Hughes Jvc 220 Projector Service Manual

							Chapter 5---Troubleshooting 
 
Figure 5-2.   Left side of projector with rear cover off. 
 
Figure 5-3.   Right Side of projector with rear cover off. 
 
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							Chapter 5---Troubleshooting 
   
Figure 5-4.   Convergence/Deflection and Video Amplifier LEDs. 
5.2   Error Codes 
For certain errors that may occur in the Model 220 Projector the softwar\
e 
provides error codes that are helpful in determining the nature of the 
problem. These error codes can be seen on the left side of the monitor 
screen when using a PC connected to Port A or Port B.  
Table 5-1.   Error Categories: 
CATEGORY 
NUMBER ERROR CATEGORY DESCRIPTION 
1 CEXEC Operating System. 
2 FLASH HW Flash Memory HW driver. 
3 IIC HANDLER IIC Handler for Convergence/Deflection PCB, 
Horizontal/Vertical Deflection PCB, Raster 
Timing Generator PCB, Video Amplifier PCB, 
Video Processor PCB. 
4 POWER ON/OFF Power On Sequencing. 
5 FLASH MANAGER Flash Memory Data Manager. 
6 VIDEO SWITCHER EXTRON or JVC Video Switcher Handler. 
7 ANSI OUTPUT Ansi Output Display process. 
8 UI CHAN/SRC User Interface VIC Configuration Handler for 
Channel/SRC Data. 
9 VIDEO INPUT CARD VIC Card Handler. 
10 HARDWARE Misc HW (shutters, etc.). 
The error codes listed in Table 5-2 describe problems associated with 
software (Version 0.9.8) and hardware while the projector is operating\
. 
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							Chapter 5---Troubleshooting 
The first column of the table lists the error number code that appears o\
n 
the PC screen. The second column describes the on-screen text. The 
third column provides a description of the problem and any other pertine\
nt 
information. 
Table 5-2.   Error Codes. 
ERROR 
NUMBER ON-SCREEN TEXT DESCRIPTION 
1.5 “Invalid read/wrt” Software error-mismatch. Open mode vs. Write or 
Read command. 
1.12 “Ser parity error” Serial Port Parity error-not currently used. 
1.13 “Bad dev I/O oper” Software error-invalid I/O request. 
1.27 “Timeout on Read” Software error-unexpected timeout on Read. 
1.34 “No mem available” Software error-no heap available for memory 
allocation. 
2.1 “Invalid Sector” Software error-invalid Flash sector number. 
2.2 “Write Timeout” Flash Memory Write Failure. 
2.3 “Erase Timeout” Flash Memory Erase Sector Failure. 
2.4 “Verify Error” Flash Memory Write Verify Failure. 
NOTE: Category 3 error codes may occur when power is interrupted by open\
ing the cover interlock 
switches or during power brown-outs. 
3.1 “Pin Timeout” IIC Slave HW protocol error-possible on each byte 
transfer. 
3.2 “BB Timeout” IIC Slave HW protocol error-1st error possible on 
Read or Write. 
3.3 “No Slave Ack” IIC Slave HW protocol error-missing 
acknowledgement on byte transfer. NOTE: This error 
occurs if the slave is missing. During Power On, this 
error is reported in the POWER category. 
4.1 “CD PCA Missing” “No Slave Ack” on first poll of Convergence/Deflection 
PCB. 
4.2 “CD PCA Not OK” /CD_OK is high (BAD). 
4.3 “”HVD PCA Missing” “No Slave Ack” status on first poll of 
Horizontal/Vertical Deflection PCB. 
4.4 “HVD PCA Not OK” HVD_OK is High (BAD)-[/HVD_OK requires RTG 
Timing. 
