JVC AV-20N13/PH, AV-20N33/PH, AV-21D13/PH, AV-21D33/PH Service Manual

SERVICE MANUAL

COLOR TELEVISION

AV-21D13
AV-21D33
AV-20N13
AV-20N33

BASIC CHASSIS

RM-C372GY
[AV-21D13/PH]
[AV-20N13/PH]

RM-C373GY
[AV-21D33/PH]
[AV-20N33/PH]

AV-21D13
AV-21D33

AV-20N13
AV-20N33

[AV-21D13/PH]
[AV-21D33/PH]

/PH

/PH

/PH

/PH

GA2

[AV-20N13/PH]
[AV-20N33/PH]

CONTENTS

SPECIFICATIONS ････････････････････････････････

!

SAFETY PRECAUTIONS ････････････････････････････････

!

FEATURES････････････････････････････････

!

MAIN DIFFERENCE LIST ････････････････････････････････

!

FUNCTIONS ････････････････････････････････

!

SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････

!

SERVICE ADJUSTMENTS ････････････････････････････････

!

PARTS LIST ････････････････････････････････

!

★ OPERATING INSTRUCTIONS
★ STANDARD CIRCUIT DIAGRAM ････････････････････････････････

1

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･･･････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･･･････････････････････････････････

････････････････････････････････････････････････････････････････

･･･････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

････････････････････････････････････････････････

････････････････････････････････････････････････････････････････

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

･････････････････････････････ 2

･･････････････････････････････････････････････････････････

･･･････････････････････ 3

･･････････････････････････････････････････････

･･･････････････････････ 4

･･････････････････････････････････････････････

･･････････････････････････････････

････････････････････････････････････････････････････････････････

･････････････････････ 17

･･････････････････････････････････････････

････････････････････････････････････ 35

････････････････････････････････････････････････････････････････

･･･ 4

･･････

･･ 5

････

･････････････ 8

･･････････････････････････

････････････････ 2-1

････････････････････････････････

No.52022

Jul. 2002

Jul. 2002

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

SPECIFICATIONS

Items

Dimensions (W××××H××××D) 598mm×468mm×478mm 619mm×458mm×488mm

Mass 21.0kg 19.0kg

TV RF System CCIR (M)&(N)

Color / Sound System NTSC / PAL-M / PAL-N

TV Receiving Channels
and Frequency

CATV Receiving Channels
and Frequency

TV/CATV Total Channel 181 Channels

Intermediate Frequency Video IF Carrier

VL Band

VH Band

UHF Band

Low Band

High Band

Mid Band

Super Band

Hyper Band

Ultra Band

Sub Mid Band

Sound IF Carrier

AV-21D13

BTSC (Multi Channel Sound) [AV-21D33

(02～06) 54MHz～88MHz
(07～13) 174MHz～216MHz
(14～69) 470MHz～806MHz

(02～06)
(07～13)
(14～22)
(23～36)
(37～64)
(65～94, 100～125)
(01, 96～99)

45.75MHz

41.25MHz (4.5MHz)

/PH / AV-21D33/PH AV-20N13/PH / AV-20N33/PH

(54MHz～804MHz)

Contents

NTSC / PAL-M / PAL-N
BTSC (Multi Channel Sound) [AV-20N33

/PH]

/PH]

Color Sub Carrier NTSC : 3.579545MHz

PAL-M : 3.57561149MHz

PAL-N : 3.58205625MHz

Antenna terminal

Rated VoltagePower Input

Oper ating Voltage

Power Consumption 66W 60W

Picture Tube Vis ible size 51cm measured diagonally Vis ible size 48cm measured diagonally

High Voltage

Speaker

Audio Power Output

Input Video input

Audio input

Output

Headphone Jack Ster eo mini Jack (φ3.5mm)

Video output

Audio output

75Ω(VHF/UHF) Terminal,
F-Type Connector

110V～240V AC, 50Hz/60Hz
90V～260V AC, 50Hz/60Hz

26.5kV±1.0kV (at zero beam current)

5cm×12cm Oval type×2

2W (monaural) [AV-21D13

1.5W+1.5W (stereo) [AV-21D33

1V(p-p) 75Ω (RCA pin jack)

500mVrms (-4dBs) / High impedance
(RCA pin jack)

1V(p-p) 75Ω (RCA pin jack)

500mVrms (-4dBs) / Low impedance
(RCA pin jack)

/PH

]

/PH

]

/PH

2W (monaural) [AV-20N13

1.5W+1.5W (stereo) [AV-20N33

]

/PH

]

Remote Control Unit RM-C372GY [AV-21D13

RM-C373GY [AV-21D33
(AA/R6/UM-3 battery×2)

/PH

/PH

]

]

RM-C372GY [AV-20N13

RM-C373GY [AV-20N33
(AA/R6/UM-3 battery×2)

/PH

/PH

]

]

Design & specifications are subject to change without notice.

2

No.52022

A

A

A

A

SAFETY PRECAUTIONS

V-21D13
V-21D33
V-20N13
V-20N33

1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. For
continued protection, no changes should be made to the original
design unless authorized in writing by the manufacturer.
Replacement parts must be identic al 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 manufacturer
of responsibility for personal injury or property damage resulting
theref rom.

3. Many electric al and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement
parts which have these special safety characteristics are
identified in the parts list of Service manual. Electrical

components having such features are identified by shading
on the schematics and by (!!!!) on the parts list in Service
manual. The use of a subst itute replacement which does not

have the s ame safety characteristics as the recommended
replacement part shown in the parts list of Service manual may
cause shock, fire, or other hazards.

4. Don't short between the LIVE side ground and ISOLATED

(NEUTRAL) side ground or EARTH side ground when
repairing.

Some model's power circuit is partly different in the GND. The
differenc e of the GND is shown by the LIVE : (") side GND, the
ISOLATED(NEUTRAL) : (#) side GND and EARTH : ($) side
GND. Don't short between the LIVE side GND and
ISOLATED(NEUTRAL) side GND or EARTH side GND and
never meas ure with a measuring apparatus (oscilloscope etc.)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the same time.
If above note will not be kept, a fuse or any parts will be broken.

5. If any repair has been made to the chassis, it is recommended
that the B1 setting should be checked or adjusted (See
ADJUSTMENT OF B1 POWER SUPPLY).

6. The high voltage applied to the picture tube must conform with
that specified in Service manual. Excessive high voltage can
cause an incr ease in X-Ray emission, arcing and possible
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
prevented. If severe arcing occurs, remove the AC power
immediately and det ermine the caus e by visual inspection
(incorrect installation, cr acked or melted high voltage harness,
poor soldering, etc.). To maintain the proper minimum level of
soft X-Ray emission, components in the high voltage circuitry
including the picture tube must be the exact replacements or
alternatives approved by the manuf actur er of the complete
product.

7. 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 anode button.

8. When service is requir ed, obser ve the original lead dress. Extra
precaution should be given to assure correct lead dress in the
high voltage circuit area. W here a short circuit has occurred,
those components that indicat e evidenc e of overheating should
be replaced. Always us e the manufacturer's replacement
components.

9. Isolation Check

(Safety for Electrical Shock Hazard)

After re-assembling the product, always perf orm an isolation
check on the exposed metal parts of the cabinet (antenna
terminals, video/audio input and output terminals, Control knobs,
metal c abinet, screwheads, earphone jack, c ontrol shafts, etc.)
to be sure the product is safe to operat e without danger of
electr ical shoc k.

(1) Dielectr ic Strength Test

The isolation between the AC primary circuit and all metal parts
exposed to the user, particularly any expos ed metal part having a
return path to the chass is should withstand a voltage of 3000V
AC (r.m.s.) for a period of one second.

(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an applianc e

rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated
200V or more, for a period of one second.)
This method of test requires a test equipment not generally found
in the s ervice trade.

(2) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer dur ing this check.). Using a "Leakage
Current T ester", measure the leakage current from each exposed
metal part of the cabinet, particularly any exposed metal part
having a return path to the chassis, to a known good earth
ground (water pipe, etc.). Any leakage c urrent must not exceed

0.5mA AC (r.m.s.).
However, in tr opical area, this must not exceed 0.2mA AC
(r.m.s.).

