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CROWN MACROTECH 5002


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#1 SAJ

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Posted 14 December 2010 - 09:36 PM

I am working on a Crown 5002.
The power supply voltage on ch 1 does not switch from low to high. The problem is on the Main Input board. i tried another board and everything worked perfect. Does anyone have any suggestions?
Thanks.

#2 Kip Whitehead

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Posted 15 December 2010 - 10:57 AM

QUOTE(SAJ @ Dec 14 2010, 09:36 PM) View Post
I am working on a Crown 5002.
The power supply voltage on ch 1 does not switch from low to high. The problem is on the Main Input board. i tried another board and everything worked perfect. Does anyone have any suggestions?
Thanks.



Can you give me the part number of your Main board? The switching happens on the control board and want to make sure it's not the control board. Typically if it's locked low you have an open resistor like R708 for channel 1 or the 555 timer is bad.

This switching is also driven by ODEp. As your ODEP voltage drops it will take the amp out of VZ and back into it's low state. Is your ODEP voltages good?

Thanks,

Kip Whitehead
Crown Technical Support

#3 SAJ

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Posted 21 December 2010 - 11:58 AM

The main board numbers are  S10612,  125903-7, 54290a



QUOTE(Kip Whitehead @ Dec 15 2010, 11:57 AM) View Post
QUOTE(SAJ @ Dec 14 2010, 09:36 PM) View Post
I am working on a Crown 5002.
The power supply voltage on ch 1 does not switch from low to high. The problem is on the Main Input board. i tried another board and everything worked perfect. Does anyone have any suggestions?
Thanks.



Can you give me the part number of your Main board? The switching happens on the control board and want to make sure it's not the control board. Typically if it's locked low you have an open resistor like R708 for channel 1 or the 555 timer is bad.

This switching is also driven by ODEp. As your ODEP voltage drops it will take the amp out of VZ and back into it's low state. Is your ODEP voltages good?

Thanks,

Kip Whitehead
Crown Technical Support



#4 SAJ

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Posted 21 December 2010 - 10:39 PM

Kip,
    Can you please email me the the odepp section and the expected voltages.
thanks.
QUOTE(SAJ @ Dec 21 2010, 12:58 PM) View Post
The main board numbers are  S10612,  125903-7, 54290a



QUOTE(Kip Whitehead @ Dec 15 2010, 11:57 AM) View Post
QUOTE(SAJ @ Dec 14 2010, 09:36 PM) View Post
I am working on a Crown 5002.
The power supply voltage on ch 1 does not switch from low to high. The problem is on the Main Input board. i tried another board and everything worked perfect. Does anyone have any suggestions?
Thanks.



Can you give me the part number of your Main board? The switching happens on the control board and want to make sure it's not the control board. Typically if it's locked low you have an open resistor like R708 for channel 1 or the 555 timer is bad.

This switching is also driven by ODEp. As your ODEP voltage drops it will take the amp out of VZ and back into it's low state. Is your ODEP voltages good?

Thanks,

Kip Whitehead
Crown Technical Support




#5 SAJ

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Posted 22 December 2010 - 04:18 PM

Can you please email me the complete service manual for the 5002.     skyhigher888@yahoo.com
Thanks.    

QUOTE(SAJ @ Dec 21 2010, 11:39 PM) View Post
Kip,
    Can you please email me the the odepp section and the expected voltages.
thanks.
QUOTE(SAJ @ Dec 21 2010, 12:58 PM) View Post
The main board numbers are  S10612,  125903-7, 54290a



QUOTE(Kip Whitehead @ Dec 15 2010, 11:57 AM) View Post
QUOTE(SAJ @ Dec 14 2010, 09:36 PM) View Post
I am working on a Crown 5002.
The power supply voltage on ch 1 does not switch from low to high. The problem is on the Main Input board. i tried another board and everything worked perfect. Does anyone have any suggestions?
Thanks.



Can you give me the part number of your Main board? The switching happens on the control board and want to make sure it's not the control board. Typically if it's locked low you have an open resistor like R708 for channel 1 or the 555 timer is bad.

This switching is also driven by ODEp. As your ODEP voltage drops it will take the amp out of VZ and back into it's low state. Is your ODEP voltages good?

Thanks,

Kip Whitehead
Crown Technical Support





#6 SAJ

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Posted 22 December 2010 - 08:53 PM

I changed all the ics, check all transiistors and resistors and diodes. Could it be a resistor i missed?


QUOTE(SAJ @ Dec 22 2010, 05:18 PM) View Post
Can you please email me the complete service manual for the 5002.     skyhigher888@yahoo.com
Thanks.    

QUOTE(SAJ @ Dec 21 2010, 11:39 PM) View Post
Kip,
    Can you please email me the the odepp section and the expected voltages.
thanks.
QUOTE(SAJ @ Dec 21 2010, 12:58 PM) View Post
The main board numbers are  S10612,  125903-7, 54290a



QUOTE(Kip Whitehead @ Dec 15 2010, 11:57 AM) View Post
QUOTE(SAJ @ Dec 14 2010, 09:36 PM) View Post
I am working on a Crown 5002.
The power supply voltage on ch 1 does not switch from low to high. The problem is on the Main Input board. i tried another board and everything worked perfect. Does anyone have any suggestions?
Thanks.



Can you give me the part number of your Main board? The switching happens on the control board and want to make sure it's not the control board. Typically if it's locked low you have an open resistor like R708 for channel 1 or the 555 timer is bad.

This switching is also driven by ODEp. As your ODEP voltage drops it will take the amp out of VZ and back into it's low state. Is your ODEP voltages good?

Thanks,

Kip Whitehead
Crown Technical Support