Hi all
This B & O CRT TV is firing up , HT rises to 153V , with just a rustle of EHT , then shuts down.
If the on board button is held ,PSU pulses.
Removed line O/P transistor & used a 100W bulb as a dummy load , but still pulsing with button held .
Anyone know this set well enough to help distinguish whether i'm looking at a PSU issue or not ?
Depending on design PSU might be shutting down due to not receiving feedback .
Schematic may help
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BEOVISION MX4000 , NO POWER , ADVICE PLEASE
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Hi , yes that's the chassii
Also just to add , crystal oscillator for chip is spot on at 24.5mhz...
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Hi
Managed to prevent the switched supplies from decaying by applying an external 2V5 to pin 4 of the 5 regulators grouped together.
Starting to suspect the PHILIPS HERCULES CHIP that pretty much carries out all the processing & drives
Nothing resembling line drive from pin 62 , no data activity either.
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DDT21H95 DAEWOO CRT TV ADVICE PLEASE
Hi all
This set is not powering , with standby LED flashing GREEN/RED
PSU secondary supplies present& i assume ok
Line output transistor measures good
Took a chance & replaced LOPTX but still same
Can anyone help with advice or schematic ?
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Vsxlx305 , pioneer ( us model ) digital board required
Hi all
Customer shipped this amp over & then connected to UK mains.
As well as PSU , damage spread to digital board & killed the MCU .
Any ideas , or a contact for spares ?...
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SU8022 , Technics left channel distorted. Schematic please
Replaced the 2 STK0039 chips , plus swapped the left & right pre-amp drive boards , with no change in symptoms.
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Sunfire sub true sub woofer EQ signature schematic /advice please
Discovered that input to left or right channel will instigate a rumbling noise from sub , which is still present when signal removed.
Also discovered that if i monitor the plus 173V across one of the main smoothing caps, which is stable with no signal , but when input provided voltage can fluctuate 152V - 168V . Replaced the cap , which made no difference .
The minus 173V across the other cap is fine .
Could really do with some help trying to isolate this issue.
[url]https://youtu.be/MSwIRZFfPc0[/url]Discovered that input to left or right
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RK8D8100 Rotel amp, PSU schematic required
Hi all
trying to rebuild PSU module
Module PCB number seems to be SMPS 5400 V9
Other number on module 016E-1615B00
Bit of a sticking point where i need to identify a leaky diode, reference D43,marked D6....
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PS Audio SPR-A1 ,No audio from Right channel Can anyone help?
Hi all
No audio from Right channel
Can anyone help?...
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Re: GC9660 Philips iron advice please
Found the complete lead from ASWO
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Re: GC9660 Philips iron advice please
Really appreciate your input guys.
Had been searching for a complex issue where there wasn't one.
After some more investigation have discovered the issue.
The tubing that is a conduit for steam is being pinch when the iron is lifted high, which in turn restricts the flow.
Thinking of fitting some something over the tubing to stop it from being pinched.
Any other ideas welcome.
[ATTACH]280271[/ATTACH]...
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