JVC AV-29LS2, AV-29LX2, AV-2968TEE Schematic
SERVICE MANUAL
COLOUR TELEVISION
AV-29LS2
AV-29LX2
AV-2968TEE
BASIC CHASSIS
CH
AV-29LS2
AV-29LX2
POWER
MUTING
SYSTEM
COLOUR SOUND
ECO
SENSOR
DISPLAY
MENU
TV/TEXT
I/II
TV/VIDEO
123
OFF
TIMER
456
PICTURE
MODE
789
CHANNEL
RETURN+
SCAN
--
0-/
CHANNEL
VOLUME
TEXT
HOLD
INDEX
SIZE
REVEAL
SUBPAGE CANCEL
STORE MODE
TV
RM-C1020
RM-C1020-1H
[AV-29LS2]
RM-C1024-1H
[AV-29LX2]
[AV-29LX2
MUTING
SYSTEM
COLOUR SOUND
DISPLAY
TV/VIDEO
OFF
TIMER
PICTURE
MODE
CHANNEL
SCAN
CHANNEL
MENU
123
456
789
RETURN+
0-/
VOLUME
RM-C1024
TV
POWER
ECO
SENSOR
--
RM-C1023-1H
[AV-2968TEE]
/A
]
MUTING
SYSTEM
COLOUR SOUND
DISPLAY
MENU
TV/VIDEO
123
OFF
TIMER
456
PICTURE
MODE
789
CHANNEL
RETURN+
SCAN
0-/
VOLUME
CHANNEL
TEXT
REVEAL
INDEX
HOLD
SUBPAGE CANCEL
STORE MODE
RM-C1023
AV-29LX2 /A
AV-2968TEE
POWER
ECO
SENSOR
TV/TEXT
--
SIZE
TV
CONTENTS
a SPECIFICATIONS....................................................................................................................................2
a OPERATING INSTRUCTIONS (APPENDIX)
a SAFETY PRECAUTIONS ........................................................................................................................3
a FEATURES ..............................................................................................................................................4
a FUNCTIONS.............................................................................................................................................5
a SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................6
a SERVICE ADJUSTMENTS....................................................................................................................14
a STANDARD CIRCUIT DIAGRAM (APPENDIX) .................................................................................. 2-1
a PARTS LIST ...........................................................................................................................................41
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
No. 52062
Sep. 2002
AV-29LS2
AV-29LX2
AV-2968TEE
SPECIFICATIONS
Items
AV-29LS2 AV-29LX2 AV-29LX2/A
Dimensions (W × H × D)
Mass 47kg
TV RF System B, G, I, D, K, K1, M
Colour System TV Mode PAL / SECAM / NTSC3.58 / NTSC4.43
VIDEO Mode PAL / SECAM / NTSC3.58 / NTSC4.43
Stereo system A2 / NICAM (B/G, I, D/K) system Playback only
Teletext system
FLOF(Fastext), Q — Q
WST(World Standard Text)
Receiving Frequency VHF (VL) 46.25MHz – 140.25MHz (AS0 – S6)
VHF (VH) 147.25MHz – 423.25MHz (S7 – S36)
UHF 431.25MHz – 863.25MHz (S37 – CHINA 57)
CATV ● Cable TVs of Mid (X-Z, S1-S10)
Intermediate VIF Carrier 38.0MHz
Frequency 31.5MHz (6.5MHz)
SIF Carrier 32.0MHz (6.0MHz)
Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.40625MHz / 4.25MHz)
Aerial Input Terminal 75Ø Unbalanced
Power Input AC110 – 240V, 50 / 60Hz
Power Consumption 175W
Picture T ube Visible size : 68cm measured diagonally
High V oltage 32.0kV +1/ – 1.5kV (at cut-off in service mode)
Speaker 5 × 12cm Oval type ×2
Audio Output 7W + 7W
Video / Audio Input (1 / 2 / 3) Video(1,3) : 1Vp-p, 75Ø (RCA pin jack)
Video/Audio Output 1Vp-p, 75Ø (RCA pin jack)
Headphone Jack Stereo mini jack (3.5φ)
Remote Control Unit RM-C1020-1H RM-C1024-1H RM-C1023-1H
73.2cm × 58.8cm × 51.8cm
Super (S11-S20) & Hyper (S21-S41) bands receivable
32.5MHz (5.5MHz)
33.5MHz (4.5MHz)
NTSC (3.58MHz / 4.43MHz)
(Max.)
