JVC AV-32220/G, AV-32220/H, AV-32220/M Service Manual

A

SERVICE MANUAL

COLOR TELEVISION

AV-32220

/G

V-32220

BASIC CHASSIS

GF3

AV-32220
AV-32220

/H

/M

CONTENTS

!

SPECIFICATIONS

!

SAFETY PRECAUTIONS

!

FEATURES

!

MAIN DIFFERENCE LIST

!

HOW TO IDENTIFY MODELS

!

FUNCTIONS

!

SPECIFIC SERVICE INSTRUCTIONS

!

SERVICE ADJUSTM ENTS

!

PARTS LIST

★

OPERATING INSTRUCTIONS

★

STANDARD CIRCUIT DIAGRAM

1

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.

････････････････････････････････ ････

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

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

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

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

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

･････････････････

･･････････････････････････････････

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････････････････････････････････ ････

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

･･････････････････

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･･･････

･･････････････

･･････

････････････

････

････････

2-1

2
3
4
4
4
5

6
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31

No.51782

Jan. 2001

Jan. 2001

A

V-32220

SPECIFICATIONS

Items Contents

Dimensions (W
Mass
TV System and Color system

TV RF System
Color System
Sound System

TV Receiving Channels and Frequency

VL Band
VH Band
UHF Band

CATV Receiving Channels and Frequency

Low Band
High Band
Mid Band
Super Band
Hyper Band
Ultra Band
Sub Mid Band

TV/CATV Total Channel
Intermediate Frequency

Video IF Carrier
Sound IF Carrier

Color Sub Carrier
Power Input
Power Consumption
Picture Tube
High Voltage
Speaker
Audio Power Output
INPUT

S-Video

Video
Audio

Audio Output
(Variable / Fix : Selectable)

AV Compu link EX Input
Antenna terminal
Remote Control Unit

××××H××××

D)

30-1/4”×26-1/4”×21-1/2” inch / (768mm×667mm×547mm)

112.2lbs (51.0kg)

CCIR(M)
NTSC
BTSC (Multi Channel Sound)

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

(02～06, A-8) by (02～06&01)
(07～13) by (07～13)
(A～1) by (14～22)
(J～W) by (23～36)
(W+1～W+28) by (37～64)
(W+29～W+84) by (65～125)
(A8, A4～A1) by (01, 96～99)

180 Channels

45.75 MHz

41.25 MHz (4.5MHz)

3.58 MHz
120V AC, 60Hz
125W / 1.8A
32” (80cm) measured diagonally, Ful l Square

31.0kV±1.3kV (at zero beam current )
2”×4-3/4” / 5×12cm Oblong type×2

3W+3W

Y : 1Vp-p positive (negative sync provided, when term i nated with 75Ω)
C : 0.286Vp-p (burst signal, when terminated with 75Ω)

1Vp-p 75Ω (RCApin jack)
500mVrms (-4dBs ), High Impedance (RCA pin jack)

Variable: More then 0～1550mVrms (+6dBs)

Low Impedance (400Hz when modulated 100%) (RCA pin jack)

Fix : 500mVrms(-4dBs)

Low Impedance (400Hz when modulated 100%) (RCA pin jack)

3.5mm mini jack
75Ω (VHF/UHF) Termi nal , F-Type Connector

RM-C306-1A (AA/R6/UM-3 battery×2)

Design & specifications are subject to change without notice.

(54MHz

～

804MHz)

2

No.51782

A

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 characteristi cs. These charact eris t ics are
often not evident from visual inspection nor c an 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 (
in Service manual.

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.

Use isolation transformer when hot chassis.

The chassis and any sub-chassis contained in some products
are connected to one side of the AC power line. An isolation
transformer of adequate capacity should be inserted between
the product and the AC power supply point while performing
any service on some products when the HOT chassis is
exposed.

5.

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 diff erent 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 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.

6. 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).

7. 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.

8. 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.

9. 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.

The use of a substitute replacement which

!!!!

) on the parts list

V-32220

10.

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, screwheads, earphone jack, control
shafts, etc.) to be sure the product is safe to operate without
danger of electrical shock.

(1)

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
1100V 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.

(2)

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 c urrent 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 1000 ohms per volt or more sensitivi ty 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 t o each exposed metal
part, particularly any exposed metal part having a return path to
the chassis, and measure the AC voltage across the res istor.
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

GOOD
EARTH
GROUND

11.

High voltage hold down circuit check.

After repair of the high voltage hold down circuit, this circuit
shall be checked to operate correctly.
See item "

circuit

This mark shows a fast
operating fuse, the
letters indicated below
show the rating.

0.15μF AC-TYPE

Ω

10W

1500

How to check the high voltage hold down

".

OR MORE SENSITIVITY)

PLACE THIS PROBE
ON EACH EXPOSED
METAL PART

POWER CORD
REPLACEMENT WARNING.

Connecting the white line side of power
cord to “WHT” character side.

Ω

/V,

A V

No. 51782

3

A

V-32220

FEATURES

"

New chassis design enables use of a main board with

simplified circuitry.

"

Digital comb filter Improved picture quality.

"

Full-s quare CRT (cathode ray tube) reproduces fine textured

picture in every detail.

"

Closed-caption broadcasts can be viewed.

"

With AUDIO. VIDEO INPUT terminal.

2

"

I

C bus control utilizes single chip ICs.

MAIN DIFFERENCE LIST

Model

!

Part name
MAIN PWB

PICTURE TUBE

!

DEG.COIL

!

AV-32220

SGF-1017A-M2 SGF-1002A-M2 SGF-1003A-M2

A80QCF240X14L A80LJF30X08(G) M80JUA061X06

QQW0086-001 CELD066-002JA

/G

"

S-VIDEO input terminal for taking best advantage of Super

VHS.

"

Variable / Fix audio output terminal.

"

With AV COMPU LINK EX terminal.

AV-32220

/H

AV-32220

/M

←

HOW TO IDENTIFY MODELS

The difference between
As the result of the difference in

!

