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JVC AV-27F703 - 27" Real Flat TV, Руководство по обслуживанию

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JVC AV-27F703 - 27

No. 52005

AV-27F703

AV-27F713

AV-27F803

23

ADJUSTMENT OF RF AGC

Item

Measuring
instrument

Test point

Ad justment part

Description

RF. AGC
adjustment

S45:AGC ADJ

1.  Receive a black and white signal (color off).
2. Select 

S45:AGC ADJ

 of the V/C MODE.

3.  Press the MUTING key and turn off c olor.
4.  With the FUNCTION    key to get the noise in the screen

picture (zero s ide of s etting value).

5.  Press the FUNCTION   key several times and step when

nois e dis appears from the screen ( at that time, not to increas e
the value too much).

6.  Change to other c hannels and mak e sure that there is no

irregularity.

7.  Press  the MUTING key and get  color out.

ADJUSTMENT OF FOCUS

Item

Measuring
instrument

Test point

Ad justment part

Description

FOCUS
adjustment

Signal
generator

FOCUS VR
[In HVT]

1.  Receive the cross-hatch signal.
2.  While looking at the screen, adjust the FOCUS VR to the

vertical and horizontal lines  will be thinnest and s harpest
center horizontal line.

3.  Make sure that the picture is in focus even when the screen

gets darkened.

ADJUSTMENT OF DEFLECTION CIRCUIT

Item

Measuring
instrument

Test point

Ad justment part

Description

V. HEIGHT
V. CENTER
adjustment
(4:3)

Signal
generator

D05:V PHASE
D07:V SIZE

V. CENTER SW
(S1421)
[MAIN PWB]

1.  Receive the cross -hatch signal.
2.  Enter the SERVICE MENU.
3. Select 

the 

D05:V PHASE

 of the 2.DEF (D) item, and it c hecks

that the value of 

D05:V PHASE

 is 

0

.

4.  Adjust the  vertical screen  size of the visible screen  top to

90.0% with the 

D07:V SIZE

 and 

V CENTER SW S1421.

＊

 

Bottom is to be loc ated with 85%

～

95% range.

＊

 

It  adjust it by DEF SERVICE 

D13: V LIN.

 And 

D11: VS CORR.

when  vertical linearity is not even.

No .

Setting item

Variable

range

Initial setting

value

S45

AGC ADJ

0

～

127

63

   

Picture
size

(100%)

Picture size (100%)

Screen
size
(90.0%)

Screen size

No .

Setting item

Variable

range

Initial setting

value

D05

V PHASE

0

～

7

00

D07

V SIZE

0

～

127

75

Содержание AV-27F703 - 27" Real Flat TV

Страница 1: ...TS SPECIFICATIONS 2 SAFETY PRECAUTIONS 3 FEATURES 4 HOW TO IDENTIFY MODELS 4 MAIN DIFFERENCE LIST 5 FUNCTIONS 6 SPECIFIC SERVICE INSTRUCTIONS 8 SERVICE ADJUSTMENTS 12 PARTS LIST 33 OPERATING INSTRUCTIONS STANDARD CIRCUIT DIAGRAM 2 1 SERVICE MANUAL COLOR TELEVISION BASIC CHASSIS GJ RM C325G AV 27F803 RM C326G RM C326 AV 27F703 AV 27F713 No A111 ...

Страница 2: ...1 3kV at zero beam current Speaker 2 4 3 4 5 12cm Oval type 2 Audio Power Output 5W 5W Input 1 Rear S Video Video Audio L MONO R Y 1V p p Positive Negative sync provided when terminated with 75Ω C 0 286V p p Burst signal when terminated with 75Ω 1V p p 75Ω 500mV rms 4dBs High Impedance Input 2 Rear Video Component video Audio L MONO R 1Vp p 75Ω Y 1V p p Positive Negative sync provided when termina...

Страница 3: ... tube must be the exact replacements or alternatives approved by the manufacturer of the complete product 8 Do not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anod...

