User manual MERIDIAN AUDIO 519

[. . . ] 7 No audio when playing a Laser Disc which is not AC-3 encoded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Radio interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Maintenance & Service . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Tip In common with all digital products, the 519 emits some radio-frequency signals. For this reason, try to keep all power cables and Comms leads away from audio, antenna and loudspeaker cables. Some time spent laying out the cables carefully will repay you with the best possible performance later. 519 User Guide Using 519 5 Starting off with 519 Checking Before turning on the power, check once again that you have made all the connections correctly. The 519 is designed to be left connected to AC power at all times and can be run continuously. Switching on The power switch is located directly next to the power inlet on the rear of the 519. Turn on the power switch at the rear of the unit. The yellow light on the front of the 519 will now be illuminated. If there is no light Check the power connections, including any fuses in the supply. If the light is still not illuminated, contact your dealer for help. Basic operation of 519 The 519 Laser Demodulator takes the RF output of a Laser Disc player and extracts the AC-3 data stream. This stream is transmitted via the SPDIF digital audio interface to an AC-3 decoder to be decoded into discrete audio channels. The 519 will also take the digital audio output of the Laser Disc player, and switch to it when the Laser Disc is not AC-3 encoded. AC-3 decoding is indicated by the red lock light. The 519 has connections for the Meridian 500 Series Comms system. These connections are used only to communicate with other Meridian equipment. The 519 itself uses these connections only to suppress clicks as it switches between AC-3 decoding and regular digital audio. Note The Meridian 519 can be used with or without other Meridian equipment. However an AC-3 decoder must be used to obtain an audio output. 519 User Guide Jumper Options 6 Jumper Options The 519 may be fitted with up to five internal jumpers which will change the way it operates. IN ALMOST ALL INSTALLATIONS NONE OF THESE JUMPERS WILL BE NEEDED. The unit is supplied with no jumpers fitted. It is recommended that the jumpers are fitted only by your dealer. Opening the Case WARNING: BEFORE OPENING THE CASE DISCONNECT THE 519 FROM THE AC SUPPLY. BEFORE RECONNECTING THE SUPPLY ENSURE THAT THE CASE IS FULLY REASSEMBLED. To open the case remove the four screws at the corners of the rear of the 519 and the four screws at the corners of the base of the 519. Locating the Jumper Positions There are five sets of two pins each which may be fitted with jumpers. Jumper number 1 is located on the left of the 519 when viewed from the front. Jumper 1 The Laser Disc RF output signal normally provides an 5 Volt DC signal to indicate that the Disc is playing. When jumper 1 is not fitted the Laser Disc 5 Volt signal is used by the 519 to enable AC-3 demodulation or switching to regular digital audio If your Laser Disc player does not give the 5 Volt signal fit jumper 1. Jumper 2 In normal use the 519 will switch to regular digital audio if it is unable to demodulate AC-3. This allows both AC-3 encoded and non AC-3 encoded discs to be replayed with no change of settings by the user. [. . . ] These limits are intended to provide reasonable protection against such interference in home installations. If this equipment does cause or suffer from interference to/from radio or television reception then the following measures should be tried: 1. Reorient the receiving aerial (or antenna) or route the antenna cable of the receiver as far as possible from the 519 and its cabling. Ensure that the receiver uses well-screened antenna cable. [. . . ]