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Fp 38-3 Front Board; Vfd Driver/Controller Ic Pt6311(Ic2) - Hitachi HDR081 Service Manual

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SERVICE MANUAL
Controller Electrical characteristics:
Output voltages of the transformer (TR2):
(i)
3.3V: 5100 IC (IC101),flash memory (IC 1), tuner and other components.
(ii)
5V: Front panel board, Tuner , and some ICs and circuits.
(iii)
12V: hard disk and some other ic and circuits
(iv)
-25V :flaman voltage
16fp38-3 front board

VFD Driver/Controller IC PT6311(IC2)

• CMOS Technology
• Low Power Consumption
• Key Scanning (12 x 4 matrix)
• Multiple Display Modes: (12 segments, 16 digits to 20 segments, 8 digits)
• 8-Step Dimming Circuitry
• LED Ports Provide (5 channels, 20 mA max.)
• 4- Bits General Purpose Input Ports Provided
• Serial Interface for Clock, Data Input, Data Output, Strobe Pins
• No External Resistors Needed for Driver Outputs
Page 19

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