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Service Adjustments
3P51 ADJUST MENU
1.FACTORY MODE:
(1)Assembly line adjust mode: Press S.M., this mode. (2)Engineer adjust mode: Press CLOCK, P.M. and keys in turn to enter this mode. This
(DISPLAY) and
keys in turn to enter
mode is usually for R&D and engineering department use. (3)Press digital keys to enter every adjust page, use PROG+/- keys to pick adjust items, use VOL+/- keys to adjust the value. (4)Press DISPLAY to quit factory mode.
2.B+ VOLTAGE ADJUST
Measure C600A + voltage, adjust VR641 to get proper B+ voltage according to CRT assembly list requirement.
3. RF AGC VOLTAGE ADJUST
(1)Receive 294.25MHz,60dBcolor bar signal. (2)Enter factory mode and press digital key "4". (3)Measure tuner AGC point voltage, adjust AGC item till the voltage is 2.4V,or till picture noise just disappearsUsually the AGC value is fixed to 27.
4 FINE ADJUST
(1) FOCUS ADJUST
a. Receive cross-hatch pattern signal b. Set picture to" RICH" mode c. Adjust FBT's FOCUS knob till picture is clear
(2) SCREEN VOLTAGE ADJUST(KEY 0 )
a. Set picture to"STANDARD"modewithout signal input; b. Enter factory mode and press digital key"0" c. Adjust FBT's SCREEN knob till VG2 voltage flag changes between "LOW" and "HIGH"press PROG+ key to enter other menu
(3)
HORIZON ADJUST(KEY 1 ):
a. Receive 50HZ monoscope PATTERN. Set TV to standard mode. Press KEY1 to enter factory mode b. Adjust 5HSH(for 60Hz picture,its is 6HSH)to set picture horizontal center to CRT horizontal center. c. Receive 60HZ monoscope PATTERN, repeat above b item
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Service Adjustments
(4)VERTICAL&YUV/RGB HORIZON ADJUST(KEY2 ):
5VSL 50HZ vertical linearity 5VSH 50Hz vertical center 6VSL 60HZ vertical linearity 6VSH 60HZ vertical center 5SCL 5VAM 6SCL 6VAM 50Hz vertical slope correction 50Hz vertical size 60HZ vertical slope correction 60HZ vertical size
a. Receive 50Hz cross hatch signal, set TV to STANDARD mode, press digital key "2" after enter factory mode, adjust 5VSL so that picture's vertical line is just at the bottom of the half picture. b. Adjust 5VSH to set picture vertical center to CRT center. c. Adjust 5SCL to set proper vertical linearity d. Adjust 5VAM to obtain picture's vertical re-display ratio more than 90% . e. If necessary, fine adjust above items. f. Receive 50HZ RGB or YUV cross hatch signal,set TV to STANDARD mode,adjust 5RGH till picture horizontal center is at the CRT center.(OPTION) g. h. Receive 60Hz cross hatch signal, repeat above a,b. f.Receive 60HZ RGB or YUV cross hatch signal,repeat above items.(OPTION)
(5)
OSD POSITION:
4-6-1 Menu OSD position adjustment: Receive 50/60HZ cross hatch pattern. Set TV standard status. Press KEY 2 in factory mode, adjust 5VOF/6VOF and HOF item, to obtain menu OSD at the center of CRT screen; 4-6-2 LOGO position adjustment: Receive 50/60HZ cross hatch pattern. Set TV standard status. Press KEY 7 in factory mode, adjust XMIN,XMAX,YMIN, and YMAX item, to obtain LOGO at the center upto 1/3 of CRT screen. 4-6-3 TELETEXT OSD position adjustment: Receive 50/60HZ TELETEXT signal. Set TV standard status. Press KEY 7 in factory mode, adjust TXMI and 5TYM/6TYM item, to obtain INDEX at the center of CRT screen.
4-2
White Balance Adjustment (Applied in factory)KEY 3
Normally, this chassis can auto adjust white balance, but for some CRT need to adjust white balance carefully by handSet BRIGHTNESS and CONTRAST at normal status , receive GREY SCAL and entering factory mode press KEY 3, set WPR at 31, adjust WPG and WPR to obtain white balance.
