Panasonic TX-21AV1C Manual de usuario

TABLE OF CONTENTS

SAFETY INSTRUCTION ....................................................................................................... 2

SPECIFICATION................................................................................................................... 3

CIRCUIT BLOCK DIAGRAM................................................................................................. 4

ALIGNMENT INSTRUCTIONS .............................................................................................. 5

SERVICE REMOCON DIAGRAM .......................................................................................... 8

SCHEMATIC DIAGRAM........................................................................................................ 11

EXPLODED VIEW................................................................................................................. 13

PRINTED CIRCUIT BOARD.................................................................................................. 18

SERVICE PARTS LIST ......................................................................................................... 20

Different parts list for inch...................................................................................................................................37

The different parts list for system & tuner ............................................................................................................39

The different parts list for crt...............................................................................................................................50

The different parts list for deck............................................................................................................................51

The different parts list for remote control.............................................................................................................52

SAFETY INSTRUCTION

CAUTION

WARNING :BEFORE SERVICINGTHIS CHASSIS,READ

THE“X-RAY RADIATION PRECAUTION”,“ SAFETY

PRECAUTION”AND“PRODUCTION SAFETY NOTICE”

BELOW.

X-RAY RADIATION PRECAUTION

1. Excessive high voltage can produce potentially hazard

ous X-RAY RADIATION.To avoid such hazards,

the high voltage must not exceed the specified limit

The nominal value of the highvoltage of this receiver is

23-25KV(14”),25-28KV(20”),25~29KV(21”) at max.

beam current, The high voltage must not,under any circ-

umstances, exceed 26KV(14”),30KV(20”),31KV(21”).

Each time a receiver requires servicing,the high voltage

should be checked.

It is recommended the reading of the high voltage be

recorded as a part of the service records, It is important

to use an accurate and reliable high voltage meter.

2. The only source of X-RAY radiation in this TV receiver

is the picture tube. For continuous X-RAY RADIATION

protection, the replacemnt tube must be exactly the

same type tube as specified in the parts list.

SAFETY PRECAUTION

1. Potentials of high voltage are present when this

receiver is operating. Operation of the receiver outside

the cabinet or with the back board removed involves a

shock hazard from the receiver.

1) Servicing should not be attempted by anyone who is

not thoroughly familiar with the precautions necesary

when working on high voltage equipment.

2) Always discharge the picture tube before handling the

tube.The picture tube is highly evacuated and if

briken, glass fragments will be violently expelled.

2. If any fuse in this TV receiveris blown, replace it with

the FUSE specified in the Replacement Parts list.

3.When replacing a high wattage resistor ( metal oxide

film resistor ) in circuit board, keep the resistor 10mm

away from circuit board.

4. Keep wires away from high voltage or high temperature

components.

5.This receiver must operate under AC260 volts, 50Hz.

NEVER connect to DC supply or any other power or

frequency.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this have special

safety-related characteristics.

These characteristics are often passed unnoticed by a

visual inspection and the X-RAY RADIATION protection

afforded by them cannot necessarily be obtained by using

replacement components rated for higher voltage, watt-

age,etc. Replacement parts which have these special

safety characteristics are identified in this manual and its

supplements, electrical components having such features

are identified by designated symbol on the parts list.

Before replacing any of these components,read the parts

list in this manual carefully.

The use of substitute replacement parts which do not have

the same safety characteristics as specified in the parts

list may create X-RAY Radiation.

GB14H3/14H4/20H3/20H4/21H4T1/T2

MODEL 14H3/14H4/20H3/20H4/21H4T1/T2 REMARK

ITEMS F14H3/14H4/20H3/20H4/21H4T1/T2

K14H3/14H4/20H3/20H4/21H4T1/T2

TV STANDARD PAL-I/II(GB MODEL),PAL-B/G(BLANK MODEL),PAL-B/G,SECAM-L/L(F MODEL)

SECTION PAL/SECAM-B/G,DK(K MODEL)

SCREEN SIZE 14”:A34JLL90X01, A34AGT 14X71, A33EKC01X01, A34EAC01X06

20”:A48JLL90X02, A48LPE01X01, A48EAX33X081

21”:A51EAL155X17, A51EFS83X181, A51EBV13X09

MAIN VOLTAGE 220~240V AC,50Hz

POWER STAND BY MODE : BELOW 5 Watts

CONSUMPTION OPERATION MODE : 14”=59Watts, 20”=65Watts, 21”=69Watts

SOUND OUTPUT 1Wmin(14”), 1.5Wmin(20”), 1.5Wmin(21”)

