Yamaha PortaTone PSR-350 Service Manual - Page 20
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PSR-350
TEST No.
LCD (initial)
020SW Chk
20
021LED On
21
28
028LCD On
029LCD Off
29
031PD1 Chk
31
037MIDI Chk
37
040Battery
40
041Rom Chk2
41
042Ram Chk2
42
043WRomChk2
43
044WRamChk2
44
46
046BackUp 2
47
047Factory
048TestExit
48
* NOTE : The above tests Nos. 41-46, require approximately 25 minutes to conduct.
If the time is not available to perform the tests, proceed the test No.47 by pressing several the [+/YES] button.
26
Test Functions and Judgment Criteria
Check the switches on the panel.
Press the switches on the LCD as instructed. A pre-assigned note is output when the
switch is pressed. (See table 1.) As the check result appears on the LCD when all the
switches are pressed as instructed,. Check that OK is displayed. (To stop this check
before reaching its end, press the lowest (leftmost) white key on the keyboard to return
to the test item name on display.
Check that the all LEDs on the panel are on.
Check that all LCD dots are on.
Check that all LCD dots are off.
Connect the foot switch (FC-4 or FC-5) to the [FOOT SWITCH] jack.
Check that the C3 note is output when the [START/STOP] button is pressed while
stepping the pedal and the C4 note is output when releasing the pedal. The sound stops
when stepping the pedal again.
After connecting the [MIDI IN] jack and [MIDI OUT] jack with a MIDI cable, execute
the test.
Check that the C4 note is output and that the test results appear on the LCD.
Removing the AC adapter sets to the Battery Check mode. (In advance, install the
batteries.) The A/D value of the battery is detected and displayed with hexadecimal
number on the LCD.
Checks the ROMs that are connected to the CPU.
The test results appear on the LCD.
Checks the RAMs that are connected to the CPU.
The test results appear on the LCD.
Checks the WAVE ROM.
The test results appear on the LCD.
Checks the WAVE RAM.
The test results appear on the LCD.
Performs the RAM back-up check.
Check that the display reads "NG," then turn off the power switch. (A time of the
beginnings surely becoms NG.)
Enter the test program and perform the RAM back-up checks, then check again.
Check that the LCD displays "OK."
All the RAMs are initialized and set to the factory preset data when executing this test.
Exit from the test program after executing this test.