SERVICE MANUAL
INTEGRATED DIGITAL COLOUR TELEVISION
YA087B20054
BASIC CHASSIS
HV-28D40BK
Supplementary
The following items for the HV-28D40BK was changed partly.
Also when replace the CRT by service, follow the procedure written in this service manual.
Therefore, this service manual describes only the items which differ from those of the HV-28D40BK service manual.
For details other than those described in this manual, please refer to the HV-28D40BK service manual (No.YA087, 2004/6).
HOW TO IDENTIFY MODELS
Serial numbers "16981405" or later are the subject.
MM
DIFFERENCE LIST
EXPLODED VIEW PARTS LIST-2 (Page 3-4)
Ref. No.
V01 W66ERF072X044 W66ERF172X044 ITC Inc.DEF YOKE/PC MAGNET
Before After
PRINTED WIRING BOARD PARTS LIST
MAIN P.W. BOARD ASS'Y (Page 3-6)
Ref. No.
IC781 AT24C25628D40BK ATE256-28D40BK IC (SERVICE)
DIST P.W. BOARD ASS'Y (Page 3-18)
Ref. No.
R1314 NRSA63J-682X NRSA63J-472X MG RESISTOR 4.7kΩ 1/16W J
Before After
Before After
Part No.
Part No.
Part No.
PART NAME DESCRIPTION
PART NAME DESCRIPTION
PART NAME DESCRIPTION
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.YA087B
2005/4
SECTION 1
PRECAUTION
Please refer to "HV-28D40BK (No.YA087)" about this section.
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Please refer to "HV-28D40BK (No.YA087)" about this section.
SECTION 3
DISASSEMBLY
Please refer to "HV-28D40BK (No.YA087)" about this section.
1-2 (No.YA087B)
4.1 ADJUSTMENT PROCEDURE
4.1.1 VIDEO CIRCUIT
Item
Measuring
instrument
SUB
CONTRAST
As a changed PictureTube has a different characteristic, be careful when performing the SUB
CONTRAST adjustment.
SECTION 4
ADJUSTMENT
Test point Adjustment part Description
PAL / NTSC
SUB COLOUR
Signal
generator
Remote
control unit
Signal
generator
Oscilloscope
Remote
control unit
W
(75%)
Y
TP-47R
TP-E
[CRT SOCKET
PWB]
Cy
B
G
Mg
R
[2. V/C]
9. COLOUR
[2. V/C]
9. COLOUR
(-)
(A)
0
(+)
Method of adjustment without measuring instruments
PAL COLOUR
(1) Receive PAL broadcast.
(2) Set the PICTURE MODE to STANDARD.
(3) Select 2. V/C from the SERVICE MODE.
(4) Set the initial setting value for < 9. COLOUR >.
(5) If the colour is not the best with the initial set value,
make fine adjustment until you get the best colour.
(6) Press the [MENU] key and memorize the set value.
NTSC 3.58 COLOUR
(1) Input NTSC 3.58MHz COMPOSITE VIDEO signal.
(2) Set the PICTURE MODE to STANDARD.
(3) Select 2. V/C from the SERVICE MODE.
(4) Set the initial setting value for < 9. COLOUR >.
(5) If the colour is not the best with the initial set value,
make fine adjustment until you get the best colour.
(6) Press the [MENU] key and memorize the set value.
NTSC 4.43 COLOUR
When NTSC 3.58 COLOUR set, NTSC 4.43 COLOUR
will automatically set.
Method of adjustment using measuring instruments
PAL COLOUR
(1) Receive PAL full field colour bar signal (75% white).
(2) Set the PICTURE MODE to STANDARD.
(3) Select 2. V/C from the SERVICE MODE.
(4) Set the initial setting value of < 9. COLOUR >.
(5) Connect the oscilloscope between TP-47R and TP-E.
(6) Adjust < 9. COLOUR > and bring the value of (A) in
the illustration to the -2V.
(7) Press the [MENU] key and memorize the set value.
NTSC 3.58 COLOUR
(1) Input NTSC3.58MHz full field colour bar signal (75%
white).
(2) Set the PICTURE MODE to STANDARD.
(3) Select 2. V/C from the SERVICE MODE.
(4) Set the initial setting value for < 9. COLOUR >.
(5) Connect the oscilloscope between TP-47R and TP-E.
(6) Adjust < 9. COLOUR > and bring the value of (A) in
the illustration to the +15V.
(7) Press the [MENU] key and memorize the set value.
NTSC 4.43 COLOUR
When NTSC 3.58 COLOUR set, NTSC 4.43 COLOUR
will automatically set.
(No.YA087B)1-3
Item
NTSC
SUB TINT
Measuring
instrument
Signal
generator
Remote
control unit
Signal
generator
Oscilloscope
Remote
control unit
W
(75%)
Y
Test point Adjustment part Description
[2. V/C]
10. HUE
Method of adjustment without measuring instruments
NTSC 3.58 TINT
(1) Input NTSC3.58MHz full field colour bar signal (75%
white).
(2) Set the PICTURE MODE to STANDARD.
(3) Select 2. V/C from the SERVICE MODE.
(4) Set the initial setting value of < 10. HUE >.
(5) If the tint is not the best with the initial set value,
make fine adjustment until you get the best hue.
(6) Press the [MENU] key and memorize the set value.
NTSC 4.43 TINT
When NTSC 3.58 TINT set, NTSC 4.43 TINT will
automatically set.
TP-47R
TP-E
[CRT SOCKET
PWB]
[2. V/C]
10. HUE
Method of adjustment using measuring instruments
NTSC 3.58 TINT
(1) Input NTSC3.58MHz full field colour bar signal (75%
white).
(2) Select 2. V/C from the SERVICE MODE.
(3) Set the PICTURE MODE to STANDARD.
(4) Set the initial setting value of < 10. HUE >.
(5) Connect the oscilloscope between TP-47R and TP-E.
(6) Adjust < 10. HUE > and bring the value of (B) in the
Cy
B
G
(-)
(B)
0
Mg
R
(+)
illustration to the +10V.
(7) Press the [MENU] key and memorize the set value.
NTSC 4.43 TINT
When NTSC 3.58 TINT set, NTSC 4.43 TINT will
automatically set.
SECTION 5
TROUBLESHOOTING
Please refer to "HV-28D40BK (No.YA087)" about this section.
Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan
(No.YA087B)
Printed in Japan
VPT
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