JVC AV-21YN14/P, AV-21YT14/P Service Manual

YA143200412

SERVICE MANUAL

FLAT COLOR TELEVISION

AV-21YN14/P,
AV-21YT14

[AV-21YT14/P][AV-21YN14/P]

/P

BASIC CHASSIS

CW

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

COPYRIGHT © 2004 Victor Company of Japan, Limited

No.YA143

2004/12

SPECIFICATION

Items

Dimensions (W × H × D) 64.9cm × 47.05cm × 47.75cm

Mass 21kg

TV RF System M

Color System TV Mode

Video Mode

Stereo System Mono MTS (Multi-Channel Television Sound)

Receiving Frequency VHF Low

VHF High

Intermediate
Frequency

Color Sub Carrier Frequency 4.43MHz (PAL), 4.40MHz/4.25MHz (SECAM), 3.58MHz/4.43MHz (NTSC)

Aerial Input Terminal 75Ω unbalanced, coaxial

Power Input AC110V-AC240V, 50Hz / 60Hz (Operating Voltage AC90V ~ AC260V)

Power Consumption 81W (Max.) / 57W (Avg.) 91W (Max.) / 65W (Avg.)

Picture Tube A51LZM10X

Screen Size Visible size :51.0cm (Diagonal) / 42.0cm × 31.85cm (H × V)

High Voltage 26kV ± 1.5kV (at zero beam current)

Speaker 6cm × 12cm, Oval type × 2

Audio Output 3W 3W + 3W

Video / Audio Input
[1/2]

Video / Audio Output Video 1V(p-p), 75Ω, RCA pin jack × 1

Headphone 3.5mm stereo mini jack × 1

Remote Control Unit RM-C1262-2H

Video [1/2] 1V(p-p), negative sync, 75Ω, RCA pin jack × 2

Audio [1/2] 500mV(rms)(-4dBs ),

NTSC3.58
PAL / SECAM / NTSC3.58 / NTSC4.43

46.25MHz ~ 168.25MHz (AU0 ~ S10)

175.25MHz ~ 463.25MHz (E5 ~ S41)

UHF

471.25MHz ~ 863.25MHz (E21 ~ CHINA 57)

CATV

Mid : X ~ Z, S1 ~ S10
Super: S11 ~ S20
Hyper: S21 ~ S41

VIF 38.0MHz

SIF 33.5MHz (4.5MHz)

21-inch, aspect ratio 4:3, conventional square face type, tinted

high impedance, RCA pin jack × 2

Audio 500mV(rms)(-4dBs), Low impedance (400Hz

when modulated 100%), RCA pin jack × 1

(AA/R06/UM-3 battery × 2)

AV-21YN14/P AV-21YT14/P

Contents

500mV(rms)(-4dBs),

high impedance, RCA pin jack × 4

500mV(rms)(-4dBs), Low impedance (400Hz

when modulated 100%), RCA pin jack × 2

RM-C1282-2H

(AA/R06/UM-3 battery × 2)

Design & specifications are subject to change without notice.

1-2 (No.YA143)

SECTION 1

PRECAUTION

1.1 SAFETY PRECAUTIONS

(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 identical 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 therefrom.

(3) Many electrical 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 substitute replacement which does

not have the same 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 difference 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
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). 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 B1 POWER SUPPLY check).

(6) The high voltage applied to the picture tube must conform

with that specified in Service manual. Excessive high
voltage can cause an increase 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 determine
the cause by visual inspection (incorrect installation,
cracked 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 manufacturer 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 required, observe the original lead dress.

Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.

(9) Isolation Check (Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/audio input and output terminals,
Control knobs, metal cabinet, screw heads, earphone jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.

a) Dielectric Strength Test

The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis 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
appliance 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 service trade.

b) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not use
a line isolation transformer during this check.). Using a
"Leakage Current Tester", 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 current must not exceed 0.5mA AC (r.m.s.).
However, in tropical 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 voltmeter having 1000Ω per volt or more
sensitivity in the following manner. Connect a 1500Ω
10W resistor paralleled by a 0.15µF AC-type capacitor

between an exposed 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
resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Any voltage measured must
not exceed 0.75V AC (r.m.s.). This corresponds to

0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.). This corresponds to 0.2mA AC (r.m.s.).

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

0.15 F AC-TYPE

PLACE THIS PROBE

1500 10W

GOOD EARTH GROUND

ON EACH EXPOSED
ME TAL PAR T

(No.YA143)1-3

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

• New chassis design enables use of an interactive on-screen control.

• Pure flat CRT produces fine textured picture in every detail.

• Wide range voltage (110V ~ 240V) for AC power input.

• With AUDIO/VIDEO input terminals.

2

C bus control utilizes single chip ICs.

•I

• By means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged
automatically.

• Built-in OFF TIMER & RETURN +.

2.2 MAIN DIFFERENCE LIST

Items AV-21YN14/P AV-21YT14/P

STEREO SYSTEM Mono MTS (Multi-Channel Television Sound)

AUDIO OUTPUT 3W 3W + 3W

POWER CONSUMPTION 81W (Max.) / 57W (Avg.) 91W (Max.) / 65W (Avg.)

1-4 (No.YA143)

2.3 FUNCTIONS

 REMOTE CONTROL UNIT

RM-C1262-2H [AV-21YN14/P]

10

1

11

2

3

4

5

6

7
8

9

12

13

14

15

16

17

PICTURE BOOSTER key

1

COLOR SYSTEM key

2

FAVORITE CHANNEL keys

3

4

TV / VIDEO key

5

PICTURE MODE key

6

CLOSED CAPTION key

7

OFF TIMER key

8

RETURN + key

9

DISPLAY / BACK key

10

CHANNEL (-/+) keys

11

POWER key

Number keys

12

13

100+ key

14

MENU/OK key

15

MENU (

16

MUTING key
VOLUME (-/+) keys

17

/

,

/

) keys

RM-C1282-2H [AV-21YT14/P]

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15
16

17

18

19

20

21

COLOR SYSTEM key

1

FAVORITE CHANNEL keys

2

DISPLAY BACK key

3

MENU ( / , / ) keys

4

CLOSED CAPTION key

5

SOUND TURBO key

6

7

PICTURE MODE key

8

RETURN + key

9

OFF TIMER key

CHANNEL (-/+) keys

10

PICTURE BOOSTER key

11

ECO key

12

POWER key

13

14

TV / VIDEO key

MENU (OK) key

15

16

MUTING key

17

Number keys

18

100+ key

VOLUME (-/+) keys

19

20

Not used

21

CINEMA SURROUND key

(No.YA143)1-5

 FRONT PANEL CONTROLS

[AV-21YN14/P]

[AV-21YT14/P]

AUDIO

VIDEO

IN (VIDEO-2)

1

1

2

3

4

5

6

3

2

HEADPHONE jack

IN (VIDEO-2) : VIDEO

IN (VIDEO-2) : AUDIO

MENU (OK) button

CHANNEL (-/+) buttons

VOLUME (-/+) buttons

MENU

OK

4

POWER

TIMER

5

6

7

7

Remote control sensor

8

TIMER lamp

9

POWER lamp

10

MAIN POWER button

9

8

10

V L/MONO
IN (VIDEO-2)

1

2

HEADPHONE jack

1

IN (VIDEO-2) : VIDEO

2

IN (VIDEO-2) : AUDIO L/MONO

3

4

IN (VIDEO-2) : AUDIO R

5

MENU (OK) button

CHANNEL (-/+) buttons

6

R

3

4

MENU

OK

5

POWER

TIMER

6

7

8

7

VOLUME (-/+) buttons

8

Remote control sensor

9

TIMER lamp

10

POWER lamp

11

MAIN POWER button

9

10

11

1-6 (No.YA143)

