AV-28QH4BU
SERVICE MANUAL
COLOUR TELEVISION
YA086B20053
AV-28QH4BU, AV-28QH4SU
Supplementary
The following items for the AV-29QH4BU and AV-29QH4SU were changed partly.
Therefore, this service manual describes only the items which differ from those of the AV-29QH4BU and AV29QH4SU service manual.
For details other than those described in this manual, please refer to the AV-29QH4BU and AV-29QH4SU
service manual (No.YA086, 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
FEAUTER BOX P.W. BOARD ASS'Y
NOTE: Be sure to change IC752, when the TUNER is changed.
Ref. No.
IC752 VE-30013571 VE-20190399 IC Compatible
BEFORE AFTER
BEFORE AFTER
Part No.
Part No.
PART NAME DESCRIPTION
PART NAME DESCRIPTION
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YA086B
2005/3
SECTION 1
PRECAUTION
Please refer to "AV-29QH4BU and AV-29QH4SU (No.YA086)" about this section.
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Please refer to "AV-29QH4BU and AV-29QH4SU (No.YA086)" about this section.
SECTION 3
DISASSEMBLY
Please refer to "AV-29QH4BU and AV-29QH4SU (No.YA086)" about this section.
SECTION 4
ADJUSTMENT
4.1 SETTING VALUES OF VIDEO 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 VIDEO 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.
Item
T_T THO SAM
BEFORE AFTER
Setting value
1-2 (No.YA086B)
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