"""" Alternate Check Method

Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Use an AC volt meter
having 1000 ohms per volt or more sensitivity in the following
manner. Connect a 1500Ω 10W resistor paralleled by a 0.15µF
AC-type capacitor between an expos ed metal part and a known
good earth ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the resistor
connection to each exposed metal part, particularly any exposed
metal part having a return path to the chassis, and measure the
AC voltage across the resist or. Now, reverse the plug in the AC
outlet and repeat each measurement. Any voltage meas ured
must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA
AC (r.m.s.).
However, in tr opical area, this must not exc eed 0.3V AC (r.m.s.).
This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER
(HAVING 1000 Ω/V,
OR MORE SENSITIVITY)

0.15μF AC-TYPE

PLACE THIS PROBE

1500 Ω 10W

GOOD EARTH GROUND

ON EACH EXPOSED
METAL PART

No.52022

3

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

FEATURES

" New chas sis design enables use of a main board with simplified

circuitry.

" Provided with miniatur e tuner (TV/CATV).
" PLL synthesizer system TV/CATV totaling 181 channels.
" Multifunctional remote control permits picture adjustment.
" With NTSC/PAL-M&PAL-N color/sound systems.

" Adoption of the VIDEO STATUS func tion.
" With 75ΩV/U in common (F-Type) ANT Terminal.
" Wide range rated voltage (110V～240V) AC power input.

" Clos ed-caption broadcasts can be viewed.

MAIN DIFFERENCE LIST

Model Name

!

Part Name(Item)

MAIN PW B SGA-1062A SGA-1061A SGA-1064A SGA-1063A

REMOTE CONTROL UNIT RM-C372GY-1H RM-C373GY-1H RM-C372GY-1H RM-C373GY-1H

!

FRONT CABINET LC11129-019A-H LC11129-020A-H LC10438-030A-H LC10438-031A-H

!

REAR COVER GG10130-007A-H LC10448-003A-HK

!

PICTURE TUBE A51LEC065X A48KXR064X

TERMINAL SHEET GG30058-002A-H GG30058-001A-H GG30058-002A-H GG30058-001A-H

AV-21D13

/PH

AV-20D33

/PH

AV-20N13

/PH

AV-20N33

/PH

SPEAKER CEBSS12D-07KJ2 CEBSS12D-04KJ2 CEBSS12D-07KJ2 CEBSS12D-04KJ2

PACKING CASE GG10056-076A-H GG10056-078A-H GG10056-074A-H GG10056-075A-H

NTSC / PAL-M / PAL-N

Color / Sound System NTSC / PAL-M / PAL-N

Power Consumption 66W

Speaker

Audio Power Output 2W (monaural) 1.5W+1.5W (stereo) 2W (monaural) 1.5W+1.5W (stereo)

5× 12cm Oval type×2

(monaural)

BTSC(Multi Channel

Sound)

5× 12cm Oval type×2

(stereo)

NTSC / PAL-M / PAL-N

60W

5× 12cm Oval type×2

(monaural)

NTSC / PAL-M / PAL-N

BTSC(Multi Channel

Sound)

5× 12cm Oval type×2

(stereo)

4

No.52022

A

A

A

A

FUNCTIONS

■ FRONT PANEL

V-21D13
V-21D33
V-20N13
V-20N33

910

[AV-21D33/PH]

■ REAR TERMINAL

2

[AV-21D13/PH]

10 9 1 2 3 4 5 6 7 8

2

1

4

3

1

MENU butt ons

CHANNEL －/＋ buttons

2

VOLUME －/＋ buttons

3

AI ECO sensor

4

REMOTE CONTROL sensor

5

ON TIMER lamp

6

POWER lamp

7

MAIN POWER button

8

A/V INPUT terminal

9

HEADPHONE jack

10

5

1

6

3

[AV-21D13/PH]

1

ANT Terminal

2

VIDEO INPUT Terminal

3

AUDIO INPUT Terminal

4

VIDEO OUTPUT Terminal

5

AUDIO OUTPUT Terminal

5

4

[AV-21D33/PH]

ANT Terminal

1

VIDEO INPUT Terminal

2

AUDIO L/MONO INPUT Terminal

3

AUDIO R IN PUT Terminal

4

VIDEO OUTPUT Terminal

5

AUDIO L OUTPUT Terminal

6

AUDIO R OUTPUT Terminal

7

7

No. 52022

5

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

■ FRONT PANEL

9

10

[AV-20N33/PH]

10 9

■ REAR TERMINAL

2

[AV-20N13/PH]

1

3 4

2

5

7

6

1

4

8

2

3

1

MENU butt ons

CHANNEL －/＋ buttons

2

VOLUME －/＋ buttons

3

4

AI ECO sensor

5

REMOTE CONTROL sensor

6

ON TIMER lamp

7

POWER lamp

8

MAIN POWER button

9

A/V INPUT terminal

10

HEADPHONE jack

5

1

6

3

[AV-20N13/PH]

1

ANT Terminal

VIDEO INPUT Terminal

2

AUDIO INPUT Terminal

3

4

VIDEO OUTPUT Terminal

AUDIO OUTPUT Terminal

5

5

4

[AV-20N33/PH]

1

ANT Terminal

VIDEO INPUT Terminal

2

AUDIO L/MONO INPUT Terminal

3

AUDIO R IN PUT Terminal

4

VIDEO OUTPUT Terminal

5

AUDIO L OUTPUT Terminal

6

AUDIO R OUTPUT Terminal

7

7

6

No. 52022

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

■ REMOTE CONTROL UNIT

1

2

3

4

5

6

7

8

9

10

This illustration is written about RM-C373GY(AV-21D33/PH
& AV-20N33/PH),There are no key of HYPER SURROUND in
the RM-C372GY(AV-21D13/PH & AV-20N 13/PH).

11

12

13

14

15

16

17

TV/VIDEO key

1

DISPLAY key

2

PICTURE BOOSTER key

3

CLOSED CAPTION key

4

SLEEP TIMER key

5

VIDEO STATUS key

6

COLOUR SYSTEM key

7

100＋key

8

EXIT key

9

CHANNEL－/＋ key

10

POWER key

11

Number (CH.) keys

12

RETURN＋key

13

HYPER SURROUND key

14

[AV-21D33

MENU key

15

MENU ▲/▼ key
MENU －/＋ key

MUTING key

16

17

VOLUME－/＋ key

/PH &

AV-20N33

/PH

Only]

No. 52022

7

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unplug the power plug.

screws marked

2. As shown in figure, remove the
2 screws marked

3. Withdr aw the rear cover toward you.

""""

.

7

REMOVING THE PW BOARD

" After removing the rear cover.

1. Slightly raise the both sides of the PW BOARD by hand.

2. Withdr aw the PW BOARD backward.
(If necessary, take off the wire clamp, connectors etc.)

REMOVING THE SPEAKER

" After removing the rear cover.

screws marked

1. As shown in figure, remove the

2. Follow the same steps when r emoving the other hand speak er.

2

####

!!!!

.

and the

CHECKING THE PW BOARD

1. To check the back side of the PW Board.

1) Pull out the PW Board. (Refer to REMOVING THE MAIN PW
Board)

2) Erect the PW Board vertically so that you c an easily check the
back side of the PW Board.

[CAUTION]

" When erecting the PW Board, be careful so that there will be no

contac ting with oth er PW Boar d.

" Before turning on power, make sure that the CRT earth wire and

other connector are properly connected.

WIRE CLAMPING AND CABLE TYING

1. Be sure t o clamp the wire.

2. Never remove the cable tie used for tying t he wires together.
Should it be inadvertently removed, be sure to tie the wires with a
new cable tie.

8

No. 52022

A

A

A

A

FRONT CABI.

A

A

SPEAKER

CRT SOCKET

PWB

PW BOARD

V-21D13
V-21D33
V-20N13
V-20N33

This exploded view describes

/PH

about AV-21D13

Although AV-21D33

different from this figure, you

can use the exploded view for

disassembling the AV-21D33

in the same step as for the AV-

/PH.

21D13

C

（×

（×2））））

（×（×

.

/PH

is slightly

/PH

SPEAKER

POWER

CORD

（×

（×2））））

（×（×

C

V-21D13/PH

V-21D33/PH

REAR

COVER

A

（×

（×7））））

（×（×

No. 52022

B

（×

（×2））））

（×（×

9

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unplug the power plug.

screws marked

2. As shown in figure, remove the

screws marked

2

3. Withdraw the rear cover toward you.

""""

.

6

REMOVING THE PW BOARD

" After removing the rear cover.

1. Slightly raise the both sides of the PW Board by hand.

2. Withdr aw the PW Board backward.
(If necessary, take off the wire clamp, connectors etc.)

REMOVING THE SPEAKER

" After removing the rear cover.

screws marked

1. As shown in figure, remove the

2. Follow the same steps when r emoving the other hand speak er.

2

CHECKING THE PW BOARD

1. To check the back side of the PW Board.

1) Pull out the PW Board. (Refer to REMOVING THE MAIN PW
Board)

2) Erect the PW Board vertically so that you c an easily check the

back side of the PW Board.