 REAR TERMINAL
[AV-21YN14/P]

VIDEO-1 INPUT TERMINAL

[AV-21YT14/P]

VIDEO-1

OUTPUT

INPUT

VIDEO

AUDIO

1 2 3 4

VIDEO

1

AUDIO

2

OUTPUT TERMINAL

3

AUDIO

4

VIDEO

Aerial input terminal

5

7

1

2

VIDEO-1

INPUT

V

L

/

MONO

R

3

4 5

OUTPUT

V

L

R

6

VIDEO-1 INPUT TERMINAL

VIDEO

1

AUDIO L/MONO

2

AUDIO R

3

OUTPUT TERMINAL

VIDEO

4

AUDIO L

5

AUDIO R

6

9

Aerial input terminal

7

(No.YA143)1-7

2.4 MAIN CPU [MAIN PWB : IC701] PIN FUNCTION

Pin no. Pin name I/O Remark

1 VssP2 - GND

2 VssC4 - GND

3 V1.8C4 I 1.8V (Digital)

4 V3.3A3 I 3.3V

5 VrefP_Sdac I 3.3V (Positive)

6 VrefN_Sdac - GND

7 VrefP_Sdac I 3.3V (Negative)

8 VrefN_Sdac - GND

9 VrefP_Sdac I 3.3V (Positive)

10 XtalIn I 24.567MHz for system clock

11 XtalOut O 24.567MHz for system clock

12 VssA1 - GND

13 NECK I V-guard input/ I/O switch

14 CONT I 1.8V regulator control

15 V5P1 I +5V

16 Ph2 - Phase-2 filter

17 Ph1 - Phase-1 filter

18 Gnd1 - GND

19 SecPll - SECAM PLL decoupling

20 Dec8G - Bandgap decoupling

21 EW O East-West drive output

22 VDRB- O Vertical drive B output

23 VDRA+ O Vertical drive A output

24 Vif1 I Video IF input 1

25 Vif2 I Video IF input 2

26 Vsc - Vertical sawtooth capacitor

27 Iref I Reference current input

28 GndIF - GND

29 Sif1 I Sound IF input 1

30 Sif2 I Sound IF input 2

31 AGC O Tuner AGC output

32 EHT I EHT/overvoltage protection input

33 Ssif/RefIn/Avl/RefOut O

34 L3 I Audio-L3 input (left signal)

35 R3 I Audio-R3 input (right signal)

36 L_OUT O Audio L output

37 R_OUT O Audio R output

38 DecsDem - Decoupling sound demodulator

39 QssO/AmO/AudeEm O QSS intercarrier output / AM output /

40 Gnd2 - GND

41 PllIf - IF-PLL loop filter

42 SifAgc - AGC sound IF

43 IfVo/FmRo/DvbO O Not used

44 NC O Not used

45 V8AudioSwitches I 8V

46 AgcSsif - AGC capacitor second sound IF

47 V5P2 I 5V

48 V_OUT O Video output

49 L1 I Audio-L1 input

50 R1 I Audio-R1 input

51 V3 I Video V3 input

52 C4 I Not used

53 Audio2InL I Not used

54 Audio2InR I Not used

55 V2/Y I Video 2 input

56 L2 I Audio L2 input (Left signal)

57 R2 I Audio R2 input (right signal)

58 Y3/Cvbs I S-Video Y1 input

59 C1 I S-Video C1 input

60 AudioLsL O Audio L output for audio power amplifier

61 AudioLsR O Audio R output for audio power amplifier

62 HP_L O Headphone L

63 HP_R O Headphone R

Automatic Volume Levelling/ sound IF input /
subcarrier reference output / external reference
signal input for I signal mixer for DVB operation

deemphasis / (front-end audio out)

Pin no. Pin name I/O Remark

64 CVBSO/PIP O CVBS / PIP output

65 SVM O Scan velocity modulation output

66 FbiSo I Flyback input/sandcastle output

67 Hout O Horizontal output

68 VssComb - GND

69 V5Comb I 5V

70 Vin/R2/Pr I PIP R input

71 Uin/B2/Pb I PIP B input

72 Yin/G2/Y I PIP G input

73 Ysync I Not used

74 Yout O Not used

75 Uout/INSSW2 I YUV insertion input

76 NC O Not used

77 INSSW3 I YUV insertion input

78 R3/Pr I Component PR input (Video-2)

79 G3/Y I Component Y input (Video-2)

80 B3/Pb I Component PB input (Video-2)

81 Gnd3 - GND

82 V5P3 I 5V

83 BCL I Beam current limiter input

84 BLKIN I Black current input

85 Rout O R output

86 Gout O G output

87 Bout O B output

88 V3.3A1 I 3.3V

89 RefAdN - GND

90 V3.3RefAdP I 3.3V (Positive)

91 RefAd I 3.3/2V

92 GndA - GND

93 V1.8A I 1.8V

94 V3.3A2 I 3.3V

95 VssADC - GND

96 V1.8ADC I 1.8V

97 REMOTE I Remote control

98 PW_LED I POWER LED control

99 P11/TO I POWER LED control

100 V1.8C2 I 1.8V

101 VssC2 - GND

102 COMPONENT-PIP - Not used

103

COMB_SW_NT3.5/OTHER

104 VER_PROTECT O X-ray protect

105 S_REDUCE O Sound control

106 P00/I2SDI1 O Not used

107 POWER O SUB POWER control

108 SCL1 I I2C bus clock

109 SDA1 I/O I2C bus clock

110 V3.3P I 3.3V

111 ROTATION O ROTATION

112 3.58/OTHER O

113 A_MUTE O Audio muting

114 4.5/OTHER O NTSC 4.43 detection

115 PROT I Protect

116 ECO_IN I ECO sensor level detection

117 V1.8C1 I 1.8V (Digital)

118 DecV1V8 I 1.8V

119 KEY_IN I Key scan data

120 VDO_DET I Video DET input

121 VSSC1+P1 - Digital GND

122 P24/PWM3 I S-Video DET input

123 P25/PWM4 O GTVA_reset

124 V1.8C3 I 1.8V (Digital)

125 VssC3 - GND

126 P12/Int2 I External interrupt

127 SDA0 I/O I2C bus data (for memory)

128 SCL0 I I2C bus clock (for memory)

- Not used

NTSC 3.58 detection

1-8 (No.YA143)

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

3.1.1 REMOVING THE REAR COVER

• Unplug the power cord.
(1) Remove the 9 screws [A] and 2 screws [B] as shown in

Fig.1.

(2) Withdraw the REAR COVER toward you.

CAUTION:

When reinstalling the rear cover, carefully push it inward after
inserting the MAIN PWB into the REAR COVER groove.

3.1.2 REMOVING THE MAIN PW BOARD

• Remove the REAR COVER.
(1) Slightly raise the both sides of the MAIN PWB by hand.
(2) Withdraw the MAIN PWB backward.

(If necessary, take off the wire clamp and connectors, etc.)

3.1.3 REMOVING THE SPEAKER

• Remove the REAR COVER.
(1) Remove the 4 screws [C] as shown in Fig.1.

3.1.4 CHECKING THE MAIN PW BOARD

• To check the back side of the MAIN PWB.
(1) Pull out the MAIN PWB. (Refer to REMOVING THE MAIN

PW BOARD).

