(37" × 27" × 22-1/2")
Mass67.0 kg (147.4 lbs)89.0 kg (195.8 Ibs)
TV RF SystemCCIR (M)
Color System NTSC
Sound System BTSC (Multi Channel Sound)
TV Receiving Channels
and Frequency
TV / CATV Total Channel180 Channels
Intermediate FrequencyVideo IF
Color Sub Carrier3.58 MHz
Power InputAC120V , 60Hz
Power Consumption215W (Max)
Picture Tube (Visible size)80cm (32") (Diagonally)
High Voltage32kV+1kV/-1.3kV (at zero beam current)
Speaker6.5cm × 13cm (2-1/2" × 5"), Oval type × 2
Audio Power Output10W × 10W
Antenna terminal (VHF/UHF)F-type connector, 75Ω unbalanced, coaxial
Video / Audio inputS-Video
Component Video
Digital-inVideo
Audio output
Subwoofer outputMore than 0 to 1000mV (rms) (+2.2dBs),
Speaker input16Ω, 20W (rms)
AV compulink III3.5mm mini jack × 1
Remote Control UnitRM-C1201G (AA/R6/UM-3 battery × 2)
Design & specifications are subject to change without notice.
(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 cir cuitry of the pr oducts shou ld n ot 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 me chanical 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 w hich 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 part s 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 L IVE : ( ) 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 measu re 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 fo r 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
METAL PART
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.
The D.I.S.T. is the function to change a input visual signal into
the high definition 1080 interlace signal
Multi screen function
• Picture in Picture
Back programs can be seen at once.
• Contents index.
A favorable program can be selected from the 9 preview PIPs
on the screen.
Provided with 2 tuners and 2 aspect (16:9 & 4:3) mode.
Multifunctional remote control permits picture adjustment.
The CH.GUARD function prevents the specific channels from
being selected, unless the "ID number" is entered.
I2C bus control utilizes single chip ICs.
Adoption of the VIDEO STATUS function.
• The VIDEO STATUS key gives you a choice of 4 picture
display settings, including a display of your own preferences.
STANDARD DYNAMIC THEATER GAME
Digital-in
To receive digital broadcasts.
Digital-in will display when any picture signal (480i/ 480p,
720p/ 1080i) in Digital-in is displayed.
Natural Cinema
Watching the movie or animation, press the Natural Cinema to
adjust the out line of the images to make thin more sharp.
Built-in V-CHIP system.
• This TV is equipped with V-CHIP technology which enables TV
parental guidelines and movie guideline controls.
Closed-caption broadcasts can be viewed.
Built-in MTS (Multi-channel Television Sound) system.
In addition to mono or stereo sound, an MTS broadcast may
also include a Second Audio Program (SAP).
Built-in A.H.S system & BBE sound system.
S-VIDEO input terminal for taking best advantage of Super
VHS.
3D Digital comb filter improves picture quality.
Plug-in menu
The plug-in menu comes up automatically when you first turn
on the TV after plugging it in.
2.2DIGITAL-IN TERMINAL FUNCTIONS
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
Pin name
RX2-
RX2+
GND2/ 4
RX4-
RX4+
SCL
SDA
NC
RX1-
RX1+
GND1/3
RX3-
Pin No.
14
15
16
17
18
19
20
21
22
23
24
Pin name
5V
GND
HTPLG
RX0-
RX0+
GND0/5
RX5-
RX5+
GNDC
TXC+
TXC-
PIN ASSIGNMENTPIN NAME
9
17
18
19
20
10
1
2
11
3
12
4
13
21
22
23
24
5
6
14
7
8
15
16
13
1-4 (No.52156)
RX3+
Page 5
2.3HOW TO IDENTIFY MODELS
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-32DF74
or AV-36DF74
AC 120V 60Hz
TV SCREEN SIZE : DIAGONAL
CHASSIS NO.
MANUFACTURED
SERIAL NO.
W
INCHES
ME
VIDEO EQUIPMENT
4C43
DISTINGUISH NAME
YA
2.4MAIN DIFFERENCE LIST
ItemAV-32DF74AV-36DF74
MODEL NO.
CRT (Picture tube) size
Dimensions (W × H × D)
32V(Diagonally)
(H: 65.6cm × W: 49.6cm)
93.9cm × 68.5cm × 57.0cm
(37” × 27” × 2-1/2”)
Mass (kg/lbs)67.0 kg (147.4 Ibs)89.0 kg (195.8 Ibs)
MAIN PWB ASS’YSSB-1074A-M2SSB-1075A-M2
DEF & POWER PWB ASS’YSSB-2074A-M2SSB-2075A-M2
MI-COM & DIST MODULE PWB ASS’YSSB0D074A-M2SSB0D075A-M2
CRT SOCKET PWB ASS’YSSB-3074A-M2SSB-3075A-M2
LINE FILTER PWB ASS’YSSB-9074A-M2SSB-9075A-M2
DEF OSC PWB ASS’YSSB0H074A-M2SSB0H075A-M2
FRONT CONTROL PWB ASS’YSSB0L074A-M2SSB0L075A-M2
DIGITAL INPUT MODULE PWB ASS’YSSB-7974A-M2SSB-7975A-M2
Purity adjustment functionNon functionOn display
INPUT-4 terminals(S-Video,Video,Audio L/MONO /R)
MENU button
OPERATE button (for MENU)
CHANNEL -/+ buttons
VOLUME -/+ buttons
Sensor (for remote control unit)
POWER & ON TIMER lamp
POWER(Main) button
8
4
INPUT- 4
OVER
VIDEO
S-VIDEOL / MONO - AUDIO - R
z AV TERMINAL (REAR)
SPEAKER INPUT
16 20W RMS
1
2
SUBWOOFER
OUT
3
4
5
6
MENU
OPERATE
321
11
VOLUMECHANNEL
Antenna (VHF/UHF) terminal
ON TIMER
POWER
8765
AUDIO OUT (L/R) terminal
SUBWOOFER OUT terminal
R
AUDIO
L
VIDEO
DIGITAL-IN
L
INPUT-1INPUT-2
Y
Y
Pb
Pb
Pr
Pr
INPUT-3 terminal (S-Video / Video /Audio L/R)
INPUT-2 terminal (Video/Audio L/R)
INPUT-1 terminal (S-Video / Video /Audio L/R)
AV COMPULINK jack
8
COMPONENT VIDEO INPUT-2 terminal (Y/Pb/Pr)
COMPONENT VIDEO INPUT-1 terminal (Y/Pb/Pr)
DIGITAL-IN terminal
[VIDEO IN (DVI 24pin), AUDIO L/R IN]
SPEAKER INPUT terminal
1-8 (No.52156)
78910
Page 9
z REMOTE CONTROL (RM-C1201G)
1234
10
11
13
TV CATV VCR
5
6
7
8
9
MULTI SCREEN
FREEZE
INPUT1
INPUT2
INPUT3
INPUT4
DIGITAL-IN
SLEEP TIMER
MUTINGC.C.
