Page 1
AV28BT5ENS / AV28BT5ENB
AV28BT5EES / AV28BT5EEB
SERVICE MANUAL
COLOUR TELEVISION
AV28BT5ENS / AV28BT5ENB
AV28BT5EES / AV28BT5EEB
CONTENTS
SPECIFICATIONS
SAFETY PRECAUTIONS
FEATURES
MAIN DIFFERENCE PARTS LIST
SPECIFIC SERVICE INSTRUCTIONS
SERVICE ADJUSTMENTS
PARTS LIST
★
OPERATING INSTRUCTIONS
★
STANDARD CIRCUIT DIAGRAM
1
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COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
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17
2-1
No.51881
Dec. 2001
Page 2
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
SPECIFICATIONS
ITEM
Dimensions (WxHxD)
Weight
TV RF System
Colour System
Teletext System
Stereo System
Tuning System
Number Of C H memory position
Receiving Frequency
Intermediate Frequency
Colour Sub Carrier Frequency
Aerial Input Terminal
Power Input
Power Consumption
Picture Tube
High Voltage
Speaker
Audio Output
Input
Output
Input Terminal
Output Terminal
Remote Control Unit
TV Mode
Video Mode
VHF (VL)
VHF (VH)
UHF
CATV
VIF Carrier
SIF Carrier
Video
S/Video
Audio (L/R)
Video
Audio (L/R)
Rear Side
Front Side
Front Side
Rear Side
69 x 54 x 47 cm
34.6 kg
B/G B/G, D/K, K1
PAL PAL / SECAM
PAL / NTSC 3.58 / NTSC 4.43 PAL / SECAM / NTSC 3.58 / NTSC 4.43
Fastext / Toptext
A2 / German + NIC AM
Frequenc y Synthesizer Tuning System
100 ch
46.25MHZ ~ 168.25MHz
175.25MHz ~ 463.25MHz
471.25MHz ~ 863.25MHz
Super (S11-S20) & Hyper (S21-S41) bands receivable
38.9MHz
32.4MHz (6.5MHz)
32.9MHz (6.0MHz)
33.4MHz (5.5MHz)
PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz)
75Ohm Unbalanc ed
AC 170 ~ 270V
126W(Max.)/103W(Avg.) Stand-by<5W
28 inch measured diagonally
28kV (in cut-off service mode)
101 mm round type X 2
8W + 8W
1Vp-p, 75 Ohm
Y: 1Vp-p Positive
C: 0.286Vp-p
500 mVrms, High Impedance
1 Vp-p, 75 Ohm
500 mVrms, Low Impedance
AV1 (Video/Audio/RGB)
AV2 (Video/Audio/S-VHS)
AV3 (Video/Audio)
Headphone jack (Stereo mini jack 3.5)
AV1 (Video/Audio)
AV2 (Video/Audio) (Selected TV, AV1 or AV3)
RM-C85, Battery size:AAA/R03 x 2
AV28BT5ENS (Silver)
AV28BT5ENB (Black)
Content
AV28BT5EES (Silver)
AV28BT5EEB (Black)
Design & specifications are subject to change without notice.
2
No.51881
Page 3
A
A
■■■■
21-pin Euro connector (SCART socket) : AV-1 / AV-2
(P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak)
Pin
No.
Signal Designation Matching Value AV-1 AV-2
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
V28BT5ENS / AV28BT5ENB
V28BT5EES / AV28BT5EEB
○
(TV OUT)
○○
○
(TV OUT)
○○
○
(TV/LINE OUT)
○
(TV/LINE OUT)
5 GND (B)
6 AUDIO L input 500mVrms(Nominal), High impedance
7B input
FUNCTON SW
8
(SLOW SW)
9 GND (G)
10 - NC -
11 G input
12
- NC -
13 GND (R)
14 GND (YS)
15 R / C input
16 Ys input
17 GND(VIDEO output)
18 GND(VIDEO input)
19 VIDEO output
20 VIDEO / Y input
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
B-W
Ω○
, 75
B-W
Ω○
, 75
B-W
Ω
, 75
P-P
Ω
(Negative going sync), 75
S-W
(Negative going sync), 75
S-W
Ω○
Ω
Ω○○
○○
○○
○
○○
○○
○
○
(R/C)
○○
○○
○
(TV)
(TV/LINE OUT)
NC
NC
NC
NC
○
(only C)
NC
○
21 COMMON GND
[
Pin assignment
]
No.51881
○○
3
Page 4
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
SAFETY PRECAUTIONS
1. The design of this product cont ains 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 identic al to those used in the original
circuits. Service should be performed by qualified personnel
only.
