R : 700mV
C : 300mV
Low : 0 - 0.4, High : 1 - 3V, 75
(Negative going sync), 75
1V
P-P
(Negative going sync), 75
1V
P-P
Ω○
, 75
B-W
Ω○
, 75
B-W
Ω
, 75
B-W
Ω
, 75
P-P
Ω○
Ω○
Ω○○○
○
(TV OUT)
○○○
○
(TV OUT)
○○○
○○○
○○○
○○○
○○○
○○○
○
○
(only R)
○○○
○○○
(TV)
○○○
○
(LINE OUT)
○
(LINE OUT)
NCNC
○
NCNC
○
NCNC
○
(only C)
NCNC
○
(LINE OUT)
NC
NC
NC
NC
○
(only C)
NC
[
Pin assignment
]
No.51777
3
A
V28S2EKGR / AV28S2EKBL
A
V28S2EIGR / AV28S2EIBL
SAFETY PRECAUTIONS
1. The design of this product contains special hardware and 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 identical 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
therefrom.
3. Many electrical and mechanical parts in the product have special
safety-related characteristics. These characteristics are often not
evident from visual inspection nor can the protection afforded by
them necessary be obtained by using replacement components
rated for higher voltage, wattage, etc. Replacement parts which
WARNING
have these special safety characteristics are identified in the
Parts List of Service Manual. Electrical components having such
features are identified by shading on the schemati cs and by (!)
on the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety
characteristics as the recommended replacement part shown in
the Parts List of Service Manual m ay cause shock, fire, or ot her
hazards.
4. The leads in the products are routed and dressed with ties,
clamps, tubing’s, barriers and the like to be separated from live
parts, high temperature parts, moving parts and / or sharp edges
for the prevention of electric shock and fire hazard. When
service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been
returned to normal, after re-assembling.
1. The equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check sett i ng for local voltage.
4
No.51777
A
A
FEATURES
V28S2EKGR / AV28S2EKBL
V28S2EIGR / AV28S2EIBL
By preference, users can select the picture size from REGULAR,
"
PANORAMIC, FULL, 14:9 ZOOM, 16:9 ZOOM, 16:9 ZOOM SUB
TITLE modes. When the TV unit received WSS picture signal, the
picture can be changed to 16:9 ZOOM mode automatically.
The TELETEXT SYSTEM has a built-in FASTEXT and WST
"
system.
Because this TV unit corresponds to multiplex broadcast, users
"
can enjoy music programs and sporting events with live realism.
In addition, BILINGUAL programs can be heard in their original
language.
TVEXT-1EXT-3
EXT-2
Built-in ECO (ECONOMY, ECOLOGY) MODE.
"
In accordance with the brightness in a room, the brightness
and/or contrast of the picture can be adjusted automatically to
make the optimum picture which is easy on the eye.
Users can make VCR dubbing of picture and sound by controlling
"
the AV selector to select an opt ional source at the EXT-2 output
shown in figure.
FRONT FRAMELC11007-001B-ULC11007-002B-ULC11007-001B-ULC11007-002B-U
AV28S2EKGRAV28S2EKBLAV28S2EIGRAV28S2EIBL
←
←
←×←
SJK0S711A-U2
LCT0896-001A-U
←
←
No.51777
5
A
V28S2EKGR / AV28S2EKBL
A
A
A
V28S2EIGR / AV28S2EIBL
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power cord.
2. Remove the 10 screws marked ”A” as shown in the Fig. 1.
3. Withdraw the rear cover toward you.
REMOVING THE SIDE CONTROL JACK ASSEMBLY
After removing the rear cover.
"
1. Remove the screw marked B as shown in the Fig.1.
2. While slightly raise the side control jack assembly, rem ove the 2
claws under the side control jack assembly.
3. Disconnect the connector “SR”, “SL”, “S”, “F” and “K” as shown
in Fig 2.
REMOVING THE SIDE CONTROL PWB
After removing the rear cover and side control jack assembly.
"
1. Remove the 3 claws “C” from back side of the side control jack
assembly as shown in Fig.2.
2. Pull out the SIDE CONTROL PWB.
REMOVING THE CHASSIS
After removing the rear cover.