4.5 “VA PCA Missing” “No Slave Ack” status on first poll of VA. 
Table 5-2   Error Codes (continued) 
4.6 “VA PCA Not OK” /VA_OK is High (BAD). 
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							Chapter 5---Troubleshooting 
4.7 “VP PCA Missing” “No Slave Ack” status on first poll of VP. 
4.8 “VP PCA Not OK” VP_OK is High (BAD) 
4.9 “RTG PCA Missing” “No Slave Ack” status on first poll of RTG 
4.10 “RTG PCA Not OK” RTG_OK is High (BAD) 
4.14 “Lamp Startup” Lamp Failed to light (/LAMP_LIT_B not Low for 3 
seconds out of 20 seconds.) 
4.15 “Low Voltage PS” Low Voltage PS failed (/LV_OK_B is High). 
4.16 “High Voltage PS” High Voltage PS failed (/HV_OK_B is High). 
4.17 “VIC1 Board Not OK” /VIC_OK is High (BAD) on VIC Slot 1. 
4.18 “VIC 2 Board Not Ok” /VIC_OK is High (BAD) on VIC Slot 2 
4.19 “VIC3 Board Not OK” /VIC_OK is High (BAD) on VIC Slot 3 
4.20 “VIC1 Invalid Type” Software does not support VIC_ID in Slot 1 
4.21 “VIC2 Invalid Type” Software does not support VIC_ID in Slot 2 
4.22 “VIC3 Invalid Type” Software does not support VIC_ID in Slot 3 
4.23 “Shutters Missing” One or more shutters not installed (BAD) 
4.24 Lamp Start Not On /LAMP_OK is high, lamp module not installed, jumper 
missing, ALPS bad. 
No error codes in Category 5 (Flash Manager) 
Most Category 6 error codes indicate RS232 communication errors and appl\
y to Switchers only. 
6.1 “Sync Timeout” No Header found in data stream - possible baud rate 
error. 
6.2 “No Char Repeat” Expected data characters to be repeated - failed. 
6.3 “Invalid Format” Data not in Extron or JVC Switcher format. 
7.1 “Write Len Error” Ansi Output to RS232 port was interrupted - 
incomplete. 
8.1 “VIC Slot is empty” User has selected a Channel - VIC is not present. 
8.2 “VIC Type Changed” User has selected a Channel - VIC type has changed. 
User may have swapped a VIC into an incorrect slot. 
8.3 “Interpol Blocked” Software process error - Interpolation Process not 
allowed to run by higher priority processes.  
9.1 “Quad Dec Not Init” HW: Quad Decoder failed Startup Sequence. 
10.1 “Shutter Stat BAD” One or more shutters reading wrong status. 
One other error may appear on the monitor screen with the statement “Assertion 
Failed” (only if the PC is connected to Port A). This is a very rare but seri\
ous 
error. If it occurs, copy the 3 lines that appear on the screen, note what occured 
just prior to this failure, and call Hughes-JVC. 
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							Chapter 5---Troubleshooting 
5.3.   Troubleshooting Guide 
Table 5-2 shows some common projector problems, what to check when problems occur, possible 
solutions and the section in this Service Manual (If User’s Guide co\
ntains pertinent information, the 
appropriate section will be given) that provides some related information on the problem. 
Table 5-3. Troubleshooting Guide. 
PROBLEM CHECK POSSIBLE SOLUTION SECTION 
No Power Main Circuit Breaker on 
Projector rear panel. 
Reset Circuit Breaker.  
 Main Circuit Breaker fails 
when reset. 
Verify input power is 
correct. Replace 
defective Low Voltage 
Power Supply or Arc 
Lamp Power Supply. 
4.5 and 4.6 
 Power Interlock Switch Test switch operation. If 
defective, replace switch. 
 