[CAUTION]

" When erecting the PW Board, be careful so that there will be no

contac ting with oth er PW Boar d.

" Before turning on power, make sure that the CRT earth wire and

other connector are properly connected.

####

!!!!

.

and the

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie us ed for tying the wires together.
Should it be inadvertently removed, be sure to tie the wires with a
new cable tie.

10

No. 52022

A

A

A

A

FRONT CABI.

SPEAKER

V-21D13
V-21D33
V-20N13
V-20N33

This exploded view describes

/PH

about AV-20N13

Although AV-20N33

different from this figure, you

can use the exploded view for

disassembling the AV-20N33

in the same step as for the AV-

PH.

20N13/

.

/PH is slightly

/PH

SPEAKER

REAR

COVER

C

(××××2)

POWER

CORD

CRT SOCKET

PWB

PW BOARD

C

(××××2)

-

-

B

(××××2)

A

(××××6)

No. 52022

11

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

MEMORY IC REPLACEMENT

1. Memory IC

This model uses a memory IC.
The memory IC stores data for proper operation of video and deflection circuits.
When replacing, be sure to us e an IC c ontaining this (initial value) data.

2. Memory IC replacement procedure

(1) Power off

Switch off the power and disc onnect the power cord from the wall
outlet.

(5) Receive channel setting

Refer to the OPERATING INSTRUCTIONS (USER’S GUIDE)
and set the receive channels (Channels Preset) as described.

(2) Replace the memory IC.

Be sure to use memory ICs written with the initial data values.

(3) Power on

Connect the power cord to the wall outlet and switch on the
power.

(4) System constant check and setting

1) Simultaneously press the DISPLAY key and VIDEO STATUS
key of the remote control unit.

2) The SERVICE MENU screen of Fig.1 is displayed.

3) While the SERVICE MENU is displayed, again simultaneously
press the DISPLAY and VIDEO STAT US keys to display the
Fig.2 SYSTEM CONSTANT screen.

4) Refer to the SYSTEM CONSTANT table and check the setting
items. W here thes e differ, s elect the setting item with the
MENU UP / DOWN key and adjust the setting value with the
MENU LEFT / RIGHT keys.

5) After adjusting, release the MENU LEFT / RIGHT key to store
the setting value.

6) Press the EXIT key twic e to return the normal screen.

NAME OF REMOTE CONTROL KEYS

(6) User settings

Check the user setting items according to Table 2.
Where these do not agree, refer to the OPERATING
INSTRUCTIONS (USER ’ S GUIDE) and set the items as
described.

(7) SERVICE MENU setting

Verify what to s et in the SERVICE MENU, and s et whatever is
necessary. (Fig.1) Refer to the SERVISE ADJUSTMENT for
setting.

SERVICE MENU

PICTURE SOUND
VIDEO STATUS OTHERS
LOW LIGHT HIGH LIGHT
RF AFC CHK
VCO (CW) I2C BUS CTRL
SETUP TOUR(OFF)

Fig.1

EXIT BY

EXIT

IT

AV-21D33/PH

SELECT BY
OPERATE BY

AV-20N33/PH

Only

DISPLAY

Key

VIDEO STATUS

Key

EXIT

Key

MENU －
(LEFT) Key

This illustr ation is written about RM-C373GY(AV-21D33/PH &

AV-20N33/PH),There are no key of HYPER SURROUND in the

RM-C372GY(AV-21D 13/PH & AV-20N 13/PH).

12

POWER Key

NUMBER Key

MENU
(UP) Key

MENU ＋
(RIGHT) Key

MENU
(DOWN) Key

No.52022

SYSTEM CONSTANT

VIDEO :
AUDIO :
VARI. OUT : NO
GAME : YES
CINEMA : YES

SELECT BY
OPERATE BY

SYSTEM CONSTANT

CCD : YES
RETURN+ : YES
SURROUND :

M37272M8-

SELECT BY
OPERATE BY

×××

×××

××××××

SP

****
***

***

******

***

***

******

Fig.2

EXIT BY

EXIT

EXIT BY

EXIT

A

A

A

A

TABLE 1(System Constant Setting)

Setting value

Setting item Setting content

VIDEO 1 2

AUDIO MONO MTS

MONO MONO MTS

12

AV-21D13
AV-20N13

/PH

/PH

AV-21D33
AV-20N33

V-21D13
V-21D33
V-20N13
V-20N33

/PH

/PH

VARI. OUT NO NO

GAME YES YES

CINEMA YES YES

CCD YES YES

RETURN+ YES YES

SURROUND NO YES

YES NO

YES NO

YES NO

YES NO

YES NO

YES NO

TABLE 2 (User setting value)

Setting item Setting value

" Setting of FUNCTION

MAIN POWER OFF

SUB POWER ON

CHANNEL CH 02 (AIR)

PICTURE BOOSTER OFF

VOLUME 10

TV/VIDEO TV

CAPTION OFF (CC1/T1)

DISPLAY POSITION INDICATION

SLEEP TIMER 0

VIDEO STATUS STANDARD

HYPER SURROUND OFF [ AV-21D33

COLOUR SYSTEM AUTO PAL

SETUP TOUR ON

" Setting of MENU

TINT

COLOR

PICTURE STANDARD

BRIGHT

DETAIL

BASS CENTER

TREBLE CENTER

BALANCE CENTER

MTS STEREO

SET CLOCK Unnecessary to set : (000)

ON/OFF TIMER NO

CHANNEL SUMMARY necessary to set

NOISE MUTING OFF

BACK GROUND BLACK

CLOSED CAPTION CC1 / T1 ( OFF at shipping )

LANGUAGE ENG.

[ AV-21D33

/PH

& AV-20N33

/PH

/PH

& AV-20N33

Only ]

/PH

Only ]

No.52022

13

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

INITIAL SETTING VALUE OF SERVICE MENU

1. Adjustment of the SERVICE MENU is made on the basis of the initial setting values; however, the new setting values which set the
screen in its optimum condition may differ from the initial setting.

2. Do not change the initial Setting Values of the Setting (Adjustment) items not listed In “ADJUSTM ENT”.

PICTURE MODE (1/2)

""""

" The four setting items in the video mode No.8 EXT PIC., No.9 EXT BRI., No.10 EXT COL. and No.11 EXT TINT are linked to the items in

the TV MODE No.1 PICTURE, No.2 BRIGHT, No.5 COL. NTSC and No.6 TINT, respectively. W hen the setting items in the TV mode are
adjusted, the values in the setting items in the video mode are revised automatically to the s ame values in the TV mode.(The initial setting
values given in ( ) ar e off-set values.)

" When the four items (No.8, 9, 10 and 11) are adjusted in the video mode, the setting values in each item are revised independently.

: Do not adjust in this area.

Initial setting value

No. Setting (Adjustment) item Variable range AV-21D13/PH

AV-21D33

1. PICTURE

2. BRIGHT

3. COL. PALM

4. COL. PALN

5. COL. NTSC

6. TINT

7. TV DTL

8. EXT PIC.

9. EXT BRI.

10. EXT COL.

11. EXT TINT

12. EXT DTL

13. P/N KILL 000 / 001 001 001

14. Y S CONT

15. TV Y-DL

16. EXR Y-DL

17. WPL SW 000 / 001

18. Y G AMMA 000 / 001

19. P/N G P. 000 / 001

20. COL. L SW 000 / 001

21. COL. LMT.

22. PN C. ATT

23. OFST. SW 000 / 001 000 000

24. OFSET. B-Y

25. OFSET. R-Y

26. C-TOF SW 000 / 001 001 001

27. TV T FO

28. TV T Q

29. EXT T FO

30. EXT T Q

31. C-TRAP 000 / 001

32. C-TR. FO

33. C-TRAP Q

34. FIX B/W 000 / 001

35. APA P. FO

36. DC TRAN.

37. B. ST. SW 000 / 001

38. B. ST. PO.

39. ABL GAIN

40. ABL PO.

000～127
000～127
000～127
000～127
000～127
000～127
000～063

±025
±025 (±005) (±005)
±025 (±000) (±000)

±025

000～063

000～031
000～007
000～007

000～003
000～003

000～015
000～015

000～003
000～003
000～003
000～003

000～003
000～003

000～003
000～007

000～001
000～007
000～007

(±000) (±000)

(+001) (+001)

/PH

064 070
064 060
070 070
070 070
073 072

068 065

033 033

035 035

031 031
001 001

002 002
000 000
000 000
000 000
001 001

001 001
001 001

008 008
008 008

001 001
000 000
000 000
000 000

000 000

002 002
000 000
000 000
001 001

007 007
000 000
000 000
004 004
000 000

AV-20N13/PH
AV-20N33

/PH

14

No.52022

A

A

A

A

PICTURE MODE (2/2)

