PRECAUTIONARY MEASURES
1. When disconnecting any piece of equipment such as a tape deck, tuner, etc. be sure to turn off
system power.
2. When changing records, re-dialing tuner or rewinding tapes, it is recommended that the volume
control be turned down.
3. The 777 amplifier can be positioned wherever convenient, provided that some unrestricted airflow is
permitted at the top & bottom of the case. Do not place the amplifier on carpeting or any other material
that would restrict airflow. Under normal conditions the 777 will get moderately warm.
4. If it is necessary to replace a fuse, be sure to maintain the proper fuse rating.
(A) LINE FUSE (refer to back panel drawings (3) & (11).
JAPAN (100 Volt): ¾ ampere, slow blow, Model 776
5 ampere, slow blow, Model 777
NORTH AMERICA (120 Volt): ½ ampere, slow blow, Model 776
4 ampere, slow blow, Model 777
U.K. & EUROPE (220-240 Volt): ¼ ampere, slow blow, Model 776
2 ampere, slow blow, Model 777
When selecting a different line voltage, remove & rotate voltage card to desired voltage, then reinsert
card such that the printed voltage is clearly visible through the window. Change the fuse according to
the above specifications.
4. (B) OUTPUT (PROTECTION) FUSE, MODEL 777
(refer to back panel drawing (4).)
USING 8Ω SPEAKERS: 3½ or 4 ampere, fast blow
USING 4Ω SPEAKERS: 5 ampere, fast blow
5. For best possible signal to noise figures Model 776 & 777 amplifiers must be connected to a properly
grounded outlet. Do not remove the third wire grounding pin on power cord plug.
6. Do not use high gauge high capacitance audio cable.
SPEAKER CABLE should be 14 gauge for runs of under 20 feet, otherwise use 12 gauge or lower. In
either case the cable must be multi strand of pure copper. It is recommended that positive & negative
wires to the same speaker be separated a couple of inches for best results.
INTERCONNECT CABLE should be low capacitance with a braided shield.
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