Cary Audio Design SLI 80 Owner's Manual download pdf (Page 12)

TROUBLESHOOTING GUIDE

SYMPTOM

CAUSE

REMEDY

Hum or "Buzzing" through

speakers

Ground Loop

Intermittent or poor connection

of interconnect ground

Install 2-pin adapter on

A.C. cord to float the

Ground

Replace interconnect

"Popping or Spitting" noise

Noisy tube

If noise is in one channel,

through the speaker swap one

section of tubes at a time until

the noise swaps channels.

Replace noisy tube.

Check bias of output tubes. If

high or fluctuating rapidly,

replace output tube.

(See Bias Adjustment, p 11)

AC fuse blows

Line voltage surge

CV729 shorted

Replace fuse

Replace CV729/5U4

Tube fuse blows

Shorted output tube

Replace tube

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