Sdram (Hga) Function Test - Yamaha AW-1600 Service Manual

AW1600
4-15 SDRAM (HGA) function test (15.SDRAM)
4-15-1 Display
*** 15. SDRAM
OK !
EXIT:[ENTER]
4-15-2 Test content
Check the HGA connections.
4-15-3 Procedures
This test is executed automatically.
If the test completes successfully:
The test menu screen reappears with " " displayed to the
left of the test item (15.SDRAM), and the cursor advances
to the next test item.
If the test fails or if you wish to cancel the test:
Press the [CANCEL] key. The test menu screen reappears
with "×" displayed to the left of the test item.
If there is any error, the error message is displayed on the
LCD.
4-15-4 Judgment
Display
"○" is displayed to the left of
the test item
"×" is displayed to the left of
the test item
"HGA-SDRAM (Check CPU ->
HGA -> SDRAM)" is displayed
during the test.
"IDE(HDD)-HGA-SDRAM
(Check IDE -> HGA ->
SDRAM)" is displayed during
the test.
62
***
Judgment
The test completes
successfully.
The test fails or is canceled.
Connection error between
CPU (IC002 on the MAIN
circuit board) → HGA (IC313
on the MAIN circuit board) →
SDRAM (IC306 and IC307 on
the MAIN circuit board).
Connection error between the
internal hard disk drive →
HGA (IC313 on the MAIN
circuit board) → SDRAM
(IC306 and IC307 on the MAIN
circuit board).