VOL
12
VCR CHANNEL
PREV NEXTPOWER
REW
REC
OPEN/CLOSESTILL/PAUSE
DVD
ASPECT
INDEX
SELECT
SWAP
123
456
7809
THEATER
NATURAL
PRO
CINEMA
DISPLAY SOUND
CH
VOL
OK
CH
VCR / DVD
PLAYFF
STOP PAUSE
RM-C1201G
TV
POWER
EZ SURF
PIP/MOVE
RETURN
VIDEO
STATUS
LIGHT
BACKMENU
TV/VCR
/TV
15
17
19
21
23
14
16
18
20
22
1
TV / CATV switch
2
VCR / DVD switch
ASPECT key:
3
4
POWER key
MULTI SCREEN keys:
5
4:3 16:9 V STRETCH
(INDEX, EZ SURF, FREEZ, SWAP, SELECT, PIP/MOVE keys)
INDEX key: 9 screen mode
EZ SURF key:
PIP/MOVE key: PIP screen can be bispalyed.
Input select keys:
6
Back program can be displayed.
can be displayed.
(INPUT1, INPUT2, INPUT3, INPUT4, DIGITAL-IN)
7
THEATER PRO key
8
SLEEP TIMER key:
DISPLAY key
9
10
MUTING key (memory key
11
VOL+/- & VOL /
12
MENU key
13
VCR / DVD
14
channel number keys
15
100+ key
16
RETURN+/TV key
17
NATURAL CINEMA
VIDEO STATUS key:
18
19
LIGHT key
20
SOUND key:
C.C. (CLOSED CAPTION) key:
21
CH+/- & CH /
22
23
BACK key
NOTE
CONTROL
The CH+/- keys and VOL+/- keys operate CHANNEL and
0 15 30 165 180
for SERVICE MENU
(for SERVICE MENU)
keys
keys
AOUT ON OFF
key:
STANDARD DYNAMIC THEATER GAME
MOVIE MUSIC OFF
A.H.S: and BBE ON/OFF can be set
OFF CAPTION TEXT
(for SERVICE MENU)
keys
VOLUME normally.
These keys are also used to navigate SERVICE MENU as the
CH / and VOL / keys.
)
(No.52156)1-9
Page 10
SECTION 3
DISASSEMBLY
3.1DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER
• Unplug the power supply cord.
(1) Remove the 13 screws [A] as shown in Fig.2.
(2) Remove the REAR COVER toward you.
NOTE:
When reinstalling the REAR COVER, carefully push it inward
after inserting the chassis into the REAR COVER groo ve .
3.1.2 REMOVING THE AV TERMINAL BOARD
• Remove the REAR COVER.
(1) Remove the 6 screws [B] as shown in Fig.2.
(2) When you pull out the AV TERMINAL BOARD in the
direction of arrow [a] as shown in Fig.2, it can be removed.
3.1.3 REMOVING THE CHASSIS
• Remove the REAR COVER.
(1) Slightly raise the both sides of the CHASSIS by hand and
remove the 2 claws under the both sides of the CHASSIS
from the front cabinet.
(2) Draw the CHASSIS backward along the rail in the arrow
direction [a] as shown in Fig.2.
(If necessary, take off the wire clamps, connectors etc.)
NOTE:
When conducting a check with power supplied, be sure to
confirm that the CRT earth wire is connected to the CRT
SOCKET PWB and MAIN PWB or DEF & POWER PWB.
3.1.4 REMOVING THE CONTROL BASE
• Remove the REAR COVER.
Remove the CHASSIS.
(1) While pushing down the claws [b] as shown in Fig.1.
(2) Remove the CONTROL BASE in the arrow direction
marked [c].
( If necessary, take off the wire clamps, connectors etc. )
3.1.5 REMOVING THE SPEAKER / SPEAKER HOLDER
• Remove the REAR COVER.
(1) Remove the 2 screws [C] as shown in Fig.2, then remo ve
the SPEAKER HOLDER toward you.
(2) Remove the 2 screws [D] as shown in Fig.2.
(3) Draw the SPEAKER toward you.
(4) Follow the same steps when removing the other hand
SPEAKER.
3.1.6 REMOVING THE DIGITAL INPUT MODULE PWB
• Remove the REAR COVER
• Remove the AV TERMINAL BOARD.
(1) Remove the 2 screws [E] as shown in Fig.2.
(2) Remove the DIGITAL INPUT MODULE PWB in the arrow
direction [d].
NOTE:
If necessary, take off the wire clamps, connectors etc.
3.1.7 CHECKING THE PW BOARD
• To check the backside of the circuit board.
(1) Pull out the CHASSIS. (Refer to REMOVING THE
CHASSIS).
(2) Erect the CHASSIS vertically so that you can easily check
the backside of the PW Board.
CAUTION:
• When erecting the CHASSIS, be careful so that there will be
no contact with other PWB.
• Before turning the power on, make sure that the CRT earth
wire and other connectors are properly connected.
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.
AV-36DF74/YA
DIGITAL INPUT MODULE
POWER CORD
1-10 (No.52156)
32DF74CP-S
36DF74CP-S
TERMINAL BOARD
SSB-7874A-M2 AV-32DF74/YA
SSB-7875A-M2
CLAW
CHASSIS
BASE
CAUTION AT DISASSEMBLY
WJJ0247-001A
(short jumper)
1
3
5
SB
connector
wire
2
4
6
Prior to disassembly, unplug the power cord from the wall
outlet without fail. (Turn the power “off”.)
Short the SB connector (1) pin and (2) pin of the digital input
unit. (At the time of assembling)
Before the rear cover is inserted into the cabinet, release the
short-circuit between the SB connector (1) pin and (2) pin of
the digital input unit.
After releasing the short-circuit between the SB connectors,
do not turn the power on until the rear cover is inserted into
the cabinet.
Negligence in carrying out the above steps may cause the
inactivation of the TV.
c
b
CONTROL
BASE
Fig.1
Page 11
AV-32DF74AV-36DF74
FRONT CABINET
LINE FILTER
PWB
FRONT SW
PWB
CONTROL
BASE
Fig.1
CLAW
MAIN PWB
CRT
SOCKET
PWB
D
( x 2)
SPEAKER
HOLDER
FRONT CONTROL
PWB
MI-COM &
DIST MODULE
PWB
RECEIVER
PWB
SPEAKER
SPACER
DEF OSC
PWB
CLAW
C
( x 2)
a
FRONT CABINET
DEF & POWER
PWB
FBT
CHASSIS
E
( x 2)
CRT
SOCKET
PWB
DIGITAL INPUT
MODULE PWB
d
AV TERMINAL
BOARD
REAR COVER
Fig.2
B
( x 6)
POWER CORD
NOTE
This exploded view describes about the AV-32DF74.