Страница 4: ...losed caption broadcasts can be viewed Built in MTS system BBE HYPER SURROUND system S VIDEO input terminal for taking best advantage of Super VHS Digital Comb filter Improved picture quality Built in EZ SURF system AV 27F803 By pushing the EZ SURF key Back Program Information can be displayed in written from program Information uses a CALL LETTER broadcasting station ID a Network name and a Progr...

Страница 5: ...SSY LC10878 003B A LC10878 004A A LC10878 003B A JVC MARK CM48006 008 C CM48006 009 C CM48006 008 C DOOR LC20628 001C A LC20628 002A A LC20628 001C A KNOB POWER LC31237 001A A LC31237 002A A LC31237 001A A OPERATION SHEET LC31238 004A A LC31238 005A A LC31238 004A A CONTROL KNOB LC20217 004B A LC20217 006A A LC20217 004B A TERMINAL BOARD LC20899 004A A LC20899 004A A LC20899 005A A REMOCON UNIT RM...

Страница 6: ...13 S 1INPUT 1 S VIDEO V L MONO R terminals 2INPUT 2 V L MONO R terminals COMPONENT VIDEO Y PB PR terminals 3AUDIO OUT L R terminals 4AV COMPULINK Ⅲ 5 VHF UHF terminal AV 27F703 S AV 27F713 S AV 27F803 S FRONT PANEL CONTROL 1 2 3 4 5 1 2 4 5 6 3 AV 27F803 S 1INPUT 1 S VIDEO V L MONO R terminals 2INPUT 2 V L MONO R terminals COMPONENT VIDEO Y PB PR terminals 3INPUT 4 L R terminals COMPONENT VIDEO Y ...

Страница 7: ...NUMBERS Key G100 Key HRETURN Key ILIGHT Key JV CHIP Key KEXIT Key LVCR DVD Keys TV VIDEO1 VIDEO2 VIDEO3 0 15 30 165 180 1 2 3 4 12 5 6 8 19 20 13 21 22 18 7 9 16 10 11 14 17 23 15 1TV CATV switch 2VCR DVD switch 316 9 MODE Key 4POWER Key 5INPUT Key 6DISPLAY key 7SLEEP TIMER Key 8HYPER SUR Key Can be changed ON OFF 9VIDEO STATUS Key ATHEATER PRO key BBBE key Can be changed ON OFF CMUTING Key DFUNCT...

Страница 8: ...e upper one REMOVING THE LED POWER SW PWB After removing the rear cover terminal board 1 Remove the 2 screws marked as shown in Fig 1 2 Withdraw the LED POWER SW PWB toward you If necessary remove the wire clamp connector etc REMOVING THE FRONT CONTROL PWB After removing the rear cover terminal board 1 Remove the 2 screws marked as shown in Fig 1 2 Withdraw the FRONT CONTROL PWB toward you If nece...

Страница 9: ...iew for disassembling the AV 27F703 S AV 27F713 S in the same step as for this one Fig 1 C 4 SPEAKER FRONT CONTROL PWB CHASSIS CLAW MAIN PWB POWER CORD TERMINAL BOARD PIP PWB AV 27F803 S REAR COVER A 12 CLAW AV SELECTOR PWB LED POWER SW PWB E 2 D 2 FRONT CABINET 6 AV 27F803 S 4 AV 27F703 S AV 27F713 S B 3D Y C SEP MODULE AV 27F803 S ...

Страница 10: ...EM CONSTANT TABLE 1 and check the setting items If the value is different select the setting item with the FUNCTION keys and adjust the setting with the FUNCTION keys The letters of the selected item are displayed in yellow 6 When adjustment has completed the values store into memory IC automatically 7 Press the EXIT key to return the SERVICE MENU screen 8 Then press the EXIT key again to return t...

