Advertisement
*
General I²C error means: no I²C device is responding to the particular I²C bus.
Possible causes: SCL short circuit to GND, SDA short circuit to GND, SCL short
circuit to SDA, SDA open circuit (at IC 7600), SCL open circuit (at IC 7600)
Reading Error Codes
Error codes are displayed in the following ways:
1. By SDM display or CSM display
2. By blinking Power LED
1. If the on screen display is working, enter SDM or CSM and read the error buffer display.
2. If the on screen display is not working, do the following:
a. Remove ac power
b. Use a jumper to connect pin 0224 to pin 0228 at IC 7601 (D-3)
c. Apply ac power; read the error codes (see LED Sequence List below)
d. If there is no LED indication, take the following steps as needed:
Power on
Press 0–6–2–5–9–6–Menu on the remote control
Note: Some indications take 30 seconds or longer to appear on the LED.
3. LED Sequence List:
a. Wait for long LED on (1.5 seconds)
b. Count the following on flashes (individual errors are separated by 1.5 seconds LED off)
Example:
Start
4. Displayed error codes are saved by removing the ac power. Displayed error codes are erased by
pressing the power button on the remote control or local keyboard.
(
3
)
(
2
)
Start
Advertisement