You can use the exploded view for disassembling the
AV-36DF74 in the same step as for this one.
A
( x 13)
(No.52156)1-11
Page 12
3.1.9 REMOVING THE CRT (PICTURE TUBE)
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 clo th
(shown in Fig. 3).
(2) While keeping the surface of CRT down, mount the TV set
on the CRT change table balanced will as shown in Fig. 3.
(3) Remove 4 screws marked by arrows with a box type
screwdriver as shown in Fig. 4.
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 slow ly
on cloth (At this time, be carefully so as not to damage the
front
surface of the cabinet) shown in Fig. 5.
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.
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.6.Wipe around the anode button with clean and dry cloth.
(Fig.6)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.7)
CAUTION FOR DEGAUSSING WORKS
Whenever degaussing works are required due to distorted
images and colors caused by the replacement of the CRT
or other external magnetic forces, self-degaussing (internal
degaussing) should be carried out without fail instead of
degaussing the monitor from the outside.
Because of the characteristics of the CRT used in this
monitor , the distorted images and colors may worsen if
degaussing the monitor from the outside has been
performed.
Even if external degaussing works have been carried out,
self-degaussing should be performed by turning the power
on the monitor.
When you want to perform self-degaussing of the monitor
whose power is already turned on, turn of f the power and
wait for about 10 minutes before turning the power on the
monitor again for self-degaussing.
CRT CHANGE TABLE
CLOTH
Fig.3
CRT
CRT
CHANGE
TABLE
Fig.4
CABINET
CRT
CHANGE T ABLE
Fig.5
Silicon grease product No. KS - 650N
CRT
Anode button
Silicon grease
coating
Fig.6
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.
CRT
APPROX.
35cm
BOX
TYPE
SCREW
DRIVER
1-12 (No.52156)
Anode button
(No sticking of
silicon grease)
Fig.7
Coating position
of silicon grease
Anode cap
Page 13
3.2MEMORY IC REPLACEMENT
3.2.1 MEMORY IC
This model uses a memory IC.
This memory IC stores data for proper operation of the video and
deflection circuits.
When replacing the memory IC, be sure to use an IC containing
this (initial value) data.
3.2.2 MEMORY IC REPLACEMENT PROCEDURE
(1) Power off
Switch the power off and disconnect the power cord from
the wall outlet.
(2) Replace the memory IC
Initial value must be entered into the new IC.
(3) Power on
Connect the power cord to the wall outlet and switch the
power on.
(4) SERVICE MENU setting
Before entering the SERVICE MENU, confirm that the
setting of TV/CATV SW of the REMOTE CONTROL UNIT
is at the "TV" side and the setting of VCR/DVD SW of the
REMOTE CONTROL UNIT is at the "VCR" side. If the
switches have not been properly set, you cannot enter the
SERVICE MENU.
a) Press [SLEEP TIMER] key and while the indication of
SLEEP TIMER 0 MIN is being displayed, press
[DISPLAY] key and [VIDEO STATUS] key on the
remote control unit (Fig.2) simultaneously.
b) The SERVICE MENU screen as shown in Fig.1 is
displayed.
c) Verify what to set in th e SERVICE MENU, and set
whatever is necessary (Fig.1).
Refer to the SERVICE ADJUSTMENT for setting.
d) Press the [BACK] key twice to return normal screen.
(5) Receive channel setting
Refer to the OPERATING INSTRUCTIONS (USER'S
GUIDE) and set the receive channels (Channels Preset) as
described.
(6) User settings
Check the user setting items according to the steps
described in the after page.
Where these do not agree, refer to the OPERATING
INSTRUCTIONS (USER'S GUIDE) and set the items as
described.
AUDIO OUT
CENTER CH INPUT
DIGITAL-IN
NOISE MUTING
FRONT PANEL LOCK
V1 SMART INPUT
LANGUAGE
CLOSED CAPTION
AUTO SHUT OFF
XDS ID
TILT CORRECTION
V-CHIP
SET LOCK CODE
AUTO DEMO
Setting value
Setting value
ON
FIX
NO
SIZE 1
ON
OFF
OFF
ENG
OFF ( CC1 / T1 )
OFF
OFF
Center
OFF
(0000)
OFF
COLOR
TEMPERATURE
COLOR
TEMPERATURE
DIGI. NOISE
CLEAR
DIGI. NOISE
CLEAR
1-14 (No.52156)
Page 15
3.4REPLACEMENT OF CHIP COMPONENT
3.4.1 CAUTIONS
(1) Avoid heating for more than 3 seconds.
(2) Do not rub the electrodes and th e 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.
3.4.2 SOLDERING IRON
(1) Use a high insulation soldering iron with a thin pointed end of it.
(2) A 30w soldering iron is recommended for easil y removing parts.
3.4.3 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 al-
ternately 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 sol-
der. 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 sol-
der.
(3) First solder lead A as indicated in the figure.
(2) As shown in the figure, push the part with tweezers and al-
ternately 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.52156)1-15
Page 16
SECTION 4
ADJUSTMENT
4.1ADJUSTMENT PREPARATION
(1) You can make the n ecessar y ad justments fo r this u nit
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 settin g value, which are
not specified in the list for this adjustment.
(7) Presetting before adjustment.
Unless otherwise specified in the adjustment instructions,
preset the following functions wi t h th e re mote control unit:
(1) DC voltmeter (or digital voltmeter)
(2) Oscilloscope
(3) Frequency counter
(4) Signal generator (Pattern generator)
[NTSC (480i) / 480p / 720p / 1080i / DIGITAL]
(5) TV audio multiplex signal generator
(6) Remote control unit
4.3ADJUSTMENT ITEMS
Adjustment items
1:B1 POWER SUPPLY
2:FOCUS
3:HORIZONTAL FREQUENCY
4:DEFLECTION CIRCUIT
V. POSITION / V. SIZE / V. LINEARITY adjustment
H. WIDTH / H.POSITION / SIDE PIN / TRAPEZIUM
adjustment
5:VIDEO CIRCUIT
WHITE BALANCE (Low Light & High Light)
adjustment
SUB BRIGHT / SUB CONTRAST adjustment
SUB COLOR / SUB TINT / B-Y GAIN adjustment
6:MTS CIRCUIT
CAUTION
Never change the initial setting value any
adjustments except for those that are designated
in the adjustment procedures.
In case where you have made undesignated
adjustments by mistake, never press the MUTING
key on the remote control unit.
Whenever you had not pressed the MUTING key,
you would be able to recover the initial
switching the POWER SW (on/off) key.
