Reflex Lexicon User manual

Reflex Service Manual
Table of Contents
1.
Reflex Controls and Connectors
Front Panel 1-1
Storing and Clearing Registers
Rear Panel 1-2
Footswitches •MIDI OUT/THRU Jumper
Setting Audio Levels 1-3
Periodic Maintenance 1-3
Ordering parts 1-3
Returning units for service 1-4
2.
Specifications
3. Performance Verification
Block Diagram 3-1
Required Equipment 3-1
Initial Inspection 3-2
Functional Tests 3-3
Listening Tests 3-5
Diagnostics 3-6
Power Up Diagnostics •User Diagnostics
Audio Performance 3-14
Disassembly/Reassembly 3-17
Troubleshooting Tree 3-18
4. Theory of Operation
Analog and Converter Circuitry 4-1
SAH •DAC •Deglitch (Output Hold) •Output Circuitry
Reset, System Processor, Memory Mapping,
Interrupt Timer •Power Fail/Reset
Z80, ROM, RAM, Memory Map 4-4
NMI/ Circuit (Interrupt Timer 4-5
NMI Behavior on Power Up •INT/CKT (MIDI IN)
Front Panel, Fotswitches, MIDI I/O, EEPROM 4-6
I/O Registers •O/P Registers •EEPROM 64kbits
(8k X8), 24C65 Interface •Software Requirements
Anote on the electrical interface for the EEPROM
data I/O •I/P Registers •MIDI I/O
Lexichip II, DRAM, Clocks 4-10
DAC/ADC Control Logic and Data Port
Power Supply 4-11
5. Parts List
6. Schematics and Assembly Drawings