JVC AV-28X37SUE User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD. No.52106
2003/03
AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
COLOUR TELEVISION
52106200303 AV-28X37SUE, AV-28X37HKE,
AV-28X35HKE, AV-28X37HIE,
AV-28H35SUE, AV-28H35BUE,
AV-28X35HUE
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
AV-28X37SUE
AV-28X37HKE
AV-28X37HIE
AV-28X35HKE
AV-28H35SUE
AV-28H35BUE
AV-28X35HUE
<RM-C50H>
<RM-C54H>
<RM-C55H>
1 2 3
4 5 6
7 8 9
0
P
AV
TV OK
MENU
P
TV
BASIC CHASSIS
ML

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-2 (No.52106)
SPECIFICATION
Design & specifications are subject to change without notice.
Item Content
AV-28H35SUE
AV-28H35BUE AV-28X37SUE AV-28X35HUE AV-28X37HKE AV-28X35HKE AV-28X37HIE
Dimensions ( W x H x D )
85.4cm x 50.8cm x 49cm 85.4cm x 50.8cm x 49.3cm
Mass 36.3kg 39.0kg
TV RF System CCIR (B/G, D/K, I , L/L') CCIR (I)
Colour System PAL / SECAM / NTSC (Only in EXT mode) PAL
Stereo System A2 (B/G, D/K) / NICAM (B/G, I, D/K, L) NICAM (I)
Teletext System FLOF (Fastext)
TOP (German system)
WST(World standard system)
FLOF (Fastext)
WST(World standard system)
Receiving
Frequency VHF 47MHz ~ 470MHz Not avairable 47MHz ~ 470MHz
UHF 470MHz ~ 862MHz
Frenc CATV 116MHz ~ 172MHz / 220MHz ~ 469MHz -
Intermediate
Frequency VIF Carrier 38.9MHz (B/G, D/K, I , L) / 33.95MHz (L') 38.9MHz (I)
SIF Carrier 33.4MHz (5.5MHz:B/G)
/ 32.9MHz (6.0MHz:I)
/ 32.4MHz (6.5MHz:L, D/K)
/ 40.45MHz (6.5MHz:L')
32.9MHz (6.0MHz:I)
Colour Sub
Carrier Frequency PAL 4.43MHz
SECAM 4.40625MHz / 4.25MHz -
NTSC 3.58MHz / 4.43MHz 3.58MHz
Power Input AC220V ~ AC240V, 50Hz
Power Consumption 185W(Max) / 115W(Avg), standby : 2.5W
Aerial Input Terminal 75ohm unbalanced, coaxial
Picture Tube Visible size : 66cm, Measured diagonally H : 58.3cm x V : 33.0cm
High Voltage 31.0kV (+1kV / -1.5kV) (CRT cutoff, FULL mode)
Speaker 13cm x 6.5cm oval type x 2
Audio Power Output 10W + 10W
EXT-1 / EXT-2 / EXT-3
(Input / Output) 21-pin Euro connector (SCART socket)
EXT-4 (Input) Video 1V(p-p) 75ohm (RCA pin jack)
Audio (L/R) 500mV(rms) (-4dBs), High impedance (RCA pin jack)
S-Video Y : 1V(p-p) positive (negative sync provided, when terminated with 75ohm )
C : 0.3V(p-p) (Burst signal, when terminated with 75ohm )
AUDIO OUT (Variable) 0~1000mV(rms), Low impedance (RCA pin jack x 2)
Headphone Jack Stereo mini jack (Ø3.5mm )
Remote Control Unit RM-C54H (AAA/R03 dry battery x 2)
[Exept AV-28H35BUE]
RM-C50H (AAA/R03 dry battery x 2)
[Only AV-28H35BUE]
RM-C55H (AAA/R03 dry battery x 2)

