JVC AV-28KT1BUFA User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED No.52137
2003/9
COLOUR TELEVISION
5213720039AV-28KT1BUF/A, /B, /C,
AV-28KT1SUF/A, /B, /C
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
RM-C1100TV

1-2 (No.52137)
SPECIFICATION
Design & specifications are subject to change without notice.
Items Contents
Dimensions ( W ×H ×D ) 76cm ×57cm ×47.3cm
Mass 33kg
TV RF System B/G, D/K, L/L'
Colour System TV Mode PAL / SECAM
Video Mode PAL / SECAM / NTSC 3.58 / NTSC 4.43
Sound System NICAM / A2 (Germany system)
Teletext System FLOF (Fastext) / TOP (German system)
Tuning System Frequency synthesizer tuning system
Number of CH memory position 100 ch
Receiving
Frequency VHF Low 46.25MHz ~ 168.25MHz
VHF High 175.25MHz ~ 463.25MHz
UHF 471.25MHz ~ 863.25MHz
CATV S01-S41 & S75-S79
Intermediate
Frequency VIF 38.9MHz (B/G, D/K, L) / 33.9MHz (L')
SIF 33.4MHz (5.5MHz:B/G) / 32.9MHz (6.0MHz:D/K) / 32.4MHz (6.5MHz:L) / 40.4MHz (6.5MHz:L')
Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz)
Power Input AC220V ~ AC240V, 50Hz
Power Consumption 120W(Max), 3W(Standby)
Aerial Input Terminal 75Ωunbalanced, coaxial
Picture Tube Visible size : 66cm (Measured diagonally)
High Voltage 30kV
Speaker Main:5.7cm ×16cm oval type ×2
Audio Output 10W + 10W
Input Video 1V(p-p) 75Ω
S-Video Y : 1V(p-p) positive
C : 0.286V(p-p)
Audio (L/R) 500mV(rms) (-4dBs), High impedance (RCA pin jack ×2)
Output Video 1V(p-p) 75Ω
Audio (L/R) 500mV(rms), Low Impedance
Input Terminal Rear Side EXT-1 (Video / Audio / RGB)
EXT-2 (Video / Audio / RGB / S-VHS)
Right Side EXT-3 (Video / Audio)
Output Terminal Rear Side EXT-1 (Video / Audio)
EXT-2 (Video / Audio)
Right Side Headphone Jack (Stereo mini jack Ø3.5mm ×1)
Remote Control Unit VE-30017763 (RM-C1100), (AA/R06 dry battery ×2)

(No.52137)1-3
SECTION 1
PRECAUTION
1.1 SAFETY PRECAUTIONS
(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 B1 POWER SUPPLY check).
(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 10kΩ
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 1000Ωper volt or more
sensitivity in the following manner. Connect a 1500Ω
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 0.75V AC (r.m.s.). This corresponds to
0.5mA AC (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

1-4 (No.52137)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 21-pin Euro connector (SCART) : EXT-1 / EXT-2
(P-P= Peak to Peak, B-W= Blanking to white peak)
Pin No. Signal Designation Matching Value EXT-1 EXT-2
1 AUDIO R output 500mV(rms) (Nominal), Low impedance Used Used
2 AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2)
3 AUDIO L output 500mV(rms) (Nominal), Low impedance Used Used
4 AUDIO GND --- Used Used
5 GND (B) --- Used Used
6 AUDIO L input 500mV(rms) (Nominal), High impedance Used (L1) Used (L2)
7 B input 700mV(B-W), 75 ΩUsed Used
8 FUNCTION SW
(SLOW SW) Low : 0V-3V, High : 8V-12V, High impedance Used Used
9 GND (G) --- Used Used
10 SCL / T-V LINK --- Not used Used (SCL / TV-LINK)
11 G input 700mV(B-W), 75 ΩUsed Used
12 SDA3 --- Not used Not used
13 GND (R) --- Used Used
14 GND (YS) --- Used Used
15 R / C input R : 700mV(B-W), 75 Ω
C : 300mV(P-P), 75 ΩUsed (R) Used (C2/R)
16 Ys input
(FAST SW) Low : 0V-0.4V, 75 Ω High : 1V-3V, 75 ΩUsed Used
17 GND (VIDEO output) --- Used Used
18 GND (VIDEO input) --- Used Used
19 VIDEO output 1V(P-P) (Negative sync), 75 ΩUsed Used
20 VIDEO / Y input 1V(P-P) (Negative sync), 75 ΩUsed Used
21 COMMON GND --- Used Used
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
[Pin assignment]

