Kurzweil CUP2 Service Manual page 6

CUP2 Service Manual
Table of Contents
Audio PCB ......................................................................................................................................................................
Function Summary
Power supply rectiers, lters, and regulators
Mixer ......................................................................................................................................................................
Headphone amplier
Frequency response shaping
2-way crossover lters
Power ampliers
Muting ...................................................................................................................................................................
Control Panel PCB
Function Summary
General ..................................................................................................................................................................
LED Matrix ............................................................................................................................................................
Switch Matrix ........................................................................................................................................................
Volume Control
Headphones ..........................................................................................................................................................
Chapter 3, Diagnostics
Diagnostic Tests .............................................................................................................................................................
Entering Diagnostics
Display and Control Panel Buttons
Test Results ..............................................................................................................................................................
Diagnostic Test Modes
Run Once .................................................................................................................................................................
Loop .........................................................................................................................................................................
Continuous ..............................................................................................................................................................
Description of Tests
SDRAM Refresh
MIDI UART .............................................................................................................................................................
Internal Flash ..........................................................................................................................................................
MARA Validity
MARA Delay RAM
MARA Sound ROM
Audio Output
Scanner DIAG
Scanner DIAG tests
Burn-in Loop ...........................................................................................................................................................
Chapter 4, Disassembly/Assembly
Introduction ...................................................................................................................................................................
Notes, Cautions, Warnings
Cables, Connectors
Required Tools and Materials
Opening the CUP2
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