(2) Erect the MAIN PWB vertically so that you can easily check

its back side.

CAUTIONS:

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

and other connectors are properly connected.

• When repairing, connect the DEG. COIL to the DEG.

connector on the MAIN PWB.

• When repairing, connect the DEG. COIL to the DEG.

connector on the MAIN PWB.

3.1.5 WIRE CLAMPING AND CABLE TYING

(1) Be sure to clamp the wire.
(2) Never remove the cable tie used for tying the wires

together.
Should it be inadvertently removed, be sure to tie the wires
with a new cable tie.

(No.YA143)1-9

SPEAKER

PICTURE TUBE

FRONT CABINET

C

(x4)

SPEAKER

MAIN PWB
(CRT SOCKET PWB)

FBT

[AV-21YT14/P]

C

(x4)

MAIN PWB

REAR COVER

FRONT CABINET

(x9)

A

B

(x2)

1-10 (No.YA143)

Fig.1

3.2 REPLACEMENT OF MEMORY IC

3.2.1 MEMORY IC

This TV uses the following memory IC.

Memory IC: IC702 on MAIN PWB

The memory IC memorizes data for correctly operating the video
and deflection circuits. When replacing the memory IC, be sure
to use the same type IC written with the initial values of data. In
other words, use the specific IC listed in "PRINTED WIRING
BOARD PARTS LIST". For its mounting location, refer to
"ADJUSTMENT LOCATIONS".

3.2.2 PROCEDURE FOR REPLACING MEMORY IC

1. Power off

Switch the power off and unplug the power cord from the wall
outlet.

2. Replacing the memory IC

Replace the memory IC with new one. Be sure to use the
memory IC written with the initial data values.

3. Power on

Plug the power cord into the wall outlet and switch the power on.

4. Check and setting of SYSTEM CONSTANT SET:

(1) Press the [DISPLAY] key and the [PICTURE MODE] key

on the remote control unit simultaneously.
The SERVICE MENU screen will be displayed.(See
Fig.1.)

(2) In the SERVICE MENU, press the [DISPLAY] key and

[PICTURE MODE] key simultaneously. Then, the
SYSTEM CONSTANT SET screen will be
displayed.(See Fig.2.)

(3) Check whether the setting values of the SYSTEM

CONSTANT SET are the same as those indicated in
Table 1.
If the value is different, select the setting item with the
MENU [] / [] key, and set the correct value with the
MENU [] / [] key.

(4) Press the [DISPLAY] key twice to return to the normal

screen.

5. Receive channel setting

Refer to the OPERATING INSTRUCTIONS and set the
receive channels (channels preset).

6. User setting

Check the user setting values in Table 2 and Table 3. If setting
value is different, set the correct value.
For setting, refer to the OPERATING INSTRUCTIONS.

7. Setting of SERVICE MENU

Verify the setting for each setting item in the SERVICE
MENU.(See Table 4.) If readjustment is necessary, perform
adjustment referring to "ADJUSTMENTS PROCEDURE".

NAME OF REMOTE CONTROL KEYS

SERVICE MENU

SERVICE MENU

1. IF

3. AUDIO

5. VSM W/B

7. PLUG & PLAY (ON)

1-7 : SELECT DISPLAY : EXIT

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

2. V/C

4. DEF

6. S TATUS

Fig.1

SYSTEM CONSTANT-1

SYSTEM CONSTANT

SYSTEM OTHERS
COMB
TILT
SUPER BASS

: SEL  : OPE



SET 1

NO
NO
NO

DISP : EXIT

SYSTEM CONSTANT-2

SYSTEM CONSTANT SET 2

SOUND
BLUE BACK MUTE
ECO SENSOR

: SEL  : OPE



MONO
NO
NO

DISP : EXIT

SYSTEM CONSTANT-3

SYSTEM CONSTANT SET 3

SURROUND



: SEL  : OPE

NO

YESPICTURE BOOSTER

NOCOMPONENT
NOS INPUT

DISP : EXIT

Fig.2

DISPLAY / BACK

MENU

PICTURE
MODE

MENU

MENU

MENU

(No.YA143)1-11

3.2.3 FACTORY SETTING VALUE

 SETTING OF SYSTEM CONSTANT SET

Setting item Setting content

SYSTEM OTHERS

COMB NO

TILT NO

SUPER BASS

SOUND MONO

BLUE BACK MUTE NO

ECO SENSOR NO

SURROUND NO

PICTURE BOOSTER YES

COMPONENT NO

S INPUT NO

TAIWAN OTHERS

YES NO

YES NO

YES NO

STEREO PB MONO

YES NO

YES NO

YES NO

YES NO

YES NO

YES NO

AV-21YN14/P AV-21YT14/P

Setting

NO

Table 1

value

STEREO

YES

1-12 (No.YA143)

 SETTING OF BASIC FUNCTIONS

Setting item Setting value

POWER Off

SUB POWER On

VOLUME 15

COLOR SYSTEM NTSC

SOUND SYSTEM M

PICTURE MODE (VSM) BRIGHT

CINEMA SURROUND OFF [AV-21YT14/P]

OFF TIMER OFF

CLOSED CAPTION OFF

PICTURE BOOSTER OFF

CHANNEL POSITION CH02

Table 2

 SETTING OF MENU SCREEN

Setting item Setting value

INPUT TV

VNR AUTO

AUTO SHUTOFF OFF

CHILD LOCK OFF

BLUE BACK ON

AUTO PROGRAM

CHANNEL SUMMARY

WHITE BALANCE COOL

TINT Center

COLOR Center

BRIGHT Center

PICTURE Maximum

DETAIL Center

BALANCE Center [AV-21YT14/P]

SOUND MODE DYNAMIC [AV-21YT14/P]

SOUND TURBO OFF [AV-21YT14/P]

AI VOLUME ON

MTS STEREO [AV-21YT14/P]

FAVORITE CH RED CH02

FAVORITE CH GREEN CH03

FAVORITE CH YELLOW CH04

FAVORITE CH BLUE CH05

Refer to OPERATING INSTRUCTIONS

Refer to OPERATING INSTRUCTIONS

 SERVICE MENU SETTING ITEMS

Setting item Setting value

1. IF 1. VCO

2. DELAY POINT

2. V/C 1. SCREEN

2. CUTOFF(B/G)

3. WDR(R/G/B)

4. BRIGHT(TV/VDO 1/2)

5. CONT(TV/VDO 1/2)

6. COLOUR(TV/VDO1/2)

7. TINT(TV/VDO 1/2)

8. SHARP [Do not adjust]

9. Y DELAY [Do not adjust]

10. TINT DVD [Do not adjust]

11. AMP T. SHARP

3. AUDIO
[Do not adjust]

4. DEF 1. V-SHIFT

5. VSM W/B
(BRIGHT/STANDARD/SOFT)

(COOL/WARM/NORMAL)

6. STATUS
[Display only]

7. PLUG & PLAY(ON)
[Display only]

1. DCXO ADJ

2. NICAM lower ERRLIM

3. NICAM upper ERRLIM

4. A2 ID THR

5. MENU EQUALIZER

2. V-SLOPE

3. V-SIZE

4. H-CENT

5. H-SIZE

6. TRAPEZ

7. EW-PIN

8. COR-UP

9. COR-LO

10. ANGLE

11. BOW

12. V-S.CR

13. V-LIN

14. V-ZOOM

15. V-SCROLL

1. BRIGHT

2. CONT

3. COLOUR

4. SHARP

5. HUE

1. R DRIVE

2. G DRIVE

3. B DRIVE

Table 4

Table 3

(No.YA143)1-13

3.3 REPLACEMENT OF CHIP COMPONENT

3.3.1 CAUTIONS

(1) Avoid heating for more than 3 seconds.
(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.