Parts name

RATING LABEL LC31139-001A-A

!

AV-32220/G, AV-32220/H

PICTURE TUBE

MODEL

AV-32220

INDICATED AV-32220 INDICATED AV-32220 INDICATED AV-32220

INDICATED

and

AV-32220/M

, the

MAIN PWB

/G

““““G””””

is in the

also differ.

PICTURE TUBE

AV-32220

←←←←

INDICATED

/H

““““H””””

.

AV-32220

/M

←←←←

INDICATED

““““M””””

4

No. 51782

A

FUNCTIONS

V-32220

FRONT PANEL

① ② ⑤④ ⑥ ⑦

REMOTE CONTROL UNIT

④

⑤
⑥

⑦

⑧

⑩

⑭

③

①

②

③

⑫
⑨

⑬
⑪

①

INPUT 2(V, L, R)

②

MENU CONTROL KEY

③

CHANNEL UP/DOWN KEYS

④

VOLUME UP/DOWN KEYS

⑤

POWER BUTTON

⑥

ON TIMER LAMP

⑦

REMOCON WINDOW

①

POWER BUTTON

②

INPUT SELECT KEY

③

CHANNEL KEYS

④

VIDEO STATUS KEY

⑤

DISPLAY KEY

⑥

SLEEP TIMER KEY

⑦

HYPER SURROUND KEY

⑧

MUTING KEY

⑨

V-CHIP KEY

⑩

MENU KEY

⑪

EXIT KEY

⑫

VOLUME UP/DOWN KEYS

⑬

CHANNEL UP/DOWN KEYS

⑭

VCR CONTROL KEYS

REAR PANEL

①

①

INPUT 1(S, V, L, R)

②

INPUT 2(V, L, R)

②

③

⑤

④

No. 51782

③

AUDIO OUTPUT

④

AV COMPULINK EX JACK

⑤

AERIAL SOCKET

5

A

V-32220

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

"

Unplug the power supply cord.

1. Remove the 11 screws marked

2. Remove the rear cover toward you.

*

When reinstalling the rear cover, carefully push it inward after
inserting the chassis into the rear cover groove.

as shown in Fig.2.

AAAA

REMOVING THE CHASSIS

"

After removing the rear cover.

1. Slightly raise the both sides of the chassis by hand and remove
the 2 claws under the both sides of the chassis from the front
cabinet.

2. Draw the chassis backward along the rail in the arrow direction
marked
(If necessary, take off the wire clamp, connector’s etc.)

*

When conducting a check with power supplied, be sure to
confirm that the CRT earth wire is connected to the CRT
SOCKET PWB and the MAIN PWB.

as shown in the Fig.2.

BBBB

REMOVING THE TERMINAL BOARD

"

After removing the rear cover.

1. Remove the 3 screws marked

2. After removing the claw marked
mark as shown in Fig.1.

3. When you pull out the TERMINAL BOARD in the direct ion of
arrow marked

as shown in Fig.1, it can be removed.

FFFF

as shown in Fig.2.

CCCC

in the direction of arrow

EEEE

CHECKING THE MAIN PW BOARD

1. To c heck t he backsi de of t he MAIN PW Board.
(1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).
(2) Erect the chassis vertically so that you can easily check the

backside of the MAIN PW Board.

[CAUTION]

When erecting the chassis, be careful so that there will be no

•

contacting with other PWB.
Before turning on power, make sure that the CRT earth wire and

•

other connectors are properly connected.

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie used for tying the wires together.

Should it be inadvertently removed, be sure t o tie the wires with
a new cable tie.

TERMINAL BOARD

REMOVING THE FRONT CONTROL PW BOARD

"

After removing the rear cover and chassis.

1. Remove the 2 screws marked

2. Then remove the FRONT CONTROL PWB.

as shown in Fig.2.

DDDD

REMOVING THE SPEAKER

"

After removing the rear cover and chassis.

1. Remove the 2 screws marked

2. Follow the same steps when removing the other hand speaker.

as shown in Fig.2.

GGGG

F

E

Fig. 1

6

No. 51782

A

V-32220

FRONT CABINET

PICTURE TUBE

CRT SOCKET

PWB

FRONT

CONTROL

PWB

SPEAKER

G

AV SELECTOR

PWB

FRONT JACK

PWB

CLAW

MAIN PWB

TUNER

SPEAKER

REAR COVER

D

B

G

CLAW

C

CHASSIS BASE

TERMINAL

BOARD

POWER CORD

A

Fig.2

No. 51782

7

A

V-32220

A

A
A

A

A

REMOVING THE CRT

Replacement of the CRT should be performed by 2 or more

!

persons.

After removing the rear cover, chassis etc.,

"

1. Putting the CRT change table on soft cloth, the CRT change
table should also be covered with such soft cloth (shown in
Fig.3).

2. W hile keeping the surface of CRT down, mount the TV set on
the CRT change table balanced will as shown in Fig.4.

3. Remove 4 screws marked by arrows with a box type
screwdriver as shown in Fig.4.

Since the cabinet will drop when screws have been removed,

"

be sure to support the cabinet with hands.

4. After 4 screws have been rem oved, put the cabinet slowly on

cloth (At this time, be carefully so as not to damage the front
surface of the cabinet) shown in Fig.5.

The CRT should be assembled according to the opposite

"

sequence of its dismounting steps.

The CRT change table should preferably be smaller that the

!

CRT surface, and its height be about 35cm.

CRT CHANGE TABLE

PPROX.

35cm

CLOTH

Fig. 3

CRT

CRT
CHANGE
TABLE

BOX
TYPE
SCREW
DRIVER

COATING OF SILICON GREASE FOR ELECTRICAL
INSULATION ON THE CRT ANODE CAP SECTION.

