181 Channels
[Reception of channel A-5 ("95" of the TV set’s on-screen CABLE channel) is
recommended for your TV set.]
45.75 MHz
41.25 MHz (4.5 MHz)
RCA pin jack × 3
Y : 1V(p-p), 75 Ω, negative sync
Pb/Pr : 0.7 V(p-p), 75 Ω
Mini DIN 4-pin × 1
Y : 1 V(p-p), 75 Ω, negative sync
C : 0.286 V(p-p)(burst signal), 75 Ω
1 V(p-p), 75 Ω, negative sync, RCA pin jack × 2
500 mV(rms)(-4dBs), high impedance, RCA pin jack × 6
RCA pin jack × 2
Design & specifications are subject to change without notice.
1-2 (No.YA245)
Page 3
SECTION 1
PRECAUTION
1.1SAFETY 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) Use isolation transformer when hot chassis.
The chassis and any sub-chassis contained in some products are
connected to one side of the AC power line. An isolation
transformer of adequate capacity should be inserted between the
product and the AC power supply point while performing any
service on some products when the HOT chassis is exposed.
(5) Don't short between the LIVE side ground and ISOLATED (NEU-
TRAL) 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.
(6) 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).
(7) 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.
(8) 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
(9) 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.
Ω 2W resistor to the anode button.
(10) 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 1100V AC
(r.m.s.) for a period of one second.
(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rat-
ed 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
following manner. Connect a 1500
a 0.15
µF AC-type capacitor between an exposed metal part
Ω per volt or more sensitivity in the
Ω 10W resistor paralleled by
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)
0.15 F AC-TYPE
PLACE THIS PROBE
1500 10W
(11) High voltage hold down circuit check.
GOOD EARTH GROUND
ON EACH EXPOSED
ME TAL PAR T
After repair of the high voltage hold down circuit, this circuit shall
be checked to operate correctly.See item "How to check the highvoltage hold down circuit".
This mark shows a fast
operating fuse, the
letters indicated below
show the rating.
A V
POWER CORD
REPLACEMENT WARNING.
Connecting the white line side of power
cord to "WHT" character side.
PWB
White line side
WHT
PW
(No.YA245)1-3
Page 4
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1FEATURES
SMART CAPTION
Smart caption will appear when you press the MUTING button,
only on channels where the broadcast contains CLOSED
CAPTION information.
SMART SOUND
Decreases high sound levels, giving a regulated sound level.
VIDEO STATUS
Expression of a favorite screen can be chosen by the VIDEO
STATUS function.
COMPONENT INPUT
Since the component signal input terminal is equipped, it
reappears direct without deteriorating the signal from DVD.
V-CHIP
Since the V-CHIP is built in, it can choose, view and listen to a
healthy program.
2.2TECHNICAL INFORMATION
2.2.1 MAIN MI-COM (CPU) PIN FUNCTION
Pin
Pin name I/OFunction
No.
1 MTS_ADJI Not used29 YC_GND- GND
2 AFT1I AFT voltage for tuner (Tuning frequency control)30 V1_INI Not used
3 KEYI Key scan for front control [No signal: H]31 ABCLI Current for automatic beam (brightness)/contrast limit
4 uP_DVss- GND32
5 ResetI CPU reset [Reset: L]33 BLACK_DET - Black level detection filter
6 8MHz_OUT O CPU system clock: 8MHz oscillation34 SVM_OUTO Y signal for scan velocity scan modulation
7 8MHz_INI CPU system clock: 8MHz oscillation35 APL_FIL- Average picture level filter
8 TEST- GND36 APC_FIL- Automatic phase control filter
9 uP_DVDDI 5V37 fsc_OUTO Color sub carrier (3.58MHz) for 3-line digital comb filter [IC5201]
10 AGC_MUTE O AGC muting for tuner (when channel select) [Muting : H]38 YC_VccI 5V (for video process circuit)
11 uP_VVSS- GND39 R_OUTO R signal for CRT output
12 TV_HGND- GND40 G_OUTO G signal for CRT output
13 FBP_SCPI Flyback pulse (H. pulse)41 B_OUTO B signal for CRT output
14 HOUTO H. drive (oscillation)42 RGB_VccI 9V (for RGB process circuit)
15 H_VccI 9V (for H. oscillation start)43 IK_INI Not used
16 HAFC_1- H. AFC filter44 TV_DGND- GND
17 Vsaw- V. saw filter45 uP_AGND- GND
18 VOUTO V. drive 46 uP_AVdd- 5V
19 EW_OUTO Parabola waveform (for sidepin correection)47 MAIN_POWER O Power on/off switching control [Powen on: L]
20 X-RAYI X-ray detection (for protection) [Detection : H]48 PANORAMAI Not used: Aspect size control [PANORAMA: L]
21 YsI Not used49 SDA0I/O Data for Inter IC control bus (for various devices)
22 Cb_INI Cb (external) signal50 SCL0O Clock for Inter IC control bus (for various devices)
23 Y_INI Y (external) signal 51 SDA1I/O Data for Inter IC control bus (for main memory)
25 TV_DVccI 3.3V 53 SCL1O Clock for Inter IC control bus (for main memory)
26 V3IN/CINI Chroma signal (for YC separation output)54 LEDO POWER / ON TIMER LED lndication [lighting : L]
27 EHT_INI Not used55 REMOCONI Remote control sensor input [No input : H]
28 V2_IN/Y_IN I Y signal (for YC separatio n ou tput)56 ASP_ABLI Not used
MTS STEREO
The voice multiplex function of the MTS system is built in.
