JVC 330 Problem and, Possible Solution, Service, Operator, Symptom to, Manual, Reset TOP BLANKING

Chapter 5---Troubleshooting

Problem and	Possible Solution		Service	Operator
Symptom to			Manual	Manual
Check
Image out of focus
Spacer balls not	Set projection lens focus so ILA®			4.5
visible.	spacer balls are visible.
ILA® Spacer balls	Adjust CRT Mechanical Focus.		3.7	4.7.2
visible but
image fuzzy.
CRT focus range is	Adjust electronic focus.		3.8	4.7.3
limited and
image is fuzzy.
CRT focus not	Set Relay Lens against back stop.
effective.
CRT focus not	Ensure ILA® assembly is installed		4.12
effective.	correctly and clamps are snug.
CRT focus limited	Readjust fixed rod at upper left of		3.7
due to focus rod	CRT mounting bracket.
range.
Image blurry with	Replace ILA®	Assembly.	4.12
shadow on right
edge.
Characters do not	Replace ILA®	Assembly.	4.12
appear legible.
CRT focus problem	Replace CRT.		4.7
limited to single
color.
G2 mis-adjusted.	Reset G2.		3.10
Sensitivity offset set	Reset sensitivity offset.
too high.
Picture geometry
Picture not	Adjust using PHASE and POSITION.			4.8
centered.
Picture size	Adjust using SIZE and BLANKING.
incorrect.
Picture wrap around	Reset left or right BLANKING.
left or right
edge.
Retrace lines on	Reset TOP BLANKING.
raster.

Model 330, 340SC, and 370SC Service Manual 5-10