JVC AV-28RT4BU/A, AV-28RT4BU/B, AV-28RT4BU/C, AV-28RT4SU/A, AV-28RT4SU/B Service Manual

SERVICE MANUAL

COLOUR TELEVISION

YA079B20053

AV-28RT4BU/A, AV-28RT4BU/B,

AV-28RT4BU

AV-28RT4SU

/C, AV-28RT4SU/A,

/B, AV-28RT4SU/C

Supplementary

The following items for the AV-28RT4BU/A, AV-28RT4BU/B, AV-28RT4BU/C, AV-28RT4SU/A, AV-28RT4SU/B
and AV-28RT4SU/C were changed partly.
Therefore, this service manual describes only the items which differ from those of the AV-28RT4BU/A, AV­28RT4BU/B, AV-28RT4BU/C, AV-28RT4SU/A, AV-28RT4SU/B and AV-28RT4SU/C service manual.
For details other than those described in this manual, please refer to the AV-28RT4BU/A, AV-28RT4BU/B,
AV-28RT4BU/C, AV-28RT4SU/A, AV-28RT4SU/B and AV-28RT4SU/C service manual (No.YA079, 2005/2).

DIFFERENCE LIST

PRINTED WIRING BOARD PARTS LIST

MAIN P.W. BOARD ASS'Y

Ref. No.

TU200 VE-30009637 VE-30033888 TUNER Non compatible

BEFORE AFTER

Part No.

COPYRIGHT © 2005 Victor Company of Japan, Limited

PART NAME DESCRIPTION

No.YA079B

2005/3

SECTION 1

PRECAUTION

Please refer to "AV-28RT4BU/A, AV-28RT4BU/B, AV-28RT4BU/C, AV-28RT4SU/A, AV-28RT4SU/B
and AV-28RT4SU/C (No.YA079)" about this section.

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

Please refer to "AV-28RT4BU/A, AV-28RT4BU/B, AV-28RT4BU/C, AV-28RT4SU/A, AV-28RT4SU/B
and AV-28RT4SU/C (No.YA079)" about this section.

SECTION 3

DISASSEMBLY

Please refer to "AV-28RT4BU/A, AV-28RT4BU/B, AV-28RT4BU/C, AV-28RT4SU/A, AV-28RT4SU/B
and AV-28RT4SU/C (No.YA079)" about this section.

SECTION 4

ADJUSTMENT

4.1 SETTING VALUES OF OPTION ITEMS

When a previous TUNER (VE-30009637) is replaced by a new TUNER (VE-30033888), it should be adjusted to the setting values in
the table below. If the TUNER of the model with the new TUNER (VE-30033888) is replaced, there is no need for adjustment.

4.1.1 SETTING VALUE OF OPTINS ITEM

Make sure not to change the values that are not in the table below. If those values are changed, the unit will not operate normally.

Setting value

Item

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Option 111000111010001110

Option 120000001100000001

Option 130000011000000010

Option 141000010100001000

Option 151010101001010010

Option 160000100100001011

Option 171010001000000010

Option 180001101100011101

BEFORE AFTER

1-2 (No.YA079B)

4.1.2 HOW TO ENTER THE SERVICE MODE

(1) Press the INFORMATION key and MUTING key

simultaneously, and the SERVICE MENU 1 screen will be
displayed. (Fig.1)

SERVICE MENU

SERVICE

ADJUST...
OPTIONS...

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

4.1.4 SELECTION OF OPTIONS ITEM

(2) Press the FUNCTION []/[] key to select the options item.
(3) Press the FUNCTION []/[] key to change the setting

value.

4.1.5 HOW TO STORE OF SETTING VALUE

(1) The setting value will be stored auto matically when

release the REMOTE CONTROL UNIT keys.

REMOTE CONTROL UNIT key NAME

Fig.1

4.1.3 HOW TO SELECT THE OPTIONS MENU

While the SERVICE MENU screen is displayed, press the []/[]
key and select the "OPTIONS...", then OPTIONS MENU screen
will be displayed.(Fig.2)

Bit 7

Bit 5 Bit 3 Bit 1

00000000

Bit 6 Bit 4 Bit 2 Bit 0

OPTIONS..

000 00 00000000

001 00 00000000
002 00 00000000
003 00 00000000
004 00 00000000
005 00 00000000
006 00 00000000
007 00 00000000
008 00 00000000
009 00 00000000

MUTING key

INFORMATION key

MENU key

FUNCTION

[ ]/[ ] key

FUNCTION

[ ]/[ ] key

SETTING ITEM No. SETTING VALUE

Fig.2

SECTION 5

TROUBLESHOOTING

Please refer to "AV-28RT4BU/A, AV-28RT4BU/B, AV-28RT4BU/C, AV-28RT4SU/A, AV-28RT4SU/B
and AV-28RT4SU/C (No.YA079)" about this section.

(No.YA079B)1-3

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

(No.YA079B)

Printed in Japan

VPT