"
1. Slightly raise the both sides of the chassis by hand and remove
the two claws under the both sides of the chassis from the front
cabinet.
2. Withdraw the chassis backward.
(If necessary, take off the wire clamp, connectors etc.)
REMOVING THE SPEAKER BOX
After removing the rear cover.
"
1. Remove the 2 screws marked ”D” as shown in Fig. 1.
: W hen removing the screws marked D of the speaker box
NOTE
assembly, remove the lower side screw first, and then
remove the upper one.
2. Remove the 2 screws “E” attaching the speaker box.
3. Remove the 2 screws “F” attaching the speaker.
4. Follow the same steps when removing the other hand speaker.
REMOVING THE AV TERMINAL BOARD
After removing the rear cover.
"
1. Remove the 3 screws marked ”G” as shown in the Fig. 1.
2. Remove the claws marked “H” under the CHASSIS as shown in
Fig. 3.
3. While raising the claw marked “I”, remove the top of the AV
TERMINAL BOARD slightly in the direction of arrow ”J” as
shown in Fig. 3.
CHECKING THE PW BOARD
To check the back side of the PW Board.
1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).
2) Erect the chassis vertically so t hat you can easily check the
back side of the PW Board.
[CAUTION]
When erecting the chassis, be careful so that there will be no
"
contacting with other PW Board.
Bef ore turning on power, make sure that the wire connector is
"
properly connected.
When conducting a check with power supplied, be sure to confirm
"
that the CRT EARTH WIRE (BRAIDED ASS’Y ) is connected to
the CRT SOCKET PW board.
WIRE CLAMPING AND CABLE TYING
1. Be sure to clamp the wire.
2. Never remove the cable tie used for tying the wires together.
Should it be inadvertently removed, be s ure to tie the wires with
a new cable tie.
Connector
SR
SL
S
F
K
Fig. 2
J
V TERMINAL
BOARD
C
SIDE CONTROL
PWB
C
I
H
H
V SEL. PWB
Fig. 3
6
No.51777
A
A
FRONT CABINET
CRT
SOCKET
PWB
FRONT
CONTROL
PWB
V28S2EKGR / AV28S2EKBL
V28S2EIGR / AV28S2EIBL
SPEAKER
D
F
SPEAKER
BOX
E
Fig. 2
SIDE
CONTROL
JACK
ASSEMBLY
B
SPEAKER
AV SEL. PW B
D
SPEAKER
BOX
CONTROL BASE
CLAW
F
E
CLAW
AV TE RMINAL
BOARD
G
POWER &
DEF. PWB
CHASSIS
MAIN PWB
REAR COVER
Fig. 1
No.51777
A
7
A
V28S2EKGR / AV28S2EKBL
A
A
A
A
A
A
V28S2EIGR / AV28S2EIBL
REMOVING THE CRT
Replacement of the CRT should be performed by 2 or more
!
persons.
After removing the cover, chassis etc.,
"
1. Putting the CRT change table on soft cloth, the CRT change table
should also be covered with such soft cloth (shown in Fig.4).
2. While keeping the surface of CRT down, mount the TV set on the
CRT change table balanced will as shown in Fig.5.
3. Remove 4 screws marked by arrows with a box type sc rew dri ver
as shown in Fig.5.
Since the cabinet will drop when screws have been removed, be
"
sure to support the cabinet with hands.
4. After 4 screws have been removed, put the cabinet slowly on
cloth (At this time, be carefully so as not to damage the front
surface of the cabinet) shown in Fig.6.
The CRT should be assembled according to the opposite
"
sequence of its dismounting steps.
The CRT change table should preferably be smaller that the CRT
!
surface, and its height be about 35cm.
About CRT Spacer
!
An appropriate CRT spacer should be used in the corresponding
CRT in accordance with the type of the CRT.
When a CRT is replaced, special attention shoul d be paid to this
matter.
CRT CHANGE TABLE
PPROX.
35cm
CLOTH
Fig. 4
COATING OF SILICON GREASE FOR ELECTRICAL
INSULATION ON THE CRT ANODE CAP SECTION.
Subsequent to replacement of the CRT and HV transformer or
"
repair of the anode cap, etc. by dismounting them, be sure to
coat silicon grease for electrical insulation as shown in Fig.7.
