JVC AV-14F1P(PH) Service Manual Download Page 22

Page: 22 / 27

AV-14F1P

No. 56084

■

X-RAY PROTECTION CHECK

Measuring

Item

Test point

Adjustment part

instrument

Check of

Pins 1 and 3

X-RAY

PROTEC-

[X Connector

TION

on MAIN

PWB]

Description

●

Prepare the following resistor.

15.0k

Ω

1% 1/4W

Turn on the power and receive any signal.

Connect the resistor between pins 1 and 3 of the X connector

on the Main PW Board.

Make sure that the picture disappears.

Unplug the AC power cord.

Disconnect the resistor from the X connector.

Plug the AC power cord and make sure that the picture ap-

pears normally.

X-Ray Protector Operation:

Normally the voltage at point "A" does not exceed the Zener volt-

age of D562. (The voltage at point "A" will be determined by divid-

ing the voltage from HVT (FBT) by R562 and R563.)

When you connect a resistor of 15.0k

Ω

or less in parallel with

R562, the voltage at point "A" is increased, D562 turns ON, and

the X-ray protection circuit is activated. Once it is activated, you

need to unplug the AC power cord to restore the X-ray protection

circuit.

R563

TO HVT

C561

D562

R562

D561

MAIN PWB

15.0k

Ω

1% 1/4W

FR561

X-RAY PROTECTOR

Summary of Contents for AV-14F1P(PH)

Page 1: ... 4 OPERATING INSTRUCTIONS APPENDED 1 1 SPECIFIC SERVICE INSTRUCTIONS 4 SERVICE ADJUSTMENTS 10 STANDARD CIRCUIT DIAGRAM APPENDED 2 1 PARTS LIST 27 BASIC CHASSIS GA2 AV 14F1P COPYRIGHT 2000 VICTOR COMPANY OF JAPAN LTD No 56084 Sep 2000 SERVICE MANUAL COLOR TELEVISION AV 14F1P PH ...

Page 2: ...y VIF Carrier 45 75MHz SIF Carrier 41 25MHz 4 5MHz Color Sub Carrier Frequency NTSC 3 579545MHz PAL M 3 57561149MHz PAL N 3 58205625MHz Aerial Input Terminal 75Ω Unbalanced Power Input Rating AC110 240V 50 60Hz Operating AC90 260V 50 60Hz Power Consumption 42W Picture Tube Visible size 34cm measured diagonally High Voltage 22 5kV 1kV at zero beam current Speaker 5cm 9 cm Oval type 2 Audio Output 2...

Page 3: ...ical to those used in the original circuits Service should be performed by qualified personnel only 2 Alterations of the design or circuitry of the products should not be made Any design alterations or additions will void the manufacturer s warranty and will further relieve the manufac turer of responsibility for personal injury or property damage resulting therefrom 3 Many electrical and mechanic...

Page 4: ... you can easily check its back side CAUTION When erecting the Main PW Board be careful so that there will be no contacting with other PW Board Before turning on power make sure that all connectors are prop erly connected WIRE CLAMPING AND CABLE TYING 1 Be sure to clamp the wire 2 Never remove the cable tie used for tying the wires together Should it be inadvertently removed be sure to tie the wire...

Page 5: ...AV 14F1P No 56084 5 5 2 2 2 CRT SOCKET PWB Within MAIN PWB MAIN PWB SPEAKER REAR COVER A B D D SPEAKER FRONT CABINET C ...

Page 6: ...TANT SET are the same as those indicated in Table 1 If the value is different select the setting item with the MENU 1 4 key and set the correct value with the MENU 2 3 key The selected value will be stored in memory when the MENU 2 3 key is released 4 Press the EXIT key twice to return to the normal screen NAME OF REMOTE CONTROL KEYS Fig 1 SERVICE MENU SELECT BY OPERATE BY EXIT BY IT PICTURE VIDEO...

Page 7: ...ontents Setting value VIDEO 1 AUDIO MONO VARI OUT NO GAME YES CINEMA YES CCD YES RETURN YES SURROUND NO SETTING OF SYSTEM CONSTANT SET Table 1 1 2 MONO PH MONO MTS YES NO YES NO YES NO YES NO YES NO YES NO Setting of Menu Table 2 2 Setting item Setting value Setting item Setting value TINT CENTER SET LOCK CODE Unnecessary to set COLOR CENTER CHILD LOCK OFF PICTURE CENTER AUTO TUNER SETUP AIR BRIGH...