(No.52137)1-5
2.2 FEATURES
• It is a remote controlled color television.
• 100 programs from VHF, UHF bands or cable channels can be
preset.
• It can tune cable channels.
• Controlling the TV is very easy by its menu driven system.
• It has two Euroconnector sockets for external device (such as
video recorder, video games, audio set, etc.)
• Side AV Input (EXT-3) available.
• Stereo sound systems (German + Nicam) are available.
• Full function Teletext (Fastext, Toptext).
• It is possible to connect headphone.
• Direct channel access.
• APS (Automatic Programming System).
• All programs can be named.
• Forward or backward automatic tuning.
• Sleep timer.
• Child Lock.
• Blue Background
•T-VLink
• Automatic sound mute when no transmission.
• 5 minutes after the broadcasting (close down), the TV switches
itself automatically to stand-by mode.
• WSS (Wide Screen Signaling)
• NTSC Playback.
2.3 MAIN DIFFERENCE LIST
2.4 DIFFERENCE LIST BY ELECTRONICS
2.5 DIFFERENCE LIST BY OSD LANGUAGE
Part Name AV-28KT1BUF AV-28KT1SUF
MODEL COLOUR BLACK MODEL SILVER MODEL
FRONT CABINET VE-20121492 VE-20119985
BACK COVER VE-20121494 VE-20111863
BACK DOOR VE-20108124 VE-20120043
FUNCTION BUTTON VE-20091798 VE-20096498
POWER BUTTON VE-20111864 VE-20120046
JVC LOGO VE-40013592 VE-40013593
CARTON BOX VE-50038917 VE-50038907
Part Name AV-28KT1BUF/A
AV-28KT1SUF/A AV-28KT1BUF/B AV-28KT1SUF/B AV-28KT1BUF/C AV-28KT1SUF/C
MAIN PWB VE-20120604 VE-20127801 VE-20127796
IC500 (MI-COM) VE-20139901 VE-20137151 VE-20139902
IC502 (MEMORY) VE-20120610 VE-20134092 VE-20126318
Part Name AV-28KT1BUF/A
AV-28KT1SUF/A AV-28KT1BUF/B AV-28KT1SUF/B AV-28KT1BUF/C AV-28KT1SUF/C
OSD LANGUAGES ENG, GER, FRE, ITA
SPA, DUT, POR, TUR ENG, GER, FRE, SWE NOR, DAN, FIN, GRE ENG, GER, CZE, POL HUN, BUL, ROM, CRO

1-6 (No.52137)
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDULE
3.1.1 REMOVING THE REAR COVER
(1) Unplug the power cord.
(2) Remove the 8 screws [A] as shown in the Fig. 1.
(3) Remove the 4 screws [B].
(4) Withdraw the REAR COVER toward you.
3.1.2 REMOVING THE BACK DOOR
• Remove the REAR COVER
(1) Remove the 2 screws [C].
(2) Withdraw the BACK DOOR toward you.
3.1.3 REMOVING THE SPEAKER
• Remove the REAR COVER.
(1) Remove the 4 screws [I], and remove the SPEAKER.
(2) Remove the other hand SPEAKER in the same steps.
3.1.4 REMOVING THE MAIN PWB
• Remove the REAR COVER.
• Remove the BACK DOOR.
(1) Remove the 4 screws [D].
(2) Slightly raise the both sides of the MAIN PWB by hand and
withdraw the MAIN PWB backward.
CAUTION:
If necessary, take off the wire clamp, connectors etc.
Be careful enough when developing a MAIN PWB.
3.1.5 REMOVING THE SIDE CONTROL PWB
• Remove the REAR COVER.
(1) Remove the 4 screws [E].
(2) Remove the SIDE PWB.
3.1.6 REMOVING THE BASE
• Remove the REAR COVER.
(1) Remove the 2 screws [F].
(2) Remove the BASE.
NOTE:
Work after fixing so that a CRT screen may be placed upside
down or it may not fall.
3.1.7 REMOVING THE POWER SWITCH PWB
• Remove the REAR COVER.
• Remove the BASE.
(1) Remove the 2 screws [G], and remove the POWER
SWITCH PWB.
3.1.8 REMOVING THE LED PWB
• Remove the REAR COVER.
• Remove the BASE.
• Remove the POWER SWITCH PWB.
(1) Remove the 2 screws [H], and remove the LED PWB.
3.1.9 CHECKING THE PW BOARD
• To check the back side of the PW Board.
(1) Pull out the PW Board. (Refer to REMOVING THE MAIN
PWB).
(2) Erect the PW Board vertically so that you can easily check
the back side of the PW Board.
3.1.10 CAUTION
• When erecting the PW Board, 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.
3.1.11 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.