Wipe around the anode button with clean and dry cloth. (Fig.7)
Coat silicon grease on the section around the anode butt on. At
this time, take care so that any silicon greases dose not stick to
the anode button. (Fig.8)
★★★★
Silicon grease product No. KS - 650N
CRT
node button
Silicon grease
coating
CABINET
pprox.
20mm (Do not
coat grease on
this section
node button
(No sticking of
silicon grease)
Fig. 5
CRT
CRT
CHANGE TABLE
Fig. 6
Silicon grease
should be coated
by 5mm or more
from the outside
diameter of
anode cap.
Coating position
of silicon grease
node cap
Fig. 7Fig. 8
8
No. 51777
A
A
REPLACEMENT OF CHIP COMPONENT
CAUTIONS
!
1. Avoid heating for more than 3 seconds.
2. Do not rub the electrodes and the resist parts of the pattern.
3. When removing a chip part, melt the solder adequately.
4. Do not reuse 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) Shift with tweezers and remove the chip part.
####
Transistors, diodes, variable resistors, etc
(1) Apply extra solder to each lead.
V28S2EKGR / AV28S2EKBL
V28S2EIGR / AV28S2EIBL
2. How to install Chip parts
####
Resistors, capacitors, etc
(1) Apply solder to the pattern as indicated in the figure.
(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, etc
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the solder.
A
(3) First solder lead
as indicated in the figure.
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.
Note : After removing the part, remove remaining solder from the
pattern.
SOLDER
No.51777
A
C
(4) Then solder leads
A
C
B
and C.
B
B
9
A
V28S2EKGR / AV28S2EKBL
A
V28S2EIGR / AV28S2EIBL
REPLACEMENT OF MEMORY ICs
1. Memory ICs
This TV use memory ICs. In the memory ICs, there are memorized data
for correctly operating the video and def lection circuits. When replacing
memory ICs, be sure to use ICs written with the initial values of data.
2. Procedure for replacing memory ICs
PROCEDURE
(1) Power off
Switch the power off and unplug the power cord from the wall outlet.
(2) Replace ICs.
Be sure to use memory ICs written with the initial data values.
(3) Power on
Plug the power cord into the wall outlet and switch the power on.
(4) Check and set SYSTEM CONSTANT SET:
It must not adjust without signal.
****
1) Press the INFORMATION key and the MUTING key of the
REMOTE CONTROL UNIT simultaneously.
2) The SERVICE MENU screen of Fig. 1 will be displayed.
3) While the SERVICE MENU is displayed, press the
INFORMATION key and MUTING key simultaneously, and the
SYSTEM CONSTANT SET screen of Fig. 2 will be displayed.
4) Check the setting val ues of the SYSTEM CONSTANT SET of
Table 1. If the value is different, select the setting item with the
FUNCTION UP/DOWN key, and set the correct value with the
FUNCTION -/+ key.
5) Press the MENU key to memorize the setting value.
6) Press the INFORMATION key twice, and return to the normal
screen.
SERVICE MENU
1. IF2. V/C
3. AUDIO4. DEF
5. VSM PRESET 6. VPS
7. AUTO PROGRAM (OFF)
1-7 : SELECT: EXIT
Fig.1
SYSTEM CONSTANT SET
MODEL=JK_EURO(V
COUNTRY:
INCH:
MODEL: **
OK
- +: STORE : EXIT
JVC JK EURO V00
******** - *****
Fig.2
*.****
**
**
)
(5) Setting of receive channels
Set the receive channel.
For setting, refer to the OPERATING INSTRUCTIONS.
(6) User settings
Check the user setting values of Table 2, and if setting value is
different, set the correct value.
For setting, refer to the OPERATING INSTRUCTIONS.
(7) Setting of SERVICE MENU
Verify the setting items of the SERVICE MENU of Table 3, and reset
where necessary.
For setting, refer to the SERVICE ADJUSTMENTS.
10
No. 51777
NAME OF REMOTE CONTROL KEY
Names of key
INFORMATION
key
iiii
MUTING
MENU
OK
FUNCTION UP/DOWN
▼
FUNCTION -/+
▼
▼
▼
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