(MTS = Multi channel Television Sound system)
RETURN PLUS
You program a specific channel to return to while scanning
through the channels using the CH+ and CH - keys.
VIDEO INPUT LABEL
This function is used to label video input connections for the
onscreen displays.
WORLD CLOCK
The world clock feature provides time differences for some of
the major cities around the world in real time.
HYPER SURROUND
Creates a deep, three-dimensional sound effect by channeling
the audio through the TV's front-firing speakers.
Pin
Pin nameI/OFunction
No.
MONITOR_OUT
O Not used
1-4 (No.YA245)
Page 5
SECTION 3
DISASSEMBLY
3.1DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER
(1) Unplug the power plug.
(2) Remove the 7 screws [A].
(3) Remove the 4 screws [B].
(4) Withdraw the REAR COVER toward you.
3.1.2 REMOVING THE MAIN PWB
• Remove the REAR COVER.
(1) Raise the backside of the MAIN PWB, and remove the
PWB STOPPER [C] from the cabinet.
(2) Withdraw the MAIN PWB backward. (If necessary, remove
the wire clamp, connectors etc.)
3.1.3 REMOVING THE SPEAKER
• Remove the REAR COVER.
(1) Remove the 2 screws [D], then remove the SPEAKER.
(2) Follow the same steps when remove the other hand
SPEAKER.
3.1.4 CHECKING THE MAIN PWB
To check the PW Board from back side.
(1) Pull out the MAIN PWB (refer to REMOVING THE MAIN
PWB ).
(2) Erect the MAIN PWB vertically with the HVT side facing
up so that you can easily check the back side of the MAIN
PWB.
CAUTION :
• When erecting the MAIN PWB, 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 PWB.
3.1.5 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.YA245)1-5
Page 6
FRONT CABINET
D
SPEAKER
CRT SOCKET PWB
HVT
MAIN PWB
C
REAR COVER
1-6 (No.YA245)
B
A
POWER CORD
Fig.1
Page 7
3.2MEMORY IC REPLACEMENT
• This model uses the memory IC.
• This memory IC stores data for proper operation of the video and drive circuits.
• When replacing, be sure to use an IC containing this (initial value) data.
3.2.1 MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug.
2. Replace the memory IC
Be sure to use a memory IC written with the initial setting data.
3. Power on
Connect the power cord to the wall outlet and switch on the
power.
4. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE)
and set the receive channels (Channels Preset) as described.
5. User settings
Check the user setting items according to the "FACTORY
SETTING ITEM" table.
Where these do not agree, refer to the OPERATING
INSTRUCTIONS (USER'S GUIDE) and set the items as
described.
6. SERVICE MODE setting
Verify what to set in the SERVICE MODE, and set whatever is
necessary(Fig.1) .
Refer to the SERVICE ADJUSTMENT for setting.
3.2.2 SERVICE MODE SETTING ITEMS
SERV ICE MENU
1.
V/C(S)
3.
SOUND(A)
5.
3L Y/C(LYC)
7.
LOW LIGHT
9.
VCO
11.
I2C BUS
SELECT BY
OPERATE BY
2.
DEF(D)
4.
OTHERS(F)
8.
HIGH LIGHT
12.
SYSTEM(SYS)
EXIT BY
Fig.1
Setting itemsSettingsItem No.
