JVC AV-21SX1 EK Service Manual

4 (1)

JVC AV-21SX1 EK

General Information

Also Covers

AV-21TS1 EK

Matrix

Item

See Model

Book

 

 

 

E2prom Replacement

.............................................................................. AV-25TS1EK

5

 

Specifications

 

Item

 

Content

Dimensions (W x H x D)

............................................................ 60.5cm x 47.6cm x 47.5cm

Mass .....................................................................................................

23.7kg AV-21 SX1 EK

............................................................................................................

.21.3 Kg AV-21TS1 EK

TV RF System ............................................................................................................

 

CCIR (I)

Colour System ..................................................................

PAL / NTSC (only in EXT mode)

Stereo System .......................................................................................................

 

NICAM 6.0

Teletext system .............

FASTEXT (United Kingdom system) / WST (Standard System)

Receiving Channels and Freq.

 

UHF: E21 ~ E69 .........................................................................................

 

470MHz - 862MHz

Intermediate Frequency

 

 

VIF Carrier ...............................................................................................................

 

39.5MHz

SIF Carrier ................................................................................................

 

33.5MHz (6 0MHz)

Colour Sub Carrier Frequency

 

PAL ............................................................................................................................

 

4.43MHz

NTSC ........................................................................................................

 

3.58MHz / 4.43MHz

Aerial Input Terminal ..................................................................

75Unbalanced, Coaxial

Power Input ..........................................................................................

220 - 240V AC, 50Hz

Power Consumption ............................................

80W(Avg.) / 137W (Max.) AV-21SX1 EK

................................................................................

74W (Avg.) / 114W (Max.) AV-21TS1 EK

Picture Tube ............................................

21”( Visible size: 51cm), Diagonally measured

High Voltage ...........................................................

26.5kV ± 1.5kV (at zero beam current)

Speaker ........................................................

(10cm + 2cm) x 2, Round Type AV-21SX1 EK

..........................................................................

5cm x 9cm x 2cm Oval Type AV-21TS1 EK

Audio Output ........................................................................................................

 

10W + 10W

EXT Input I Output ......................

EXT - 1 I EXT - 2: 21 - pin Euroconnector (SCART socket)

Audio Output ....................................................

Variable (0 ~ 1,000 Vrms) Low impedance

..........................................................................................................

Centre .... RCA pin jack

.............................................................................................

Front L, R ....

RCA pin jack x 2

.............................................................................

Surround L,R (Rear) ....

RCA pin jack X2

Headphone Jack .......................................................................

Stereo mini jack (ø 3.5mm)

Remote Control Unit ....................

RM C770 [Battery size; AAA (R03) x 2] AV-21SX1 EK

.........................................................

RM C760 [Battery size; AAA (R03) x 2] AV-21TS1 EK

 

 

 

Service Adjustments

BEFORE STARTING SERVICE ADJUSTMENT

1.There are 2 ways of adjusting this TV: One is with the REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components.

2.The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition

can be different from the initial setting values. 3.Turn on the power of the TV and measuring

instrument for warming up for at least 30 minutes before starting adjustment.

4.Make sure that connection is correctly made to AC power source.

5.If the receive or input signal is not specified, use the most appropriate signal for adjustment.

6.Never touch parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service adjustment.

1

7.Preparation for adjustment (presetting): Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT:

MEASURING INSTRUMENT AND FIXTURES

1.DC voltmeter (or digital voltmeter)

2.Oscilloscope

3.Signal generator (Pattern genetator) [PAL / NTSC]

4.Remote control unit

(1)

SPATIAL EFFECT

OFF

(2)

BASS

CENTRE

 

TREBLE

CENTRE

 

BALANCE

CENTRE

(3)

CINEMA / GAME

STANDARD

(4)

ECO

OFF

(5)16:9(ASPECT SIZE) 4:3

ADJUSTMENT ITEMS

Adjustment item

Adjustment item

B1 VOLTAGE check

VSM PRESET setting

 

VIDEO/CHROMA circuit adjustment

FOCUS adjustment

DEFLECTION circuit adjustment

IF circuit adjustment

AUDIO circuit (Do not adlust.)

ADJUSTMENT LOCATIONS

BASIC OPERATION OF 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 (adjustment) can be made, and they are broadly classified in the following items of settings (adjustments):

1) 1. IF

For entering/adjusting the setting values (adjustment values) of the IF circuit.

2)2. V/C

For entering/adjusting the setting values (adjustment values) of the VIDEO/CHROMA circuit.

3)3. AUDIO

For entering/adjusting the setting values (adjustment values) of the multiplicity SOUND circuit.

4)4. DEF

For entering/adjusting the setting values (adjustment values) of the DEFLECTION circuit.

