PANASONIC TC26LX20 TC32LX20 TC22LR30 TROUBLESHOOTING SERVICE MODE
PANASONIC TC26LX20 TC32LX20 TC22LR20 - Shutdown problems
SELF CHECK FUNCTION FOR TV SECTION- The self check feature is designed to check if a particular component is functioning and it does not actually diagnose the problem. For example; "Tuner check OK" doesn't necessarily mean that it is OK. It pings or selectively addresses that particular device via the IIC by determine if it exists. The same holds truce for the Global Core ICs, the MTS, the sound circuit, and audio/video switches. It should be noticed that the displayed result could be misleading by indicating that it is OK.
SELF CHECK ACCESS
- To access self check mode, press the "Volume Dn" button on the 'TV', and the 'Sleep" button on the remote at the same time. To 'Exit' this mode, press any key on the remote control.
The On-Screen Display
SELF CHECK
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MEMORY
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OK
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TNR 1
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OK
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SOUND
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OK
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MTS
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OK
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MTS-R
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OK
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AVSW-V
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OK
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ASW-A
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OK
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GC3FM
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OK
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GC3FS
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OK
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GC3I
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OK
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HDMI
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OK
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DVD
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OK
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INCH
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22
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PROG
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1.01.02
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CHECKSUM
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6DCC
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EEPROM
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1.00.00
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TIMER
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0112
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ROM COR
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0.00.00
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MAIN
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0102
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SERVICING TV PORTION & TO ENTER SERVICE MODE
- To enter service mode ON, Hold Down the "Volume Down" button on the "TV" while pressing the 'Display" button on the remote control within [2] seconds. The service adjustment mode will be displayed on the screen. Service mode is broken down into two categories, Main Items, which are displayed on the menu screen and Sub Items.
- To navigate the adjustment mode, use number buttons [1] & [2] on the remote control to change the Main Menu item. The number[1] button will cycle from the Main option . The number [2] button will cycle in the reverse direction.
- Use number buttons [3]&[4] on the remote control to cycle through the Sub Items, until the proper adjustment is reached.
- Adjustments of sub item is made using the "Volume" button on the remote control.
- Data changes are saved automatically when switch to Sub or Main items, or when 'Exit' the service mode.
- To "Exit" service mode, Switch OFF the power button on the Main Unit [or] press the 'Power" button on the remote control.
When the DVD adjustments are accessed, the unit switches to DVD mode.
The software version of the DVD player can be displayed here.
- If you are making adjustments in service mode, keep a record of data value before making the adjustments.
SERVICE ADJUSTMENTS MODE CHART
MAIN ITEM
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SUB ITEM
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REMARKS
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SAMPLE DATA
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MAIN
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Y GAIN
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VIDEO LEVEL
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7D
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B-Y
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VIDEO LEVEL
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96
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R-Y
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VIDEO LEVEL
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52
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SUB
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ANGL
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R-Y DEMODULATION
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20
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BYGN
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B-Y GAIN
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A6
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BRIGHT
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SUB BRIGHT
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7B
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COLOR
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SUB COLOR
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54
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TINT
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SUB TINT
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6A
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BACK-L
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SUB BACK LIGHT
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3C
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R-CUT
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3C
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G-CUT
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3C
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B-CUT
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3C
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GAMMA
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RED
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PANEL LUMINANCE
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AD
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GREEN
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PANEL LUMINANCE
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AD
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BLUE
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PANEL LUMINACE
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AD
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OPT
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OPTOO
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TV
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00
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OPTDO
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DVD
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00
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DVD
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CHROMA
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13
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CB GAIN
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1C
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CR GAIN
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01
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VOLMAX
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F0
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SERVICING DVD
Service Tools Needed
- DVD test Disc [DVDT-S01 & DVDT-S15] (Supplied from SPC)
- Extension cable[REKZ0214](Supplied from SPC)
- Shakanabi Software: Not supplied as service parts. This software is used for the repair of Circuit Board M8.
- Data change CD-R: Not supplied as service parts. This CD-R is used for the repair of circit board M8.
M8 CIRCUIT BOARD REPAIR
- Change what is referred to as the model setting data for the software that resides in IC6702. This converts TC-22LR30 [DVD portion] to that of a DMR-E65 for ease of troubleshooting. This is accomplished through the use of the Shakanabi Software.
- Repair Circuit board M8 as would need repair the Digital C.B.A. that resides in the DMR-E5 DVD recorder. Upon completion of repairs, change the model setting data back to that of the TC-22LR30. Use the Data Change CD-R to accomplish this task.
Use the extents ion cable between M8 board and the RD board.
Extension cable has A/V output signal switches. Output signals can be
switched from the M-8 board side or RD board side. When checking the
M8 broad, turn the switches to the M8 board side. When checking
RD board, turn the switches to the RD board side.
TROUBLESHOOTING
- These are some of the screen display symptoms and conditions that may arise as a result of an error or problem that may occur either during operation or while entering self-check mode.
Screen display
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Symptom/Condition
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Remedy
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Memory
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No picture/no audio
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Replace the DG board
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Sound
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No picture/no audio from tuner
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Check audio circuitry on the A-Board
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MTS
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No audio from tuner.
Switching of Stereo/Sap/Mono for audio from speaker not work
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Check the TA tuner and the 30V
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MTS-R
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Audio from tuner cannot be recorded. Switching of Stereo/SSAP, Mono for
recording does not work.
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Check MTS IC3299 and Audio Circuitry on A board.
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AVSW-V
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No picture
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Check video switch on A Bd
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AVSW-A
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No audio
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Check audio switch on A bd
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GC3FM
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No picture from tuner and video in signal
|
Replace the DG board
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GC3FS
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No picture from component input signal.
|
Replace DG board.
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GC3l
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No picture
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Replace DG board
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HDMI
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No digital picture/no digital audio from HDMI input
signal.
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Check DV board
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DVD
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Recording/playing does not work. Clock does not work.
DVD Menu cannot be displayed
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Check RD board
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TRN1
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No picture / No audio from tuner
|
Check the TA tuner baord
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