VI-25
6.2 DRAM
Test
(1)
To start up the test program:
While pressing the Switch (RESET switch), turn the power on.
"DRAM CHECK" will be displayed. Then press CONTINUE switch to start DRAM
checking.
(2)
The LCD will display "START DRAM TEST" and the DATA lamp or ALARM lamp
will be flashing.
(3)
On satisfactory completion of all the RAM test, the LCD will display:
"DRAM OK!!".
(4)
If any DRAM has an error, the LCD will display:
Ç
Ç
Ç
RAM address
WRITE data READ data
(5)
Enter the hidden menu mode as follows to confirm the current memory map;
i) Press the Form Feed, Mode and Continue buttons at the same time in the off-
line status.
ii) The LCD will display “HIDDEN PANEL”
iii) Select the “DRAM ADDRESS” menu using the scroll buttons.
iv) Whenever the Set button is pressed, the LCD will display the DRAM error
address on the Main PCB, Slot 1 and Slot 2 in turn.
(6)
If a SIMM DRAM has an error, replace the SIMM corresponding to the above
memory map information.
If the DRAM on the Main PCB has an error, replace referring to the table below;
Table 6.1 Video Controller DRAM Address Corresponding Table
Lower order address
DRAM chip to be replaced
0, 4, 8, C
1, 5, 9, D
#30, 31
*1
2, 6, A, E
3, 7, B, F
#16, 17
*1: Replace the DRAM on the Main PCB.
Note1: There may be the case that the above sequence doesn’t work correctly
according to the contents of RAM failure, or in faulty assembly such as
soldering bride or ineffective soldering etc.
Note2: "PRINT CHECK" may be displayed when getting out from TEST mode. It will
disappear in 20 or 30 seconds, displaying "READY" on LCD. It is not a trouble.
Æ
Summary of Contents for HL-2060
Page 1: ...MECHANICS ELECTRONICS SERVICE MANUAL LASER PRINTER ...
Page 41: ...III 8 A B F C D E 1 E 2 E 3 E 4 E 5 F Figure 3 7 Paper Feed Size SW PCB Circuit ...
Page 129: ...VII 16 Test for memory MEMORY DISPLAY MEMORY DEBUG MEMORY TEST exit MENU ...
Page 137: ...Appendix A 3 Main PCB Circuitry Diagram 1 7 CODE UK4058000 B512006 CIR 1 7 NAME A 3 ...
Page 138: ...Appendix A 4 Main PCB Circuitry Diagram 2 7 CODE UK4058000 B512006 CIR 2 7 NAME A 4 ...
Page 139: ...Appendix A 5 Main PCB Circuitry Diagram 3 7 CODE UK4058000 B512006 CIR 3 7 NAME A 5 ...
Page 140: ...Appendix A 6 Main PCB Circuitry Diagram 4 7 CODE UK4058000 B512006 CIR 4 7 NAME A 6 ...
Page 141: ...Appendix A 7 Main PCB Circuitry Diagram 5 7 CODE UK4058000 B512006 CIR 5 7 NAME A 7 ...
Page 142: ...Appendix A 8 Main PCB Circuitry Diagram 6 7 CODE UK4058000 B512006 CIR 6 7 NAME A 8 ...
Page 143: ...Appendix A 9 Main PCB Circuitry Diagram 7 7 CODE UK4058000 B512006 CIR 7 7 NAME A 9 ...
Page 144: ...Appendix A 10 Control Panel PCB Circuitry Diagram 1 1 CODE UK4077000 B512005 CIR NAME A 10 ...
Page 145: ...Appendix A 11 Laser LD PCB Circuitry Diagram 1 1 CODE UK3253000 B48K253 CIR NAME A 11 ...
Page 147: ...June 98 54T046NE0 HL2060 ...