/ 116W
(Avg.)
Audio(1,2,3) : 500mVrms ( -4dBs ), High Impedance (RCA pin jack)
Component Input ( Input 2 )
Y:1Vp-p positive (negative sync provided, when terminated with 75Ø)
CB/CR :0.7Vp-p 75Ø
500mVrms(-4dBs)
Low impedance (400Hz when modulated 100%) (RCA pin jack)
(Battery size: AA/R06/UM-3 × 2)
Contents
AV-2968TEE
Design & specifications are subject to change without notice.
2No. 52062
SAFETY PRECAUTIONS
AC VOLTMETER
(HAVING 1000Ω/V,
OR MORE SENSITIVITY)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500Ω 10W
0.15µF AC-TYPE
GOOD EARTH GROUND
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 char acteristics as the recommended
replacement part shown in the parts list of Ser vice manual may
cause shock, fire, or other hazards.
4. Don't short between the LIVE side ground and ISOLA TED (NEU-
TRAL) side ground or EARTH side ground when repairing.
Some model's power circuit is partly different in the GND . The diff erence of the GND is shown by the LIVE : (
LA TED (NEUTRAL) : (
Don't short between the LIVE side GND and ISOLA TED (NEUTRAL)
side GND or EARTH side GND and never measure the LIVE side
GND and ISOLATED (NEUTRAL) side GND or EARTH side GND
at the same time with a measuring apparatus (oscilloscope etc.).
If above note will not be kept, a fuse or any parts will be broken.
5. If any repair has been made to the chassis, it is recommended that
the B1 setting should be checked or adjusted (See ADJUSTMENT
OF B1 POWER SUPPLY).
6. The high voltage applied to the picture tube must conf orm 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.
) side GND and EAR TH : ( ) side GND .
) side GND, the ISO-
AV-29LS2
AV-29LX2
AV-2968TEE
8. When service is required, observe the original lead dress. Extra
precaution should be given to assure correct lead dress in the high
voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced.
Always use the manufacturer's replacement components.
9. Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perf orm 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.
(1)Dielectric Strength Test
The isolation between the AC primary circuit and all metal parts
exposed to the user, particularly any exposed metal part having a
return path to the chassis should withstand a voltage of 3000V AC
(r.m.s.) for a period of one second.
(. . . . Withstand a v oltage of 1100V AC (r .m.s .) to an appliance rated
up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or
more, for a period of one second.)
This method of test requires a test equipment not generally found in
the service trade.
(2)Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Using a "Leakage Current
Tester", measure the leakage current from each exposed metal part
of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground (water pipe, etc.).
Any leakage current must not exceed 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).
● Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not use a line
isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner.
Connect a 1500Ø 10W resistor paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the A C v oltage 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.).
7. Do not check high voltage by drawing an arc. Use a high voltage
meter or a high voltage probe with a VTVM. Discharge the picture
tube before attempting meter connection, by connecting a clip lead
to the ground frame and connecting the other end of the lead through
a 10kØ 2W resistor to the anode button.
No. 52062 3
AV-29LS2
AV-29LX2
AV-2968TEE
FEATURES
s New chassis design enables use of an interactive on-screen control.
s Pure flat CRT produces fine textured picture in every detail.
s Wide range voltage (110V ~ 240V) for AC power input.
s With AUDIO/VIDEO/COMPONENT input terminals.
2
s I
C bus control utilizes single chip ICs.
s By means of AUTO PROGRAM, the TV stations can be selected
automatically and the TV channels can also be rearranged automatically.
s Built-in DIGITAL ECO MODE (ECONOMY, ECOLOGY).
In accordance with the brightness in a room, the brightness and/or
contrast of the picture can be adjusted automatically to make the
optimum picture which is easy on the eye.
s Built-in OFF TIMER & RETURN +.
MAIN DIFFERENCE LIST
!
Part Name
! MAIN PWB SCH-1108A-H2 SCH-1095A-H2 SCH-1104A-H2
FRONT CABINET ASS’Y LC11193-020A-H LC11193-018A-H LC11193-021A-H
REMOTE CONTROL UNIT RM-C1020-1H RM-C1024-1H
MODEL No.
