Tuesday, December 29, 2015

PHILIPS BDP5500 SOFTWARE UPDATE AND POWER SUPPLY CIRCUIT

PHILIPS BDP5500

Software check and upgrade
Preparation to upgrade software
1)Start the CD burning software & create a folder named "UPG_ALL",
2)Then copy the Bin file (BDP5500.bin ) into it,
3)Burn the data onto the blank CD or USB.
A. Procedure for software upgrade
A) Upgrade software via Disc
1) Power on the set and insert the prepared Upgrade CD.
2) The set will starts reading disc & response with the following display TV screen:
Now searching for upgrade software!
Please wait!
3) Wait for a few seconds, then screen will display: Software upgrade for this player have been found. Do you want to upgrade?
4) Press Right cursor button to choose "Start", then press <OK>;
5) The software will upgrade and screen will display as below: Upgrade is ongoing, Please wait. Please do not unplug or switch off the device.
6) The screen will display as below when upgrading complete: Upgrade has completed successfully!
Power off after 5s.
Software BE:Passed
Software FE:Passed
5) Restart the set.
B) Upgrade softwar via network:
1) Setup the network connection (See "Getting started">"Set up network").
2) In the Home menu, select <Setting>-<Advanced Setup>- <Software Download>-<Network>.
* You are prompted to start upgrading processes if upgrade media is detected.
3) Follow the instructions on the TV screen to confirm update operation.
* Once software updated is complete, this player automatically truns to reboot.
C) Update software via USB Flash Drive:
1) Go to www.philips.com/support to check if the latest software version is available for this player.
2) Download the software onto a USB flash drive.
3) Insert the USB flash drive to the USB jack of the rear panel.
4) In the Home menu, select <Setup>-<Advanced Setup>-<Software Updade
>-<USB>.
5) Follow the instructions on the TV screen to confrim update operation.
* Once software update is complete, this player automatically turns to reboot.
(choosing "Cancle" or"Start" shows on TV set)
(choosing "Restart" shows on TV set)
B. Read out the software versions to confirm upgrading
1) Power on the set.
2) Press <Home> button on the reomote control.
3) Select <Setup>, then press <OK>.
4) Select <Advanced Setup>, press right cursor to choose
<Version Info.>, then press <OK>, the software version and other information will display on the TV screen as below:
Model:BDP5500
Versions:
System SW: XXX
Ethernet MAC:XX-XX-XX-XX-XX-XX
Wireless MAC:XX-XX-XX-XX-XX-XX
For Information,frequently asked questions and software updates,visit philips.com/support
Caution: The set must not be power off during upgrading, otherwise the Main board will be damaged entirely.
TNY 179 SMPS DRIVER IC 
Description
TinySwitch-LTincorporates a 650 V power MOSFET, oscillator, high voltage switched current source, current limit (user selectable) and thermal shutdown circuitry. The IC family uses an ON/OFF control scheme and offers a designflexible solution with a low system cost and extended power capability.
Applications
• Chargers/adapters for cell/cordless phones, PDAs, digital cameras, MP3/portable audio, shavers, etc.
• DVD/PVR and other low power set top decoders
• Supplies for appliances, industrial systems, metering, etc.
Pin Functional Description
DRAIN (D) Pin:
This pin is the power MOSFET drain connection. It provides internal operating current for both startup and steady-state operation.
BYPASS/MULTI-FUNCTION (BP/M) Pin:
This pin has multiple functions:
1. It is the connection point for an external bypass capacitor for the internally generated 5.85 V supply.
2. It is a mode selector for the current limit value, depending on the value of the capacitance added. Use of a 0.1Uf capacitor results in the standard current limit value. Use of a 1uF capacitor results in the current limit being reduced to that of the next smaller device size. Use of a 10uF capacitor results in the current limit being increased to that of the next larger device size for TNY175-180.
3. It provides a shutdown function. When the current into the bypass pin exceeds ISD, the device latches off until the BP/M voltage drops below 4.9 V, during a power down. This can be used to provide an output overvoltage function with a Zener connected from the BP/M pin to a bias winding supply.
ENABLE (EN) Pin:
The switching of the power MOSFET is controlled by this pin. MOSFET switching is terminated when a current greater than a threshold current is drawn from this pin. Switching resumes when the current being pulled from the pin drops to less than
a threshold current. A modulation of the threshold current reduces group pulsing. The threshold current is between 75 uA and 115 uA. SOURCE (S) Pin: This pin is internally connected to the output MOSFET source for high voltage power return and control circuit common.
Oscillator
The typical oscillator frequency is internally set to an average of 132 kHz. Two signals are generated from the oscillator: the maximum duty cycle signal (DCMAX) and the clock signal that indicates the beginning of each cycle.
Over Temperature Protection
The thermal shutdown circuitry senses the die temperature. The threshold is typically set at 142 °C with 75 °C hysteresis. When the die temperature rises above this threshold the power MOSFET is disabled and remains disabled until the die temperature falls by 75 °C, at which point it is re-enabled. A large hysteresis of 75 °C (typical) is provided to prevent overheating of the PC board due to a continuous fault condition.
Current Limit
The current limit circuit senses the current in the power MOSFET. When this current exceeds the internal threshold (I LIMIT), the power MOSFET is turned off for the remainder of that cycle. The current limit state machine reduces the current limit threshold by discrete amounts under medium and light loads. The leading edge blanking circuit inhibits the current limit comparator for a short time (tLEB) after the power MOSFET is turned on. This leading edge blanking time has been set so that
current spikes caused by capacitance and secondary-side rectifier reverse recovery time will not cause premature termination of the switching pulse.
POWER SUPPLY SCHEMATIC DIAGRAM 
CLICK ON THE IMAGE TO ZOOM IN