SPEAKER 3Watts 8 Ohm

ANTENNA IMPEDANCE 75 Ohm unbalanced input

TUNING SYSTEM FVS(FREQUENCY SYNTHESIS) TUNING

TUNER VHF-L : E2-S7,

VHF-H : S8-S36,

UHF : S37-E69 (PAL-1=UHF ONLY)

NUMBER OF PROGRAM 100 PROGRAM

AUX, TERMINAL SCART JACK(REAR) , RCA JACK(AV2 FRONT), HEADPHONE JACK

REMOTE CONTROLLER R-46C with “AAA” type batteries

OTHER FEATURE ON SCREEN DISPLAY, SLEEP TIMER, WAKE UP TIMER

FULL AUTO SEARCH, MANUAL/FINE TUNING

CHILD LOCK, PANEL LOCK, AUTO REPEAT,

PICTURE TYPE SELECTION (NORMAL 1/2, FAVOURITE),

INDEX SEARCH, TV/AV

VIDEO SINGLE SYSTEM PAL/SECAM colour and CCIR mono chrome signals, 625lines/50fidlds.

SECTION RECORDING SYSTEM 2 HEAD / 4 HEAD

INPUT 1Vp-p, 75 ohm, unbalanced

OUTPUT 1Vp-p, 75 ohm, unbalanced

SIGNAL TO NOISE RATIO 45dB with NETTETE IMAGE control at center position

HORIZONTAL RESOLUTION 240lines with NETTETE IMAGE control at center position

AUDIO RECORDING SYSTEM LONGITUDINAL TRACK

INPUT -3.8dBm(500mVrms), more than 47 Kohms, unbalanced

OUTPUT -3.8dBm(500m Vrms). less than 1 Kohms, unbalanced

FREQUENCY RANGE 100Hz to 8KHz

SIGNAL TO NOISE RATIO 40dB(more than)

GENERA TEMPERATRE 5

C to 35

C(operating)

-20

C to 60

C (storage temperature)

FORMAT standard

TAPE WIDTH 12.65mm

TAPE SPEED SP : 23.39mm/sec, LP : 11.70mm/sec

WITH FULLSIZE SP : 240 min, win E-240 video cassette

CASSETTE LP : 480min, win E-240 video cassette

SPECIFICATION

CAUTION

CIRCUIT BLOCK DIAGRAM

ALIGNMENT INSTRUCTIONS

1. MAINTUNER AGC

1) Set a Pattern Generator with RF level 62 2 dBuV, 210.25 MHz.

2) Connect a OSCILLOSCOPE PROBE to P101 (pin #1) ,(TUNER AGC INPUT).

3) Adjust AGC UP/DOWN KEY the voltage drop about 1V DC over below it’s maximum voltage.

2. SUBTUNER AGC

1) Set a pattern Generator with RF level 62 2dBuV, 210.25 MHz

2) Connect a OSCILLOSCOPE PROBE to P101(pin #3)

3) Press the REC-B key two times.

4) Ajust R157 on the MAIN PCB the voltage drop about 1V DC over below it’s maximum voltage.

3. SCREEN

1) Apply a COLOR BAR PATTERN SIGNAL.

2) Press the “SCREEN” KEY.

3) Connect a OSCILLOSCOPE PROBE to P901 ( CRT CATHODE R,G,B )

4) Adjust the screen volume on FBT such that the highest black level voltage 120V 5Vdc.

*Another methode

1) Press “AV Key” in condition of AV no signal.

2) Press the “SCREEN” KEY.

3) Connect a OSCILLOSCOPE PROBE to P901 ( CRT CATHODE R,G,B )

4) Adjust the screen volume on FBT such that the highest black level voltage 140V 5Vdc.

4.WHITE BALANCE

1) Apply a COLOR BAR PATTERN SIGNAL.

2) Adjust the R,G,B UP/DOWN KEY of the other color which did not appear on the screen to obtain WHITE.

5. FOCUS

1) Apply a RETMA PATTERN SIGNAL.

2) Adjust the FOCUS VOLUME on FBT to obtain optimal resolution.

6. GEOMETRY

6-1. S-CORRECTION

1) Apply a CROSSHATCH PATTERN SIGNAL.

2) Adjust the S-CORR UP/DOWN KEY obtain the same distance between horizontal lines.

6-2.VERTICAL SLOPE

1) Apply a RETMA PATTERN SIGNAL.

2) Pressing the V-SLOPE +/- KEY, the lower half of the screen is blanked.

3) Adjust the border line of blanked picture coincident with the center marks of the patte

using the V-SLOPE +/- KEY.

6-3.VERTICAL CENTER

1) Apply a RETMA PATTERN SIGNAL.

2) Adjust the center line of pattern coincident with the mechanical center marks of the

CRT using the V-CENTER +/- KEY.