Subsequent to replacement of the CRT and HV transformer or

"

repair of the anode cap, etc. by dismounting them, be sure to
coat silicon grease for electrical insulation as shown in Fig.6.
Wipe around the anode button with clean and dry cloth. (Fig.6)
Coat silicon grease on the section around the anode button. At
this time, take care so that any silic on greases dose not sticks
to the anode button. (Fig.7)

★★★★

Silicon grease product No. KS - 650N

CRT

node button

CABINET

pprox.
20mm (Do not
coat grease on
this section

Fig. 4

CRT

CRT
CHANGE TABLE

Fig. 5

Silicon grease
should be coated
by 5mm or more
from the outside
diameter of anode
cap.

Silicon grease

coating

Fig. 6 Fig. 7

8

No. 51782

node button
(No sticking of
silicon grease)

Coating position
of silicon grease

node cap

A

SYSTEM BLOCK DIAGRAM

IC702

MEMORY

SDA1SCL1

IC701

MAIN MICON

SDA3SCL3

AFC

V-32220

IF

Remote

control

unit

IC601

MTS, TONE

SURROUND CONTROL

IC201

1 CHIP

CONTROL

TU001

TUNER

No.51782

9

A

V-32220

REPLACEMENT OF CHIP COMPONENT

!

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.

!

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.

!

REPLACEMENT STEPS

How to remove Chip parts

1.

####

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 tweezers and remove the chip part.

####

Transistors, diodes, variable resistors, etc

(1) Apply extra solder to each lead.

SOLDER

SOLDER

2. How to install Chip parts

####

Resistors, capacitors, etc

(1) Appl y solder to the pattern as indicated in the figure.

(2) Gras p 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) Appl y 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

as indicated in the figure.

A

A

(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.

10

No.51782

(4) Then solder leads

and C.

B

C

A

C

B

B

A

MEMORY IC REPLACEMENT

(CW)

1. Memory IC

This model uses a memory IC.
This memory IC stores data for proper operation of the video and deflection circuits.
When replacing, be sure to use an IC containing this (initial value) data.

2. Memory IC replacement procedure

Procedure Screen display

(1) Power off

Switch off the power and disconnect the power cord from the outlet.

(2) Replace the memory IC

Initial value must be entered into the new IC.

(3) Power on

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

V-32220

(4) System constant check and setting

It must not adjustment

1) Press

SLEEP TIMER

” is being displayed, press

MIN.

key and, while the indication of “

DISPLAY

key and

VIDEO STATUS

SLEEP TIMER 0

on the remote control unit simultaneously.

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

3) While the SERVICE MENU is displayed, again simultaneously press
the

DISPLAY

and

VIDEO STATUS

keys to display the Fig.2 SYSTEM

CONSTANT screen.

4) Refer to the SYSTEM CONSTANT table and check t he setting items.
Where these differ, select t he setting item with the
key and adjust the setting with the

MENU LEFT/RIGHT

MENU UP/DOWN

keys. (The

letters of the selected item are displayed in yellow.)

5) After adjusting, release the

MENU LEFT/RIGHT

key to store the setting

value.

6) Press the

key twice to return the normal screen.

EXIT

(5) Receive channel setting

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

key

SERVICE MENU
PICTURE SOUND

THEATER OTHERS

LOW LIGHT HIGH LIGHT
RF AFC
VCO

SELECT BY
OPERATE BY EXIT BY

I2C BUS CTRL

Fig.1

SYSTEM CONSTANT
MODEL : XX-XXXXX

CCD : YES
BBE : NO
V-CHIP : YES
CAN V-CHIP : NO
XXXXXXXXX XXX

SELECT BY
OPERATE BY EXIT BY

Fig.2

EX
IT

EX
IT

(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 set in the SERVICE MENU, and set whatever is
necessary. (Fig.1) Refer to the SERVICE ADJUS T MENT for setting .

No. 51782

11

A

V-32220

TABLE 1 (System Constant setting)

Setting item Setting constant Setting value

MODEL

CCD

BBE

V-CHIP

CAN V-CHIP

TABLE 2 (User setting)

Setting item Setting value Setting item Setting value

1. Use remote controller keys

POWER
CHANNEL
VOLUME
TV/VIDEO
HYPER SURROUND

Display the each application model

OFF
CH-02
Proper sound volume
TV
OFF

YES NO

YES NO

YES NO

YES NO

DISPLAY
VIDEO STATUS
SLEEP TIMER

Comformable model name

YES

NO

YES

YES

OFF
STANDARD
0

2. Settings of MENU with remote control keys
PICTURE ADJUST

TINT
COLOR
PICTURE
BRIGHT
DETAIL

NOISE MUTING
SET VIDEO STATUS

SOUND ADJUST

BASS
TREBLE
BALANCE
MTS

CLOCK / TIMERS

SET CLOCK
ON/OFF TIMER

CENTER
CENTER
CENTER
CENTER
CENTER

ON
ALL CENTER

CENTER
CENTER
CENTER
STEREO

Unnecessary to set
NO

INITIAL SETUP

TV SPEAKER
AUDIO OUT
LANGUAGE
CLOSED CAPTION

AUTO TUNER SET UP
CHANNEL SUMMARY

SET LOCK CODE

ON
FIX
ENG
OFF

TUNER MODE : AIR
Unnecessary to set

Unnecessary to set

12

No. 51782

A

V-32220

SERVICE ADJUSTMENT

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 which
set 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 specif i ed in the list for this adj ustment-variabl e resistors, transformers, condensers, etc.

7. Presetting before adjustment.
Unless otherwise specified in the adjustment instructions, preset t he following functions with the remote control unit.

