Yamaha PSR-E413 Service Manual page 32

PSR-E413
TEST No LCD display
20 SW Chk
020
21 A. LedChk
021
28 LCD On
028
29 LCD Off
029
31 PD1 Chk
031
33 PB Chk
033
37 MIDI Chk
037
41 Rom Chk2
041
42 Ram Chk2
042
45 FRomChk2
045
47 Factory
047
48 TestExit
048
•
Other Tests
Popping Noise Check
Connect the oscilloscope to the L/R of the [PHONES/OUTPUT] jack and turn on and then off the [STANDBY/ON] switch. Make
sure that popping noise level is 1.0 Vp-p or less, and that no abnormal sound or popping noise is output from the speakers.
Noise Level Check
Connect the level meter (with JIS-C fi lter) to the L/R of the [PHONES/OUTPUT] jack. (33 Ω load)
Set the [MASTER VOLUME] to the maximum level and check the noise level.
· PHONES L, R: –78 dBu or less
32
Test descriptions, judging conditions, etc.
Checks the switches and LEDs on the panel. Press the switches as shown in the LCD. When a switch
is pressed, a sound is played at the prescribed pitch. (Refer to the Switch Test Item List on the next
page.) When a switch with LED is turned on, the LED will light up.
Make sure that "SW OK" is displayed on the LCD when all the switches are pressed as indicated. For
the Dial item, make sure that "Up" is indicated when the encoder knob is turned clockwise, and "Dwn"
when turned counterclockwise. For the Knob item, make sure that "Lo" is indicated when the rotary knob
is turned fully counterclockwise, "Hi" when turned fully clockwise, and "C" when set to the center. To
cancel the operation halfway, press the lowest key (white key C1) to return to the item selection display.
Make sure that all the LEDs on the panel are turned on.
Make sure that all the dots on the LCD are turned on.
Make sure that all the dots on the LCD are turned off.
Connect a footswitch (FC-4 or FC-5) to the [SUSTAIN] jack.
Press the [START/STOP] button to start the test and check that C3 is played when the pedal is de-
pressed (ON), and C4 is played when the pedal is released (OFF).
Make sure that "PD1 OK" is displayed on the LCD.
C3 is played when the [PITCH BEND] wheel is turned toward you to the minimum position (DW),
and C4 is played when the wheel is turned away from you to the maximum position (UP).
Make sure that "PB OK" is displayed on the LCD.
Connect a PC which has installed the driver and main unit [USB] terminal with a USB cable. Set the
through mode on PC and execute the test.
Confi rm that the C4 note is output and "MIDI OK" is displayed on the LCD.
Checks the ROM connected to the CPU bus.
Make sure that "Rom OK" is displayed on the LCD.
It will take about 15 seconds for the check.
Checks the RAM connected to the CPU bus.
Make sure that "Ram OK" is displayed on the LCD.
Checks the FROM connected to the CPU bus.
Make sure that "FRom OK" is displayed on the LCD.
It will take about 30 seconds for the check.
Initializes the entire backup area to reset to the factory default.
"Fact" is displayed on the LCD during the test.
"Fact End" is displayed on the LCD when the test is fi nished.
This will leave the test program and change to the play mode.