Lexicon CP-1 User Manual download pdf (Page 36)

Lexicon

Page 32

Troubleshooting

Problem Possible Cause and Solution

Muffled sound in L&R channels When no center channel is used, the rear-panel phantom button

must be pushed IN.

Center channel sound muffled The center channel amp may be connected to the subwoofer jack

on the CP-1 rear panel. Reconnect to Center Output jack.

Hum Finding and eliminating audio hum in a complex installation can

be a very frustrating task. Often, the easiest way to identify the

culprit is to systematically eliminate devices from the audio chain.

If Cable TV is connected to any equipment in the system, start by

unplugging the Cable completely, preferably right at the wall

jack. If this eliminates, or greatly reduces the hum, it's worth a call

to your Cable company. A quick fix, assuming your cable is round

75Ω wire, is to attach a 75-300Ω transformer to the end, then attach

a 300-75Ω transformer to that, so that the end is back to a round

75Ω wire. There are commercially-available antenna lead isola-

tors which may provide additional insulation from electrical

surges.

Balance control doesn't work

in Pro Logic or Stereo Logic If there is no center channel in the system, the center channel

output is routed to both the left and right main outputs. This

means the left speaker reproduces not only the left channel

information, but also the center channel information. If you set the

balance all the way over to the right, the left channel information

will be attenuated, but the center channel wll still be present at the

left speaker. In other words, it's supposed to work that way.

Panorama Calibrate isn't working Panorama is an interaural crosstalk cancellation program that

produces an anti-phase cancellation signal to the opposite

speaker. When the calibration mode is in LEFT ONLY, there is still

cancellation signal coming out of the right speaker. This is a

psychoacoustic phenomenon and LEFT ONLY means the calibra-

tion signal should appear to come only from the left (usually to the

left of the speaker.)

Interference with AM, FM,

TV or Cable TV The CP-1 does generate minimal amounts of RF energy and is in

compliance with FCC rules. If some interfering noise is noted,

move AM loop and FM "T" type antennas away from the CP-1 and

reorient them as necessary. Use shielded cable for FM and antenna

feeds.

Erratic recall of programs Severe power surges or sags can confuse the CP-1 memory. To

correct, or if you simply want to start over, restore the factory

defaults with the procedure described at the end of this section.

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 57 58

Comments to this Manuals

No comments

Lexicon CP-1 User Manual Page 36

Comments to this Manuals