"

Initial setting value

No. Setting (Adjustment) item Variable range

41. HALF T.

42. DRV G SW 000 / 001 000 000

43. NT. COMB 000 / 001 001 001

44. COIN DET

45. NOISE L.

46. VCD MODE 000 / 001 000 000

47. V AGC SP 000 / 001 000 000

48. H POS. 50

49. H BLK. 50

50. V POS. 50

51. V SIZE50

52. V S CR50

53. V LIN . 50

54. H POS. 60

55. H BLK. 60

56. V POS. 60

57. V SIZE60

58. V S CR60

59. V LIN . 60

60. RF AGC

000～002

000～003
000～003

000～031
000～007
000～007
000～127
000～127

000～031
000～031
000～007
000～007
000～127
000～127
000～031
000～255

AV-21D13
AV-21D33

/PH

/PH

001 001

001 001
003 003

007 007
000 000
000 000
087 080
028 028

004 004
012 012
000 000
000 000
088 082
048 048
004 003
183 183

AV-20N13
AV-20N33

V-21D13
V-21D33
V-20N13
V-20N33

/PH

/PH

SOUND MODE

"

No. Setting (Adjustment) item Variable range Initial setting value

1. NOISE 000 / 001 001

2. IN LE VEL

3. FH MON. 000 / 001 000

4. ST VCO

5. PILOT 000 / 001 000

6. FILTER

7. LOW SEP.

8. HI SEP.

9. 5FH MON. 000 / 001 000

10. SAP VCO

11. IN GAIN 000 / 001 000

12. FIL. OFF.

VIDEO STATUS MODE

"

No. Setting (Adjustment) item Variable range

1. TINT

2. COLOR

3. PICTURE

4. BRIGHT

5. DETAIL

6. G DRIVE

7. B DRIVE

8. R CUT.

9. G CUT.

10. B CUT.

[ AV-21D33

& AV-20N33

/PH

Only ]

/PH

000～063

000～063

000～063
000～063
000～063

000～063

±010 (±000)

CINEMA GAME

±20 (±0) (±0)
±20 －3 －3
±20 －10 －10
±20 (±0) (±0)

±15 (±0) －5
－99～+50 －22 (±0)
－99～+50 －54 (±0)

±10 (±0) (±0)

±10 (±0) (±0)

±10 (±0) (±0)

020

025

030
022
023

026

Initial setting value

No.52022

15

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

OTHERS MODE

"

No. Setting (Adjustment) item Variable range Initial setting value

1. OSD HP

2. OSD VP

3. H-CK SW 000 / 001 000

LOW LIGHT MODE

"

No. Setting (Adjustment) item Variable range Initial setting value

1. R CUTOFF

2. G CUTOFF

3. B CUTOFF

HIGH LIGHT MODE

"

No. Setting (Adjustment) item Variable range Initial setting value

1. G DRIVE

2. B DRIVE

RF AFC CHK MODE

"

No. Setting (Adjustment) item Variable range Initial setting value

000～031
000～015

000～255
000～255
000～255

000～255
000～255

023
012

020
020
020

128
128

1. RF AFC ON / OFF ON

2. FINE

2

C BUS CTRL MODE

I

"

No. Setting (Adjustment) item Variable range Initial setting value

1. I2C BUS ON / OFF [Fixed ON]

－77～+77

± ＊＊

(DO NOT ADJUST)

16

No.52022

A

A

A

A

SERVICE ADJUSTMENTS

ADJUSTMENT PREPARATION

1. You can make the necessary adjust ments for this unit with
either the Remote Control Unit or With the adjustment tools
and parts as given belo w.

2. Adjustment with the Remote Control Unit is made on the
basis of the initial setting values, however, the new setting
values which set the screen to its optimum condition may
differ from the initial settings.

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

4. Turn on t he power of the set and equipment before use, and
start the adjustment procedures after waiting at least 30 minutes.

5. Unless otherwise specified, prepare the most suitable reception
or input signal for adjustment.

6. Never touch any adjustment parts, which are not specified
in the list for this adjustment VRs, transforms, condensers,
etc.

7. Preparation for adjustment
Unless otherwise specified in the adjustment instructions, pr eset
the following functions with the REMOTE CONTROL UNIT.

User mode position

VIDEO STATUS STANDARD

TINT / COLOUR
/ PICTURE / BRIGHT
/ DETAIL

BASS / TREBLE

/ BALANCE

MTS

HYPER SURROUND

STANDARD

CENTER

[AV-21D33

STEREO

[AV-21D33

OFF

[AV-21D33

V-21D13
V-21D33
V-20N13
V-20N33

/PH

& AV-20N33

/PH & AV-20N33/PH]

/PH

& AV-20N33

/PH

/PH

]

]

SETUP TOUR ON

ADJUSTMENT EQUIPMENT

1. DC voltmeter (or digital voltmeter)

2. Oscill oscope

3. Signal generator (Pattern generator) [NTSC / PAL-M / PAL-N ]

4. Remote contr ol unit

5. TV audio multiplex signal generator.

6. Frequ ency c ounter.

ADJUSTMENT ITEMS

Adjustment item Adjustment item

B1 POWER SUPPLY

IF VCO adjustment VIDEO / CHROMA adjustment

RF AGC adjustment

FOCUS adjustment PURITY / CONVERGENCE adjustment.

DEFLECTION adjustment

MTS circuit adjustment [AV-21D33

/PH

& AV-20N33

/PH

]

No.52022

17

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

BASIC OPERATION IN SERVICE MENU

1. TOOL OF SERVICE MENU OPERATION

Operate the SERVICE MENU with the REMOTE CONTROL UNIT.

2. SERVICE MENU ITEMS

In general basic setting (adjustments) items or ver ifications are performed in the SERVICE MENU.

(1) PICTURE･･･････････････････ This set the setting values (adjustment values) of the VIDEO/CHROMA and DEFLECTION circuits.
(2) SOUND ････････････････････ This set the setting values (adjustment values) of the AUDIO circuit.[AV-21D33
(3) VIDEO STATUS ･････････････ This is used when the THEATER and GAME MODE is adjust ed.
(4) OTHERS ･･･････････････････ This is us ed when the OT HERS MODE is adjusted.
(5) LOW LIGHT･････････････････ This sets the setting values (adjustment values) of the W HITE BALANCE circuit.
(6) HIGH LIGHT ････････････････ This sets the setting values (adjustment values) of the WHITE BALANCE circuit.
(7) RF AFC CHK････････････････ This is us ed when the RF AFC CHK MODE is verified. [Do not adjust]
(8) VCO (CW) ･･････････････････ This is used when the IF VCO is adjusted.

2

(9) I

C BUS CTRL･･･････････････ This is us ed when ON/OFF of the I2C BUS CTRL is set. [Fixed ON]

(10)

SETUP TOUR OFF･･････････ It should be able to select mode (LANGUAGE and SET CLOCK).

[Should be OFF]

3. Basic Operations of the SERVIC E MENU
(1) How to enter the SERVICE MENU.

Press the DISPLAY key and VIDEO STATUS key of the remote control unit
at the s ame time to enter the SERVICE MENU screen ①

shown in figure page later.

(2) SERVICE MENU screen selection

Press the UP / DOWN key of the MENU to select any of the
following items.

SERVICE MENU

PICTURE SOUND
VIDEO STATUS OTHERS
LOW LIGHT HIGH LIGHT
RF AFC CHK
VCO (CW) I2C BUS CTRL
SETUP TOUR(OFF)

SELECT BY
OPERATE BY

(The letters of the selected items are displayed in yellow.)

/PH & AV-20N33/PH]

EXIT BY

EXIT

IT

(3) Enter the any setting ( adjustment ) mode

" PICTURE, SOUND and OTHERS mode

AV-21D33
AV-20N33/PH

1) If select any of PICTURE, SOUND or OTHERS items, and the LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN

MENU ), the screen ② will be displayed as shown in figure page later.

2) Then the UP / DOW N key is pressed, the PICTURE mode screen ③ or the SOUND mode screen ④ or the OTHERS mode
screen ⑤ is displayed, and the PICTURE, SOUND or OTHERS setting can be performed.

" VIDEO STATUS, LOW LIGHT, HIGH LIGHT, RF AFC CHK, VCO (CW) and I

1) If select any of VIDEO STATUS / LOW LIGHT / HIGH LIGHT / RF AFC CHK / VCO (CW) / I

2

C BUS CTRL mode

2

C BUS CTRL items, and t he LEFT

/ RIGHT key is pressed from SERVICE MENU ( MAIN MENU ), the screens ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ will be displayed as shown in

figure page later.

