Tascam DM-24 Service Manual page 35

Meaning: The voltage drops on the +5V line or it has ever dropped.
Remedy: Restart the DM-24. If this does not fix the problem, check if the power supply provides the prescribed voltage. If it does,
chances are the AC voltage momentarily dropped. It is U3 on the MAIN PCB that controls the +5V line and, when something goes
wrong on this line, check pin 8 of U3, R3, R52 and pin 76 of U33 which generate an interruption to pin 76 of the CPU (U33) for
signs of bad soldering.
Meaning: The SRAM data is out of the way.
Remedy: Run the SRAM Initialization. If this does not fix the problem, write down all error messages and check with the Tokyo
Service.
Meaning: Something goes wrong in hardware having efffects on the Effector functions.
Remedy: Check U106 on the MAIN PCB and its peripheral circuits for signs of bad soldering.
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TASCAM DM-24