2. Alterations of the design or circuitry of the product should not be
made. Any design alterations or additions will void the
manufacturer's warranty and will further relieve the manufacturer
of responsibility for personal injury or property damage resulting
theref rom.
3. Many electr ical and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident from visual inspection nor can the protection
afforded by them necess ary be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement
parts which have these special safety characteristics are
identified in the Parts List of Service Manual.
components having such features are identified by shading
on the schematics and by (
Service Manual.
does not have the same safety characteristics as the
recommended replacement part shown in the Parts List of
Ser vice M an ual may caus e s hoc k, fire, or oth er hazards.
4.
Don’t short between the LIVE side ground and ISOLATED
(NEUTRAL) side ground or EARTH side ground when
repairing.
Some models power circuit is partly different in the GND. The
differenc e of the GND is shown by the LIVE : () 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
measnur e with a measuring apparatus (oscilloscope etc.) the
LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH
side GND at the same time.
If above note willl not be kept, a fuse or any parts will 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 high voltage applied to the pictur e tube must conform with
that specified in Srevic e manual. Exc essive high voltage can
cause an incr ease in X-Ray emission, arcing and possible
component damage, therefore operation under excessive high
voltage conditions should be kept to minimum, or should be
preveted. If severe arcing occurs, remove the AC power
immediately and det ermine the caus e by visual inspecton
(incorrect installation, cr acked or melted high voltage harness,
poor soldering, etc.). To maintain the proper minimum level of
soft X-Ray emission, components in the high volt age circuitry
including the picture tube must be the exact replacements or
alternatives approved by the manuf acturer of the complete
product.
The use of a substitute replacement which
) on the Parts List in the
Electrical
8. W hen service is required, observe the original lead dress. Extra
precaution should be given to assure correct lead dress in the
hig voltage circuit area. Where a short curcuit has occurred,
those components that indicat e evidenc e of overheating should
be replaced. Always us e the manuf acturer’s replacement
components.
9.
Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perf orm an isolation
check on the exposed metal parts of the cabinet (antenna
terminals, videl/audio input and output terminals, Control knobs,
metal c abinet, screwheads, earphone jack, c ontrol shafts, etc.)
to be sure the product is safe to operate without danger of
electr ic al shoc k.
(1)
Dielectric Strength Test
The isolation between the AC primary circuit and all metal parts
exposed to the user, particularly any expos ed metal part having a
return path to the chassis should withstand a voltage of 3000V
AC(r.m.s.) for a period of one second.
( . . .Withstand a voltage of 1100V AC (r.m.s.) to an applianc e
rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated
200V or more, for a period of one second.)
This method of test requires a test equipment not generally found
in the s ervice trade.
(2)
Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer dur ing this check.). Using a ”Leakage
Current T ester”, measur e 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 knowm good earth
ground (water pipe, etc.). Any leakege curr ent must not exceed
0.5mA AC(r.m.s.).
Alternate Check Method
●
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Use an AC voltmeter
having 1000 ohms per volt or more sensitivity in the following
manner. Connect a 1500Ω 10W resistor paralleled by a 0.15μF
AC-type capacitor between an expos ed metal part and a known
good earth ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the resistor
connection to each exposed metal part, particularly any exposed
metal part having a return path to the chassis, and measure the
AC voltage acr oss the r esistor. Now, revers e the plug in the AC
outlet and repeat earc h measurement. A ny voltage meas ured
must mot exceed 0.35V AC (r.m.s.). This corresponds to 0.5mA
AC (r.m.s.).
