JVC AV28L2EUBL, AV28L2EUGR, AV28L2EUGY Service Manual

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SER VICE MANUAL

COLOUR TELEVISION

V28L2EUG

V28L2EUBL

V28L2EUG

BASIC CHASSIS

AV28L2EUGR
AV28L2EUBL
AV28L2EUGY

MF

CONTENTS

SPECIFICATIONS

!

SAFETY PRECAUTIONS

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FEATURES

!

MAIN DIFFERENCE LIST

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SPECIFIC SERVICE INSTRUCTIONS

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SERVICE ADJUSTMENTS

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PARTS LIST

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★

OPERATING INSTRUCTIONS

★

STANDARD CIRCUIT DIAGRAM

1

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COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.

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

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････････････････････････････････ ････

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31

2-1

No.51778
May. 2001

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V28L2EUGR

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V28L2EUBL
V28L2EUG

SPECIFICATIONS

Item Content

Dimensions ( W
Mass
TV RF System
Colour System

Stereo System
Teletext System

Receiving Frequency

Intermediate Frequency

Colour Sub Carrier Freq.

Power Input
Power Consumption

Aerial Input Term
Picture Tube
High Voltage

Speaker
Audio Output

EXT-1/EXT-2/EXT-3 (IN/OUT)
EXT-4 (Input) Video

D )

××××H××××

VIF Carrier
SIF Carrier

SECAM

Audio(L/R)

S / Video

VHF
UHF

PAL

NTSC

800mm×500mm×498mm

41.0kg
CCIR ( B/G, D/K, L, L’, I )
PAL / SECAM / NTSC (Only in EXT mode)

A2 (B/G, D/K) / NICAM (B/G, I, D/K, L)
Fastext (UK system) / TOP (German system)

WST(Standard system)

47MHz ～ 470MHz
470MHz ～ 862MHz

French cable TV channel of broadcast frequencies 116～172MHz & 220～469MHz

!

38.9MHz (B/G, D/K, I, L) / 33.95MHz (L’)

33.4MHz (5.5MHz : B/G)

32.9MHz (6.0MHz : I ) / 32.4MHz (6.5MHz : L, D/K) / 40.45MHz (6.5MHz : L’)

4.43MHz

4.40 625MHz / 4.25MHz

3.58MHz / 4.43MHz
AC 220V～240V , 50Hz
183W(Max) / 127W(Avg),
75Ωunbalanced, Coaxial

Visible size : 66cm, Measured diagonally

+

31.0kV (at zero beam current)
20cm×4cm, Oval type×2 with BOX

7.5W + 7.5W
21-pin Euro connector (SCART socket)×3

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

Y : 1Vp-p POSITIVE (Negative sync Provided, when terminated with 75Ω)
C : 0.3Vp-p (Burst signal, when terminated with 75Ω)

1.0kV

-1.5kV

AUDIO OUT (Variable)

Headphone jack
Remote Control Unit

0～1Vrms, Low Impedance (RCA pin jack×2)

Stereo mini jack (φ3.5mm )
RM-C54 (AAA/R03 dry cell battery×2)

Design & specifications are subject to change without notice

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No.51778

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21-pin Euro connector (SCART socket) : EXT-1 / EXT-2 / EXT-3

(P-P= Peak to Peak, B -W= Bl ank ing to white peak)

Pin

Signal Designation Matching Value EXT-1 EXT-2 EXT-3

No.

1 AUDIO R output 500mVrms(Nominal),

Low impedance

2 AUDIO R input 500mVrms(Nominal),

High impedance

3 AUDIO L output 500mVrms(Nominal),

Low impedance

4 AUDIO GND
5 GND (B)
6 AUDIO L input 500mVrms(Nominal),

High impedance

7B input
8 FUNCTON SW

(SLOW SW)

9 GND (G)
10 SCL3 NC
11 G input
12 SDA3 NC
13 GND (R)
14 GND (YS)
15 R / C input

16 Ys input
17 GND(VIDEO output)
18 GND(VIDEO input)
19 VIDEO out pu t

20 VIDEO / Y input
21 COMMON GND

700mV
Low : 0-3V, High : 8-12V, High

impedance

700mV

R : 700mV
C : 300mV
Low : 0 - 0.4, High : 1 - 3V, 75

1V

1V

, 75

Ω○○

B-W

, 75

Ω○○

B-W

, 75

Ω

B-W

, 75

Ω

P-P

(Neg ati ve g oin g s ync ) , 75

P-P

(Neg ati ve g oin g s ync ) , 75

P-P

Ω○ ○

Ω○

Ω○ ○ ○

○

(TV OUT)

○○○

○

(TV OUT)

○○○

○○○

○○○

○○○

○○○

○○○

○○

○

(only R)

○○○

○○○

(TV)

○○○

○

(LINE OUT)

○

(LINE OUT)

○

○

○○

○

(LINE OUT)

V28L2EUG

V28L2EUBL

V28L2EUG

NC

NC

NC

NC
NC
NC

NC

(only C)

NC

NC

Pin assignment

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No.51778

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V28L2EUGR

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V28L2EUBL
V28L2EUG

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
manuf act urer's warr anty and will fur t her reliev e the manuf actur er
of responsi bility f or person al injury or pr operty dam age res ulting
therefrom.

3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These char acteristics are
often not evident f rom visual i nspection nor can t he protect ion
afford ed by them n ecess arily be obt ained by using rep lacem ent
compon ents rated f or higher voltag e, watt ag e, etc. R epl acem ent
parts which have these special safety characteristics are
identified in the parts list of Service manual.

compon ents hav in g su ch feat ures are id entif ied by s hadin g
on the sche matics and by (
manual.

have the same safety characteristics as the recommended
replac ement part shown i n the p arts list of S ervic e manu al may
cause shock, fire, or other hazards.

The us e of a subst itute replacement which does not

) on the parts list in Service

!!!!

Electrical

4.

Don't short b etween the LIV E side groun d 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 th e GND is sh own by the LI VE : (") side GND, the
ISOLATED(NEUTRAL ) : (#) side GND and EARTH : ($) side
GND. Don't short between the LIVE side GND and
ISOLATED(NEUTRAL) side GND or EARTH side GND and
never meas ure with a measuri ng apparatus (osc illoscope etc .)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the same time.
If above not e wi ll n ot be kept, a fuse or any parts w ill be broken.

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

6. The hig h voltage app lied t o the picture t ube must c onform wit h
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
voltag e conditions s hould b e kept to a mi nimum, or sh ould be
prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect inst allation, cracked or m elted high voltage harness,
poor solderi ng, etc.). To maintain the pr oper minimum le vel of
soft X-Ray emission, components in the high voltage circuitr y
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
pictur e tube bef ore attempting met er connect ion, by connecting
a clip l ead to th e g roun d fr am e and c on necti ng t h e oth er end of
the lead through a 10k" 2W resistor t o the an ode button .

