JVC 250 - Manual (Page 59)

Chapter 5---Electronics
5-4 Model 250 Service Manual
! I/O control for VIC selection
! Two RS-232 serial interface ports
! Infrared (IR) remote control interface. Accepts input from front or rear IR
detectors.
! External 3 color system status LEDs. Green indicates normal, yellow is
standby and red indicates a fault condition.
! External Service Mode Switch. Pressing this switch during a power-up
sequence brings the system up in a diagnostic mode (for maintenance)
rather than a normal operating mode.
Figure 5-3 Rear of Electronics Module with rear cover and panel removed.