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-3
21-pin Euro connector (SCART) : EXT-1/EXT-2/EXT-3
(P-P= Peak to Peak, B-W= Blanking to white peak)
PinNo. Signal Designation Matching Value EXT-1 EXT-2 PinNo. EXT-3
1 AUDIO R output 500mV(rms) (Nominal),
Low impedance Used (TV OUT) Used (LINE OUT) 22 NC
2 AUDIO R input 500mV(rms) (Nominal),
High impedance Used (R1) Used (R2) 23 Used (R3)
3 AUDIO L output 500mV(rms) (Nominal),
Low impedance Used (TV OUT) Used (LINE OUT) 24 Not used
4 AUDIO GND Used Used 25 Used
5 GND (B) Used Used 26 Used
6 AUDIO L input 500mV(rms) (Nominal),
High impedance Used (L1) Used (L2) 27 Used (L3)
7 B input 700mV(B-W), 75 ohm Used Used 28 Not used
8 FUNCTION SW
(SLOW SW) Low : 0V-3V, High : 8V-12V, High impedance Used Used 29 Used
9 GND (G) Used Used 30 Used
10 SCL / T-V LINK Not used Used (SCL2
/ TV-LINK) 31 Not used
11 G input 700mV(B-W), 75 ohm Used Used 32 Not used
12 SDA Not used Used(SDA2) 33 Not used
13 GND (R) Used Used 34 Used
14 GND (YS) Used Not used 35 Not used
15 R / C input R : 700mV(B-W), 75 ohm
C : 300mV(P-P), 75 ohm Used (R) Used (C2/R) 36 Used (C3)
16 Ys input
(FAST SW) Low : 0V-0.4V, High : 1V-3V, 75 ohm Used Used 37 Not used
17 GND (VIDEO output) Used Used 38 Used
18 GND (VIDEO input) Used Used 39 Used
19 VIDEO output 1V(P-P) (Negative sync),
75 ohm Used (TV OUT) Used (LINE OUT) 40 Not used
20 VIDEO / Y input 1V(P-P) (Negative sync),
75 ohm Used Used 41 Used
21 COMMON GND Used Used 42 Used
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
[Pin assignment]

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-4 (No.52106)
SECTION 1
PRECAUTIONS
1.1 SAFETY PRECAUTIONS [EXCEPT FOR UK]
(1) The design of this product contains 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 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 products 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 products have
special safety-related characteristics. These
characteristics are often not evident from visual inspection
nor can the protection afforded by them necessarily 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. Electrical components
having such features are identified by shading on the
schematics and by ( ) on the parts list in 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 may cause shock, fire, or other hazards.
(4) Don’t short between the LIVE side ground and
ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing.
Some model’s power circuit is partly different in the GND.
The difference 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
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.).
If above note will 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 picture tube must conform
with that specified in Service manual. Excessive high
voltage can cause an increase in X-Ray emission, arcing
and possible component damage, therefore operation
under excessive high voltage conditions should be kept to
a minimum, or should be prevented. If severe arcing
occurs, remove the AC power immediately and determine
the cause by visual inspection (incorrect installation,
cracked or melted high voltage harness, poor soldering,
etc.). To maintain the proper minimum level of soft X-Ray
emission, components in the high voltage circuitry
including the picture tube must be the exact replacements
or alternatives approved by the manufacturer of the
complete product.
(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 10k
2W resistor to the anode button.
(8) When service is required, observe the original lead dress.
Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced.
Always use the manufacturer’s replacement components.
(9) Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/ audio input and output
terminals, Control knobs, metal cabinet, screw heads,
earphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.
a) Dielectric Strength Test
The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed 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
appliance 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 service trade.
b) Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use
a line isolation transformer during this check.). Using a
“Leakage Current Tester”, measure 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 known good earth ground (water pipe, etc.). Any
leakage current must not exceed 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA 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 1500 ohm
10W resistor paralleled by a 0.15µF AC-type capacitor
between an exposed 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 across the resistor. Now,
reverse the plug in the AC outlet and repeat each
measurement. Any voltage measured must not exceed
0.75VAC(r.m.s.).Thiscorrespondsto0.5mAAC(r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500 10W
0.15 F AC-TYPE
GOOD EARTH GROUND

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-5
1.2 SAFETY PRECAUTIONS [FOR UK]
(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 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
schematics 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 may cause shock,
fire, or other 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.
WARNING
(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 setting for local voltage.

