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Neki Serviserski mod za Panasonic TV

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Lucky2001

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icon Neki Serviserski mod za Panasonic TV30.01.2004. u 15:08 - pre 214 meseci
Notes on how to Enter and Leave Panasonic TV Service Menu Mode, and to adjust some items.

The reason for this document is that so very many of the recent crop of Panasonic TVs have poor picture pincushion adjustment. Many folks are asking about it, and how to get into and out of the service mode. The unfortunate part is that there are no real pincushion adjustments available to correct the bow-in/bow-out on the left and right side of the picture, or the display tilt and trapezoid shape. Bah Humbug! Cheap televisions built in 1960 had better picture shape adjustments than these modern Panasonics. My previous 27" Panasonic, purchased more than 10 years ago, had perfect pincushion adjustments. It is truely unfortunate that Panasonic is pinching pennies to such an extent that they are leaving out the bare necessities. Panasonic reliabilty, color and video quality are good, but the pincushion stuff is horrible. I believe that Panasonic is hurting itself by getting just a little too cheap. I doubt that I'll buy another, and never without viewing the actual one I'm buying before hauling it home.

This is known to be good for Panasonic models CT27D20 and CT27D21, and it is probably relevant for many other models of Panasonic TVs as well.

Huh?! If you don't know what this stuff below means then I suggest leaving it alone. Just about the only things to adjust without test equipment are the 'D' menu items which adjust (as best we can) for picture position and overscan. If you need more info then call Panasonic and order the service manual.

Disclaimer: There are no guarantees here, and you are at your own risk. If you break your TV then don't blame me! There may even be mistakes in this document because I wrote it from memory and from notes, not by copying Panasonic stuff.

To enter service mode:

With remote or TV front panel controls.
1. Select the SETUP icon and select CABLE tuner mode
2. Select the TIMER icon and set the SLEEP time for 30 minutes.
3. Exit the Action menus.
4. Tune to Channel 124
5. Adjust volume to zero.

Then with the front panel control:
6. Press the VOL < button (decrease) on the TV. A red "CHK" appears in
the upper left corner of screen.

You are now in service mode.

Switch to video or TV/cable input and tune to a channel with something to look at.
Press the POWER button on the remote to select one of several service menus.
Watch the lower right screen for the menu letter, menu item #, and item value.

B = SUB-DATA adjustments
C = Cut-off adjustments
D = Pincushion adjustments (V & H size & posn, but not real pincushion stuff goshdurnit)
M = MTS adjustments
P = PIP adjustments (models with PIP only)
S = Options adjustments
X = Comb filter adjustments.

Within each menu, use the channel up/down to select the item.
Use the volume up/down to adjust the value of the item. It is an
EXCELLENT idea to step through EVERY item and write down ALL the existing values before you adjust ANYTHING. Really! :-)

(menu item - description - default value)

B0 - sub color - 31
B1 - sub tint - 31
B2 - sub brightness - 31
B3 - sub contrast - 16
B4 - sub tint video - 16
B5 - sub color video - 16
B6 - sub tint comp - 63
B7 - sub color comp - 31
B8 - sub sharp tv/video - 10
B9 - sub sharp s-vhs/comp - 31
BA - sub contrast fixed - 15

C0 - cut off R - 128
C1 - cut off G - 128
C2 - cut off B - 128
C3 - user brightness - 31
C4 - G drive - 64
C5 - B drive - 64
C6 - Drive C temp - 8
C7 - contrast C temp - 5

D0 - H position - 16
D1 - V size - 31
D2 - Vertical 'S' correction - 4
D3 - V linearity - 14
D4 - E/W Trapezium - 8
D5 - V AGC - 1
D6 - V position - 1
D7 - V centering - 63
D8 - V centering DAC SW - 0
D9 - V-Blk Start Phase - 12
DA - V-Blk stop phase - 14

M0 - Input level - 33
M1 - low level separation - 6
M2 - high level separation - 25

P0 - pip color - 92
P1 - pip tint - 54
P2 - pip bright - 22
P3 - pip contrast - 80
P4 - up 1/9 size - 26
P5 - down 1/9 - 143
P6 - left 1/9 - 10
P7 - right 1/9 - 101
P8 - up 1/16 size - 26
P9 - down 1/16 - 160
PA - left 1/16 - 10
PB - right 1/16 - 116
PC - pip freerun - n/a
PD - pip YDL - 4

S0 - ABL gain - 3
S1 - ABL point - 3
S2 - RGB brightness - 8
S3 - RGB Gamma - 1
S4 - Color Gamma - 1
S5 - VSM-G - 0
S6 - BS point - 7
S7 - Clock Adjust - 128
S8 - Loudness Comp - 31
S9 - Caption Dig Filt Sw - 0
SA - Caption Scroll - 1
SB - RGB Matrix - 6
SC - RGB Matrix Comp. - 5