1-16 (No.52156)
value by
Page 17
4.4ADJUSTMENT LOCATIONS / WIRING
4.4.1 MAIN PARTS (PWB) LOCATION
A
:
CRT SOCKET PWB
B
:
MAIN PWB
C
:
DEF & POWER PWB
D
:
LINE FILTER PWB
E
:
DEF OSC PWB
F
:
FRONT CONTROL PWB
G
:
FRONT SW PWB
H
:
DIGITAL INPUT MODULE PWB
I
:
MI-COM & DIST MODULE PWB
J
:
RECEIVER PWB
K
:
TUNER (SUB)
L
:
TUNER (MAIN)
A
M
:
FBT
F
JBIEC
GDLK
H
AV TERMINAL
BOARD
M
POWER
CORD
(No.52156)1-17
Page 18
4.4.2 ADJUSTMENT LOCATIO N / WIRING DIAGRAM
FRONT SW PWB
FRONT
FRONT CONTROL PWB
FRONT
SPEAKER
L/R
FRONT
POWER
SW
BF
LED IND.
SENSOR
MAIN PWB
Y
F
M
RECEIVER
PWB
CN1006
CN1004
Y
G
MAIN MI-CON
(CPU)
(+)(-)
VOL.CH.
G
H
CN1002
(+)(-)
CN1001
MENU
H
FRONT
R
CN2001
CN2002
R
VIDEO
L/MONO
B
J
CRT
SOCKET PWB
S-V
CRT
FUSE
PW
LINE FILTER
PWB
TOP
MAIN
TUNER
(TU0102)
SUB
TUNER
(TU1101)
MEMORY IC
IC703
M
S
CN1005
SR
DC
MI-COM &
DIST MODULE
PWB
J2101J2111J2121
CN000E
CN2008
CN2003CN1003
DEF OSC PWB
DEF & POWER
PWB
S1
Q
AU
DIGITAL INPUT
MODULE PWB
1-18 (No.52156)
Page 19
DIGITAL IN
terminal
AUDIO
IN
VIDEO
IN
FRONT
DIGITAL INPUT
MODULE PWB
DC
SR
TOP
CRT SOCKET PWB
AU
Q
TOP
SB
CONNECT
TP-R
E
TP-G
TP-B
CRT SOCKET
E2
AJ
(solder side)
VM
TP-E1
FRONT
CONTROL
PWB
MAIN PWB
MAIN PWB
LINE FILTER
PWB
H
CN2001
CN2002
CN2003
MI-COM &
DIST MODULE
PWB
B
J
CN2008
HV
DEF & POWER PWB
DEG
FRONT
DEG
CRT
DY
DEF OSC PWB
FBT
S1
Q
AU
5
1
1Pin : TP-E ()
2Pin : X-ray2
3Pin : X-ray1
S1
4Pin : NC
5Pin : TP-91B (B1)
A
UPPER : H FOCUS VR
CENTER : V FOCUS VR
LOWER : SCREEN VR
(No.52156)1-19
Page 20
4.5BASIC OPERATION OF SERVICE MENU
4.5.1 TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
4.5.2 SERVICE MENU ITEMS
In general, basic setting (adjustments) items or verifications are performed in the SERVICE MENU.
1.PICTURE / SOUNDThis sets the setting values of the VIDEO/ AUDIO and DEFLECTION circuits.
2.YC SEPThis is used when the YC separation circuit is adjusted. [Do not adjust]
3.WHITE BALANCEThis sets the setting values of the Low Light and High Light.
4.MEMORY SETUPThi s sets the setting values of the memory address. [Do not adjust]
5.RF AFCThis is used when the IF VCO is adjusted. [Do not adjust]
8.IPThis sets the setting value of the DIST pr oce ss circuit. [Do not adjust]
9.DSDThis sets the setting value of the DSD (Digital Super Detail) circuit. [Do not adjust]
0.HDMIThis sets the setting value of the Digital input circuit. [Do not adjust]
4.5.3 BASIC OPERATION OF SERVICE MENU
(1) How to enter the SERVICE MENU
Before entering the SERVICE MENU, confirm that the
SERVICE MENU
setting of TV/CATV SW of the REMOTE CONTROL UNIT
is at the "TV" side and the setting of VCR/DVD SW of the
REMOTE CONTROL UNIT is at the "VCR" side. If the
switches have not been properly set, you cannot enter the
SERVICE MENU.
a) Press the [SLEEP TIMER] key and set SLEEP
TIMER for 0 min.
b) Before disappear the display of SLEEP TIMER
1.PICTURE/SOUND 7.
2.YC SEP8.IP
3.WHITE BALANCE 9.DSD
4.MEMORY SETUP 0.HDMI
5.RF AFC
6.
settings, simultaneously press the [DISPLAY] key
and [VIDEO STATUS] key of the remote control unit.
c) The SERVICE MENU screen will be displayed as
shown Fig.1.
(2) SERVICE MENU screen selection
Press the [CHANNEL NUMBER] keys to select any of the
items (Fig.1).
KEY FUNCTION of SERVICE MENU
TV/CATV
switch
Fig.1
VCR/DVD
switch
(3) Enter any setting
• 1. PICTURE/ SOUND
a) Select 1.PICTURE/SOUND with the [CHANNEL
NUMBER] keys and press the [CH/] keys to
select the setting items. Then the screen will be
displayed as shown in figure in the sub sequent page.
b) Then the settings or verifications can be
performed.
• Others
a) In order to select any of 2.YC SEP, 3.WHITE
BALANCE, 4.MEMORY SETUP, 5.RF AFC, 8.IP,
9.DSD and 0.HDMI, press the [Channel number]
keys from SERVICE MENU. The each screen will
be displayed as shown in the figure in the sub
sequent page.
b) Then the settings or verifications can be
performed.
(4) Setting method
a) [CH/] keys
Select the SETTING ITEM.
b) [VOL/] keys
SLEEP TIMER
key
MEMORY key
(MUTING)
Set value
VOL / key
MENU key
TV CATV VCR
MULTI SCREEN
FREEZE
INPUT1
INPUT2
INPUT3
INPUT4
DIGITAL-IN
SLEEP TIMER
MUTINGC.C.
SWAP
THEATER
DISPLAY SOUND
VOL
POWER
DVD
ASPECT
EZ SURF
INDEX
PIP/MOVE
SELECT
123
456
7809
RETURN
NATURAL
CINEMA
CH
OK
CH
VCR / DVD
POWER
VIDEO
STATUS
LIGHT
VOL
BACKMENU
TV/VCR
PRO
/TV
CHANNEL
NUMBER keys
DISPLAY &
VIDEO
STATUS key
Select item
CH / key
BACK key
Adjust the setting value.
c) [MUTING] key
Stored (memorized) the setting value.
d) [BACK] key
Return to the previous screen.
(5) Releasing SERVICE MENU
a) After returning to the SERVICE MENU upon
completion of the setting work, press the [BACK] key
again.