Страница 11: ...1 SYS24 CXA1875 00 00 User setting Setting item Setting value Setting item Setting value Use remote controller keys POWER OFF DISPLAY OFF CHANNEL Cable 02 VIDEO STATUS DYNAMIC VOLUME 10 HYPER SURROUND OFF TV VIDEO TV BBE ON PIP SOURCE Cable 04 AV 27F803 S Settings of MENU PICTURE MENU INITIAL SETUP MENU STANDARD LANGUAGE ENG TINT CENTER FRONT PANEL LOCK OFF COLOR CENTER V2 COMPONENT IN NO PICTURE ...

Страница 12: ...llowing functions with the remote control unit User menu preset value MENU ITEM PRESET VIDEO STATUS STANDARD BASS TREBLE BALANCE CENTER HYPER SURROUND OFF TINT COLOR PICTURE BRIGHT DETAIL CENTER MTS STEREO ADJUSTMENT EQUIPMENT 1 DC voltmeter or digital voltmeter 2 Oscilloscope 3 Signal generator Pattern generator NTSC 4 Remote control unit 5 TV audio multiplex signal generator 6 Frequency counter ...

Страница 13: ...1 1 3 HV E1 CRT EARTH BRAIDED ASS Y S1 HVT HVT HVT HVT V CENTER SW IC702 SS S421 IC201 MAIN PWB CN003 PIP PWB CN 400 2 PW F901 DEG B B J6403 J6402 J6401 CN6006 POWER LED POWER SW S7701 D7701 IC7701 SENSOR C CN005 IC101 T111 MAIN VCO CN 500 1 CN 500 3 PIP TUNER IF WHT BLK FRONT T411 SUB VCO IC421 IC621 IC911 memory IC AV 27F803 S only 3D Y C SEP MODULE AV 27F803 S ONLY AV 2 7F803 S only ...

Страница 14: ...DED AS S Y TP R CRT SOCKET PWB TP E CN3005 CN30E2 CN3004 PIP PWB AV 27F803 S TP B TP G V TP E1 TP E2 T4111 SUB VCO IC CN4002 TOP AV SELECTOR PWB J5501 J5502 J5504 AV 27F803 S J5503 CN5001 CN5002 TOP 7 1 6 1 PIP TUNER 3D Y C SEP MODULE AV 27F803 SONLY AV 27F803 S ...

Страница 15: ...Fixed value 3 Basic Operations of the SERVICE MENU 1 How to enter the SERVICE MENU Press the SLEEP TIMER key and set the SLEEP TIMER for 0 MIN Then press the DISPLAY key and VIDEO STATUS key of the remote control unit at the same time to enter the SERVICE MENU screen FiG 1 2 SERVICE MENU screen selection In SERVICE MENU press the FUNCTION key to select any of the SUB MENU items The letters of the ...

Страница 16: ...F D 3 SOU ND A 4 OTHE RS F 5 PIP P IP 6 3L Y C LYC 7 LOW LIGHT 8 H IGH LIGHT 9 RF AFC 10 VCO 11 12C BU S 12 SYSTE M S YS SEL ECT BY OPER ATE BY EX IT B Y EXIT 9 RF AFC TOO H IGH GOOD TOO LOW TU NE R MA IN A FG ON FIN E 11 I2 C BUS I2C BU S ON 12 SYSTEM SYS SY S01 VIDE O IN 5 PIP PI P PIP01 B RIGH T 4 OTH ERS F F01 1 V C S R F 4 3 S TD LOW S01 BR IGH T Do n ot ad just Do n ot ad just 6 3L Y C L YC ...

Страница 17: ...creen 5 Releasing SERVICE MENU 1 After returning to the SERVICE MENU upon completion of the setting adjustment work press the EXIT key again The settings for LOW LIGHT and HIGH LIGHT are described in the WHITE BALANCE page of ADJUSTMENT The setting for MAIN VCO are described in the VCO page of ADJUSTMENT BRIGHT 7 LOW LIGHT RF 4 3 STD LOW S01 BRIGHT 1 V C S SETTING No SETTING ITEM SETTING VALUE 8 H...