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
picture tube before attempting meter connection, by connecting
a clip lead to the ground frame and connecting the other end of
the lead through a 10kΩ 2W resistor to the anode button.
4
No.51881
Page 5
A
A
FEATURES
V28BT5ENS / AV28BT5ENB
V28BT5EES / AV28BT5EEB
1. It is a remte controlled color television.
2. 100 programs from VHF, UHF bands or cable channels c an be
preset.
3. It can tune c able channels.
4. Controlling the TV is very easy by its menu driven system.
5. It has two Euroconnector sockets for external device (such as
video recorder, video games, audio set, etc.)
6. Front A V Input available.
7. Stereo sound s ystems (German + Nicam) are available.
8. Full function Teletext (Fastext, Toptext).
9. It is possible to connect headphone.
10. Direct channel access.
11. APS (Automatic Programming System).
12. All programs can be named.
13. Forward or backward automatic tuning.
14. Automatic s ound mute when no trans mission.
15. 5 minutes after the broadcasting (closedown), the TV s witches
itself automatically to stand-by mode.
MAIN DIFFERENCE LIST
MODEL No.
Parts Name
MAIN PWB VE-20073586
F CARTON BOX VE-20074229 VE-20073917 VE-20074101 VE-20074115
AV28BT5ENS
(Silver)
AV28BT5ENB
(Black)
←
AV28BT5EES
(Silver)
VE-20073447
AV28BT5EEB
(Black)
←
INST BOOK VE-50021021
RATING LABEL VE-20074227 VE-20073915 VE-20074100 VE-20074113
FRONT CABINET VE-20073707 VE-20003525 VE-20073707 VE-20003525
BACK COVER VE-20004635 VE-20016402 VE-20004635 VE-20016402
←
VE-50021020
←
No.51881
5
Page 6
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Remove the 8 screws marked A.
2. Withdraw the rear cover toward you.
REMOVING THE HEADPHONE JACK BOARD
ASS’Y
After removing the rear cover.
z
1. Remove the 1 screw marked B.
2. After pulling JACK BOARD back, it s hifts rightward.
REMOVING THE SPEAKER
After removing the rear cover.
z
1. Remove the 2 screws marked C, and remove the SPEAKER BKT
ASS’Y.
2. Remove the 4 screws marked D, and remove the SPEAKER BKT
COVER.
3. Remove the 4 screws marked E, and remove the SPEAKER.
REMOVING THE MAIN PWB & PROCEDURE TO
DEVELOPMENT
After removing the rear cover.
z
1. Remove the JACK BOARD ASS’Y.
2. Remove the LEFT SPEAKER BKT ASS’Y.
3. Remove the POW ER SUPPLY TRANSFORMER.
4. Remove the 2 screws marked F atached to the MAIN PWB
ASS’Y.
CAUTIONS)
Be careful enough when developing a main c hassis. The wire
of a POWER TRANSFER does not separate and short-circuit
with other parts.
REMOVING THE FRONT CONTROL PWB
After removing the rear cover.
z
1. Remove the MAIN PWB ASS’Y.
2. Remove the 6 screws marked G, and remove the FRONT
CONTROL PWB.
(×6)
(×2)
SPEAKER BKT
G
H
REMOVING THE POWER SW
After removing the rear cover.
z
1. Remove the MAIN PWB ASS’Y.
2. Remove the 2 screws marked H, and remove the POWER SW.
(×8)
A
REAR COVER
(×2)
F
(×4)
E
(×4)
D
SPEAKER BKT
POWER SW
FRONT CONTROL PWB
6
B
HEADPHONE JACK
No.51881
SPEAKER
(×2)
C
Page 7
A
A
SETTING OF THE LAST MEMORY FOR SHIPMENT
■■■■
USER SETTING VALUES
Setting Item Setting Value Setting Item Setting Value
SOUND MENU FEATURE MENU
BASS CENTER SLEEP TIMER OFF
V28BT5ENS / AV28BT5ENB
V28BT5EES / AV28BT5EEB
TREBLE
BALANCE
EFFECT OFF
PICTURE MENU INSTALL-> TV CONFIG. MENU
BRIGHTNESS LANGUAGE ENGLISH
COLOUR COUNTRY ?