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-6 (No.52106)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
• New chassis design enable use of an interactive on screen
control.
• The TELETEXT SYSTEM has a built-in FASTEXT (UK
system), TOP (German system) and WST (world standard
system) 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.
• Users can make VCR dubbing of picture and sound by
controlling the AV selector to select an optional source at the
EXT-2 output shown in figure.
2.2 MAIN DIFFERENCE LIST
Part Name
AV-28X37SUE
AV-28X35HUE
AV-28H35SUE
AV-28H35BUE
AV-28X37HKE
AV-28X35HKE AV-28X37HIE
MAIN PWB ASSY SML-1002A-U2 SML-1902A-U2 SML-1002A-U2
MICOM&100Hz
PWB ASSY SML0Z001A-U2 [AV-28X37SUE / AV-28X35HUE]
SML0Z002A-U2
[AV-28H35SUE / AV-28H35BUE]
SML0Z001A-U2 SML0Z001A-U2
FRONT CABINET ASSY LC11562-001A-U [AV-28X37SUE]
LC11313-008A-U [AV-28X35HUE]
LC11313-007A-U [AV-28H35SUE]
LC11313-009A-U [AV-28H35BUE]
LC11562-002A-U [AV-28X37HKE]
LC11313-008A-U [AV-28X35HKE] LC11562-002A-U
REAR COVER LC11282-001C-U
LC11282-002B-U
[Only AV-28H35BUE]
LC11282-001C-U LC11282-001C-U
REMOTE CONTROL
UNIT RM-C54H-1C RM-C50H-1C [Only AV-28H35BUE] RM-C55H-1C RM-C55H-1C
TV EXT-1 EXT-3
EXT-2
EXT-4

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-7
2.3 DISASSEMBLY PROCEDURE
2.3.1 REMOVING THE REAR COVER
(1) Unplug the power cord.
(2) Remove the 13 screws [A] as shown in the Fig. 1.
(3) Withdraw the REAR COVER toward you.
2.3.2 REMOVING THE SIDE CONTROL JACK ASSEMBLY
• Remove the REAR COVER.
(1) Remove the screw [B] as shown in the Fig.1.
(2) While slightly raise the SIDE CONTROL JACK ASSY,
remove the 2 claws under the SIDE CONTROL JACK ASSY.
(3) Disconnect the connector [F] and [K] as shown in Fig. 2.
2.3.3 REMOVING THE SIDE CONTROL PWB
• Remove the REAR COVER.
• Remove the SIDE CONTROL JACK ASSY.
(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.
2.3.4 REMOVING THE CHASSIS
• Remove the REAR COVER.
(1) Slightly raise the both sides of the chassis by hand and
remove the 2 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.)
2.3.5 REMOVING THE POWER & DEF. PWB
• Remove the REAR COVER.
• Remove the CHASSIS.
(1) Remove the 3 screws [D] as shown in Fig. 1.
(2) Remove the POWER & DEF. PWB upper.
(If necessary, take off the wire clamp, connectors etc.)
2.3.6 REMOVING THE SIDE SPEAKER
• Remove the REAR COVER.
(1) Remove the 2 screws [E], and remove the SPEAKER
ADAPTER as shown in Fig. 1.
NOTE :
When removing the screws [E] of the speaker holder
remove the lower side screw first, and then remove the
upper one.
(2) Remove the 4 screws [F] attaching the SPEAKER.
(3) Follow the same steps when removing the other hand
SPEAKER.
2.3.7 REMOVING THE AV TERMINAL BOARD
• Remove the REAR COVER.
(1) Remove the 3 screws [G] as shown in the Fig. 1.
(2) Remove the 2 claws [H] under the CHASSIS as shown in
Fig. 3.
(3) Remove the AV TERMINAL BOARD slightly in the
direction of arrow [I] as shown in Fig. 3.
2.3.8 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 that 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.
• Before 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.
2.3.9 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 sure to tie the wires
with a new cable tie.
Fig.2
Fig.3
SIDE
CONTROL
PWB
Connector
F
K
(Back view)
C
C
AV SW PWB
AV
TERMINAL
BOARD
H
I
H

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-8 (No.52106)
Fig.1
FRONT CABINET
CRT SOCKET
PWB SPEAKER
ADAPTER SPEAKER
( x 2)
( x 4)
( x 3)
( x 13)
FRONT
CONTROL
PWB
POWER &
DEF. PWB
CHASSIS BASE
MICOM
PWB
AV SW
PWB
MAIN PWB
POWER CORD
AV TERMINAL
BOARD
REAR COVER
SIDE CONTROL JACK
ASSY
CLAW
CLAW
B
G
F
E
A
This exploded view describes about
AV-28X37SUE.
Although other models are slightly
different from this figure you can use
the exploded view for disassembling
other models in same step as AV-
28X37SUE.
C

