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CONTENTS
SAFETY PRECAUTIONS ......................................................................................................................................................... 2
SERVICE HINTS ...................................................................................................................................................................... 3
VOLTAGE CHECK AND OPTION BYTES
................................................................................................................................... 4
WAVEFORM PATTERN TABLE............................................................................................................................................... 5
ALIGNMENT SETTINGS .......................................................................................................................................................... 6
BLOCK DIAGRAMS.................................................................................................................................................................. 7
PARTS LOCATION................................................................................................................................................................... 9
REPLACEMENT PARTS LIST................................................................................................................................................ 10
SCHEMATIC DIAGRAMS....................................................................................................................................................... 15
CONDUCTOR VIEWS ............................................................................................................................................................ 17

SAFETY PRECAUTION
GENERAL GUIDE LINES
1. It is advisable to insert an isolation transformer in the 4. Check each exposed metallic part and check the
a.c. supply before servicing a hot chassis. voltage at each point.
2. When servicing, observe the original lead dress in the 5. Reverse the a.c. plug at the outlet and repeat each of
high voltage circuits. If a short circuit is found, replace the previous measurements.
all parts that have been overheated or damaged by 6. The potential at any point should not exceed
the short circuit. 1,4 Vrms. In case a measurement is outside the limits
3. After servicing, see that all the protective devices specified, there is a possibility of a shock hazard, and
such as insulation barriers, insulation papers, shields the receiver should be repaired and rechecked before
and isolation R-C combinations are correctly it is returned to the customer.
installed.
4. When the receiver is not being used for a long period
of time, unplug the power cord from the a.c. outlet. HOT CHECK CIRCUIT
5. Potentials as high as 29,5kV are present when this
receiver is in operation. Operation of the receiver a.c. VOLTMETER
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
familiar with the precautions necessary when working
on high voltage equipment. Always discharge the
anode of the tube.
6. After servicing make the following leakage current 2k 10 Watts WATER PIPE
checks to prevent the customer from being exposed (EARTH)
to shock hazard.
TO INSTRUMENT'S EXPOSED
LEAKAGE CURRENT COLD CHECK METALLIC PARTS
1. Unplug the a.c. cord and connect a jumper between Fig. 1.
the two prongs of the plug.
2. Turn on the receiver's power switch.
3. Measure the resistance value with an ohmmeter, X-RADIATION WARNING
between the jumpered a.c. plug and each exposed 1. The potential sources of X-Radiation in TV sets are
metallic cabinet part on the receiver, such as screw the high voltage section and the picture tube.
heads, aerials, connectors, control shafts etc. When 2. When using a picture tube test jig for service, ensure
the exposed metallic part has a return path to the that the jig is capable of handling 29,5kV without
chassis, the reading should be between 4M ohm and causing X-Radiation.
20M ohm. When the exposed metal does not have a
return path to the chassis, the reading must be NOTE: It is important to use an accurate periodically
infinite. calibrated high voltage meter.
LEAKAGE CURRENT HOT CHECK 1. Set the brightness to minimum.
1. Plug the a.c. cord directly into the a.c. outlet. Do not 2. Measure the high voltage. The meter should indicate:
use an isolation transformer for this check. 28,5kV