5)5. VSM PRESET

For setting the values of STANDARD, USER, CINEMA and GAME.

(VSM : video status memory)

3. BASIC OPERATION OF SERVICE MENU

1) How to enter SERVICE MENU

Press the DISPLAY key and the CINEMA/ GAME key of the REMOTE CONTROL UNIT simultaneously. The SERVICE MENU screen of Fig.1 will be displayed.

SERVICE MENU

1. IF

2.

V/C

3. AUDIO

4.

DEF

5. VSM PRESET

 

1-5: SELECT

 

: EXIT

 

 

 

Fig. 1

2) Selection of SUB MENU SCREEN

1) Press one of the keys 1 ~ 5 of the REMOTE CONTROL UNIT, and select the SUB MENU SCREEN (See Fig. 2) from the SERVICE MENU.

SERVICE MENU SUB MENU

1.IF

2.V/C

3.AUDIO

4.DEF.

5.VSM PRESET

3) Method of Setting

1) Method of Setting 1. IF

[1. VCO]

(1)1 Key.....Select 1.IF. (2)1 Key.....Select 1.VCO.

(3)The VCO (OW) screen will be displayed in yellow when the AFC voltage is at a certain level and in blue when it is at other levels.

(4)DISPLAY Key. As you press this twice, you will return to the SERVICE MENU.

[2. DELAY POINT] (1)1 Key.....Select 1.IF.

(2)2 Key.....Select 2.DELAY POINT. (3)FUNCTION -1+ Key Set (adjust) the setting

values of the setting items. (4)VIDEO/SOUND Key..... Memorize the set

value. (Before storing the setting values in memory, do not press the CH, TV /EXT, DISPLAY, POWER ON/OFF keys - if you do, the values will not be stored in memory.)

(5)DISPLAY Key.....When this is pressed twice, you will return to the SERVICE MENU.

2) Method of setting 2.V/C, 3.AUDIO, 4.DEF and 5.VSM PRESET

(1)2~5 Keys .....Select one from 2. V/C, 3. AUDIO, 4. DEF and 5. VSM PRESET.

(2)FUNCTION UP/DOWN Key Select setting items.

(3)FUNCTION - / + Key......Set (adjust) the setting values of the setting items. (When 1 CUTOFF of 2.V/C is selected, press its -‘ or “+“ function key, and the whole screen will change to a faint horizontal line appearing in its center. Press the same or +‘ key again, and the screen will return to the original 1 CUTOFF screen.)

(4)VIDEO/SOUND KeyMemorize the setting value. (Before storing the setting values in memory, do not press the CH, TV / EXT, DISPLAY, POWER ON / OFF keys - if you do, the values will not be stored in memory.)

(5)DISPLAY Key ..... Return to the SERVICE MENU screen.

4) Release of SERVICE MENU

1) After completings the setting, return to the SERVICE MENU, then again press the DISPLAY key.

B1 VOLTAGE CHECK

Item

Measuring

Test point

Adjustment part

Description

 

instrument

 

 

 

 

 

 

 

 

 

 

Check of B1

Signal

TP-91 (B1)

 

1.

Receive a whole black signal.

Voltage

generator

TP-E

 

2.

Connect a DC voltmeter to TP-91 and TP-E(4-).

 

DC Voltmeter

X CONNECTOR

 

3 Make sure that the voltage is DC1 17 ± 2.0V.

 

 

(MAIN PWB)

 

 

 

 

 

 

 

 

 

FOCUS ADJUSTMENT

Item

Measuring

Test point

Adjustment part

Description

 

instrument

 

 

 

 

Adjustment

Signal

-

FOCUS VR

1.

Receive a cross-hatch signal.

of FOCUS

generator

-

[In HVT]

2.

While watching the screen, adjust the FOCUS VR to

 

 

 

 

make the vertical and horizontal lines as tine and sharp

 

 

 

 

as possible.

 

 

 

 

3.

Make sure that when the screen is darkened, the lines

 

 

 

 

remain in good focus.

 

 

 

 

 

 

IF CIRCUIT ADJUSTMENT

 

Item

 

Measuring

Test point

 

Adjustment part

Description

 

 

 

instrument

 

 

 

 

 

 

 

 

 

Adjustment

 

Remote

 

 

 

T010 TRANSF.

Do not make any adiustment unless the adjustment is

 

of VCO

 

control unit

 

 

 

 

 

out of way and you cannot get correct PICTURE.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCO (CW)***.**MHZ

<

--------------fv

1.

Select l.IF from the SERVICE MENU.

 

 

 

TOO HIGH

 

 

 

 

 

2.

Press 1 key and select 1 .VCO.