""""

User mode setting position

(1) VIDEO STATUS STANDARD

(2) HYPER SURROUND OFF

(3) BASS, TREBLE, BALANCE CENTER

(4) TINT, COLOR, PICTURE, BRIGHT, DETAIL CENTER

MEASURING INSTRUMENT

1. DC voltmeter(or digital voltmeter)

2. Oscilloscope

3. Signal generator ( Pattern generator ) [NTSC]

4. Remote control unit

5. TV audio multiplex signal generator

6. Frequency counter

ADJUSTMENT ITEMS

●

Check of B1 POWER SUPPLY

●

IF VCO adjustment

●

RF AGC adjustment

●

FOCUS adjustment

●

DEFLECTION adjustment

V. CENTER, V. SIZE, V. POSITION adjustment
H. WIDTH, SIDEPIN CORRECT and H. POSITION
adjustment

●

VIDEO / CHROMA adjustment

WHITE BALANCE (Low light) adjustment
WHITE BALANCE (High light) adjustment
SUB BRIGHT adju st ment
SUB CONTRAST adjustment
SUB COLOR adjustment
SUB TINT adjustment

●

MTS circuit adjustment

INPUT LEVEL check
STEREO VCO adjust me nt
SAP VCO adjustment
FILTER check
SEPARATION adjustment

No. 51782

13

A

V-32220

(

)

ADJUSTMENT LOCATIONS

MAIN PWB ASS'Y

FRONT

S

AV SELECTOR
PWB

CN001

MPX

D

memory IC

IC702

IC701

CPU

F901(5A)

PW

X

H.WIDTH

SIDEPIN

CORRECT

13

T

FM DET

T161

IC201

TUNER

CW

T131

DEG.

HV

V CENTER SW

S421

U

(BRAIDED ASS'Y)

E1

CRT EARTH

1

3

B1

HVT

HVT

HVTHVT

UPPER : FOCUS
LOWER : SCREEN

TP-E
( )

B1
(TP-91)

CRT SOCKET PWB ASS'Y

(SOLDER SIDE)

TP-R

TP-B

T

TP-E( )

CRT EARTH

(BRAIDED ASS'Y)

14

E2

TOP

U

FRONT CONTROL PWB ASS'Y

POWER MENUVOL CH

IC841

D

-

+-

+

FRONT

FRONT JACK PWB ASS'Y

FRONT

J001

No. 51782

F

A

BASIC OPERATION OF SERVICE MENU

(CW)

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 verifications are perf orm ed in the SERVICE MENU.

PICTURE

"

SOUND

"

THEATER

"

OTHERS

"

LOW LIGHT

"

HIGH LIGHT

"

RF AFC

"

VCO (CW)

"

2

C BUS CTRL

I

"

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

Press

STATUS

････････････････････

･････････････････････

･･･････････････････

････････････････････

･･････････････････

･････････････････

･････････････････････

･･･････････････････

････････････････

SLEEP TIMER

key and, while the indication of “

This set the setting values (adjustment values) of the VIDEO/CHROMA and DEFLECTION circuits.
This set the setting values (adjustment values) of the AUDIO circuit.
This is used when the THEATER MODE is adjusted.
This is used when the OTHERS MODE is adjusted.
This sets th e setting values (ad justm ent values) of the WHI T E BALAN CE circuit.
This sets th e setting values (ad justm ent values) of the WHI T E BALAN CE circuit.
This is used when the RF AFC MODE is verified.
This is used when the IF VCO is adjusted.
This is used when ON/OFF of the I2C BUS CT RL is set.

SLEEP TIMER 0 MIN.

key on the remote control unit simultaneously to enter the

[Do not adjust]

” is being displayed, press

SERVICE MENU

[Fixed ON]

DISPLAY

key and

screen ① shown in the next figure page.

V-32220

VIDEO

(2) SERVICE MENU screen selection

Press the UP / DOWN key of the MENU to select any of the following items.
(The letters of the selected items are displayed in yellow.)

●

PICTURE

●

THEATER

●

LOW LIGHT

●

RF AFC

●

VCO (CW)

●

SOUND

●

OTHERS

●

HIGH LIGHT

●

I2C BUS CTRL

SERVICE MENU

SERVICE MENU
PICTURE SOUND

THEATER OTHERS

LOW LIGHT HIGH LIGHT
RF AFC
VCO

SELECT BY
OPERATE BY EXIT BY

(MAIN MENU)

I2C BUS CTRL

(3) Enter the any setting ( adjustment ) mode

"

PICTURE, SOUND and OTHERS mode

1) If select any of PICT URE, 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 / DOWN key is pressed, the PICTURE mode screen ③ or the SOUND mode screen ④ or t he OTHERS mode
screen ⑤ is displayed, and the PICTURE, SOUND or OTHERS setting can be performed.

"

THEATER, LOW LIGHT, H IGH LIGHT, RF AFC, VCO (CW) and I

1) If select any of THEATER / LOW LIGHT / HIGH LIGHT / RF AFC / VCO (CW) / I
is pressed from SERVICE MENU ( MAIN MENU ), the screens

2

C BUS CTRL mode

6 7 8 ⑨

2

⑩ ⑪

C BUS CTRL items, and the LEFT / RIGHT key

will be displayed as shown in figure page

later.

2) Then the settings or verifications can be performed.

EX
IT

No. 51782

15

A

V-32220

(CW)

SERVICE MENU (MAIN MENU)

①①①①

SERVICE MENU
PICTURE SOUND

THEATER OTHERS

LOW LIGHT HIGH LIGHT
RF AFC
VCO

SELECT BY
OPERATE BY

I2C BUS CTRL

EXIT BY

PICTURE MODE

SCREEN

②②②②

EX

IT

SELECT BY

EXIT BY

EX

IT

③③③③

1. BRIGHT
STATUS

***

********

HIGH LIGHT MODE

⑧⑧⑧⑧

HIGH LIGHT

*** ***

RF AFC MODE

⑨⑨⑨⑨

[DO NOT ADJUST ]

RF AFC ON
FINE
STATUS

SELECT BY
OPERATE BY

VCO (CW) MODE

⑩⑩⑩⑩

********

EXIT BY

***

SOUND MODE

④④④④

1. ATTENUATOR
STATUS

EX

IT

THEATER MODE

⑥⑥⑥⑥

***

********

⑤⑤⑤⑤

1. OSD POS.

OTHERS MODE

***

HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL

SYNC : YES

I2C BUS CTRL MODE

⑪⑪⑪⑪

[FIXED ON]

I2C BUS ON

SELECT BY
OPERATE BY

16

EXIT BY

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

G DRIVE
B DRIVE
R CUT.
G CUT.
B CUT.

