JVC AV28S2EKGR Manuel utilisateur

No.51777

AV28S2EKGR / AV28S2EKBL

AV28S2EIGR / AV28S2EIBL

Mar. 2001

AV28S2EKGR / AV28S2EKBL

AV28S2EIGR / AV28S2EIBL

SERVICE MANUAL

COLOUR TELEVISION

BASIC CHASSIS

V28S2EKGR / AV28S2EKBL

V28S2EIGR / AV28S2EIBL

SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT

1. There are 2 ways of adjusting this TV: One is with the

REMOTE CONTROL UNIT and the other is the conventional

method using adjustment parts and components.

2. The setting (adjustment) using the REMOTE CONTROL

UNIT is made on the basis of the initial setting values. The

setting values which adjust the screen to the optimum

condition can be different from the initial setting values.

3. 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. Never touch parts (such as variable resistors, transformers and

condensers) not shown in the adjustment items of this service

adjustment.

7. Preparation for adjustment (presetting):

Unless otherwise specified in the adjustment items, preset the

following functions with the REMOTE CONTROL UNIT:

zSetting 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 generator) [PAL / NTSC]

4. Remote control unit

ADJUSTMENT ITEMS

٨Checking items.

٨Adjustment of FOCUS.

٨IF circuit adjustment.

٨VSM preset setting.

٨VIDEO / CHROMA circuit adjustment.

٨DEFLECTION circuit adjustment.

٨H. BLANKING ADJUSTMENT.

٨AUDIO circuit adjustment. (Do not adjust)

V28S2EKGR / AV28S2EKBL

V28S2EIGR / AV28S2EIBL

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

(adjustments):

(1) 1. IF 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 This mode adjusts the setting values of the IF circuit.

(2) 2.V/C 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 This mode adjusts the setting values of the VIDEO / CHROMA circuit.

(3) 3.AUDIO 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 This mode adjusts the setting values of the multiplicity SOUND circuit.

(4) 4.DEF 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 This mode adjusts the setting values of the DEFLECTION circuit for each aspect mode given below.

REGULAR (50/60Hz)

PANORAMIC (50/60Hz)

14:9 ZOOM (50/60Hz)

16:9 ZOOM (50/60Hz)

16:9 ZOOM SUB TITLE (50/60Hz)

FULL (50/60Hz)

(5) 5.VSM PRESET 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 This mode adjusts the initial setting values of COOL,NOMAL and WARM.

(VSM : Video Status Memory)

(6) 6.VPS 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 This mode shows the monitor of the VPS and PDC.(Do not adjust).

(VPS : Video Program System, PDC : Program Delivery Code)

(7) 7.AUTO PROGRAM 㨯㨯㨯㨯㨯㨯㨯㨯㨯 By turning the power switch on, you can get the state of AUTO PROGRAM. (Do not adjust)

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 MENU screen of Fig. 1 will be displayed.

(2) Selection of SUB MENU SCREEN

Press one of keys 1㨪7 of the REMOTE CONTROL UNIT

and select the SUB MENU SCREEN (See Fig. 3), form the

SERVICE MENU.

SERVICE MENU ψSUB MENU

1. IF

2. V / C

3. AUDIO

4. DEF.

5. VSM PRESET

6. VPS

7. AUTO PROGRAM

Names of key

INFORMATION

MUTING

FUNCTION UP/DOWN

FUNCTION -/+

key

NEME OF REMOTE CONTOROL KEY

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. VPS

7. AUTO PROGRAM (OFF)

1-7 : SELECT : EXIT

Fig.2

SERVICE MENU

V28S2EKGR / AV28S2EKBL

V28S2EIGR / AV28S2EIBL

SUB MENU 7. AUTO PROGRAM

(Do not adjust)

7. AUTO PROGRAM (OFF)

7. AUTO PROGRAM (ON)

COOL

NORMAL

WARM

1. BRIGHT

2. CONT.

3. COLOUR

4. SHARP

5. HUE

6. R DRIVE

7. B DRIVE

1. CUT OFF

2. DRIVE

3. BRIGHT

4. CONT.

5. COLOUR

6. HUE

7. BLACK OFFSET

8. SHARP (Do not adjust)

9. PURITY (Do not adjust)

1. CONC LIMIT

2. A2 ID THR

3. ALC

4. BASS

5. TREBLE

1. V-SHIFT

2. V-SIZE

3. SUBTITLE

4. H-CENT

5. H-SIZE

6. EW-PIN

7. TRAPEZ

8. EW.COR.L

9. EW.COR.H

10. V.S-COR

11. V-LIN

12. H-BLK-R

13. H-BLK-L

14. V-EHT(Do not adjust)

15. H-EHT(Do not adjust)

16. EHT-GAIN(Do not adjust)

Fig. 3 SUB MENU SCREEN

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. VPS

7. AUTO PROGRAM (OFF)

1-7 : SELECT : EXIT

SUB MENU 5. VSM PRESET

VSM PRESET NORMAL

1.BRIGHT ***

- + : STORE : EXIT

VCO (CW)

****

** .

.**

****

MHz

TOO HIGH

ABOVE REFERENCE

JUST REFERENCE

BELOW REFERENCE

TOO LOW

: EXIT

SUB MENU 6. VPS (Do not adjust)

VPS

VPS = 0000H(- - -)

PDC 8 / 30 / 1 = 0404H

: EXIT

V/C

1. CUT OFF (R) ****

(G) ****

(B) ****

- +

: STORE : EXIT

SUB MENU 2. V/C

PAL

AUDIO

- +

: STORE : EXIT

SUB MENU 3. AUDIO (Do not adjust)

1. CONC LIMIT 0AH

C AD BITS = ********

DEF PANORAMIC

****

1. V-SHIFT ***

(**)

- +

: STORE : EXIT

SUB MENU 4. DEF

SUB MENU 1.IF (VCO)

V28S2EKGR / AV28S2EKBL

V28S2EIGR / AV28S2EIBL

(3) Method of Setting

1) Method of Setting

1.IF

[VCO]

Ԙ1 Key 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 Select 1.IF.

