The diagram above shows a pictorial representation of the various module positions within the
MCU3 and MCU4 Control Units.
The power supply is situated beneath the main chassis and is not visible when the unit is
assembled, however the four system fuses (FS1 – 4) are easily accessible. The mains input
connector and FS1 are sited beneath a cover to avoid inadvertent user contact during normal
operation. The standby batteries are also located beneath the main chassis.
Channels 5-8 are mounted on a hinged platform positioned above channels 1-4. This design
allows easy access to channel 1-4 situated below.
The microcontroller module and LCD display are not shown on the above diagram. These are
mounted on the rear of the hinged front panel of the MCU3 and MCU4 Control units.
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