RCA MCR61TF30, Руководство по обслуживанию

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SERVICE MANUAL
SAFETY INSTRUCTIONS AND MAINTENANCE
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE X-RAY RADIATION PRECAUTION ,
SAFETY PRECAUTION AND PRODUCT SAFETY NOTICE INSTRUCTIONS-BELOW.
X-RAY RADIATION PRECAUTION
1. The EHT must be checked every time the receiver is serviced to ensure that the CRT does not emit
X-ray radiation as result of excessive EHT voltage. The nominal EHT for this receiver is 29KV (for
25”TV) or 30KV (for 29”TV) at zero beam current (minimum brightness) operating at AC 120V. The
maximum EHT voltage permissible in any operating circumstances must not exceed 32KV (for
25”TV) or 33KV (for 29”TV). When checking the EHT, use the High Voltage Check procedure in this
manual using an accurate EHT voltmeter.
2. The only source of X-RAY radiation in this receiver is the CRT. To prevent X-ray radiation, the
replacement CRT must be identical to the original fitted as specified in the Parts List.
3. Some components used in this receiver have safety related characteristics preventing the CRT
from emitting X-ray radiation. For continued safety, replacement component should be made after
referring the PRODUCT SAFETY NOTICE below.
SAFETY PRECAUTION
1. The receiver has a nominal working EHT voltage of 29KV (for 25”TV) or 30KV (for 29”TV). Extreme
caution should be exercised when working on the receiver with the back removed.
1) Do not attempt to service this receiver if you are not conversant with the precautions and procedures
for working on high voltage equipment.
2) When handling or working on the CRT, always discharge the anode to the receiver chassis before
removing the anode cap in case of electric shock.
3) The CRT, if broken, will violently expel glass fragments. Use shatterproof goggles and take extreme
care while handling.
4) Do not hold the CRT by the neck as this is a very dangerous practice.
2. It is essential that to maintain the safety of the customer all power cord forms be replaced exactly
as supplied from factory.
3. Voltage exists between the hot and cold ground when the TV is in operation. Install a separation
transformer during repairing or connecting to any testing equipment for the sake of safety. The
power of the separation transformer should exceed the rated overall power.
4. Replace blown fuses within the receiver with the fuse specified in the parts list.
5. When replacing wires or components to terminals or tags, wind the leads around the terminal
before soldering. When replacing safety components identified by the international hazard symbols
on the circuit diagram and parts list, it must be the company-approved type and must be mounted
as the original.
6. Keep wires away from high temperature components.
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