zen
Badcaps Veteran
Last Activity: 05-20-2024, 02:06 AM
Joined: 04-13-2011
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Thanks , ended up buying one from Ebay seller -
Drill control unit switch required ,help please
Hi all , it's part of a control unit that operates a drill.
Striped it down & cleaned contacts but not reliable
Hoping some one out there in the ethos can help me source one . ( see pictures )... -
BEOVISION MX4000 , NO POWER , ADVICE PLEASE
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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Hi , yes that's the chassii
Also just to add , crystal oscillator for chip is spot on at 24.5mhz...Leave a comment:
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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.
...Leave a comment:
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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 ? -
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 ?... -
Re: SU8022 , Technics left channel distorted. Schematic please
Thanks LotasLeave a comment:
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Re: SU8022 , Technics left channel distorted. Schematic please
Thank you very muchLeave a comment:
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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. -
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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Re: Kanto YU6 active speaker power board schematic please
Hi
Think i went with 2R2Leave a comment:
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Re: ART710A, RCF monitor speaker schematic/advice please
Hi & thanks very much for your input
Will update when i have the opportunity to work on it again.Leave a comment:
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Re: PS Audio SPR-A1 ,No audio from Right channel Can anyone help?
Hi,don't want to cause more damage as components around the suspected faulty chip blown.
Ordered a chip from Ali , but not sure if the 306P marking has any significance , or is some sort of batch code.Leave a comment:
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Re: PS Audio SPR-A1 ,No audio from Right channel Can anyone help?
R333 (3R9) O/C
Suspect it has been taken out by IC302 which i need help to identify.
It's marked Abletec.com C1 & below that is 306P...Leave a comment:
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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.... -
Re: Hi all No audio from Right channel Can anyone help?
Never seen one of these before but it's a Small amp manufactured by PS Audio.
I believe the model is SPR-A1
Known as the Sprout.
Apart from that i literally cannot find any other info on this thing.Leave a comment:
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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?... -
Re: GC9660 Philips iron advice please
Found the complete lead from ASWOLeave a comment:
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