NTSC : Composite video / S-video / RF signal
DVD: 480i (Component) signal input
ED: 480p signal input
HD: 1080i signal input
750p : 750p signal input
(2) ASPECT / MULTI-SCREEN
ASPECT
REGU : 4:3
FULL : 16:9
PANO : V. stre tch
MULTI-SCREEN
M12: INDEX
(3) VIDEO STATUS
ST: STANDARD
DA: DYNAMIC
TH: THEATER
GA: GAME
(4) WHITE BALANCE
L: LOW
H: HIGH
(5) SCAN MODE
FL: interlace
LI: progressive
KEY FUNCTION of SERVICE MENU
MEMORY
SYSTEM
PRESS MUTING key
(5)
SCAN MODE
(4)
WHITE BALANCE
(LOW / HIGH)
4.5.6 SERVICE MENU SETTING
1. PICTURE/SOUND
AUDIO, VIDEO, DEFLECTION data adjustment.
(1) SETTING ITEM No.
A: AUDIO
S: SIGNAL
D: DEFLECTION
F: FACTORY SETTING
• Press [CH/] key : Item No. is up/down
• Press [SLEEP TIMER] key : Skip change
(2) SETTING ITEM NAME
Describe setting item name
(3) SETTING VALUE
Set the setting value.
• Press [VOL/ ] key : Set the setting value.
• Press [MUTING] key : Memorize the data.
1.PICTURE/SOUND
NTSC REGU ST L FL MUTE
A01 IN LEVEL 001
SETTING ITEM No.
A01~A17 / S01~S99
D01~D32 / F01~F71
2. YC SEP
YC separation circuit setting
[ Do not adjust ]
F01㨯㨯㨯D01㨯㨯㨯S01㨯㨯㨯A01㨯㨯㨯
F01D01S01A01
SETTING
VALUE
SETTING
ITEM
R.CUT OFF
R.CUT OFF
G.CUT OFF
G.CUT OFF
(
(
H.LINE ON
H.LINE OFF
(
(
MEMORY key
(MUTING)
VOL / key
MENU key
1-22 (No.52156)
(
)
)
)
)
FREEZE
SWAP
INPUT1
123
INPUT2
456
INPUT3
7809
INPUT4
THEATER
DIGITAL-IN
SLEEP TIMER
MUTINGC.C.
NATURAL
PRO
CINEMA
DISPLAY SOUND
CH
VOL
OK
CH
VCR / DVD
POWER
VOL
RETURN
VIDEO
STATUS
LIGHT
BACKMENU
TV/VCR
/TV
R.DRIVE
R.DRIVE
B.DRIVE
B.DRIVE
B.CUT OFF
B.CUT OFF
CH / key
Releasing
SERVICE MENU
BACK key
)
)
(
(
)
)
(
(
)
)
(
2.YC SEP
NTSC REGU ST L FL MUTE
SETTING ITEM
YCM001~YCM185
YCS001~YCS114
SETTING VALUE
YCM001
Indicated S/N level status of input signal
Page 23
3. WHITE BALANCE
Adjustment of LOW LIGHT / HIGH LIGHT
(1) SELECT ITEM
• Press [CH+] / [CH-] key
(2) SETTING VALUE
BRIGHT
• Press [VOL+] / [VOL-]
DRIVECUTOFF
[2] key : DRIVE R is up[7] key: CUTOFF G is up
[4] key : DRIVE R is down[100] key : CUTOFF G is down
[3] key : DRIVE B is up[8] key: CUTOFF R is up
[6] key : DRIVE R is down[0] key: CUTOFF R is down
(1) Adjustment of the SERVICE MENU 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) 2.Do not change the initial setting value s of th e setting items NOT LISTED IN ADJUSTMENT PROCEDURE.
(3) 3.Marked "---" in following table, it is offset value.
(1) Receive the black and white signal (color off).
(2) Connect the DC voltmeter to the pin 5 (TP-91) and
pin 1(TP-E) of S1 connector.
(3) Confirm that the voltage is DC183V±2.5V.
Test pointAdjustment partDescription
H FOCUS VR
V FOCUS VR
[FBT]
(1) Receive the crosshatch signal.
(2) Select the 4:3 mode.
(3) While watching the screen, adjust the V FOCUS VR
(Fig.2) to make the horizontal lines as fine and sharp
as possible. (Fig.1)
(4) Then adjust the H FOCUS VR (Fig.2) to make the
vertical lines as fine and sharp as possible. (Fig.1)
(5) Make sure that when the screen is darkened, the
lines remain in good focus.
finest and sharpest
as possible
Fig.1
4.7.3 HORIZONTAL FREQUENCY
Item
Measuring
instrument
H. FREQUENCY Signal
generator
Remote
control unit
H
FOCUS
V
SCREEN
H FOCUS VR
V FOCUS VR
SCREEN
Fig.2
Horizontal
line
Vertical
line
Test pointAdjustment partDescription
[1.PICTURE/SOUND]
D15: H. FREQ.
D18: (Not display)
(DEF RST OUT)
(1) Receive any broadcast.
(2) Select the 4:3 mode.
(3) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(4) Preset the value from 0 to 1 for the < D18 > (DEF
RST OUT).
(5) While observing the screen, adjust the < D1 5 >(H.
FREQ.) so that an optimum horizontal
synchronization is obtained.
(6) Press [MUTING] key to memorize the set value.
(7) Select the REGULAR mode.
(8) Memorize the same value on REGULAR mode as
will.
(9) After adjustment, preset the value from 1 to 0 for the
< D18 >.
(10) Press the [MUTING] key to memorize the set value.
(No.52156)1-41
Page 42
4.7.4 DEFLECTION CIRCUIT
Item
V. POSITION/
V. SIZE/
Measuring
instrument
Signal
generator
V. LINEARITY
Remote
control unit
4 : 3 SCREEN
Screen
size
(A)
ASPECT
4 : 3 / 16:9
V.STRETCH
16 : 9 SCREEN
Test pointAdjustment partDescri pti on
[1.PICTURE/SOUND]
D01: V. SIZE
D05: V. LINE
D06: V. CENT
(1) Receive the crosshatch signal.
(2) Select the 4:3 mode.
(3) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(4) Adjust the < D06 > (V.CENT) so that the horizontal
line of the vertical center on the crosshatch screen is
agreement with the screen center. The screen
(B)
center (Fig.1) is positioned at both side of the screen
vertical center.
Picture
size
100%
(5) Adjust the < D01 > (V.SIZE) to (A) settin g value as
following table and figures.
(6) Conform the (V.SIZE) to square the correct.
(7) Adjust the linearity of the top (B) and bottom (B)
parts of the screen to correct (Fig.1).
(B)
Fig.1
Picture size
(A)
91.5%
80.0%
(8) Press the [MUTING] key to memorize the set value.
(9) Select the 16:9 mode.
(10) Adjust the setting value to which the offset value of
addendum is added.
