harman/kardon TECH TIPS
Troubleshooting tips and solutions to common service problems
For models: HKTS7 SUB (SUB-TS7) TIP# HKTT2004-04
Subject:
Improved filter performance
Instructions:
Change four 1/6W ±5% CF Resistors in the PREAMP PCB of the HKTS 7 subwoofer amplifier. It is
recommended this procedure be followed for every unit that has to be serviced, for any reason.
Designator Original value New value h/k part number
R223 51kΩ 30kΩ
R224 51kΩ 30kΩ
110-16303J26
R226 27kΩ 10kΩ 110-16103j26
R227 27kΩ 12kΩ 110-16123j26
NOTE:
• Lack of this modification is unlikely to generate a complant
• It will have no effect in applications when the SUB input is used, or when the sub amp is used with
the FILTER switch in the OFF position.
Model
Serial Number (120v)
Serial Number (230v) Status Action
SUB-TS7
ME048503390 and below ME048708198 and below
In need of filter
modification
Change value of
R223,224,226,227
SUB-TS7
ME048503391 and above ME048708199 and above Modified by Factory None Required
SUB-TS7/TS8 harman/kardon
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