2) Then the settings or verifications can be performed.

" SETUP TOUR OFF mode

1) If select of SETUP TOUR OFF item from SERVICE MENU , and you can change the ON or OFF(should be OFF).

(Should be OFF)

% If it is ON, then you turn the TV power off, when you are turn the TV power on again.

The JVC is logo will be shown about 15 seconds automatic ally.

2) MENU -/+ Key ･････････････ Select Language.

3) MENU ▼ Key･････････････ Auto Search.

/PH

Only

18

No.52022

A

A

A

A

(4) Setting method

1) UP / DOW N key of the MENU
Select the SETTING ITEM.

2) LEFT / RIGHT key of the MENU
Setting (adjust) the SETTING VALUE of the SETTING ITEM.
When the key is released the SETT ING VALUE will be stored
(memorized).

3) EXIT key
Returns to the previous scr een.

[NOTE] (PICTURE MODE ONLY)

When the INITIAL SETTING VALUE is turned to yellow, you can adjust the
values but you cannot adjust the values when it is turned to red.
(Becaus e the signal conditions, etc. are not met.)

(5) Releasing SERVICE MENU

1) After returning to the SERVICE MENU upon completion of the setting

(adjustment) work, press the EXIT key again.

SETTING
ITEM

1. PICTURE

********

******** ****

****************

SELECT BY
OPERATE BY

SETTING
VALUE

***

***

******
****

********

EXIT BY

EXIT

PICTURE MODE

1. NOISE
STATUS

********

********

******** ********

SELECT BY
OPERATE BY

***

***

******

EXIT BY

EXIT

V-21D13
V-21D33
V-20N13
V-20N33

IT

IT

★ The s ettings for LOW LIGHT and HIGH LIGHT are described in the W HITE

BALANCE page of ADJUSTMENT.

★ The setting for VCO (CW ) are described in the IF VCO page of ADJUSTMENT .

The letter of the

selected

Items are displayed in yellow.

CINEMA

TINT G DRIVE
COLOR B DRIVE
PICTURE R CUT.
BRIGHT G CUT.
DETAIL B CUT.

SELECT BY
OPERATE BY

***

*** ***

******
***

*** ***

******
***

*** ***

******
***

*** ***

******
***

*** ***

******

EXIT BY

EXIT

***

******
***

******
***

******
***

******
***

******

Press

VIDEO

STAT US

Key

[ AV-21D33

SELECT BY
OPERATE BY

/PH &

1. OSD HP

AV-20N33

OTHERS MODE

GAME

SOUND MODE

TINT G DRIVE
COLOR B DRIVE
PICTURE R CUT.
BRIGHT G CUT.
DETAIL B CUT.

SELECT BY
OPERATE BY

***

*** ***

******
***

*** ***

******
***

*** ***

******
***

*** ***

******
***

*** ***

******

/PH

***

***

******

EXIT BY

EXIT

EXIT BY

EXIT

***

******
***

******
***

******
***

******
***

******

IT

Only ]

VIDEO STATUS MODE

No.52022

19

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

SERVICE MENU FLOW CHART

SERVICE MENU (MAIN MENU)

①

①

① ①

SERVICE MENU

PICTURE SOUND
VIDEO STATUS OTHERS
LOW LIGHT HIGH LIGHT
RF AFC CHK
VCO (CW) I2C BUS CTRL
SETUP TOUR OFF

SELECT BY
OPERATE BY

AV-21D33/PH

ON / OFF

⑧

⑧

⑧ ⑧

RF AFC CHK MODE

⑨

⑨

⑨ ⑨

AV-20N33/PH

HIGH LIGHT MODE

HIGH LIGHT

***

*** ***

******

EXIT BY

EXIT

***

******

EXIT BY

EXIT

DO NOT ADJUST

Only

SCREEN

②

②

② ②

SELECT BY EXIT BY

AV-21D33/PH

SOUND MODE

④

④

④ ④

1. NOISE
STATUS

SELECT BY
OPERATE BY

AV-20N33/PH

***

***

******

********

********

****************

EXIT BY

EXIT

EXIT

Only

PICTURE MODE

③

③

③ ③

1. PICTURE

********

******** ****

****************

SELECT BY
OPERATE BY

OTHERS MODE

⑤

⑤

⑤ ⑤

1. OSD HP

SELECT BY
OPERATE BY

***

***

******
****

********

EXIT BY

EXIT

***

***

******

EXIT BY

EXIT

RF AFC ON
FINE

SELECT BY
OPERATE BY

VCO (CW) MODE

⑩

⑩

⑩ ⑩

TOO HIGH
ABOVE REFERENCE
BELOW REFERE NCE
TOO LOW

SYNC : YES

I2C BUS CTRL MODE

⑪

⑪

⑪ ⑪

I2C BUS ON

OPERATE BY

***

***

******

EXIT BY

EXIT

EXIT BY

EXIT

FIXED ON

EXIT BY

EXIT

VIDEO STATUS MODE

⑥

⑥

⑥ ⑥

CINEMA

TINT G DRIVE
COLOR B DRIVE
PICTURE R CUT .
BRIGHT G CUT.
DETAIL B CUT.

SELECT BY

IT

OPERATE BY

BRIGHT

***

*** ***

******

***

*** ***

******

***

*** ***

******

***

*** ***

******

***

*** ***

******

EXIT BY

LOW LIGHT MODE

⑦

⑦

⑦ ⑦

BRIGHT

***

*** *** ***

*** ***

***

***

******
*** ***

*** ****** ***

EXIT BY

EXIT

EXIT

***

******
***

******
***

******
***

******
***

******

Press

VIDEO

STATUS

Key

GAME

TINT G DRIVE
COLOR B DRIVE
PICTURE R CUT.
BRIGHT G CUT.
DETAIL B CUT.

SELECT BY
OPERATE BY

***

*** ***

******

***

*** ***

******

***

*** ***

******

***

*** ***

******

***

*** ***

******

EXIT BY

EXIT

***

******
***

******
***

******
***

******
***

******

20

No.52022

A

A

A

A

ADJUSTMENT LOCATIONS

V-21D13
V-21D33
V-20N13
V-20N33

FRONT

DEG

S901

POWER

SW

TOP

MAIN PWB

PW

F901

CRT SOCKET PWB

(SOLDER SIDE)

TP-47B

T

E1

TP-E( )

IC701

MEMORY IC

T

(Within MAIN PW B)

U

CRT EARTH

(BRAIDED ASS'Y)

AV-21D13/PH & AV-20N13/PH

IC704

AV IN

S

AV-21D33/PH & AV-20N33/PH

[AV-21D33/PH & AV-20N33/PH Only]

AV-21D33/PH & AV-20N33/PH

AV-21D13/PH & AV-20N13/PH

IC201

MPX

AV IN/OUT

CW

15

T111

HV

U

HVT

B1

1

3

ANT

1Pin B1(TP-91)

3Pin TP-E( )

UPPER:F OCUS

LOWER:SCREEN

No.52022

21

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

ADJUSTMENTS

■■■■

B1 POWER SUPPLY

Item

Check of
B1 POWER
SUPPLY

Measurin g

instrument

DC Voltmeter B1 (

IF VCO ADJUSTMENT

Item

IF VCO
adjustment

Measurin g

instrument

Signal
generator

TOO HIGH
ABOVE REFERENCE
BELOW REFERENCE
TOO LOW

SYNC : YES

Test point Adjustment item Description

B1

Connector

pin)

1

(TP-91)

TP-E(#)
(

B1

Connector

pin)

3

Test point Adjustment item Description

CW TRANSF. (T111)

[ VCO (CW) ] mode

YELLOW

EXIT BY

EXIT

IT

1. Receive a black and whit e signal (c olor off). (NTSC)

2. Connect a DC voltmeter to TP-91(B1) and TP-E(#).

3. Confirm that the voltage is DC134.5V±2V.

" Under normal conditions, no adjustment is required.

1. Receive a broadc ast. (use channels without offset frequenc y).

2. Select the VCO(CW ) mode from the SERVICE MENU.

3. Confirm the color change (yellow) from TOO HIGH to TOO
LOW by CW TRANSF.(T111) and SYNC : YES being shown
on the screen. Then, adjust CW TRANSF.(T111) until BELOW
REFERENCE mark tur ns yellow and confirm again S YNC :
YES being shown on the screen.

RF AGC ADJUSTMENT

RF AGC
adjustment

Initial setting value

No. Setting item

60 RF AGC 183 183

AV-21D13
AV-21D33

/PH

/PH

FOCUS ADJUSTMENT

FOCUS
adjustment

Signal
generator

No.60 RF AGC 1. Receive a broadcast.

