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Brother HL-1660e Series User Manual page 101

Service manual
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6.2 DRAM Test
(1) To start up the test program:
While pressing the
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:
RAM address
The following table is the reference.
Table 6.1 Video Controller DRAM Address Corresponding Table
Lower order address
2, 6, A, E
*1: Replace the DRAM on the Main PCB.
*2: Replace the SIMM.
Note1:
the
bride or ineffective
Note2:
disappear in
not a trouble.
Switch (RESET switch), turn the power on. "DRAM CHECK" will be
Address
0, 4, 8, C
There may be the case that the above sequence doesn't work correctly according to
contents of RAM failure, or in faulty assembly such as soldering
"PRINT CHECK" may be displayed when getting out from TEST mode. It will
WRITE data
Part replacement
#32, 21
#16, 17
Replace with SIMM
corresponding to
memory map.
soldering etc.
20 or 30 seconds, displaying "READY" on LCD. It is
VI - 25
READ data
*1
*2

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