(No.52137)1-7
Fig.1
x4
x2
x4
x4
x4 x4
x2
x2
x2
x8
LED PWB
POWER SWITCH PWB
MAIN PWB
BASE
REAR COVER
BACK DOOR
CRT SOCKET PWB
SPEAKER
SIDE CONTROL
PWB
B
A
C
D
E
F
H
G
I
I

1-8 (No.52137)
3.2 REPLACEMENT OF CHIP COMPONENT
3.2.1 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.
3.2.2 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.
3.2.3 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
A
B
C
A
B
C

(No.52137)1-9
3.3 SETTING OF THE LAST MEMORY FOR SHIPMENT
3.3.1 USER SETTING VALUES
3.3.2 SETTING A.P.S. (AUTO STORE)
(1) Press [MENU] key on the remote control unit to display the main menu.
(2) Press [/] keys to select PROGRAM item, them [/] keys to display the PROGRAM menu.
(3) Press the [BLUE] key to enter the AUTOSTORE mode.
(4) Press [/] keys to choose the COUNTRY, then press [/] keys the choose country you are nou located.
(5) Press [/] keys to choose the CONTINUE, then press [] key to start A.P.S. The following message appears.
NOTE:
To cancel the A.P.S., press the [STANDARD] key.
(6) After A.P.S. is finalized, the PROGRAM menu appears again.
(7) Press [STANDARD] key to exit main menu.
Setting Item Setting Value Setting Item Setting Value
SOUND MENU FEATURE MENU
BALANCE CENTER SLEEP TIMER OFF
BASS CENTER CHILD LOCK OFF
TREBLE CENTER LANGUAGE ENGLISH
HYPER SOUND OFF EXT-2 OUTPUT TV
PICTURE MENU BLUE BACKGROUND ON
BRIGHTNESS These adjust are automatically
restoredwhenA.P.S.bitin Service
menu is set.
The procedure for setting APS
bit is described bellow.
INSTALL. MENU
CONTRAST PROGRAMME Refer to instruction book
COLOUR BAND
SHARPNESS CHANNEL
HUE (only NTSC) STANDARD
PICTURE MODE USER COLOUR SYSTEM
COLOUR TEMP NORMAL DECODER (EXT-2)
ZOOM AUTO FINE TUNING
SEARCH
STORE

1-10 (No.52137)
SECTION 4
ADJUSTMENT
4.1 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 below.
(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 procedures after waiting at least
30 minutes.
(5) Unless otherwise 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,
preset the following functions with the remote control unit:
4.2 MEASURING EQUIPMENT
(1) DC voltmeter (or digital voltmeter)
(2) Signal generator (Pattern generator)
[PAL / SECAM / NTSC]
(3) Remote control unit
4.3 ADJUSTMENT ITEM
• SCREEN ADJUSTMENT
• DEFLECTION CIRCUIT ADJUSTMENT
• WHITE BALANCE ADJUSTMENT
4.4 ADJUSTMENT LOCATIONS
Setting Item Setting value
BRIGHTNESS CENTER
CONTRAST
COLOUR
SHARPNESS
COLOUR TEMP
ZOOM AUTO
VIDEO
HEADPHONE
MENU
P/Ch
SIDE CONTROL PWB
TUNER
TU200
IC502 (MEMORY)
IC500 (MI-COM)
MAIN PWB
FRONT
TOP
FBT
UPPER : FOCUS
LOWER : SCREEN

