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CPU Board (M1353-66503 and M1353-66513)
56 Chapter 6 Theory of Operation
CPU Board (M1353-66503 and M1353-66513)
CPU Board
M1353-66503
This board works with the 4 ohm loudspeaker and is used in:
M1351A monitors with serial number prefix ≤ 3604G.
M1353A monitors with serial number prefix ≤ 3605G.
CPU Board
M1353-66513
This board works with the 8 ohm loudspeaker and is used in:
M1351A monitors with serial number prefix ≥ 3651G.
M1353A monitors with serial number prefix ≥ 3652G.
The Central Processor Unit (CPU) Board is the heart of the system and controls most other
boards. The 68000 microprocessor and associated support ICs provide system functions;
the bus control section controls the system bus. The board contains two Flash EEPROMs
which contain all the system software.The board includes the following sections:
Microprocessor Section:
68000 microprocessor.
Flash EEPROMs containing all system software and a boot program allowing
software upgrades via the Service Connector.
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