ADJ GPR922-3 /GPR922-1 /GPR922-2 Display Circuit Board

The ADJ GPR922-3 / GPR922-1 / GPR922-2 Display Circuit Board assembly is a modular three-board system designed for digital display, analog adjustment, and signal amplification in industrial or laboratory control equipment. It provides precision readout and front-panel control for voltage, current, or process variable display. Model: GPR922-3 / GPR922-1 / GPR922-2 Type: Multi-board Display and Control Assembly Function: Displays analog measurement values, processes control signals, and provides adjustable output reference Display Type: 4-digit seven-segment LED numeric display (red) Display Driver IC: NEC µPD2901 or equivalent BCD-to-seven-segment driver Main Control IC: Intersil ICL7107 3½-digit A/D converter and display driver Adjustable Controls: Three potentiometers for voltage/current offset and calibration (multi-turn precision trimmers) Power Supply: ±5 VDC logic and ±15 VDC analog (typical from main power supply unit) Input Type: Analog voltage signal (typically 0–200 mV to 2 VDC input range) Output Type: Digital display output corresponding to measured analog signal Connectors: Ribbon cables interconnecting the three boards (GPR922-1 logic/display, GPR922-2 control, GPR922-3 LED interface) Capacitors: Aluminum electrolytic and ceramic capacitors for filtering and stability PCB Material: FR-4 fiberglass epoxy laminate, double-sided plated through-hole construction Board Mounting: Front-panel or chassis-mounted with screws and standoffs Indicators: Red and green LED indicators for signal/power status Calibration Access: Front-accessible trimmers for zero and span adjustment Operating Temperature: 0°C to +60°C Storage Temperature: -40°C to +85°C Cooling: Passive convection (no active cooling required) Dimensions: Combined approx. 150 mm × 90 mm × 60 mm (5.9 in × 3.5 in × 2.4 in) Weight: Approx. 250 g total assembly Application: Bench power supplies, test instruments, process control displays, and monitoring units Manufacturer: ADJ (Associated Design Japan or OEM industrial electronics) Country of Manufacture: Japan Please review pictures carefully and let us know if you have any questions!