Colour Television Service Manual Model C25EG92F (France) Service Ref. No. C25EG92F-00 Service Ref. No. C25EG92F-02 PRODUCT CODE Specifications Power source AC 220~240V 50Hz 1113 24310 Television system System B/G, I, L/L' ORIGINAL VERSION Colour system PAL/SECAM Chassis No. EC3-A Receiving channel...
SAFETY PRECAUTION 1: An isolation transformer should be connected in the 3: When replacing a chassis in the cabinet, always be power line between the receiver and the AC line when certain that all the protective devices are installed a service is performed on the primary of the converter properly, such as, control knobs, adjustment covers or transformer of the set.
CIRCUIT DESCRIPTION 1.POWER SUPPLY control) The chroma signal is divided into R-Y and B-Y The power supply circuit of the EC3-A chassis is chroma signals, demodulated in IC101, and output from composed of a rectifier smoothing circuit, an oscillation pin30 (R-Y) and pin31 (B-Y). These chroma signals pass circuit, a control circuit and an output rectifier circuit.
6.HORIZONTAL OUTPUT Pin33: AFT signal input A horizontal oscillation signal is output from pin37 of Pin34: Option switch (GND) IC101 and switches the drive transistor Q431. This Pin35: Key scan signal input switching signal is current amplified by the drive Pin36: Timer-ON (Timer LED drive) transformer T431 and drives the output transistor Q432.
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B1 POWER SUPPLY ADJUSTMENT V-CENTRE ADJUSTMENT 1. Set VR351 to be mechanical centre before pressing the main 1. Tune the receiver to the circular pattern. switch. 2. If picture is not in the centre, connect or disconnect a lead 2. Tune the receiver to the PAL circular pattern. wire JR012.
CIRCUIT ALIGNMENT VIF ALIGNMENT 10kΩ 0.002µF 75Ω 1kΩ Output probe Input probe (A) DETECTOR DETECTOR ADJUSTMENT I ADJUSTMENT II DC 15V R352 & R382 R352 & R382 AGC voltage (4.3-4.5V) IC101-48 p IC101-48 p Output probe Tuner IF Tuner IF (Side b) (Side b) Input probe (A)
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MEMORY IC REPLACEMENT (Important Notice) PT M Level Button Function Button When you replace a memory IC (IC790), it is necessary to initialise the IC as follows. A. Initialisation of Memory IC 1. When you press and hold the Function button on the TV set and then press the Recall button on the RC transmitter, the following picture will appear on the screen.
Note Parts order must contain Service Ref. No., Part No., and descriptions. Ref. No. Part No. Description Part No. Description Ref. No. SERVICE REF. NO. C25EG92F-00 Read description in the Capacitor and Resistor as follows: CAPACITOR CERAMIC 100P K 50V OUT OF CIRCUIT BOARD Rated Voltage PICTURE TUBE...