JVC HV-53PRO/K Service Manual page 10

HV-53PRO
SPECIFIC SERVICE INSTRUCTIONS
SCREEN HANDLING CAUTIONS
■ ■ ■ ■ SCREEN STORAGE
Store the SCREEN ASS'Y in a standing position in order to avoid deformation. If the screen is stored horizontally, there is risk of deforming the
screen face.
When necessary to place the SCREEN ASS'Y horizontally, position the screen side upwards and sure to place spacers between the screen and
resting site (floor or stand etc.) to prevent the screen from sagging.
■ SCREEN SURFACE
Since the screen surface is easily scratched or soiled, use ample care when handling.
DISASSEMBLY PROCEDURE
If the screen or screen panel need to
be replaced, remove the A screws
SCREEN
Leave the screen with flannel
lens and double lenticular lens attached.
If cannot be disassembled further.
PROJECTION UNIT REPLACEMENT
■ ADJUSTMENT DURING REPLACEMENT
When replcing the three R, G and B projection units, first replace the R and B units and perform focus / screen / raster centering adjustments
With reference to the G unit. Then replace the G unit and perform G focus / screen / convergence adjustment. Finally perform R & B
Convergence adjustments. Use care to simultaneously removes all three-projection units.
■ DISASSEMBLY CAUTION
The projection units include locations that are not to be disassembled during service. When replacing projection unit parts, disassemble to the
state indicated in the figure below.
The figure indicates screws and wires that are not to be removed. Use care not to remove these.
Deflection yoke wires : To connector on POWER & DEF. PWB ASS'Y.
[R="RHV", G="GHV", B="BHV"]
Convergence yoke wires : To connector on CONVERGENCE PWB ASS'Y.
[R="R", G="G", B="B"]
Check that tape is applied to the CRT neck.
If absent, the deflection yoke can dislodge.
Do not remove screws
LENS ASS'Y
LENS ASS'Y SCREW (X 4)
10
FRONT CABINET
SCREEN BRACKET
PC MAGNET
PC MAGNET
TAPE
DEF / CONVER. YOKE
CRT ASS'Y(COUPLER ASS'Y)
Do not disassembly
No. 51984
SCREEN BRACKET (TOP)
A(X4)
SCREEN BRACKET
A(X4)
A(X4)
A(X4) SCREEN BRACKET
(BOTTOM)
R CRT SOCKET PWB ASS'Y
G CRT SOCKET PWB ASS'Y
B CRT SOCKET PWB ASS'Y
VM PWB PWB (R/G/B)
● ANODE wires : to DIVIDER