6-4.VERTICAL SIZE

*The V-CENTER adjustment has to be done in advance.

1) Apply a RETMA PATTERN SIGNAL.

2) Adjust the upperside of the pattern coincident with the mechanical center marks of

the CRT using the V-SIZE +/- KEY.

ALIGNMENT INSTRUCTIONS

6-5. HORIZONTAL CENTER

1) Apply a RETMA PATTERN SINGNAL.

2) Adjust picture centering with H-CENTER +/- KEY.

7. DECK ADJUSTMENT

7-1. X-POSITION AND P2,P3 ADJUSTMENT

1) Adjust point : X-POSITION

Checking point : oscilloscope ch1 = H/SW (PY03 #2)

oscilloscope ch2 = PB ENVE (PY03 #4)

Triggering : CH1

Measuring Equipment : oscilloscope, path jig

Mode : PLAYBACK, ATK OFF

Test tape : DP-2 (6KHz)

* Adjustment Procedure

1) Connect the PATH JIG to PY03 after Test tape PLAYBACK

2) Insert the DP-2 TAPE. ( Auto playback )

3) Pressing the “ATK OFF” KEY.

4) Adjust the waveform of PB ENVE to maximum(figure1) using X-position VR.

5) Adjust IN/OUTPUT GUIDE until the exact waveform appear as bellow figure2.

7-2. AUTO PG ADJUSTMENT

1) After adjustment of 7-1. Press the “REC.” button.

2) Eject the Test tape.

7-3. AZIMUTH ADJUSTMENT

1) Adjust point : AZIMUTH SCREW

Checking point : SOUND OUTPUT (P601)

Measuring Equipment : oscilloscope or audio level meter.

Mode : PLAYBACK

Test tape : DP-2 (6KHz)

* Adjustment Procedure

1) Connect the measuring equipment to the AUDIO OUTPUT (P601) terminal.

2) After test tape playback, adjust the output level maximally by varing the azimuth screw.

3) Fix the azimuth screw with locking paint.

*If EEPROM (I702) has been changed :

- Option data has to be changed and

- all alignment function has to be readjusted.

ALIGNMENT INSTRUCTIONS

SERVICE REMOCON

1.DIAGRAM

*To enter the“SERVICE MODE”

Press NORMAL => AV => SLEEP => CLEAR => POWER buttons in regular

sequency within 10seconds using USER REMOCON after setting ST-BY.

SERVICE REMOCON

2. HOW TO CHECK TV SECTION WITHOUT VCR DECK

If you want to check TV section without DECK mechanism, then please perform in this order.

1)Pull out the power cord.

2)Remove the VCR DECK mechanism.

3) Supply the main power. ( Main sw on )

4) Wait for about 10 seconds. (You can see the light of power LED if the TV is normal.)

5) Turn on the TV using the remocon. (You can see the OSD "EMERGENCY" )

6) Check the TV section.

3.Refer to general adjustment

1) S-CORR +/- ( S-CORRECTION )

Press this button to adjust the same distance between horizontal lines on screen of crosshatch pattern.

2) V-SLOPE +/- ( VERTICAL SLOPE )

Press this button to adjust the border line of blanked picture coincident with the center marks of the pattern.

3) V-CENT +/- ( VERTICAL CENTER )

Press this button to adjust the center line of the pattern coincident with the mechanical center marks of the CRT on

screen of RETMA pattern.

4) V-SIZE +/- (VERTICAL SIZE )

Press this button to adjust the upperside of the pattern coincident with the mechanical center marks the CRT on

screen of RETMA pattern.

5) H-CENT +/- ( HORIZONTAL CENTER )

Press this button to adjust picture centering with H-center on screen of RETMA pattern.

6) R,G,B +/- ( WHITE BALANCE )

The screen is become WHITE adjust R,G,B level by this button.

7) ATK OFF ( Auto tracking off )

Press this button to adjust X-Position adjustment.

Front panel's LED's are lighted up if you press this button.

Press the PB button.

ATK OFF : (RED, RED)

ATK MIN : (BLINK, OFF)

ATK MAX : (OFF, BLINK)

ATK ON : (BLINK,BLINK)

; LEFT LED = ST-BY, RIGHT LED = REC/T.REC

8) REC

Press this button to adjust AUTO PG.

9) SCREEN

Press this button to adjust the screen volume on FBT.

10) SHIP ( SHIPPING CONDITIONS )

Press this button to set the SHIPPING CONDITIONS.

11) REC-B (Only 2-TUNER Model)

Press this button to adjust SUB TUNER AGC.

Press once : picture is displayed colour pattern.

Press once more : picture is displayed black/white pattern.

12) AGC +/-

Press this button to adjust MAINTUNER AGC.

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