1. V/C(S)
(Video setting)
2. DEF(D)
(Deflection setting)
3. SOUND(A)
(Audio setting)
4. OTHERS [Do not adjust]
(Factory setting)
5. 3L Y/C(LYC) [Do not adjust]
(Y/C separate setting)
7. LOW LIGHT
(White balance setting)
8. HIGH LIGHT
(White balance setting)
9. VCO
(VCO setting)
11. I2C BUS [Do not adjust]
2
C BUS setting)
(I
12.SYSTEM (SYS)
(System constant setting)
AdjustS01~S48
AdjustD01~D33
AdjustA01~A08
FixedF01~F18
FixedLYC01~LYC12
Adjust---
Adjust---
Adjust---
Fixed---
FixedSYS01~SYS26
EXIT
(No.YA245)1-7
Page 8
3.2.3 SETTINGS OF FACTORY SHIPMENT
3.2.3.1BUTTON OPERATION3.2.3.2REMOTE CONTROL DIRECT OPERATION
Setting itemSetting position
POWEROff
CHANNELCH-02
VOLUME10
3.2.3.3REMOTE CONTROL MENU OPERATION
(1) PICTURE ADJUST
INPUTTV
CHANNELCH-02
VOLUME10
MUTINGOFF
DISPLAYOFF
SLEEP TIMEROFF
VIDEO STATUSDYNAMIC
ASPECT4 : 3
SOUNDHYPER SURROND OFF
(3) CLOCK / TIMERS
Setting itemSetting position
Setting itemSetting position
TINT0
COLOR0
PICTURE+8
BRIGHT0
DETAIL+8
COLOR TEMPERATUREHIGH
NOISE MUTINGON
(2) SOUND ADJUST
Setting itemSetting position
BASS0
TREBLE0
BALANCE0
MTSSTEREO
SMART SOUNDOFF
Setting itemSetting position
SET CLOCKOFF
ON / OFF TIMEROFF
(4) INITIAL SETUP
Setting itemSetting position
LANGUAGEENG.
CLOSED CAPTION OFF(CC1/T1)
FRONT PANEL LOCKOFF
AUTO SHUT OFFOFF
XDS ID ON
V-CHIPOFF
1-8 (No.YA245)
Page 9
3.3REPLACEMENT OF CHIP COMPONENT
3.3.1 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.
3.3.2 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.
3.3.3 REPLACEMENT STEPS
1. How to remove Chip parts
2. How to install 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.
SOLDER
SOLDER
[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 A as indicated in the figure.
(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.
A
B
C
(4) Then solder leads B and C.
A
B
C
(No.YA245)1-9
Page 10
SECTION 4
ADJUSTMENT
4.1ADJUSTMENT 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
warming 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.
4.2PRESET SETTING BEFORE ADJUSTMENTS
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
ItemPreset value
VIDEO STATUSSTANDARD
PICTURE adjustmentAll 00
COLOR TEMPERATURELOW
SOUND adjustmentAll 00
HYPER SORROUNDOFF
ASPECT4 : 3
4.3MEASURING INSTRUMENT AND FIXTURES
• DC voltmeter (or digital voltmeter)
• Oscilloscope
• Signal generator (Pattern generator) [NTSC]
• TV audio multiplex signal generator
• Remote control unit
4.4ADJUSTMENT ITEMS
CHECK ITEM
• B1 VOLTAGE check
• HIGH VOLTAGE HOLD DOWN check
FOCUS
• FOCUS adjustment
DEFLECTION CIRCUIT
• V. SIZE / V. POSITION (4:3) adjustment
• V. SIZE / V. POSITION (16:9) adjustment
• H. POSITION / H. SIZE / SIDE PIN (4:3) / (16:9) adjustment
VIDEO CIRCUIT
• WHITE BALANCE(High Light & Low Light) adjustment
• SUB BRIGHT adjustment
• SUB CONTRAST adjustment
MTS CIRCUIT
• MTS INPUT LEVEL adjustment
• MTS SEPARATION adjustment
1-10 (No.YA245)
Page 11
4.5ADJUSTMENT LOCATIONS / WIRING
CRT SOCKET PWB
(SOLDER SIDE)
TOP
TP-B
MAIN PWB
PW
F901
FUSE
POWER
CORD
DEG
T
TP-E
E1
DEG. COIL
U
FRONT
MEMORY IC
IC702
CRT EARTH
(BRAIDED ASS'Y)
T
IC201
S
SPEAKER
TP-E(GND)
R927
TP-91(B1)
IC851
T111
CW
DOWNUP
S401
V CENTER SW
TUNER
C
HV
IC421
1: X-RAY
2: GND
3: X-RAY
T521
HVT
X
U
3
1
UPPER : FOCUS
LOWER : SCREEN
(No.YA245)1-11
Page 12
4.6BASIC OPERATION OF SERVICE MODE
MAIN MENU
SERVICE MENU
1.V/C(S) 2.DEF(D)
3.SOUND(A) 4.OTHERS(F)
5.3L Y/C(LYC)
7.LOW LIGHT 8.HIGH LIGHT
9.VCO
11.I2C BUS 12.SYSTEM(SYS)
SELECT BY
OPERATE BY EXIT BY
RF 4 : 3 STD LOW
S01 BRIGHT
RF 4 : 3 STD LOW
D01 V FREQ
EXIT
1.V/C(S)
2.DEF(D)
SUB MENU
7.LOW LIGHT
BRIGHT
8.HIGH LIGHT
9.VCO [Fixed value]
TOO HIGH GOOD TOO LOW
SYNC: YES
AFC ON
FINE 0
3.SOUND(A)
A01 IN LEVEL
4.OTHERS(F) [Fixed value]
F01
5.3L Y/C(LYC) [Fixed value]
LYC01
11.I2C BUS [Fixed value]
I2C BUS ON
12.SYSTEM(SYS) [Fixed value]
SYS01 VIDEO IN
1-12 (No.YA245)
Page 13
4.6.1 TOOL OF SERVICE MODE OPERATION
Operate the SERVICE MODE with the REMOTE CONTROL UNIT.