X0 - Clip level - 152
X1 - CSOK - 12
X2 - Comb limit - 24
X3 - Comb core - 41
X4 - Comb RF delay - 20
X5 - Comb video delay - 18
X6 - Comb VMLM - 90
X7 - Comb VMCO - 24
X8 - Comb sharpness - 123
X9 - Comb VM level - 255
XA - Comb VMPKF - 1
XB - H lock mode - 1
XC - H lock - 70
XD - H sep 1 - 313
XE - H sep 2 - 266
XF - Sub H lock mode - 0
X10 - Sub H lock - 70
X11 - Sub H sep 1 - 313
X12 - Sub H sep 2 - 266

To EXIT service mode:
On the TV front panel, press the ACTION and POWER buttons simultaneously and hold for at least two seconds. When you release the buttons the TV will reset.
Then you get to go back into the action menus, set the clock, make ALL your personal preference settings again, favorite channels, and any channel labels that you may have set up (what kind of stupidity is this?). Each time you leave service mode you get to do it all over again, so write down your personal preferences like color and tint settings, and favorite channels
 
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Lucky2001

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icon Re: Neki Serviserski mod za Panasonic TV30.01.2004. u 16:46 - pre 214 meseci
Jos jedan slican sa malom modifikacijom

Terminology

VU: Volume Up
VD: Volume Down
CU: Channel Up
CD: Channel Down
SM: Serviceman Mode
Entering serviceman mode

Serviceman mode (SM) can be entered in two ways, Remote Method and Other Method (back of case open).


Remote Method


In SET-UP icon, set antenna to CABLE
In TIMER icon, set sleep timer to 30
Exit menus and tune to channel 124
Adjust volume to 0
Press volume down (VD) on control panel and red 'CHK' will appear in the upper left corner
To toggle between Serviceman and Aging Modes press Action and VD on the control panel

Other Method


Short test point FA1 to cold ground FA2 (A-board: TP pin 8 to pin 3)
Receiver is in Aging Mode with yellow 'CHK' in the upper-left corner
Press Action and VU on the control panel and 'CHK' should be in red
The set is now in Serviceman Mode, of which there are five (5) separate Serviceman Modes:


'B' VCJ Sub Adjustments
'C' W.B. Adjustments
'D' Pincushion Adjustments
'S' Options Adjustments
'CHK' Normal use of VU/VU and CU/CD buttons (no adjustments can be made)


Use the Power button on the remote to switch between these modes
Accessing and Modifying the Service Adjustments

Once you have selected one of the four adjustments modes use the CU and CD buttons to move between settings.
Within a setting use the VU and VD buttons to adjust the level or value. NOTE: Write down any original values before changing!
The Four Adjustments Modes

I. DAC Adjustments

Mode Adjustment Range Default
B0 Sub Color 0-63 32
B1 Sub Tint 0-63 33
B2 Sub Brightness 0-192 123
B3 Sub Contrast 0-63 24
B4 RF AGC1 0-127 43
B5 Sub Brightness for AI 0-63 16


II. White Balance (W.B.) Adjustments

Mode Adjustment Range Default
C0 R Cut-Off ** 2 20
C1 G Cut-Off 0-255 214
C2 B Cut-Off ** 2 20
C3 User Brightness 0-63 31
C4 Sub Brightness 0-192 123
C5 R Drive 0-255 119
C6 B Drive 0-255 91
C7 R Drive Offset - Cool 0-63 12
C8 B Drive Offset - Cool 0-63 12
C9 R Drive Offset - Warm 0-63 20
CA B Drive Offset - Warm 0-63 12

** Note: Range is in steps:
0 20 - 0 235
1 20 - 1 235
2 20 - 2 235
3 20 - 3 235


III. Pincushion Adjustments

Mode Adjustment Range Default
D0 Vertical Size 0-127 68
D1 Vertical Linearity 0-63 37
D2 Vertical S Correction 0-63 12
D3 Horizontal Size 0-63 48
D4 Horizontal Center 0-31 12
D5 E-W Parabola 0-63 14
D6 Trapezoid Compensation 0-63 31
D7 E-W Corner 2 0-15 12
D8 E-W Corner 1 0-15 9
D9 Vertical EHT 0-15 8
DA Horizontal EHT 0-15 8
DB Vertical DC 0-63 31