3.3.2 SOLDERING IRON

(1) Use a high insulation soldering iron with a thin pointed end of it.
(2) A 30w soldering iron is recommended for easily removing parts.

3.3.3 REPLACEMENT STEPS

1. How to remove Chip parts

2. How to install Chip parts

[Resistors, capacitors, etc.]

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

alternately melt the solder at each end.

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

[Transistors, diodes, variable resistors, etc.]

(1) Apply extra solder to each lead.

SOLDER

SOLDER

[Resistors, capacitors, 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. 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 A as indicated in the figure.

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

alternately melt the solder at each lead. Shift and remove
the chip part.

NOTE :

After removing the part, remove remaining solder from the
pattern.

1-14 (No.YA143)

A

B

C

(4) Then solder leads B and C.

A

B

C

SECTION 4

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment

equipment and parts as given below.

(2) Adjustment with the remote control unit is made on the basis of the initial setting values, however, the new setting

values used for setting the screen to its optimum condition may differ from the initial settings.

(3) Make sure that AC power is turned on correctly.
(4) Turn on the power for the set and test 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 variable resistors, transformers, trimmer capacitors,

etc.

4.2 PRESETTING BEFORE ADJUSTMENT

Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.

 User mode setting position

Setting item Setting value

PICTURE MODE (VSM) BRIGHT

TINT, COLOR, BRIGHT,DETAIL Center

PICTURE Maximum

VNR OFF

BALANCE Center [AV-21YT14/P]

SOUND TURBO OFF [AV-21YT14/P]

CINEMA SURROUND OFF [AV-21YT14/P]

4.3 MEASURING INSTRUMENT AND FIXTURES

(1) DC voltmeter (or Digital voltmeter)
(2) Oscilloscope
(3) Signal generator (Pattern generator) [PAL/SECAM/NTSC]
(4) Remote control unit

4.4 ADJUSTMENT ITEMS

 B1 VOLTAGE
 FOCUS ADJUSTMENT
 IF CIRCUIT ADJUSTMENTS

• IF VCO adjustment

• DELAY POINT (AGC TAKE-OVER) adjustment
 VIDEO CIRCUIT ADJUSTMENTS

• WHITE BALANCE (Low light) adjustment

• WHITE BALANCE (High light) adjustment

• SUB BRIGHT adjustment

• SUB CONTRAST adjustment

• SUB COLOR 1 adjustment

• SUB COLOR 2 adjustment

• SUB TINT 1 adjustment

• SUB TINT 2 adjustment

 AUDIO SETTING

 DEFLECTION CIRCUIT ADJUSTMENTS

• V.SLOPE adjustment

• V.POSITION adjustment

• V.HEIGHT adjustment

• H.POSITION adjustment

• V.LINEARITY adjustment

• H. PARALLEL adjustment

• H.BOW adjustment

 VSM PRESET SETTING
 PURITY AND CONVERGENCE ADJUSTMENTS

• PURITY adjustment

• STATIC CONVERGENCE adjustment

• DYNAMIC CONVERGENCE adjustment

(No.YA143)1-15

4.5 ADJUSTMENT LOCATIONS

POWER
CORD

DEG COIL

MAIN PWB ASS'Y

POWER SW

S901

PW

DEG

S804 S802

S805 S803 S801

1

T

6

IC701

J804J801 J802 J803

J808

J807

IC702

CN00C

61

J809

J806

41

CN00S

U

41

B1

GND

5

X

FRONT

DEF

HV

14

HVT

1

YOKE

TU001

I2C

CN00C

1. 5V

2. SCLO

3. SDAO

4. SCL1

5. SDA1

6. GND

CN00X

1. B1

2. NC

3. X-RAY2

4. X-RAY1

5. GND

MAIN PWB ASS'Y (CRT SOCKET)

(SOLDER SIDE)

T

1

6

TP-47R

TP-47B

TP-47R/G

TP-E

E1

CRT EARTH

(BRAIDED ASS'Y)

UPPER : FOCUS

LOWER : SCREEN

TOP

U

41

1-16 (No.YA143)

4.6 BASIC OPERATION IN SERVICE MENU

Operate the SERVICE MENU with the remote control unit.

4.6.1 SERVICE MENU ITEMS

With the SERVICE MENU, various settings (adjustments) can be made, and they are broadly classified in the following items of settings:

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

2. V/C For entering/adjusting the setting values (adjustment values) of the VIDEO circuit.

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

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

5. VSM W/B For setting the values of STANDARD, SOFT, BRIGHT and COOL, NORMAL, WARM.

6. STATUS This is not used for service.

7. PLUG & PLAY (ON) This is not used for service.

4.6.2 BASIC OPERATION IN SERVICE MENU

1. HOW TO ENTER SERVICE MENU

Press the [DISPLAY] key and the [PICTURE MODE] key on the remote control unit simultaneously.
The SERVICE MENU screen will be displayed. (See Fig. 1 on the next page.)

2. SELECTION OF SUB MENU SCREEN

Press one of the keys 1 to 6 on the remote control unit, and select the SUB MENU SCREEN from the SERVICE MENU. (See Fig.1 on the next page.)

SERVICE MENU → SUB MENU

1. IF 5. VSM W/B

2. V/C 6. STATUS

3. AUDIO 7. PLUG & PLAY (ON)

4. DEF

3. METHOD OF SETTING

NOTES:

• Once the setting values are set, they are memorized automatically.

• It must not be adjusted without inputting a signal.

(1) 1. IF

[1.VCO ] : Under normal conditions, no adjustment is required.

(a) [1] key Select 1. IF.
(b) [1] key Select 1. VCO.
(c) [DISPLAY] key When this is pressed twice, you will return to the SERVICE MENU.

[2.DELAY POINT ]

(a) [1] key Select 1. IF.
(b) [2] key Select 2. DELAY POINT.
(c) MENU [] / [] key Adjust the setting value.
(d) [DISPLAY] key When this is pressed twice, you will return to the SERVICE MENU.

(2) 2. V/C, 3. AUDIO and 4. DEF

(a) [2] ~[4] keys Select one from 2. V/C, 3. AUDIO and 4. DEF
(b) MENU [] / [] key Select setting items.
(c) MENU [] / [] key Adjust the setting values of the setting items.

Use the number keys on the remote control unit for setting the WHITE BALANCE.
For the setting, refer to each item concerned.

(d) [DISPLAY] key When this is pressed, you will return to the SERVICE MENU.

(3) 5. VSM W/B

(a) [5] keys Select 5. VSM W/B.
(b) MENU [OK] key Select preset items.
(c) MENU [] / [] key Adjust setting items.
(d) MENU [] / [] key Adjust the setting values of the setting items.
(e) [DISPLAY] key When this is pressed, you will return to the SERVICE MENU.

(4) 6. STATUS

This is for display only.

(5) 7. PLUG & PLAY (ON)

This is not used for service.

4. Release of SERVICE MENU

After completing the setting, return to the SERVICE MENU by pressing the [DISPLAY] key, then again press the [DISPLAY] key to
return to the normal screen.