(11) Confirms adjustment point of (a) (Fig.2) to bellow
table.
(12) Press the [MUTING] key to memorize the set value.
(13) If adjustment is different, readjust each settings.
(14) Press the [MUTING] key to memorize the set value.
(a)
NOTE:
• Do not adjust the (D04) < V.S-CORRECTION >.
• If it is different V. position after adj usting the V. LIN.,
adjust the V. position (D01, D05, D06) again.
• Memorize the value every time after finishing
adjustments on each mode with [MUTING] key.
(a)
Fig.2
ModelAV-32DF74 AV-36DF74
(a)
V.STRETE
60mm67mm
Fig.3
1-42 (No.52156)
Page 43
Item
H. POSITION /
H. SIZE /
SIDE PIN /
TRAPEZIUM
Measuring
instrument
Test pointAdjustment partDescription
Signal
generator
Remote
control unit
(A)(B)
Fig.1
Screen size (91.5%)
[1.PICTURE/SOUND]
D02: EW
D03: H. SIZE
D07: EW. TRAP
D08: BOT. CORN
D09: TOP. CORN
D14: H. CENTER
(1) Receive the crosshatch pattern.
(2) Select the 4:3 mode.
(3) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(4) Adjust the < D14 > (H.CENT ER) so tha t (A) a nd (B)
become equal (Fig.1).
(5) Adjust the < D03 > (H. SIZ E) so that screen size is
91.5% of the picture size.
(6) Adjust the vertical line to straight by the < D02 >
(EW).
(7) If the corner pincushions are too bad, adjust the < D09 >
(TOP. CORN), < D08 > (BOT. CORN) and < D07 >
(EW. TRAP) to get exact corner pincushion of the
crosshatch pattern.
(8) Press the [MUTING] key to memorize the set value.
(9) Select the 16:9 mode.
(10) For the 16:9 mode, add the offset values a nd adjust
in the same as above.
(11) If adjustment is different, readjust each mode.
(12) Press the [MUTING] key to memorize the set value.
NOTE:
• Memorize the values every time after finishing
adjustments on each time.
• Confirm the H. position by monoscope and if it is
different, readjust the H. position again.
Repeat the adjustment of the H. size and side
pincushion.
(1) Input the NTSC black and white pattern(color off).
(2) Select the STANDARD mode with [VIDEO STATUS]
key.
(3) Select the 4:3 mode.
(4) Confirm that the COLOR TEMPERATURE is set at
the LOW.
(5) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(6) Confirm the initial setting values of the < S14 >
(CUTOFF R), < S16 > (CUTOFF G), < S18 >
(CUTOFF B).
(7) Select the 3.WHITE BALANCE from SERVICE
MENU.
(8) Display the horizontal line by pressing the [1] key.
(9) Turn the SCREEN VR all the way to the left, then
turn it gradually clockwise until either one of the red,
blue or green color is faintly visible.
(10) Use the [7]~[9], [100+], [0], [RETURN+/TV] keys and
adjust the other 2 colors to where the horizontal line
appears white.
(11) Press the [MUTING] key to memorize the set value.
(12) Press the [4] key to release the horizontal line mode.
(13) If there is a gap with the setting values, repeat the
steps 5. to 11. for readjustment.
(14) Input the 480i component video signal to
COMPONENT VIDEO terminal.
(15) Repeat the steps 5. to 11. as above.
(16) Confirm the 480i low-light at the 3.WHITE BALANCE
has been adjusted properly.
(17) Input the 1080i component video signal to the
COMPONENT VIDEO terminal.
(18) Repeat the steps 5. to 11. as above.
(19) Confirm that 1080i low-light at the 3.WHITE
BALANCE has been adjusted properly.
Adjustment item
S14: CUTOFF R
S16: CUTOFF G
S18: CUTOFF B
S20: CUTOFSWR
S21: CUTOFSWG
S22: CUTOFSWB
(R CUTOFF)
(G CUTOFF)
(B CUTOFF)
(R CUTOFF SW)
(G CUTOFF SW)
(B CUTOFF SW)
Setting value
196
196
196
1
1
1
1-44 (No.52156)
Page 45
Item
WHITE
BALANCE
(High Light)
DRIVE RDRIVE B
Setting
value
DRIVE R
DRIVE R
Measuring
instrument
Signal
generator
Remote
control unit
BR
R
DRV
R
CUT
REMOTE CONTROL UNIT
FREEZE
SWAP
( )
INPUT1
INPUT2
( )
INPUT3
INPUT4
THEATER
DIGITAL-IN
Test pointAdjustment partDescription
[1.PICTURE/SOUND]
S10: DRIVE R
S12: DRIVE B
(1) Input the NTSC black and white signal (color off).
(2) Select the STANDARD mode with [VIDEO STATUS]
key.
(3) Select the 4:3 mode.
[3.WHITE BALANCE]
(4) Confirm that the COLOR TEMPERATURE is set at
the LOW.
(5) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(6) Confirm the initial setting values of the < S10 >
Setting
value
B
B
G
(DRIVE R) and < S12 > (DRIVE B).
(7) Select the 3.WHITE BALANCE from SERVICE
MENU.
(8) Use the [2] and [5] or [3] and [6] to p roduce a white
screen.
(9) Press the [MUTING] key to memorize the set value.
(10) Make sure that the WHITE BALANCE tracking from
the LOW-LIGHT through the HIGH-LIGHT has been
properly done. [When the black and white signal
(color off) is received, the natural white should be
visible.]
(11) Input the 480i component video signal to
COMPONENT VIDEO terminal.
123
456
7809
RETURN
NATURAL
CINEMA
VIDEO
STATUS
PRO
/TV
DRIVE B
DRIVE B
( )
( )
(12) Repeat the steps 5. to 9. as above.
(13) Input the 1080i component video signal to
COMPONENT VIDEO terminal.
(14) Repeat the steps 5. to 9. as above.
(15) If there is a gap with the initial setting values, repeat
the steps 5. to 9. for readjustment.
(No.52156)1-45
Page 46
Item
SUB BRIGHTRemote
SUB
CONTRAST
Measuring
instrument
control unit
Remote
control unit
Test pointAdjustment partDescription
[1.PICTURE/SOUND]
S03: BRIGHT
[1.PICTURE/SOUND]
S04: CONTRAST
(1) Receive the NTSC color bar signal.
(2) Select the STANDARD mode with [VIDEO STATUS]
key.
(3) Select the 4:3 mode.
(4) Confirm that the COLOR TEMPERATURE is set at
the LOW.
(5) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(6) Set the initial setting value of the < S03 > (BRIGHT).
(7) If the brightness is not the best with initial setting
value, make fine adjustment of the < S03 > until you
get the best brightness.
(8) Press the [MUTING] key to memorize the set value.
