Hughes Model 230 Projector Service Manual

							Chapter 5---Troubleshooting
Model 230 Service Manual5-1
5.0    Troubleshooting
Contents
5.1   Status LEDs .............................................................................................5-1
5.2   Error Codes..............................................................................................5-4
5.3   Troubleshooting Guide .............................................................................5-7
5.1   Status LEDs
The illustrations below indicate where various LEDs are located that indicate
proper or improper operation of the System Controller, the Raster Timing
Generator, the Video Processor Board, the Scan Reversal Board, the
Convergence/Deflection Board, the Video Amplifier Board, the Low Voltage
Power Supply, and the High Voltage Power Supply.
Figure 5-1.   Projector rear with cover and rear panel off. 
						

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5-2Model 230 Service Manual
Figure 5-2.   Left side of projector with rear cover off.
Figure 5-3.   Right Side of projector with rear cover off. 
						

							Chapter 5---Troubleshooting
Model 230 Service Manual5-3
Figure 5-4.   Convergence/Deflection and Video Amplifier
LEDs. 
						

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5-4Model 230 Service Manual
5.2 Error Codes
For certain errors that may occur in the Model 230 Projector the software
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
NumberError 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. The first column of
the table lists the error number code that appears on the PC screen. The second
column describes the on-screen text. The third column provides a description of
the problem and any other pertinent information.
Table 5-2.   Error Codes.
Error
NumberOn-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 
						

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Model 230 Service Manual5-5
Error
NumberOn-screen textDescription
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
opening 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
Video Processor.
4.6 “VA PCA Not OK” /VA_OK is High (BAD).
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 
						

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Error
NumberOn-screen textDescription
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 apply
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 
						

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Error
NumberOn-screen textDescription
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 serious 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.
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 contains 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 PowerMain 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 PictureCorrect 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. 
						

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5-8Model 230 Service Manual
Problem Check Possible solution Section
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 LampArc 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
Arc LampBrightness flicker or
picture is very dim.Arc Lamp may have too
many hours of usage.
Replace Arc Lamp.4.4
Image out of
focusSpacer 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
GeometryPicture 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, 
						

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Model 230 Service Manual5-9
Problem Check Possible solution Section
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
ConvergenceLinearity 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
XY
ConvergenceNot enough range in
Red or Blue XY
convergence.Adjust Red or Blue
CENTERING to match
Green.5.5.11
Picture Color
BalanceRed, 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 screenAdjust ILA® bias and
shading.User’s
Guide 5.7, 
						

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5-10Model 230 Service Manual
Problem Check Possible solution Section
limited to corners or
edge.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
ProblemsOut 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® assembly4.15, 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
Picture-Various
ProblemsImage 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
Tether cable
on the
Remote.Possible defective
tether cable. Terminal
port not set up
correctly.Replace tether cable.
Select Tethered Remote
and correct baud rate from
menu.