Test Program - Yamaha S03 Service Manual

S03

TEST PROGRAM

(A) TEST PROGRAM LIST
TEST No. TEST NAME
1 RAM Battery
2 LCD
3 Panel Switch & LED
4 1Key On
5 Keyboard
6 Pitch Bend
7 Modulation Wheel
8 Foot Controller
9 Foot Switch
10 MIDI IN/OUT/THRU
11 HOST SELECT
12 TO HOST
13 OUTPUT L
14 OUTPUT R
20 RAM(SRAM)
21 ROM(ProgramROM)
22 Wave ROM
23 Factory Set
24 Exit
(B) PREPARATION
The following measuring instruments and jigs are required to test the
unit.
Measuring instruments:
Frequency counter, oscilloscope, AC voltmeter (JIS-C curve),
distortion gauge (Flat), keyboard amplifier etc.
Jigs: MIDI cable, expansion board, HOST test jig etc.
(C) HOW TO ENTER THE TEST PROGRAM
Hold down buttons [1], [2], and [3] while turning on the power. The
unit comes on, and the following screen appears briefly on the LCD.
Test Mode
After a while the display changes to the following. When you see this
screen, you can begin to select and execute tests as described in
"Proceeding Through the Tests" below.
01: BATTERY
(D) PROCEEDING THROUGH THE TESTS
The test program begins by displaying the following.
01: BATTERY
You can now select and execute tests using the [DEC/NO], [INC/YES],
[ENTER], and [EXIT] buttons.
28
v#.##
Press [INC/YES] to select and display the name of the next test in the
test list.
Press [DEC/NO] to select and display the name of the preceding test
in the test list.
Press [ENTER] to start execution of the selected test.
Press [EXIT] to return to the test selection process (when a test result
is shown on the screen) or to close the program (when at the test
selection process).
(E) TEST SELECTION WHEN AN ERROR IS DETECTED
If the test returns an error, you can carry out error processing and
move on to another test as follows.
• If the test returns an error, the screen displays the error condition and
the test terminates. Press [EXIT] to carry out error processing. You
can then select and execute another test as described above (using
[INC/YES or [DEC/NO] to select the test, and [ENTER] to execute).
1. RAM Battery
01: BATTERY
This test checks that the RAM backup battery voltage is more than
2.7V. The LCD displays the result (OK or NG), and the test terminates.
(Judgment result display)
OK 01: BATTERY
NG
01: BATTERY
Note: Please wait at least 20 seconds after power-on before executing
this test, as it takes the voltage a certain amount of time to
stabilize.
2. LCD
02: LCD
Visually check that all dots on the LCD blink ON/OFF (black/white).
After completing the check, press [EXIT] to terminate the test.
3. Panel Switch & LED
03: SW LED
OK
NG