8. W hen servic e is requir ed, obser ve the origin al lead dress . Extr a
precaut ion shou ld be gi ven to assure c orrect l ead dr ess in t he
high voltage circuit area. W here a short circuit has occurred,
those comp onents that in dicat e evidenc e of over heating should
be replaced. Always use the manufacturer's replacement
components.

9.

Isolation Check
(Saf ety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation
check on the exposed metal parts of the cabinet (antenna
termin als , vid eo/ au dio inpu t an d output term inals, Con t r ol kn obs,
metal c abinet, s crewhead s, earph one j ack, contr ol shafts, etc.)
to be sure the product is safe to operate without danger of
electrical shock.

(1)

Dielectric Stren g th Test

The isol ation b etween th e AC pr imar y circuit and all metal parts
expos ed t o th e user, p ar tic u larly any exp osed met al part h avi ng a
return p ath to the chassis should withst and a voltage of 3000V
AC (r.m.s .) for a peri od of on e s ec ond.

(. . . . W ithstand a voltag e of 1100 V AC ( r.m.s.) to an applianc e

rated up t o 120V, and 3000 V AC (r. m.s.) t o an appl iance r ated
200V or mor e, f or a peri od of on e s ec on d.)
This method of test requires a test equipment not generally found
in the service trade.

(2)

Leak age Current Check

Plug the AC lin e c or d dir ec t l y int o t he AC outl et (do not us e a lin e
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. ). An y leak age c urr ent mus t 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 lin e c or d dir ec t l y int o t he AC outl et (do not us e a lin e
isolati on transform er during t his check. ). Use an AC voltmet er
having 1000 ohms per volt or more sensitivity in the following
manner. Connect a 1 500" 10W resistor paralleled by a 0.15#F
AC-typ e capacitor betw een an expos ed metal part and a know n
good earth ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the resistor
connect ion t o each exp os ed met al p art, part icul arl y any exp osed
metal part h avin g a return p ath to th e chassis , and meas ure th e
AC voltag e across the res istor. N ow, re vers e 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 , i n t ropic al area, this m us t n ot exceed 0. 3 V A C (r. m.s .).
This corresponds to 0.2mA AC (r.m.s.).

0.15μF AC-TYPE

1500

GOOD EARTH GROUND

"

AC VOLTMETER
(HAVING 1000
OR MORE SENSITIVITY)

10W

"

/V,

PLACE THIS PROBE
ON EACH EXPOSED
METAL PART

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No.51778

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FEATURES

V28L2EUG

V28L2EUBL

V28L2EUG

New chassis design enable use of an interactive on screen

"

control.

The TELETEXT SYSTE M has a built-i n FAST EXT ( UK s ystem),

"

TOP (German system) and WST (world standard system)
system.

Pure FLAT CRT reproduce fine textured.

"

Digi Pure pro : Auto digi pure with motion picture compensation.

"

B ecause this TV uni t corresp onds t o multipl ex broadc ast, us ers

"

can enjo y music pr ograms an d spor ting ev ents wit h live real ism.
In additi on, BILINGUAL programs c an be heard in their original
language.

Built-in ECO (ECONOMY, ECOLOGY) MODE.

"

In accordance with the brightness in a room, the brightness
and/or contrast of the picture can be adjusted automatically to
make th e opti mu m pictur e wh ic h is eas y on th e ey e.

TV EXT-1 EXT-3

Users can make VCR dubbing of picture and sound by controlling

"

the AV select or to sel ect an opti onal sour ce at the E XT-2 output
shown in figure.

EXT-4

EXT-2

MAIN DIFFERENCE LIST

Model name

!!!!

Part name

FRONT FRAME LC11007-001B-U LC11007-002B-U LC11007-003A-U

!

RATING LABEL

!

EURO LABEL AEM1052-017-E AEM1052-014-E AEM1052-071-E

AV28L2EUGR AV28L2EUBL AV28L2EUGY

LC20380-008A-U
LC20379-008A-U

LC20380-012A-U
LC20379-012A-U

LC20380-023A-U
LC20379-019A-U

No.51778

5

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V28L2EUGR

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V28L2EUBL
V28L2EUG

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

REMOVING THE REAR COVER

1. Unplug the power cord.

2. Remove the 11 screws marked ”A” as shown in the Fig. 1.

3. Withdraw the rear cover toward you.

REMOVING THE SIDE C ON TRO L JACK ASSEMBLY

After removing the rear cover.

"

1. Remove the sc r ew m ark ed B as shown in the Fig.1.

2. While slight l y r aise the side control jack assembl y, remo ve th e 2
claws under the side control jack assembly.

3. Disconnect t he c onn ector “SR”, “SL”, “S”, “F” and “K” as shown
in Fig 2.

REMOVING THE SIDE CONTROL PWB

After removing the rear cover and side control jack assembly.

"

1. R emove the 3 c laws “C” f rom b ack s i d e of t h e s i d e co n tro l j ac k
assembly as shown in Fig.2.

2. Pull out the SIDE CONTROL PWB.

REMOVING THE CHASSIS

After removing the rear cover.

"

1. Slightly rais e the b ot h sid es of the c hass is b y h and and r em ove
the two c laws und er th e both s id es of the c has sis from the f r ont
cabinet.

2. Withdraw the chassis backward.
(If necessary, take off the wire clamp, connectors etc.)

REMOVING THE SPEAKER BOX

After removing the rear cover.

"

1. Remove the 2 screws marked ”D” as shown in Fig. 1.

: W hen removing t he screws marked D of th e speaker b ox

NOTE

assembly, remove the lower side screw first, and then
remove the upper one.

2. Remove the 2 screws “E” attaching the speaker box.

3. Remove the 2 screws “F” attaching the speaker.

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

CHECKING THE PW BOARD

To check the back side of the PW Board.

1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).

2) Erect t he ch assis vertic ally s o that you c an easi ly ch eck th e
back side of the PW Board.

[CAUTION]

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

"

co n tac ti ng wit h oth e r PW B o ard .

Before turning on power, make sure that the wire connector is

"

properly connected.

When conducting a check with power supplied, be sure to confirm

"

that the CRT EARTH WIRE (BRAID ED ASS’Y) is conn ected to
the CRT SOCKET PW board.

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 inad ver tent l y remov ed, b e sur e to ti e th e wir es with
a new cable tie.

Connector

SR
SL
S

F

K

(Back view)

Fig. 2

C

SIDE CONTROL
PWB

C

REMOVING THE AV TERMINAL BOARD

After removing the rear cover.

