Yamaha PORTATONE KB-280 Service Manual page 27

Test No. LCD display
9 SW Chk
020
A. LedChk
10
021
11 LCD On
028
12 LCD Off
029
PD1 Chk
13
031
14 PB Chk
033
15 Exp Chk
035
MIDI Chk
16
037
17 Rom Chk2
041
Ram Chk2
18
042
19 FRomChk2
045
Factory
20
047
TestExit
21
048
Test descriptions, judging conditions, etc.
Checks 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.
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.
Make sure that C3 is played when the [START/STOP] button is pressed while the pedal is
depressed (On), and that C4 is played when the pedal is released (Off). The sound will stop
when the pedal is depressed again.
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 the Exp pedal to the [Exp. PEDAL] jack.
Press the [START/STOP] button to start the test and make sure that C3 is played when the
pedal is depressed (On), and that C4 is played when the pedal is released (Off).
Make sure that "Exp OK" is displayed on the LCD.
Connect the [MIDI IN] terminal and [MIDI OUT] terminal with a MIDI cable and then execute
the test.
Make sure that C4 is played and that "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 25 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 finished.
This will leave the test program and change to the play mode.
KB-280
27