4.6.2 SERVICE MODE ITEMS
In general, basic setting (adjustments) items or verifications are performed in the SERVICE MODE.
1. V/C (S)This sets the setting values of the VIDEO circuit.
2. DEF (D)This sets the setting values of the DEFLECTION circuit.
3. SOUND (A)This sets the setting values of the AUDIO circuit.
4. OTHERS (F)This sets the setting values of the factory settings. [Do not adjust]
6. 3L Y/C(LYC) This sets the setting values of the 3 line YC separation control circuit. [Do not adjust]
7. LOW LIGHTThis sets the setting values of the WHITE BALANCE (LOW LIGHT) control circuit.
8. HIGH LIGHTThis sets the setting values of the WHITE BALANCE (HIGH LIGHT) control circuit.
9. VCOThis sets the setting values of the VCO control circuit. [Do not adjust]
2
11. I2C BUSThis sets the setting values of the I
C BUS control circuit. [Do not adjust]
12. SYSTEM(SYS) This sets the setting values of the system control circuit. [Do not adjust]
4.6.3 HOW TO ENTER THE SERVICE MODE
(1) Set to 0 minutes using the [SLEEP TIMER] key.
(2) Press the [VIDEO STATUS] key and [DISPLAY] key
SERVICE MODE SELECT KEY
simultaneously while “0 MIN” is displayed, then enter the
SERVICE MODE.
NOTE:
TV/CATV switch
Before entering the SERVICE MODE, confirm that the setting
of TV / CATV switch of the REMOTE CONTROL UNIT is at the
"TV" side and the setting of VCR / DVD switch is at the "VCR"
DISPLAY
side. If the switches have not been properly set, you cannot
enter the SERVICE MODE.
SLEEP TIMER
VCR/DVD switch
POWER
NUMBER
4.6.4 HOW TO STORE OF SETTING VALUE
The setting value will be stored automatically when release the
REMOTE CONTROL UNIT keys
4.6.5 HOW TO EXIT THE SERVICE MODE
Press the [EXIT] key to exit the SERVICE MODE.
VIDEO STATUS
VOL-
MENU
ASPECT
RM-C1258G
CH+
VOL+
EXIT
CH-
(No.YA245)1-13
Page 14
4.6.6 SERVICE MODE SETTING
A
1. V/C, 2. DEF
• Press [CH+] / [CH-] key
For scrolling up/down the adjustment item.
• Press [VOL+] / [VOL-] key
For scrolling up/down the data values.
NOTE:
The setting value will be stored automatically when release
the REMOTE CONTROL UNIT keys.
INPUT
SIGNAL
RF 4 : 3 STD LOW
SPECT
COLOR
TEMPERATURE
VIDEO
STATUS
7. LOW LIGHT
The settings for WHITE BALANCE(LOW LIGHT) control
circuit.
NOTE:
The setting value will be stored automatically when release
the REMOTE CONTROL UNIT keys.
HIGH: White balance high mode
LOW: White balance low mode
3. SOUND (A)
• Press [CH+] / [CH-] key
For scrolling up/down the adjustment item.
• Press [VOL+] / [VOL-] key
For scrolling up/down the data values.
NOTE:
The setting value will be stored automatically when release
the REMOTE CONTROL UNIT keys.
R CUTOFF
G CUTOFFB CUTOFF
SETTING VALUE
8. HIGH LIGHT
The settings for WHITE BALANCE(HIGH LIGHT) control
circuit.
NOTE:
The setting value will be stored automatically when release
the REMOTE CONTROL UNIT keys.
SETTING VALUE
B DRIVER DRIVE
1-14 (No.YA245)
A01 IN LEVEL
SETTING ITEM
SETTING NO.
SETTING VALUE
Page 15
4.7INITIAL SETTING VALUE OF SERVICE MODE
(1) Adjustment of the SERVICE MODE is made on the basis of the initial setting values ; however, the new setting values which set
the screen in its optimum condition may differ from the initial setting.