"

1. Remove the 3 screws marked ”G” as shown in the Fig. 1.

2. Remove the 2 cl aws mark ed “H” under the CH ASSIS as sh own
in Fig. 3.

3. Remove th e AV TERMIN AL BOARD slig htly in the direc tion of
arrow ”I” as shown in Fi g. 3.

6

No.51778

V TERMINAL

BOARD

I

H

H

AV SW PWB

Fig. 3

A

R

A

A

Y

A

D

A

V28L2EUG

V28L2EUBL

V28L2EUG

SPEAKER

FRONT CABINET

Fig. 2

F

SPEAKER

CRT
SOCKET
PWB

FRONT
CONTROL
PWB

CONTROL

B

BASE

CLAW

MICON
PWB

CLAW

100Hz

PWB

D

F

V SW

PWB

MAIN PWB

BOX

E

POWER &
DEF. P WB

CHASSIS

V TERMINAL

BOARD

G

(×3)

E

SIDE
CONTROL
JACK
ASSEMBLY

SPEAKER

SPEAKER
BOX

REAR COVER

Fig. 1

A

POWER CORD

(×11)

No.51778

7

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V28L2EUG

REMOVING THE CRT

Replacement of the CRT should be performed by 2 or more

$

persons.

After removing the 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.4).

2. While keeping the surface of CRT down, mount the TV set on the

CRT change table balanced will as shown in Fig.5.

3. Remove 4 scr ews m ar k ed b y arrows with a box typ e sc r ew driver

as shown in Fig.5.

Since the cabi n et wi ll drop wh en s c rews have been rem o ved , be

!

sure to support the cabinet with hands.

4. After 4 sc rews have been removed, put th e cabinet sl owly on

cloth (At this time, be carefully so as not to damage the front
surface of the cabinet) shown in Fig.6.

The CRT should be assembled according to the opposite

!

sequence of its dis m oun ti ng steps.

T he CRT ch ang e t ab l e shoul d preferab ly be smaller th at th e CRT

$

surfac e, and its heig ht b e ab out 35cm.

About CRT Spacer

$

An appropriat e C R T s p ac er s h ou ld be used in the corres p on di ng
CRT in accordance with th e type of the CRT.
When a CRT is repl ac ed, s peci al att enti on s houl d be p aid to t his
matter.

CRT CHANGE TABLE

PPROX.

35cm

CLOTH

Fig. 4

COAT ING OF SILICON GREASE FO R ELECTRICAL
INSULATION ON THE CRT ANODE CAP SECTION.

Subsequ ent to rep lacemen t of t he CRT and HV transf ormer or

!

repair of the anode c ap, etc. by dismou nting them, be sure to
coat silicon greas e f or el ec trical insulati on as sh own in F i g. 7.
Wipe around the anode button with clean and dry cloth. (Fig.7)
Coat sil icon gr eas e on t he s ection arou nd the anod e but ton. A t
this ti me, t ak e c are s o th at an y si lic on gr eas es d os e not s tic k to
the anode button. (Fig.8)

Silicon grease product No. KS - 650N

★★★★

CRT

node button

Silicon gr ease

coating

CABINET

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

node button
(No sticking of
silicon grease)

Fig. 5

CRT

CRT
CHANGE TABLE

Fig. 6

Silicon gr ease
should b e c oat ed
by 5mm or mor e
from the outside
diamet er of
anode cap.

Coating positi on
of silicon grease

node cap

Fig. 7 Fig. 8

8

No. 51778

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Y

REPLACEMENT OF MEMORY ICs

1. Memory ICs

This TV use mem ory ICs . In the mem or y ICs, there ar e memor iz ed dat a
for cor rectl y op er ating th e vi deo an d def l ection cir cu its. W h en r epl acing
memory ICs, be sure to use ICs written with the initial values of data.

2. Procedure for replacing memory ICs

PROCEDURE

(1)

Power off

Switch th e p ow er off and unpl ug the p ow er c ord from the w all ou tl et.

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. STATUS

7. PIP 8.

9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT : EXITi

Fig.1

V28L2EUG

V28L2EUBL

V28L2EUG

(2)

Replace ICs

.

Be sure to use memory ICs 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 set SYSTEM CONSTANT SET:

It must not adjust with ou t sign al.

****

1) Press the INFORMATION key and the MUTING key of the
REMOTE CONTROL UNIT simultaneously.

2) T he SERVICE MEN U scr een of F ig . 1 wil l b e dis pl ayed.

3) While the SERVICE MENU is displayed, press the
INFORM ATION key and MUT ING key s imultan eousl y, and th e
SYSTEM CONSTANT SET screen of Fig. 2 wi ll b e dis pl ay ed.

4) Ch eck t he s etti ng valu es of th e SY STE M CON STA NT S ET of
Table 1. If the valu e is dif f erent , s elect the s et ting item wi th th e
FUNCTION UP/DOWN key, and set th e correct value with the
FUNCTION -/+ key.

5) Press the MENU(OK) key to memorize the setting value.

6) Press the INFORMATION key, and return to the normal screen.

(5)

Setting o f re ce iv e channel s

Set the receive channel.
For setting, refer to the OPERATING INSTRUCTIONS.

(6)

Setting of SERVICE MENU

Verif y the s etting items of th e

SERVICE MENU

wh ere neces sary .
For setting, refer to the SERVICE ADJUSTMENTS.

of Table 2, and reset

SYSTEM CONSTANT SET

1. DESTINATION EU

OK

+ : STORE : EXIT

i

Fig.2

2. CRT TYPE 16 : 9

3. PURITY NO

4. PICTURE TILT YES

5. DIGIPURE PRO YES

6. PIP NO

7. PIC & TEXT YES

8. DOLBY NO

9. BBE YES

10. PROGRESSIVE YES

11. TDA9178 YES

12. TONE IC NO

13. FLAT YES

NAME OF REMOTE CONTROL KEY

Names of key

INFORMATION

key

iiii

MUTING

MENU

OK

(7)

User setti n gs

Check th e us er s ett in g values of T abl e 3, and if setti ng v al ue is
different, set the correct value.

FUNCTION UP/DOWN

▼

▼

For setting, refer to the OPERATING INSTRUCTIONS.

▼

TV

▼

+

9

FUNCTION -/+

TV

No. 51778

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SETTIN G VALUES OF SYSTEM CONSTANT SET (TABLE 1)

Setting item Setting content Setting value

1. DESTINATION EU

2. CRT TY P E 16 : 9

3. PURITY NO

4. PICTURE TILT YES

5. DIGIPURE PRO YES

6. PIP NO

7. PIC & TEXT YES

8. DOLBY NO

9. BBE YES

10. PROGRESSIVE YES

11. TDA9178 YES

12. TONE IC NO

13. FLAT YES

EK EU EI

16 : 9 4 : 3

YES NO

YES NO

YES NO

1 TUNER

YES NO

YES NO

YES NO

YES NO

YES NO

YES NO

YES NO

2 TUNER

NO

SERVICE MENU SETTING ITEMS (TABLE 2)