(No.YA143)1-17

4.6.3 SERVICE MENU FLOW CHART

SERVICE MENU

SERVICE MENU

1. IF

3. AUDIO

5. VSM W/B

7. PLUG & PLAY (ON)

1-7 : SELECT DISPLAY : EXIT

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

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

2. V/C

4. DEF

6. STATUS

IF SERVICE MENU

1. VCO

2. DELAY POINT

2. V/C

V/C

1. SCREEN

1. IF

PAL

HBC

WBC

BRI

VCO (CW)

TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW

DELAY POINT

AGC TAKEOVER

Setting item

1. SCREEN

2. CUTOFF (B/G)

**
**
**

3. WDR (R/G/B)

4. BRIGHT (TV/VDO1/2)

5. CONT (TV/VDO1/2)

6. COLOUR (TV/VDO1/2)

7. TINT (TV/VDO1/2)

8. SHARP (TV/VDO1/2)
Y DELAY (TV/VDO1/2)

9.

10. TINT DVD

11. AMP T.SHARP

*****

**

MHz

6. STATUS

STATUS

V/C STATUS

ECO EOF NOL VNR

***********

COSMIC STATUS

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

5. VSM W/B

VSM PRESET BRIGHT

1. BRIGHT

***

1. BRIGHT

2. CONT

3. COLOUR

4. SHARP

5.HUE

Setting item

1. R-DRIVE

2. G-DRIVE

3. B-DRIVE

3. AUDIO

AUDIO

1. DCXO ADJ. =
NOT NICAM

0002

0009

000A

***

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

*******

4. DEF

DEF FULL 50Hz

1. V-SHIFT

***

(**)

Setting item

1. DCXO ADJ

2. NICAM lower ERRLIM

3. NICAM upper ERRLIM

4. A2 ID THR

MENU EQUALIZER
DYNAMIC
MUSIC
NEWS
USER

4 : 3 / 16 : 9

Setting item

1. V-SHIFT

2. V-SLOPE

3. V-SIZE

4. H-CENT

5. H-SIZE

6. TRAPEZ

7. EW-PIN

8. COR-UP

Setting value (Hexadecimal)

Setting value

Sereen size

FULL
COMPRESS

9. COR-LO

10. ANGLE

11. BOW

12. V-S. CR

13. V-LIN

14. V-ZOOM

15. V-SCROLL

1-18 (No.YA143)

Fig.1

4.7 ADJUSTMENT PROCEDURE

4.7.1 B1 VOLTAGE

Item

B1 VOLTAGE
check

Measuring

instrument

Signal
generator

B1 (pin 1)
GND (pin 5)
[CN00X

DC voltmeter

connector in
MAIN PWB]

4.7.2 FOCUS ADJUSTMENT

Item

FOCUS
adjustment

Measuring

instrument

Signal
generator

Test point Adjustment part Description

(1) Receive a black and white signal.
(2) Connect a DC voltmeter between B1 and GND

(between pins 1 and 5 of the connector CN00X).

(3) Make sure that the voltage is DC117.5V ± 3V [AV-

21YN14/P] or DC115.0V ± 2V [AV-21YT14/P].

Test point Adjustment part Description

FOCUS VR
[In HVT]

Notes:

• Set PICTURE MODE (VSM) to "BRIGHT".

• The final adjustment of CONVERGENCE must be
done after the FOCUS adjustment. (CONVERGENCE
is affected by the FOCUS adjustment.)
If any aeviation in CONVERGENCE is found, PURITY
must be adjusted to restore the convergence.

(1) Receive a crosshatch signal.
(2) Adjust the FOCUS VR so that the vertical and

horizontal lines will be clear and in fine detail on the
screen.

(3) Make sure that the picture is in focus even when the

screen gets darkened.

4.7.3 IF CIRCUIT ADJUSTMENTS

Item

IF VCO
check

DELAY POINT
(AGC

Measuring

instrument

Remote
control unit

VCO (CW)

TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW

DISPLAY : EXIT

Remote
control unit

. MHz

TAKE-OVER)
adjustment

Adjustment item

2. DELAY POINT

(AGC TAKE-OVER)

Test point Adjustment part Description

[1. IF]

1. VCO (CW)

Note:

• Under normal conditions, no adjustment is required.

(1) Receive a broadcast signal.

Receiving frequency

(2) Select 1. IF from the SERVICE MENU.
(3) Select 1. VCO.
(4) Check the characters color of the JUST

REFERENCE displayed to yellow.

YELLOW

(5) Press the [DISPLAY] key three times to return to

normal screen.

[1. IF]

2. DELAY POINT

(1) Receive a black and white broadcast signal (color off).
(2) Select 1. IF from the SERVICE MENU.
(3) Select 2. DELAY POINT.
(4) Adjust in order to eliminate any noise or beat from

the image. Any increase above the initial value

Initial setting value

NTSC 3.58

VHF UHF

produces the noise and any decrease below it
produces the beat.

(5) Press the [DISPLAY] key three times to return to the

normal screen.

35

35

(6) Turn to other channels and make sure that there are

no irregularities.

(No.YA143)1-19

4.7.4 VIDEO CIRCUIT ADJUSTMENTS

• 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.

• Do not change the initial setting values of the setting (adjustment) items not listed in "ADJUSTMENT PROCEDURE".

• The initial setting values in parenthesis ( ) are fixed offset values, needing no further adjustment.

[AV-21YN14/P]

Adjustment item Variable range

1. SCREEN BRI 0 ~ 63 32 32 32 32

2. CUTOFF B 0 ~ 63 11 11 11 11
G 0 ~ 637777

3. WDR R 0 ~ 63 32 32 32 32
G 0 ~ 63 32 32 32 32
B 0 ~ 63 45 45 45 45

4. BRIGHT RF 0 ~ 63 --- --- 39 --­VIDEO 1 (-32 ~ +31) (0) (0) (0) (0)
VIDEO 2 (-32 ~ +31) (0) (0) (0) (0)

5. CONT. RF 0 ~ 63 --- --- 32 --­VIDEO (-32 ~ +31) (-1) (-1) (-1) (-1)

6. COLOUR RF 0 ~ 63(-32 ~ +31) --- --- 37 --­VIDEO 0 ~ 63(-32 ~ +31) 40 30 (+2) (+2)

7. TINT RF 0 ~ 63(-32 ~ +31) --- --- 27 --­VIDEO (-32 ~ +31) --- --- (+2) (-1)

8. SHARP RF 0 ~ 63 --- --- 48 --­VIDEO 0 ~ 63 48 48 48 48

9. Y DELAY RF 0 ~ 15 --- --- 1 --­VIDEO 0 ~ 15 2 4 (-2) 3

10. TINT DVD VIDEO 0 ~ 63 34 31 32 32

11. AMP T.SHARP RF, VIDEO 0 ~ 63 20 20 20 20

PAL SECAM NTSC3.58 NTSC4.43

Initial setting value

[AV-21YT14/P]