***

TINT
COLOR
PICTURE
BRIGHT
DETAIL

SELECT BY
OPERATE BY

LOW LIGHT MODE

⑦⑦⑦⑦

EX

IT

BRIGHT

*** *** ***

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

EXIT BY

EX

IT

No. 51782

A

(4) Setting method

1) UP / DOWN 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 SETTING VALUE will be stored
(memorized).

3) EXIT key

Returns to the previous screen.

(5) Releasing SERVICE MENU

1) A fter returning to the SERVICE MENU upon completion of the setting

(adjustment) work, press the EXIT key again.

SETTING
ITEM

1. BRIGHT
STATUS

PICTURE MODE

***

********

INITIAL
SETTING VALUE

↓ (Adjust)

SETTING VALUE

V-32220

★

The settings for LOW LIGHT and HIGH LIGHT are described in the WHITE
BALANCE page of ADJUSTMENT.

★

The setting for VCO (CW) are described in the IF VCO page of AD JUSTMENT.

The letters of the selected
items are displayed in
yellow.

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

G DRIVE
B DRIVE
R CUT.
G CUT.
B CUT.

TINT
COLOR
PICTURE
BRIGHT
DETAIL

SELECT BY
OPERATE BY EXI T BY

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

THEATER MODE

1. ATTENUATOR
STATUS

***

********

SOUND MODE

EX

IT

1. OSD POS.

***

OTHERS MODE

No. 51782

17

A

V-32220

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 “ADJUSTMENT”.

"

PICTURE MODE

$

The four setting items in the video mode No.8 EXT BRI., No.9 EXT PIC., No.12 EXT TINT and No.13 EXT COLOR are linked to the items in

the TV MODE No.1 BRIGHT, No.2 PICTURE, No. 6 TINT and No.7 COLOR, respectively. When the setting items in the TV mode are
adjusted, the values in the setting items in the video mode are revised automatically to the same values in the TV mode. (The initial setting
values given in ( ) are off-set values.)

$

When the four items (No.8, 9, 12 and 13) are adjusted in the video mode, the setting values in each item are revised independently.

No.

Setting (Adjustment) item Variable range Initial setting value (ALL MODEL)

1. BRIGHT

2. PICTURE

3. WPS (WHITE PEAK SUPPRESSOR) 000 / 001 001

4. TV DETAIL

5. TV BPF (TV B.P.FILTER) 000 / 001 001

6. TINT

7. COLOR

8. EXT BRIGHT ±025 (+001)

9. EXT PICT. ±025

10. EXT DETAIL

11. EXT BPF (EXT B.P.FILTER) 000 / 001 001

12. EXT TINT ±025 (+007)

13. EXT COLOR ±025 (+005)

14. V SIZE

15. V CENTER

16. H POSITION

17. H AFC 000 / 001 000

18. BLANKING 000 / 001 000

19. RF AGC

20. PIF VCO

"

SOUND MODE

No.

Setting (Adjustment) item Variable range Initial setting value (ALL MODEL)

1. ATTENUATOR

2. BALANCE

3. NOISE DET. 000 / 001 001

4. IN LEVEL (INPUT LEVEL)

5. FH MONITOR 000 / 001 000

6. STEREO VCO

7. PILOT CAN. (PILOT CANCELER) 000 / 001 000

8. FILTER

9. LOW SEP. (LOW SEPARATION)

10. HI SEP. (HIGH SEPARATION)

11. 5FH MON. (5FH MONITOR) 000 / 001 000

12. SAP VCO

13. IN GAIN 000 / 001 000

14. FIL.OFFSET

15. BBE BASS

16. BBE TRE

000～127
000～127

000～063

000～127
000～127

000～063

000～063
000～007
000～031

000～063 050
000～127

000～063
000～063

000～063

000～063
000～063

000～063
000～063

000～063

±

010

±

010

±

010

064
090

040

074
053

(±000)

038

028
000
022

064

050
032

027

023
030

028
019

027

±

000

-001

-001

18

No. 51782

A

"

A

THEATER MODE

Setting (Adjustment) item Variable range Initial setting value (ALL MODEL)

V-32220

TINT
COLOR
PICTURE
BRIGHT
DETAIL
G DRIVE
B DRIVE
R CUT. (R CUTOFF)
G CUT. (G CUTOFF)
B CUT. (B CUTOFF)

"

OTHERS MODE

No.

Setting (Adjustment) item Variable range Initial setting value (ALL MODEL)

1. OSD POS.

2. CCD POS.

-20～+20

-20～+20

-30～+20

-20～+20

-15～+15

-99～+50

-99～+50

±

10

±

10

±

10

000～007
000～015

±

-02

-15

±

-03

-25

-72

±
±
±

000
006

00

00

00
00
00

(CLOSED CAPTION DECODER POS.)

3. EOSEL 000 / 001 000

4. F1 FIELD 000 / 001 000

5. F1 LINE21

6. F2 LINE21

000～015
000～015

008
008

7. OSD STABI 000 / 001 000

8. SYNC SEP. 000 / 001 001

9. MENU COLOR

10. MENU PICT

11. MENU BRI

-030～±000

-030～±000

-030～±000

-010

-012

-012

12. TU1 FM TRAP 000 / 001 000

13. TU2 FM TRAP 000 / 001 000

"

LOW LIGHT MODE

Setting (Adjustment) item Variable range Initial setting value

R CUTOFF
G CUTOFF
B CUTOFF

"

HIGH LIGHT MODE

000～255
000～255
000～255

020
020
020

Setting (Adjustment) item Variable range Initial setting value

G DRIVE
B DRIVE

"

RF AFC MODE

000～255
000～255

128
128

Setting (Adjustment) item Variable range Initial setting value

RF AFC ON/OFF ON
FINE

"