Page 8: ...I 10 EXT COL 11 EXT TINT 12 EXT DTL 13 P N KILL 14 Y S CONT 15 TV Y DL 16 EXT Y DL 17 WPL SW 18 Y GAMMA 19 P N G P 20 COL L SW 21 COL LMT 22 PN C ATT 23 OFST SW 24 OFST B Y 25 OFST R Y 26 C TOF SW 27 TV T FO 28 TV T Q 29 EXT T FO 30 EXT T Q 31 C TRAP 32 C TR FO 33 C TRAP Q 34 FIX B W 35 APA P FO 36 DC TRAN 37 B ST SW 38 B ST PO 39 ABL GAIN 40 ABL PO 41 HALF T 42 DRV G SW 43 NT COMB 44 COIN DET 45 ...

Page 9: ...sistors diodes variable resistors etc 1 Apply extra solder to each lead 2 As shown in the figure while pushing the chip part with twee zers alternately melt the solder at its each lead Then shift and remove the chip part Note After removing the part remove remaining solder from the pattern REPLACEMENT OF CHIP COMPONENT 2 How to install Chip parts Resistors capacitors etc 1 Apply solder to the patt...

Page 10: ... adjustment 7 Preparation for adjustment presetting Unless otherwise specified in the adjustment items preset the following functions with the remote control unit BASIC OPERATION IN SERVICE MENU 1 TOOL OF SERVICE MENU OPERATION Operate the SERVICE MENU with the remote control unit 2 SERVICE MENU ITEMS With the SERVICE MENU various settings adjustments can be made and they are broadly classified in...

Page 11: ... 1 4 key Press to select an item in the Sub Menu 2 3 key Press to select the value of the selected item EXIT key Press to return to the previous screen VIDEO STATUS key In the VIDEO STATUS sub menu screen press to switch between VIDEO STA TUS GAME and VIDEO STATUS CINEMA 2 LOW LIGHT HIGH LIGHT Setting will be done by using the numeral key on the re mote control unit 3 RF AFC CHK Do not adjust 4 VC...

Page 12: ...BY IT TINT G DRIVE COLOR B DRIVE PICTURE R CUT BRIGHT G CUT DETAIL B CUT EXIT GAME SELECT BY OPERATE BY EXIT BY IT TINT G DRIVE COLOR B DRIVE PICTURE R CUT BRIGHT G CUT DETAIL B CUT EXIT BRIGHT BRIGHT EXIT BY IT EXIT SELECT BY OPERATE BY EXIT BY IT 1 PICTURE EXIT SELECT BY OPERATE BY EXIT BY IT 1 OSD HP EXIT SERVICE MENU MAIN MENU SCREEN A SUB MENU PICTURE SUB MENU HIGH LIGHT SUB MENU OTHERS SUB M...

Page 13: ...04 IC701 MENU F901 PW TU001 POWER SW S901 DEG HVT UPPER FOCUS LOWER SCREEN REMOCON RECEIVER POWER ON TIMER VOL CH T FRONT MAIN PWB CRT SOCKET PWB SOLDER SIDE 1 Pin TP 91 B1 2 Pin NC 3 Pin TP E 1 3 IC201 VCO T111 C X 1 3 TP E E1 TP 47B T U CRT EARTH BRAIDED ASS Y TOP ...

Page 14: ... mode and TV mode are linked each other Video mode 8 EXT PIC 9 EXT BRI 10 EXT COL and 11 EXT TINT TV mode 1 PICTURE 2 BRIGHT 5 COL NTSC and 6 TINT When the setting items in the TV mode are adjusted the same values will be set to the linking items in the video mode For example if the value of 1 PICTURE is changed the value of 8 EXT PIC will also be changed accordingly The initial setting values giv...

Page 15: ...63 023 2 OSD VP 000 015 012 3 H CK SW 000 001 000 Setting item Variable range Initial setting value R CUTOFF 000 255 020 G CUTOFF 000 255 020 B CUTOFF 000 255 020 LOW LIGHT Setting item Variable range Initial setting value G DRIVE 000 255 128 B DRIVE 000 255 128 HIGH LIGHT Do not adjust Do not adjust Do not adjust Setting item Variable range Initial setting value RF AFC ON OFF ON FINE 77 77 xx RF ...

Page 16: ... menu screen VCO CW from the SERVICE MENU More specifically in the SERVICE MENU press the MENU 1 4 key to select VCO CW and then press the MENU 2 3 key to enter the sub menu screen VCO CW 3 Confirm that the color of TOO HIGH and TOO LOW changes in yellow as you turn the CW TRANSF At this time check that SYNC YES appears on the screen 4 Slowly turn the CW TRANSF until BELOW REFERENCE changes to yel...

