Unico SQ Series, Service Manual

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Electronic System
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The sockets description of the main CPU PCB as follow:
CZ1---From Power Distributing PCB
Pin 1, 2: DC +12V
Pin 3, 4: GND
Pin 5, 6: DC +5V
CZ2---To Slave CPU PCB
Pin 1: Reset W78E52B on Slave CPU PCB
Pin 2: Transfer signal to W78E52B on Slave CPU PCB
Pin 3: Receive signal from W78E52B on Slave CPU PCB
Pin 4: GND
Pin 5: DC +5V
CZ3---To RS-232 Port
Pin 1: GND
Pin 2: Transfer signal
Pin 3: Receive signal
CZ4---To Transferring PCB(In Upper Case)
Pin 1-8: Output to signal Keypad
Pin 9-12: Input signal from Keypad
CZ5---To Printer Port
Pin 1: Pulse for read the data for printer
Pin 2-9: Data bus
Pin 10: Error detect. +5V indicate the printer is OK
Pin 11: Busy detect. +5V indicate the printer is busy
Pin 12: Reset the printer
Pin 15,16: GND
CZ6---To Transferring PCB(In Upper Case)
Pin 1-4, 13: Control signal of LCD
Pin 5:
DC +5V- -20.5V, contrast adjust
Pin 6: DC +5V
Pin 7: GND
Pin 8: DC -20.5V
Pin 9-12: Data bus
CZ7---To Power Supply PCB
Pin 1: DC +5V(+3.85V). +5V: Tungsten lamps is on
Pin 2: DC +3.85V(+5V). +3.85V Deuterium lamps is on
Pin 3, 4: DC +5V
J3---To Auto-cell Connector
Pin 1-4: Drive auto-sample Holder step motor
Pin 5: DC +12V
J8---To Auto-cell Connector
Pin 1,2: DC +5V(0V)
Pin 3: DC +12V
Pin 4,5,6: DC +5V