SECTION 4 CIRCUIT ADJUSTMENTS - 4-1 ELECTRICAL ADJUSTMENTS - How to enter into service mode

Oct 12, 2026

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Service adjustments for KV-25K5/29K5 require entering a dedicated service mode using the Remote Commander RM-883. The procedure includes power-on steps, a button sequence to display TT-- on screen, then navigating the Test Menu to select specific adjustment items. The document provides target settings and measurement guidance for picture, geometry, sound, and destination-dependent TV status, plus sub-brightness, sub-contrast, sub-colour, and multiple IF and tuner AGC adjustments.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages5

Reading Time13 min

AccessFree to download

SECTION 4 CIRCUIT ADJUSTMENTS

4-1. ELECTRICAL ADJUSTMENTS

HOW TO ENTER INTO SERVICE MODE

PICTURE ADJUSTMENTS

GEOMETRY ADJUSTMENTS

SOUND ADJUSTMENTS

TV STATUS

TECHNICAL AND IF/TUNER ADJUSTMENTS

DEFLECTION SYSTEM ADJUSTMENT

TEST MODE 2

KV-25K5/29K5 SECTION 4 CIRCUIT ADJUSTMENTS 4-1. ELECTRICAL ADJUSTMENTS Service adjustments to this model can be performed using the supplied Remote Commander RM-883 . HOW TO ENTER INTO SERVICE MODE 1. Turn on the main power switch and enter into the stand-by mode. 2. Press the following sequence of buttons on the Remote Commander. (ON SCREEN DISPLAY) (DIGIT 5) (VOLUME +) (TV) • ‘TT--’ will appear in the upper right corner of the screen. Other status information will also be displayed. 3. Press ‘MENU’ on the remote commander to obtain the following menu on the screen. TEST MENU > Picture Geometry Sound TV Status AGC Adjust Technical 4. Move to the corresponding adjustment item using the ‘Green’[up] or ‘Blue’ [down] buttons on the Remote Commander. 5. Press the ‘Yellow’ button to enter into the required menu item. 6. Press the ‘Menu’ button on the Remote Commander to quit the Service Mode when all adjustments have been completed. Note :The data shown in the ‘TV STATUS’ table is dependant on destination and country. | PICTURE
R-Drive
G-Drive
B-Drive R-cut-off G-cut-off B-cut-off ID-start
ID-stop
ID- level Bellfo
Sub Colour
Sub Brightness | Adj
Adj
Adj
Adj
Adj
Adj
02
01
01
Adj
Adj
Adj | | --- | --- | | GEOMETRY
V centre
V size V Lin
S Corr
H Cent
H Size
Pin Amp
Corner Pin
Pin Phase
V Bow
V Angle
Upper V Lin
Lower V Lin
Left HBLK
Right HBLK
CD Mode (AV) | Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
Adj
07
07
01 | | --- | --- | | SOUND
Nicam Error Lower
Nicam Error Upper
Nicam Error Rate AGC Gain Level | 20
80 xx [Status only]
xx [Status only] | | --- | --- | | TV STATUS
Destination
Text Language | A/L/E/U/D/B/K/R East/West | | --- | --- | KV-25K5/29K5 TECHNICAL GD-Secam 30 BD-Secam 31 RC-Secam 11 GC-Secam 19 BC-Secam 10 GD-Sports 30 BD-Sports 36 RC-Sports 14 GC-Sports 15 BC-Sports 17 Y-Delay (AV) 07 SUB BRIGHTNESS ADJUSTMENT 1. Input a Phillips colour pattern. 2. Press ‘TEST’‘TEST’ 13 on the Remote Commander. 3. Adjust the ‘Sub-Brightness’ data so that there is barely a difference between the 0 IRE and 10 IRE signal levels. SUB CONTRAST ADJUSTMENT 1. Input a video signal that contains a small 100% white area on a black background 2. Set the picture control to maximum. [‘TT01’] 3. Connect an oscilloscope to Pin 1 of CN504 [A Board] . 4. Enter into the ‘Picture’ service menu. 5. Adjust the ‘R-Drive’ data to obtain the following waveform. 25" 2.21V +/-0.01V 29" 2.52V +/-0.01V R-out Waveform SUB COLOUR ADJUSTMENT 1. Receive a PAL colour bar signal. 2. Connect an oscilloscope to Pin 3 of CN504 [A Board] . 3. Enter into the ‘Picture’ service menu. 4. Adjust the ‘Sub Colour’ data so that the Cyan, Magenta and Blue colour bars are of equal levels as indicated below. Same Level B-Out Waveform Note: Ensure that no signal is applied to the Antenna socket while carrying out the following IF adjustments. SYSTEM B/G, D/K, I & L I.F ADJUSTMENT 1. Input a 38.9Mhz carrier signal at 100dBuV to Pin 11 [IF output] of the tuner [TU101] . 2. Measure the voltage at Pin 17 of [IC101] . 3. Adjust L103 [A Board] to obtain a voltage of 2.5V +/ -0.3V. SYSTEM L BAND 1 I. F ADJUSTMENT 1. Input a 34.0MHz carrier signal at 100dBuV to Pin 11 [IF output] of the tuner [TU101] . 2. Select ‘system L’ + C00 [channel 00] . 3. Measure the voltage at Pin 17 [IC101] . 4. Adjust RV101 [A Board] to obtain a voltage of 2.5V +/ -0.3V. TUNER AGC ADJUSTMENT 1. Receive a signal of 65dBuV / 75 ohm terminated, via the tuner antenna socket. 2. Connect a voltmeter to JW130 [A Board] . 3. Enter into the ‘Test Menu’. 3. Select the ‘AGC Adjust’ menu item. 4. Adjust the data using the Yellow and Green buttons on the Remote Commander to obtain a voltage of 3.0V +/ -0.2V. A

FAQs

How do you enter Service Mode for KV-25K5/29K5 using the Remote Commander RM-883?

Turn on main power and go to standby, then press the specified remote button sequence (including digit 5, VOLUME+, and TV). Confirm that 'TT--' appears on the top-right of the screen, then use MENU to open the Test Menu.

What should be adjusted for Sub Brightness and what is the target condition?

Input a Phillips colour pattern, run the TEST/TEST 13 function, and adjust the 'Sub-Brightness' data so the difference between the 0 IRE and 10 IRE signal levels is barely visible.

How is Test Mode 2 entered and what can it control?

Press the 'TEST' button twice so OSD 'TT' appears, then press the two-number codes to access functions. To release, press 0 twice, switch the TV to standby, or press the TV button on the remote commander.

Oct 12, 2026

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