CONTRAST AV-2 OUTPUT TV
SHARPNESS
HUE (only NTSC)
PICTURE MODE AUTO
■
SETTING APS BIT IN SERVICE MENU
1) Enter service menu in TV mode by pressing “INFO” and “MUTING” keys simultaneously. Service Menu will appear.
2) Select OPT IONS by pressing Up/Down keys on r emote control unit.
3) Enter OPTIONS by pressing Left/Right keys on remote control unit.
4) Select OPTION 8 by pressing Up/D own keys on r emote c ontrol unit.
5) Selected bit in one OPTION is shown by blinking character. Select B2 by pressing Left/Right keys on remote control unit.
DO NOT CHANGE ANY OTHER BIT.
6) Press digit key “ 1” to s et APS bit.
7) Press “STANDARD” key on remote control unit to exit service mode.
These adjust are automatically
restored when APS bit in Service
menu is s et.
The proc edure f or selling APS
bit is discribed bellow.
↑
↑
CHILD LOCK OFF
No.51881
7
Page 8
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
REPLACEMENT OF CHIP COMPONENT
CAUTIONS
1. Avoid heating for more than 3 seconds.
2. Do not rub the electr odes and the resist parts of the pattern.
3. When removing a chip part, melt the solder adequately.
4. Do not reus e a chip part after removing it.
SOLDERING IRON
1. Use a high insulation soldering iron with a thin pointed end of it.
2. A 30w soldering iron is recommended for easily removing parts.
REPLACEMENT STEPS
How to remove Chip parts
1.
Resistors, capacitors, etc.
(1) As shown in the figure, push the part with tweezers and
alternately melt the solder at each end.
2. How to install Chip parts
Resistors, capacitors, etc.
(1) Apply solder to the pattern as indicated in the figure.
(2) Shift with tweezers and remove the chip part.
Transistors, diodes, variable resistors, et c.
(1) Apply extra s older to each lead.
SOLDER
(2) As shown in the figure, push the part with tweezers and
alternately melt the solder at each lead. Shift and remove
the chip part.
SOLDER
(2) Grasp the chip part with tweezers and place it on the
solder. Then heat and melt the solder at both ends of the
chip part.
Transistors, diodes, variable resistors, et c.
(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
(4) Then solder leads
as indicated in the figure.
A
A
B
C
and C.
B
A
B
Note : After removing the part, remove remaining solder fr om
the pattern.
8
No. 51881
C
Page 9
A
A
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION:
1. You can make the necessary adjustments for this unit with
either the Remote Control Unit or With the adjustment tools
and parts as given belo w.
2. Adjustment with the Remote Control Unit is made on the
basis of the initial setting values, however, the new setting
values which set the screen to its optimum condition may
differ from the initial settings.
3. Make sure that AC power is turned on correctly.
4. Turn on the power for set and test equipment before use, and
start the adjustment procedur es after waiting at least 30 minutes.
5. Unless otherwis e specified, prepare the most suitable reception
or input signal for adjustment.
6. Never touch any adjustment parts which are not specified in the
list for this adjustment - variable resistors, transformers,
condensers, etc.
7. Presetting before adjustment.
Unless otherwise specified in the adjustment instructions, pr eset
the following functions with the remot e contr ol unit:
VIDEO STATUS STANDARD
TINT/COLOR
PICTURE/BRIGHT
DETAIL
V28BT5ENS / AV28BT5ENB
V28BT5EES / AV28BT5EEB
CENTER
ADJUSTMENT EQUIPMENT
1. DC voltmeter (or digital voltmeter)
2. Signal generator (Pattern generator)［PAL/SECAM/NTSC
3. Remote c ontrol unit
MAIN PARTS LOCATIONS
LED
REMOCON
RECEIVER
IC502
MEMOR Y IC
VIDEO R L
AUDIO.