2. Select No.60 RF AGC of the PICTURE mode in SERVICE
MENU.

3. Press the MUTE key and turn off c olor.

4. With the MENU LEFT key, get noise in the screen picture. (0
side of setting value)

AV-20N13
AV-20N33/PH

FOCUS VR
[ In HVT ]

/PH

5. Press the MENU RIGHT key and stop when noise dis appears
from the screen.

6. Change to other channels and make sure that there is no
irregularity.

7. Press the MUTE key and get c olor out.

1. Receive a cross hatch signal.

2. While looking at the scr een, adjust FOCUS VR so that the
vertical and horizontal lines will be clear and in fine detail.

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

22

No.52022

A

A

A

A

DEFLECTION ADJUSTMENT

V-21D13
V-21D33
V-20N13
V-20N33

Item

Measurin g

Test point Adjustment item Description

instrument

V. HEIGHT,
V. POSITION,

Signal
generator

V. LIN.
V. S CR

adjustment

Initial setting value

No. Setting item

AV-21D13

/PH

AV-21D33/PH

56 V POS.60 000 000

57 V SIZE 60 088 082

58 V S CR60 048 048

59 V. LIN60 004 003

Scree size

Screen
size

(92%)

No.57 V SIZE 60
No.58 V S CR60
No.59 V. LIN. 60

AV-20N13/PH
AV-20N33/PH

No.50 V POS.50
No.51 V SIZE 50
No.52 V S CR50
No.53 V LIN.50

Picture
size

(100%)

[60Hz]No.56 V POS. 60

1. Receive a crosshatch signal.(NTSC or PAL-M)

2. Confirm that the value of PICTURE MODE No.56 V POS. 60 is

0.

3. Confirm the initial s etting value of the No.57 V SIZE 60, N o.58
V S CR60 and No.59 V LIN. 60.

4. Adjust the vertic al screen size to 92% with the P ICTURE
MODE No.57 V SIZE60.

5. Adjust the PICT URE MODE No.59 L LIN. 60 and No.58 V S
CR60 to get the best vertical linearity.

NOTE :

The PICTURE MODE No.56 V POS. 60 is fixed on value 0.

[50Hz]

1. Receive a crosshatch signal. (PAL-N)

2. Confirm the initial setting value of the No.50 V POS.50, No.51
V SIZE 50, No.52 V S CR 50 and No.53 V LIN.50.

3. Adjust the vertic al screen size to 92% with the P ICTURE
MODE No.51 V SIZE50.

4. Adjust the PICTURE MODE No.53 V LIN.50 and No.52 V S
CR50 to get the best vertical linearity.

5. Adjust the PICTURE MODE No.50 V POS.50 so that the
vertical center line c omes close to the CRT vertic al center as
much as possible.

" Readjust V SIZE, V LIN., V S CR if necessar y.

Initial setting value

No. Setting item

AV-21D13/PH
AV-21D33

/PH

AV-20N13
AV-20N33

/PH

/PH

(100%)

H. POSITION
adjustment

Picture size

Signal
generator

Initial setting value

No. Setting item

AV-21D13

/PH

AV-21D33/PH

54 H POS.60 012 012

Initial setting value

No. Setting item

AV-21D13
AV-21D33

/PH

/PH

48 H POS.50 007 007

AV-20N13

/PH

AV-20N33/PH

No.48 H POS.50

AV-20N13
AV-20N33

/PH

/PH

50 V POS.50 000 000

51 V SIZE 50 087 080

52 V S CR50 028 028

53 V LIN.50 004 004

[60Hz]No.54 H POS.60

1. Receive a cross hatch signal. (NTSC or PAL-M)

2. Select the No.54 H POS. 60 of the PICTURE mode in

SERVICE MENU.

3. Confirm the initial s etting value of the No.54 H POS. 60.

4. Adjust the No.54 H POS. 60 until the screen will be horizontally

centered.

[50Hz]

1. Receive a cross hatch signal. (PAL-N)

2. Select the No.48 H POS. 50 of the PICTURE mode in

SERVICE MENU.

3. Confirm the initial s etting value of the No.48 H POS. 50.

4. Adjust the No.48 H POS. 50 until the screen will be horizontally

centered.

No.52022

23

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

VIDEO / CHROMA ADJUSTMENT

Item

WHITE
BALANCE
(Low Light)
adjustment

Measurin g

Test point Adjustment item Description

instrument

Signal
generator
Remote
control unit

[LOW LIGHT] MODE

R CUTOFF

G CUTOFF

BRIGHT

***

BRIGHT

BRIGHT

Remote Control Unit

H.LINE ON

1 2

R CUTOFF

4 5

R CUTOFF

7 8

***

******

*** *** ***

*** *** ***

*** *** ****** *** ***

H.LINE OFF

G CUTOFF

G CUTOFF

B CUTOFF

EXIT BY

EXIT

EXIT

3

B CUTOFF

6

B CUTOFF

9

BRIGHT

R CUTOFF
G CUTOFF
B CUT OFF

SCREEN VR

IT

1. Receive a black and whit e signal (c olor off).

2. Select t he LOW LIGHT mode from the SERVIC E MENU.

3. Confirm the Initial setting value of BRIGHT, R CUTOFF, G
CUTOFF and B CUTOFF.

4. Display a single horizontal line by pressing t he ①①①① key of the

remote c ontrol unit.

5. Turn the screen VR all the way to the left.

6. Turn the screen VR gradually to the right fr om the left until
either one of the red, blue or green c olors appears faintly.

7. Adjust the two colors which did not appear until the single
horizontal line that is displayed becomes white using the ④④④④ to
⑨⑨⑨⑨ keys of the remote control unit.

8. Turn the screen VR to where the single horizontal line glows
faintly.

9. Press the ②②②② key to return to the regular screen.

Initial setting value

No. Setting item

AV-21D13

/PH

AV-21D33/PH

AV-20N13

/PH

AV-20N33/PH

2BRIGHT 064 060

1R CUTOFF 020 020

2G CUTOFF 020 020

3B CUTOFF 020 020

WHITE
BALANCE
(High Light)
adjustment

Signal
generator
Remote
control unit

[HIGH LIGHT] MODE

G DRIVE

B DRIVE

HIGH LIGHT

***

******

***

******

******

EXIT BY

EXIT

G DRIVE
B DRIVE

IT

1. Receive a black and whit e signal (c olor off).

2. Select the HIGH LIGHT mode in the SERVICE MENU.

3. Confirm the initial s etting value of G DRIVE and B DRIVE.

4. Adjust the screen color to white with the⑤⑤⑤⑤, ⑥⑥⑥⑥, ⑧⑧⑧⑧ and ⑨⑨⑨⑨

keys of the remote control unit.

Remote Control Unit

H.LINE ON

H.LINE OFF

1 2

G DRIVE

4 5

G DRIVE

7 8

EXIT

3

B DRIVE

6

B DRIVE

9

Initial setting value

No. Setting item

AV-21D13
AV-21D33

/PH

/PH

AV-20N13
AV-20N33

/PH

/PH

1 G DRIVE 128 128

2B DRIVE 128 128

24

No.52022

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

Item

SUB BRIGHT
adjustment

Measurin g

instrument

Remote
control unit

Test point Adjustment item Description

No.2 BRIGHT 1. Receive a broadcast.

Initial setting value

No. Setting item

AV-21D13

/PH

AV-21D33/PH

AV-20N13
AV-20N33/PH

2BRIGHT 064 064

SUB
CONTRAST

Remote
control unit

No.1 PICTURE 1. R eceive a broadc ast.

adjustment

Initial setting value

No. Setting item

AV-21D13
AV-21D33

/PH

/PH

1PICTURE 064 070

SUB COLOR
Adju stment

Remote
control unit

[ⅠⅠⅠⅠ]

AV-20N13
AV-20N33

/PH

/PH

/PH

2. Select No.2 BRIGHT of the PICTURE mode in SERVICE
MENU.

3. Confirm the initial s etting value of the No.2 BRIGHT.

4. If the brightness is not the best with the initial setting value,
make fine adjustment of the No.2 BRIGHT until you get the
optimum brightness.

2. Select No.1 PICTURE of the PICTURE mode in SERVICE
MENU.

3. Confirm the initial s etting value of the No.1 PICTURE.

4. If the contrast is not the best with the initial setting value, make
fine adjustment of the No.1 PICTURE until you get the
optimum contrast.