Adjustment item Variable range

1. SCREEN BRI 0 ~ 63 32 32 32 32

2. CUTOFF B 0 ~ 63 11 11 11 11
G 0 ~ 637777

3. WDR R 0 ~ 63 32 32 32 32
G 0 ~ 63 32 32 32 32
B 0 ~ 63 45 45 45 45

4. BRIGHT RF 0 ~ 63 --- --- 39 --­VIDEO 1 (-32 ~ +31) (+1) (+1) (+1) (+1)
VIDEO 2 (-32 ~ +31) (+1) (+1) (+1) (+1)

5. CONT. RF 0 ~ 63 --- --- 32 --­VIDEO (-32 ~ +31) (-2) (-2) (-2) (-2)

6. COLOUR RF 0 ~ 63(-32 ~ +31) --- --- 37 --­VIDEO (-32 ~ +31) 43 30 (+4) (+8)

7. TINT RF 0 ~ 63(-32 ~ +31) --- --- 27 --­VIDEO (-32 ~ +31) --- --- (+1) (+7)

8. SHARP RF 0 ~ 63 --- --- 48 --­VIDEO 0 ~ 63 50 50 50 50

9. Y DELAY RF 0 ~ 15 --- --- 1 --­VIDEO 0 ~ 152423

10. TINT DVD VIDEO 0 ~ 63 34 31 32 32

11. AMP T.SHARP RF, VIDEO 0 ~ 63 20 20 20 20

PAL SECAM NTSC3.58 NTSC4.43

Initial setting value

1-20 (No.YA143)

Item

WHITE
BALANCE
(Low light)
adjustment

Measuring

instrument

Signal
generator

Remote
control unit

Test point Adjustment part Description

[2. V/C]

2. CUTOFF (B)

2. CUTOFF (G)

Note:

• Set PICTURE MODE (VSM) to "BRIGHT".
(1) Receive a PAL black and white signal (color off).

(2) Select 2. V/C from the SERVICE MENU.
SCREEN VR
[In HVT]

(3) Select 2. CUTOFF (B) and (G).

(4) Set each value to initial setting value with the [4] / [7]

keys and [5] / [8] keys.

(5) Turn the SCREEN VR fully counterclockwise, then

V/C

2. CUTOFF

PAL

(B)

(G)

(**)

**

)

(

**

**

slowly turn it clockwise to where a red, blue or green
color is faintly visible.

(6) Use the [4] / [7] and [5] / [8] keys to adjust so that

the other 2 colors appear white.

(7) Turn the SCREEN VR to where the single horizontal

line glows faintly.
(8) Press the [2] key to return to 2. CUTOFF screen.
(9) Press the [DISPLAY] key twice to return to the normal

screen.

WHITE
BALANCE
(High light)
adjustment

B CUTOFF (

B CUTOFF (

REMOTE CONTROL UNIT

12 3

4

)



789

)



Signal
generator

Remote
control unit

3. WDR

REMOTE CONTROL UNIT

12 3

56

G CUTOFF ()

G CUTOFF (

[2. V/C]

3. WDR (R)

3. WDR (G)

3. WDR (B)

V/C

PAL

(R)

(G)
(B)

(**)

**

(

**
**(**

Adjustment Item

2. CUTOFF

B 0 ~ 63 11

Variable Initial setting

range value

G0 ~ 63 7



)

Notes:

• Proceed to the following adjustment after having

completed the WHITE BALANCE (Low light) adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".
(1) Receive a PAL black and white signal (color off).
(2) Select 2. V/C from the SERVICE MENU.
(3) Select 3. WDR (R), (G) and (B).
(4) Set each value to initial setting value with the [4] to

[9] keys.

)

**

)

(5) Use the [4] to [9] keys to produce a white screen.
(6) Press the [DISPLAY] key twice to return to the normal

screen.

Adjustment Item

Variable Initial setting

range value

R0 ~ 63 32*

3. WDR G 0 ~ 63 3 2

B0 ~ 63 45*

R DRIVE (

R DRIVE (

G DRIVE ( )

4

)



789

)



56



B DRIVE ( )



B DRIVE ( )





G DRIVE (

)

(No.YA143)1-21

Item

SUB BRIGHT
adjustment

SUB
CONTRAST
adjustment

SUB COLOR 1
adjustment

Measuring
instrument

Remote
control unit

Remote
control unit

Remote
control unit

Test point Adjustment part Description

[2. V/C]

4. BRIGHT

[2. V/C]

5. CONT

[2. V/C]

6. COLOUR

Notes:

• Proceed to the following adjustment after having
completed the WHITE BALANCE (Low light) and
WHITE BALANCE (High light) adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

(1) Receive a broadcast.
(2) Select 2. V/C from the SERVICE MENU.
(3) Select 4. BRIGHT.
(4) Set the initial setting value.
(5) If the brightness is not best with the initial setting value,

make fine adjustment until you get the best brightness.

(6) Press the [DISPLAY] key twice to return to the

normal screen.

Notes:

• Proceed to the following adjustment after having
completed the SUB BRIGHT adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

(1) Receive a broadcast.
(2) Select 2. V/C from the SERVICE MENU.
(3) Select 5. CONT.
(4) Set the initial setting value.
(5) If the contrast is not best with the initial setting value,

make fine adjustment until you get the best contrast.

(6) Press the [DISPLAY] key twice to return to the

normal screen.

[Method of adjustment without measuring instrument]

Notes:

• Proceed to the following adjustment after having
completed the SUB CONTRAST adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

- PAL COLOR -

(1) Receive a PAL broadcast.
(2) Select 2. V/C from the SERVICE MENU.
(3) Select 6. COLOUR.
(4) Set the initial setting value for PAL COLOR.
(5) If the color is not best with the initial setting value,

adjust until you get the best color.

(6) Press the [DISPLAY] key twice to return to the

normal screen.

- SECAM COLOR -

(1) Receive a SECAM broadcast.
(2) Press the [COLOR SYSTEM] key to select the

SECAM color system.

(3) Adjust SECAM COLOR in the same way as for "PAL

COLOR".

- NTSC 3.58 COLOR -

(1) Input a NTSC 3.58MHz broadcast.
(2) Press the [COLOR SYSTEM] key to select the

NTSC 3.58 color system.

(3) Adjust NTSC 3.58 COLOR in the same way as for

"PAL COLOR".

- NTSC 4.43 COLOR -

When adjustment is done for NTSC 3.58 COLOR,
appropriate values are automatically set for NTSC 4.43
COLOR.

1-22 (No.YA143)

Item

SUB COLOR 2
adjustment

SUB TINT 1
adjustment

Measuring

instrument

Signal
generator

Oscilloscope

Remote
control unit

Y

W

Signal
generator

Remote
control unit

Test point Adjustment part Description

TP-47G
TP-E
[CRT SOCKET
PWB]

[2. V/C]

6. COLOUR

[Method of adjustment using measuring instrument]

Notes:

• Proceed to the following adjustment after having
completed the SUB CONTRAST adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

- PAL COLOR -

(1) Receive a PAL color bar signal (full field color bar

75% white).
(2) Select 2. V/C from the SERVICE MENU.
(3) Select 6. COLOUR.

B

M

R

C

G

(A)

(–)
0V
(+)

(4) Set the initial setting value of PAL COLOR.
(5) Connect the oscilloscope between TP-47G and TP-E.
(6) Adjust PAL COLOR to set the value (A) in the figure

to +13V[AV-21YN14/P] or +15V[AV-21YT14/P].

- SECAM COLOR -

(1) Receive a SECAM color bar signal (color bar 75%

white).
(2) Press the [COLOR SYSTEM] key to select the

SECAM color system.
(3) Set the initial setting value of SECAM COLOR.
(4) Adjust SECAM COLOR to set the value (A) in the

figure to ---.

- NTSC 3.58 COLOR -

(1) Input a NTSC 3.58 color bar signal (full field color bar

75% white).
(2) Press the [COLOR SYSTEM] key to select the

NTSC 3.58 color system.
(3) Set the initial setting value of NTSC 3.58 COLOR.
(4) Adjust NTSC 3.58 COLOR to set the value (A) in the

figure to +4V[AV-21YN14/P] or +2V[AV-21YT14/P].

