, 14MM LED 2PIN INTERMEZZO 1.2 RABOS HOUSING CNCTR, FEM-FEM HARN 8P 18 SHIELD MISC, RUBBER GROMMET RABOS HSG FOR SEALING RABOS HOUSING LED, 3MM BICOLOR RED/GR

24

INTERMEZZO 1.2s

Electrical Parts List (Cont.)
Part#
Miscellaneous 480033 3 SUB, #18R 4 1/4 187X032/187X032 1PC. IEC LIVE TO FUSE HOLDER; 1PC. FUSE HOLDER TO SWITCH; IPC. IEC NEUTRAL TO SWITCH SUB, #16X2 24 205X032/250X032 SPEAKER WIRE CUP ENCLOSURE U-BRACKET FUSE, HOLDER PANEL MT FUSE, 6A 250V 1.25X.25 GLASS SCREW, #6-32 3/4 PAN PHIL BLK 4PCS. USED TO MOUNT LINEAR BOARD; 4 PCS USED TO MOUNT POOWER SUPPLY; 4 PCS USED TO SCREW VOLUME BOARD ONTO RABOS BOARD SCREW, #8-32X1/2 PAN PHIL BLK USED TO ATTACH U-BRACKET TO ENCLOSURE SCREW, #6-32 X 3/8 PP BLACK 4PCS USED TO MOUNT EMI PCB IN HOUSING; 4 PCS USED TO MOUNT EMI HOUSING UBRACKET; 6 PCS TO SECURE PANEL TO ENCLOSURE SCREW, #4 HI-LOW PAN PHIL BLK USED TO SECURE RABOS BOARD IN HOUSING INTERMEZZO 1.2 MAIN ENCLOSURE INTERMEZZO 1.2 MAIN PANEL CNCTR, 5PIN FEM-FEM HARNESS 7 J401 ON POWER SUPPLY TO J302 ON LINEAR CNCTR, AC IEC SOCKET .250 2PIN CNCTR, 5-PIN FEM-FEM HARNESS SHIELDED 14 J502 ON EMI TO J102 ON FEATURE CNCTR, 8-PIN FEM-FEM HARNESS SHIELDED 18 J104 ON FEATURE TO J200 ON RABOS CNCTR, 8-PIN FEM-FEM HARNESS SHIELDED 18 J103 ON FEATURE TO J301 ON LINEAR 2-CONDUCTOR AC LAMP CORD 8 4X187X032 STANDOFF, 3/8 #6-32 NYLON HEX USED TO MOUNT LINEAR BOARD SWITCH, ROCKER TV5 SCREW, #4-1/2 TYPE AB PP BLK 6 PCS. USED TO SECURE BINDING POSTS TO PANEL; 1 PC. USED TO SECURE RCA JACKS TO PANEL SCREW, #8-32X1.3/4 PAN PHIL BL USED TO MOUNT U BRACKET TO ENCLOSURE

Reference Designator

Qty

Description

480104 930052 930053 FH0006 FS0027 HS0047

1 1 1 1 1 12

HS0057 HS0060

3 14

HS0078 INTERMEZZO 1.2H INTERMEZZO 1.2P JC0079 JC0129 JC0179

2 1 1 1 1 1

JC0180

1

JC0181

1

JC0182 MZ0042 SR0032 HS0054

1 4 1 7

HS0088

1

25

INTERMEZZO 1.2s

Electrical Parts List (Cont.)
Part#
HS0090 HW0004 HW0040 MM0071 MM0073

Reference Designator

Qty
2 8 1 1 1

Description
SCREW, M3X16MM PAN PHIL BLK TO ALIGN SR0041 WASHER, SPLIT #6 ZNP TO MOUNT POWER SUPPLY AND LINEAR BOARD WASHER, FLAT #8 NYLON 3/8 USED TO MOUNT U BRACKET TO ENCLOSURE MISC, CUP GASKET INTERMEZZO 1.2 MISC, RUBBER GROMMET FOR 5PIN FOR SEALING ENCLOSURE OF THE 5PIN CABLE HOLE MISC, RUBBER GROMMET 2X8 PIN FOR SEALING ENCLOSURE OF 2X8 PIN CABLE STANDOFF, 6-32 3/8 ROUND AL 4PC TO SUPPORT POWER SUPPLY STANDOFF, .12ID .25OD .37L PVC TO ALIGN SR0041 POT, KNOB CR00-20MB-16H

MM0074 MZ0003 MZ0043 RP0057

1 4 2 1

26

INTERMEZZO 1.2s

AC Filter

27

INTERMEZZO 1.2s

Feature

28

INTERMEZZO 1.2s

RABOS

29

INTERMEZZO 1.2s

Power Supply

30

INTERMEZZO 1.2s

Linear Board

31

INTERMEZZO 1.2s

Power Supply

32

INTERMEZZO 1.2s

Linear Board

33

INTERMEZZO 1.2s

Integrated Circuit Diagrams
TRANS, 250V TO220,TIP47 Q319
RT/ C T

-5V TO220, 7905CT, REGULATOR U303, 502
1. GROUND 2. INPUT 3. OUTPUT

B C E

+5V TO220, 7805CT REGULATOR U302, 501
1. INPUT 2. GROUND 3. OUTPUT

JFET, J111, Q100,101,103,201, 202, 205, 301 1. D 2. S 3. G

1 2 3

FOTO, MOC3012, 4N35 U304, 100

OPAMP, DUAL 8 PIN, TLO82 U201
TRANS, PNP, 2N5401TR, TO92, MPSA92TR Q302, 304, 309, 313 316, 324, 401 1 2 3

MOSFET, IRF640/740, IRF9640, TO220AB Q305, 310, 320, 321 306, 307, 311, 312, 403, 404, 406, 407
TRANS, NPN, TO92, 2N4401, 2N5551TR, 2N5551, 2N555, Q314, 315, 317, 303, 308, 322, 323 501, 102, 204, 200 1. G 2. D 3. S

OPAMP, QUAD, 14 PIN, LM324N, TL074/84 U306, 301, 104, 101, 102, 103, 200

1 2 3

34

00462

Intermezzo 1.2s Schematics
35

Intermezzo 1.2s Schematics

36

Intermezzo 1.2s Schematics

37

Intermezzo 1.2s Schematics

38

Intermezzo 1.2s Schematics

39

Intermezzo 1.2s Schematics

& RABOS Gain PCB

40

41

Intermezzo 1.2s Schematics

42