(No.52137)1-11
4.5 BASIC OPERATION OF SERVICE MENU
4.5.1 HOW TO ENTER THE SERVICE MENU
(1) Press the [INFORMATION] key and [MUTING] key
simultaneously in the main menu, and the SERVICE
MENU screen (Fig.1) will be displayed.
Fig.1
(2) While the SERVICE MENU screen is displayed, press the
[/] and [/] key and select the "ADJUST...", then
ADJUST MENU sucreen (Fig.2) will be displayed.
Fig.2
4.5.2 SELECTION OF ADJUSTMENT ITEMS
(1) Enter the SERVICE MENU and select ADJUST.
(2) Press the [/] key and select the ADJUSTMENT ITEM.
(3) Press the [/] key and set the SETTING VALUE.
(4) Changed values are stored automatically.
4.5.3 HOW TO EXIT SERVICE MODE
(1) Press the [MENU] key.
SERVICE
ADJUST...
OPTIONS...
AK45JA***
AK45JA***
SERVICE MENU
Select for adjustment Do not adjust
ADJUST...
SETTING ITEM No. SETTING VALUE
000
001
002
003
004
005
006
007
008
009
***
***
***
***
***
***
***
***
***
***
ADJUST MENU
MUTING key
REMOTE CONTROL UNIT key NAME
INFORMATION key
UP / DOWN
[ ] key
MENU key
LEFT / RIGHT
[ ] key

1-12 (No.52137)
4.5.4 SERVICE MENU SCREEN
NOTE:
Do not adjust the OPTIONS MENU. If you change the setting value, the set will not function correctly.
Do Not Adjust
SERVICE
ADJUST...
OPTIONS...
AK45JA***
AK45JA***
SERVICE MENU
ADJUST...
SETTING ITEM No.
000~143
SETTING VALUE
000
001
002
003
004
005
006
007
008
009
***
***
***
***
***
***
***
***
***
***
ADJUST MENU
OPTIONS..
SETTING ITEM No.
000~063
SETTING VALUE
000
001
002
003
004
005
006
007
008
009
**
**
**
**
**
**
**
**
**
**
********
********
********
********
********
********
********
********
********
********
OPTIONS MENU

(No.52137)1-13
ADJUSTMENT ITEM
adjustment No. adjustment part description
000 White Point RED Not used
001 White Point GREEN Not used
002 Whit Point BLUE Not used
003 AGC (Automatic Gain Control)
004 IF-PLL Negative Not used
005 IF-PLL Positive Not used
006 Y-Delay
007 Y-Delay SECAM
008 Y-Delay NTSC
009 Y-Delay OTHER Not used
010 Vertical Position Offset Fixed
011 Vertical Amplitude Offset Fixed
012 Horizontal Position Offset Fixed
013 Horizontal Amplitude Offset Fixed
014 Vertical Blank Start (It will be used only at 4:3 tube for 16:9 mode adjustment)
015 Vertical Blank Stop (It will be used only at 4:3 tube for 16:9 mode adjustment)
016 Angle
017 Bow
018 4:3 Horz. Blank Start Do not adjust
019 4:3 Horz. Blank Stop Do not adjust
020 EHTV compensation
021 EHTTM compensation
022 EHTEW compensation
023 WDR Video processor
adjust itself.
024 WDG
025 WDB
026 CR
027 CG
028 CB
029 COR coring level
030 REGULAR VERT_POS (Vertical Position)
031 REGULAR VERT_AMPL (Vertical Amplitude)
032 REGULAR VERT_SCOR (Vertical S Correction)
033 REGULAR VERT_SSYM (Vertical S Symmetry)
034 REGULAR TRAPEZE
035 REGULAR CUSHION
036 REGULAR HOR_COR_SYM(Horizontal Corner Symmetry)
037 REGULAR HOR_CORNER (Horizontal Corner)
038 REGULAR HORZ_POS (Horizontal Position)
039 REGULAR HORZ_AMPL (Horizontal Amplitude)
040 PANORAMIC VERT_POS Not used
041 PANORAMIC VERT_AMPL Not used
042 PANORAMIC VERT_SCOR Not used
043 PANORAMIC VERT_SSYM Not used
044 PANORAMIC TRAPEZE Not used
045 PANORAMIC CUSHION Not used
046 PANORAMIC HOR_COR_SYM Not used
047 PANORAMIC HOR_CORNER Not used
048 PANORAMIC HORZ_POS Not used

