PANASONIC TV GL10C

For Panasonic TVs in the family GL10C

Model

Chassis

CT-27SF24V
CT-31SF24V
   CT-31XF24CV
CT-27SF34V
   CT-27XF34CV
   CT-33SF24TV
CT-F29992V
   CT-F29992VV
  CT-F29992LV
   CT-F29992XV

APEDP26
  APEDP266
  APEDP266
    ATPEDP264
    ATPEDP264
  APEDP266
  APEDP264
  APEDP264
  APEDP264
APEDP26

 

Note: May also work with other models not listed. Example, information applied to a CT-27SF14V. See below for other procedures
Many adjustments are available using the 'On Screen Display Menu,' or 'Serviceman Adjustment Mode,' and you should understand what each adjustment does and note any of their values before changing!

  • 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
B1
B2
B3
B4

Sub Color
Sub Tint
Sub Brightness
Sub Contrast
RF AGC1

0-63
0-63
   0-192
0-63
0-127

32
33
123
24
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.

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