Panasonic TC-15PM10R Service Manual

Contents

Panasonic TC-15PM10R Service Manual Manual pdf 2 page image

1 Safety Precautions 21.1. General Guide Lines 21.2. Leakage Current Cold Check 21.3. Leakage Current Hot Check (Fig. 1) 21.4. X-Radiation 31.5. MX-7 Chassis Block Diagram 32 Service Hints 42.1. Service Position for E-Board 42.2. Factory mode adjustment 42.3. Adjustment for White Balance 42.4. Adjustment for CRT CUT OFF 42.5. Adjustment Procedure 52.6. Pal Colour 52.7. Adjustment 63 L-BOARDTNP4G137AU(S’PORE)TNP4G137AD(M’EAST/CIS) 94 Z1-BOARDTNP4G139AA 105 A-BOARDTNP4G136AD(M’EAST)TNP4G136AU(S’PORE) 116 Schematic Diagram for models TC-15PM10R (MX-7 Chassis)137 CRT 148 Speakers 159 Schematic Diagram 1710 Replacement Parts List 19CONTENTSPage Page1 Safety Precautions1.1. General Guide Lines1. 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-Ccombinations, 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 28.5kV. is present when this receiver is in operation. Operation of the receiver without the rear coverinvolves the danger of a shock hazard from the receiver power supply. Servicing should not be attempted by anyone who is notthoroughly familiar with the precautions necessary when working on high voltage equipment. Always discharge the anode of thepicture tube to the receiver chassis before handling the tube. After servicing make the following leakage current checks toprevent the customer from being exposed to shock hazards.1.2. Leakage Current Cold Check1. Unplug the AC cord and connect a jumper between the two prongs on the plug.2. Turn on the receiver’s power switch.Measure the resistance value, with an ohmmeter, between the jumper AC plug and each exposed metallic cabinet part on thereceiver, such as screw heads, aerials, connectors, control shafts, ect. When the exposed metallic part has a return path to thechassis, the reading should be between 4 Mohm and 20 MΩ.When the exposed metal does not have a return path to thechassis, the reading must be infinite.1.3. Leakage Current Hot Check (Fig. 1)1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.2. Check a 2 kΩ non-inductive resistor and an AC/DC current meter, in series with each exposed metallic part on the receiver inturn and an earth such as a water pipe. The current from any point should not exceed 0.7 mA peak AC or 2 mA DC. In the caseof a measurement being outside of these limits specified, there is a possibility of a shock hazard, and the receiver should berepaired and rechecked before it is returned to the customer.2TC-15PM10R