1-14 (No.52137)
049 PANORAMIC HORZ_AMPL Not used
050 14:9 ZOOM VERT_POS Not used
051 14:9 ZOOM VERT_AMPL Not used
052 14:9 ZOOM VERT_SCOR Not used
053 14:9 ZOOM VERT_SSYM Not used
054 14:9 ZOOM TRAPEZE Not used
055 14:9 ZOOM CUSHION Not used
056 14:9 ZOOM HOR_COR_SYM Not used
057 14:9 ZOOM HOR_CORNER Not used
058 14:9 ZOOM HORZ_POS Not used
059 14:9 ZOOM HORZ_AMPL Not used
060 16:9 ZOOM VERT_POS Not used
061 16:9 ZOOM VERT_AMPL Not used
062 16:9 ZOOM VERT_SCOR Not used
063 16:9 ZOOM VERT_SSYM Not used
064 16:9 ZOOM TRAPEZE Not used
065 16:9 ZOOM CUSHION Not used
066 16:9 ZOOM HOR_COR_SYM Not used
067 16:9 ZOOM HOR_CORNER Not used
068 16:9 ZOOM HORZ_POS Not used
069 16:9 ZOOM HORZ_AMPL Not used
070 16:9 ZOOM SUBTITLE VERT_POS Not used
071 16:9 ZOOM SUBTITLE VERT_AMPL Not used
072 16:9 ZOOM SUBTITLE VERT_SCOR Not used
073 16:9 ZOOM SUBTITLE VERT_SSYM Not used
074 16:9 ZOOM SUBTITLE TRAPEZE Not used
075 16:9 ZOOM SUBTITLE CUSHION Not used
076 16:9 ZOOM SUBTITLE HOR_COR_SYM Not used
077 16:9 ZOOM SUBTITLE HOR_CORNER Not used
078 16:9 ZOOM SUBTITLE HORZ_POS Not used
079 16:9 ZOOM SUBTITLE HORZ_AMPL Not used
080 OSD Position
081 BCLTHR Beam current threshold
082 BCLG Beam current loop gain
083 ROTATION (TILT)
084 LSLSA Luma soft limiter Fixed
085 LSLSB Luma soft limiter Fixed
086 LSL2 Luma soft limiter Fixed
087 LSLTA Luma soft limiter Fixed
088 LSLTB Luma soft limiter Fixed
089 REFERENCE WDR RED (NORMAL)
090 REFERENCE WDR GREEN (NORMAL)
091 REFERENCE WDR BLUE (NORMAL)
092 REFERENCE CUTOFF RED Fixed
093 REFERENCE CUTOFF GREEN Fixed
094 REFERENCE CUTOFF BLUE Fixed
095 IBRM
096 WDRV
097 ACC_SAT (COLOUR OFFSET)
098 G2_CUTOFF_REFERENCE Fixed
adjustment No. adjustment part description