(2) Do not change the initial setting values of the setting items NOT LISTED IN ADJUSTMENT PROCEDURE.
(3) --- : This mark described in each table shows "Cannot adjust it."
4.7.1 [1.V/C(S)]
Initial setting value
No.
S01BRIGHT 0 - 12764------------
S02PICTURE 0 - 12765------------
S03COLOR 0 - 12748---------52
S04TINT 0 - 12760---------62
S05DETAIL0 - 6330------3540
S06BRIGHT+- -32 - +32---±0±0-3-2
S07PICT+- -32 - +32---±0±0-7±0
S08COLOR+- -32 - +32---±0-3-4---
S09TINT+- -32 - +32---±0-6±0---
S10DETAIL+- -32 - +32------+3------
Setting
item
Variable
range
STANDARDTHEATERSTANDARDSTANDARD
4 : 316 : 94 : 34 : 34 : 3
RF
EXTERNAL
S / COMPOSITE
(
EXTERNAL
)
(COMPONENT)
Initial setting value
No.
S11R CUT OFF 0 - 25530---------------------
S12G CUT OFF 0 - 25530---------------------
S13B CUT OFF 0 - 25530---------------------
S14R DRIVE 0 - 12764---------------------
S15B DRIVE 0 - 12764---------------------
S16R CUT +--128 - +127--- ±0 ±0 ±0 ±0---------
S17G CUT +--128 - +127--- ±0 ±0 ±0 ±0---------
S18B CUT +--128 - +127--- ±0 ±0 ±0 ±0---------
S19R DRV +--128 - +127---+5+13+7 ±0---------
S20B DRV +--128 - +127---+6-25-9 ±0---------
S21NTSC MAT0 - 333112211
S22BLACK ST0 - 31---1---------------
S23DC REST0 - 11---1---------------
S24DCRSW0 - 11---1---------------
No.
S25ASSY SHRP0 - 7444
S26BPF FO0 - 100---
S27KILR OFF0 - 100---
S28KILR SEN0 - 111---
Setting
item
Setting
item
Variable
range
Variable
range
RF / EXTERNAL (S / COMPOSITE)EXTERNAL (COMPONENT)
STANDARDTHEATERSTANDARDTHEATER
LOWHIGHLOWHIGHLOWHIGHLOWHIGH
Initial setting value
RF
EXTERNAL (S / COMPOSITE)
EXTERNAL (COMPONENT)
(No.YA245)1-15
Page 16
No.
S29RGB MUTE0 - 10
S30BLUE B0 - 11
S31VIDEO SW0 - 33
S32CMP ABCL0 - 10
S33OSD ABL0 - 10
S34OSD CONT 0 - 636
S35SUB CONT 0 - 158
S36ABL GAIN0 - 30
S37ABL PNT0 - 33
S38Y GAMMA0 - 31
S39Y MUTE0 - 10
S40SVM GAIN0 - 33
S41SVM PH0 - 33
S42WPL0 - 10
S43COL GMM0 - 10
S44V1 GAIN 0 - 7 4
S46VMOFF DE-128 - +127±0
S47APC CLK0 - 11
S48PIP ADJ 0 - 15 0
Setting
item
Variable
range
Initial setting value
1-16 (No.YA245)
Page 17
4.7.2 [2. DEF (D)]
No.
D01V FREQ0 - 3003
D02AFC GAIN0 - 3002
D03H POSI 0 - 3113---13
D04H POSI+--128 - +127---±0---
D05V PHASE0 - 70---0
D06V PH+--128 - +127---±0---
D07V SIZE 0 - 12755---55
D08V SIZE+--128 - +127----26---
D09V CENTER 0 - 6332---32
D10V CENT+--128 - +127---±0---
D11V S CORR 0 - 150---0
D12V S CO+--128 - +127---±0---
D13V LIN 0 - 154---4
D14V LIN+--128 - +127---±0---
D15H SIZE 0 - 6332---32
D16H SIZE+--128 - +127---±0---
D17WVMT TOP0 - 3020
D18WVMT BTM0 - 3020
D19EWCR TOP 0 - 3116---16
D20EWCR T+--128 - +127---±0---
D21EWCR BTM 0 - 3116---16
D22EWCR B+--128 - +127---±0---
D23EW PARA 0 - 6326---26
D24EW PARA+- -128 - +127---±0---
D25V EHT0 - 70---0
D26V EHT+--128 - +127---±0---
D27H EHT0 - 70---0
D28H EHT+--128 - +127---±0---
D29TRAPEZ 0 - 6334---34
D30TRAPEZ+--128 - +127---±0---
D31V AGC0 - 1000
D32BLANK SW0 - 1000
D33VRMP BI0 - 1000
Setting
item
Variable
range
4 : 316 : 94 : 3
Initial setting value
RFEXTERNAL
(No.YA245)1-17
Page 18
4.7.3 [3. SOUND(A)]
No.
