Monday, October 19, 2015

SAMSUNG BD-P1000XEU FIRMWARE UPDATE AND POWER SUPPLY CIRCUIT

SAMSUNG BD-P1000XEU 

FIRMWARE UPDATE AND POWER SUPPLY CIRCUIT 

Firmware Update
Main F/W Update Method (for Blu-ray Disc Logical Problem)
1) Insert update CD and close the tray.
2) Press Yes if the update CD you insert is a later one than before.
3) Wait about 10 minutes.
4) When Finished, tray opened automatically, then power goes off.
Sub F/W Update Method (for DVD Logical Problem)
1) Insert update CD and close the tray.
4) When Finished, tray opened automatically, then power goes off.
2) Press Yes if the update CD you insert is a later one than before.
3) Wait about 2~3 minutes
4) When Finished, tray opened automatically, then power goes off.
Loader F/W Update Method (for Disc Physical Problem)
1) Insert update CD and close the tray.
2) Press Yes if the update CD you insert is later one than before.
3) Wait about 1~2 minutes.
4) When Finished, tray opened automatically, then power goes off.
POWER SUPPLY CIRCUIT
CLICK ON THE IMAGE TO ZOOM IN

Circuit Operating Descriptions
About S.M.P.S (ringing choke converter methol)
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1) 1st : Common power input to 1st winding.
2) 2nd : Circuit followings output winding of transformer.
3) f (Frequency) : Switching frequency (T : Switching cycle)
4) Duty : (Ton/T) x 100
Circuit description [FLY-Back RCC(Ringing Choke Converter)] Control
(a) AC Power Rectification/Smoothing Terminal
1) BD01 : Convert AC power to DC (Wave rectification).
2) C10 : Smooth the voltage converted to DC.
3) C01,C02,C04,C05,C06,BD02 : Noise removal at power input/output.
4) R10 : Rush current limit resistance at the momemt of power cord insertion.
Without R10, the bridge diode might be damaged as the rush current increases.
(b) SNUBBER Circuit : PTD01 - C13,C12,D10,R11,R12 PTD02 - C18,C19,D15,R20,R21
(c) Vcc circuit
1) R11, R12 : IC01 driving resistance (IC01 works through driving resistance at power cord in)
2) IC01 VCC: R13, D11, C11, ZD10, IC02 VCC: D12, R16, C20, ZD11
1. Use the output of transformer as Vcc,because the current starts to flow into transformer while IC01, IC02 is active.
2. Rectify to D11, D12 and smooth to C11, C20.
3. Use the output of transformer as IC01, IC02 Vcc : The loads are different before and after IC01, IC02 driving. (Vcc of IC01, IC02 decreases below OFF voltage , using only the resistance dut to lode increase after IC01, IC02 driving.)
1) Prevent residual high voltage at the terminals of switch during switch off/Suppress noise. High inverted power occurs at switch off, because of the 1st winding of transformer : (V=-L1 xdi/dt. L1 : Leakage Induction) A very high residual voltage exist on both terminals of IC01,IC02 - PIN 1 because dt is a very short.
2) SNUBBER circuit protects IC01,IC02 from damage through leakage voltage suppression by RC, (Charges the leakage voltage to D10,C12,C13 and discharges to R11,R12). PT02 : Chrages the leakage voltage to D15,c18,c19 and dischages to R20,R21
(d) Feedback Control Circuit
CLICK ON THE IMAGE TO ZOOM IN

1) F/B terminal of IC01, IC02 determines output duty cyle.
2) C-E (Collector-Emitter) of IC01, IC02 and F/B potential of IC01, IC02 are same.