Tube Replacement - Cary Audio Design HH-1 Owner's Manual

SERVICE AND CARE

TUBE REPLACEMENT

The Cary Audio HH-1 Headphone Amplifier's tube circuit is designed to offer several years of
performance under normal listening conditions. Please bear in mind that tube degradation is a
slow and subtle process over time. As such, after several years of enjoyment one may not notice
any significant difference in performance. Therefore, we recommend regularly scheduling tube
replacement every two to three years or sooner if usage is heavy. Please follow the procedures
below or contact Cary Audio service for an RMA at 919-355-0010.
 Tube Replacement Procedure:
Disconnect any attached connectors (headphones, AC power cord, and audio
o
cables) from the unit.
Remove screws holding top cover.
o
Remove tubes and replace them with the correct replacement tube (6922 or
o
6DJ8) being sure the pins are inserted correctly and the tubes are fully seated.
Take care in handling the tubes properly minimizing any direct contact with
o
your fingers. A soft, lint free glove or cloth works best.
Replace top cover and reinstall screws.
o
CAUTION:
 ALWAYS disconnect the unit from the AC outlet and power cord.
15