 

 

 

ABOVE REFERENCE

 

 

 

 

3.

Select a receivable broadcast channel with the

 

 

 

BELOW REFERENCE

 

<

---------YELLOW

CHANNEL key.

 

 

 

TOO LOW

 

 

 

 

 

4. Turn the core of T010 TRANSE. until the colour of the

 

 

 

 

 

 

 

 

 

characters TOO HIGH displayed on the screen changes

 

 

 

 

: EXIT

 

 

 

 

from blue to yellow. (Step 1)

 

 

 

 

 

 

 

 

 

5.Then slowly turn the core of T0l 0 TRANSE. to the left

 

 

 

 

 

 

 

 

 

until the colour of the characters BELOW REFERENCE

 

 

 

 

 

 

 

 

 

changes from blue to yellow. (Step 3)

 

 

 

 

 

 

 

 

 

6.

Press the Display key three times to return to normal

 

 

 

 

 

 

 

 

 

screen.

 

 

 

 

 

 

 

 

 

7.

Perform CHANNEL PRESET again, and make sure

 

 

 

 

 

 

 

 

 

that each broadcast is being received properly

 

 

 

 

 

 

 

 

 

 

 

 

 

Screen display

 

 

 

Step

 

 

 

 

 

 

 

 

1

 

 

2

3

 

 

 

TOO HIGH

 

Yellow

 

Blue

Blue

 

 

 

ABOVE REFERENCE

Blue

 

Yellow

Blue

 

 

 

BELOW REFERENCE

Blue

 

Blue

Yellow

 

 

 

TOO LOW

 

Blue

 

 

Blue

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adjustment

 

Remote

 

 

DELAY POINT

 

 

1.

Receive a black and white signal (colour off).

 

of

 

control unit

 

(AGC TAKE-OVER)

 

 

2.

Select 1.IF from the SERVICE MENU.

 

DELAY

 

 

 

 

 

 

 

 

 

3.

Select 2.DELAY POINT by pressing the 2 key on the

 

POINT

 

 

 

 

 

 

 

 

 

remote control.

 

(AGC)

 

 

 

 

 

 

 

 

 

4. Adjust the FUNCTION -/+ key until video noise

 

 

 

 

 

 

 

 

 

 

 

disappears.

 

 

 

 

 

 

 

 

 

 

 

5. Press the VIDEO/SOUND key and memorize the set value.

 

 

 

 

 

 

 

 

 

 

 

6. Turn to other channels and make sure that there are

 

 

 

 

 

 

 

 

 

 

 

not irregularities.

 

Setting

Variable

 

 

Initial setting

 

 

 

 

 

 

(adjustment)

range

 

 

value

 

 

 

 

 

 

item

 

 

 

 

 

 

 

 

 

 

 

DELAY POINT

0~63

 

 

4

 

 

 

 

 

 

 

(AGC TAKE-OVER)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VSM PRESET SETTING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

 

Measuring

 

Test point

Adjustment part

Description

 

 

 

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Setting of

 

Remote

 

 

1.

BRIGHT

 

 

1.

Select 5.VSM PRESET from the SERVICE MENU.

 

VSM

 

control unit

 

2.

CONT.

 

 

2.

Select STANDARD with the CINEMA/GAME key.

 

PRESET

 

 

 

 

3.

COLOUR

 

 

3. Adjust the FUNCTION UP/DOWN and FUNCTION -/+

 

 

 

 

 

 

4.

SHARP

 

 

key to bring the set values of 1. BRIGHT ~10 TREBLE to

 

 

 

 

 

 

5. TINT

 

 

the values shown in the table.

 

 

 

 

 

 

6.

R DRIVE

 

 

4.

Press the VIDEO/SOUND key and memorize the set

 

 

 

 

 

 

7.

G DRIVE

 

 

value.

 

 

 

 

 

 

8.

B DRIVE

 

 

5.

Respectively select the VSM PRESET mode for USER,

 

 

 

 

 

 

9.

BASS

 

 

CINEMA and GAME, and make similar adjustment as in 3

 

 

 

 

 

 

10. TREBLE

 

 

and 4 above.

 

 

 

 

 

 

 

 

 

 

 

 

 

Specifications / Service Adjustments / Adjustments Cont’d (1) / Adjustments Cont’d (2) / AV Selector PCB / Safety Parts

Front Control Diagram / CRT Diagram / Main Diagram 1 / Main Diagram 2

JVC AV-21SX1 EK

2

Service Adjustments Cont’d

VSM preset mode

 

STANDARD

USER

CINEMA

GAME

Setting item

 

 

 

 

 

 

 

 

 

 

 

 

1.

BRIGHT

SETTING VALUE

0

0

+1

+ 2

2.

