Completely dead. No functions or display. +12 volt supply is down to 10.8v: 5volts supply is ok (5.3 volts).:3.3 volts is ok: -12volts is is 11.3v: -24v is 22.8v have checked all diodes and related electrolytic capacitors.
Comments
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Is the red LED (standby) lit?
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No the (standby) red led is not lit. No display at all
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Check CN301 pin1 power voltage
Check all buttons opened
PHILIPS DVP3005 Service Manual download, schematics, eeprom, repair info for electronics experts
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(1)download philip 3005 service manual.
(2)see p.5 signal flow. panel ON only when MT1389C is OK and +12V -24V power K CLK & DATA are OK as well. p.11 E/F 3/4 area.
(3)check MT1389C pin105 reset signal with an analog 40~50MHz oscilloscope with slowest time base and 1v/div.
(4)check crystal 27 MHz at A1 area with probe x10 at C39 and C40 to see sine waveform at 27Mhz here.
(5)if 1-4 OK,see if data & clk signal for panel are present at pin92~95.
(6)1~5 ok but cannot turn on still. Check flash rom p.12 reset, vcc, data (D0-D15)and adress (A0-A20) signals.
(7)Right voltages will not make this stuff turn on if MT1389C & flash rom are dead. Failure chance of flash rom is very low indeed. The chance of failure of MT1389C is half half.
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