JVC AV-32DF74YA
Service Manual

3.1.9 REMOVING THE CRT (PICTURE TUBE) NOTE: � Replacement of the CRT should be performed by 2 or more persons. � After removing the REAR COVER, CHASSIS etc., (1) Putting the CRT change table on soft cloth, the CRT change table should also be covered with such soft cloth (shown in Fig. 3). (2) While keeping the surface of CRT down, mount the TV set on the CRT change table balanced will as shown in Fig. 3. (3) Remove 4 screws marked by arrows with a box type screwdriver as shown in Fig. 4. NOTE: Since the cabinet will drop when screws have been removed, be sure to support the cabinet with hands. (4) After 4 screws have been removed, put the cabinet slowly on cloth (At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig. 5. NOTE: � The CRT should be assembled according to the opposite sequence of its dismounting steps. � The CRT change table should preferably be smaller that the CRT surface, and its height be about 35cm. COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION. Subsequent to replacement of the CRT and HV transformer or repair of the anode cap, etc. by dismounting them, be sure to coat silicon grease for electrical insulation as shown in Fig.6.Wipe around the anode button with clean and dry cloth. (Fig.6)Coat silicon grease on the section around the anode button. At this time, take care so that any silicon greases dose not sticks to the anode button. (Fig.7)
CRT CHANGE TABLE

APPROX. 35cm CLOTH

Fig.3
CRT

CRT CHANGE TABLE BOX TYPE SCREW DRIVER

Fig.4
CRT

CABINET

CAUTION FOR DEGAUSSING WORKS
Whenever degaussing works are required due to distorted images and colors caused by the replacement of the CRT or other external magnetic forces, self-degaussing (internal degaussing) should be carried out without fail instead of degaussing the monitor from the outside. Because of the characteristics of the CRT used in this monitor , the distorted images and colors may worsen if degaussing the monitor from the outside has been performed. Even if external degaussing works have been carried out, self-degaussing should be performed by turning the power on the monitor. When you want to perform self-degaussing of the monitor whose power is already turned on, turn of f the power and wait for about 10 minutes before turning the power on the monitor again for self-degaussing.
Fig.5

CRT CHANGE TABLE

Silicon grease product No. KS - 650N
CRT Anode button

Silicon grease coating

Fig.6
Approx. 20mm (Do not coat grease on this section Silicon grease should be coated by 5mm or more from the outside diameter of anode cap.

Anode button (No sticking of silicon grease)

Coating position of silicon grease Anode cap

Fig.7

1-12 (No.52156)