Re: Element ELCHW402 - Screen Does Not Turn On
Will do Dick....
jjl4999
Member
Last Activity: 07-22-2017, 10:47 AM
Joined: 03-10-2017
Location: LA
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Re: Element ELCHW402 - Screen Does Not Turn On
I measured 24.7 volts out to the inverter board across all terminals labeled 24V on the connector....Leave a comment:
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Re: Element ELCHW402 - Screen Does Not Turn On
I purchased two like kind replacement capacitors and recorded the following results:
C812 measured 4.48 uF out of circuit.
C811 measured 4.75 uF out of circuit.
Both new capacitors measured 11 uF out of circuit.
I installed the new capacitors at C811 and C812 and first plugged the 1K resistor connecting Standby and 5Vs. I was able to measure around 13V on N811 pin 12 and around 10 V on N811 pin 12, all referenced to negative of C810. Voltages were in the acceptable range listed in Dick's document....Leave a comment:
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Re: Element ELCHW402 - Screen Does Not Turn On
Thanks Dick. I plan to go by an electronic shop and pick up some replacement capacitors. I'll replace and post results tomorrow.Leave a comment:
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Re: Element ELCHW402 - Screen Does Not Turn On
I measured the devices in question and measured:
C812: 16 uF in circuit. Discharged capacitor and read resistance. Capacitor read ohms for a second or two then reads open.
C811: 16uF in circuit. Discharged capacitor and read resistance. Capacitor read ohms for a second or two then reads open.
VZ831: meter in diode mode. Forward voltage: .53V
Reverse voltage: 2.7V
VD814: meter in diode mode. Forward voltage: .53V
Reverse voltage: 2.8V
VD813: meter in diode mode. Forward voltage: .52V...Leave a comment:
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Re: Element ELCHW402 - Screen Does Not Turn On
BUDM / RJ - Thanks for the knowledge and advice. The following readings use the negative side of C810 as reference:
N831
Pin 12: 8V
Pin 16: 8V
VD831
Anode: 8V
Cathode: 8V
C838 Plus Side: 8 VLeave a comment:
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Re: Element ELCHW402 - Screen Does Not Turn On
The meter may be running low. It isn't a high end meter, TackLife Brand.
I plugged all of the boards back in to take measurements below:
N831
Pin 12: 61V
Pin 16: 0 V
VD831
Anode: 61V
Cathode: 0V
C838 Plus Side: 61 V
C842 - I originally thought it was that capacitor as it seems to be a common failure. It measures approximately 51 nF in circuit.
Thanks again for the help. I can't figure out why Pin 12 has...Leave a comment:
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Re: Element ELCHW402 - Screen Does Not Turn On
Thanks for the post RJ.
The relay does click when I plug it but I do not get the 12 V. With 1K resistor still between STB and 5V_S:
C810 = 220 VDC
C808 = 140 VDC...Leave a comment:
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Re: Element ELCHW402 - Screen Does Not Turn On
1 k resistor between STB and 5V_S
STB = 2.7 V
5V_S = 4.8 V
5V_S = 4.8 V
12V = 0
12V = 0
5V_M = 0
5V_M = 0...Leave a comment:
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Re: Element ELCHW402 - Screen Does Not Turn On
Hi Dskall. Thanks for the response.
STB:0
5V_S (#1): 4.81
5V_S (#2): 4.81
12V (#1): 0
12V (#2): 0
BR1: 0
5V_M (#1): 0
5V_M (#2): 0Leave a comment:
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Element ELCHW402 - Screen Does Not Turn On
Hello,
I would appreciate the help troubelshooting Element ELCHW402 screen not turning on. The red power indication LED is lit.
I have read the forums for the past few weeks and performed some troubleshooting. Great information but I couldn't solve the problem.
I've tested the power board with control board plugged in and received the following results:
STB: 2.12V
5V_S (#1): 4.79
5V_S (#2): 4.79
12V (#1): 0
12V (#2): 0
BR1: 0
5V_M (#1): 0
5V_M (#2): 0
I also noticed that... -
Re: New Members - please post your introductions here
Hi. I'm Jeremy.
I'm looking for info for my TV repair. Hope to start a thread soon.
Thanks,Leave a comment:
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