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Hughes JVC Projector 250 Sc Service Manual

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    							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 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 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). 
    						
    							Chapter 7---Troubleshooting
    7-24 
    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 (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 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:
    1. Copy the three lines that appear on the screen.
    2. Note what occurred just prior to this failure.
    3. Call Hughes-JVC at 1 800 392-9666. 
    						
    							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 rear panel.Reset Circuit Breaker. Section 3.2
    Main Circuit Breaker
    fails when reset.Verify input power is
    correct. Replace defective
    Low Voltage Power
    Supply or Arc Lamp
    Power Supply.Section 3.2
    Projector cover not
    enabling interlock
    switch?Reposition projector
    cover.Section 6.1
    No Picture Correct channel input &
    VIC selected?Select correct channel
    and VIC.User’s Guide
    section 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.Section 6.9, 6.10
    Arc Lamp Arc Lamp will not light.
    Clicking noise is heard
    when projector is turned
    on.Replace worn out Arc
    Lamp.Section 4.1
    Clicking noise not
    audible when projector is
    turned on.LVPS, ALPS, or Ignitor
    faulty. Replace LVPS,
    ALPS, or Ignitor.Section 3.3, 3.4
    Arc Lamp ignites but will
    not stay lit.Replace defective Ignitor. Section 3.4 
    						
    							Chapter 7---Troubleshooting
    7-26 
    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 Power Supply (9)
    Pin # Signal or Voltage
    2 /LAMP_LIT
    3 /LAMP_OK
    4 /LAMP_ENA
    5 /COVER_ON
    1, 6 GND 
    						
    							Chapter 7---Troubleshooting
    7-28 
    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 .................................................................................................... 8-6
    Importing .................................................................................................... 8-7
    Null Modem Adapter ................................................................................. 8-9
    8.3  Terminals and Communication Protocol...................................................... 8-10
    Terminals.................................................................................................... 8-10
    Terminal Preferences.................................................................................. 8-10
    Communications Protocol .......................................................................... 8-11
    8.1 Software Updating
    The Model 250 software resides in Flash Memory and is updated via the
    projectors serial Port A. To perform an update, a disk containing the updated
    Boot Software (boot.hex) and/or System Software (zsys.hex) and a PC with
    Windows 3.1 (Windows 95/98 with Procomm Plus fax/modem software) is
    required to perform update.
    Boot Manager Software and System Software are separate products. Each may be
    updated independently. The System Software will depend on a specific version of
    the Boot Manager. Refer to the System Software release bulletin for Boot
    Manager version dependencies.
    To perform software upgrade:
    1. Verify that the projector circuit breaker is off. Use a Null Modem cable to
    connect a PC to the projector’s Serial Port A (Terminal-In).
    2. Start Windows 3.1.
    3. Click on the terminal icon from the Accessories Directory.
    4. From the Terminal menu, select Settings-Terminal Emulation and click on
    DEC-VT-100 (ANSI).
    Select OK.
    5. Under Settings, choose Terminal Preferences.
    !
     Under Terminal Preferences the following selections are appropriate;
    Terminal Modes=Sound
    !
     CR->CR/LF=Both off
    !
     Columns=80 
    						
    							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 this step)
    !
     Data Bits=8, Stop Bits=1, Parity=None
    !
     Parity Check=Off, Carrier Detect=Off, Flow Control=XON/XOFF
    Select OK.
     NOTE:
     Switch position 4 on the switch block at the card edge of the
    System Controller (see Figure 7-2) controls the baud rate for Serial Port A
    for the Boot Manager and System Software. Down=9600, Up=19200.
    Ensure the other SCB switches (1, 2, and 3) are in the Down position.
    8. Turn the projector circuit breaker on while depressing and holding down
    the service mode switch on the System Controller PCB (see Figure 7-1).
    Verify that Boot Manager appears on the terminal monitor. The Power
    On LED stays Red.
    Alternate for Step 9: In Power Off Standby mode, Press Control, Shift
    + _ (underscore), hex IF (international keyboard may vary in key
    placement).
    9. The following should be displayed on the Windows Terminal screen
    (where x.x.0 is the currently loaded Boot Manager version (e.g. 0.9.0 or
    1.1.0).
     –Boot Manager Ver x.x.0 (Service Mode Startup)
     –Copyright (c) 1994 Hughes JVC Technology
     –Command: _
    10. Verify that the Boot Manager version is correct. If it is necessary to update
    the Boot Manager, perform the following steps. If the Boot Manager is
    already up to date, skip to Step 12A to update the System Software.
    11A. Enter the command loadboot at the prompt. You should see the
    following output:
     Command: loadboot
     Boot Manager software update procedure 
    						
    							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 disk and/or directory with the Model 250 software.
    You should see a file named boot.hex. Select this file and press the OK
    button to begin the upload. Uploading takes about 20 minutes (9600 bps).
     11C. During upload, a progress indicator updates the number of records
    received. At the completion of the upload, the system will display the
    following (numerical values are for example only and depend on the
    Boot Manager version):
     S-Records processed: 823
     Upload Successful
     Address Range: 0x00000000-0x00006687
     Bytes Loaded:  26248
     ***WARNING: FLASH WILL NOW BE UPDATED***
     Press Enter to continue, Esc to abort.
     11D. The system has verified that the load module is correct and is ready to
    update the Flash. Press Enter to perform the update (press Esc now to
    abort the update with no changes). While the Flash memory is being
    updated (15-30 seconds), DO NOT turn off the projector circuit breaker
    or the machine could be made unbootable, requiring a new set of flash
    chips to be installed. When the update is complete, the system will
    display the following:
     Reprogramming Flash Sector 0 1
    Boot Manager software update successful
     Command: _
    The Boot software has been successfully updated. To restart the projector
    under control of the updated boot manager, enter the reboot command
    while depressing the service mode switch (see Figure 7-1). The projector
    will now restart with the updated boot manager software.
    NOTE:
     If normal software starts, see Step 9 to reenter Boot Manager.)
    You should see the following displayed, where y.y.0 is the updated Boot
    Managers version. 
    						
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