Setting item Setting value Setting item Setting value

1. IF 1. VCO 4. DEF. 1. V-SHIFT

2. V-SIZE

3. H-CENT

4. H-SIZE

5. TRAPEZ

2. V / C 1. RGB BLK

2. WDR R

3. WDR G

4. WDR B

5. BRIGHT

6. CONTRAST

7. COLOUR

8. HUE

9. SHARP

10. VCO ADJUSTMENT

11. VIDEO AGC

12. SYNC SLICE

5. VSM PRESET
COOL
NORMAL
WARM

6. EW-PIN

7. COR-PIN

8. COR-UP

9. COR-LO

10. ANGLE

11. BOW

12. V-S.CR

13. V.LIN

1. CONT.

2. BRIGHT

3. SHARP

4. COLOUR

5. HUE

6. WDR R

7. WDR G

8. WDR B

3. AUDIO

(Do not adjust)

10

1. ERR LIMIT

2. A2 ID THR

6. STATUS

No. 51778

(Do not adjust)

VPS
PDC

A

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USER SETTING VALUES (TABLE 3)

Setting item Setting value Setting item Setting value

SUB POWER ON VOLUME Appropriate sound volume

SHIPPING CHANNEL PR1 DISPLAY INDICATED

V28L2EUG

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PRESET CHANNEL

PICTURE SETTING EXT SETTING

TINT
CONTRAST
BRIGHT
SHARP
COLOUR
ECO MODE

PICTURE FEATURES FEATURES

DIGITAL VNR
DIGIPURE PRO
COLOUR SYSTEM

AUTO ASPECT

SOUND SETTING INSTALL

BASS
TREBLE
BALANCE
TV SPEAKER
HYPER SOUND
BBE

See ; OPERATING
INSTRUCTIONS.

COOL
REFER to VSM SETTING
REFER to VSM SETTING
REFER to VSM SETTING
REFER to VSM SETTING
OFF

AUTO
AUTO
TV : According to preset CH
EXT : AUTO
PANORAMIC

CENTER
CENTER
CENTER
L / R

OFF
ON

ZOOM MODE PANORAMIC

ID
DUBBING

SLEEP TIMER
BLUE BLACK
CHILD LOCK
DECODER (EXT-2)

LANGUAGE
EDIT

BLANK
EXT-1→EXT-2

OFF
ON
ID : No.0000, ALL CH : OFF
ALL CH : OFF

ENGLISH
PR CHANNEL ONLY
OTHERS : BLANK

No. 51778

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V28L2EUG

SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT

1.

There are 2 ways of adjusting this TV: One is with the
REMOTE CONTRO L UNIT and t he oth er is t he conv ention al
method using adjustment parts a nd components.

2.

The setting (adjustment) using the REMOTE CONTROL
UNIT is ma de on t he b asis of th e initi al se tting v alue s. The
setting values which adjust the screen to the optimum
condition can be different from the initial setting values.

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

4. Turn on the power of the TV and measuring instrument for
warming up for at least 30 minutes before starting adjustment.

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

6. N ever touc h parts ( suc h as vari able r esist ors, tr ansf ormers and
condens ers) not show n in the adj ustment i tems of this s ervice
adjustment.

7. Preparation for adjustment (presetting):
Unless oth erwise sp ecified in t he adjust ment items , preset t he
following functions with the REMOTE CONTROL UNIT:

Setting position

"

PICTURE MODE (VSM) NORMAL
SLEEP TIMER OFF
BALANCE CENTER
ECO OFF
ZOOM PANORAMIC

MEASURING INSTRUMENT AND FIXTURES

1. DC voltmeter (or digital voltmeter)

2. Oscilloscope

3. Signal generator (Pattern generato r) [PAL / SECAM / NTSC]

4. Remote control unit

ADJUSTMENT ITEMS

Checking items.

●

Adjustment of FOCUS.

●

VSM preset s etti ng.

●

VIDEO / CHROMA circuit adjustment.

●

DEFLECTION circuit adjustment.

●

AUDIO circuit adjustment.

●

(Do not adjust)

12

No. 51778

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ADJUSTMENT LOCATIONS

)

SIDE CONTROL PWB

TOP

V28L2EUG

V28L2EUBL

V28L2EUG

SR

FRONT

FRONT

FRONT CONTROL PWB

F901

PW

POWER SW

MAIN PWB POWER&DEF PWB

CN002

S

L

MICON PWB

AV SW PWB

CN006

TUNER

CN007

HEAD
PHONE

S-IN

E
X
T

CN102

W

4

SL

S

F

K

FRONT

W DEG

CN004

CN005

TOP

OUT

EXT 1 2 3

AUDIO

IN-OUT IN

CRT SOCKET PWB

TP-47G

TP-E

CN013

100Hz PWB

ANT IN

TP-47R

CN003

CN013

(SOLDER SIDE)

TP-47B

CN014

CN014

HV

HVT

FOCUS 1 VR
FOCUS 2 VR

SCREEN VR

X

1
5

1pin:B1(TP-91

2pin:NC
3pin:X-RAY
4pin:X-RAY
5pin:GND

CN006

C2

E1

No. 51778

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V28L2EUG

BASIC OPERATION SERVICE MENU

1. TOOL OF SERVICE MENU OPERATION

Operate the SERVICE MENU with the REMOTE CONTROL UNIT.

2. SERVICE MENU ITEMS

With the S ERVIC E MENU, vari ous s ettings (adjust ments ) can be made, and the y are br oadly c lassif ied in th e f ollowing items of settings
(adjustments):
(1)
(2)
(3)
(4)

1. IF

･･･････････････････････

2.V/C

･･････････････････････

3.AUDIO

4.DEF

･･･････････････････

･････････････････････

This mode adjusts the setting values of the IF circuit.
This mode adjusts the setting values of the VIDEO / CHROMA circuit.
This mode adjusts the s etting val u es of the multi pl ic it y SOUND circui t.
This mode adjusts the setting values of the DEFLECTION circuit for each aspect mode given below.

ASPECT V. FREQ.
FULL 100Hzi / 60HzP / 120Hzi
PANORAMIC
SUBTITLE

↑

↑

(5)

5.VSM PRESET

･････････････

This mod e adj us ts the initial s ett in g values of COO L,N OMAL an d W A RM.
(VSM : Video Status Memory)

3. BASIC OPERATION OF SERVICE MENU

(1)

How to enter SERVICE MENU

Press the INFORMATION key and the MUTING key of the
REMOTE CONTROL UNIT simultaneously, and the
SERVICE ME NU sc r een of Fi g. 1 wi ll b e dis pl ay ed.

