Yamaha PSR-S750 Service Manual page 60

PSR-S750/PSR-S950
Test No. LCD display
28 028 : Pitch Bend Wheel Check
29 029 : Modulation Wheel Check
30 030 : Pedal 1 Check
31 031 : Pedal 2 Check
32 032 : MIDI Check
33 033 : USB to Device/Host Check
34 034 : USB Storage Device Check
35 035 : Keyboard Type Check
36 036 : ROM Check2
37 037 : RAM Check2
60
Test descriptions, judging conditions, etc.
Checking PITCH BEND.
When the test is started, " Pitch Bend Up 128
Set the [PITCH BEND] wheel to the maximum position and check that the G3 sound is pro-
duced and "
Pitch Bend Down 255
Set the [PITCH BEND] wheel to the minimum position and check that , the C3 sound is pro-
duced and " Pitch Bend Center 0
Set the [PITCH BEND] wheel to the center position and check that the C4 sound is produced
and " " is displayed.
OK 0
Checking MODULATION.
When the test is started, " Modulation Up
Set the [MODUCATION] wheel to the maximum position and check that the G3 sound is
produced and " Modulation Down 255
Set the [MODULATION] wheel to the minimum position and check that the C4 sound is pro-
duced and " OK 0 " is displayed.
Checking the Pedal 1.
Connect the foot controller (FC7) to the [FOOT PEDAL 1] jack.
When the pedal is set to the minimum and C3 is played. When the pedal is set to the maximum
and G3 is played.
Disconnect the foot controller from the [FOOT PEDAL 1] jack and C4 is played.
Check that "Pedal 1 Check OK" is displayed on the LCD when the test is completed.
Checking the Pedal 2.
Connect the foot controller (FC7) to the [FOOT PEDAL 2] jack.
When the pedal is set to the minimum and C3 is played. When the pedal is set to the maximum
and G3 is played.
Disconnect the foot controller from the [FOOT PEDAL 2] jack and C4 is played.
Check that "Pedal 2 Check OK" is displayed on the LCD when the test is completed.
Checking MIDI.
Connect the [MIDI IN] connector and [MIDI OUT] connector with a MIDI cable and then
execute the test.
Check that C4 is played and "MIDI Check OK" is displayed on the LCD.
Checking USB Device/Host.
Enter the test with the [START/STOP] button and "Connect Device – Host" will be shown
on the LCD.
Connect the USB cable to [USB TO DEVICE] and [USB TO HOST] terminals and check that
" Device – Host OK " is displayed and the C4 sound is produced.
Checking the USB Storage.
Insert the USB memory and press the [Start/Stop] button.
Check that "USB Storage Device Check OK
If no media is inserted, " NO DISK
If the media is unformatted, "
UNFORMAT DISK
If the media is protected, " PROTECT DISK
If failed in reading/writing, " NG
Checking Keyboard Type.
Check that "Keyboard Type Check OK (16M)" is displayed on the LCD.
Checking the ROM connected to the CPU bus. (Complete check)
Check that "ROM Check2 OK" is displayed on the LCD.
When the result is NG:
MAIN PROG ROM (IC22) NG
Checking the RAM connected to the CPU bus. (Complete check)
Check that "RAM Check2 OK" is displayed on the LCD.
When the result is NG:
MAIN SDRAM (IC11, 12)
" is displayed.
" is displayed.
" is displayed.
***" is displayed.
" is displayed.
" is displayed on the LCD.
" will be displayed.
" will be displayed.
" will be displayed.
" will be displayed.
NG