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-9
2.3.10 REMOVING THE CRT
Note:
• Replacement of the CRT should be performed by 2 or more
persons.
• After removing the REAR 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
screwdriver as shown in Fig. 5.
Note:
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.
Note:
• 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.
Fig.4
Fig.5
Fig.6
CRT CHANGE TABLE
APPROX.
35cm
CLOTH
CRT
BOX
TYPE
SCREW
DRIVER
CRT
CHANGE
TABLE
CRT
CHANGE TABLE
CRT
CABINET

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-10 (No.52106)
2.4 REPLACEMENT OF MEMORY IC
2.4.1 MEMORY IC
This TV use memory IC. In the memory IC, there are memorized data for correctly operating the video and deflection circuits. When
replacing memory IC, be sure to use IC written with the initial values of data.
2.4.2 PROCEDURE FOR REPLACING MEMORY IC
Fig.1
Fig.2
PROCEDURE
1. Power off
Switch the power off and unplug the power cord from the outlet
2. Replace IC.
Be sure to use memory IC written with the initial data values.
3. Power on
Plug the power cord into the 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 values 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.
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.
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. 8. SURROUND
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT i
i
: EXIT
SYSTEM CONSTANT SET
1. DESTINATION EU
- /+ : STORE i : EXIT
OK
Names of key
INFORMATION
MUTING
FUNCTION UP/DOWN
MENU
FUNCTION -/+
key
OK
NAME OF REMOTE CONTROL KEY

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-11
2.4.3 SETTING VALUES OF SYSTEM CONSTANT SET (TABLE 1)
2.4.4 USER SETTING VALUES (TABLE 2)
Setting item Setting content
Setting value
AV-28X37SUE
AV-28X35HUE
AV-28H35SUE
AV-28H35BUE
AV-28X37HIE AV-28X37HKE
AV-28X35HKE
DESTINATION EU EI EK
CRT TYPE 16:09 16:09 16:09
PICTURE TILT NO NO NO
POWER BASS YES (X series) YES YES
NO (H series)
SPATIAL SURR YES (X series) YES YES
NO (H series)
PIC&TEXT YES (X series) YES YES
NO (H series)
PROGRESSIVE YES (X series) YES YES
NO (H series)
EK
EU EI
4:3
16:9
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
PICTURE SETTING SOUND SETTING
PICTURE MODE BRIGHT BASS Center
CONTRAST / BRIGHT
SHARP / COLOUR / HUE Refer to VSM PRESET TREBLE Center
BALANCE Center
COLOUR TEMP NORMAL HYPER SOUND OFF
PICTURE FEATURES DIGITAL SURROUND OFF
DIGITAL VNR AUTO 3D CINEMA SOUND (Only X series)
DIGIPURE PRO AUTO (Only X series) SURROUND MEDIUM
COLOUR SYSTEM TV : According to preset CH BASS BOOST MEDIUM
EXT : AUTO FEATURES
4:3 AUTO ASPECT PANORAMIC SLEEP TIMER OFF
BLUE BACK ON
EXT SETTING DECODER (EXT-2) OFF
ID BLANK INSTALL
S-IN BLANK LANGUAGE ENGLISH
DUBBING EXT-1 --> EXT-2 AUTO PROGRAM TV channel automatically set
EDIT/MANUAL PRESET CH only
The others : BLANK