(2)

Selection of SUB MENU SCREEN

Press one of keys 1～5 of the REMOTE CONTROL UNIT
and select the SUB MENU SCR EEN (See Fi g. 3), f orm the
SERVICE MENU.
SERVICE MENU → SUB MENU

1. IF

2. V / C

3. AUDIO

4. DEF.

5. VSM PRESET

6. STATUS

7. PIP

8. - - -

9. SHIPPING (OFF)

0. BUSS FRE E

DO NOT
WORK

SERVICE MENU

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. STATUS

7. PIP 8.

9. SHIPPING (OFF) 0. BUS FREE

1-9 : SELECT : EXI Ti

Fig.1

NAME OF REMOTE CONTROL KEY

Names of key

INFORMATION

MUTING

MENU

FUNCTION UP/DOWN

FUNCTION -/+

TV

key

iiii

OK

▼

▼

TV

▼

▼

+

Fig.2

14

No. 51778

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(

)

(**)

1. V-SHIFT

)

2. V-SIZE

3. H-CENT

4. H-SIZE

5. H-TRAPEZ

6. EW-PIN

7. COR-PIN

8. COR-UP

9. COR-LO

10. ANGLE

11. BOW

12. V-S.CR

13. V.LIN

SUB MENU 4. DE F

DEF FULL

1. V-SHIFT

: STORE i : EXIT

OK

- / +

SERVICE MENU

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. STATUS

7. PIP 8. - - -

9. SHIPPING
1-9 : SELECT i : EXIT

**

**

Hz

****

***

OFF)0. BUS FREE

IF SERVICE MENU

1. VCO

2. ATT ON/OFF

1-2 : SELECT i : EXIT

SUB MENU 1.IF (CW)

**

**....**

VCO (CW

MAIN
TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW

**

MHz

****

****

i : EXIT

V28L2EUG

V28L2EUBL

V28L2EUG

Do Not move.

COOL
NORMAL
WARM

1. CONT.

2. BRIGHT

3. SHARP

4. COLOUR

5. HUE

6. WDR R

7. WDR G

8. WDR B

SUB MENU 5. VSM PRESET

VSM PRESET NORMAL

1.CONT

- / +

: STORE i : EXIT

OK

***

Fig. 3 SUB MENU SCREEN

SUB MENU 2. V/C

PAL

V/C

1. RGB. BLK

- / +

SUB MENU 3. AUDIO (Do not adjust

- / +

: STORE i : EXIT

OK

AUDIO

1. ERR LIMIT 10H
C AD BITS =

: STORE i : EXIT

OK

****

********

1. RGB BLK

2. WDR R

3. WDR G

4. WDR B

5. BRIGHT

6. CONTRAST

7. COLOUR

8. HUE

9. SHARP

10.VCO ADJUSTMENT

11. VIDEO AGC

12. SYNC SLICE

1.ERR LIM IT

2. A2 ID THR

No. 51778

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V28L2EUG

(3)

Method of Setting

Method of Sett i ng

"

[VCO]

1 Key

①

1 Key

②

INFORMATION ( ) Key

③

1.IF

････････････････････････････ *

･････････････････････････

････････････････････････

i

･･････

It must not adjust without sig n al.
Select 1.IF.
Select 1. VC O (CW)
Check the arrow position between ABOVE REF. and BELOW REF.
Return to the SERVICE MENU screen.

Method of setting

"

5 Key

①2～

FUNCTION UP/DOWN Key

②

FUNCTION -/+

③

MENU (OK) Key

④

INFORMATION ( ) Key

⑤

Can not setting

"

(4)

Release of SERVICE MENU

1) After completing the setting, return to the SERVICE MENU, then again press the INFORMATION (OK) key.

2.V/C, 3.AUDIO, 4.DEF

･･････････････････････

･････

･････････････････

･･･････････････

i

6. STATUS, 7. PIP, 8. --- , 9. SHIPPING(ON) & 0. BUS FREE.

･･････

and

5.VSM PRESET.

Select on e from
Select setting items.
Set (adjust) the setting values of the setting items.
Memorize the setting value.
(Before storing the setting values in memory, do not press the CH, TV, POWER ON / OFF key -

if you do, the values will not be stored in memory.)
Return to the

2. V/C, 3. AUDIO, 4. DEF

SERVICE MENU

screen.

and

5. VSM PRESET

.

16

No. 51778

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ADJUSTMENT

)

CHECKING ITEM

V28L2EUG

V28L2EUBL

V28L2EUG

Item

Measuring

instrument

Check of B 1
Power Supply

Signal
Generator

DC voltmeter

Remote
Control unit

Check of Hi gh
Voltage

Signal
Generator

DC volunteer

Remote
Control unit

Check of VC O Remote

control unit

IF SERVICE MENU

1. VCO

2. ATT ON/OFF

Test point Adjustment part Descrip tion

TP-91(B1)
TP-E(

)

####

[X connector
on POWER
DEF P WB]

1. RGB BLK

1. Receive any br oad cast.

2. Press the ZOOM key and select the FULL mode.

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

4. Select 1. RGB BLK with function UP / DOWN key.

5. Pr ess the f uncti on +( ) key t o find t he cut off sc reen (B lack
screen).

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

7. Make sure that the voltage is DC139.9 ±2.0V.

8. Press the function – ( ) key to return to service menu.

CRT anode

1. RGB BLK

1. Receive any br oad cast.

2. Press the ZOOM key and select the FULL mode.

Chassis GND

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

4. Select 1. RGB BLK with function UP / DOWN key.

5. Pr ess the f uncti on +( ) key t o find t he cut off sc reen (B lack
screen).

6. Connect a DC voltmeter to CRT ANODE and chassis GND.

7. Make sure that the voltage is DC 31.0kV .

8. Press the function – ( ) key to return to service menu.

1. VCO

Under norm al c ond iti ons , no adjus t m ent is r equ ired.

"

Confirmation adjustment.

"

1. Select 1.IF from the SERVICE MENU.

2. Then select 1.VCO from the IF SERVICE MENU.

3. Receive any broadcast .

(Do not move)

4. Check the arrow ( ) p osition b etween the ABOVE R EF. and
BELOW REF.

+1kV

-1.5kV

1-2 : SELECT

TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW

VCO(CW

MAIN

i: EXIT

****

MHz

i : EXIT

No. 51778

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V28L2EUG

ADJUSTMENT OF FOCUS & SCREEN

Item

Adjustment of
FOCUS

HVT

Adjustment of
SCREEN VR

Measuring
instrument

Signal
generator

FOCUS 1 VR
FOCUS 2 VR

SCREEN VR

Signal
generator

1. RGB BLK

- / +

Test point Adjustment part Descrip tion

FOCUS 2 VR

V/C

: STORE i : EXIT

OK

0 0 0 0 0 1 0 0

PAL

00

FOCUS 1 VR
FOCUS 2 VR

[In HVT]

FOCUS 1 VR

SCREEN VR
(In HVT)

CLOW
status

1. Receive a cross-hatch signal.

2. By t urning the FOC US 2 VR, adjus t the to make th e vertic al
lines as fin e an d sh arp as p oss ib le.

3. By turning the F OC US 2 V R, ad jus t the pic t ure so t h at the 5t h
vertic al line f rom left side of th e c ross-h atch pic tur e bec omes
thinnest.

4. By turning the FOCUS 1 VR, adjust the 3rd horizontal line from
the upper s id e may b ecome unif orm at th e line c ent er and its
periphery.

