Service Bulletin Inf2002-06 - Infinity Modulus MSW-1 Service Manual

Service Bulletin INF2002-06 Rev3 - November 2002
To: All Infinity Service Centers
Model: Modulus Subwoofer MSW-1
Subject: Reliability Upgrade
PURPOSE: Improve reliability of the Modulus MSW-1 subwoofer amplifier; this procedure should be
followed for every unit that has to be serviced, for any reason.
PLEASE READ FIRST BEFORE ORDERING PARTS OR SERVICING THE AMPLIFIER.
ORDER PARTS ON AS NEEDED BASIS ONLY
Infinity Part
Number Designator
QM0061
QM0055 Q4,Q5
TS0016
DR0091
810066
810156
810157
810158
810056
MS0017
RM0002
KS0027
CE0145
TS0009
The repair procedure is to be executed in 3 phases.
1) POWER SUPPLY BOARD UPGRADE - STEPS CORRESPOND WITH FIGURE 1
Step OPERATION
Q1 - This part must be IR only. Replace with QM0061, MOSFET, IRF540 TO220AB IR if needed.
1.
Use TUBING, #5 BLACK cut to .3 (TS0016) to set mounting height to 0.3".
Q4,Q5. These parts must be IR ONLY. Replace with MOSFET, IRF740 TO220AB IR (QM0055).
2. Q4 and Q5 must have black tubing on component leads: TUBING, #5 BLACK cut to .3 Inch in
length (TS0016) or equivalent.
Infinity Systems Inc.
IR = Brand International Rectifier
Ref.
Q1 MOSFET, IRF540 TO220AB IR ONLY
MOSFET, IRF740 TO220AB IR ONLY
TUBING, #5 BLACK CUT TO .3
RECT, 15A 200V MUR1540
D1
MOTOROLA ONLY
HEATSINK, FET CLIP, CLIP ON - NO
SCREW
HEATSINK, LINEAR VOLTAGE REG
HEATSINK, FET SEC BLACK
HEATSINK, FET PRIMARY BLACK
HEATSINK, FET CLIP .9 x .5 x .2
MISC, CERAMIC PLATE TO-220,
CERAMIC INSULATOR 0.025
Thermal grease
R43 RES, MF 10K0 1/4W 1%
50 DEGREE PTC THERMISTOR
RTV DOW CORNING 747 OR
EQUIVALENT
C6 CAP, E 1000uF 100V 18 x 40 105C
HEATSHIRK TUB. 1/16" DIA.
250 Crossways Park Dr.
Service Bulletin
Description
Woodbury, New York 11797 (516) 496-3400
14
Warranty labor rate: MAJOR repair
A/R = As required
Qty Comment
1
2
A/R
Substitute for
1 DR0087 if not
MOTOROLA
Used with heatsink
2
810156 on U2,U3
1
1 Replaces 810091
1 Replaces 810092
1 Use with Q1
5 Use with Q1,3,4,7,8
Use with
A/R
Q1,3,4,5,7,8, D1,D3
1
1
A/R
To replace 85 deg.
1
part
A/R For KS0026 leads
1