Hughes JVC Projector 250 Sc Service Manual

Chapter 7---Troubleshooting
Model 250 Service Manual 7-23
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...

Chapter 7---Troubleshooting
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Model 250 Service Manual
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...

Chapter 7---Troubleshooting
Model 250 Service Manual 7-25
7.5 Troubleshooting Guide
Table 7-3 lists some common projector problems, what to check when problems
occur, and offers possible solutions. It indicates the section in this Service Manual
that provides some related information on the problem. If the User’s Guide
contains pertinent information, the appropriate section will be given.
Table 7-3  Troubleshooting Guide
Problem Check Possible Solution Section
No Power Main Circuit Breaker on
Projector...

Chapter 7---Troubleshooting
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Model 250 Service Manual
Troubleshooting on the Backplane PCB
The connectors on the Backplane PCB provide one of the more accessible places
to probe voltages and signals that may be useful for troubleshooting purposes (see
Figure 7-18 and associated list of signals and voltages).
Figure 7-17  
Backplane Diagram (left side) 

Chapter 7---Troubleshooting
Model 250 Service Manual 7-27
Figure 7-18  
Backplane Diagram (middle section)
The following is a list of pins that would be helpful for troubleshooting purposes.
Low Voltage Power Supply (J8) High Voltage Power Supply (J7)
Pin # Signal or Voltage Pin # Signal or Voltage
8 /LV_ENA 5 /HV_OK
9 /LV_OK 8 +80 V
10  +24 V_FANS 9 +15 V
11  _5.1 V Stdby 10 -15 V
12  +5.1 V 11 G1 SUPPLY
13 +6.2 V 12 /VA_OK
14 +15 V 1-4 GND
15 -15 V
16 +80 V
17 /COVER_ON
18 /FAN_ENA
1-7 GND
Arc Lamp...

Chapter 7---Troubleshooting
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Model 250 Service Manual
Figure 7-19  
Backplane Diagram (right side) 

Chapter 7---Troubleshooting
Model 250 Service Manual 7-29 

Chapter 8---Software and Protocol
Model 250 Service Manual 8-1
8.0  Software and Protocol
Contents
8.1  Software Updating........................................................................................ 8-1
8.2  Importing/Exporting..................................................................................... 8-5
Configuration ............................................................................................. 8-5
Exporting...

Chapter 8---Software and Protocol
8-2 Model 250 Service Manual
!
 Cursor=Block & Blink
!
 Terminal Font=Fixedsys 15
!
 Translation=None,
!
 Show Scroll Bars=On
!
 Buffer Lines=100
!
 Use Function Arrow
!
 Control Keys for Windows=Off
Select OK.
6. Under Settings select Text Transfer=Standard Flow Control. Select OK.
7. Under Settings select Communications and choose;
!
 Connector=select the PC port being used
!
 Baud Rate=9600 or 19200 (depending on the System Controller
Switch block Pos 4-see note below...

Chapter 8---Software and Protocol
Model 250 Service Manual 8-3
 ***WARNING: IMPROPER USE MAY MAKE THIS SYSTEM 
UNBOOTABLE*** (This warning relates to the
Flash Memory  updating that occurs in Step
11D. Do not turn projector  power off while the
Flash Memory is updating)
 Memory buffer reset to 0xff
 Begin your S-Record upload now (Esc to abort).
 11B. From the Windows Terminal Menu (normally in Accessories window),
select Transfers/Send Text File, then select List Files of Type: All
Files, and select the...