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CHASSIS 14.1 ELECTRICAL ADJUSTMENTS
1.1. Supply Voltage Adjustment Connect a digital voltmeter to the cathode of diode D611 at the AV1 mode of the TV and set the screen voltage to the minimum with the screen potentiometer. Adjust the main supply voltage (B+) with P601 potentiometer to the following value (after adjustment, readjust Screen voltage). 20" : 119 VDC 21" : 116 VDC (117 VDC for A51EAL155X01) 25" : 145 VDC 28" : 145 VDC (147 VDC for A66EAK071X11) 28" Pure Flat 16/9 : 140 VDC 28" Super Flat 16/9 : 140 VDC 29" : 125 VDC 32" Pure Flat 16/9 : 140 VDC 32" Super Flat 16/9 : 131 VDC 33" : 158 VDC
2. SERVICE ADJUSTMENTS
You need the special service remote control to enter and exit the service menu of the TV (you can order it from the manufacturer). All buttons of the Service RC are same with the user remote control, only service menu In / Out is added to it (please see the picture below). Navigation Service In/Out P+ / PV+ / VOK : Enters to / exits from the Service Menu : Moves upward / downward inside the menu : Changes the values or options : Changes the brightness, contrast values to 00, 3F and preset values sequentially (Its OSD is shown). When P+ / P- buttons pressed the service menu is re shown.
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2.1. AGC Adjustment · · · Apply an RF signal with amplitude 65±1 dBuV to the antenna input of TV with a pattern generator (switch sound carrier to Off and switch "Video Ext" to On). Switch on the Service Menu with the Service RC and find the AGC with P+ / P- buttons. Measure the 38.9 MHz signal on pin 11 (IF) of Tuner with an oscilloscope. Adjust "AGC" to get following values: Secam LL' (Stereo) or PAL I Non-multimedia : 500 ± 20 mVpp PAL I Multimedia : 600 ± 20 mVpp Secam LL' (Mono) : 350 ± 20 mVpp PAL/SECAM BG Dolby Prologic : 550 ± 20 mVpp Other versions : 220 ± 20 mVpp Exit from the service menu with the Service RC.
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2.2. Screen Adjustment · · · · · · Select Brightness to 32, Contrast to 40 and Saturation to 20. Enter the Service Menu with the Service RC and select "SCRN" option with P+ / P- buttons and switch to ON with V+ / V- button. For 29" sets press "OK" button afew times in the "SCRN" item to get "BRI 00" on the screen. Adjust the screen potentiometer to the level where the screen is just black (For 29" sets press "OK" button to get "BRI32"). By pressing one of V+ / V- buttons, get the picture (SCRN is switched to Off). Exit from the Service menu.
2.3. Geometry Adjustments · · · · · · · · · · · Apply a FUBK or Philips Test pattern. Enter Service Menu with Service RC and select "VSLP" option with P+ / P- buttons (In this option, the upper half part of the pattern is shown and lower half part is blanked). Adjust VZOM to 20 for 4/3 sets and 19 for 16/9 sets. Adjust VSCR to "1F" ("20" for 32" Super Flat 16/9) Adjust VSLP such that middle line of the pattern is cut. Adjust vertical position with VSHT, vertical linearity with SCOR and vertical height with VAMP. For 4/3 sets, adjust the horizontal amplitude with EWW. For 16/9 sets, adjust the 16/9 horizontal amplitude with EWW1 and 4/3 horizontal amplitude with EWW (EWW value is 21 unit lower than EWW1 value). For 16/9 sets, find the VZM1 option and adjust such that second lines from top and bottom just touches to the edges. Adjust horizontal centering with HSHT, parabola with EWPW and trapezium with EWT. For 4/3 sets, adjust the general parabola of 16/9 mode with EWP1 (it is 8 unit lower than EWPW). For non Secam LL' or Mono versions adjust corner parabola with EWCP. For Secam LL' or Mono versions adjust the upper corner parabola with EWCU and lower corner parabola with EWCL, vertical parallelogram with HPAR, horizontal bow with HBOW. Adjust PWLT and IFOF to the values in the Table of Section 2.6. Exit from the Service Menu.
