Test 3 - Function: Simplified Check Of Rom; Test 4 - Function: Simplified Check Of Ram - Yamaha TYROS4 Service Manual

Test 3
Function: Simplifi ed check of ROM
Description:
Executes Read test (checksum test) of ROM.
Executes Write pin check of Program Flash ROM as well.
Displayed Message:
００３：ＲＯＭ Ｃｈｅｃｋ１
００３：ＲＯＭ Ｃｈｅｃｋ１
ＯＫ
００３：ＲＯＭ Ｃｈｅｃｋ１
ＭＡＩＮ ＰＲＯＧ ＲＯＭ （ＩＣ１６ ） ＮＧ
ＭＡＩＮ ＤＡＴＡ ＲＯＭ （ＩＣ１９ ） ＮＧ
ＳＳＰ１ ＰＲＯＧ ＲＯＭ （ＩＣ９０４） ＮＧ
ＭＡＩＮ ＰＲＯＧ ＷＲ （ＩＣ１６ ） ＮＧ
Supplement:
In case of NG, the location and the IC number of which NG is
detected will be shown.
"No Dev." will be shown if SSP1 PROG is not detected.
Circuit
Error Indications
Board
MAIN PROG ROM NG
DM
MAIN PROG WR NG
MAIN DATA ROM NG DM
SSP1 PROG ROM NG
DM
SSP1 PROG ROM No Dev.
Selected screen
In case of OK
In case of NG (Example)
Location Name in Circuit Diagram
IC16 FLASH ROM 256 M PROGRAM
IC19 FLASH ROM 512 M DATA
IC904 FLASH ROM 16 M SSP1-PROGRAM
Test 4
Function: Simplifi ed check of RAM
Description:
Executes Read/Write test (connection check) of RAM.
Displayed Message:
００４：ＲＡＭ Ｃｈｅｃｋ１
００４：ＲＡＭ Ｃｈｅｃｋ１
ＯＫ
００４：ＲＡＭ Ｃｈｅｃｋ１
ＭＡＩＮ ＳＤＲＡＭ （ＩＣ２０１． ２０２． ２０３． ２０４） ＮＧ
ＳＳＰ１ ＳＲＡＭ （ＩＣ９０５） ＮＧ
Supplement:
In case of NG, the location and the IC number of which NG is
detected will be shown.
If sound board is not recognized, "No Dev." will be shown
for SSP1 SRAM.
Circuit
Error Indications Board Location
MAIN SDRAM NG DM
SSP1 SRAM NG
DM
SSP1 SRAM No Dev.
Tyros4
Selected screen
In case of OK
In case of NG
Name in Circuit Diagram
IC201 SDRAM 128 M
-204 SDRAM 128 M
IC905 SRAM 4 M
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