(No.52137)1-15
099 G2_WDR_REFERENCE Fixed
100 POFS2 (RGB HORIZANTAL SHIFT)
101 REFERENCE WDR RED COOL
102 REFERENCE WDR GREEN COOL
103 REFERENCE WDR BLUE COOL
104 REFERENCE WDR RED WARM
105 REFERENCE WDR GREEN WARM
106 REFERENCE WDR BLUE WARM
107 STANDARD MODE BRIGHTNESS
108 STANDARD MODE COLOUR
109 STANDARD MODE CONTRAST
110 FULL VERT_POS (16:9 MODE)
111 FULL VERT_AMPL
112 FULL VERT_SCOR
113 FULL VERT_SSYM
114 FULL TRAPEZE
115 FULL CUSHION
116 FULL HOR_COR_SYM
117 FULL HOR_CORNER
118 FULL HORZ_POS
119 FULL HORZ_AMPL
120 BRIGHT MODE BRIGHTNESS
121 BRIGHT MODE COLOUR
122 BRIGHT MODE CONTRAST
123 SOFT MODE BRIGHTNESS
124 SOFT MODE COLOUR
125 SOFT MODE CONTRAST
126 PERSONAL MODE FACTORY SETTING BRIGHTNESS Fixed
127 PERSONAL MODE FACTORY SETTING COLOUR Fixed
128 PERSONAL MODE FACTORY SETTING CONTRAST Fixed
129 SCINC FOR PANORAMIC MODE
130 SCINC1 FOR PANORAMIC MODE
131 VOLUME AFTER APS
132 VERTICAL SCROLL
133 14:9 HORIZONTAL START Not used
134 14:9 HORIZONTAL STOP Not used
135 4:3 RGB HORIZONTAL AMPLITUDE
136 4:3 RGB CUSHION
137 14:9 RGB HORIZONTAL AMPLITUDE Not used
138 14:9 RGB CUSHION Not used
139 PANAROMIC RGB HORIZONTAL AMPLITUDE Not used
140 16:9 RGB HORIZONTAL AMPLITUDE Not used
141 16:9 SUBTITLE RGB HORIZONTAL AMPLITUDE Not used
142 FULL RGB HORIZONTAL AMPLITUDE
143 TELETEXT HORIZONTAL POSITION
adjustment No. adjustment part description

1-16 (No.52137)
4.6 ADJUSTMENT PROCEDURE
4.6.1 FOCUS / SCREEN ADJUSTMENT
4.6.2 AGC ADJUSTMENT
Item Measuring
instrument Test point Adjustment part Description
FOCUS
adjustment Signal generator
Remote
control unit
FOCUS VR
[On the FBT] (1) Receive a PAL cross-hatch signal. (2) Adjust FOCUS VR on the FBT as thin as possible.
SCREEN
adjustment Remote control unit SCREEN VR [On the FBT] (1) Enter the OPTIONS MENU. (2) Select option No.002 and change bit 6 from 0 to 1
disabling vertical scan. Then horizontal line appears.
(3) Adjust horizontal line as thin as possible via screen
adjust pot.
(4) Press number 0 key to leave service menu.
Item Measuring
instrument Test point Adjustment part Description
AGC
adjustment Signal generator
Remote
control unit
Volt meter
003 (1) Receive a PAL BG signal at 60dBµV RF signal level.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 003.
(5) Adjust 003 by pressing till voltage at pin 1 of TUNER
is equal to 3.0V.
FBT
FOCUS VR
SCREEN VR

(No.52137)1-17
4.6.3 DEFLECTION CIRCUIT ADJUSTMENT
Item Measuring
instrument Test point Adjustment part Description
VERTICAL
POSITION
adjustment
Signal
generator
Remote
control unit
030
110 (16:9 mode)
(1) Receive a PAL circle pattern signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 030.
(5) Adjust 030 to make A=B.
(6) Check and readjust 030 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 110 (16:9 mode).
(8) Adjust 110 in the same procedure.
VERTICAL SIZE
adjustment Signal generator
Remote
control unit
031
111 (16:9 mode)
(1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 031.
(5) Adjust 031 until horizontal black lines on both the
upper and lower part of the cross-hatch pattern
become very closeted the upper and lower
horizontal sides of picture size and nearly about to
disappear.
(6) Check and readjust 031 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 111 (16:9 mode).
(8) Adjust 111 in the same procedure.
VERTICAL
S-CORRECTION
& LINEARITY
adjustment
Signal
generator
Remote
control unit
032
033
112 (16:9 mode)
113 (16:9 mode)
(1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 032.
(5) Adjust 032 till the size of squares on both the upper
and lower part of cross-hatch pattern become equal
to the squares laying on the vertical center of the
cross-hatch pattern.
(6) Check and readjust 032 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 033.
(8) Adjust 033 till all the size of squares of the cross-
hatch pattern become in equal size from the top of
the screen to its bottom of the whole screen.
(9) Check and readjust 033 item if the adjustment
becomes improper after some other geometric
adjustments (especially after than S-COR
adjustment) are done.
(10) Select 112 (16:9 mode).
(11) Adjust 112 in the same procedure as 5.
(12) Select 113 (16:9 mode).
(13) Adjust 113 in the same procedure as 8.
Screen
size
Very close
Very close
Picture
size
100%
UPPER
CENTER
LOWER