A01IN LEVEL 0 - 1512
A02LOW SEP 0 - 6339
A03HI SEP 0 - 63 16
A04SAPC 0 - 10
A05BBE BASS-128 - +127±0
A06BBE TRE-128 - +127±0
A07AHS MVE-128 - +127±0
A08AHS MSC-128 - +127±0
4.7.4 [4. OTHERS(F)] [Do Not adjust : All fixed]
No.
F01OSD POSI 0 - 25531
F02OSD FREQ 0 - 25585
F03CCD POSI 0 - 25547
F04CCD FREQ 0 - 25594
F05CCD CONT 0 - 639
F06PUR WBCK 0 - 10
F07PUR CONT 0 - 6362
F08CCD PCHK 0 - 11
F09VMOFF0 - 10
F10VNR CHK 0 - 2553
F11VCSN TM 0 - 2555
F12VM DAT A-128 - +127+8
F13VM DAT B-128 - +127-4
F14VM DAT C-128 - +127-10
F15VM DAT D-128 - +127-16
F16VM DAT E 0 - 11
F17XDSID TM 0 - 25515
F18FM TRAP 0 - 10
Setting
item
Setting
item
Variable
range
Variable
range
Initial setting value
Initial setting value
4.7.5 [5. 3L Y/C(LYC)] [Do not adjust : All fixed]
No.
LYC01 MODE 0 - 74
LYC02 VENH 0 - 71
LYC03 PDSOFF 0 - 10
LYC04 CB 0 - 10
LYC05 VNLR 0 - 152
LYC06 GSEL0 0 - 10
LYC07 GSEL1 0 - 11
LYC08 COR 0 - 30
LYC09 TRAP 0 - 11
LYC10 CHTRAP 0 - 10
LYC11 CBPF 0 - 10
LYC12 ENHOFF 0 - 10
4.7.6 [12. SYSTEM(SYS)] [Do not adjust : All fixed]
No.
SYS01 VIDEO IN 0 - 43
SYS02 VSM 0 - 10
SYS03 CLR TEMP 0 - 11
SYS04 THEATER 0 - 11
SYS05 THEA PRO 0 - 11
SYS06 GAME MD 0 - 10
SYS07 AHS 0 - 10
SYS08 HYPER SR 0 - 11
SYS09 BBE 0 - 10
SYS10 S SOUND 0 - 11
SYS11 16:9 MD 0 - 31
SYS12 S CCD 0 - 11
SYS13 ID DISP 0 - 11
SYS14 CH LAB 0 - 11
SYS15 V LAB 0 - 11
SYS16 W CLOCK 0 - 11
SYS17 PIM 0 - 11
SYS18 PURITY 0 - 10
SYS19 VOL MUTE 0 - 10
SYS20 VCHIP 0 - 11
SYS21 VCHIP CA 0 - 11
SYS22 CCD 0 - 11
SYS23 HYPSCAN 0 - 11
SYS24 JVC LOGO 0 - 11
SYS25
SYS26
Setting
item
Setting
item
PANORAMA
TILT
Variable
range
Variable
range
0 - 10
0 - 10
Initial setting value
Initial setting value
1-18 (No.YA245)
Page 19
4.8ADJUSTMENT PROCEDURE
4.8.1 CHECK ITEM
Item
Measuring
instrument
Test pointAdjustment partDescription
B1 VOLTAGEDC voltmeter TP-91B(R927)
TP-E (IC421
Heatsink)
[MAIN PWB]
HIGH VOLTAGE
HOLD DOWN
Resistor
(18.0kΩ, ±1%)
X connector
1-pin
3-pin
[MAIN PWB]
RESISTOR
18.0 k 1%
X CONNECTOR321
HEATER
T521
4
(1) Receive the black and white signal. (color off)
(2) Connect the DC voltmeter to the TP-E and TP-91B.
(3) Confirm that the voltage is DC134V(-1.5 / +2V).
• After reparing the high voltage hold down circuit. This
circuit shall be checked to operate correctly.
(1) Turn the power switch to on.
(2) Refer to the figure, connect the resistor between X
connector 1-pin and 3-pin.
(3) Make sure that the screen picture disappeares.
(4) Disconnect the power plug.
(5) Remove the resistor.
(6) Again connect the power plug.
(7) Turn the power switch to on.
(8) Make sure that the normal picture is displayed on the
screen.
