Tech Note
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Issue Date: 13-Sep-06: Revised Date.
Ref. No: Tech Note #183
Subject: DSP Clock Drop out.
Applicability: XTi, CDi, and DSi series amplifiers. Build Date: August 2006 (0086) and prior.
Conditions: Capacitor C925 goes out of tolerance causing the Crystal Y901 to make the DSP and or
Codec chip to become unstable, i.e
. Loud Static or Pink type noises, “Short” appear on the
display, random level changes in output, audio output to drop out on one or both channels,
severely distorted audio on one or both channels.
Part Description: C925: C.P.N.: A11369-100J1 10pF Capacitor 50V 0603 SMT
Procedure: 1) Place amplifier on bench and remove the top cover using a Torx 15 bit.
2) Locate and replace capacitor C925 with the value listed above. See Figure 1 below
showing the location of the capacitor.
C925
Figure 1
Summary: Performing the procedure outlined in this Tech Note assures the conditions listed will not be
present. Updates covered in this Tech Note have been incorporated into the Main PWA
production modules for this series of Crown amplifiers
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