[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)
(H: 55.4 cm × V: 41.8 cm)
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 connector × 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
AV-27F476AV-32F476
Contents
93.9 cm × 68.5 cm × 57cm
(37" × 27" × 22-1/2")
80 cm (34") Measured diagonally
(H: 65.6 cm × V : 49.6 cm)
Design & specifications are subject to change without notice.
1-2 (No.YA243)
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.YA243)1-3
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.
FLAT SQUARE CRT
It became legible from any position by CRT with few reflection
and reflect lumps on the flat screen.
DIGITAL COMB FILTER
By the 3 line digital comb filter, the refreshed image can be
seen.
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.
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.
BBE
High definition audio adds natural, clear and extraordinary
sound quality to any program.
HYPER SURROUND
Creates a deep, three-dimensional sound effect by channeling
the audio through the TV's front-firing speakers.
How to recognize from the appearance of the model concerned is written below. Please distinguish from several contents currently
printed on the rating label
MODEL NAME
AV-27F476
AC 120V 60Hz
MODEL NO.
TV SCREEN SIZE : DIAGONAL
CHASSIS NO.
MANUFACTURED
SERIAL NO.
W
INCHES
ME
VIDEO EQUIPMENT
4C43
AV-32F476
DISTINGUISH NAME
RA
SA
YA
ZA
1-4 (No.YA243)
2.4TECHNICAL INFORMATION
2.4.1 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_DVD DI 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 separation output)56 ASP_ABLI Not used
Pin
Pin nameI/OFunction
No.
MONITOR_OUT
O Not used
(No.YA243)1-5
SECTION 3
DISASSEMBLY
3.1DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER
(1) Disconnect the power plug.
(2) Remove the 11 screws [A].
(3) Withdraw the REAR COVER backward.
3.1.2 REMOVING THE AV TERMINAL BOARD
• Remove the REAR COVER.
(1) Remove the 4 screws [B].
(2) Withdraw the AV TERMINAL BOARD toward you.
3.1.3 REMOVING THE CHASSIS
• Remove the REAR COVER.
• Remove the AV TERMINAL BOARD.
(1) Slightly raise the both sides of CHASSIS by hand.
(2) Remove the 2 claws under the both side of the CHASSIS
from the front cabinet.
(3) Withdraw the CHASSIS backward.
(If necessary, remove the wire clamp, connectors etc.)
3.1.7 CHECKING THE CHASSIS
To check the PW Board from back side.
(1) Pull out the CHASSIS (refer to REMOVING THE CHASSIS).
(2) Erect the CHASSIS vertically with the HVT side facing up
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 PWB.
3.1.8 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.
3.1.4 REMOVING THE SPEAKER
• Remove the REAR COVER.
(1) Remove the 2 screws [C], then remove the SPEAKER with
SPEAKER HOLDER.
(2) Remove the 2 screws [D], then remove the SPEAKER
from the SPEAKER HOLDER.
(3) Follow the same steps when removing the other hand
SPEAKER.
NOTE :
When remove the 2 screws [C] of the SPEAKER, remove the
lower side screw first, and then remove the upper one.
3.1.5 REMOVING THE LED & POWER SW PWB
• Remove the REAR COVER.
(1) Remove the 2 screws [E].
(2) Withdraw the LED & POWER SW PWB toward you.
*If necessary, remove the wire clamp, connector etc.
3.1.6 REMOVING THE FRONT CONTROL PWB
• Remove the REAR COVER.
(1) Remove the 2 screws [F].
(2) Withdraw the FRONT CONTROL PWB toward you.
*If necessary, remove the wire clamp, connector etc.
1-6 (No.YA243)
FRONT CABINET
LED & POWER SW PWB
D
C
SPEAKER
CRT SOCKET PWB
SPEAKER HOLDER
FRONT CONTROL PWB
MAIN PWB
Claw
F
E
REAR COVER
Claw
AV SELECTOR PWB
POWER CORD
AV TERMINAL
BOARD
B
Fig.1
A
(No.YA243)1-7
3.1.9 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. 2).
(2) While keeping the surface of CRT down, mount the TV set
on the CRT change table balanced will as shown in Fig. 2.
(3) Remove 4 screws marked by arrows with a box type screw-
driver as shown in Fig. 3.
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. 4.
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.
CRT CHANGE TABLE
CLOTH
CRT
CHANGE
TABLE
Fig.2
CRT
Fig.3
APPROX.