- NTSC 4.43 COLOR -

When adjustment is done for NTSC 3.58 COLOR,
appropriate values are automatically set for NTSC 4.43
COLOR.

[2. V/C]

7. TINT

[Method of adjustment without measuring instrument]

Notes:

• Proceed to the following adjustment after having

completed the SUB CONTRAST adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

- NTSC 3.58 TINT -

(1) Input a NTSC 3.58 color bar signal (full field color bar

75% white).
(2) Press the [COLOR SYSTEM] key to select the

NTSC 3.58 color system.
(3) Select 2. V/C from the SERVICE MENU.
(4) Select 7. TINT.
(5) Set the initial setting value of NTSC 3.58.
(6) If you cannot get the best tint with the initial setting

value, make fine adjustment until you get the best

tint.
(7) Press the [DISPLAY] key twice to return to the

normal screen.

- NTSC 4.43 TINT -

When adjustment is done for NTSC 3.58 TINT,
appropriate values are automatically set for NTSC 4.43
TINT.

(No.YA143)1-23

Item

SUB TINT 2
adjustment

Measuring
instrument

Signal
generator

Oscilloscope

Remote
control unit

Test point Adjustment part Description

TP-47G
TP-E
[CRT SOCKET
PWB]

[2. V/C]

7. TINT

[Method of adjustment using measuring instrument]

Notes:

• Proceed to the following adjustment after having
completed the SUB CONTRAST adjustment.

• Set PICTURE MODE (VSM) to "BRIGHT".

- NTSC 3.58 TINT -

(1) Input a NTSC 3.58 color bar signal (full field color bar

75% white).

(2) Press the [COLOR SYSTEM] key to select the

NTSC 3.58 color system.
(3) Select 2. V/C from the SERVICE MENU.
(4) Select 7. TINT.
(5) Set the initial setting value of NTSC 3.58.
(6) Connect the oscilloscope between TP-47G and TP-E.
(7) Adjust NTSC 3.58 TINT to set the value (B) in the

figure to +4V[AV-21YN14/P] or +2V[AV-21YT14/P].

(B)

B

M

R

C

W

G

Y

(–)
0V
(+)

(8) Press the [DISPLAY] key twice to return to the

normal screen.

- NTSC 4.43 TINT -

When adjustment is done for NTSC 3.58 TINT,
appropriate values are automatically set for NTSC 4.43
TINT.

4.7.5 AUDIO SETTING [AV-21YT14/P]

This submenu is for display only, no adjustment is required.

Function Item 100Hz 300Hz 1kHz 3kHz 8kHz

MENU EQUALIZER DYNAMIC +4 +3 -10 +3 +4

MUSIC +7+2+5+2+7
NEWS -6 +1 +6 +1 -6
USER 00000

4.7.6 DEFLECTION CIRCUIT ADJUSTMENTS

• 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.

• When performing deflection circuit adjustment, adjusts PAL signal (fv: 50 Hz) in 4:3 mode, and adjust the NTSC signal (fv: 60 Hz)
similarly.

Note:

Proceed to the following adjustment after having completed the adjustments of SUB BRIGHT and SUB PICTURE.

 4. DEF
[AV-21YN14/P]

Variable range Initial setting value

Adjustment item

4:3

50Hz

Others

4:3

50Hz 60Hz

1. V-SHIFT 0 ~ 63 -32 ~ +31 0* 0*

2. V-SLOPE 0 ~ 63 -32 ~ +31 +32 0*

3. V-SIZE 0 ~ 63 -32 ~ +31 +38 0*

4. H-CENT 0 ~ 63 -32 ~ +31 +32 0*

5. H-SIZE 0 ~ 63 -32 ~ +31 0 0*

6. TRAPEZ 0 ~ 63 -32 ~ +31 0* 0*

7. EW-PIN 0 ~ 63 -32 ~ +31 0 0*

8. COR-UP 0 ~ 63 -32 ~ +31 0* 0*

9. COR-LO 0 ~ 63 -32 ~ +31 0* 0*

10. ANGLE 0 ~ 63 -32 ~ +31 +32 0*

11. BOW 0 ~ 63 -32 ~ +31 +32 0*

12. V-S.CR 0 ~ 63 -32 ~ +31 +32 0*

13. V-LIN 0 ~ 63 -32 ~ +31 +32 0*

14. V-ZOOM 0 ~ 63 -32 ~ +31 (+30) 0

15. V-SCROLL 0 ~ 63 -32 ~ +31 (+32) (0)

NOTE: The value with an asterisk * is variable for adjustment. The values in parenthesis ( ) are fixed values.

1-24 (No.YA143)

[AV-21YT14/P]

Variable range Initial setting value

Adjustment item

4:3

50Hz

60Hz

4:3

50Hz 60Hz

1. V-SHIFT 0 ~ 63 -32 ~ +31 +32 0

2. V-SLOPE 0 ~ 63 -32 ~ +31 +32* 0*

3. V-SIZE 0 ~ 63 -32 ~ +31 +32 0*

4. H-CENT 0 ~ 63 -32 ~ +31 +32* 0*

5. H-SIZE 0 ~ 63 -32 ~ +31 0 0

6. TRAPEZ 0 ~ 63 -32 ~ +31 0 0

7. EW-PIN 0 ~ 63 -32 ~ +31 0 0

8. COR-UP 0 ~ 63 -32 ~ +31 0 0

9. COR-LO 0 ~ 63 -32 ~ +31 0 0

10. ANGLE 0 ~ 63 -32 ~ +31 +32* 0*

11. BOW 0 ~ 63 -32 ~ +31 +32* 0*

12. V-S.CR 0 ~ 63 -32 ~ +31 +32* 0*

13. V-LIN 0 ~ 63 -32 ~ +31 +32* 0*

14. V-ZOOM 0 ~ 63 -32 ~ +31 (+30) (0)

15. V-SCROLL 0 ~ 63 -32 ~ +31 (+32) (0)

NOTE: The value with an asterisk * is variable for adjustment. The values in parenthesis ( ) are fixed values.

 COMPRESS: OFF (4:3)

Item

V. SLOPE
adjustment

Measuring

instrument

Signal
generator

Test point Adjustment part Description

[4. DEF]

2. V-SLOPE

- PAL V. SLOPE -

(1) Receive a PAL circle pattern signal of vertical

frequency 50Hz.
Remote
control unit

(2) Select 4. DEF from the SERVICE MENU.
(3) Select 2. V-SLOPE.
(4) Set the initial setting value of 2. V-SLOPE.
(5) Adjust 2. V-SLOPE to make "A = B".
(6) Press the [DISPLAY] key twice to return to

A

Blanking
line

B

SERVICE MENU screen.

- NTSC V. SLOPE -

(1) Input a NTSC circle pattern signal of vertical

frequency 60Hz.

(2) Make similar adjustment of NTSC V-SLOPE in the

same way as for "PAL V-SLOPE".

V. HEIGHT
adjustment

Screen

size

92%

Signal
generator

Remote
control unit

[4. DEF]

3. V-SIZE

14. V-ZOOM

Picture
size
100%

- PAL V. HEIGHT -

(1) Receive a PAL crosshatch signal.
(2) Select 3. V-SIZE.
(3) Set the initial setting value of 3. V-SIZE.
(4) Select 14. V-ZOOM.
(5) Set the initial setting value of 14. V-ZOOM.
(6) Adjust 14. V-ZOOM to make the vertical screen size

to 92% of the picture size.

- NTSC V. HEIGHT -

(1) Input a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC V. HEIGHT in the

same way as for "PAL V. HEIGHT".