(9) Select the THEATER mode with [VIDEO STATUS]
key.
(10) Repeat the steps 5. to 8. as above.
(11) Input the 480i component color bar signal.
(12) Repeat the steps 2. to 10. as above.
(13) Input the 1080i component color bar signal.
(14) Repeat the steps 2. to 10. as above.
(1) Receive the NTSC color bar signal.
(2) Select the STANDARD mode with [VIDEO STATUS]
key.
(3) Select the 4:3 mode.
(4) Confirm that the COLOR TEMPERATURE is set at
the LOW.
(5) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(6) 6.Set the initial setting value of the < S04 >
(CONTRAST).
(7) 7.If the contrast is not the best with the initial setting
value, make fine adjustment of the < S04 > until you
get the optimum contrast.
(8) Press the [MUTING] key to memorize the set value.
(9) Select the THEATER mode with [VIDEO STATUS]
key.
(10) Repeat the steps 5. to 8. as above.
(11) Input the 480i component color bar signal.
(12) Repeat the steps 2. to 10. as above.
(13) Input the 1080i component color bar signal.
(14) Repeat the steps 2. to 10. as above.
1-46 (No.52156)
Page 47
Item
SUB COLOR /
SUB TINT /
B-Y GAIN
Measuring
instrument
Signal
generator
Remote
control unit
Test pointAdjustment partDescription
[1.PICTURE/SOUND]
S01: COLOR
S02: TINT
S07: B-Y
[Method of adjustment without measuring instrument]
(1) Receive the composite NTSC color bar signal.
(2) Select the STANDARD mode with [VIDEO STATUS]
key.
(3) Select the 4:3 mode.
(4) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(5) Set the initial setting values of the < S01 > (COLOR) and
< S02 > (TINT).
(6) If the color or tint is not the best with the initial setting
values, make fine adjustment until you get the best
color or the best tint.
(7) Set the initial setting values of the < S07 > (B-Y).
(8) If the color bar is not clearly with the initial setti ng
value, make fine adjustment until you get the clearly
color bar.
(9) Press the [MUTING] key to memorize the set value.
(10) Select the THEATER mode with [VIDEO STATUS]
key.
(11) Repeat the steps 4. to 9. as above.
(12) Input the 480i component color bar signal to
COMPONENT VIDEO terminal.
(13) Repeat the steps 2. to 11. as above.
(14) Input the 480p component color bar signal to
COMPONENT VIDEO terminal.
(15) Repeat the steps 2. to 11. as above.
(16) Input the 1080i component color bar signal to
COMPONENT VIDEO terminal.
(17) Repeat the steps 2. to 11. as above.
(No.52156)1-47
Page 48
Item
SUB COLOR /
SUB TINT /
B-Y GAIN
Measuring
instrument
Signal
generator
Oscilloscope
Remote
control unit
W
W
Test pointAdjustment partDescription
TP-R
TP-B
TP-E
[1.PICTURE/SOUND]
S01: COLOR
S02: TINT
S07: B-Y
[Method of adjustment using measuring instru ment]
(1) Receive the composite NTSC COLOR BAR (75%
white) signal.
(2) Select the 4:3 mode.
(3) Connect the oscilloscope between TP-R and TP-E.
(4) Select the STANDARD mode with [VIDEO STATUS]
key.
(5) Select 1.PICTURE/SOUND from the SERVICE
MENU.
C
G
B
(6) Adjust the < S01 > (COLOR) and < S02 > (TINT) to
be the following setting value A [V] (Fig.3).
(7) Connect the oscilloscope between TP-B and TP-E.
(8) Adjust the < S07 > (B-Y) to be setting value C [V]
(Fig.3).
(9) Press the [MUTING] key to memorize the set value.
M
Fig.1
(-)
0
(+)
(W-R)(W-Y)Y
R
(10) Select the THEATER mode with [VIDEO STATUS]
key.
(11) Adjust the < S01 > and < S02 > to be the following
setting value B [V] (Fig.3).
(12) Adjust the < S07 > to b e setting value D [V] (Fig.3).
(13) Press the [MUTING] key to memorize the set value.
(14) Input the 480i component color bar signal to
COMPONENT VIDEO terminal.
(15) Repeat the steps 2. to 13. as above.
Y
G
R
C
M
(W-B)
B
(-)
0
(+)
(16) Input the 480p component color bar signal to
COMPONENT VIDEO terminal.
(17) Repeat the steps 2. to 13. as above.
(18) Input the 1080i component color bar signal to
COMPONENT VIDEO terminal.
(19) Repeat the steps 2. to 13. as above.
NOTE:
• Confirm that the low-light is not different after
adjusting COLOR, TINT and B-Y. If it is green or
magenta, adjust the low-light again.
Fig.2
• If the readjustment is carried out, set the off set values
again.
1-48 (No.52156)
Model name
& Input Setting
AV-32DF74
AV-36DF74
Setting value
NTSC(4:3)
480i(4:3)
480p(4:3)
1080i (16:9)
NTSC(4:3)
480i(4:3)
480p(4:3)
1080i (16:9)
A
STANDARD THEATER STANDARD THEATER
(W-R)/S01
+48
+39
+43
+39
+48
+40
+43
+39
(W-Y)/S02
+14
+21
+24
+10
+14
+21
+24
+11
(W-R)/S01
+27
+16
+19
+12
+28
+16
+19
+13
B
(W-Y)/S02
+2
+5
+3
+6
+2
+5
+2
+7
C
(W-B)/S07 (W-B)/S07
+12
+1
-1
-3
+15
+3
0
-3
Fig.3
[Unit : V]
D
+9
+1
-2
-9
+9
0
-3
-9
Page 49
4.7.6 MTS CIRCUIT
Item
MTS INPUT
LEVEL
Check
MPX
Signal
generator
Remote
control unit
MTS
SEPARATION
adjustment
TV audio
multiplex
signal
generator
Oscilloscope
Remote
control unit
L-Channel
signal waveform
1 cycle
Measuring
instrument
Test pointAdjustment partDescription
[1.PICTURE/SOUND]
A01: IN LEVEL
(1) Input the color bar signal (400Hz).
(2) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(3) Verify that the < A01 > (IN LEVEL) is set at its initial
setting value.
(4) Press the [MUTING] key to memorize the set value.
L OUT
R OUT
[1.PICTURE/SOUND]
A02: LOW SEP
A03: HI SEP
(1) Input the stereo L signal (300Hz) from the TV audio
multiplex signal generator to the antenna terminal.
(2) Connect an oscilloscope to L OUT pin of the AUDIO
OUT, and display one cycle portion of the 300Hz
signal.
(3) Change the connection of the oscilloscope to R OUT
pin of the AUDIO OUT, and enlarge the voltage axis.
(4) Select 1.PICTURE/SOUND from the SERVICE
MENU.
(5) Set the initial setting value of the < A02 > (LOW
SEP).