CONT.

SETTING VALUE

+10

+10

+3

+ 2

3. COLOUR

SETTING VALUE

0

0

-2

0

4.

SHARP

SETTING VALUE

0

0

-2

-2

5. TINT

SETTING VALUE

0

0

0

0

6.

R. DRIVE

SETTING VALUE

0

0

0

0

7.

G. DRIVE

SETTING VALUE

0

0

-2

0

8.

B. DRIVE

SETTING VALUE

0

0

-5

0

9.

BASS

SETTING VALUE

+4 (TS1)

+4 (TS1)

+8 (TS1)

+6 (TS1)

 

 

 

0 (SX1)

0 (SX1)

+6 (SX1)

+4 (SX1)

10. TREBLE

SETTING VALUE

+4 (TS1)

+4 (TS1)

+6 (TS1)

+2 (TS1)

 

 

 

0 (SX4)

0 (SX1)

+2 (SX1)

0 (SX1)

 

 

 

 

 

 

 

SETTING VALUES OF VSM PRESET

VIDEO/CHROMA CIRCUIT ADJUSTMENT

The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.

* Items in parentheses ( ) are automatically set to below table.

Setting

Variable

 

 

 

Initial

 

 

 

 

 

 

 

(adjustment)

range

 

 

 

setting

 

 

 

 

 

 

 

item

 

 

 

 

value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. CUTOFF

ON / OFF

 

 

 

OFF

 

 

 

 

 

 

 

2. R DRIVE

-31~ +32

 

 

+12

 

 

 

 

 

 

 

3. G DRIVE

-31~ +32

 

 

+2

 

 

 

 

 

 

 

4. B DRIVE

-31~ +32

 

 

0

 

 

 

 

 

 

 

(Do not adjust)

 

 

 

 

(Fixed)

 

 

 

 

 

 

 

5. BRIGHT

-31~ +32

 

 

+6

 

 

 

 

 

 

 

6. CONT.

-41~ +22

 

 

-10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Setting

Colour system

 

Variable

PAL

NTSC

NTSC

 

(adjustment)

 

 

 

 

range

 

 

 

3.58

4.43

 

item

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7. COLOUR

TV

 

 

 

+3

 

-

-

 

initial

 

 

 

 

-31~ +32

 

 

 

 

 

 

 

setting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

value

Comp. VIDEO

 

 

 

+3

 

+12

(+12)(SX1)

 

 

 

 

 

 

 

 

 

 

 

 

(0) (TS1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.TINT

 

 

 

 

 

 

 

 

 

 

 

 

initial

Comp. VIDEO

 

-31~ +32

 

-

 

 

-2

(-2)(SX1)

 

setting

 

 

 

 

 

 

 

 

 

 

(0) (TS1)

 

value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9.SHARP

TV

 

-31~ +32

 

0

 

 

0

(0)

 

 

 

 

 

 

(21TS 1 EK)

 

 

 

 

 

 

 

 

 

 

 

-8 ~ +7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Comp. VIDEO

 

(21SX1 EK)

0

 

 

0

(0)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

Measuring

 

Adjustment part

 

 

Description

 

 

 

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adjustment

Signal

 

R. CUT OFF VR

 

 

1. Receive a black and white signal (colour off).

of WHITE

generator

 

 

 

 

 

 

2. Select 2.V/C trom the SERVICE MENU.

BALANCE

 

 

 

G. CUT OFF VR

 

 

3. Select iCUT OFF with the FUNCTION UP/DOWN key.

(Low light)

Remote

 

 

 

 

 

 

4. Show one horizontal line with the FUNCTION -/+ key. With

 

control unit

 

B. CUT OFF VR

 

 

the SCREEN VR, adjust so that the horizontal line will not be too bright.

 

 

 

 

SCREEN VR

 

 

5.Turn the CUT OFF VR respectively for R, 0 and B fully to the

 

 

 

 

[ In HVT]

 

 

left (to the left direction when seen trom the rear).

 

 

 

 

 

 

 

 

 

6.Gradually turn the SCREEN VR from the left end to the right

 

 

 

 

 

 

 

 

 

direction to bring one of the red, green and blue colours faintly visible.

 

 

 

 

 

 

 

 

 

7. By adjusting the CUT OFF VR, bring out the other 2 colours and make

 

 

 

 

 

 

 

 

 

one horizontal line visible in white

 

 

 

 

 

 

 

 

 

8.Turn the SCREEN VR and bring one white horizontal line faintly visible.