AV-29LS2 AV-29LX2 AV-29LX2
/A AV-2968TEE
RM-C1023-1H
4No. 52062
FUNCTIONS
a FRONT PANEL
L/MONOVR
IN (VIDEO-3)
a REAR PANEL
VIDEO-1
INPUT
COMPONENT
(
)
VIDEO-2
INPUT
AV-29LS2
AV-29LX2
AV-2968TEE
OUTPUT
a REMOTE CONTROL UNIT
RM-C1020-1H
[AV-29LS2]
MUTING
SYSTEM
COLOUR SOUND
DISPLAY
MENU
I/II
TV/VIDEO
123
OFF
TIMER
456
PICTURE
MODE
789
CHANNEL
RETURN+
SCAN
CHANNEL
TEXT
HOLD
REVEAL
SUBPAGE CANCEL
STORE MODE
RM-C1020
V
L
/
R
MONO
0-/
VOLUME
INDEX
Y
/
V
C
B
C
R
POWER
ECO
SENSOR
TV/TEXT
SIZE
TV
V
L
L
/
MONO
R
R
RM-C1024-1H
[AV-29LX2]
[AV-29LX2
MUTING
SYSTEM
COLOUR SOUND
DISPLAY
TV/VIDEO
OFF
TIMER
PICTURE
MODE
CHANNEL
RETURN+
--
SCAN
CHANNEL
/A]
POWER
ECO
SENSOR
MENU
123
456
789
--
0-/
VOLUME
RM-C1024
TV
RM-C1023-1H
[AV-2968TEE]
MUTING
SYSTEM
COLOUR SOUND
DISPLAY
TV/VIDEO
OFF
TIMER
PICTURE
MODE
CHANNEL
RETURN+
SCAN
CHANNEL
REVEAL
HOLD
SUBPAGE CANCEL
STORE MODE
POWER
ECO
SENSOR
MENU
TV/TEXT
123
456
789
0-/
VOLUME
TEXT
INDEX
SIZE
RM-C1023
TV
--
No. 52062 5
AV-29LS2
AV-29LX2
AV-2968TEE
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power supply cord.
2. Remove the 16 screws marked
3. Withdraw the Rear cover toward you.
[CAUTION]
When reinstalling the rear cover, carefully push it inward after in-
•
serting the Main PWB into the rear cover groove.
as shown in Fig.1.
Å
REMOVING THE CHASSIS (CHASSIS BASE AND
CONTROL BASE)
After removing the rear cover.
•
1. Slightly raise the both sides of the chassis by hand and remov e the
2 claws marked
in Fig.1.
2. Withdraw the chassis backward.
(If necessary, take off the wire clamp, connector’s etc.)
When conducting a check with power supplied, be sure to confirm
*
that the CRT earth wire is connected to the CRT SOCKET PWB
and the Main PWB.
under the chassis from the front cabinet as sho wn
ı
REMOVING THE AV TERMINAL BOARD
After removing the rear cover.
•
1. Remove the 4 screws marked
2. When you pull out the AV Terminal board in the direction of arrow
marked
as shown in Fig.1, it can be removed.
Î
as shown in Fig.1.
Ç
CHECKING THE MAIN PW BOARD
1. To check the back side of the Main PWB.
1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).
2) Erect the chassis vertically so that you can easily check the back
side of the Main PWB.
[CAUTION]
When erecting the chassis, be careful so that there will be no con-
•
tacting with other PW Board.
Before turning on power, make sure that the CRT earth wire and
•
other connectors are properly connected.
When repairing, connect the Deg. coil to the DEG. connector on the
•
Main PWB.
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.
REMOVING THE CONTROL BASE
After removing the rear cover and the chassis.
•
1. While pushing down the 2 claws marked
pull out the Control base in the direction of arrow marked
shown in Fig. 2, the control base can be removed.
(If necessary, take off the wire, connector’s etc.)
as shown in Fig. 2 and
´
Ï
as
REMOVING THE SPEAKER
After removing the rear cover.
•
1. Remove the 4 scre ws marked
in Fig.1.