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-12 (No.52106)
2.4.5 SERVICE MENU SETING ITEMS (TABLE 3)
Setting item Setting value Setting item Setting value
1. IF 1. VCO
2. ATT ON/OFF 5. VSM PRESET BRIGHT/SOFT/STD COOL/WARM/NOMAL
1.CONT.
2.BRIGHT
3.SHARP
4.COLOUR
5.HUE
1.WDR R
2.WDR G
3.WDR B
2. V / C 1.RGB BLK
2.CUTOFF R
3.CUTOFF G
4.CUTOFF B
5.WDR R
6.WDR G
7.WDR B
8.BRIGHT
9.CONTRAST
10.COLOUR
11.HUE
12.SHARP
13.SC ADJ.
14.SIDE.P.P
15.SIDE.P.W
6.STATUS
(Do not adjust) VPS PDC
3. AUDIO
(Do not adjust) 1.ERR LIMIT 2.A2 ID THR
3.SYSTEM
8. SURROUND
(Do not adjust) 1.CH CONFIG 2.MATRIX
3.REPROTECT I0
4.CENTER MODE
5.SPATIAL EFF
6.VIRTUAL EFF
7.BASS EFFECT
8.HARM
9.HPF
10.LPF
11.AMPLIMIT
12.LEVEL ADJ
13.SWC
14.SW HPF
15.VOLUME
16.HYPEREFFE
17.EFFECT MOD
18.HP-GAIN
4. DEF. 1.V-SHIFT
2.V-SIZE
3.H-CENT
4.H-SIZE
5.TRAPEZ
6.EW-PIN
7.COR-UP
8.COR-LO
9.COR-UP-S
10.COR-LO-S
11.ANGLE
12.BOW
13.V-S.CR
14.V-LIN
9.SHIPPING
(Do not adjust) ON/OFF

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-13
2.5 REPLACEMENT OF CHIP COMPONENT
2.5.1 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.
2.5.2 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.
2.5.3 REPLACEMENT STEPS
1. How to remove Chip parts
[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 the tweezers and remove the chip part.
[Transistors, diodes, variable resistors, etc.]
(1) Apply extra solder to each lead.
(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.
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.
(3) First solder lead Aas indicated in the figure.
(4) Then solder leads Band C.
SOLDER SOLDER
AB
C
A
B
C

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-14 (No.52106)
SECTION 3
ADJUSTMENT
3.1 ADJUSTMENT PREPARATION
(1) There are 2 ways of adjusting this TV : One is with the REMOTE CONTROL UNIT and the other is the conventional method
using adjustment parts and components.
(2) The adjustment using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values which
adjust the screen to the optimum condition can be different from the initial setting values.
(3) Make sure that connection is correctly made AC to AC power source.
(4) Turn on the power of the TV and measuring instruments for warning up for at least 30 minutes before starting adjustments.
(5) If the receive or input signal is not specified, use the most appropriate signal for adjustment.
(6) Never touch the parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service
adjustment.
(7) Preparation for adjustment. Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE
CONTROL UNIT.
3.2 MEASURING INSTRUMENT AND FIXTURES
(1) DC voltmeter (or digital voltmeter)
(2) Oscilloscope
(3) Signal generator (Pattern generator : PAL / SECAM / NTSC)
(4) Remote control unit
Item Preset value
PICTURE MODE (VSM) NORMAL
SLEEP TIMER OFF
TONE BALANCE Center
ZOOM FULL

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-15
3.3 ADJUSTMENT LOCATIONS
SIDE CONTROL PWB
TOP POWER
SW
FRONT
POWER
LED
D8801 IC8851
F8901 LF8901
W
POWER CORD
FRONT
MAIN PWB POWER&DEF PWB
FRONT CONTROL PWB
SR SL
HV
K B
B
F
G
X
R
IC701
R
G
SC VM
W
CN003 IC941
CN004
CN005
TOP
CRT SOCKET PWB
TP-E TP-47B E1
TP-Y
(SOLDER SIDE)
T551
HVT
1
5
1 B1
2 N.C.
3 X-ray
4 X-ray
5 GND
TUNER
AV JACK PWB
MICOM / 100Hz
PWB
F
K
FOCUS
FOCUS
SCREEN
SCREEN
CN001
CN002
FOCUS
SCREEN