 

 

 

 

 

 

 

 

 

9. With the -/ + key, turn off 1 CUTOFF screen.

Adjustment

Signal

 

2. R. DRIVE

 

 

1. Receive a black and white signal (colour off).

of WHITE

generator

 

3.G. DRIVE

 

 

2. Select 2.V/C with the SERVICE MENU.

BALANCE

 

 

 

 

 

 

 

 

3. Select 2.R DRIVE and 3.G DRIVE with the FUNCTION UP/DOWN key.

(High light)

Remote

 

4.B. DRIVE

 

 

4. Change the screen colour to white with the FUNCTION -/+ key.

 

control unit

 

(Do not adjust)

 

 

5. Press the VIDEO/SOUND key, and memorize the respectively set values

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

Measuring

Adjustment part

 

Description

 

 

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adjustment

Remote

5. BRIGHT

 

1. Receive any broadcast.

of

control unit

 

 

 

 

 

 

 

 

 

 

2. Select 2.V/C from the SERVICE MENU.

SUB BRIGHT

 

 

 

 

 

 

 

 

 

 

 

 

3. Select 5.BRIGHT with the FUNCTION UP/DOWN key.

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

Set the initial setting value with the FUNCTION -/+ key.

 

 

 

 

 

 

 

 

 

 

 

 

 

5.

If the brightness is not the best with the initial set value, make fine

 

 

 

 

 

 

 

 

 

 

 

 

 

 

adjustment until you get the best brightness.

 

 

 

 

 

 

 

 

 

 

 

 

 

6.

Press the VIDEO/SOUND key and memorize the set value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adjustment

Remote

6. CONT.

 

1. Receive any broadcast.

of

control unit

 

 

 

 

 

 

 

 

 

 

2. Select 2.V/C with the SERVICE MENU.

SUB CONT.

 

 

 

 

 

 

 

 

 

 

 

 

3. Select 6.CONT. with the FUNCTION UP/DOWN key.

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

Set the initial setting value with the FUNCTION -/+ key.

 

 

 

 

 

 

 

 

 

 

 

 

 

5.

If the contrast is not the best with the initial set value, make fine

 

 

 

 

 

 

 

 

 

 

 

 

 

 

adjustment until you get the best contrast.

 

 

 

 

 

 

 

 

 

 

 

 

 

6.

Press the VIDEO/SOUND key and memorize the set value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adlustment

Remote

 

 

 

 

 

 

 

 

 

 

7. COLOUR [Method of adjustment without using measuring instrument]

of SUB

control unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COLOUR I

 

 

PAL COLOUR

 

(PAL COLOUR)

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Receive a PAL broadcast.

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

Select 2.V/C from the SERVICE MENU.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Select 7.COLOUR with the FUNCTION UP/DOWN key.

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

Set the initial selling value for PAL COLOUR with the FUNCTION -/+ key.

 

 

 

 

 

 

 

 

 

 

 

 

 

5.

If the colour is not the best with the initial set value, make fine

 

 

 

 

 

 

 

 

 

 

 

 

 

 

adjustment until you get the best colour.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6. Press the VIDEO/SOUND key and memorize the set value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NTSC COLOUR

 

(NTSC 3.58 COLOUR)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7. Input NTSC 3.58MHz COMPOSITE VIDEO signal from the EXT terminal.

 

 

 

 

 

 

 

 

 

 

 

 

 

8.

Make similar fine adjustment of NTSC3.58 COLOUR as previously.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(NTSC 4.43 COLOUR)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When NTSC 3.58 is set, NTSC 4.43 will be automatically

 

 

 

 

 

 

 

 

 

 

 

 

 

 

set at the same value as NTSC 3.58.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adjustment

Signal

TP-47B

 

7. COLOUR [Method of adjustment using measuring instrument]

of

generator

TP-E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUB

 

 

(CRT

 

PAL COLOUR (PAL COLOUR)

COLOUR II

Osciiioscope

SOCKET

 

1. Receive a PAL full field colour bar signal (75% white).

 

 

 

 

PWB)

 

2. Select 2.V/C from SERVICE MENU.

 

 

 

 

Remote

 

3. Select 7.COLOUR with the FUNCTION UP/DOWN key.

 

 

 

 

control unit

 

4. Set the initial setting value of PAL COLOUR with the FUNCTION -/ + key.

 

 

 

 

 

 

 

 

 

 

 

 

 

5.

Connect the oscilloscope to TP-47B.

 

 

 

 

 

 

 

 

 

 

 

 

 

6.

Adjust PAL COLOUR and bring the value of (A) in the illustration to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- 4V (W~B).

 

 

 

 

 

 

 

 

 

 

 

 

 

7.

Press the VIDEO/SOUND key and memorize the seting value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NTSC COLOUR

 

(NTSC 3.58 COLOUR)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. Input NTSC 3.58MHz COMPOSITE VIDEO signal (full field colour bar 75%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

white) from the EXT terminal.