Страница 18: ... BRIGHT 64 64 S02 PICTURE 60 60 S03 COLOR 50 50 46 46 S04 TINT 68 68 72 72 S05 DETAIL 38 33 40 35 45 40 S06 BRIGHT 00 01 00 01 01 02 00 00 S07 PICT 08 10 08 10 00 00 00 00 S08 COLOR 00 03 00 03 02 02 S09 TINT 00 03 00 03 11 05 S10 DETAIL 00 00 Initial setting value RF EXT S CV COMPONENT STANDARD THEATER STANDARD THEATER No Setting item LOW HIGH LOW HIGH LOW HIGH LOW HIGH S11 R CUT OFF 30 S12 G CUT...

Страница 19: ...9 EXT 4 3 No Setting item RF 4 3 RF 16 9 EXT 4 3 D01 V FREQ 00 00 03 D18 WVMT BTM 00 01 00 D02 AFC GAIN 00 00 02 D19 EWCR TOP 12 12 D03 H POSI 20 20 D20 EWCR T 00 D04 H POSI 00 D21 EWCR BTM 14 14 D05 V PHASE 00 00 D22 EWCR B 00 D06 V PH 00 D23 EW PARA 36 36 D07 V SIZE 75 75 D24 EW PARA 15 D08 V SIZE 30 D25 V EHT 00 00 D09 V CENTER 32 32 D26 V EHT 00 D10 V CENT 00 D27 H EHT 00 00 D11 V S CORR 09 09...

Страница 20: ...F13 VNR CHK 03 03 F27 XDSID TM 15 15 F14 VCSN TM 05 05 F28 FM TRAP 01 01 3L Y C MODE Do not adjust Initial setting value No Setting item AV 27F703 S AV 27F713 S LYC01 MODE 04 LYC02 VENH 01 LYC03 PDSOFF 00 LYC04 CB 00 LYC05 VNLR 02 LYC06 GSEL0 00 LYC07 GSEL1 01 LYC08 COR 00 LYC09 TRAP 01 LYC10 CHTRAP 00 LYC11 CBPF 00 LYC12 ENHOFF 00 3DY C MODE AV 27F803 S No Setting item Initial setting value No Se...

Страница 21: ...CRID 00 PIP12 R POSI 15 PIP38 NONSED 00 PIP13 UPR POSI 12 PIP39 PIP ADJ 04 PIP14 LWR POSI 11 PIP40 BRI EXT 00 PIP15 PICT LCK 01 PIP41 PCT EXT 00 PIP16 SELDEL 00 PIP42 TNT EXT 00 PIP17 AGCFIX 01 PIP43 COR EXT 00 PIP18 AGCADST 00 PIP44 R D EXT 00 PIP19 AGC 07 PIP45 G D EXT 00 PIP20 BLKINVB 00 PIP46 B D EXT 00 PIP21 BLKINVR 00 PIP47 BRT COMP 00 PIP22 VSPDEL 00 PIP48 PCT COMP 00 PIP23 VSPISQ 01 PIP49 ...

Страница 22: ...NCTION key and select MAIN 5 Confirm that the color change from HIGH LEVEL to LOW LEVEL by CW TRANSF T111 at MAIN PWB and check the SYNC YES 6 Adjust until REFERENCE LEVEL mark turns green And then confirm that the SYNC YES again 7 Press the EXIT key to get out SERVICE MENU SUB VCO adjustment AV 27F803 ONLY Signal generator 10 VCO It must not adjust without signal 1 Receive color bar signal 2 Ente...

Страница 23: ...screen adjust the FOCUS VR to the vertical and horizontal lines will be thinnest and sharpest center horizontal line 3 Make sure that the picture is in focus even when the screen gets darkened ADJUSTMENT OF DEFLECTION CIRCUIT Item Measuring instrument Test point Adjustment part Description V HEIGHT V CENTER adjustment 4 3 Signal generator D05 V PHASE D07 V SIZE V CENTER SW S1421 MAIN PWB 1 Receive...