IC501
MICOM
］
TOP
MENU
（＋）
（＋） （－）
（＋）（＋）
（－）
（－）（－）
PROG
/Ch.
（＋）
（＋） （－）
（＋）（＋）
VOL
（－）
（－）（－）
FRONT
FBT
MULTI SOUND PWB
TUNER
SCART-1 SCART-2
(Indicated [150/115V]
on the bottom side)
B1
No. 51881
UPPER : FOCUS VR
LOWER : SCREEN VR
9
Page 10
A
V28BT5ENS / AV28BT5ENB
A
A
V28BT5EES / AV28BT5EEB
BASIC OPERATION SERVICE MENU
■■■■
HOW TO ENTER THE SERVICE MODE
1) Press the
INFORMATION
CONTROL UNIT, simultaneously.
■■■■
SELECTION OF ADJUSTMENT ITEMS
1) Press the UP ( ) or
ADJUSTMENT ITEM.
2) Press the
RIGHT
ADJUSTMENT SCREEN.
3) To change the selected Parameter, us e
( ) key.
LEFT
■
HOW TO EXIT SERVICE MODE
1) Press the
■■■■
ADJUSTMENT SERVICE MENU
STANDARD
ADJUSTMENT ITEM
AGC 03 AGC
IF-PLL NEGATIVE 04 IF-PLL Negative
IF-PLL POSITIVE 05 IF-PLL Positive
LUMINANCE DELAY
VERTICAL ZOOM
VERTICAL SCROLL
4 : 3 HORIZONTAL SHIFT
VERTICAL SLOPE
VERTICAL AMPLITUD
S-CORRE CTION
VERTICAL SHIFT
EW W IDTH
EW PARABOLA WIDTH
EW CORNER PARABOLA
EW TRAPEZIUM
key and
DOWN
( ) or
MUTING
( ) key and select the
LEFT
key of REMOTE
( ) key and enter
( ) and
RIGHT
Key on REMOTE CONTROL UNIT.
ADJUST
No.
00 White Point RED
01 White Point GREENWHITE BALANCE
02 White Point BLUE
06 Y-Delay PAL
07 Y-Delay SECAM
08 Y-Delay NTS C
10 4 : 3 PICTURE MODE
21 16 : 9 PICTURE MODE
11 4 : 3 PICTURE MODE
22 16 : 9 PICTURE MODE
12 4 : 3 PICTURE MODE
23 16 : 9 PICTURE MODE
13 4 : 3 PICTURE MODE
24 16 : 9 PICTURE MODE
14 4 : 3 PICTURE MODE
25 16 : 9 PICTURE MODE
15 4 : 3 PICTURE MODE
26 16 : 9 PICTURE MODE
16 4 : 3 PICTURE MODE
27 16 : 9 PICTURE MODE
17 4 : 3 PICTURE MODE
28 16 : 9 PICTURE MODE
18 4 : 3 PICTURE MODE
29 16 : 9 PICTURE MODE
19 4 : 3 PICTURE MODE
30 16 : 9 PICTURE MODE
20 4 : 3 PICTURE MODE
31 16 : 9 PICTURE MODE
DISCRIPTION
REMOTE CONTROL UNIT key NAME
MUTING key
UP / DOWN key
INFORMATION
key
SERVICE
DJUST…..
OPTIONS…..
