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ORDER NO. MTV0501395C3 Colour Television TC-21FG10P GP31 Chassis Specifications Power Source : Power Consumption : Aerial Impedance : Receiving Channels : VHF CATV UHF Intermediate Frequency : Video Sound 38.0 MHz 31.5 MHz (D, K, K1) 32 MHz (I) 32.5 MHz (B, G) 33.5 MHz (M) Colour 33.57 MHz (PAL) 33.6 MHz (SECAM) 33.75 MHz (SECAM) 34.42 MHz (NTSC) Specifications are subject to change without notice. Mass and dimensions shown are approximate. Mass : Audio Output : Dimensions : 2-13 (USA STANDARD) 1-125 (USA STANDARD) 14-69 (USA STANDARD) Picture Tube : High Voltage : AC AUTO 110-240V, 50/60 Hz 83W 75 unbalanced Coaxial type Monitor Out Video / Terminals : RAV In AV1, 2 Video In 1 Vp-p 75 Audio In Approx. 400mVrms Video Out 1 Vp-p 75 Audio Out Approx. 400mVrms 27.5kV±1.5 at zero beam current A51LXR195X 51cm (21 inches) Measured diagonally, 90° deflection 16.0W Height : 473 mm Width : 648 mm Depth : 488 mm 24 kg (Net Wt.) © 2005 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. CONTENTS Page 1 Safety Precautions 1.1. General Guide Lines 1.2. Leakage Current Cold Check 1.3. Leakage Current Hot Check (Fig. 1) 1.4. X-Radiation 1.5. GP31 Chassis Block Diagram 2 Service Hints 2.1. Service Position for E-Board 2.2. Factory Mode Adjustment 2.3. Adjustment for White Balance 2.4. Adjustment for CRT CUT OFF 3 3 3 3 3 4 5 5 5 6 6 2.5. Adjustment Procedure 2.6. PAL Colour 2.7. Adjustment 3 Conductor Views 4 Schematic Diagram 4.1. A Board 4.2. L Board 5 Parts Locations 6 Replacement Parts List 6.1. Replacement Parts List Page 7 8 8 12 13 15 20 23 24 25 2 1 Safety Precautions 1.1. General Guide Lines 1. It is advisable to insert an isolation transformer in the AC supply before servicing this hot chassis. 2. When servicing, observe the original lead dress, especially the lead dress in the high voltage circuits. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 3. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers, shields and isolation R-C combinations, are properly installed. 4. When the receiver is not to be used for a long period of time, unplug the power cord from the AC cord outlet. 5. Potential, as high as 29.0kV is present when this receiver is in operation. Operation of the receiver without the rear cover involves the danger of a shock hazard from the receiver power supply. Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment. Always discharge the anode of the picture tube to the receiver chassis before handling the tube. After servicing make the following leakage current checks to prevent the customer from being exposed to shock hazards. 1.2. Leakage Current Cold Check 1. Unplug the AC cord and connect a jumper between the two prongs on the plug. 2. Turn on the receiver's p