Lexmark C782 Service Manual - Page 196

5061 Serial Wrap Test Use this test to check the operation of the Serial Port Hardware using a wrap plug. Each signal is tested. To run the Serial Wrap Test: 1. Disconnect the serial interface cable, and install the wrap plug. 2. Select the appropriate Serial Wrap Test from HARDWARE TESTS in the Diagnostics mode. Values include Serial Wrap, Serial 1 Wrap, Serial 2 Wrap, or Serial 3 Wrap. P and F represent the same numbers for DRAM. The power indicator blinks, indicating the test is running. 3. This test runs continuously unless canceled by pressing Back ( ) or Stop ( ). Each time the test finishes, the screen updates with the result. If the test passes, the Pass Count increases by 1. However, if the test fails, one of the following failure messages appears for approximately three seconds, and the Fail Count increases by 1: Receive Status Interrupt Error Status Error Receive Data Interrupt Error Transmit Data Interrupt Error Transmit Empty Error Threshold Error Receive Data Ready Error Break Interrupt Error Framing Error Parity Error Overrun Error Data Error Data 232 Error Data 422 Error FIFO Error DSR Error DSR PIO Error DSR Interrupt Error CTS Error CTS PIO Error CTS Interrupt Error Once the maximum count is reached, the test stops. The power indicator goes on solid and the final results are displayed. Press Back ( ) or Stop ( ) to exit the test. 3-18 Service Manual