4-3
RF.AGC ADJUSTMENT(KEY 4 )
4-3-1 Receive 60dB RF signal. Connect Digital voltmeter positive terminal to tuner AGC terminal and negative terminal to GND. 4-3-2 Enter the AGC item in factory mode by the REMOTE CONTROL. MethodPress key S.M., ,
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in turn to enter factory mode, then
Service Adjustments
press key "4" and select AGC item by PROG+/-. 4-3-3 Adjust "VOL+" and "VOL-" keys to obtain 2.4V Digital voltage meter reading or just no NOISE on screen Press key " " to exit factory mode
5E2PROM INITIALIZTION
(1) E2PROM initialization (KEY 8 )
We can use an empty E2PROM when making the sample TV or repairing,also can use the E2PROM which has been full of data,but you must follow the steps below to initialize the E2PROM. Press the keys CLOCK , P.M., in turn to enter the factory modePress KEY
8,VOL +/- in turn,you may see the OSD"BUSY" after the"INIT"on the screen About a while, the character "BUSY" disappear POWER OFF will then and ON the TV,the initialization is completed
(2)
FUNCTION SETTING (KEY 5 )
" in turn to enter the factory modePress KEY 5 to
Press the keys "CLOCK" , "P.M.", "
enter the setting menu b.Set values to OPTION 1- OPTION 7 c.LOGO setting when powered on or no signal Press key CLOCK in factory menu to enter the LOGO edit modethere are two rowsthe 1st can set the customer's name etcand the 2nd row can set to display the customer's e-mail, phone...Press the keys "PROG +/- "to select the character to edituse keys "VOL+/-" to choose the charater.
The detailed instruction of 3P51
Some items displayed but not mentioned below is not used in 3P51 chassis. .Item Storage address Information of the factory menu Drect key "8" Display string RELEASE2.0; Software Version Range (Index | value) Default value Fixed, not changeable
Initialization
INIT
initialize uninitialize
1 0
0
Press key "VOL +"you can see the character "INIT BUSY" is activeExit the menu and turn off the TV after the character
Instruction
disappearingreopen it can have a success to innitializeThen the program has been storaged in the memorizerand then need to readjust the parameter of the factory menu
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Service Adjustments
.Item Drect key "0" Screen Voltage A level bright line Adjust the screen voltage under Tv standard mode and no signal inputjust can see the line is ok 29 2A 2B 2C 2D 2E 2F 30 37 38 39 3A 3B 3C 3D 3E 31 32 33 5PAR 5BOW 5HSH 5EWW 5EWP 5UCR 5LCR 5EWT 6PAR 6BOW 6HSH 6EWW 6EWP 6UCR 6LCR 6EWT 5VSL 5VAM 5SCL 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 0-63 31 31 19 33 19 33 18 43 31 31 31 33 19 44 10 44 31 10 31 Storage address Display string Range (Index | value) Default value
Instruction
Drect key "1" Horizontal paralellogram 50Hz Horizontal bow 50Hz
Instruction
Horizontal shift 50Hz EW width 50Hz EW parabola/width 50Hz EW upper corner parabola 50Hz EW lower corner parabola 50Hz EW trapezium 50Hz Horizontal paralellogram 60Hz Horizontal bow 60Hz Horizontal shift 60Hz
The above value be adjustedħ10 can be OK,the default value is31
Instruction
EW width 60Hz EW parabola/width 60Hz EW upper corner parabola 60Hz EW lower corner parabola 60Hz EW trapezium Drect key "2" Vertical slope 50Hz Vertical amplitude 50Hz S-correction 50Hz 60Hz
The above value be adjustedħ10 can be OK,the default value is31
Instruction
Vertical shift 50Hz Horizontal shift 50Hz on RGB mode OSD vertical position offset 50Hz 34 35 36
generally ,SCL can be setted to be31 5VSH 5RGH 5VOF 0-63 0-63 0-63 22 38 38
Instruction
Vertical slope 60Hz Vertical amplitude 60Hz S-correction 60Hz Vertical shift 60Hz Horizontal shift 60Hz on RGB mode OSD vertical position offset 60Hz OSD horizontal position offset 3F 40 41 42 43 44 45