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

Set the initial setting value of NTSC3.58 COLOUR with the FUNCTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-/+ key.

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Adjust NTSC3.58 COLOUR and bring the value of (A) of the illustration

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to 0V (W~B).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. Press the VIDEO/SOUND key and memorize the set value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(NTSC 4.43 COLOUR)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When NTSC 3.58 is set, NTSC 4.43 will be automatically

 

 

 

 

 

 

 

 

 

 

 

 

 

 

set at the same value as NTSC 3.58.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adjustment

Remote

8. TINT

 

[Method of adjustment without using measuring instrument]

of

control unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUB TINT I

 

 

NTSC TINT

 

(NTSC 3.58 TINT)

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Input COMPOSITE VIDEO signal of NTSC 3.58MHz from the EXT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

terminal.

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

Select 2.V/C from the SERVICE MENU.

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Select 8.TINT with the FUNCTION UP/DOWN key.

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

Set the initial setting value of NTSC 3.58 TINT with the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FUNCTION -/+ key.

 

 

 

 

 

 

 

 

 

 

 

 

 

5.

If you cannot get the best tint with the initial setting value, make fine

 

 

 

 

 

 

 

 

 

 

 

 

 

 

adjustment until you get the best tint.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6. Press the VIDEO/SOUND key and memorize the set value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(NTSC 4.43 TINT)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When NTSC 3.58 is set, NTSC 4.43 will be automatically

 

 

 

 

 

 

 

 

 

 

 

 

 

 

set at the same value as NTSC 3.58.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

Measuring

Test point

Adjustment

 

Description

 

instrument

 

part

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Adjustment

Signal

TP-47B

8. TINT

 

[Method of adjustment using measuring instrument]

of

generator

TP-E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SUB TINT II

 

 

(CRT

NTSC TINT

 

(NTSC 3.58 TINT)

 

Oscilloscope

SOCKET

 

 

 

 

 

 

 

1.

Input COMPOSITE VIDEO signal (full field colour bar

 

 

 

PWB)

 

 

 

 

 

 

 

 

75% white) of NTSC3.S8MHz from the EXT terminal.

 

Remote

 

 

 

 

 

 

 

 

2.

Select 2.V/C from the SERVICE MENU.

 

control unit

 

 

 

 

 

 

 

 

3.

Select 8.TINT with the FUNCTION UP/DOWN key.

 

 

 

 

 

 

 

 

 

 

 

4.

Set the initial setting value of NTSC 3.58 TINT with the

 

 

 

 

 

 

 

 

 

 

 

 

FUNCTION -/ + key.

 

 

 

 

 

 

 

 

 

 

 

5.

Connect the oscilloscope to TP-47B.

 

 

 

 

 

 

 

 

 

 

 

 

6. Adjust NTSC3.58 TINT to bring the value of (A) of the

 

 

 

 

 

 

 

 

 

 

 

 

illustration to OV(W~Mg).

 

 

 

 

 

 

 

 

 

 

 

7.

Press the VIDEO/SOUND key and memorize the setting value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(NTSC 4.43 TINT)

 

 

 

 

 

 

 

 

 

 

 

 

When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the

 

 

 

 

 

 

 

 

 

 

 

 

same value as NTSC 3.58.

 

 

 

 

 

 

 

 

 

 

 

 

Adjustment

Remote

 

9. SHARP

 

1. Receive any broadcast.

of SHARP

control unit

 

 

 

 

 

 

 

 

2.

Select 2. V/C from the SERVICE MENU.

 

 

 

 

 

 

 

 

 

 

 

3.

Select 9. SHARP with the FUNCTION UP DOWN key.

 

 

 

 

 

 

 

 

 

 

 

4.

Set the initial setting value with the function -/ + key.

 

 

 

 

 

 

 

 

 

 

 

5.

Press the VIDEO / SOUND key and memorize the

 

 

 

 

 

 

 

 

 

 

 

 

setting value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DEFLECTION CIRCUIT ADJUSTMENT

There are 2 modes of adjustment - (1) 50Hz 4: 3 and (2) 60Hz 4:3 depending upon the kind of signals (VERTICAL FREQUENCY 50Hz / 60Hz).

When adjusted in the (1) 50Hz 4:3 mode, the mode (2) will be linked to the mode (1) and will be automatically adjusted for the same value.

When adjusted in the mode (2), only this mode will be adjusted singly.

Setting

 

 

 

 

 

 

 

 

 

 

(adlustment)

Adjustment name

 

Variable

Initial setting value

 

item

 

 

 

 

 

range

50Hz

60Hz

 

 

 

 

 

 

 

 

 

 

 

 

4:3

4:3

 

1.