1-18 (No.52137)
HORIZONTAL
POSITION
adjustment
Signal
generator
Remote
control unit
038
118 (16:9 mode)
(1) Receive a PAL circle pattern signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 038.
(5) Adjust 038 to make C=D.
(6) Check and readjust 038 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 118 (16:9 mode).
(8) Adjust 118 in the same procedure.
HORIZONTAL
SIZE
adjustment
Signal
generator
Remote
control unit
039
119 (16:9 mode)
(1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 039.
(5) Adjust 039 until vertical lines on both the left and
right part of the cross-hatch will be visible nor screen
will be so wide.
(6) Check and readjust 039 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 119 (16:9 mode).
(8) Adjust 119 in the same procedure.
ANGLE
adjustment Signal generator
Remote
control unit
016 (1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 016.
(5) Adjust 016 till the vertical lines of the cross-hatch
pattern become straight.
(6) Check and readjust 016 item if the adjustment
becomes improper after some other geometric
adjustments are done.
Item Measuring
instrument Test point Adjustment part Description
CD
Screen size
Very
close
Very
close
Picture size 100%

(No.52137)1-19
BOW
adjustment Signal generator
Remote
control unit
017 (1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 017.
(5) Adjust 017 till the vertical lines become straight.
(6) Check and readjust 017 item if the adjustment
becomes improper after some other geometric
adjustments are done.
NOTE:
In case where there is a bow-shaped distortion of
images on the screen. (Figure)
TRAPEZIUM
adjustment Signal generator
Remote
control unit
034
114 (16:9 mode)
(1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 034.
(5) Adjust 034 till vertical lines, especially lines at the
sides of the picture frame become parallel to the
both sides of picture tubes as close as possible.
(6) Check and readjust 034 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 114 (16:9 mode).
(8) Adjust 114 in the same procedure.
SIDE PIN
adjustment Signal generator
Remote
control unit
035
115 (16:9 mode)
(1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 035.
(5) Adjust 035 till vertical lines close to the both sides of
the picture frame become parallel to vertical sides of
picture tube without any bending to left or to right
side of the screen.
(6) Check and readjust 035 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 115 (16:9 mode).
(8) Adjust 115 in the same procedure.
Item Measuring
instrument Test point Adjustment part Description
Parallel
Parallel

1-20 (No.52137)
CORNER
adjustment Signal generator
Remote
control unit
036
037
116 (16:9 mode)
117 (16:9 mode)
(1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 036.
(5) Adjust 036 till vertical lines at the upper corners of
the picture frame become vertical and parallel to
vertical corner sides of picture tube.
(6) Check and readjust 036 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 037.
(8) Adjust 037 till vertical lines at the lower corners of the
picture frame become vertical and parallel to vertical
corner sides of picture tube.
(9) Check and readjust 037 item if the adjustment
becomes improper after some other geometric
adjustments are done.
(10) Select 116 (16:9 mode).
(11) Adjust 116 in the same procedure as 5.
(12) Select 117 (16:9 mode).
(13) Adjust 117 in the same procedure as 8.
ROTATION
adjustment Signal generator
Remote
control unit
083 (1) Receive a PAL cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 083.
(5) Adjust 083 to rotate the complete master clock-wise
and counter clock-wise depending on the CRT.
(6) Check and readjust 083 item if the adjustment
becomes improper after some other geometric
adjustments are done.
NTSC
HORIZONAL
SIZE
adjustment
Signal
generator
Remote
control unit
135
142 (16:9 mode)
(1) Receive a NTSC cross-hatch signal.
(2) Enter the SERVICE MENU.
(3) Select ADJUST MENU.
(4) Select 135.
(5) Adjust 135 till vertical lines on both the left and right
part of the cross-hatch will be visible nor screen will
be so wide.
(6) Check and readjust TRAPEZ item if the adjustment
becomes improper after some other geometric
adjustments are done.
(7) Select 142 (16:9 mode).
(8) Adjust 142 in the same procedure.
Item Measuring
instrument Test point Adjustment part Description
Straight Straight
Screen size
Very
close
Very
close
Picture size 100%