Horizontal shift on RGB mode generally between 30 to 42the direct way is to connect the two Tv's SCARTAdjust the Value 6VSL 6VAM 6SCL 6VSH 6RGH 6VOF HOF
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0-63 0-63 0-63 0-63 0-63 0-63 0-63
31 11 31 23 38 31 42
Service Adjustments
.Item Vertical zoom Storage address 46 Display string VX 0-63 Range (Index | value) Default value 32
Adjust this item when lack of vertical amplitude will lead to the
Instruction
Direct Key "3" Black level off-set R Black level off-set G White point R (Direct Key "Red") White point G (Direct Ke"Green") White point B (Direct Key "Blue")
picture can't be full of the screen,then need to adjust the resistance's(R318,R319) value. RED GRN WPR WPG WPB 0-63 0-63 0-63 0-63 0-63 32 32 31 31 45
The white balance can be adjusted automatically on this machineonly one or two tube need to be adjustedgenerally the value of RED and GRN between 23 to 39,if adjust excessively will lead the picture fadedRemarkbecause of the higher colour temperatureit's normal that you feel a little red Luminance delay time PAL YDFP 0-15 8 This item has the function to adjust the luminance and colour
Instruction
Instruction
Y delay time NTSC Y delay time SECAM Y delay time AV Teletext contrast Mute delay time while switch program
delay,change the NO. on P card,make the boundary of central green and purple accord with the border of above gray pane. YDFN YDFS YDAV 0-15 0-15 0-15 8 8 8
TTBR MUTD
0-15 0-20
15 13
Instruction
Direct Key "4" AGC take-over UOC Volume AGC VOL 0-63 0-63 27 56
Input standard RF signal with 1KHz sound ,measure UOC
Instruction
SUB HUE control IF frequency Cathode drive level
amplitude(location is W101) of output audio RMS value,adjust VOL till it reaches to 0.5Vrms. SHUE IFFS HDOL 0-63 38.9MHz 38.0MHz 0-15 2 3 2 35 2
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Service Adjustments
.Item Storage address Display string Range (Index | value) Default value
Adjust "HDOL" can change the voltage of "R.G.B"obviously,but adjust too high may lead to fade badly,reverse maybe lead to lack
Instruction
of luminance,so should be carefulGenerally it's ok when there is no black screen or picture faded change the channel under the maximal beam current 0.7X 0 1 2 3 0-63 0-63 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 0-100 31 1 Normal 3X 6X
IF AGC speed
SPD
VG2 Brightness TELETEXT brightness control Direct Key "6" Contrast Min pre-set Brightness Min pre-set Colour Min pre-set Sharpness Min pre-set Contrast Middle pre-set Brightness Middle pre-set Colour Middle pre-set Sharpness Middle pre-set Contrast Rich pre-set Brightness Rich pre-set Colour Rich pre-set Sharpness Rich pre-set 65 66 67 68 69
VG2B TRBI 1CON 1BRI 1COL 1SHP 2CON 2BRI 2COL 2SHP 3CON 3BRI 3COL 3SHP VL05 VL20
25
10 10 0 0 60 40 45 60 100 100 100 100 40 65 83 88 95
Volume inflexion Pre-set
VL40 VL60 VL80
If VOL05 set to 40,it means when VOLUME is set to 05 by
Instruction
opening time control Direct Key "7" Screen saver / Logo Left position Screen saver Right position Screen saver Top position Screen saver Bottom position Teletext Horizontal position 6A 6B 6C 6D 6E
user,the internal Volume is 40.This function is used to adjust speaker sound level-VOLUME OSD curve RGBL XMIN XMAX YMIN YMAX TXMI
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0-25 0-255 0-255 0-63 0-63 0-255
8 44 186 4 37 40
Service Adjustments
.Item Teletext Vertical position 50Hz Teletext Vertical position 60Hz Storage address 6F 70 Display string 5TYM 6TYM 0-63 0-63 Range (Index | value) Default value 38 38
Instruction
Direct Key "5" NVM option 1 VG2 Alignment mode 71 OP1 Bit 0 0 AVG 1 VSD 18 0