V-SLOPE

Vertical hight

 

 

 

-31~ + 32

-2 0

 

 

 

 

 

 

(Size of bottom side of screen)

 

 

 

 

 

 

2. V-SHIFT

Vertical center

 

 

 

-31~ + 32

+3 0

 

 

3.

V-SIZE

Vertical hight

 

 

 

-31~ + 32

+ 1

-1

 

4.

H-CENT

Horizontal center

 

-31~ + 32

-5

+ 10

 

 

 

 

 

 

 

 

 

 

 

 

-5

-1

 

8.

V-S.CR

Vertical hight correction

 

-31~ +32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Fixed)

(Fixed)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

 

Measuring

 

Adjustment part

 

Description

 

 

 

 

 

 

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

 

 

 

Signal

 

1. V-SLOPE

 

[(1) 50Hz 4:3]

 

 

Adjustment

 

generator

 

 

 

 

 

1. Receive a circle pattern signal of vertical frequency 50Hz. of

 

 

 

 

 

 

 

 

 

 

2. Select 4.DEF from the SERVICE MENU.

VERTICAL

 

Remote

 

 

 

 

 

3. Select 1 V-SLOPE with the FUNCTION UP/DOWN key.

SLOPE

 

control unit

 

 

 

 

 

4. Set the initial setting value of V-SLOPE (50Hz 4:3) with the FUNCTION -/+ key.

 

 

 

 

 

 

 

 

 

 

5. Adjust V-SLOPE and make the screen’s center line and the blanking line

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

coincide.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

 

 

 

 

 

2 V-SHIFT

 

6. Select 2.V-SHIFT and set the initial setting value.

Adjustment

 

 

 

 

 

 

 

7. Adjust V-SHIFT to make A =8.

of

 

 

 

 

 

 

 

 

 

8. Press the VIDEO/SOUND key and memorize the set value.

VERTICAL

 

 

 

 

 

 

 

 

 

 

 

SHIFT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

 

 

 

3. V-SIZE

 

 

 

 

 

9. Receive a cross-hatch signal.

Adjustment

 

 

 

 

 

 

 

10. Adjust 3.V-SIZE and set the initial setting value.

of

 

 

 

 

 

 

 

 

 

11. Adjust V-SIZE and make the vertical screen size 92% of the picture size.

VERTICAL

 

 

 

 

 

 

 

12. Press the VIDEO / SOUND key and memorize the set SIZE screen size

 

 

 

 

 

 

 

 

 

 

92V value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Specifications / Service Adjustments / Adjustments Cont’d (1) / Adjustments Cont’d (2) / AV Selector PCB / Safety Parts

Front Control Diagram / CRT Diagram / Main Diagram 1 / Main Diagram 2

JVC AV-21SX1 EK Service Manual

JVC AV-21SX1 EK

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service Adjustments Cont’d

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

Measuring

Adjustment part

Description

 

 

 

 

 

 

instrument

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.

 

 

4. H-CENT

13.Receive a circle pattern signal.

 

 

 

 

 

Adjustment

 

 

 

 

14.

Select 4.H-CENT and set the initial setting value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of

 

 

 

 

15. Adjust H-CENT to make C=D.

 

 

 

 

 

HORI.

 

 

 

 

16.Press the VIDEO/SOUND key and memorize the set value.

 

 

 

 

 

CENTRE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.

 

 

8. V-S. CR

No alignment, but adjust this mode if result of no alignment is

too bad.

 

 

 

 

Adjustment

 

 

 

 

17.

Receive a cross-hatch signal.

 

 

 

 

 

of V-S. CR

 

 

 

 

18.

Select 8.V-S. CR and set the initial setting values.

 

 

 

 

 

 

 

 

 

 

19. Adjust V-S. CR and make the gaps between the horizontal

lines same.

 

 

 

 

 

 

 

20.Press the VIDEO/SOUND key and memorize the set values.

 

 

 

 

 

 

 

21.

Make sure that the adjustment is properly done on the screen of (2) 60Hz 4:3.

 

 

 

 

 

 

 

 

 

 

 

 

CRT Diagram

 

AUDIO CIRCUIT

 

 

 

 

 

 

 

Do not touch 3.AUDIO (1. CONC LIMIT, 2. A2 ID THR) of the SERVICE MENU as it requires no adjustment.

3. AUDIO

 

 

Setting (adjustment) item

Variable

Initial setting

 

range

value (fixed)

1. CONG LIMIT (Do not adjust)

00H ~ FFH

0AH

2. A2 ID THR (Do not adjust)

00H ~ FFH

19H

Fig. 2 Service Menu Screen

 

 

 

Recommended Safety Parts

 

 

 

Recommended Safety Parts Cont’d

 

 

Item

Part No.

