91 8Z;CABLEO.K.
92 12Z
93 16Z
94 >16Z;CABLEBREAK
BIASControlPanel
Important note:
95BIASCHECKV1
96BIASCHECKV2
97BIASCHECKV3
ThisgreenLEDindicatesthefollowingresults:
1. During an impedance check, it signifies an (overall) impedance of 8 ohms.
2. During the cable check, it signifies the cord is intact.
ThisyellowLEDindicatesthefollowingresults:
During an impedance check, it signifies a relatively unusual (overall) impedance of 12
ohms.Thismaybeattributabletospeakertolerance(perhapsyou'redealingwitha16-
ohm system), faulty cables, or a poor contact between plugs and jacks (in this case, it
may be an 8-ohm system), or a serial setup consisting of one 4-ohm and one 8-ohm
speaker.
ThisgreenLEDindicatesthefollowingresults:
During an impedance check, it signifies an (overall) impedance of 16 ohms.
ThisredLEDflashestoindicatethefollowingresults:
1. During an impedance check, this signifies an impedance greater than 16 ohms, a
break in the connector cable (test the cord separately!), or a break in the cabinet's
internalwiring.
2.Duringacablecheck,itsignifiesabreakinthewireoroneoftheplugs.
Thisfeature serves tocheck and adjustthe bias(that is,the idle current)of 6L6GCand
EL34 power tubes. The control and indicator panel is on top of the amp chassis and is
accessibleonlywhentheamp'srearpanelisremoved.
The elements on the BIAS Control Panel are not standard control
features for use in normal operation. Designed for purposes of convenience and fast,
easy power tube replacement, they may be accessed and adjusted by qualified and
authorizedspecialistsonly!
Press this button to check the V1 power tube's bias (idle current). The LED chain
comprisingHiBIAS(99),InRange(100),andLoBIAS(101)indicatestheresults.
Press this button to check the V2 power tube's bias (idle current). The LED chain
comprising Hi BIAS (99), In Range (100), and Lo BIAS (101) indicates the results. This
tube is operative in Hi Power mode (100 watts) only, that is, when function 44 is
activated!
Press this button to check the V3 power tube's bias (idle current). The LED chain
comprising Hi BIAS (99), In Range (100), and Lo BIAS (101) indicates the results. This
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