2. Withdraw the speaker backward.
3. Follow the same steps when removing the other hand speaker.
6No. 52062
and 2 scre ws marked Ó as sho wn
˝
PICTURE TUBE
[FRONT SIDE]
CONTROL BASE
AV-29LS2
AV-29LX2
AV-2968TEE
E
FRONT CABINET
H
G
SPEAKER
(×4)
FRONT CONTROL
PWB (1/2)
CONTROL BASE
CRT
SOCKET PWB
Fig.2
H
G
SPEAKER
H
F
CHASSIS
BASE
Fig.2
(×4)
FRONT CONTROL PWB (2/2)
MAIN PWB
CLAW B
AV TERMINAL
BOARD
H
REAR COVER
CHASSIS
BASE
CLAW B
A
D
C
(×4)
(×16)
Fig.1
No. 52062 7
AV-29LS2
AV-29LX2
AV-2968TEE
REMOVING THE CRT
* Replacement of the CRT should be perf ormed 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. 3).
2. While keeping the surface of CRT down, mount the TV set on the
CRT change table balanced will as shown in Fig. 4.
3. Remove 4 screws marked by arrows with a box type screwdriver as
shown in Fig. 4.
Since the cabinet will drop when screws have been remo ved, 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. 5.
The CRT should be assembled according to the opposite sequence
•
of its dismounting steps.
* The CRT change table should preferably be smaller that the CR T sur-
face, and its height be about 35cm.
CRT CHANGE TABLE
CLOTH
CRT
CHANGE
TABLE
Fig. 3
CRT
APPROX.
35cm
BOX
TYPE
SCREW
DRIVER
COA TING 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.
1. Wipe around the anode button with clean and dry cloth. (Fig. 6)
2. Coat silicon grease on the section around the anode button. At this
time, take care so that any silicon greases does not sticks to the
anode button. (Fig. 7)
夝 Silicon grease product No. KS - 650N
CRT
Anode button
CABINET
Approx.
20mm (Do not
coat grease on
this section
Fig. 4
CRT
CRT
CHANGE T ABLE
Fig. 5
Silicon grease
should be coated
by 5mm or more
from the outside
diameter of anode
cap.
Silicon grease
coating
Fig. 6
8No. 52062
Anode button
(No sticking of
silicon grease)
Coating position
of silicon grease
Anode cap
Fig. 7
REPLACEMENT OF MEMORY IC
1. MEMORY IC
This TV uses the following memory IC.
Memory IC: IC1702 on MAIN PW Board
The memory IC memorizes data for correctly operating the video
and deflection circuits. When replacing the memory IC, be sure to
use the same type IC written with the initial values of data. In other
words, use the specific IC listed in “PRINTED WIRING BOARD
PARTS LIST”. For its mounting location, refer to “ADJUSTMENT
LOCATIONS”.
2. PROCEDURE FOR REPLACING MEMORY IC
(1) Power off
Switch the power off and unplug the power cord from the wall
outlet.
(2) Replacing the memory IC
Replace the memory IC with new one. Be sure to use the memory
IC written with the initial data values.
(3) Power on
Plug the power cord into the wall outlet and switch the po wer on.
(4) Check and setting of SYSTEM CONSTANT SET:
1) Press the DISPLA Y k e y and the PICTURE MODE ke y on the
remote control unit simultaneously.
The SERVICE MENU screen will be displayed.(See Fig.1.)
2) In the SERVICE MENU, press the DISPLAY key and PICTURE MODE key simultaneously. Then, the SYSTEM CONSTANT SET screen will be displayed.(See Fig.2.)
3) Check whether the setting values of the SYSTEM CONSTANT
SET are the same as those indicated in Table1.
If the value is different, select the setting item with the MENU
&/^ key, and set the correct value with the MENU
4) Press the DISPLAY key twice to return to the normal screen.
(5) Receive channel setting
Refer to the OPERATING INSTRUCTIONS and set the receive
channels (channels preset).
(6) User setting
Check the user setting values in Table 2, and if setting value is
different, set the correct value.
For setting, refer to the OPERATING INSTRUCTIONS.
(7) Setting of SERVICE MENU
Verify the setting for each setting item in the SERVICE
MENU.(See Table 3.) If readjustment is necessary, perform adjustment referring to “SERVICE ADJUSTMENTS”.