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-16 (No.52106)
3.4 BASIC OPERATION OF SERVICE MENU
3.4.1 TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
3.4.2 SERVICE MENU ITEMS
With the SERVICE MENU, various adjustments can be made, and they are broadly classified in the following items of settings.
3.4.3 BASIC OPERATION IN SERVICE MENU
(1) HOW TO ENTER SERVICE MENU
Press the “INFORMATION” key and the “MUTING” key of the
REMOTE CONTROL UNIT simultaneously, and the SERVICE
MENU screen of Fig.1 will be displayed.
Fig.1
(2) SELECTION OF SUB MENU SCREEN
Press one of keys 1~5 of the REMOTE CONTROL UNIT and
select the SUB MENU SCREEN (See Fig. 3), form the
SERVICE MENU.
Fig.2
1.IF This mode adjusts the setting values of the IF circuit.
2.V/C This mode adjusts the setting values of the VIDEO / CHROMA circuit.
3.AUDIO This mode adjusts the setting values of the multiplicity SOUND circuit.
4.DEF This mode adjusts the setting values of the DEFLECTION circuit for each aspect mode given below.
5.VSM PRESET This mode adjusts the initial setting values of COOL, NORMAL and WARM. (VSM : Video Status Memory)
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. 8. SURROUND
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT i
i
: EXIT
SERVICE MENU SUB MENU
1. IF
2. V / C
3. AUDIO
4. DEF.
5. VSM PRESET
6. STATUS
7.
8. SURROUND
9. SHIPPING (OFF)
0. BUS FREE
:Donotadjust
Names of key
INFORMATION
MUTING
FUNCTION UP/DOWN
MENU
FUNCTION -/+
Key
OK
NAME OF REMOTE CONTROL KEY

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-17
Fig.3 SUB MENU SCREEN
SERVICE MENU
SC DEV
1. RGB BLK
2. V/C
PAL
- / + : STORE i : EXIT
DEF FULL 100Hz
1. V-SHIFT
4. DEF
- / + : STORE i : EXIT
1. V-SHIFT
2. V-SIZE
3. H-CENT
4. H-SIZE
5. TRAPEZ
6. EW-PIN
7. COR-UP
8. COR-LO
9. COR-UP-S
10. COR-LO-S
11. ANGLE
12.BOW
13.V-S.CR
14.V-LIN
IF SERVICE MENU
1. VCO
2. ATT ON/OFF
1-2 : SELECT i : EXIT
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. 8. SURROUND
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT : EXITi
1. ERR LIMIT
2. A2 ID THR
3. SYSTEM
AUDIO
3. AUDIO
1. ERR LIMIT 0010
C_AD_BITS =
ERROR LIMIT =
- / + : STORE i : EXIT
1.IF(VCO)
BRIGHT
STD
SOFT
5. VSM PRESET
VSM PRESET BRIGHT
1.CONT
- / + : STORE i : EXIT
1. CONT
2. BRIGHT
3. SHARP
4. COLOUR
5.HUE
1. WDR R
2. WDR G
3. WDR B
Do not move
Do not adjust
OK
OK
OK
PICTURE MODE
COOL
NORM
WARM
COLOR TEMP
1. RGB BLK
2. CUT OFF R
3. CUT OFF G
4. CUT OFF B
5. WDR R
6. WDR G
7. WDR B
12. SHARP
13. SC ADJ
14. SIDE .P.P
15. SIDE.P.W
8. BRIGHT
9. CONTRAST
10. COLOUR
11. HUE
OK

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-18 (No.52106)
(3) METHOD OF SETTING
1) METHOD OF SETTING 1.IF
[1.VCO] : It must not adjust without signal.
2) METHOD OF SETTING 2.V/C, 4.DEF AND 5.VSM PRESET.
Do not setting 3.AUDIO, 6.STATUS, 8.SURROUND, 9.SHIPPING (OFF) and 0.BUS FREE.
(4) RELEASE OF SERVICE MENU
After completing the setting, return to the SERVICE MENU, then again press the INFORMATION key.
Key Function
(a) [1] Select 1.IF
(b) [1] Select 1.VCO (CW)
Make sure that the arrow position between the ABOVE REF and BELOW REF.
(c) [INFORMATION] Return to the SERVICE MENU screen.
Key Function
(a) [2~5] Select one from 2.V/C, 3.AUDIO, 4.DEF and 5.VSM PRESET.
(b) FUNCTION UP /
DOWN ( ) Select setting items.
(c) FUNCTION -/+
( ) Set (adjust) the setting values of the setting items.
(d) OK Memorize the setting value.
(Before storing the setting values in memory, do not press the CH, TV, POWER ON
/ OFF key if you do, the values will not be stored in memory.)
(e) INFORMATION Return to the SERVICE MENU screen.