4.8.2 FOCUS
Item
Measuring
instrument
FOCUSSignal
generator
4.8.3 DEFLECTION CIRCUIT
Item
V. SIZE /
V. POSITION
Measuring
instrument
Signal
generator
(4:3)
Remote
control unit
Screen
size
Test pointAdjustment partDescription
FOCUS VR
[In HVT]
(1) Receive the crosshatch signal.
(2) While watching at the screen, adjust the FOCUS VR
to the vertical and horizontal lines will be thinnest
and sharpest center horizontal line.
(3) Make sure that the picture is in focus even when the
screen gets darkened.
Test pointAdjustment partDescription
[2.DEF (D)]
D05: V PHASE
D07: V SIZE
D13:V LIN
D11:VS CORR
(1) Receive the crosshatch signal.
(2) Select 2.DEF(D) from the SERVICE MODE.
(3) Select < D05 > (V PHASE).
(4) Set the initial setting of < D05 >.
(5) Adjust V. CENTER SW to agree the vertical center
with display center.
(6) Select < D07 > (V SIZE).
(7) Adjust < D07 > to the vertical screen size become
setting value is 92%.
NOTE:
• Bottom is to be located within the 85%-95% range.
Picture
size
100%
V. CENTER SW
)
(S401
[MAIN PWB]
• When vertical linearity is not even, adjust < D13 > (V
LIN) and < D11 > (VS CORR) to vertical linearity
(No.YA245)1-19
Page 20
Item
V. SIZE /
V. POSITION
(16:9)
B
[B=B']
B'
Measuring
instrument
Signal
generator
Remote
control unit
Test pointAdjustment partDescription
[2.DEF (D)]
D08: V. SIZE+D14: V. LIN+-
• V. SIZE / V. POSITION (4:3) adjustment should be
finished.
(1) Receive a black and white signal (color off).
(2) Select 16:9 mode.
(3) Confirm that the width of V. BLANKING is equal to
adjustment value (B).
(4) If the value (B) is not correct, select 2.DEF(D) from
• When you change the VERTICAL adjustment value of
the regular mode (4:3), review the adjustment of 16:9
mode again.
Adjust point
B
H. SIZE /
H. POSITION /
SIDE PIN
(4:3)
H. POSITION /
H. SIZE /
SIDE PIN
(16:9)
Setting value
67 mm
Signal
generator
Remote
control unit
Screen size
Picture size 100%
Signal
generator
Remote
control unit
Screen size
Picture size 100%
[2.DEF (D)]
D03: H POSI
D15: H SIZE
D23: EW PARA
D19: EWCR TOP
D21: EWCR BTM
[2.DEF (D)]
D16: H SIZE+D04: H POSI+D24: EW PARA+D20: EWCR T+D22: EWCR B+-
(1) Receive the crosshatch signal.
(2) Select 2.DEF(D) from the SERVICE MODE.
(3) Select < D03 > (H POSI).
(4) Adjust < D03 > to the left width and right width of the
crosshatch screen becomes equal.
(5) Select < D15 > (H SIZE).
(6) Adjust < D15 > to the horizontal screen size become
setting value is 90%.
(7) Select < D23 > (EW PARA).
(8) Adjust < D23 > to vertical line at both side to become
straight.
(9) If it is necessary, readjust step 3 to 8.
NOTE:
If it is not straight at the vertical upper and bottom corner
line, adjust the upper and bottom conrner pin by < D19 >
(EWCR TOP) amd < D21 > (EWCR BTM).
• V. SIZE / V. POSITION adjustment should be finished.
• H. SIZE / H. POSITION / SIDE PIN adjustment should
be finished. (Regular size(4:3)).
(1) Receive the crosshatch signal.
(2) Select 16:9 mode.
(3) Select 2.DEF(D) from the SERVICE MODE.
(4) Confirm both sides of crosshatch to be the
adjustment value 90%.
(5) If the value is not correct, adjust < D16 > (H SIZE+-)
and < D04 > (H POSI+-) to the horizontal screen size
become setting value is 90%.
(6) Confirm the second vertical line from left to right to
be straight.
(7) If it is not straight, adjust to be straight by < D24 >
• Review the adjustment of 16:9 mode again when you
change the SIDE PIN adjustment value of regular
(4:3) mode.
1-20 (No.YA245)
Page 21
4.8.4 VIDEO CIRCUIT
Item
WHITE
BALANCE
Measuring
instrument
Signal
generator
(LOW LIGHT)
Remote
control unit
REMOTE CONTROL UNIT
H.LINE ON
R CUTOFFB CUTOFF
R CUTOFFB CUTOFF
H.LINE OFFEXIT
G CUTOFF
G CUTOFF
Test pointAdjustment partDescription
[1.V/C (S)]
S01: BRIGHT
S11: R CUTOFF
S12: G CUTOFF
S13: B CUTOFF
(1) Receive the black and white signal ( color off ).