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· 2.4. White Balance Adjustment · · · · Enter the Service Menu with the Service RC and select "GRN" option with P+ / P- buttons and adjust it to "25" with V+ / V- button. Adjust RED and BLUE for white balance. If white balance can not be adjusted properly change GRN value. Adjust BLOR and BLOG for red and green cut off (available for only Secam LL' and mono versions). Exit from the Service menu. 2.5. Feature Options Tuner STD Head SCRN AV SSTD STYP Toptext TXT table Lang Hotel Subwoofer CRT Peak1 : Panasonic, Phillips, Sharp, Temic : STBY-On (Default, Automatic switch off is active), STBY-Off (can be used during repair) : Yes (Headphone available), No : Off, On (used for screen adjustment) : 01 (1 Scart), 03 (2 Scarts), 04 (2 Scarts + Front AV), 05 (2 Scarts + Front AV+ SVHS) : BG-Stereo, BG-Nicam, I-Nicam, BG-DK, BG-DK-Nicam (stereo versions) BG only, I only, BG+DK, BG + LL' (mono versions) : NICAM On (for Secam LL' sets), NICAM Off : Yes (available), No Note: Available in the SW version of Secam LL' and Mono : West (West Europe), East (East Europe), Cyrillic, Greek : A (English, German, French, Italian, Spanish, Turkish, Dutch, Greek) B (English, Swiss, Danish, Hungarian, Norwegian, Roman, Polish, Russian) : On (Hotel Mode), Off (TV Mode) Available in the SW version of Secam LL' and Mono : Yes (available), No : 4/3, 16/9 : Yes (16/9 sets), No (4/3 sets)
VIM Car
: Yes (Default) : Yes (Default)
2.6. Factory Settings for Service Mode Notes: 1. 2. 3. 4. 5. Values given in Table 1 are typical values and can vary according to the CRT type. PF means Pure Flat and SF means Super Flat. The values in the table are hexadecimal numbers. EWCP is not available in Secam LL' and Mono version. The adjustments with "*" sign are available in Secam LL' and Mono version. 25" 28" 20 03 28 23 20 20 08 13 14 11 1C 0B 2D 9E 1F 20 0E 2C 25 2A 04 00 3D 01 01 00 00 20 0B 29 30 20 32" 32" 28" 28" 29" 16/9 16/9 33" 16/9 16/9 SF PF SF PF SF 3A 20 03 32 0B 22 20 08 0E 14 11 1C 28 3C 9A 1F 1F 0E 2C 25 2A 04 00 25 01 01 00 00 20 0B 29 30 19 3C 20 03 32 23 20 20 08 13 14 11 1C 2A 3D 9E 1F 20 0E 2C 25 2A 04 00 27 01 01 00 00 20 0B 29 30 19 20 03 28 29 1E 20 08 10 14 19 1F 08 38 A0 1F 1F 0E 2C 25 2A 04 00 3C 01 01 00 00 20 0B 29 30 20 36 20 05 28 23 20 20 08 0A 14 11 1D 2C 3F A4 1F 21 0E 36 25 29 04 00 21 01 01 00 00 20 0B 29 30 19 3D 20 05 28 24 21 20 08 10 14 07 1D 2D 3D A3 20 1E 0E 2C 25 2A 04 00 28 01 01 00 00 20 0B 29 30 19 20 03 28 19 24 20 08 13 14 11 24 0B 2E A4 1F 26 0E 2C 25 2A 04 00 3D 01 01 00 00 20 0B 29 30 20
20" EWW1 BRI CDR CON EWCP HSHT HUE PEAK EWPW SAT SCOR EWT EWPW1 VAMP VZM1 VSLP VSCR VSHT AGC RED GRN BLUE YDLY EEPE EWW HPAR * HBOW * BLOG * BLOR * IFOF * PWLT * EWCU * EWCL * VZOM Table 1 East West Width (for only 16/9 sets) Brightness Cathode Drive Level Contrast East West Parobolla on the corners Horizontal shift Sharpness Peaking EW parabola width Saturation S correction East West Trapezium 16/9 mode parab. width (for only 4/3 sets) Vertical amplitude Vertical Zoom (for only 16/9 sets) Vertical slope Vertical S Correction Vertical shift Automatic gain control Red level Green level Blue level Luminance delay Reset the eeprom, all values lost East West Width (EWW1-21 for 16/9 sets) Horizontal parallelogram Horizontal bow Black level offset green Black level offset red Offset IF demodulator Peak white limiting EW upper corner EW lower corner Vertical zoom 20 03 28 20 20 08 14 11 37 A3 1F 20 0E 2C 25 2A 04 00 00 00 20 04 20
21" 20 03 28 20 20 08 14 11 2E A3 1F 1E 0E 2C 25 2A 04 00 00 00 20 04 20
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2.7. Exit from Service Menu During exit from service menu, the software version and feature options (hexadecimal number) are shown on the screen.