Tech Note
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Issue Date: 3-Aug-07
Ref. No: Tech Note# 187
Subject: Electrolytic Capacitors C47 and C48
Information Only Apply to Service Units Only Update Stock & Service Units
Applicability: XTi, CDi, and DSi Amplifiers built in September 2006
Conditions: Electrolytic Fluid leaking from caps causing board damage.
Part Description: 133323-1; Cap, 3800UF 125V Alum Elect.
Procedure: Some of the electrolytic capacitors used in XTi, CDi, and DSi amplifiers built during the month
of September 2006 have been found to have a defect that allows them to leak fluid onto the
board. The fluid could eventually cause the high voltage traces on the printed circuit board to
short and the amplifier to fail.
Inspect the area around C47 and C48 as shown in figure 1 below. If fluid is observed in this
area the main board must be replaced.
Figure 1
Summary: This failure mode has contributed to a very small number of amps. This note is only
issued for informational purposes only.
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