I2C BUS CTRL MODE

-77～+77

±××

DO NOT
ADJUST

Setting (Adjustment) item Variable range Initial setting value

I2C BUS ON/OFF

[Fixed ON]

DO NOT

DJUST

No. 51782

19

A

V-32220

■■■■

ADJUSTMENT

B1 POWER SUPPLY

Item

Check of
B1 POWER
SUPPLY

Measuring
instrument

DC Voltmeter

ADJUSTMENT OF IF. VCO

Item

IF VCO
adjustment

Measuring

instrument
Signal
generator

HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL

SYNC : YES

Test point Adjustment part Description

【【【【B1】】】】

B1 (
Connector

①①①①

pin)

(TP-91)
TP-E(#)

【【【【B1】】】】

(
Connector

③③③③

pin)

Test point Adjustment part Description

CW TRANSF .
[VCO(CW)] MODE

YELLOW

1. Receive a black-and-white signal. (Color off)

2. Connec t the DC Voltmeter to【B1】connector ① pin (TP-91)
and TP-E(#) (B1 connector ③ pin).

3. Confirm that the voltage is DC134V±2V.

"

Under norm al c onditi ons, no adjustment is required.

1. Receive a NTSC aer. broadcast.

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

3. Confirm the color change (yellow) from 「HIGH LEVEL」to

「

LOW LEVEL」by CW TRANSF. and “SYNC : YES” being

shown on the screen. Then, adjust CW TRANSF. until

「

REFERENCE LEVEL」mark turns yellow and confirm again

“

SYNC : YES” being shown on the screen.

ADJUSTMENT OF RF AGC

Item

RF. AGC
adjustment

Measuring
instrument

ADJUSTMENT OF FOCUS

Item

FOCUS
adjustment

Measuring

instrument
Signal
generator

Test point Adjustment part Description

No.19 RF AGC

Test point Adjustment part Description

FOCUS VR
[In HVT]

1. Receive a broadcast.

2. Select “No.19 RF AGC” of the PICTURE MODE.

3. Press the MUTING key and turn off color.

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

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

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

7. Press the MUTING key and get color out.

"

SET VIDEO STATUS to “STANDARD”

1. Receive a crosshatch signal.

2. While looking at the screen, 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.

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.

20

No. 51782

A

ADJUSTMENT OF DEFLECTION CIRCUIT

Item

V.CENTER,
V.SIZE and
V.POSITION
adjustment

Measuring

instrument
Signal
generator

Screen size 92%

Test point Adjustment part Description

No.14 V SIZE
No.15 V CENTER
V.CENTER SW

(S1421)

V-32220

1. Receive a crosshatch signal.

2. Make sure that the “No.15 V CENTER” of the PICTURE
SERVICE MODE is 0.

3. Use the LEFT/RIGHT keys of the MENU to set the initial
setting value for the No.14 V SIZE.

4. Adjust the vertical SCREEN size to 92% with the No.14 V SIZE
and V.CENTER SW (S1421).

Note:

Bottom of the screen is to be located within the “85%～95%”
range.

Screen
size

92%

H.WIDTH,
SIDEPIN
CORRECT and
H.POSITION
Adjustment

Picture size

Signal
generator

(100%)

Picture
size

(100%)

No.16 H POSITION
SIDEPIN CORRECT

VR
H.WIDT H VR

1. Receive a crosshatch signal.

2. Adjust the SIDEPIN CORRECT. VR so that vertical lines at
both side of the crosshatch are straight.

3. Select the “No.16 H POSITION” of the PICTURE SERVICE
MODE.

4. Press the LEFT/RIGHT keys of the MENU to set the initial
setting values for the “No.16 H POSITION”.

5. Adjust the “No.16 H POSITION” until the screen will be
horizontally centered.

6. Adjust the H.WIDTH VR so that 92% of the overall c rosshatch
is displayed on the screen.

7. As required, repeat above steps 2 and 6.

No. 51782

21

A

V-32220

ADJUSTMENT OF VIDEO / CHROMA CIRCUIT

Item

WHITE
BALANCE
(Low Light)
adjustment

Measuring

instrument
Signal
generator

[LOW LIGHT] MODE

R CUTOFF

BRIGHT

*** *** ***

Test point Adjustment part Description

BRIGHT
R CUTOFF

G CUTOFF
B CUTOFF

SCREEN VR
[ In HVT]

G CUTOFF

BRIGHT

***

B CUTOFF

1. Receive a black-and-white signal. (Color off)

2. Select the [LOW LIGHT] MODE from the SERVICE MENU.

3. Set the initial setting value of “BRIGHT” is 64. with the
LEFT/RIGHT key of the remote control unit.

4. Set the initial setting value of “R CUTOFF”, “G CUTOFF” and

④④④④

“B CUTOFF” is 20. with the

⑨⑨⑨⑨

to

keys of the remote

control unit.

5. Display a single horizontal li ne by pressing the

①①①①

key of the

remote control unit.

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

7. Turn the screen VR gradually to the right from the left until
either one of the red, blue or green colors appears faintly.

8. Adjust the two colors which did not appear until the single
horizontal line that is displayed becomes white using the

⑨⑨⑨⑨

keys of the remote control unit.

④④④④

9. Turn the screen VR until the single horizontal line is displayed
faintly.

10. Press the

The

!

②②②②

key to return to the regular screen.

③③③③

EXIT key is the cancel key for the WHITE BALANCE.

to

Remote Control Unit

H.LINE ON

R CUTOFF

4 5

R CUTOFF

7 8

H.LINE OFF

1 2

G CUTOFF

G CUTOFF

EXIT

3

B CUTOFF

6

B CUTOFF

9

22

No. 51782

A

V-32220

Item

WHITE
BALANCE
(High Light)
adjustment

Measuring

Test point Adjustment part Description

instrument
Signal
generator

[HIGH LIGHT] MODE

G DRIVE

Remote Control Unit

H.LINE ON

1 2

4 5

HIGH LIGHT

*** ***

H.LINE OFF

G DRIVE

G DRIVE

G DRIVE
B DRIVE

B DRIVE

EXIT

3

B DRIVE

6

B DRIVE

1. Receive a black-and-white signal. (Color off)

2. Select the [HIGH LIGHT] MODE in the SERVICE MENU.

3. Set the initi al setting value of “G DRIVE” and “B DRIVE” with

⑤⑤⑤⑤, ⑥⑥⑥⑥, ⑧⑧⑧⑧

the

4. A djust the screen until it becomes white using the

⑨⑨⑨⑨

keys of the remote control unit.

and

③③③③

The

!