(2) Select the 1.V/C (S) from the SERVICE MODE.
(3) Confirm the initial setting value of < S11 > (R
(6) Display a single horizontal line by pressing the [1]
SCREEN VR
[in HVT]
key.
(7) Turn the SCREEN VR all the way to the left.
(8) Turn the SCREEN VR gradually to the right from the
left until either one of the red, blue or green colors
appears faintly.
(9) Adjust the two colors which did not appear until the
single horizontal line that is displayed becomes
white using the [4] to [9] keys.
(10) Turn the SCREEN VR until the single horizontal line
is displayed faintly.
(11) Press the [2] key to cancel the single horizontal line
mode.
(12) Return to the main menu in SERVICE MODE.
(13) Select the 1.V/C (S) from the SERVICE MODE.
(14) Adjust the BRIGHT level to become the black
component shines white slightly by < S01 >.
(15) Confirm that whether the color ingredient of R, G, or
B is visible to the black component, which shines
white slightly.
(16) When the color ingredient can be seen, two colors
other than a visible color are adjusted, and it is made
to look white.
(17) Return the value of < S01 > to initial setting value.
WHITE
BALANCE
Signal
generator
(HIGH LIGHT)
Remote
control unit
REMOTE CONTROL UNIT
R DRIVE
R DRIVE
SUB BRIGHTRemote
control unit
EXIT
B DRIVE
B DRIVE
[1.V/C (S)]
S14: R DRIVE
S15: B DRIVE
[8.HIGH LIHGT]
[1.V/C (S)]
S01: BRIGHT
•The [3] (EXIT) key is the cancel key for the WHITE
BALANCE.
(1) Receive the black and white signal (color off).
(2) Select the 1.V/C (S) from the SERVICE MODE.
(3) Set the initial setting value of < S14 > (R DRIVE) and
< S15 > (B DRIVE).
(4) Return to the main menu in SERVICE MODE.
(5) Select the 8.HIGH LIGHT from the SERVICE
MODE.
(6) Adjust the screen until it becomes white using the
[4], [6], [7] and [9] keys.
•The [3] (EXIT) key is the cancel key for the WHITE
BALANCE.
(1) Receive any broadcast.
(2) Select the 1.V/C (S) from the SERVICE MODE.
(3) Select < S01 > (BRIGHT).
(4) Set the initial setting value of < S01 >.
(5) If the brightness is not the best with the initial setting
value, make fine adjustment of < S01 > until you get
the optimum brightness.
(No.YA245)1-21
Page 22
Item
SUB
CONTRAST
Remote
control unit
4.8.5 MTS CIRCUIT
Item
MTS INPUT
LEVEL
MTS
SEPARATION
Remote
control unit
TV audio
multiplex
signal
generator
Oscilloscope
L-Channel
signal waveform
1 cycle
Measuring
instrument
Measuring
instrument
Test pointAdjustment partDescription
[1.V/C (S)]
S02: PICTURE
(1) Receive any broadcast.
(2) Select the 1.V/C (S) from the SERVICE MODE.
(3) Select < S02 > (PICTURE).
(4) Set the initial setting value of < S02 >.
(5) If the contrast is not the best with the initial setting
value, make fine adjustment of the < S02 > until you
get the optimum contrast.
Test pointAdjustment partDescription
[3.SOUND (A)]
A01: IN LEVEL
(1) Receive any broadcast.
(2) Select the 3.SOUND (A) from the SERVICE MODE.
(3) Select the < A01 > (IN LEVEL).
(4) Set the initial setting value of < A01 >.
R OUT
L OUT
[AUDIO OUT]
[3.SOUND (A)]
A02: LOW SEP.
A03: HI SEP.
(1) Input the stereo L signal (300 Hz) from the TV audio
multiplex signal generator to the antenna terminal.
(2) Connect an oscilloscope to R OUT pin of the AUDIO
OUT, and display one cycle portion of the 300 Hz
signal.
(3) Select the 3.SOUND (A) from the SERVICE MODE.
(4) Select the < A02 > (LOW SEP.).
(5) Set the initial setting value of < A02 >.
R-Channel
crosstalk portion
Minimum
(6) Adjust the < A02 > so that the stroke element of the
300Hz signal will become minimum.
(7) Change the connection of the oscilloscope to L OUT
pin of the AUDIO OUT, and enlarge the voltage axis.
(8) Change the signal to 3 kHz, and similarly adjust
< A03 > (HI SEP.).
1-22 (No.YA245)
Page 23
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
(No.YA245)1-23
Page 24
Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan
(No.YA245)
Printed in Japan
VPT
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