10
Fluorophos® ALP Test System Model FLM300 Service Manual
Chapter 2
Circuit System
AC-DC Power
Supply
Application PCB
20-Sample
Incubator
Printer
Display
Keypad
RS-232
Barcode Reader
Optical Bench
Fan
Processor PCB
Figure 1: Circuit flowchart
The FLM300 is comprised of the following functional blocks:
2.1 Power Supply
The power entry assembly interfaces the AC
voltage presented to the instrument with the
AC/DC switching power supply. The power
supply provides the 12 VDC power to run the application
printed circuit board (PCB). The application PCB
distributes the 12 VDC power to the printer, incubator
heater, exhaust fan, shutter solenoid, and sample
illumination LED heater. The PCB converts the 12 VDC to
20 VDC supplied to the cuvette holder heater, 15 VDC
supplied to the PMT, and 5 VDC and 3.3 VDC to operate
various logic circuits and power the instrument display.
2.2 FL2231 PCB Set
The control board set consists of two printed circuit
board assemblies: an 80C186 processor board and an
application board.
2.3 200016PC 80C186 Processor PCB
Processor: The processor is an Innovasic 80C186 16-bit
embedded microprocessor. The 80C186 contains three
programmable 16-bit timers, two serial ports,
programmable interrupts, 1 mega-byte of memory
address space, and 64 kilo-bytes of input/output (I/O)
address space. The processor uses an external 32 MHz
crystal to generate the internal 16 MHz system clock. The
processor controls access to all memory and all I/O.
Memory Map: The 1 mega-byte of memory address space
contains read-only memory (Flash EPROM), read/write
memory (static RAM), and the real time clock. About half
of the address space is unused, allowing for future
expansion. The read-only memory is divided into four
sections: reset vector, boot code, parameter blocks
(unused), and application code. The reset vector tells the
processor where to first start executing code; in this
case, the boot code is executed first after reset. The boot
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