Page 17: ...if necessary 60Hz 1 Receive a cross hatch signal NTSC or PAL M 2 Select the sub menu screen PICTURE from the SERVICE MENU 3 Select 54 H POS 60 with the MENU 1 4 key 4 Confirm the initial setting value of 54 H POS 60 5 Adjust 54 H POS 60 so that the screen will be horizontally cen tered with the MENU 2 3 key 50Hz 1 Receive a cross hatch signal PAL N 2 In the sub menu screen PICTURE select 48 H POS ...

Page 18: ...control unit to produce a single horizontal line 5 Turn the SCREEN VR fully counterclockwise then slowly turn it clockwise to where a red blue or green color is faintly vis ible 6 Use keys 4 9 on the remote control unit and adjust the other 2 colors to where the single horizontal line becomes white 7 Turn the SCREEN VR to where the single horizontal line glows faintly 8 Press the 2 key to stop pro...

Page 19: ...e make fine adjustment until you get the best contrast with the MENU 2 3 key Method of adjustment without measuring instrument PAL M COLOR 1 Receive a PAL M broadcast 2 Select the sub menu screen PICTURE from the SERVICE MENU 3 Select 3 COL PALM with the MENU 1 4 key and confirm its initial setting value 4 If the color is not the best with the initial set value make fine adjustment until you get t...

Page 20: ...nal 75 white 2 In the sub menu screen PICTURE select 4 COL PALN with the MENU 1 4 key and confirm its initial setting value 3 Connect the oscilloscope between TP 47B and TP E 4 Adjust 4 COL PALN to set the value A in the figure to 8V W B with the MENU 2 3 key NTSC COLOR 1 Receive a NTSC full field color bar signal 75 white 2 In the sub menu screen PICTURE select 5 COL NTSC with the MENU 1 4 key an...

Page 21: ...Cy Y W G B Measuring Item Test point Adjustment part instrument Setting Remote TINT of control unit COLOR VIDEO PICTURE STATUS BRIGHT DETAIL G DRIVE B DRIVE R CUT G CUT B CUT Description NOTE Do not adjust Each value should be set to the initial value 1 Select the sub menu screen VIDEO STATUS CINEMA from the SERVICE MENU 2 Select TINT B CUT with the MENU 1 4 key and reset each value to the initial...

Page 22: ...rom the X connector 6 Plug the AC power cord and make sure that the picture ap pears normally X Ray Protector Operation Normally the voltage at point A does not exceed the Zener volt age of D562 The voltage at point A will be determined by divid ing the voltage from HVT FBT by R562 and R563 When you connect a resistor of 15 0kΩ or less in parallel with R562 the voltage at point A is increased D562...

Page 23: ...a green raster signal from the signal generator and turn the screen to green raster 5 Move the deflection yoke backward 6 Bring the long lug of the purity magnets on the short lug and position them horizontally Fig 2 7 Adjust the gap between two lugs so that the green raster will come into the center of the screen Fig 3 8 Move the deflection yoke forward and fix the position of the deflection yoke...

Page 24: ...ta red blue 3 Using 6 pole convergence magnets overlap the magenta red blue and green lines in the center of the screen to turn them to white 4 Repeat 2 and 3 above and make best convergence DYNAMIC CONVERGENCE ADJUSTMENT 1 Move the deflection yoke up and down and overlap the lines in the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periphery Fig 3 3 Repeat...

Page 25: ...ver current for speaker drive is detected Operation of CRT NECK protec tion circuit Operation of X ray protection cir cuit Method of detection The microcomputer detects the possible abnormality at 1 sec intervals If NG state is detected for more than 1 ms the microcomputer judges that there is an abnormal ity DITTO DITTO State of abnormality When an abnormality has been detected the SUB POWER is t...

Page 26: ...AV 14F1P No 56084 26 ...

Page 27: ...AV 14F1P No 56084 36 CTH 0009 CRT AV14F1PPH SK 3 VICTOR COMPANY OF JAPAN LIMITED TELEVISION RECEIVER DIVISION 1106 Heta Iwai city Ibaraki prefecture 306 0698 Japan ...

Search results

Summary of Contents for AV-14F1P(PH)

Reviews:

Related manuals for AV-14F1P(PH)

Brands by name

Popular brands

JVC AV-14F1P(PH), Service Manual

Search results

Summary of Contents for AV-14F1P(PH)

Reviews:

Related manuals for AV-14F1P(PH)

Brands by name

Popular brands