[PAL-M]No.3 COL. PALM

1. Receive a PAL-M broadcast.

2. Select No.3 COL. PALM of the PICTURE mode in SERVICE
MENU.

3. Confirm the initial s etting value of the No.3 COL. PALM.

4. If the color is not the best with the initial s etting value, make
fine adjustment until you get the best color.

Initial setting value

No. Setting item

COL.PALM 070 070

3

COL.PALN 070 070

4

COL.NTSC

5

AV-21D13
AV-21D33

/PH

/PH

072 072

AV-20N13
AV-20N33

No.5 COL. NTSC

SUB TINT
adjustment

Remote
control unit

No. 6 TINT 1. Receive a NTSC color bar signal.

[ⅠⅠⅠⅠ]

No.

Setting item

Initial setting value

AV-21D13
AV-21D33

/PH

/PH

AV-20N13
AV-20N33

6TINT 068 065

/PH

/PH

/PH

/PH

[PAL-N]No.4 COL. PALN

1. Receive a PAL-N broadc ast.

2. Select No.4 COL. PALN of the PICTURE mode in SERVICE
MENU.

3. Confirm the initial s etting value of the No.4 COL. PALN.

4. If the color is not the best with the initial s etting value, make
fine adjustment until you get the best color.

[NTSC]

1. Receive a NTSC broadcast.

2. Select No.5 COL. NTSC of the PICTURE mode in SERVICE
MENU.

3. Confirm the initial s etting value of the No.5 COL. NTSC.

4. If the color is not the best with the initial s etting value, make
fine adjustment until you get the best color.

2. Select No. 6 TINT of the PICTURE mode in SERVECE MENU.

3. Confirm the initial s etting value of the No. 6 TINT.

4. If the tint is not the best with the initial setting value, make fine
adjustment until you get the best tint.

No.52022

25

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

Item

Adju stment
of SUB
COLOR-ⅡⅡⅡⅡ

W

Y

Cy

Measurin g

instrument

" Signal

generator

" Oscillo-

scope

" Remote

control
unit

G

R

Mg

Test point Adjustment item Description

TP-47B
TP-E(####)
[ CRT
SOCKET

PWB ]

( )
0V

(+)

(A)

3. COL. PALM

[Method of adjustment using measuring instrument]

(PAL-M COLOR)

1. Receive a PAL-M full field color bar signal (75% white).

2. Select the sub menu screen PICT URE from the SERVICE
MENU.

3. Select 3. COL. PALM with the MENU / key , and confirm
its initial setting value.

4. Connect the oscillosc ope between TP-47B and TP-E.

5. Adjust 3. COL. PALM to set the value (A) in the figure to +3V

(W & B), with the MENU －/＋ key.

(PAL-N COLOR)4. COL. PALM

1. Receive a PAL-N full field color bar signal (75% white).

2. In the sub menu screen PICTURE, select 4. COL. PALN with
the MENU / key, and c onfirm its initial setting value.

3. Connect the oscillosc ope between TP-47B and TP-E.

4. Adjust 4. COL. PALN to set the value (A) in the figure to

+11V(W & B), with the MENU －/＋ key.

B

5. COL. NTSC

(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 / key, and c onfirm its initial setting value.

3. Connect the oscillosc ope between TP-47B and TP-E.

4. Adjust 5. COL. NTSC to set the value (A) in the figure to the
voltage shown in the table bellow with the MENU －/＋ key

of
SUB TINT-ⅡⅡⅡⅡ

W

Y

Cy

" Signal

generator

" Oscillo-

scope

Remote
control
unit

G

Mg

R

B

TP-47B
TP-E(####)

[ CRT
SOCKET

PWB ]

( )
0V

(+)

(B)

W-B

Models

AV-21D13
AV-21D33

AV-20N13
AV-20N33

[Method of adjustment using measuring instrument]Adju stment

6.TINT 1. Receive a NTSC 3.58 c olor bar signal (full field color bar

75%white).

2. Select the sub menu screen PICT URE from the SERVICE
MENU.

3. Select 6. TINT with the MENU / key, and confirm its initial
setting value.

4. Connect the oscillosc ope betweenTP-47B and TP-E.

5. Adjust 6. TINT to set the value (B) in the figur e to the voltage
shown in the table bellow with the MENU －/＋ key.

W- Mg

Models

AV-21D13
AV-21D33

AV-20N13
AV-20N33

/PH
/PH

/PH
/PH

/PH
/PH

/PH
/PH

Voltage

+15V

+13V

Voltage

+6V

+8V

26

No.52022

A

A

A

A

VIDEO STATUS ADJUSTMENT ( Do not adjust. Each value should be set to the initial value. )

V-21D13
V-21D33
V-20N13
V-20N33

Item

Measurin g

instrument

Setting
of

Remote

control unit
VIDEO
STAT US

SUB MENU : VIDEO STATUS

GAME

TINT G DRIVE
COLOR B DRIVE
PICTURE R CUT.
BRIGHT G CUT.
DETAIL B CUT.

SELECT BY
OPERATE BY

Test point Adjustment item Description

***

*** ***

******

***

*** ***

******

***

*** ***

******

***

*** ***

******

***

*** ***

******

EXIT BY

EXIT

***

******
***

******
***

******
***

******
***

******

TINT
COLOR
PICTURE
BRIGHT
DETAIL
G DRIVE
B DRIVE
R CUT.
G CUT.

1. Select the sub menu screen VIDEO STATUS-CINEMA from
the SERVICE MENU.

2. Select TINT ～ B CUT. with the MENU / key, and reset
each value to the initial setting value with the MENU －/＋

key.

3. Press the VIDEO STATUS key on the remote control unit to
select VIDEO STATUS-GAME. (Each time you press the
VIDEO ST ATUS key, CINEMA and GAME alternates.)

4. Make similar settings as in 2 above.

B CUT.

No. Setting item

1TINT

2 COLOR

3PICTURE

IT

4BRIGHT

5DETAIL

6 G DRIVE

7B DRIVE

8R CUT.

9G CUT.

10 B CUT

Variable

Range

CINEMA

±20 (±0) (±0)

±20

-30～+20

-3 -3

-10 -10

±20 (±0) (±0)

±15 (±0) (±0)

-99～+50

-99～+50

-22 -5

-54

±10 (±0) (±0)

±10 (±0) (±0)

±10 (±0) (±0)

GAME

(±0)

No.52022

27

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

MTS CIRCUIT ADJUSTMENT

[ AV-21D33

/PH

& AV-20N33

/PH

Only ]

Item

INPUT
LEVEL
check

STEREO VCO
adjustment

No. Setting item

2IN LEVEL 020 020

3FH MON 000 000

4ST VCO 025 025

SAP
VCO
adjustment

No. Setting item

95FH MON. 000 000

10 SAP VCO. 026 026

6FILTER 030 030

7 LOW SEP. 022 022

8 HI SEP. 063 063

Measurin g

instrument

Signal
generator

Frequency
counter

Signal
generator

Frequency
counter

Test point Adjustment part Description

R OUT
[AUDIO OUT]

Initial setting value

AV-21D13
AV-21D33/PH

MPX
Connector
4 pin SDA

3 pin GND
[MAIN PWB]
R OUT
[AUDIO OUT]

Initial setting value

AV-21D13
AV-21D33

No.2 IN LEVEL 1. Select the No.2 IN LEVEL of the SOUND mode in SERVICE

MENU.

2. Verify that the No.2 IN LEVEL is set at its initial setting value.

No.3 FH MON

No.4 ST VCO

/PH

AV-20N13/PH
AV-20N33/PH

No.9 5FH MON.

No.10 SAP VCO.

/PH

AV-20N13

/PH

AV-20N33

/PH

/PH

1. Receive a NTSC RF signal (non modulated sound signal) fr om
the antenna terminal.

2. Select the No.3 FH MON of SOUND mode in SERVICE
MENU, change the setting value from 0 to 1.

3. Connect the frequency connector to R OUT RCA pin of the
AUDIO OUT

4. Select the No.4 ST VCO.

5. Confirm the initial setting value of the No.4 ST VCO.

6. Adjust the No.4 ST VCO so that the frequenc y counter will
display 15.73kHz±0.1kH z.

7. Select the No.3 FH MON of the SOUND mode, and reset the
setting value from 1 to 0.

1. Receive a NTSC RF signal (non modulated sound signal) fr om
the antenna terminal.

2. Connect between pin 4 of MPX connector and GND (pin
3 of MPX connector) through 1MΩ resistor.

3. Select the No.9 5FH MON. of the SOUND mode in SERVICE
MENU, and reset the setting value from 0 to 1.

4. Connect the frequency connector to R OUT RCA pin of the
AUDIO OUT.

5. Select the No.10 SAP VCO.

6. Confirm the initial setting value of No.10 SAP VCO.

7. Adjust the No.10 SAP VCO so that the frequency c onnector
will display 78.67kHz±0.5kHz.

8. Select the No.9 5FH MON. of the SOUND mode, and reset the
setting value from 1 to 0.

FILTER
check

SEPARATION
adjustment

L-Channel
signal waveform

1 cycle

28

TV audio
multiplex
signal
generator

Oscilloscope

L OUT
R OUT
[AUDIO OUT]

R-Channel
crosstalk portion

Minimum

No.6 FILTER 1. Select the No.6 FILTER of the SOUND mode in SERVICE

MENU.

