Tech Tips; Improved Filter Performance - Harman Kardon SUB-TS7 Service Manual

SUB-TS7/TS8
harman/kardon
Troubleshooting tips and solutions to common service problems
For models: HKTS7 SUB (SUB-TS7)
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
R223
R224
R226
R227
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.
Serial Number (120v)
Model
ME048503390 and below
SUB-TS7
ME048503391 and above
SUB-TS7
Original value New value
51kΩ
51kΩ
27kΩ
27kΩ
Serial Number (230v)
ME048708198 and below
ME048708199 and above

TECH TIPS

h/k part number
30kΩ
110-16303J26
30kΩ
10kΩ 110-16103j26
12kΩ 110-16123j26
Status
In need of filter
modification
Modified by Factory
14
harman/kardon
TIP# HKTT2004-04
Action
Change value of
R223,224,226,227
None Required