R-Channel
crosstalk portion
(6) Adjust the < A02 > so that the stroke e lement of the
300Hz signal will become minimum.
(7) Change the signal to 3kHz, and similarly adjust the
Minimum
< A03 > (HI SEP).
(8) Press the [MUTING] key to memorize the set value.
(No.52156)1-49
Page 50
4.8HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT
4.8.1 HIGH VOLTAGE HOLD DOWN CIRCUIT
After repairing the high voltage hold down circuit.
This circuit shall be checked to operate correctly.
4.8.2 CHECKING OF TH E HIGH VOLTAGE HOLD DOWN CIRCUIT
(1) Turn the power sw ON.
(2) As shown in figure bellow, set the resistor (between [S1] connector [2] & [3]).
(3) Make sure that the screen picture disappears (no raster).
(4) Temporarily unplug the power cord.
(5) Remove the resistor (between [S1] connector [2] & [3]).
(6) Again plug the power cord, make sure that no rmal pictures is displayed on the screen.
RESISTOR
CN2003 2
X-RAY
R2565
D2562
+
TP-E
D2561
C2562
S1 CONNECTOR
22.0K60
S1 SERVICE CONNECTOR
12345
R2561
R2563
C2811R2562
R2811D2812
+
12345
TP-91
B1
Y2503
10
4
5
6
8
3
1
9
12
T2502
FBT
1
2
7
1-50 (No.52156)
TP-E
( )
X-RAY2
X-RAY1
NC
TP-91
( B1:140V )
Page 51
SECTION 5
TROUBLESHOOTING
5.1SELF-DIAGNOSIS FEATURE
5.1.1 OUTLINE
This unit comes with the "Self-diagnosis" feature, which checks the operational state of the circuit and displays/saves it during failure.
Diagnosis is performed when power is turned on, and information input to the main microcomputer is monitored at all time. Diagnosis
is displayed in 2 ways via screen display and LED flashes. Failure detection is based on input state of I2C bus and the various control
lines connected to the main microcomputer.
5.1.2 HO W TO ENTER THE SELF-DIAGNOSIS MODE
(1) Press the [SLEEP TIMER] key of the remote control unit
and set the SLEEP TIMER 30 MIN.
(2) While it is being displa yed, press the [DISPLAY] key and
[VIDEO STATUS] key simultaneously.
(3) The TEST MODE screen is displayed.
(4) Press the [4] key.
The self-diagnosis screen is displayed.
5.1.3 HOW TO EXIT THE SELF-DIAGNOSIS MODE
Other exit from the SELF-DIAGNOSIS.
WITH INITIALIZATION
By using the remote controller unit, turn the power off.
At this time, the failure record is cleared.
WITH NOT INITIALIZATION
Take off the AC plug from the wall outlet. At this time, the
failure record is not cleared.
5.1.4 FAILURE HISTORY
The latest failure is stored on the record at the end.
The failure record for each check item is counted to the number
of 9 at the maximum.
Only SYNC is not counted and memorized.
TEST MODE SCREEN
TEST MODE
1.I2C STOP
2.STATUS DISP
4.SELF-CHK
5.CONVER OFF
ROM CORRECCTION : PAS
ROM VER :
Fig.1
4.SELF-DIAGNOSIS SCREEN
5
Fig.2
DO NOT OPEN
5.1.5 POINTS TO NOTE WHEN USING THE SELF-DIAGNOSIS FEATURE
In addition to circuit failures (abnormal operation),the following cases may also be diagnosed as "Abnormal" and displayed and
counted as "NG".
(1) Temporary defective transmissions across ci rcuits due to pulse interruptions
(2) Misalignment in the on/off timing of power for I
• Because of the timing of Vcc start-up and shutdown of the IC connecting to the I
2
C bus (Vcc) when turning on/off the main power.
2
C bus during which the power is turned on and off,
the operation may be interpreted as an error. In order to avoid the misinterpretation, the self- diagnosis functions should be started
at about 3 seconds after the power is turned on.
If recurrences are expected, ensure to clear (reset) the failure history and record the new diagnosis results.
(No.52156)1-51
Page 52
5.1.6 SELF-DIAGNOSIS DETAILS
IndicationCheck ItemDetails of detectionMethod of detection
XRAYX-ray protection------------
OCPB1 over-current
protection
LOBLow B protectionOperation of low B protection circuit.
LOBCRT neck protection Operation of CRT neck protection circuit.
TIMTimer (clock)The power frequency is changed as follows:
MEMMain memoryACK is returned when I2C traffic is carried out.
AVSWAV switchDitto
VCDVideo processDitto
AIOAudio Ditto
YC3D YC separationDitto
TUNRF tunerDitto
PPMulti screenDitto
IPDIST processDitto
HDMIDVI (Digital input)
process
SYNCPresence or absence
of synchronized
signal
B1 over-current is detected.
Q2971 (POWER & DEF PWB)
IC7001 (DIGITAL INPUT MODULE PWB)
Presence of synchronized signal.
HD: HD system / M: NTSC main / S: NTSC sub
IC1301 (AN15394A) : (MI-COM & DIST
MODULE PWB)
At about 3 seconds after the power is turned on, the self-check
function starts.
If NG is detected for 200ms, the power is turned off automatically.
At about 3 seconds after the power is turned on, the self-check
function starts.
If NG is detected for 200ms, the power is turned off automatically.
At about 3 seconds after the power is turned on, the self-check
function starts.
If NG is detected for 1.5s, the power is turned off automatically.
Periodically check the power frequency by counting the AC pulse
and monitor whether or not the frequency is changed except for the
time immediately after resetting.
The state is monitored every time when I2C traffic is carried out.
Then the state is counted as a failure if ACK is not returned.
Ditto
Ditto
Ditto
Ditto
Ditto
Ditto
Ditto
Ditto
When entering the self-check mode, "OK" is shown.
While running the mode with picture signal, if the synchronized
signal is disappeared, "NG" is shown.
5.1.7 SELF CHECK DISPLAY BY LED
The self-check results are shown on the following LED display.
Method of indication when the raster is not displayed.
Each failure is shown by turning LED on and off at the specified
intervals.
• For B1 over-current protection, CRT neck protection and Low
B protection, the power of the TV is turned off, if NG is detected. Immediately after the power is turned off, POWER LED will
be turning on and off. When the power is turned off, you cannot
turn the power on again until the AC plug is taken out an d put
in again.
1-52 (No.52156)
ItemPOWER LED ON / OFF intervals
B1 over-current protection Tumingon and off at 1-second intervals
Low B protectionTumingon and off at 2-second intervals
CRT neck protectionTumingon and off at 3-second intervals
Page 53
JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
www.jvcservice.com(US Only)
JVC CANADA INC.
Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7(416)293-1311
(No.52156)
Printed in Japan
WPC
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