IV. Options Adjustments

Mode Adjustment Range Default
S0 Pre shoot/Overshoot 0-7 4
S1 Black Expansion Gain 0-15 7
S2 White Gamma Level 0-15 15
S3 White Gamma Gain 0-15 15
S4 Small Gamma Gain 0-15 7
S5 R-Y Demodulation Angle 0-31 12
S6 R-Y Demodulation Gain 0-63 23
S7 G-Y Ratio SW 0-3 1
S8 White Letter Compensation 0-15 4
S9 White Letter Slice Voltage 0-15 5
S10 Filter 0-63 30
S11 Low Frequency Separation 0-63 39
S12 High Frequency Separation 0-63 22
S13 Clock Adjustment 0-255 165
S14 Scroll Output, Font Mode 0-2 1
S15 ID Positioning Mode 0-2 0
S16 PIP Chroma Saturation 0-127 39
S17 PIP Contrast 0-127 36
S18 PIP Tint 0-63 10
S20 PIP Position 1/16 Left 0-255 10
S21 PIP Position 1/16 Right 0-255 116
S22 V1 Gain 0-15 8
S23 S-AI Music 0-255 30
S24 S-AI Vocal 0-255 60
S25 S-AI Off 0-255 240
S26 S-AI Up Step 0-15 2
S27 S-AI Down Step 0-15 4
S28 Auto Bass Max 0-63 50
S29 Auto Treble Max 0-63 55
SA Switches (TV) 0-255 36
SB Switches (Video) 0-255 0
SC Switches (Video) 0-255 36
SD Contrast Sensitivity 0-255 109
SE Input Level Alignment 0-63 46
SF Stereo PLL VCO 0-63 27
S1A PIP Position 1/9 Upper 0-255 26
S1B PIP Position 1/9 Lower 0-255 146
S1C PIP Position 1/9 Left 0-255 10
S1D PIP Position 1/16 Right 0-255 101
S1E PIP Position 1/16 Upper 0-255 26
S1F PIP Position 1/16 Lower 0-255 163
S2A R Offset 0-40 20
S2B B Offset 0-40 20


All functions may not be available on a particular receiver, and some modes may exist on a receiver that are not listed above. These unknown settings should not be changed!

Checking Purity

When in non-adjustment SM (red 'CHK' in upper-left corner) press the Recall button on the remote to cycle between color modes:


White
Red
Green
Blue
Normal
Exiting serviceman mode


Enter the non-adjustment SM (red 'CHK' in upper-left corner) and press and hold the Action and Power buttons on the control panel for at least 2 seconds.
The receiver will shut off and turn back on to cable channel 3 with a preset sound level.
All programmed channels, caption data and other user-defined settings will be erased.

--------------------------------------------------------------------------------
Other models


For Panasonic CT-34WX50

Just wanted to let you know I checked out your page and enjoyed it. Also, you can add my TV "Panasonic CT-34WX50" to your list. I was happy to see your service mode via the remote worked for me. Thanks!
Brian



For Panasonic TX-W28R3 (and similar models)

The remote control is used for entering and storing adjustments, with the exception of cut-off adjustments which must always be done prior to service adjustment. Perform adjustments in accordance with screen display. The display on the screen also specifies the CCU variants as well as the approximate setting values. The adjustment sequence for the service mode is indicated below.


Set the Bass to maximum position, set the Treble to minimum position
Press the Reveal on the remote control and at the same time press the Volume on the customer controls at the front of the TV, this will place the TV into the Service mode
Press the RED/GREEN buttons to step down/up through the functions
Press the YELLOW/BLUE buttons to alter the function values
Press the STORE button on the preset panel after each adjustment has been made to store the required values
To exit the Service Mode, press the Normalization button
For Panasonic CT-20G6

I tried your instructions for entering the Serviceman Modes on my 20" Panasonic and it worked, despite my tv not being listed! I have a model number CT-20G6, and getting into the serviceman mode was a snap. However, the menus on this particular set are different from those you have. I have Modes 'B', 'C', 'M', 'S', 'P', and 'X'. The 'P' mode is interesting because i don't have PIP. The reason I wanted to get into serviceman mode in the first place was to fix my picture tilt, but unfortuately the 'D' menu you suggested doesn't exist on my set!

 
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Lucky2001

Član broj: 19179
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*.telekom.yu



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icon Re: Neki Serviserski mod za Panasonic TV30.01.2004. u 16:52 - pre 214 meseci
Ovaj mod je posebno zanimljiv za nase trziste :


Panasonic TX-W28R3 (and similar models):

(From: Arpad Kothai ([email protected])).

The remote control is used for entering and storing adjustments, with the
exception of cut-off adjustments which must always be done prior to service
adjustment. Perform adjustments in accordance with screen display. The
display on the screen also specifies the CCU variants as well as the
approximate setting values. The adjustment sequence for the service mode is
indicated below.

1. Set the Bass to maximum position, set the Treble to minimum position,
press the Reveal on the remote control and at the same time press the
Volume on the customer controls at the front of the TV, this will place
the TV into the Service mode.

2. Press the RED/GREEN buttons to step down / up through the functions.

3. Press the YELLOW/BLUE buttons to alter the function values.

4. Press the STORE button on the preset panel after each adjustment has been
made to store the required values.

5. To exit the Service Mode press the Normalization button.

 
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