Страница 24: ...nerator D03 H POSI D15 H SIZE D23 EW PARA D19 EW CR TOP D21 EW CR BMT 1 Receive a cross hatch signal 2 Enter the SERVICE MENU 3 Select the D03 H POSI from 2 DEF D item 4 Adjust byH POSITION to be same size at both side 5 Then adj ust the horizontal size of the visible scr een at both size to 90 with the D 15 H SIZE 6 And adj ust the vertical line at both si de to become linear line by D23 EW PARA ...

Страница 25: ... e s V HEIGHT V POSI H SIZE H POSI Shoul d be fi nished Set the VIDEO STATUS to STANDARD PIP DISPLAY POSITION adjustment AV 27F803 S Signal generator PIP11 L POSI PIP12 R POSI PIP13 UPR POSI PIP14 LW R POSI 1 Receive a black and white signal color off 2 Enter the SERVICE MENU 3 Select the 5 PIP PIP fr om SERVIC E MENU 4 Set the initial setting value of the PIP13 UPR POSI with the key of the remote...

Страница 26: ...e horizontal line that is displayed becomes white using the to keys of the remote control unit 8 Turn the screen VR until the single horizontal line is displayed faintly 9 Press the key to cancel the single horizontal line mode 10 Adjust the BRIGHT level to become the black component shines white slightly 11 Confirm that whether the color ingredient of R G or B is visible to the black component wh...

Страница 27: ...he WHITE BALANCE PIP WHITE BALANCE High Light adjustment AV 27F803 ONLY Signal generator PIP08 R DRIVE PIP10 B DRIVE 1 Receive the black and white signal color off 2 Select the PIP08 R DRIVE PIP10 B DRIVE of the 5 PIP PIP SERVICE MENU 3 Set the corresponding initial setting values with the FUNCTION key of the remote control unit 4 Adjust the PIP08 R DRIVE PIP10 B DRIVE until the screen becomes whi...

Страница 28: ...t S03 COLOR 1 Receive the broadcast 2 Enter the SERVICE MENU 3 Select S03 COLOR of the V C S mode 4 Set the initial setting value of the S03 COLOR with the FUNCTION key 5 If the color is not the best with the Initial setting value make fine adjustment of the S03 COLOR until you get the optimum color Method of adjustment using measuring instrument Signal generator Oscilloscope Remote control unit T...

Страница 29: ...timum tint Method of adjustment using measuring instrument Signal generator Oscilloscope Remote control unit TP B TP E CRT SOCKET PWB S04 TINT 1 Input the full field color bar signal 75 white 2 Enter the SERVICE MENU 3 Set the RFAFC to OFF 4 Select S04 TINT of the V C S mode 5 Set the initial setting value of the S04 TINT with the FUNCTION key 6 Connect the oscilloscope between TP B and TP E 7 Adj...

Страница 30: ...ut the stereo L signal 300Hz from the TV audio multiplex signal generator to the antenna terminal 2 Connect an oscilloscope to R OUT pin of the AUDIO OUT and display one cycle portion of the 300Hz signal 3 Enter the SERVICE MENU 4 Select the A02 LOW SEP of the 3 SOUND A mode 5 Set the initial setting value of the A02 LOW SEP with the FUNCTION key 6 Adjust the A02 LOW SEP so that the stroke element...

Страница 31: ...IT 1 Turn the power switch to on 2 As shown in Fig 1 set the resistor between S1 connector 2 and 3 3 Make sure that the screen picture disappears 4 Temporarily unplug the power plug 5 Remove the resistor replaced S1 connector 2 and 3 6 Again plug the power plug make sure that the normal picture is displayed on the screen Fig 1 4 T502 CONNECTOR RESISTOR 22 0 kΩ Ω Ω Ω 110Ω Ω Ω Ω HEATER R537 FR529 S1...

Страница 32: ...th tweezers and remove the chip part Transistors diodes variable resistors etc 1 Apply extra solder to each lead 2 As shown in the figure push the part with tweezers and alternately melt the solder at each lead Shift and remove the chip part Note After removing the part remove remaining solder from the pattern 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the pattern as in...

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