NAME OF REMOTE CONTROL KEYS
POWER
ECO
SENSOR
MENU
TV/TEXT
123
456
789
--
0-/
VOLUME
TEXT
HOLD INDEX
SIZE
DISPLAY
MENU
PICTURE
MODE
MUTING
SYSTEM
COLOUR SOUND
DISPLAY
I/II
TV/VIDEO
OFF
TIMER
PICTURE
MODE
CHANNEL
RETURN+
SCAN
CHANNEL
REVEAL
SUBPAGE CANCEL
STORE MODE
*/T
MENU
MENU
MENU
AV-29LS2
AV-29LX2
AV-2968TEE
SERVICE MENU
SERVICE MENU
1. IF
3. DEF
5. PRESET
7. PLUG & PLAY (ON)
1-7 : SELECT DISPLAY : EXIT
******* **** ***** *****
**** **** *** ***
1. IF
3. DEF
5. PRESET
6. PLUG & PLAY (ON)
1-6 : SELECT DISPLAY : EXIT
******* **** ***** *****
**** **** *** ***
[AV-29LX2, AV-29LX2/A, AV-2968TEE]
2. VC
4. VSM PRESET
6. A2NICAM
[AV-29LS2]
SERVICE MENU
2. VC
4. VSM PRESET
Fig. 1
key.
SYSTEM CONSTANT-
SYSTEM CONSTANT SET 1
SYSTEM
COMB
TILT
TEXT
SUPER BASS
LANGUAGE
>? : SEL -+ : OPE
SYSTEM CONSTANT-
SYSTEM CONSTANT SET 2
MSP
BILINGUAL
B / B SOUND
TUNER
COLOUR AUTO
>? : SEL -+ : OPE
SYSTEM CONSTANT-
SYSTEM CONSTANT SET 3
LOCK 1 MHz
>? : SEL -+ : OPE
500 KHz
250 KHz
156. 25 KHz
31.25 KHz
MULTI
YES
YES
ERCMI
YES
E/R/C/M/I
DISP : EXIT
YES
YES
NO
MU
YES
DISP : EXIT
: 040
: 040
: 040
: 030
: 030
DISP : EXIT
Ι
II
III
+
SYSTEM CONSTANT-
SYSTEM CONSTANT SET 4
3D SURROUND
3CH VOL/TONE
AMP TUNER
>? : SEL -+ : OPE
Fig. 2
YES
YES
NO
DISP : EXIT
IV
No. 52062 9
AV-29LS2
AV-29LX2
AV-2968TEE
SETTING OF SYSTEM CONSTANT SET
Setting item Setting content
SYSTEM
COMB
TILT
TEXT
SUPER BASS
LANGUAGE
MSP
BILINGUAL
B/B SOUND
TUNER
COLOUR AUTO
LOCK 1MHz
MULTI TRIPLE PAL SINGLE VIET
YES NO
YES NO
ERCMI ERAPU NO
YES NO
E/R/C/M/I E/R/C E/C
E/R/A/P/U E/R/A/P E/R/U
YES NO
YES NO
YES NO
MU MA
YES NO
000 240
AV-29LX2AV-29LS2
MULTI
YES
YES
ERCMI NO
NO
E/R/C/M/I
–
NO
NO
MU
NO
040
E/R/A/P E/R/A/P/U
–
NOYES
Setting value
––
YES
YES
/A
AV-2968TEEAV-29LX2
ERAPU
NO
NO
500KHz
250KHz
156.25KHz
31.25KHz
3D SURROUND
3CH VOL/TONE
AMP TUNER
000 240
000 240
000 240
000 240
YES NO
YES NO
YES NO
040
040
030
030
NO
YES
NO
Table 1
10 No. 52062
USER SETTING VALUES
Setting item Setting value
SUB POWER ON
CHANNEL POSITION 1 POSITION
CHANNEL PRESET REFER TO OPERATING INSTRUCTIONS
VOLUME 15 ± 2
TV/VIDEO TV
VNR OFF
COMPRESS (16:9) OFF
AUTO SHUTOFF OFF
CHILD LOCK OFF
BLUE BACK ON
VIDEO-2 SET VIDEO
LANGUAGE ENG
AI VOLUME ON
ON SCREEN DISPLAY POSITION INDICATION
COLOUR SYSTEM PAL
SOUND SYSTEM B/G
STEREO MODE STEREO [AV-29LS2 only]
PICTURE MODE-VSM BRIGHT
OFF TIMER 00
ECO SENSOR OFF
BASS CENTRE
TREBLE CENTRE
BALANCE CENTRE
Table 2
AV-29LS2
AV-29LX2
AV-2968TEE
No. 52062 11
AV-29LS2
AV-29LX2
AV-2968TEE
SERVICE MENU SETTING ITEMS
Service menu Setting item
1. IF 1. VCO
2. DELAY POINT
2. VC 1. CUTOFF(R/G)
2. DRIVE(R/G/B)
3. BRIGHT
4. CONT
5. COLOUR
6. TINT
7. SHARP
8. YDELA Y
9. AMP T. SHARP
3. DEF 1. VER. SLOPE
2. VER. HEIGHT
3. VER. POSITION
4. VER. SCURVE
5. HOR. POSITION
6. HOR. WIDTH
7. EW-PIN
8. EW-TRAPEZ
9. UP CORNER
10. DW CORNER
11. HOR. PARALL
12. HOR. BOW
13. V. ZOOM
4. VSM PRESET 1. TINT
