JANCD-CG01 Product Description (YASKAWA) JANCD-CG01 is an early basic type of graphic/communication composite control board (CG = Graphic/Communication) in the YASKAWA JANCD series, mainly used in older CNC numerical control systems such as Yasnac J50, M-500, and i80. It is responsible for display driving, panel interaction, and system communication functions, and is a core spare part for the repair and replacement of old equipment. 1. Basic Information Brand: YASKAWA (Yaskawa Electric) Full model: JANCD-CG01 (Common derivatives: JANCD-CG01C) Component number: DF8202498 (REV.A/B) Board type: Graphic Control + Communication Interface Composite Board Applicable Generation: Yasnac J50 / M-500 / i80 CNC Systems Compatible Backplane: JANCD-BB01, JANCD-BB02, JANCD-BB50 Production Status: Out of Production (Only in second-hand / repair / refurbished channels) Weight: Approximately 0.65kg Size: Approximately 260mm × 130mm × 20mm (Standard Long Card) II. Core Functions Display Control Drive monochrome CRT display (VGA analog RGB interface) Display system coordinates, G-code programs, parameters, and tool path trajectories Basic graphic rendering and character overlay Human-computer interaction Connect to the machine tool operation panel / keyboard Process signals from buttons, knobs, mode switches, emergency stop, etc. Realize parameter input, program editing, mode switching Communication management Provide RS-232C serial interface Support communication with upper computer, programming equipment, paper tape reader Perform bus data interaction with the main CPU board (JANCD-CP50) Status monitoring Onboard PWR/RUN/ALM three-color LED status indicator Have functions for self-checking communication abnormalities, display faults, and bus errors III. Hardware Specifications 1. Electrical Parameters Power supply: 24V DC ±10% (backplane power supply) Power consumption: ≤7W Bus interface: J50 dedicated parallel bus (gold-plated contacts) Protection: Overcurrent, overvoltage, reverse connection protection 2. Processor and Storage Main control chip: Special 16-bit graphics / communication control chip Video memory: 128KB SRAM (display cache) Cache: 64KB battery-backed RAM (retains communication parameters) 3. External Interfaces CRT display interface: DB-15 pin (VGA analog RGB) Operation panel interface: 50-pin European terminal (keyboard / buttons) RS-232C interface: DB-25 pin (communication rate: 9600~19200bps) Battery interface: 3.6V lithium battery holder (keeps RAM data) Status LED: PWR (green), RUN (green), ALM (red) 4. Environmental Indicators Operating temperature: 0°C ~ +45°C Storage temperature: -20°C ~ +60°C Humidity: 10% ~ 80% RH (no condensation) Anti-vibration: 10~55Hz, ≤4.9m/s² Protection grade: IP20 (installed in control cabinet) IV. Typical Application Scenarios Yasnac J50 series CNC lathes / milling machines M-500 series machining centers Display and communication module i80 series old CNC systems Maintenance and replacement Signal acquisition and display driver for machine tool operation panel Adaptation of CRT to LCD display for control V. Comparison with Similar Series Models Table Model Type Resolution Communication Interface Compatible System JANCD-CG01 Basic Graphics / Communication Board Low Resolution Monochrome RS-232C J50/M-500 JANCD-CG20 Middle Resolution Graphics Board 640×480 Monochrome RS-232C J50/i80 JANCD-CG24 High Resolution Graphics Board 800×600 Color RS-232C + Ethernet J50 Enhanced Six. Common Faults and Diagnosis Black Screen with No Display Reason: 24V Power Supply Abnormal, CRT Interface Loose, Graphics Chip Damaged Check: PWR Light, Reinsert CRT Cable, Test Backplane Power Supply ALM Red Light Always On Reason: Bus Communication Failure, Main CPU (CP50) Fault, RAM Abnormal Check: Reinsert Board Cards, Replace Backup Battery, Check CP50 Status No Button Response Reason: Panel Interface Loose, I/O Circuit Damaged, Button Short Circuit Check: Check Panel Wiring, Test Interface Pins, Clean Interface Contacts Communication Failure Reason: RS-232C Chip Damaged, Baud Rate Mismatch, Cable Too Long Check: Replace Serial Port Chip, Verify Communication Parameters, Shorten Cable Length (≤3m) Yaskawa Seven. Associated Accessories Main CPU Board: JANCD-CP50 / CP50B Backplane: JANCD-BB50 (8 slots), JANCD-BB03 (14 slots) Servo Control Board: JANCD-SV50 / SV51 I/O Board: JANCD-IO50 Backup Battery: 3.6V Lithium Battery (CR2032 Compatible) Eight. Notes JANCD-CG01 is an early basic version with simplified functions, no color display and advanced graphics capabilities. It is mainly used for old equipment maintenance. If higher performance display is required, it can be upgraded to JANCD-CG20/CG24, but the compatibility of the backplane and system must be confirmed.