A C BFRONT PANEL91 0LAMPA - BALANCE - This is a special Noble balance control. Unlike most balance controls, thisone has no loss at center (detented) and can be considered to be a straight wire if it is in the12:00 position. It only reduces the volume of one channel at a timeB - VOLUME - This is also a high quality Noble conductive plastic precision attenuator.C - BACKLIT PANEL -NOTE: Models produced after April 2003 use super bright LEDs for badge illumination, notincandescent lamps. The LED's will probably never burn out. But who knows...?This is the power indicator. If the IEC mains is properly connected and the On/Off Switch is"ON" and this panel does not glow then you probably have a blown mains fuse. It is located as part ofthe IEC socket assembly. If the badge does not glow but the tubes do and you have music then theillumination (LAMP or LED) is dead. It can be replaced easily. See the drawing below. The lamplooks just like a fuse .Do NOT put a fuse here. Replace it with a 12 volt, 0.15 amp, 1/4 X 1 1/4 lamp.It pulls straight up if the Stingray is upside down but you may need a hook or needle-nose pliers to getit started. Don't crush & break the glass.LAMP ACCESS BACK PANELD- FUSE COVER- Pry in the small slot to move the locking tab towards the fuse cover andit should pop open. Only use an MDL 3 SLO-BLOW fuse if it needs replacing (MDL 1.5 for220V units). That's SLO-BLOW or TIME DELAY type fuse!E - POWER SWITCH -Towards the fuse or away from the IEC power cable is ON (1),towards the power cable is OFF (0). Because tubes require some time to warm up there isabout 10 or 20 seconds of silence followed by "not good sound" before "wow". The best wayto power up the system is sources (CD, turntable, etc) first, then after about 10 seconds - turnon the Stingray. Wait a minute or so - then you can turn up the volume and play tunes. Thissequence prevents pops and thumps and may protect your speakers. Some people hear adifference after an hour or two but it will be a small improvement and nothing to worry about- this is normal, just warming up. Powering down is the opposite order - Stingray first.F - IEC MAINS SOCKET. This is where the power cable goes. Note that your amp shouldbe wired correctly for your country. You may want to check the packing box to be sure. Alsonotice that this is a grounded 3 pin cable. If you get a hum problem, see the previous page forsome simple troubleshooting hints.