2. Verify that the No.6 FILTER is s et at its initial s etting value.

No.7 LOW SEP.

No.8 HI SEP.

1. Input a stereo L signal (300Hz) from the TV Audio multiplex
signal generator to the antenna terminal. (NTSC)

2. Connect an oscilloscope to L OUT RCA pin of the AUDIO
OUT, and display one c ycle portion of the 300Hz signal.

3. Change the connection of the oscilloscope to R OUT RCA pin
of the AUDIO OUT, and enlarge the voltage axis.

4. Select the No.7 LOW SEP. of the SOUND mode in SERVICE
MENU.

5. Confirm the initial setting value of the No.7 LOW SEP.

6. Adjust the No.7 LOW SEP. so that the stroke element of the
300Hz signal will become minimum.

7. Change the signal to 3kHz, and similarly adjust the “No.8 HI
SEP.

No.52022

A

A

A

A

PURITY / CONVERGENCE ADJUSTMENT

PURITY ADJUSTMENT

1. Demagnetize CRT with the demagnetizer.

V-21D13
V-21D33
V-20N13
V-20N33

2. Loosen the retainer screw of the deflection yoke.

3. Remove the wedges.

4. Input 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 so that the whole screen will become green.

9. Insert the wedge to the top side of the deflection yoke s o that it
will not move.

WEDGE

CRT

# P/C MAGNETS

P : PURITY MAGNET
4 : 4 POLES
6 : 6 POLES

(convergence magnets)
(convergence magnets)

Fig.1

PURITY MAGNETS

DEFLECTION

YOKE

P

46

P / C

MAGNE TS

10. Input a crosshatch signal.

11. Verify that the scr een is horizontal.

12. Input red and blue raster signals, and make sure that purity is
properly adjusted.

Long lug

Short lug

(FRONT VIEW )

Bring the long lug over the short lug
and position them horizontally.

Fig.2

GREEN RASTER

CENTER

Fig.3

No.52022

29

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

STATIC CONVERGENCE ADJUSTMENT

1. Input a crosshatch signal.

2. Using 4-pole convergence magnets, overlap the red and blue
lines in the center of the screen (Fig.1) and turn them to
magenta (red/blue).

3. Using 6-pole convergence magnets, overlap the
magenta(red/blue) and green lines in the center of the screen
and turn them to white.

4. Repeat 2 and 3 above, and make best convergence.

DYNAMIC CONVERGENCE ADJUSTMENT

1. Move the deflection yok e up and down and overlap the lines in
the periphery. (Fig. 2)

2. Move the deflection yok e left to right and overlap the lines in the
periphery. (Fig. 3)

3. Repeat 1 and 2 above, and make best convergence.

(FRONT VIEW )

(FRONT VIEW )

BLUE

GREEN

RED

RED

Fig.1

GREEN

BLUE

RED

GREEN

BLUE

●

After adjustment, fix the wedge at the original position.

Fast en the retainer screw of the deflection yoke.
Fix the 6 magnets with glue.

(FRONT VIEW )

GREEN

RED

BLUE

BLUE

GREEN RED

Fig.2

Fig.3

BLUE

GREEN

RED

RED
GREEN
BLUE

BLUE

GREEN

RED

30

No.52022

A

A

A

A

HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT

1. HIGH VOLTAGE HOLD DOWN CIRCUIT

After repairing the high voltage hold down circ uit shown in Fig. 1.
This circuit shall be checked to operate correctly.

2. CHECKING OF THE HIGH VOLTAGE HOLD DOWN CIRCUIT

(1) Turn the POWER SW ON.
(2) As shown in Fig.2, set the resistor (between X connector 1 & 3 ).
(3) Make sure that the screen picture disappears.
(4) Temporarily unplug the power cord.
(5) Remove the resistor (between X connector 1 & 3 ).
(6) Again plug the power c ord, make sur e that the normal picture is displayed on the screen.

B1

Q52

2

Q94

2

Q941

H-Vcc

IC201

3

H-OUT

4

T521

V-21D13
V-21D33
V-20N13
V-20N33

T522

HVT

10

IC701

27 28

Q511

D510

3 2 1

R562

D562

R563

Fig. 1

RESISTOR

RESISTOR

RESISTORRESISTOR

17.2kΩ±1% 1/4W

17.2kΩ±1% 1/4W

17.2kΩ±1% 1/4W17.2kΩ±1% 1/4W

3 2 1 X

Q521

Fig.2

X

FR561

4

D561

C561

HEATER

CONNECTOR

R562

D562

R563

Fig. 2

No.52022

C561

FR561

D561

31

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

SELF CHECK FUNCTIONS

1. Outline

This model includes protector functions f or Over-current, X-ray and CRT NECK which cutoff the sub-pow er in the event of a malfunction and
inform of the malfunction by flashing ON TIMER LED.
The malfunction is detected according to the state of the control line input connected to the main CPU.

2. Self check items

Check item Detected contents Detection method Abnormality state

Over-current protector An over-current on the B1 line

and Audio-Vcc line is detected.

[ AV-21D13/PH & AV-20N13/PH ]

An over-current on the B1 line is
detected.

[ AV-21D33/PH & AV-20N33/PH ]

X-ray protector Operation of X-ray protection

circuit

CRT NECK protector W hen the vertical circuit S-

correction capacitor C413 is
shorted, detect the potential
drop of the C413, and prevent
the burn damage to the CRT
NECK.

The main CPU detects at
1 second intervals.

If NG is detected f or more than
1 ms, a malfunction is interpreted.

The main CPU detects at
1 second intervals.

If NG is detected f or more than
1 ms, a malfunction is interpreted.

The main CPU detects at
1 second intervals.

If NG is detected f or more than
1 ms, a malfunction is interpreted.

During an abnormality the sub­power is cutoff. The remote
controller power key operation is
not recognized and sub-power
off is maintained until the power
cord is unplugged and
reinserted.

During an abnormality the sub­power is cutoff. The remote
controller power key operation is
not recognized and sub-power
off is maintained until the power
cord is unplugged and
reinserted.

During an abnormality the sub­power is cutoff. The remote
controller power key operation is
not recognized and sub-power
off is maintained until the power
cord is unplugged and
reinserted.

3. Self check indicating function

The self check function begins detection about 5
seconds aft er power is supplied.
In the event a malfunction is detected, the sub-power is
cutoff immediately.
At this time, the ON TIMER LED flashes to inform of
the malfunction.

Item LED ON / OFF intervals Priority of detection

OCP/X-ray every 0.5-second 1

NECK every 1.0-second 2

32

POWER
supplied

No.52022

About 5 seconds
after

Detection

start

Malfuction is
detected

SUB-POWER OFF

Flashing
ON TIMER LED

A

A

A

A

REPLACEMENT OF CHIP COMPONENT

! CAUTIONS

1. Avoid heating f or more than 3 s econds.

2. Do not rub the electrodes and the resist parts of the pattern.

3. When removing a chip part, melt the solder adequately.

4. Do not reuse a chip part after removing it.

! SOLDERING IRON

1. Use a high insulation soldering iron with a thin pointed end of it.

2. A 30w s oldering iron is recommended for easily removing parts.

! REPLACEMENT STEPS

1.

How to remove Chip parts

$ Resistors, capacitors, etc.

(1) As shown in the figure, push the part with tweezers and

alternately melt the solder at each end.

V-21D13
V-21D33
V-20N13
V-20N33

2. How to install Chip parts

$ Resistors, capacitors, etc.
(1) Apply solder to the pattern as indicated in the figure.

(2) Shift with tweezers and remove the chip part.

$ Transistors, diodes, variable resistors, etc.
(1) Apply extra s older to each lead.

SOLDER

(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.

SOLDER

(2) Grasp the chip part with tweezers and place it on the

solder. Then heat and melt the solder at both ends of the
chip part.

$ Transistors, diodes, variable resistors, etc.
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the

solder.

(3) First solder lead

(4) Then solder leads

as indicated in the figure.

A

A

B

C

and C.

B

A

B

Note

: After removing the part, remove remaining solder from

the pattern.

No.52022

C

33

A

V-21D13

A

A

A

V-21D33
V-20N13
V-20N33

34

No.52022