(No.YA143)1-25

Item

H. POSITION
adjustment

Measuring
instrument

Signal
generator

Test point Adjustment part Description

[4. DEF]

4. H-CENT

Remote
control unit

CD

- PAL H. POSITION -

(1) Receive a PAL circle pattern signal.
(2) Select 4. H-CENT.
(3) Set the initial setting value of 4. H-CENT.
(4) Adjust 4. H-CENT to make "C = D".

- NTSC H. POSITION -

(1) Input a NTSC circle pattern signal.
(2) Make similar adjustment of NTSC H. POSITION in

the same way as for "PAL H. POSITION".

V.LINEARITY
adjustment

H. PARALLEL
adjustment

Signal
generator

Remote
control unit

Signal
generator

Remote
control unit

Parallel

[4. DEF]

12. V-S. CR

13. V-LIN

TOP

CENTER

BOTTOM

[4.DEF]

10. ANGLE

- PAL V. LINEARITY -

(1) Receive a PAL crosshatch signal.
(2) Select 12. V-S.CR.
(3) Set the initial setting value of 12. V-S. CR.
(4) Select 13. V-LIN.
(5) Set the initial setting value of 13. V-LIN.
(6) Adjust 12. V-S. CR and 13. V-LIN so that the spaces

of each line on TOP, CENTER and BOTTOM
become uniform.

- NTSC V. LINEARITY -

(1) Input a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC V-S. CR in the

same way as for "PAL V-S. CR".

- PAL H. PARALLEL -

(1) Receive a PAL crosshatch signal.
(2) Select 10. ANGLE.
(3) Set the initial setting value of 10. ANGLE.
(4) Adjust 10. ANGLE to optimize the trapezium

distortion at the center of the screen.

- NTSC H. PARALLEL -

(1) Input a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC H. PARALLEL in

the same way as for "PAL H. PARALLEL".

1-26 (No.YA143)

Item

H. BOW
adjustment

Measuring

instrument

Signal
generator

Remote
control unit

4.7.7 VSM PRESET SETTING

Test point Adjustment part Description

[4.DEF]

11. BOW

- PAL H. BOW -

(1) Receive a PAL crosshatch signal.
(2) Select 11. BOW.
(3) Set the initial setting value of 11. BOW.
(4) Adjust 11. BOW to optimize the horizontal arc

distortion.

Straight

- NTSC H. BOW -

(1) Input a NTSC crosshatch signal.
(2) Make similar adjustment of NTSC H. BOW in the

same way as for "PAL H. BOW".

(3) Press the [DISPLAY] key twice to return to the

normal screen.

Item

VSM
PRESET
setting

Measuring

instrument

Remote
control unit

SUB MENU 5. VSM W/B

VSM PRESET BRIGHT

1. BRIGHT

Test point Adjustment part Description

[5. VSM W/B]

1. BRIGHT

2. CONT

3.COLOUR

4. SHARP

5. HUE

1. R-DRIVE

2. G-DRIVE

3. B-DRIVE

(1) Select 5. VSM W/B from the SERVICE MENU.
(2) Select BRIGHT with the MENU [OK] key.
(3) Set the value of 1. BRIGHT ~ 5. HUE to the values

shown in the table.

(4) Respectively select the VSM PRESET mode for

SOFT and STANDARD.

(5) Select COOL with the MENU [OK] key.
(6) Set the values of 1. R-DRIVE ~ 3. B-DRIVE to the

value shown in the table.

(7) Select the W/B preset for WARM and NORMAL,

respectively.

(8) Press the [DISPLAY] key twice to return to the

normal screen.

***

[Setting Values for SUB 5. VSM W/B]

VSM preset

BRIGHT STANDARD SOFT

Setting item

1. BRIGHT 0+4

2. CONT +15 +4 +1

3. COLOUR 00

4. SHARP 0 -10

5. HUE 0

W/B preset

COOL NORMAL WARM

Setting item

1. R-DRIVE 0 0 +10

2. G-DRIVE +20-4

3. B-DRIVE 0 -10 -12

+4

0

0

00

(No.YA143)1-27

4.7.8 PURITY AND CONVERGENCE

 PURITY ADJUSTMENT

Note:

The final adjustment of CONVERGENCE must be done after
the FOCUS adjustment. (CONVERGENCE is changed by
FOCUS adjustment.)
When makes difference by FOCUS adjustment, should be
reconfirming PURITY adjustment.

(1) Demagnetize CRT with the demagnetizer.

(2) Loosen the retainer screw of the deflection yoke.

CRT

WEDGE

DEFLECTION
YOKE

P

4 6

P / C

MAGNETS

(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 so that

it will not move.

(10) Input a crosshatch signal.

• P/C MAGNETS

P : PURITY MAGNET
4 : 4 POLES (convergence magnets)
6 : 6 POLES (convergence magnets)

Fig.1

PURITY MAGNETS

Long lug

Short lug

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

Fig.2

(FRONT VIEW)

GREEN RASTER

(11) Verify that the screen is horizontal.

(12) Input red and blue raster signals, and make sure that purity

is properly adjusted.

1-28 (No.YA143)

CENTER

Fig.3

 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.

(FRONT VIEW)

Fig.1

(FRONT VIEW)

 DYNAMIC CONVERGENCE ADJUSTMENT

(1) Move the deflection yoke up and down and overlap the lines

in the periphery. (Fig. 2)

(2) Move the deflection yoke left to right and overlap the lines in

the periphery. (Fig. 3)

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

(4) Adjust XV by XV coil. (Fig.4)

• After adjustment, fix the wedge at the original position. Fasten
the retainer screw of the deflection yoke. Fix the P/C magnets
with glue.

GREEN

RED

RED

BLUE

BLUE

GREEN

Fig.2

(FRONT VIEW)

GREEN GREEN

RED

BLUE

Fig.3

BLUE

BLUE

RED

GREENGREEN

BLUE

RED

RED

RED

GREEN
BLUE

BLUE
GREEN

RED

(FRONT VIEW)

Xv

GREEN

Fig.4

(No.YA143)1-29

SECTION 5

TROUBLESHOOTING

5.1 SELF CHECK FUNCTIONS

5.1.1 OUTLINE

This model has self check functions given below. When an abnormality has been detected, the SUB POWER is turned off and POWER
LED flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the
microcomputer.

5.1.2 SELF CHECK ITEMS

Check item Details of detection Method of detection State of abnormality

B1 over-current protection An over-current on the low B1

line is detected.

CRT neck broken protection Operation of CRT neck

protection circuit.

5.1.3 SELF CHECK INDICATING FUNCTION

When an abnormality has been detected at about 5 seconds
after the power was turned on, the SUB POWER is turned off
immediately and the POWER LED flashes.

The main microcomputer
detects the possible abnormality
at 24-msec. intervals and judges
the results in every 16 time. Of
the 16 times, if NG is detected
more than 9 times, it is judged
that there is an abnormality.

After about
5 seconds

When an abnormality has been
detected, the SUB-POWER is
turned off. While the SUB­POWER is being turned off, the
POWER key on the remote
control unit is not operational
until the power cord is
disconnected and connected
again.

Detection of
an abnormality

Power on
Port

[ INDICATION BY THE POWER LED]

Item LED flashing intervals

B1 over-current protection / CRT neck broken protection 0.3 seconds

Start of
detection

Flashing LED

SUB-POWER OFF

1-30 (No.YA143)

Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan

(No.YA143)

Printed in Japan

VPT