SERVICE MENU SCREEN
ADJUST
***
OUT UP
***
ADJUSTMENT SCREEN
***
STANDARD key
RIGHT / LEFT key
10
No. 51881
Page 11
A
A
ADJUSTMENTS
Item
SCREEN
VOLTAGE
Adju stment
Measurin g
instrument
Signal
Generator
Remote
Control
unit
V28BT5ENS / AV28BT5ENB
V28BT5EES / AV28BT5EEB
Test point Adjustment part Description
SCREEN VR
[FBT]
OPTION 02
1. Receive a
2. Enter the Option settings in the SERVICE MENU.
3. Press the function
4. To change bit 6, come on to it by using function / and
make it “1” by pressing “1” white bit 2 is blinking.
5. Observe the thin horizontal blue-white line in the middle of the
screen, and adjust the lower VR of the FBT, until the line is in
its thinnest visible thickness.
6. Then make Option 02 bit 6 “0” , by pressing “0” on the remote
control unit, although you do not see any picture.
PAL
colour bar.
/
▲
key, and Ent er
▼
Option 02
.
FOCUS
Adju stment
B1
VOLTAGE
check
Signal
generator
DC
Voltmeter
Marked
[150/115V]
on the
MAIN PWB
FOCUS VR
[FBT]
1. Receive a
2. Adjust the upper VR of the FBT, until you get the Optinum
focus, the sharpest picture.
1. Check whether the voltage at the point named and silk
screened as “150 / 115V” on the MAIN PWB is 150V DC.
circle pattern.
PAL
No. 51881
11
Page 12
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
Item
WHITE
BALANCE
Measurin g
instruments
Signal
generator
Test point Adjustment part Description
ADJUST 00
(White point
ADJUST 01
(White
point
-
GREEN)
ADJUST 02
(White point
- BLUE)
- RED)
[LOW LIGHT]
1. Receive a whole black signal.
2. Adjust the <Adjust 00>, <Adjust 01>, <Adjust 02>, in the
SERVICE MENU s o that the entire screen do not shine black.
[HIGH LIGHT]
1. Receive a white and black signal (colour off).
2. Adjust the <Adjust 00>, <Adjust 01>, <Adjust 02>, in the
SERVICE MENU so that the whiteness in the screen become
sharp.
AGC
Adju stment
IF-PLL
NEGATIVE
Adju stment
IF-PLL
POSITIVE
Adju stment
DC
voltmeter
ADJUST 03
ADJUST 04
ADJUST 05
1. Receive a any broadcast.
2. Select
3. Connect a DC voltmeter to pin 1 of the tuner. Change the
<ADJUST 03>
AGC parameter until you see 3.70VDC on voltmeter display.
from SERVICE MENU
1. Select
2. Adjustment value is set to 80 as a default value.
<ADJUST 04>
from SERVICE MENU.
1. Select
2. Adjustment value is set to 80 as a default value.
<ADJUST 05>
from SERVICE MENU.
12
No. 51881
Page 13
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
Item
LUMINANCE
DELAY
Adju stment
Measurin g
instruments
Signal
generator
Test point Adjustment part Description
Adjust 06 [ Y-Delay PAL ]
1. Receive a
2. Select
3. Adjust Y-Delay PAL till the colour transients on the c olour
bar of the pattern become as sharper and colours between
transients do not mix with each other as possible.
Note: If the SAW filter is one of the G1965M, J1951M, K2958M,
K2962M, G3957M, K6256K, K6259K or M1963M, there is
constant group delay distortion, so for an equal delay of
the luminance and chrominanc e signal the delay must be
set at a value of 160nS. This means the adjustment must
be set to the maximum value.
Adju st 07 [ Y-Delay SEC AM ]
1. Receive a
2. Select
3. Adjust
colour bar of the pattern become as sharper and colours
between transients do not mix with each other as possible.
Note: If the SAW filter is one of the G1965M, K2958M,
K2962M, G3957M, K6256K or K6259K, there is c onstant
group delay distortion, so for an equal delay of the
luminance and chrominanc e signal the delay must be set
at a value of 160nS. T his means the adjustment must be
set to the maximum value.
colour bar signal.