5. Carry out adjus t m ent by r ep eat ing the st eps 3 and 4 ab ou t .

6. Make sure that wh en th e sc r een is d ark ened, t he l ines rem ain
in good foc us .

1. Press a whole black signal .

2. Press the ZOOM key and select the FLL mode.

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

4. Rotate the SCREEN VR clockwise from the full
counterclockwise position and stop it at the point where
“CLOW” status (marked in Fig.) changes from 1 to 0 (which
is indicated at the 3rd

“CLOW” : control l oop ou t of wi nd ow .

*

column from the right.)

SERVICE MODE SCREEN

VSM PRESET SETTING

Item

Setting of
VSM PRESET

Settin

item

COOL
NORMAL
WARM

Measuring
instrument

Remote
control unit

VSM preset

mode

1.CONT. 2.BRIGHT 3.SHARP 4.COLOUR 5.HUE 6.WDR R 7.WDR G 8.WDR B

[phone]

Test point Adjust m ent part Description

1. CONT.

2. BRI GHT

3. SHARP

4. COLOUR

5. HUE

6. WDR R

7. WDR G

8. WDR B

1. Select 5.VSM PRESET from the SERVICE MENU.

2. Select COOL with the MENU key of the remote control unit.

3. Adjust the FUNCTION UP/DOWN and -/+ key to bring the set
val ues of 1 .CON T.～ 8. W DR B to the values shown in th e
table.

4. Press the MEN U k ey and mem ori z e t h e s et value.

5. Respectively select the VSM PRESET mode for NORMAL and
WAR M, and m ak e sim il ar ad jus t m ent as in 3 above.

6. Press the MEN U k ey and mem ori z e t h e s et value.

Refer to OPERATING INSTRUCTIONS for the PICTURE

$

MODE.

00-1200000

-13 0 -12 -1 0 +5 0 0

SETTING VALUES OF VSM PRESET

18

No. 51778

A

R

A

A

Y

VIDEO/CHROMA CIRCUIT ADJUSTM E NT

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.

V28L2EUG

V28L2EUBL

V28L2EUG

Colour system

Setting item

1.RGB BLK 7.COLOUR

2.WDR R

3.WDR G

4.WDR B

5.BRIGHT

6.CONTRAST

Item

Adjustment
of WHITE
BALANCE
(High-Light)

Measuring

instrument

Signal
generator

Remote
control unit

Initial setting val ue Init i al settin g val ue

PAL SECAM

000

000

%

-012

000

000

Test point Adjustment part Desc ription

2.WDR R

3.WDR G

NTSC

Setting item

8.HUE

9.SHARP

10.VCO ADJUSTM ENT

11.V IDE O AG C

12.SYNC SLICE

Set the PICTURE MODE to NORMAL.

"

1. Receive a black an d whi te sign al (c olour off ).

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

3. Modify 2. WDR R and 3.WDR G data to adjust the white

4. Press the MENU k ey an d m em or i z e th e set value.

5. Change the contrast and brightness with the remote control up

marked

"

Colour system

PAL SECAM NTSC

000 000 000

%

+007

Automatically optimized

%

000

%

+007

balance ( high light ).

& down from low–light to high –l ight and ch ec k that the tracki n g
of the white balance is good.

:Do not adjust

%

after adjus tment

020

Adjustment
of
SUB BR I GHT

Adjustment
Of SU B
CONTRAST.

Remote
control unit

Remote
control unit

5.BRIGHT

6.CONTRAST

No. 51778

1. Receive any broad cast.

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

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

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

5. If the brightness is not the best with th e initial setting value,
make fin e adj us tm en t unt il y ou g et t h e bes t br ig ht n ess .

6. Press the MENU k ey an d m em or i z e th e set value.

1. Receive any broad cast.

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

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

4. Set the initial setting value with t h e FUNCTION - or + key.

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

6. Press the MENU k ey an d m em or i z e th e set value.

19

A

V28L2EUGR

A

A

Y

V28L2EUBL
V28L2EUG

Item

Adjustment
of SUB
COLOUR

ⅠⅠⅠⅠ

Measuring

instrument

Remote
control unit

Test point Adjustment p art Description

key

CH.

MENU

( OK ) key

7.COLOUR
(PAL/SECAM/NTSC)

PAL COLOUR (PAL COLOUR)

SECAM COLOUR (SECAM COLOUR)

NTSC COLOUR

[Method of adjustment without measuring instrument]

1. Receive PAL broadcast.

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

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

4. Set the initial setting value for PAL COLOUR with the
FUNCTION - or + key.

5. If the col our is not th e bes t with th e initi al set val ue, mak e fin e
adjust m ent un t il you get t h e bes t c ol our .

6. Press the MENU k ey an d m em or i z e th e set value.

1. R ec eive a SEC AM broadcast.

2. Make fine adjustment of SECAM COLOUR in the same
manner as for ab ov e.

(NTSC 3.58 COLOUR)

1. Input a NTSC 3. 58MHz C OMPOSIT E VIDEO s ignal fr om the
EXT terminal.

2. M ake similar fine adjustment of NTSC 3.58 COLOUR in the
same manner as for above.

(

INFORMATION

i

FUNCTION

) key

key

(NTSC 4.43 COLOUR)

1. R ec eive a NTSC 4.43MHz CO MPOSITE VIDEO signal from
the EXT terminal.

2. Make similar fine adjustment of 4.43 COLOUR in the same
manner as for ab ov e.

20

No. 51778

A

V28L2EUG

R

A

A

Y

V28L2EUBL

V28L2EUG

Item

Adjustment
of SUB
COLOUR

ⅡⅡⅡⅡ

W

Measuring

instrument

Signal
generator

Oscilloscope

Remote
control unit

Cy Mg B

Test point Adjustment p art Description

TP-47B
TP-E(
[CRT
SOCKET
PWB ]

(A)

7.COLOUR
(PAL/SECAM/NTSC)

)

####

PAL COLOUR (PAL COLOUR)

SECAM COLOUR (SECAM COLOUR)

(-)

NTSC COLOUR

0

(+)

[Method of adjustment using measuring instrument]

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

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

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

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

5. C onn ect th e osc i lloscope between T P-47B and TP -E

6. Adjust PAL COLOUR and bring the value of
illustr ation to
blue (B)).

7. Pr ess the ME NU k ey an d memori z e the settin g val ue.

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

2. Set the initial setting value of SECAM COLOUR with the

FUNCTION -/+ key.

3. Adjust SECAM COLOUR and bring the value of

illustr ation to

4. Pr ess the ME NU k ey an d memori z e the settin g val ue.

(NTSC 3.58 COLOUR)

1. Input a NT SC 3. 58MH z CO MPOSIT E VI DEO si gnal (f ull f ield

colour bar with 75% white) from the EXT terminal.

2. Set the initial s etting value of NTSC 3.58 COLOUR with th e

FUNCTION -/+ key.

3. Adjust NTS C 3.58 CO LOUR and bring t he val ue of

illustr ation to

4. Pr ess the ME NU k ey an d memori z e the settin g val ue.

(volt age diff erenc e between w hite (w) an d

+5V

(W～B).

+4V

(W～B).

