Hello to all. I am new here and came as I need some help. I am HI FI and music fun , not an expert for repair. My Quad haas gone to protection mode and nobody can help me in my country. Sometimes it works , sometimes is in protection for a day or two. Thanks
Bạn thử kiểm tra xem có mối hàn nào nó nứt không, nếu bạn tự hàn lại nếu có thể tự làm được vì lỗi bạn mô tả mời gọi nó bị như vậy nên có thể là lỗi làm mối hàn nứt nó gây ra
Please write in English. We have been asking this many times.
Try checking to see if any of the solder joints are cracked, if you can re-solder them yourself because the error you described invited it to do so it could be the defect that caused the cracked solder joints.
Many thanks Nguyenha. We have made all measurements in working mode and protection mode. There is no difference. All seems to be ok .
Try to plug and unplug all the connectors inside amp (on the pcb) several times. Sometimes intermittent fault is due to bad contact between plug and socket.
You can find the schematic on Elektrotanya and elsewhrere.
https://elektrotanya.com/quad_909_sm.pdf/download.html
https://elektrotanya.com/quad-909_sch.pdf/download.html
https://elektrotanya.com/quad_909_sm.pdf/download.html
https://elektrotanya.com/quad-909_sch.pdf/download.html