CP-520
V
Service Manual
9
2
SAFETY INSTRUCTION
WARNING:
Only competent service personnel may carry out work involving the testing or repair
of this equipment.
X-RAY RADIATION PRECAUTION
1.
Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid
such hazards, the high voltage must not exceed the specified limit. The nominal value of the high
voltage of this receiver is
25KV
at max beam current.
The high
voltage must not, under any circumstances, exceed
29KV.
Each time a receiver requires servicing, the high voltage should be checked. It is
important to
use an accurate and reliable high voltage meter.
2.
The only source of X-RAY Radiation in this TV receiver is the picture tube. For continued
X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as
specified in the parts list.
SAFETY PRECAUTION
Potentials of high voltage are present when this receiver is operating. Operation of the receiver
outside the cabinet or with the back board removed involves a shock hazard from the receiver.
Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions
necessary when working on high voltage equipment.
Discharge the high potential of the picture tube before handling the tube. The picture tube is
highly evacuated and if broken, glass fragments will be violently expelled.
If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement
Parts List.
When replacing a high wattage resistor (metal oxide film resistor) in the circuit board, keep the
resistor 10 mm away from circuit board.
Keep wires away from high voltage or high temperature components.
This receiver must operate under AC 230 volts, 50 Hz. NEVER connect to a DC supply or any
other voltage or frequency.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this equipment have special safety-related
characteristics. These characteristics are often passed unnoticed by a visual inspection and the
X-RAY RADIATION protection afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage, wattage, etc. Replacement parts which have
these special safety characteristics are identified in this manual and its supplements, electrical
components having such features are identified by designated symbol on the parts list. Before
replacing any of these components, read the parts list in this manual carefully. The use of
substitutes replacement parts which do not have the same safety characteristics as specified in
the parts list may create X-RAY Radiation.
Summary of Contents for DTX-21B4
Page 17: ...CP 520V Service Manual 16 4 1 2 BLOCK DIAGRAM ...
Page 26: ...CP 520V Service Manual 25 Block diagram LA42032 ...
Page 33: ...CP 520V Service Manual 32 5 CIRCUIT DESCRIPTION 5 1 BLOCK DIAGRAM ...
Page 53: ...CP 520V Service Manual 7 Exploded View 52 7 1 DTX 21G2 ...
Page 54: ...CP 520V Service Manual Exploded View 53 7 2 DTX 21B4 ...
Page 55: ...CP 520V Service Manual Exploded View 54 7 3 DTX 21U7 ...
Page 56: ...CP 520V Service Manual 8 Printed Circuit Board 55 8 1 4859813693 OLD PCB ...
Page 57: ...CP 520V Service Manual Printed Circuit Board 56 8 2 4859816393 NEW PCB ...
Page 58: ...CP 520V Service Manual 9 Schematic Diagram 57 ...