VG2 is usually set to 0.Receive 49.75MHZ PHILIPS signal. press key "PM" to set picture to standard mode, adjust FBT's SCREEN VOLTAGE knob, if the screen voltage is too high, the OSD "high" appears, oppositely, OSD "low" appears, when you see the characters "HIGH" and "LOW" display by turns, it means VG2 is well set. YUV or Yprpb WIDE BAND SOUND PLL BLACK STRETCH AMOUNT AV2 SVHS BLACK STRETCH DEPTH XX NVM option 2 AVL Auto sound in autosearch mode Pan Europe Teletext set Cyrillic Teletext set Farsi Teletext set Arabic Teletext set Sync On Y (YUV/Yprpb mode) Slicing lever NVM option 3 SW1 English Menu Farsi Menu Arabic Menu Turkey menu France Menu German menu Itality Menu Russia Menu NVM option 4 Narrow-band sound PLL window Power mode SW2 English Menu Farsi Menu Arabic Menu Serbian Menu Bulgaria Menu German menu Itality Menu 74 Russia Menu 73 72 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 OP2 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 OP3 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 OP4 Bit 0 Bit 1
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Instruction
YUV off 10% off off 20IRE off 0 off off Off Off Off Off off dependent on noise 0 Off Off Off Off Off Off Off off 0 small standby
Yprpb on 20% on on 30IRE on 1 On On On On On On on Fixed 1 On On On On On On On on 1 large Last Memory
1 0 0 1 0 0 0 11 1 1 0 1 0 0 0 0 255 1 1 1 1 1 1 1 1 114 0 1
Service Adjustments
.Item Geometry control Logo EHT tracking mode Search tuing mode sensitivity Menu half-tone Zoom function NVM option 5 Sound system DK Sound system BG Sound system I CORING0 CORING1 AV3 Switch-off in vertical overscan Power on to last status NVM option 6 "No signal" OSD when no signal Blue screen or black screen 16:9 mode Child lock (Lock local key) Top & bottom bar on Menu Hotel mode Set "POC" bit when no signal Game 76 75 Storage address Display string Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 OP5 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 OP6 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 off off Vertical Normal Off off 0 Off Off Off Off Off off Undefined Off 0 off Black off Off Off Off Off off On On Vert. & EW Reduced On on 1 on On On On On On Vert. overscan On 1 On Blue On On On On On on Range (Index | value) Default value 0 0 1 1 1 0 223 1 1 1 1 1 0 1 1 218 0 1 0 1 1 No use 1 1
Instruction
NVM option 7 AV1 77
OP6 generally fixed to 218 OP7 Bit 0 0 off 1 on 196 0
Instruction
XX
Because of AV1 is back AVif SCART neededno back AV need to set AV1 0 Bit 1 Bit 2 0 Monitor 1 TV 0 1
TV and monitor out select
Instruction
LISTEN PRESET Power on always Noise Reduce Off Noise Reduce On NTSC-M Control switch TrueBass control Comb-filter Control 78 79
Because the output of SCART always follow TV when back AV is SCARTthe value set to1 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 BASS COMB
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off See OP4 bit 1
on Direct On
0 0 0 1 1 0 0
See Table 1 1(FM) off Off 0(QSS) On On
Service Adjustments
.Item NICAM control RGB Control YUV Control NTSC-M Control Direct Key "CLOCK" Logo edit (7 chars. & 2 lines) Logo Text English letter & number etc Storage address 7A 7B 7C 7D Display string NICA RGB YUV M Off Off Off off On On On on Range (Index | value) Default value 0 1 0 0
The LOGO edit function will take effect when Bit3 in OP4 set 1
Instruction
press key `VOL+/-" to choose character and press PROG+/- to choose ASC charater
Table 1 : Noise Reduce Setting for PAL
Noise Reduce On 2.7MHz 2.7MHz 3.1MHz 3.1MHz Noise Reduce Off 3.1MHz 3.5MHz 3.5MHz 3.5MHz OP7 Bit 5 0 1 0 1 OP5 Bit 6 0 0 1 1
* Remark : NTSC system preset to 2.7 -> 3.1MHz.
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