4

There are two sets of DC-1 Diagnostics Power On Diagnostics, and Extended Diagnostics Diagnostics. Power On Diagnostics are automatically executed each time power is applied to the DC-1 via the rear panel Power switch. Extended Diagnostics are not automatically executed, but can be invoked by the user for specific purposes. Extended Diagnostics include additional tests to verify front panel controls, infrared communications, and audio and video performance, as well as those used to troubleshoot...

Rom Banko

The Z80 runs off a 10MHz crystal oscillator, the Lexichip off a 22.9MHz crystal, Lexichip WCS (512fs, fs 44.1 kHz + 1.42 ). The Z80 and Lexichip communicate asynchro- (sheets 1& 6) nously, which has the following implications. Wait states are imposed on the Z80 to ensure successful A-phase access of the Lexichip. Two wait states lengthen the Z80 write strobe to three T-states (300ns), which covers the worst-case requirement of five Master Clock periods (218ns). The two wait states are...

8

Clean, antistatic, well lit work area High quality music source playback system Compact Disc Player with stereo amplifier and 2 full range stereo speakers Audio patch cables 2 single-ended,shielded audio cables with RCA plugs on both ends for connecting the outputs of the compact disc player to the inputs of the DC-1 2 single-ended shielded audio cables with RCA plugs on one end and appropriate connectors on the other end for connection to the input of the stereo amplifier. Low Distortion...

Power

Each video input is terminated with 75Q to ground. The terminated signals are applied in parallel to both the monitor and record input multiplexers (sheets 1,2). The monitor circuitry (sheet 1) and record circutry (sheet 2) have many common features. The main difference is that the monitor path includes the OSD. The DC-1 has 5 composite video inputs and 3 S-video inputs. Composite video (CV) and S-video luminance (SY) are selected by one 8-input multiplexer U6 (74HC4051). The multiplexer...

Aux Cd Tuner Tape

Deactivate Zone 2 Control ' and restore normal operation Remote Trigger ON 5dB Volume Step Remote Trigger OFF Press and hold ACCY while pressing DONE to activate a You Are Here mode which Disables mute Sets volume to -30dB Centers Balance controls Loads the Pro Logic Effect Selects the VCR1 input Sets all tone controls to OdB or OFF Location The dC_- s a highly specialized signal processing computer and requires Considerations special care during installation to ensure optimum performance. The...

1

There is one ZCLK cycle from the Lexichip per four MC cycles ZCLK is logically sheet 6 LEXPHASEAB. Inverted, it becomes LEXPHASECD, which is used to latch the Z80 address and is clocked by MC in the LEXI GAL to create LEXPHASEDA. These two signals enable the detection of the Lexichip instruction phase. The Lexichip is slaved to an external asynchronous word clock. It is synchronized in the LEXI GAL U90 . The incoming word clock FS is first clocked by MC. The resulting signal FSD is then...

C

Ado r100 sheet 3 per eco 9 60126 01 update signal names per ocr 560314-00 unless otherwise indicated, resistors are 1 1 oh unless otherwise indicated, resistors are 5 5 ixx xx denotes sheet number sector j 6 last reference designators used on video board c49, 014, fb2, j8, li, c r100, tp6, u1s, y3 CxJCumSNT C NTR l bl ck b i -i 4 5

Ground The Instrument

To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground. The instrument is equipped with a three-conductor AC power cable. The power cable must either be plugged into an approved three-contact electrical outlet or used with a three-contact to two-contact adapter with the grounding wire green firmly connected to an electrical ground safety ground at the power outlet. The power jack and mating plug of the power cable meet International...

Lexicon Dc-1 Service Manual

Parts Grounded Conductors

Save these instructions for later use. Follow all instructions and warnings marked on the unit. Always use with the correct line voltage. Refer to the manufacturer's operating instructions for power requirements. Be advised that different operating voltages may require the use of a different line cord and or attachment plug. Do not install the unit in an unventilated rack, or directly above heat producing equipment such as power amplifiers. Observe the maximum ambient operating temperature...