I am planning to repair the CD servo board on a Kenwood RXD-G2 hifi system. The problem is that the sound is distorted on the outermost tracks on the CD (it is not over 74 minutes). There are a couple of Jamicon capacitors; nearly all of them are below 1uF. Should I replace all of the electrolytics 4.7uF and below with tantalum or polyester units?
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My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics. -
Re: CD Servo Board with unusual problem
I have a similar issue (drop-outs near the outer edge of a CD) with a Technics SL-PD867 5-CD changer, but only with some CDs - I think it's probably dust on the lens or CD. -
Re: CD Servo Board with unusual problem
Ensure that the CD transport can freely move all the way to the outside, and that it's not binding anywhere. You may need to grease the screw drive.Ludicrous gibs!
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Re: CD Servo Board with unusual problem
CD transport is OK (it is not a screw drive). Replaced all of the capacitors 4.7uF and below with polyester units, with the 4.7uF unit being a tantalum unit (All of the capacitors replaced were in the analog signal processing section). CD player section now works perfectly
. I guess the place where we last got it serviced thought it was a problem with one of the ICs 
- don't overlook small-value electrolytic capacitors, especially those below 1uF.
My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.Comment
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Re: CD Servo Board with unusual problem
Thanx for tips like this. I would have also gone for the chip.Originally posted by japlytic - don't overlook small-value electrolytic capacitors, especially those below 1uF.JimComment
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Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
Hi there!
I have a Sony Bravia KDL-40Z4500 which shows a colored vertical stripes pattern when turning on, with a central black shadow that slowly dissipates within the first 10 seconds.
Photo of the situation after the black shadow dissipates:
After this behavior the red LED will blink 9 times, then pause for a bit, and blink again 9 times, in a loop.
I checked the manual (available here) and this corresponds to "HFR error", quoting from the manual:
> This indicates HFR Communication error. [ HFR Communication... -
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"...
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