PAL
<Adjust 06>
SECAM
<Adjust 07>
Y-Delay SECAM
from SERVICE MENU.
colour bar signal.
from SERVICE MENU.
till the colour transients on the
Adju st 08 [ Y-Delay NTSC ]
1. Receive a
2. Select
3. Adjust
bar of the pattern become as sharper and colours between
transients do not mix with each other as possible.
Note: If the SAW filter is M1963M, there is constant group delay
distortion, so for an equal delay of the luminance and
chrominance signal the delay must be set at a value of
160nS. This means the adjustment must be set to the
maximum value.
NTSC
<Adjust 08>
Y-Delay NTSC
colour bar signal.
from SERVICE MENU.
till the c olour transients on the colour
No. 51881
13
Page 14
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
Item
VERTICAL
ZOOM
Adju stment
VERTICAL
SCROLL
Adju stment
4 : 3
HORIZONTAL
SHIFT
Adju stment
Measurin g
instruments
Signal
generator
Signal
generator
Signal
generator
Test point Adjustment part Description
Adjust 10 ( 4 : 3 )
Adjust 21 ( 16 : 9 )
Adjust 11 ( 4 : 3 )
Adjust 22 ( 16 : 9 )
Adjust 12 ( 4 : 3 )
Adjust 23 ( 16 : 9 )
1. Receive a
2. Set
< 4 : 3 aspect mode >
3. Select
4. Change ver tical zoom till you see the upper and olwer limit
5. Set
6. Adjusts with the step which is the same above from 3 to 4
1. Receive a
2. Set
3. Select
4. Change vertical scroll till you see the circle exactly un the
5. Set
6. Adjusts with the step which is the same above from 3 to 4
1. Receive a
2. Set
3. Select
4. Change horizontal shift till the picture is horizontally
5. Set
6. Adjusts with the step which is the same above from 3 to 4
< ADJUST 10 >
of the circle as close to the upper and lower limit of the
picture tube as possible.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
< 4 : 3 aspect mode >
< ADJUST 11 >
middle of the screen.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
< 4 : 3 aspect mode >
< ADJUST 12 >
centered. Check whether this adjustment is correct after
completing Servic e Mode Adjustment.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
circle test pattern.
PAL
from SERVICE MENU.
circle test pattern.
PAL
from SERVICE MENU.
RED PURITY
.
.
.
.
test pattern.
.
from SERVICE MENU.
.
VERTICAL
SLOPE
Adju stment
VERTICAL
AM PLITUDE
Adju stment
Signal
generator
Signal
generator
Adjust 13 ( 4 : 3 )
Adjust 24 ( 16 : 9 )
Adjust 14 ( 4 : 3 )
Adjust 25 ( 16 : 9 )
1. Receive a
2. Set
3. Select
4. Change vertical slope till the size of squares on both the
upper and lower part of test pattern become equal to the
squares laying on the vertical centre of the test pattern.
5. Check and readjust VERTICAL SLOPE item if the
adjustment becomes improper after some other geometric
adjustments are done.
6. Set
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
1. Receive a
2. Set
3. Select
4. Change vertical slope till horizontal black lines on both the
upper and lower part of the test pattern become very close
to the upper and lower horizontal sides of picture tube and
nearly about to disappear.
5. Check and readjust VERTICAL AMPLITUDE item if the
adjustment becomes improper after some other geometric
adjustments are done.
6. Set
7. Adjusts with the step which is the same above from 3 to 5
about the 16 : 9 aspect mode, too.
CROSS-HATCH
< 4 : 3 aspect mode >
< ADJUST 13 >
< 16 : 9 aspect mode >
test pattern signal.
PAL
< 4 : 3 aspect mode >
< ADJUST 14 >
< 16 : 9 aspect mode >
signal.
.
from SERVICE MENU.
.
.
from SERVICE MENU.
.