EXIT ke y is the cancel key fo r the WHITE BALANCE.

⑨⑨⑨⑨

and

keys of the remote control unit.

⑤⑤⑤⑤, ⑥⑥⑥⑥, ⑧⑧⑧⑧

SUB BRIG HT
adjustment

SUB
CONTRAST
adjustment

7 8

Remote
control unit

Remote
control unit

9

No.1 BRIGHT

No.2 PICTURE

1. Receive a broadcast.

2. Select “No.1 BRIGHT” of the PICTURE MODE.

3. Set the initial setting value of the “No.1 BRIGHT” with the
LEFT/RIGHT key of the MENU.

4. If the brightness is not the best with the initial setting value,
make fine adjustment of the “No.1 BRIGHT” until you get the
optimum brightness.

1. Receive a broadcast.

2. Select “No.2 PICTURE” of the PICTURE MODE.

3. Set the initial setting value of the “No.2 PICTURE” with the
LEFT/RIGHT key of the MENU.

4. If the contrast is not the best with the initial setting value, make
fine adjustment of the “No.2 PICTURE” until you get the
optimum contrast.

No. 51782

23

A

V-32220

y

g

( )

(+)

y

( )

(+)

Item

SUB COLOR
adjustment

SUB TINT
adjustment

Measuring
instrument

Signal
generator
Oscilloscope
Remote
control unit

Y

C

W

Signal
generator
Oscilloscope
Remote
control unit

Test point Adjustment part Description

TP-B

####

TP-E(
[CRT
SOCKET
PWB]

No.7 COLOR

)

[ Method of adjustment without measuring instrument ]

1. Receive a broadcast.

2. Select “No.7 COLOR” of the PICTURE MODE.

3. Set the initial setting value of the “No.7 COLOR” with the
LEFT/RIGHT key of the MENU.

4. If the color is not the best with the Initial setting value, make
fine adjustment of the “No.7 COLOR” until you get the optimum
color.

G

R

[ Method of adjustment using measuring instrument ]

1. Input the full field color bar signal (75% white).

2. Select “No.7 COLOR” to the PICTURE MODE.

3. Set the initial setting value of the “No.7. COLOR” with the
LEFT/RIGHT key of the MENU.

4. Connect the oscilloscope between TP-B and TP-E.

5. Adjust COLOR and bring the value of
the voltage

+3V

(V

[ Method of adjustment without measuring instrument ]

1. Receive a broadcast.

2. Select “No.6 TINT” of the PICTURE MODE.

3. Set the initial setting value of the “No.6 TINT” with the
LEFT/RIGHT key of the MENU.

M

TP-B
TP-E(
[CRT
SOCKET
PWB]

(A)

0V

B

No.6 TINT

####

)

4. If the tint is not the best with the ini tial sett ing value, m ake f ine
adjustment of the “No.6 TINT” until you get the optimum tint.

W-B

in the illustration to

(A)

).

W

[ Method of adjustment using measuring instrument ]

1. Input the full field color bar signal (75% white).

Y

G

R

2. Select “No.6 TINT” to the PICTURE MODE.

3. Set the initial setting value of the “No.6 TINT” with the
LEFT/RIGHT key to the MENU.

4. Connect the oscilloscope between TP-B and TP-E.

5. Adjust TINT and bring the value of
voltage

C

Mg

B

0V

-5V

(V

W-Mg

).

in the illustration to the

(B)

(B)

24

No. 51782

A

ADJUSTMENT OF MTS CIRCUIT

Item

MTS INPUT
LEVEL
check

Measuring

instrument

Test point Adjustment part Description

No.4 IN LEVEL

V-32220

1. Select the “No.4 IN LEVEL” of the SOUND MODE.

2. Verify that the “No.4 IN LEVEL” is set at its initial setting value.

MTS STEREO
VCO
adjustment

Signal
generator

Frequency
counter

【【【【

】】】】

MPX

Connector

【【【【2】】】】

pin RTV

[AV
SELECTOR
PWB]

No.5 FH MONITOR
No.6 STEREO VCO

1. Receive a RF signal (nonmodulated sound signal) from the
antenna terminal.

2. Select the “No.5 FH MONITOR” of SOUND MODE, and
change the setting value from 0 to 1.

3. Connect the Frequency Counter to pin【2】of【MPX】connector.

4. Select the “No.6 STEREO VCO”.

5. Set the initial setting value of the “No.6 STEREO VCO” with the
LEFT/RIGHT key of the menu.

6. Adjust the “No.6 STEREO VCO” so that the Frequency
Counter will display 15.73kHz±0.1kHz.

7. Select the “No.5 FH MONITOR” of the SOUND MODE, and
reset the setting value from 1 to 0.

No. 51782

25

A

V-32220

Item

MTS SAP
VCO
adjustment

MTS FILTER
check

Measuring

instrument
Signal
generator

Frequency
counter

Test point Adjustment part Description

【【【【

】】】】

MPX

Connector

【【【【4】】】】

pin SDA

【【【【3】】】】

pin GND

【【【【2】】】】

pin RTV
[AV
SELECTOR
PWB]

No.11 5FH MON.