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-19
3.5 ADJUSTMENTS PROCEDURE
3.5.1 CHECK ITEM
Item Measuring
instrument Test point Adjustment part Description
B1 POWER
SUPPLY
check
Signal
generator
DC voltmeter
Remote
control unit
X connector
TP-91(B1)
TP-E( )
[POWER DEF
PWB]
[2.V/C]
1.RGB BLK (1) Receive a any broadcast. (2) Select the FULL mode.
(3) Select 2. V/C from the SERVICE MENU.
(4) Select 1. RGB BLK.
(5) Press the [function + ( )] key to find the cut off
screen (Black screen).
(6) Connect a DC voltmeter to TP-91(B1) and TP-E( ).
(7) Make sure that the voltage is DC139.9 ±2.0V.
(8) Press the [function - ( )] key to return to service
menu.
HIGH VOLTAGE
check Signal generator
HV voltmeter
Remote
control unit
CRT anode
Chassis GND
[2.V/C]
1.RGB BLK (1) Receive a any broadcast. (2) Select the FULL mode.
(3) Select 2. V/C from the SERVICE MENU.
(4) Select 1. RGB BLK.
(5) Press the [function + ( )] key to find the cut off
screen (Black screen).
(6) Connect a HV voltmeter to CRT ANODE and
chassis GND.
(7) Make sure that the voltage is DC 31.0kV (+1kV / -
1.5kV).
(8) Press the [function - ( )] key to return to service
menu.
IF VCO check Remote
control unit [1.IF] 1.VCO • Under normal conditions, no adjustment is required. • It must not adjust without broadcast signal.
(1) Select 1.IF from the SERVICE MENU.
(2) Then select 1.VCO from the 1.IF.
(3) Receive any broadcast.
(4) Check the arrow (<--) position between the ABOVE
REF. and BELOW REF.
1. VCO
2. ATT
i: EXIT
i: EXIT
IF SERVICE MENU
1-2 : SELECT
TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW
VCO(CW) **** MHz
Do not move

AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
1-20 (No.52106)
3.5.2 FOCUS ADJUSTMENT
3.5.3 VSM PRESET ADJUST SETTING
Item Measuring
instrument Test point Adjustment part Description
FOCUS
adjustment Signal generator FOCUS VR [In HVT] (1) Receive a cross-hatch signal. (2) Select the FULL mode.
(3) While watching the screen, adjust the FOCUS VR to
make the vertical and horizontal lines as fine and
sharp as possible.
(4) Make sure that when the screen is darkened, the
lines remain in good focus.
FOCUS
HVT
SCREEN
Item Measuring
instrument Test point Adjustment part Description
VSM PRESET
setting Remote control unit [5.VSM PRESET] (BRIGHT/SOFT/STD)
1. CONT.
2. BRIGHT
3. SHARP
4. COLOUR
5. HUE
(COOL/WARM/
NOMAL)
1. WDR R
2. WDR G
3. WDR B
(1) Select STD(standard) of PICTURE MODE with the
[MENU] key.
(2) Select 5.VSM PRESET.
(3) Adjust the FUNCTION UP/DOWN and -/+ key to
bring the set values of 1.CONT to 5. HUE to the
values shown in the table.
(4) Press the [MENU] key and memorize the set value.
(5) Respectively select BRIGHT or SOFT of PICTURE
MODE, and make similar adjustment as in 3 above.
(6) Press the [MENU] key and memorize the set value.
(7) Select COOL of COLOUR TEMP with the [MENU]
key.
(8) Select 5.VSM PRESET.
(9) Adjust the FUNCTION UP/DOWN and -/+ key to
bring the set values of 1.WDR R to 3. WDR B to the
values shown in the table.
(10) Press the [MENU] key and memorize the set value.
(11) Respectively select NORMAL or WARM of
PICTURE MODE, and make similar adjustment as in
9 above.
(12) Press the [MENU] key and memorize the set value.
* Refer to OPERATING INSTRUCTIONS for the
PICTURE MODE.
1.CONT. 2.BRIGHT 3.SHARP 4.COLOUR 5.HUE
+7 0 0 0 0
-3 0 -2 0 0
00000
BRIGHT
SOFT
STANDARD
1.WDR R 2.WDR G 3.WDR B
-15 -9 0
+4 0 0
000
COOL
WARM
NOMAL
VSM PRESET setting item