14
No. 51881
Page 15
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
Item
S-CORRECTION
Adju stment
VERTICAL
SHIFT
Adju stment
EW WIDTH
Adju stment
Measurin g
instrument
Signal
generator
Signal
generator
Signal
generator
Test point Adjustment part Description
Adjust 15 ( 4 : 3 )
Adjust 26 ( 16 : 9 )
Adjust 16 ( 4 : 3 )
Adjust 27 ( 16 : 9 )
Adjust 17 ( 4 : 3 )
Adjust 28 ( 16 : 9 )
1. Receive a
2. Set
< 4 : 3 aspect mode >
3. Select
4. Change S-correction till the middle part of the circle is round
5. Set
6. Adjusts with the step which is the same above from 3 to 4
1. Receive a
2. Set
3. Select
4. Change Vertic al Shift till the test pattern is vertically centred,
5. Check and readjust Vertical S hift item if the adjustment
6. Set
7. Adjusts with the step which is the same above from 3 to 5
1. Receive a
2. Set
3. Select
4. Change EW Width till the vertical black and white bars on
5. Set
6. Adjusts with the step which is the s ame above from 3 to 4
< ADJUST 15 >
as possible.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
in the top and the bottom and on either side to find ).
< 4 : 3 aspect mode >
< ADJUST 16 >
i.e. horizontal line at the centre pattern is in equal dist ance
both to upper and lower side of the picture tube.
becomes improper after some other geometric adjustments
are done.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
< 4 : 3 aspect mode >
< ADJUST 17 >
both left and right side of the pattern exactly dis appear.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
circle pattern signal.
PAL
.
from SERVICE MENU.
.
test pattern signal ( or the symmetric al signal
PAL
.
from SERVICE MENU.
.
test pattern signal.
PAL
.
from SERVICE MENU.
.
EW
PARABOLA
WIDTH
Adju stment
EW CORNER
PARABOLA
Adju stment
Signal
generator
Signal
generator
Adjust 18 ( 4 : 3 )
Adjust 29 ( 16 : 9 )
Adjust 19 ( 4 : 3 )
Adjust 30 ( 16 : 9 )
1. Receive a
2. Set
< 4 : 3 aspect mode >
3. Select
4. Change EW Parabola W idth till vertical lines close to the both
5. Check and readjust EW Parabola Width item if the
6. Set
7. Adjusts with the step which is the s ame above from 3 to 5
1. Receive a
2. Set
3. Select
4. Change EW Corner Parabola till vertical lines at the corners
5. Check and readjust EW Corner Parabola item if the
6. Set
7. Adjusts with the step which is the s ame above from 3 to 5
< ADJUST 18 >
sides of the picture frame become parallel to vertical side of
picture tube.
adjustment becomes improper after some other geometric
adjustments are done.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
< 4 : 3 aspect mode >
< ADJUST 19 >
of both sides of picture frame become vertical and parallel to
vertical corner sides of picture tube.
adjustment becomes improper after some other geometric
adjustments are done.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
test pattern signal.
PAL
test pattern signal.
PAL
.
from SERVICE MENU.
.
.
from SERVICE MENU.
.
No. 51881
15
Page 16
A
V28BT5ENS / AV28BT5ENB
A
V28BT5EES / AV28BT5EEB
Item
EW
TRAPEZIUM
Adju stment
Measurin g
instrument
Signal
generator
Test point Adjustment part Description
Adjust 20 ( 4 : 3 )
Adjust 31 ( 16 : 9 )
1. Receive a
2. Set
< 4 : 3 aspect mode >
3. Select
4. Change EW Trapezium till vertic al lines, especially lines at
5. Check and readjust EW Trapezium item if the adjustment
6. Set
7. Adjusts with the step which is the same above from 3 to 5
< ADJUST 15 >
the sides of the picture frame became parallel to the both
sides of picture tube as possible.
becomes improper after some other geometric adjustment.
< 16 : 9 aspect mode >
about the 16 : 9 aspect mode, too.
circle pattern signal.
PAL
from SERVICE MENU.
.
.
16
No. 51881
Page 17
VICTOR COMP ANY OF J APAN, LIMITED
HOME AV NETWORK BUSINESS UNIT 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan
4
VP 0112
DP205180
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