Yamaha AW-2400 Service Manual page 81

4-15 SDRAM (HGA) function test (15 SDRAM)
*** 15. SDRAM
OK !
EXIT : [ENTER]
4-15-1 Test Contents
Connection Test relevant to HGA
4-15-2 Testing procedure
Automatically performed and it is not necessary to operate.
4-15-3 Judgment
(1) If normal:
The screen returns to the testing item indication, "™" is
displayed at the left end of testing item indicating area,
and the cursor moves to the next testing item.
(2) If the test result is NG or you wish to cancel the test:
Press the [CANCEL] key to return to the testing item
indication screen. At this time, "×" is shown at the left end
of testing item indicating area.
If there is any abnormality, error messages are displayed
in the message indication area.
(3) If "HGA - SDRAM ( Check CPU -> HGA -> SDRAM
)" is displayed during the test:
Connection malfunction between CPU (IC002, MAIN
P.C.B.) → HGA (IC313, MAIN P.C.B.) → SDRAM
(IC306, IC307, MAIN P.C.B.)
(4) If "IDE (HDD) - HGA - SDRAM ( Check IDE -
> HGA-> SDRAM" is displayed during the test:
Connection malfunction between internal HDD → HGA
(IC313, MAIN P.C.B.) → SDRAM (IC306, IC307, MAIN
P.C.B.)
4-16 SLOT Function Test (16 SLOT)
*** 16. SLOT
OK : DATABUS
OK : ADDRESSBUS
OK : CON OK : IRQ
OK : ANALOG
OK : CLOCK
EXIT : [ENTER]
4-16-1 Test Contents
Checks I/O and power supply voltage of SLOT.
***
***
OK : SCI
WCK: Clock check at WCK MSWCLK INT.48k
SIO: SIO check between DSP7 and MY-SLOT (MUTE
OFF/ON)
Input/Output CH is connected to DSP with 4 ch/
line (16 CH)
/CON: /CON signal input check (Hi/Lo)
COM: Loop back check of Tx, Rx (CPU)
Sends/Receives 4 bytes of 00h, 55h, Aah, FFh at
38.4 kBPS
FS: Check of various FS, SYNC (48 kHz)
ADDRESS: Check of address bus A [1]...A [10]
DATA: Check of data bus D [0]...D [15]
IRQ: /IRQ signal input check (Hi/Lo)
POWER: Voltage check of +20 V, +15 VA, +5 VA, +5 V, +3.3
V, –5 VA, –15 VA
4-16-2 Testing procedure
Automatically performed and it is not necessary to operate.
4-16-3 Judgment
(1) If normal:
The screen returns to the testing item indication, "™" is
displayed at the left end of testing item indicating area,
and the cursor moves to the next testing item.
(2) If the test result is NG or you wish to cancel the test:
Press the [CANCEL] key to return to the testing item
indication screen. At this time, "×" is shown at the left end
of testing item indicating area.
If there is any abnormality, error messages are displayed
in the message indication area.
(3) If "NG:DATABUS D x" is displayed during the test:
Malfunction of DATABUS x
(4) If "NG:ADDRESSBUS A x" is displayed during the test:
Malfunction of ADDRESSBUS x
(5) If "NG:IRQ" is displayed during the test:
Malfunction of IRQ
(6) If "NG:CON" is displayed during the test:
Malfunction of CONNECTION
(7) If "NG:ANALOG x - y" is displayed during the test:
Abnormality of y (Low or High) of x (voltage)
(8) If "NG:SCI" is displayed during the test:
Abnormality in serial
(9) If "NG:CLOCK x" is displayed during the test:
Abnormality of x
FSM, SYNCM, 64FSM, 128FSM, 256FSM, MS256,
MSSYNC, or MSWCLK can be applied to "x".
AW2400
81