Yamaha YPT-220 매뉴얼 - 페이지 25

{카테고리_이름} Yamaha YPT-220에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Yamaha YPT-220 41 페이지. Yamaha psr-e223 (ypt-220) digital keyboard data list
Yamaha YPT-220에 대해서도 마찬가지입니다: 데이터 목록 (3 페이지)

페이지 인쇄

SYSTEM BOOTING FLOWCHART

Power On

Set CPU Register

Initialize Port

LCD EN = L

LCD RS = L

Starts accessing to internal

Initialize Work RAM

RAM

Turns ON the SoftPower

SoftPower = H

(IC101 117pin PF0)

If the power is turned off when

you release the power switch after

this stage, the SoftPower circuit

board (PNAM TR102 peripheral)

is defective

If the booting procedure does

not reach this stage, the CPU or

device around the CPU is defective

Starts accessing to LCD

Initialize LCD

Driver (IC301)

In case of no indication,

Opening indication

the LCD or LCD Driver

( "YAMAHA" )

(IC301) is defective

Starts keyboard scanning

Starts outputting signals from

B01–B11

* Turn on the power while holding down the

[C#2], [F2] and [G#2]

YES

Test Program ?

Test Program

( "TEST" ) indication

Test program routine

Sound can be played on the

keyboard

The keyboard is defective if it is

impossible to enter the test

Main screen

( "GrandPno" )

indication

Normal operation

PSR-E223/YPT-220