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

ԚINFORMATION Key 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 Return to the SERVICE MENU screen.

2) Method of setting

2.V/C, 3.AUDIO, 4.DEF and 5.VSM PRESET.

Ԙ2㨪5 Key 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 Select one from 2. V/C, 3. AUDIO, 4. DEF and 5. VSM PRESET.

ԙFUNCTION UP/DOWN Key 㨯㨯㨯㨯㨯 Select setting items.

ԚFUNCTION -/+ 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 Set (adjust) the setting values of the setting items.

(Use the number keys of the REMOTE CONTROL UNIT for setting of WHITE BALANCE.

For the setting, refer to each item concerned.)

ԛMENU Key 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 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.)

ԜINFORMATION Key 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 Return to the SERVICE MENU screen.

3) Method of setting

6.VPS and 7.AUTO PROGRAM.

6.VPS 㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 This mode displayed monitor of VPS systems. (Do not adjust)

7.AUTO PROGRAM㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯㨯 When the MAIN POWER is turned on with the state of AUTO PROGRAM ON, you get a mode

that initializes every existing set value including language selection. Because this mode is set

at the factory upon completion of the adjustment, you need not to use it for service. (Do not

adjust in this mode.)

(4) Release of SERVICE MENU

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

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

No.51777 No.51777

2-3 2-4

BLOCK DIAGRAM

EXT-1

EXT-2

EXT-3

IC101

AV SW

TV_V

AV SEL PWB

V/Y/C/L/R3

Y OUT

TU001

TUNER

C OUT

IC601

POWER

AMP

SP L

SIDE

CONTROL

PWB (1/2)

Q307

Q308

VM OUT

Q101<

Q106

VIDEO

AMP

V01

VM COIL

CRT SOCKET

PWB

T901

SW TRANSF T551

FBT

Q501

H.DRIVE

Q521

H.OUT

POWER & DEF PWB

L4/R4

FRONT CONTROL

PWB

MAIN PWB

V/Y/C/L/R2

L/R1

FUSE

AC IN

RELAY

IC603

MULTI SOUND

PROCESSOR

L/R TV

SIF

TV_L

!

!

"

"

L/R

OUT1



!

JACK

IC301

V/C DEF

# 

IC302

RGB SW

""#

SC_R/G/B

" ! #



!

RGB

A.R/G/B/ IN



!

" R/G/B

R/G/B

OUT



IC872

TELETEXT

DECODERS

TEXT R/G/B

TEXT YS/R/G/B

IC871

DATA SLICER

C IN

Y IN

IC701

MICRO

COMPUTER

IC702

MEMOR

SDA/SCL

D (V)

D (H)

DEF.YOKE

SC_YS/R/G/B

SC_YS

TEXT YS

A.YS/YM

H.OUT

SCL/SDA

V.OUT

L4/R4/V4/C4/Y4

IC501

DEF

CONTROL

"

$

V PULSE

IC401

V.OUT

V DRIVE /V SAW

H DRIVE

OSD_VP

OSD_HP

EHV

FOCUS1/2

SCREEN

VM OUT

MAIN PWB

IC701

FRONT

CONTROL

PWB (1/2)

TV_L/R

TV_R

SP R



PULS

V PULS

HP VP

REG 9V

IC602(1/2

LPF



$

R/G/B/YS

' &

DIGITAL R/G/B/YS

OSD R/G/B/YS

RGB YS

LINE

FILTER

IC602(2/2

LPF

POWER SW

LED

REMOCON

ECO

SIDE

CONTROL

PWB (2/2)





"

IC602

BBE

C4/Y4

-:6"

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

No.51777 No.51777

2-5 2-6

CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM

MAIN PWB ASS'Y (1/2)

SJK-1911A-U2(AV28S2EKGR/EKBL)

SJK-1711A-U2(AV28S2EIGR/EIBL)

1911A-U2 1711A-U2

DIFFERENT LIST

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

No.51777 No.51777

2-7 2-8

MAIN PWB ASS'Y (2/2)

SJK-1911A-U2

(AV28S2EKGR/EKBL)

SJK-1711A-U2

(AV28S2EIGR/EIBL)

1911A-U2 1711A-U2

DIFFERENCE LIST

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

No.51777 No.51777

2-9 2-10

POWER & DEF PWB CIRCUIT DIAGRAM

POWER & DEF. PWB ASS'Y

SJK-2511A-U2

250

.0028

.011

1/4W

QQH0089-002-I2

4.7 1/2W FR

16.9K

.047 AC275V

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

AV28S2EKGR

AV28S2EKBL

AV28S2EIGR

AV28S2EIBL

No.51777 No.51777

2-11 2-12

AV SEL. PWB CIRCUIT DIARAM

AV SEL PWB ASS'Y

SJK0S911A-U2(AV28S2EKGR/EKBL)

SJK0S711A-U2(AV28S2EIGR/EIBL)

1.5

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