Description

 

 

 

 

Item

Part No.

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

A51EAL155X01

PICTURE TUBE(ITC)

V01 (Inc.DY.&Wed)

 

 

IC1902

TLP621(D4)-LF2

I.C.(PH.COUPLER)

 

2

CELD018-005J7

DEGAUSSING COIL

L01

 

 

CP1901

ICP-N38-Y

I.C.PROTECT

 

 

3

CM12774-A01-E

REAR COVER

 

 

 

 

CP1902

ICP-N75-Y

I.C.PROTECT

 

 

5

AEEMP003-185

POWER CORD

 

 

 

 

CP1903

ICP-N75-Y

I.C.PROTECT

 

 

11

CM22875-007-E

RATING LABEL (AV-21TS1 EK)

 

 

FR1406

QRH127J-1R5M

F R 1.5 Ω

1/2W

 

 

11

CM22875-008-E

RATING LABEL (AV-21SX1 EK)

 

 

FR1552

QRH027K-R82M

F R 0.82 Ω

2W

 

 

12

CE42545-001J1

H.V. TRANSF.

T1551

 

 

 

FR1553

QRH127J-6R8M

F R 6.8 Ω

1/2W

 

 

100

CM12772-00B-E

F.CABI ASSY (AV-21SX1 EK)

 

 

 

FR1554

QRZ0054-4R7M

F R 4.7 Ω

1/4W

 

 

100

CM12772-A0C-E

F.CABI ASSY (AV-21TS1 EK)

 

 

 

FR1555

QRH027J-lR8M

F R 1.8 Ω

2W

 

 

 

R1585

QRV141F-2201AY

MF R

2.2k Ω

1/4W

 

 

 

FR1556

QRH027J-2R2M

F R 2 2 Ω

2W

 

 

 

R1586

QRV141F-1402AY

MF R

14k Ω

1/4W

 

 

 

FR1958

QRH017K-R56M

F R (AV-21SX1 EK) 0.56 Ω 1W

 

 

R1991

QRZ0057-825

C R

8.2M Ω

1W

 

 

 

FR1958

QRH027J-IR5M

F R (AV-21TS1 EK)

 

 

C1522

QFZ0125-952N

MPP CAP. 9500 p F 2000V ±

2.5%

 

 

FR1961

QRZ0054-331M

F R 330 Ω

1/4W

 

 

 

C1524

QFZ0126-404N

MPP CAP. 0.4µ F 250V ± 2.5%

 

 

SK3001

CE42535-001J1

C.R.T. SOCKET

 

 

 

C1905

QCZ9034-472A

C CAP.

4700 p FAC400V

 

 

 

C8901

QFZ9040-474N

M F CAP. 0.47µ FAC275V

 

 

C1906

QCZ9034-472A

C CAP.

4700 P FAC400V

 

 

 

C8904

QFZ9040-473N

MM CAP. 0.047µ

FAC275V

 

 

C1907

QCZ9034-472A

C CAP.

4700 p FAC400V

 

 

 

F8901

QMF51D2-3R15J1

FUSE

3.15A

 

 

 

C1992

QCZ9041-471A

C CAP.

470 p FAC400V

 

 

 

LF8901

AEELF002-001

LINE FILTER

 

 

 

C1993

QCZ9041-332A

C CAP.

3300 p FAC400V

 

 

 

S8901

QSP4K21-C01

PUSH SWITCH

MAIN POWER

 

 

T1551

CE42545-001J1

H.V.TRANSF.

 

 

 

 

TH8901

CEKP010-001J2

W.P. THERMISTOR

 

 

T1901

CET5043-002J4

SW REACTOR (AV-21TS1 EK)

 

 

CP0601

ICP-N10-Y

I.C.PROTECT

 

 

 

T1901

CETS057-002J4

SW REACTOR (AV-21SX1 EK)

 

 

R0403

QRZ0054-470M

F R 47 Ω

1/4W

 

 

 

L1551

CELC901-064J6

HEATER CHOKE

 

 

 

 

R0504

QRZ0054-330M

F R 33 Ω

1/4W

 

 

 

D1901

D3SBA60

DIODE BRIDGE

 

 

 

 

R0509

QRZ0054-470M

F R 47 Ω

1/4W

 

 

 

Q1521

BU2506DX

POWER TRANSISTOR

H.OUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Specifications / Service Adjustments / Adjustments

Cont’d (1) / Adjustments

Cont’d (2) / AV Selector PCB / Safety Parts

 

Front Control Diagram / CRT Diagram / Main Diagram 1 / Main Diagram 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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