c/p nixon_r
Testing and Repairing the Sonicview 360 Premier Power Supply
You should eliminate other possibilities first – perhaps a large USB Buss powered external hard drive, a possible short or other problem in your antenna system, corruption requiring the factory software to be loaded, or even the fact that some DP or DPP LNB’s and Switch combinations could require more current than the 700mA maximum LNB Current this Receiver can reliably provide.
You have the option to test or attempt to repair the power supply yourself(Edit poolguy) and buying a new one from them, IF they even support it anymore.
There are four separate outputs on this Power Supply, each one has important functions, and they must all be within specifications.
If you, or a 'Tech' friend could measure the voltages on your board for DC Voltage and AC Ripple content (Reference Chassis Ground), you would know if there is a problem and where it's at.
The voltage on the 3.3V output should be very close to 3.3V (The other 3 outputs will be somewhat 'close'). The AC Ripple should be between 1 to 3 milliVolts at 64 kHz.
I highly suggest replacing ALL the caps in the same circuit to prevent future ‘strange’ problems.
If you cannot follow this advice, I suggest you replace ALL the caps in the +3.3 Volt circuit, AND ALL the caps in the +7.5 Volt Circuit, and see if it solves the problem.
- - - - - by SmokinJim 20111006 - - - - -
SV360 Premier Power Supply: (REV 0 08-06-14) Note the value of EC206 in different Board Revisions.
Connector CN 2 To Main Receiver Board (Voltages are printed on the circuit board)
P1 (Black) +22 V P2 (White) +12 V P3 (White) +7.5 V
P4 (White) Gnd P5 (White) Gnd P6 (White) +3.3 V ----------
Caps EC201 330μF/35V, EC202 47uF/50V Caps EC203 47μF/50V, EC204 47uF/50V Caps EC205 470μF/16V, EC206 47uF/50V (Note: EC206 may be 330μF/16v)
Caps EC207 1,000μF/10V, EC208 1,000uF/10V
When Electrolytic Filter Capacitors start to go bad, you may see 'Strange' things going on with your Receiver. These random problems could include Inability to Boot, Re- Booting issues, USB Drive problems, Failure to load software with USB Drives, Inability to load with the ‘Serial Loader’ Program, Receiver Problems in general including Intermittent Satellite Reception, Unusual Heating, and many other problems that seem to get worse over time. Some of these symptoms may temporarily go away with a power switch reboot.
Electrolytic Capacitors should be tested out of circuit for Value, Leakage at rated Working Voltage, and ESR.
You cannot 'see' or ‘feel’ a good or bad cap. If they are bulged, rounded up at the top, have little pinholes, or have signs of dried up stuff on them, they are very-very- very bad - period. Continued operation in this condition can cause equipment failures.
If one cap is bad, replace the other ones in the same circuit too. Example1:3.3Volt–ReplaceEC207, AND EC208. Example2:7.5Volt–ReplaceEC205, AND EC206. Example 3: 22 Volt – Replace EC201, AND EC202.
Note: If you do not replace all the caps in the associated c1rcuit, you may have more ‘Strange’ problems later.
Observe polarity when replacing - Negative Lead goes to the bold black ( ) mark on the circuit Board.
These components were selected by design. Always use the same Value and Voltage ratings as the original. Try to get Low ESR and High Temp (105°c) replacements if you can. There is absolutely no point to go over voltage unless you cannot obtain the correct value, and the higher voltage Caps will be physically larger. Electrolytic Capacitors "like" to be operated around 60 to 80% of their working voltage.
Why do these caps go bad ?
There was a bad batch of Caps: There were many articles describing how this one company stole an incomplete formula for the electrolyte and produced a whole bunch of inexpensive caps, and flooded the world markets. Those caps found their way into a lot of consumer and commercial electronic devices, PC’s, medical equipment, and even into SV power supplies.
Next is heat. Loading your receiver with large USB Buss Powered Hard Drives and power hungry LNB’s and Switches makes the power supply work harder and produces more heat. Make sure the Bottom, Sides, and the Top of your receiver are clear and unobstructed to allow air flow, and the ventilation slots are open. Your Receiver draws power and produces heat - even when it’s in ‘Standby’ (Clock Display). Excessive heat can cause early component failure. Turn your unit Off once in a while when it’s not in use.
Filter caps in a switching power supply running at 64 kHz really get pounded in normal operation. They can and will feel warm to the touch in this application, but never HOT (indicates high leakage current or a partial short). They should never feel stone cold in this application – that could indicate a value decrease or an ESR increase.
The rectifier Diodes used in this power supply are all high speed Schottky diodes. They must be taken out of circuit to test. If they do go bad, they would usually ‘short’, and would usually shut the power supply down, or blow the protective fuse. Do not replace them with a regular rectifier diode because it will just 'smoke'.
Be warned - There is high voltage present on the rear half of that circuit board.