35cm
BOX
TYPE
SCREW
DRIVER
CRT
CABINET
CRT
CHANGE TABLE
Fig.4
COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION.
Subsequent to replacement of the CRT and HV transformer or repair of the anode cap, etc. by dismounting them, be sure to coat
silicon grease for electrical insulation as shown in Fig.5.Wipe around the anode button with clean and dry cloth. (Fig.5)Coat silicon
grease on the section around the anode button. At this time, take care so that any silicon greases dose not sticks to the anode
button. (Fig.6)
Silicon grease product No. KS - 650N
CRT
Anode button
Approx.
20mm (Do not
coat grease on
this section
Silicon grease
should be coated
by 5mm or more
from the outside
diameter of anode
cap.
1-8 (No.YA243)
Silicon grease
coating
Fig.5
Anode button
(No sticking of
silicon grease)
Fig.6
Coating position
of silicon grease
Anode cap
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.YA243)1-9
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
Setting itemSetting position
TINT0
COLOR0
PICTURE+8
BRIGHT0
DETAIL+8
COLOR TEMPERATUREHIGH
NOISE MUTINGON
VSMON
(2) SOUND ADJUST
Setting itemSetting position
BASS0
TREBLE0
BALANCE0
MTSSTEREO
SMART SOUNDOFF
INPUTTV
CHANNELCH-02
VOLUME10
MUTINGOFF
DISPLAYOFF
SLEEP TIMEROFF
THEATER PROOFF
VIDEO STATUSDYNAMIC
ASPECT4 : 3
SOUND
(3) CLOCK / TIMERS
SET CLOCKOFF
ON / OFF TIMEROFF
(4) INITIAL SETUP
LANGUAGEENG.
CLOSED CAPTION OFF(CC1/T1)
FRONT PANEL LOCKOFF
AUTO SHUT OFFOFF
XDS ID ON
V-CHIPOFF
Setting itemSetting position
HYPER SURROND OFF
BBEON
Setting itemSetting position
Setting itemSetting position
1-10 (No.YA243)
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.YA243)1-11
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
VSMOFF
SOUND adjustmentAll 00
BBEOFF
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
1-12 (No.YA243)
4.5ADJUSTMENT LOCATIONS
HVT
V C ENT ER SW
FRONT
FRONT
LED & POWER SW PWB
POWER LED
POWER SW
SPEAKER
CN5006
B
SS
MEMORY IC
IC702
CN007
IC201
FRONT CONTROL PWB
B
CN004
CN6007
PW
POWER CORD
F901
5A
CN6006
FRONT
MAIN PWB
DEG
DEG COIL
CN001
AV SELECTOR
PWB
CRT SOCKET PWB
TOP
CN3004
TP-E
TP-R
(SOLDER SIDE)
TP-B
CN3005
TUNER
V CENTER SW
S421
DOWN
UP
5
1 : TP-E
2 : X-RAY2
3 : X-RAY1
4 : NC
5 : TP-91
DEF. YOKE
HV
HVT
E1
S1
CN005
1
( )
CRT EARTH
(BRAIDED ASS'Y)
UPPER : FOCUS
: SCREEN
LOWER
(No.YA243)1-13
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
1-14 (No.YA243)
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.YA243)1-15
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
1-16 (No.YA243)
A01 IN LEVEL
SETTING ITEM
SETTING NO.
SETTING VALUE
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."
(1) Receive the black and white signal. (color off)
(2) Connect the DC voltmeter to the 1-pin and 5-pin of
S1 connector.
(3) Confirm that the voltage is DC134.5V±2V.
• After repairing 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 S1
connector 2-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
4
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
D11: VS CORR
D13: V LIN
(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
)
(S1421
[MAIN PWB]
• When vertical linearity is not even, adjust < D13 > (V
LIN) and < D11 > (VS CORR) to vertical linearity
(No.YA243)1-23
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
50mm
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.
1-24 (No.YA243)
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.YA243)1-25
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
Remote
control unit
L-Channel
signal waveform
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 >.
(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
R-Channel
crosstalk portion
Minimum
pin of the AUDIO OUT, and enlarge the voltage axis.
(8) Change the signal to 3 kHz, and similarly adjust
< A03 > (HI SEP.).
1 cycle
1-26 (No.YA243)
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
(No.YA243)1-27
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.YA243)
Printed in Japan
VPT
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.