+6V

(A)

(A)

(A)

in the

of the

of t h e

(NTSC 4.43 COLOUR)

1. Input a NT SC 4. 43MH z CO MPOSIT E VI DEO si gnal (f ull f ield

colour bar with 75% white) from the EXT terminal.

2. S et the initi al s etting val ue of NTSC 4.43 COLO UR with the

FUNCTION -/+ key.

3. Adjust NTS C 4.43 CO LOUR and bring t he val ue of

illustr ation to

4. Pr ess the ME NU k ey an d memori z e the settin g val ue.

+6V

(W～B).

No. 51778

(A)

of t h e

21

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V28L2EUGR

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A

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V28L2EUBL
V28L2EUG

Item

Adjustment
of
SUB HUE

Adjustment
of
SUB HUE

ⅠⅠⅠⅠ

ⅡⅡⅡⅡ

Measuring

instrument

Remote
control unit

Signal
generator

Oscilloscope

Remote
control unit

Test point Adjustment p art Description

8.HUE [Method of adjustment without measuring instrument]

TP-47B
TP-E(

####

[CRT
SOCKET
PWB]

NTSC 3.58 HUE

NTSC 4.43 HUE [NTSC 4.43 HUE]

8.HUE [Method of adjustment using measuring instrument]

)

NTSC 3.58 HUE [NTSC 3.58 HUE]

[NTSC 3.58 HUE]

1. Input a NTSC 3.58MH z COMPO SITE VI DEO sign al (full f ield
colour bar with 75% white) from the EXT terminal.

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

3. Select 8.HUE with the FUNCTION UP/DOWN key.

4. Set the initial setting value of NTSC 3.58 HUE with the
FUNCTION -/+ key.

5. If you cannot get the best hue with the initial s etting value,
make fin e adj us tm en t unt il y ou g et t h e bes t hu e.

6. Press the MEN U k ey and mem ori z e t h e s et value.

1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at

the respective values.

1. Input a N TSC 3.58 MHz CO MPOSITE V IDEO sign al (full f ield
colour bar with 75% white) from the EXT terminal.

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

3. Select 8.HUE with the FUNCTION UP/DOWN key.

4. Set the initial setting value of NTSC 3.58 HUE with the
FUNCTION - or + key.

5. C onn ect t h e osc i ll oscope bet w een TP -47B and TP- E

6. Adjust NTSC 3.58 HUE to bring the value of
illustr ation to
magenta(Mg)).

7. Press the MEN U k ey and memor i z e t h e s etting valu e

･････････････････

(voltage differenc e between white (W) and

-3V

(NTSC only)

(B)

in the

NTSC 4.43 HUE [NTSC 4.43 HUE]

(B)

W

Cy Mg B

Adjustment
of VCO
for colour
decoder

Signal
generator

Remote
control unit

22

(-)

0

(+)

10. VCO

No. 51778

1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at
the respective values.

1. Input a P AL full f ield colour bar si gnal (75% white) f rom the
EXT terminal.

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

3. Select 10. VCO adjustment with the FUNCTION UP/DOWN
key.

4. Press the OK key th en autom at ically opt i mi z ed.

A

R

A

A

Y

DEFLECTION CIRCUIT ADJUST MENT

There are 4 as pect modes (
and ( 3 ) 120Hz i mode

When the 10 0 Hz FUL L mo d e ha s bee n est ablished, the set ting of other modes wil l be do n e aut o matically .

"

However , if the pi c tu re qu ali t y has n ot been opti miz e d , adj u st each mod e ag a in, respect ively.
The 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.

"

Setting item

1.V- SHIFT -4 +8 +1 0 +8 +2 0 0

2.V-SIZE [phone]

3.H-CENT -23 +4 -4 0 0 0 0 0

･････

･････････

･･････････

100Hz i 60Hz p 100Hz i 60Hz p 100Hz i

FULL,

①①①①

depending upon the kind of signal s ( vertic al frequency 100Hzi / 60HZp / 120Hzi ).

FULL PANORAMIC SUBTITLE COMPRESS

PANORAMIC,

②②②②

SUBTITLE,

③③③③

Initial settin g val ue

COMPRESS) of the ad jus tm ent ( 1 ) 100Hz i m od e, ( 2 ) 6 0 Hz p

④④④④

60Hz p

100Hz i

V28L2EUG

V28L2EUBL

V28L2EUG

120Hz i

4.H-SIZE -27-4-40000 0

5.TRAPEZ -17 [phone]

6.EW-PIN -45 0 0 0 0 0 0 0

7.COR-PIN0000000 0

8.COR-UP 0 0 0 0 0 0 0 0

9.COR-LO -10 0 0 0 0 0 0 0

10.ANGLE0000000 0

11.BOW 0000000 0

12.V-S.CR +6 0 +5 0 +7 0 0 0

13.V-LIN -4 [phone]
Screen tone : Do not move fixed value.

%

No. 51778

23

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V28L2EUGR

A

A

Y

V28L2EUBL
V28L2EUG

Item

Adjustment
of
V-SHIFT

Adjustment
of V-SIZE

Screen

size

Measuring

instrument

Signal
generator

Remote
control unit

Test point Adjustment p art Description

1. V- SHIFT

A

B

2.V-SIZE

Screen size

Picture

size

100%

[FULL mode]

1. Receive a circ l e pattern sig n al of vert ical fr equency 50H z.

2. Select 4.DEF from the SERVICE MENU.

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

4. Adjust V-SHIFT to make

5. Check the adjustment value above in other zoom mode.
If it is a wrong adjustm ent, re-adjus t in “PANORA MIC” mode
and adjus t b y 1. V-SH I FT.

6. Press the MENU k ey an d m em or i z e the set valu e.

7. Receive a cross-hatch signal.

8. Select 2.V-SIZE and set the initial setting value.

9. Adj ust V-S IZE and mak e sure that t he ver tic al screen siz e of
the picture size is in the bellow table.

10. Press the ME NU k ey an d m em o ri z e t h e s et value.

11. Input a NTSC VIDEO sign al (60Hz) from the EXT t er minal,
and make sure that the vertic al screen size is in the table
below.

12. Press the ME NU k ey an d m em o ri z e t h e s et value.

A = B

.

Picture size 100%

ASPECT

SCREEN
POSITION

TOP

BOTTOM 92% 87% 83%

24

FULL PANORAMIC

92% 87% 70%

[ SCREEN SIZE ]

SUB TITLE

No. 51778

A

V28L2EUG

R

A

A

Y

V28L2EUBL

V28L2EUG

Item

Adjustment of
H.CENTER

Adjustment
of
H.SIZE

Measuring

instrument

Signal
generator
Remote
control unit

CD

Test point Adjustment p art Description

3.H-CENT.

