Dell 5110cn Color Laser Printer Service Manual - Page 191

4.1.7 MAC+PHY Test PHY Internal loopback test Normal CHECK OK Chapter 2 Operation of Diag. Error MAC+PHY ERROR 4.1.8 ASIC Test ASIC register check. Normal CHECK OK Error ERROR 4.1.9 PANEL Test This test checks input and output of the control panel. When buttons are pressed in the manner shown in the following table, the test displays the corresponding contents on the LED and LCD. Button LED LCD „„ Displays " UP " on the LCD. „„ Displays " DOWN " on the LCD. „† Displays " LEFT " on the LCD. „† Displays " RIGHT " on the LCD. 3 †„ Displays " SET " on the LCD. MENU †„ Displays " MENU " on the LCD. CANCEL †† Displays " CANCEL " on the LCD. pressed at the same time - (The test is completed) Displays " Start " on the LCD. †† Indicates left side square is the Ready LED (Green) and right side square is the Alarm LED (Amber). †Not lighting „Lighting 4.1.10 IOT Test This test checks communication with the IOT. Then it reads the status register of the IOT to check whether commands can be exchanged with the IOT. It sends the following command to read the status register, and checks whther the appropriate response returns. Read ROM Revision No Normal CHECK OK Error IOT ERROR 4.1.11 HD Test When the optional hard disk is checked and found, it checks the optional hard disk. The test performs read/write/verify on the hard disk. Normal CHECK OK Error HD ERROR 2 - 13