No.12 SAP VCO

No.8 FILTER

1. Receive a RF signal (non-modulated sound signal) from the
antenna terminal.

2. Connect between pin【4】of【MPX】connector and GND (Pin

【3】of【

3. Select the “No.11 5FH MON.” of the SOUND MODE, and reset
the1 setting value from 0 to 1.

4. Connect the Frequency counter to pin【2】(R.OUT) of【MPX
connector.

5. Select the “No.12 SAP VCO”.

6. Set the initial setting value of “No.12 SAP VCO” with the
LEFT/RIGHT key of the menu.

7. Adjust the “No.12 SAP VCO” so that t he Frequency Counter
will display 78.67kHz±0.5kHz.

8. Select the “No.11 5FH MON.” of the SOUND MODE, and reset
the setting value from 1 to 0.

1. Select the “No.8 FILTER” of the SOUND MODE.

2. Verify that the “No.8 FILTER” is set at its initial setting value.

MPX】connector) through 1MΩ Resistor.

】

MTS
SEPARATION
adjustment

L-Channel
signal waveform

1 cycle

TV audio
multiplex
signal
generator

Oscilloscope

【【【【

】】】】

MPX

Connector

【【【【1】】】】

pin LTV

【【【【2】】】】

pin RTV
[AV
SELECTOR
PWB]

R-Channel
crosstalk portion

Minimum

No.9 LOW SEP.

No.10 HI SEP.

Menu “MTS” is set to “STEREO”.

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

2. Connect an oscilloscope to pin
connector, and display one cycle portion of the 300Hz signal.

3. Change the connection of the oscilloscope to pin

【【【【

of

4. Select the “No.9 LOW SEP.” of the SOUND MODE.

5. Set the initial setting value of the “No.9 LOW SEP.” with the
LEFT/RIGHT key of the menu.

6. Adjust the “No.9 LOW SEP.” so that the stroke element of the
300Hz signal will become minimum.

7. Change the signal to 3kHz, and similarly adjust t he “No.10 HI
SEP.”.

】】】】

MPX

connector, and enlarge the voltage axis.

【【【【1】】】】

(L OUT) of

【【【【2】】】】

【【【【

MPX

(R OUT)

】】】】

26

No. 51782

A

PURITY, CONVERGENCE

(

)

PURITY ADJUSTMENT

1. Demagnetize CRT with the demagnetizer.

V-32220

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 t he 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.

%

P/C MAGNETS

CRT

WEDGE

DEFLECTION

YOKE

P

46

P / C

MAGNETS

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

(convergence magnets)
(convergence magnets)

Fig.1

PURITY MAGNETS

10. Input a crosshatch signal.

11. Verify that the screen is horizontal.

12. Input red and blue raster signals, and m ake 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. 51782

27

A

V-32220

(

)

(

)

(

)

(

)

)R(B)

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 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.

FRONT VIEW

FRONT VIEW

BLUE

GREEN

RED

RED

Fig.1

GREEN

BLUE

RED

GREEN

BLUE

After adjustment, fix the wedge at the original position.

""""

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

[With differential coil if available]

If the lines are not aligned, as shown in Fig. 4, correct them with

""""

the differential coil attached to the deflection yoke.

FRONT VIEW

B(R

G

FRONT VIEW

GREEN

RED

BLUE

BLUE

GREEN RED

Fig.2

BLUE

Fig.3

GREEN

RED

RED
GREEN
BLUE

BLUE
GREEN

RED

Fig.4

28

No. 51782

A

SELF CHECK FUNCTIONS

1. Outline

This model has self check functions given below. When a malfunction has been detected, the POWER is turned off and the LED flashes to

inform of the failure . The malfunction is detected by the signal input state of the control line connected to the microcomputer.

2. Self check items

Check item Details of detection Method of detection State of malfunction

V-32220

Over-current protection
(HAZARD)

Operation of B1 protector
circuit.

3. Self check indicating function

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

[ON-TIMER LED indication]

The ON-TIMER LED flashes at 0.5 seconds intervals.

The microcomputer detects at 1
second intervals.

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

POWER
Supplied

After about
5 seconds

Start of
detection

When a malfunction has been
detected, the POWER is turned
off. While the POWER is being
turned off , the power key of the
remote controller is not operational
until the power code is taken out
and put in again.

Malfunction
is detected

POWER OFF
Flashing

ON-TIMER LED

No. 51782

29

A

V-32220

HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT

1. HIGH VOLTAGE HOLD DOWN CIRCUIT

After repairing the high voltage hold down circuit 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 cord, make sure that the normal picture is displayed on the screen.

T901

D922

C926

RY921

IC701

Power

ON/OFF

R933

Q927

Q922

D921

Q944

D560

D561

32

Q924

R560

R561

IC201
H.OUT

C924

Q542

Q521

R558

26

B1

Q923

Q541

H-Vcc

R559

C551

D551

T521

R557

R544

Q531

CONNECTOR

X

D544

T522

4

HV

10

9

3

2 1

R556

C544

Fig.1

RESISTOR

D551

18.9k

ΩΩΩΩ±±±±94ΩΩΩΩ

3 2 1

1/4W

X

CONNECTOR

R544

D544

R556

R557

C544

Fig.2

30

No. 51782

JVC SERVICE & ENGINEERING COMPANY OF AMERICA

DIVISION OF JVC AMERICAS CORP.

Head office
East Coast

Midwest
West Coast
Southwest
Hawaii
Southeast

: 1700 Valley Road, Wayne, New Jersey 07470 [phone]
: 10 New Maple Avenue, Pine Brook, New Jersey 07058 [phone]
: 705 Enterprise St. Aurora, Illinois 605 04 [phone]
: 5665 Corporate Avenue, Cypress, California 90630 [phone]
: 10700 Hammerly, Suite 105, Houston,Texas 77043 [phone]
: 2969 Mapunapuna Place, Honolulu, Hawaii 96819 [phone]
: 1500 Lakes Parkway, Lawrenceville, Georgia 30243 [phone]

JVC CANADA INC.

Head office
Vancouver

%

: 21 Finchdene Square Scarborough, Ontario M1X 1A7 [phone]
: 13040 Worster Court Richmond B.C. V6V 2B3 [phone]

4

AV32220G-UCM #4

AV32220H-UCM #999

AV32220M-UCM #999

VP 0101
DP3051