 Projector cover not 
enabling interlock 
switch? 
Reposition projector 
cover. 
4.2 
No Picture Correct channel input & 
VIC selected? 
Select correct channel 
and VIC. 
User’s Guide 4.6 
 Arc Lamp turned off. Restart projector. User’s Guide 4.3. 
 System power turned off. Restart projector. User’s Guide 4.3. 
 Signal source Verify signal source is 
turned on and properly 
connected. 
User’s Guide 3.5. 
 HIDE command 
invoked? 
Unhide image with the 
HIDE key on the remote. 
 
 One color is missing. Turn on the missing color 
with the HIDE key. 
 
 No image or raster on 
one CRT. 
Replace defective CRT or 
Video Amplifier Board. 
4.15, 4.13 
Arc Lamp Arc Lamp will not light. 
Clicking noise is heard 
when projector is turned 
on. 
Replace worn out Arc 
Lamp.  
4.4 
 Clicking noise not 
audible when projector is 
turned on. 
LVPS, ALPS, or Ignitor 
faulty. Replace LVPS, 
ALPS, or Ignitor. 
4.6, 4.5, 4.4 
 Arc Lamp ignites but will 
not stay lit. 
Replace defective Ignitor. 4.4 
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							Chapter 5---Troubleshooting 
Table 5-3.   Troubleshooting Guide (continued) 
PROBLEM CHECK POSSIBLE SOLUTION SECTION 
Arc Lamp Brightness flicker or 
picture is very dim. 
Arc Lamp may have too 
many hours of usage. 
Replace Arc Lamp. 
4.4 
Image out of focus Spacer balls not visible. Perform the Projection 
Lens Focus procedure.  
User’s Guide 5.5.15 
 ILA® “spacer balls” are 
visible but the image is 
fuzzy. 
Perform the CRT 
Mechanical Focus 
procedure. 
3.5 
 CRT focus range is 
limited and the image is 
fuzzy. 
Adjust the Electronic 
focus. 
5.6 
 CRT focus in not 
effective. 
Ensure the ILA® 
assembly is installed 
correctly. 
4.16 
 Image blurry with 
shadow on right edge. 
Replace ILA® assembly. 4.16 
 Characters do not 
appear legible. 
Replace ILA® assembly. 4.16 
 CRT focus problem is 
limited to one color. 
Replace CRT. 4.15 
 Sensitivity Offset is set 
too high. 
Reset Sensitivity Offset. User’s Guide 5.9.2 
Picture Geometry Picture not centered or 
sized correctly. 
Repeat the Blanking, 
Phase, Size, and 
Centering procedures. 
User’s Guide 5.4.3, 
5.4.4, 5.5.1, 5.5.2. 
 Picture “wraparound” at 
left or right edge. 
Readjust Blanking and 
Phase. 
User’s Guide 5.4.3, 
5.4.4. 
 Retrace lines on raster. Adjust TOP Blanking. User’s Guide 5.4.3. 
 Image not squared. Check Geometry and 
readjust if necessary. 
User’s Guide 5.5.3, 
through 5.5.10. 
 Image bowed at left/right 
edge or top/bottom. 
Check Bow, Pincushion 
Balance, and Pincushion 
adjustments. 
User’s Guide 5.5.3, 
5.5.4, 5.5.10. 
 Picture Linearity. Readjust Horizontal, 
Vertical, or Edge 
Linearity.  
User’s Guide 5.5.7, 
5.5.8. 
XY Convergence Linearity is different 
between colors. Unable 
to converge. 
Yoke not properly set on 
CRT. Perform CRT 
Rotation procedure. 
3.6 
 Horizontal size is 
different between colors. 
Adjust horizontal coils on 
Scan Reversal Board. 
3.10 
 Vertical size is different 
between colors. 
Adjust vertical size pots 
on Horizontal/Vertical 
Deflection board. 
3.10 
Table 5-3.   Troubleshooting Guide (continued) 
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							Chapter 5---Troubleshooting 
PROBLEM CHECK POSSIBLE SOLUTION SECTION 
XY Convergence Not enough range in Red 
or Blue XY convergence. 
Adjust Red or Blue 
CENTERING to match 
Green. 
5.5.11 
Picture Color 
Balance 
Red, Green, or Blue is 
missing in the image. 
ILA® assembly bias 
voltage is incorrect or 
there is no signal-replace 
Video Amplifier Board. 
4.13 
 Red, Green, or Blue 
lacks color. 
Replace ILA® assembly 
or Video Amplifier Board. 
4.16, 4.13 
 Grey scale test pattern is 
correct but image color is 
incorrect. 
Readjust Contrast. User’s Guide 5.11.2 
 Black image is 
overdriven. 
Adjust Threshold, Black 
level, and Brightness. 
User’s Guide 5.10.2, 
5.9.1, 5.11.1. 
 Bright Red, Green, or 
Blue area on screen 
limited to corners or 
edge. 
Adjust ILA® bias and 
shading. 
User’s Guide 5.7, 5.10 
 Grey scale is Green in 
bright areas. 
Subtract Green 
Sensitivity Offset and add 
Red and Blue. 
User’s Guide 5.9.2 
 Grey scale is Red in 
bright areas. 
Subtract Red Sensitivity 
Offset and add Green 
and Blue. 
User’s Guide 5.9.2 
 Grey scale is Blue in 
bright areas. 
Subtract Blue Sensitivity 
Offset and add Green 
and Red. 
User’s Guide 5.9.2 
Picture-Various 
Problems 
Out of focus, blurry area 
on image limited to Red, 
Green, or Blue. 
Clean oily spot off CRT, 
Prism, or Projection 
Lens. 
3.12 
 Small, dark line or dot in 
Red, Green, or Blue 
image. 
Scratch in optics or CRT 
burn. Replace CRT. 
4.15. 
 Bubbles in Red, Green, 
or Blue image. 
Replace affected ILA® 
assembly. 
4.16. 
 Image ghost in picture. Replace burn-in CRT or 
ILA® assembly 
4.15, 4.16 
 Reversed ghost image on 
screen. 
If projecting through 
glass, prevent light from 
reflecting back into the 
lens. 
 