4.H-SIZE

13. Receive a cir c l e patt er n s ig n al.

14. Select 3.H-CENT and set the initial setting value.

15. Adjust H-CENT to make

16. Press the MEN U k ey an d m em or i z e the set valu e.

17. Receive a cross-hatch signal.

18. Select 4.H-SIZE and set the initial setting value.

19. Adjust H -SIZE and make sur e t hat t he hori zontal s cr een s ize
of the picture size is in the bellow table.

20. Press the MEN U k ey an d m em or i z e the set valu e.

21. Input a NTSC VIDEO signal (60Hz) from the EXT terminal, and
make sure that the horizontal screen size is in the table below.

22. Press the MEN U k ey an d m em or i z e the set valu e.

C=D

.

ASPECT

MODE

H SIZE

Adjustment of
EW-PIN

FULL PANORAMIC

92% 95% 92%

[ SCREEN SIZE ]

6.EW-PIN

Straight

SUBTITLE

23. Select 6.E W-PIN and set the initial setting value

24. Adjus t EW- PIN and mak e th e 2nd . vertic al li n es at t he l eft and
right edg es of t h e s c reen straight . Als o m ak e s ur e that th e 3r d
vertical lines are straight.

25. Press the MEN U k ey an d m em or i z e the set valu e.

No. 51778

25

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V28L2EUGR

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A

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V28L2EUBL
V28L2EUG

Item

Adjustment
of TRAPEZ

Adjustment of
CORNER
UP/ LOW

Measuring

instrument

Signal
generator
Remote
control unit

Signal
generator
Remote
control unit

Straight Straight

Test point Adjustment p art Description

5.TRAPEZ

Parallel

7.COR-PIN

8.COR-UP

9.COR-LO

26. Receive a cross-hatch signal.

27. Select 5.TRAPEZ with the FUNCTION UP/DOWN key.

28. Set the initial setting value of TRAPEZ with the FUNCTION ­or + key.

29. Adjust T RAPEZ and bring the VERTICAL lines at the right and
left edges of the screen parallel .

30. Press the MEN U k ey an d m em or i z e the set valu e.

31. Select 9.COR-LO with the FUNCTION UP / DOWN key.

32. Set the initial setting value of COR-LO with the FUNCTION –

or + key.

33. Adjust COR-LO, and bring the straight line at the low corner.

34. Select 8.COR-UP with the FUNCTION UP / DOWN key.

35. Set the initial setting value of COR-UP with the FUNCTION –

or + key.

36. Adjust COR-UP, and bring the straight line at the upper

corner.

37. If the extrem e upper & lower corners and a litt le pin or barr el,

chose 7.CO R -PIN and adj ust.
And adjust to get the straight. Store the set value.

Adjustment of
ANGLE

Signal
generator
Remote
control unit

26

10.ANGLE

No. 51778

In case where there is a parallelogrammical distortion of

"

images on the screen. (Fig. A)

38. Select 10.ANGLE with the FUNCTION UP / DOWN key.

39. Adjust ANGLE, and bring the VERTICAL lines straight.

40. Press the MEN U k ey an d m em or i z e the set valu e.

Fig. A

A

V28L2EUG

R

A

A

Y

V28L2EUBL

V28L2EUG

Item

Adjustment
of BOW

Adjustment
of V-S.CR &
V.LINE

Measuring

instrument

Signal
generator
Remote
control unit

Test point Adjustment p art Description

11.BOW

Fig. C

12.V-S.CR

13.V.LIN.

TOP

CENTER

In c ase where t here is a bow-sh aped dist ortion of im ages on

"

the screen. (Fig.C)

41. Select 11.BOW with the FUNCTION UP/DOWN key.

42. Adjust BOW, and bring the VERTICAL lines straight.

43. Press the MEN U k ey an d m em or i z e the set valu e.

When the ver tic al linear ity has been deter iorat ed rem ark ably,

!

perform the following steps.

44. Receive a cross-hatch signal.

45. Select 13. V.LIN with the FUNCTION UP / DOWN key.

46. Set the initial setting value of 13. V.LIN with the FUNCTION

- / + key.

47. Select 12. V-S.CR. with the FUNCTION UP / DOWN key.

48. Set the initial setting value of 12. V-S.CR. with the FUNCTION

- / + key.

49. Adjust 13. V .LIN and 12. V -S.CR . so that th e spac es of each
line on TOP, C EN T E R , an d BOTTOM b ec om e u niform.

BOTTOM

NOTE : Do not adjust “PANORAMIC” & “SUBTITLE” mode.

At first t he adjus tm ent in 1 00Hz FUL L mo de sh ould b e done,

then th e data for th e other aspect mode is corrected in the
respect ive valu e at th e same tim e. And c onfirm t he defl ection
adjust ment initial s etting value in 12 0Hz (NTSC EXT mod e)
FULL mode. If the adjustment in 1 00Hz each aspect mod e has
been don e and st ored, the dat a for the s ame as pect m odes in
120Hz is c orrect ed in the r espect ive value. O nly th e data f or
the other as pect mode in 120Hz is c orr ec t ed f or itself.

No. 51778

27

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V28L2EUGR

A

A

Y

V28L2EUBL
V28L2EUG

AUDIO CIRCUIT ADJUSTMENT

Do not touch

"

If values had changed for the some reason, set the initial values in the following table.

3. AUDIO(Do not ad j ust)

1. ERR LIMIT 00H～FFH 10H

3. AUDIO

Sett ing item Variable ran ge fixed value

adjust m ent of t h e SER V IC E MENU as it req uires no ad jus tment.

2. A2 ID THR

00H～FFH

19H

28

No. 51778

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R

A

A

Y

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 aft er r em ovi n g it.

SOLDERING IRON

!

1. Use a high insulat i on s old er in g iron with a thi n p oint ed end of it.

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

REPLACEMEN T STEPS

!

How to remove Chip parts

1.
Resistors, capacitors, etc

####

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

alternately m elt th e s older at each en d.

(2) S hif t wi th tweezers and remo ve th e ch ip part.

Transistors, diodes, variable resistors, etc

####

(1) Apply extra solder to each lead.

V28L2EUG

V28L2EUBL

V28L2EUG

2. Ho w to install Chip parts

Resistors, capacitors, etc

####

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

(2) Grasp th e chip part with tw eezers and pl ace it on th e sold er.

Then heat an d m elt t h e s old er at b oth en ds of th e 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

as indicated in the figure.

A

SOLDER

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

alternat el y melt t he s old er at each lead . Shif t and r emov e th e
chip part.

Note : After removing the part, remove remaining solder from the

pattern.

SOLDER

No.51778

A

C

(4) Then solder leads

A

C

and C.

B

B

B

29

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V28L2EUG

30

No.51778

A

V28L2EUG

R

A

A

Y

V28L2EUBL

V28L2EUG

No. 51778

47

V

ICTOR COMPANY OF JAPAN, LIMITED

HOME AV NETWORK BUSINESS UNIT 12, 3-chome, Moriya-cho, Knagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan

4

AV28L2EUGR-U #4

AV28L2EUBL-U #3

AV28L2EUGY-U #3

Printed in Japan
VP 0105
DP105851