Repair and disassembly guides for electronic keyboards.

85 질문 전체 보기

LCD Backlight don't work

Hi I have a Yamaha PSR-A2000 keyboard and the LCD backlight is off, the LCD is working perfectly and the screen has no cracks or bumps. It's just that the backlight is not working anymore. Any advise

답변되었습니다! View the answer 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

점수 1
의견 추가하세요

US$100 이상 또는 Pro Tech Toolkit을 포함한 모든 주문의 배송은 무료입니다!

상점 둘러보기

1개의 답변

선택된 해법


Here is a link to the service manual for your keyboard. It contains complete circuit wiring diagrams. As best as I can see, the LCD display backlight is fed by a +5V DC supply connection. Looking at the circuit there appears to be two (2) cable connections to the display. One is for data and screen settings (which has 19 wires) and the other is a two wire cable supplying the backlight (+5V and Eth).

There is a link connection JC1.0 where +5VD1 connects to +5VD2. It is +5VD2 that is the designated supply for the backlight. (shown on PSR-A2000 OVERALL CIRCUIT DIAGRAM 1/6 (DML 1/2) at point C2)

Here are images to show the salient points.

Block Image

Block Image

Block Image

It may be that the +5V is missing due to a faulty connection, the Eth is missing for the same reason or that the backlight itself may be faulty.

Hopefully this is of some help.

해당 답변은 도움이 되었습니까?

점수 2
의견 추가하세요

귀하의 답변을 추가하십시오

Sam Ofy 가/이 대단히 고마워 할 것입니다.
조회 통계:

지난 24시간: 0

지난 7일: 3

지난 30일: 7

전체 시간: 361