I have two different editions beosound 9000 with problems,
both did not read cds, I changed the laser mechanism in the first one and now it shows the following
the change was not successful, it goes to the number of the CD that I choose,
it starts to turn but vice versa (anti clockwise )and the display says load
I also removed a gray connector p9 that went from the power supply to the motor control unit and put it back in.
Now the standby LED doesn't light up and it doesn't even go into test mode.
the radio and the rest work normally.
it is connected to its speakers beolab 8000 and the remote control works.
the second one mk1 had a problem with its power supply the 9 and -12 volts failed I changed the ic100 dual mosfet WAS SHORT and the resistor r157 33R OPEN and the IC3 LM3578 THE voltages came in and then I found a short circuited zener diode d64 15volt in 9volt rail.
which I changed now it opens normally, but in the mode of the cd, when it gives an order to play , the voltage of 9 volts begins and drops and the device goes to standby, does anyone have experience with this I want to see if the problem is in the power supply or in the mechanism of the SD
it is connected to its speakers beolab 8000 and the remote control works.
no standbuy led and it doesn't enter state test
mode
any help would be greatly appreciated
both did not read cds, I changed the laser mechanism in the first one and now it shows the following
the change was not successful, it goes to the number of the CD that I choose,
it starts to turn but vice versa (anti clockwise )and the display says load
I also removed a gray connector p9 that went from the power supply to the motor control unit and put it back in.
Now the standby LED doesn't light up and it doesn't even go into test mode.
the radio and the rest work normally.
it is connected to its speakers beolab 8000 and the remote control works.
the second one mk1 had a problem with its power supply the 9 and -12 volts failed I changed the ic100 dual mosfet WAS SHORT and the resistor r157 33R OPEN and the IC3 LM3578 THE voltages came in and then I found a short circuited zener diode d64 15volt in 9volt rail.
which I changed now it opens normally, but in the mode of the cd, when it gives an order to play , the voltage of 9 volts begins and drops and the device goes to standby, does anyone have experience with this I want to see if the problem is in the power supply or in the mechanism of the SD
it is connected to its speakers beolab 8000 and the remote control works.
no standbuy led and it doesn't enter state test
mode
any help would be greatly appreciated
Last edited by a moderator:
Hi Chpetri2024.
First, glad your found your way to the forum and welcome here!
You would have better chances to have answers if you post one or two thread in dedicated subsection of forum:
For your cd issue i would try digital source and psu in analog source.
You could ask a moderator to move your message, contact them and ask, they are very friendly ime.
Could you too introduce yourself briefly, it's always nice and give a proof your not a soulless robot! 😉
Anyway, enjoy your membership!
First, glad your found your way to the forum and welcome here!
You would have better chances to have answers if you post one or two thread in dedicated subsection of forum:
For your cd issue i would try digital source and psu in analog source.
You could ask a moderator to move your message, contact them and ask, they are very friendly ime.
Could you too introduce yourself briefly, it's always nice and give a proof your not a soulless robot! 😉
Anyway, enjoy your membership!
Last edited:
Update ,
After reading the entire service manual I found that the IC 100 has to do with the voltages 12 volts and 9 V and not with the voltage -12 volts also the schematic is wrong against the IC IS9958 which is a double mosfet type one n and one p cannot be used here so use integrated IS9948 which is dual mosfet type p so the polarities of capacitors and diode are also wrong in the schematic diagram.
what a mess
After reading the entire service manual I found that the IC 100 has to do with the voltages 12 volts and 9 V and not with the voltage -12 volts also the schematic is wrong against the IC IS9958 which is a double mosfet type one n and one p cannot be used here so use integrated IS9948 which is dual mosfet type p so the polarities of capacitors and diode are also wrong in the schematic diagram.
what a mess