 Picture lacks depth of 
field. 
Adjust Contrast or 
Brightness. 
User’s Guide 5.11.2, 
5.11.1 
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							Chapter 5---Troubleshooting 
 
Table 5-3.   Troubleshooting Guide (continued) 
PROBLEM CHECK POSSIBLE SOLUTION SECTION 
Picture-Various 
Problems 
Image jitter and noise. Replace Video Processor 
Board. 
4.8 
 Image jitter present at 
one source only. 
Replace Raster Timing 
Generator. 
4.8 
 Image is not level. Level the projector or 
rotate the CRT Yoke. 
3.6 
 “Flagwaving” at top of 
picture or top of image is 
skewed. 
VTR mode checked in 
Timing menu. Deselect 
VTR mode.  
User’s Guide 4.9 
{4.Timing (5) }. 
 Black line appears on the 
screen. 
Loss of fluid in Prism. 
Replace Prism. 
4.18 
No Response when 
using a Tether cable 
on the Remote. 
Possible defective tether 
cable. 
Replace tether cable.  
No Response when 
using IR remote. 
Intermittent operation. Replace remote battery 
or move closer to the 
projector. Stay in the 
“Line of sight” of the 
projector IR Receiver. 
 
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							Chapter 5---Troubleshooting 
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							   Chapter 6---Parts List 
6.0  Parts List 
 
 DESCRIPTION PART NO. 
Bottom Cover Assembly 102614 
Arc Lamp/Heat Sink Assembly 104452 
Cathode Ray Tube (CRT) 103465 
CRT/Yoke Assembly 103350 
Diffuser, Holographic 104207 
Electronics Cover Assembly 102613 
Ignitor Assembly, 750W (Ignitor & Laser P.S.) 103671 
ILA®, SM Moving 3 x 4 Video (High Contrast) 
Add for Blue -44, for Green -45, for Red -46. 
102630 
 
ILA®, SM Moving 3 x 4 Video (Reduced Aperture)
Add for Blue -44, for Green -45, for Red -46. 
100594 
 
Lens, First Condensing (Asphere) 104162 
Lens, Second Condensing 104156 
Manual, Operation (User’s Guide)  104199 
Manual, Service 104346 
Motor, Focus 103666 
Optics Cover Assembly 102612 
PCA Convergence Deflection 102581 
PCA Horizontal/Vertical Deflection 102583 
PCA Raster Timing Generator 102589 
PCA System Controller 102591 
PCA Video Amplifier 102593 
PCA Video Processor 102597 
PCA, Backplane 102595 
PCA, HDTV VIC (Option) 103765 
PCA, Quad RGB Input VIC (Option) 103668 
PCA, Quad Standard Decoder VIC (Option) 103545 
PCA, Scan Reversal 102585 
PCA, Video Input Card 102597 
Power Cord, 110 VAC 103253 
Series 220 Service Manual  6-1