Friday, July 8, 2016

Philips QFU2.1E Chassis LCD TV - SMPS circuits - troubleshooting

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Power Supply Unit For 32", 37", and 55" sets, power supply units should be repaired on component level.  All other power su...
Wednesday, July 6, 2016

Stereo Amplifier Circuit Diagram using Power Transistors

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Power transistors with LM391 or at the entrance, preamp
Sunday, July 3, 2016

Philips FR 680A Stereo Radiogram – Circuit Diagram

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Tubes used: EL84 – ECC83 – ECH81 - EAA91 – EF184 – EF93 – EM80 Circuit Diagram

Philips BR 405A - AC-DC Radio - Circuit Diagram

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Vacuum tubes used: ECH42 – EAF42 – EBC41 – EL42 – EM34 – AZ41 My age was 1-year; when this set was released by Philips in 1951.  Now I...
Thursday, June 30, 2016

A simple Ampli-Speaker circuit diagram – for beginners in electronics can try

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Used ICs: TDA2005 – LM324 – LM833 Circuit Daigram [Schematic]
Wednesday, June 29, 2016

NAD L56 DVD-Video Player – Circuit Diagram

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SMPS U-Com expander MPEG DVD DSP Drive-IF circuit
Friday, June 17, 2016

HP 7540 - 17 inch CRT monitor - Circuit Daigram

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Used ICs -  STR-G5643D – NT6865UG – STV9118 – LM1246 – LM 1248 – M1237BDKE - LM2470TA – STV9302A – 79A774-1 [LOT] – 2SC5929 [HOT Transistor...
Tuesday, June 14, 2016

MICROLAB A6331 – MICROLAB A6612 – HTS Circuit Diagram: 4558 – TDA7377 – TC4053 – TDA2030A

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Schematic: Microlab A6612 and Microlab A6331 Home Theater system .  Used ICs:  4558 – TDA7377 – TC4053 – TDA2030A A6331 - Circuit Diag...