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General| Brand | Fender |
|---|---|
| Model | Polaris |
| Category | Synthesizer |
| Language | English |
Overview of the Chroma Polaris synthesizer, its hybrid nature, and key features.
Details the voice structure, signal processing, and modulation elements.
Explains memory chips, locations, addresses, and data storage.
Explains DMA for high-speed data transfer without CPU intervention.
Covers the main board circuitry, including the computer and synthesizer.
Details the RAM and EPROM configurations and chip layouts.
Describes the MIDI communication circuitry, UART, and clock generation.
Details the circuitry for individual synthesizer voices.
Describes the dual oscillator chip and its functions.
Explains the low-pass filter and resonance control.
Introduces the output board circuitry for audio output.
Details the circuitry for headphone and line audio output.
Instructions on how to open the unit for servicing.
Establishes a basic sound for testing and diagnosis.
Explains how to interpret diagnostic LEDs and modes.
Adjusting the digital +5V supply level.
Adjusting the reference +5V supply level.
Adjusting the analog-to-digital converter range.
Adjusting the digital-to-analog converter for zero offset.
Procedure for tuning the synthesizer voices.
Trimming VCA volume offset for proper envelope shaping.
Procedure for restoring memory and default settings.
Steps to verify the overall functionality of the unit.
Procedures to test individual synthesizer channels.
Verifying that various controls and functions are adjusted correctly.
Procedures to test the sync, MIDI, and cassette interfaces.
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