(BRIGHT/STD/SOFT) 2. COLOUR
Do not adjust
3. BRIGHT
4. PICTURE
5. DETAIL
Do not adjust
Service menu Setting item
5. PRESET 1. PSNS
Do not adjust
6. A2NICAM 1. ERROR LIMIT
[AV-29LS2 only] 2. A2 ID THR
Do not adjust
2. ACL
3. MUS
4. MAT
5. FCO
6. BPS
7. IFLH
8. VID
9. STM
10. AFCW
11. VSW
12. FFI
13. A GC
14. CL
15. AKB
16. HBL
17. BKS
18. READ STATUS
19. VNR
20. PEAK
21. IVG
22. WPL
23. SOFT CLIPPER
24. IF PLL OFFSET
25. OVERSHOOT
26. HCO
27. HP2
28. AI VOLUME ADN
31. CCCLOOP
3. SOUND SYSTEM
Table 3
12 No. 52062
6/7.
PLUG & PLAY(ON)
Do not adjust
REPLACEMENT OF CHIP COMPONENT
CAUTIONS
a
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.
SOLDERING IRON
a
1. Use a high insulation soldering iron with a thin pointed end of it.
2. A 30w soldering iron is recommended for easily remo ving parts.
REPLACEMENT STEPS
a
1. How to remove Chip parts
Resistors, capacitors, etc.
(1) As shown in the figure, push the part with tweezers and alter-
nately melt the solder at each end.
AV-29LS2
AV-29LX2
AV-2968TEE
2. How to install Chip parts
Resistors, capacitors, etc.
(1) Apply solder to the pattern as indicated in the figure.
(2) Shift with tweezers and remove the chip part.
Transistors, diodes, variable resistors, etc.
(1) Apply extra solder to each lead.
SOLDER
(2) As shown in the figure, push the part with tweezers and alter-
nately melt the solder at each lead. Shift and remove the chip
part.
SOLDER
(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
(4) Then solder leads B and C.
A as indicated in the figure.
A
B
C
A
Note : After removing the part, remove remaining solder from the
pattern.
No. 52062 13
B
C
AV-29LS2
AV-29LX2
AV-2968TEE
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION
1. You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment equipment and parts
as given below.
2. Adjustment with the remote control unit is made on the basis of the initial setting values, howe ver , the new setting v alues 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 the set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
6. Never touch any adjustment parts, which are not specified in the list for this adjustment-variable resistors, transformers, capacitors, etc.
7. Presetting before adjustment.
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
User mode setting position
•
Setting item Setting value
PICTURE MODE(VSM) BRIGHT
VNR OFF
BASS, TREBLE, BALANCE CENTRE
TINT, COLOUR, BRIGHT, DETAIL CENTRE
PICTURE MAXIMUM
MEASURING INSTRUMENT
1. DC voltmeter (or Digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [PAL/SECAM/NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
B1 POWER SUPPLY
•
FOCUS ADJUSTMENT
•
IF CIRCUIT ADJUSTMENTS
•
Adjustment of VCO (CW)
Adjustment of DELAY POINT (AGC TAKE-OVER)
VC (VIDEO/CHROMA) CIRCUIT ADJUSTMENTS
•
Adjustment of WHITE BALANCE (Low light)
Adjustment of WHITE BALANCE (High light)
Adjustment of SUB BRIGHT
Adjustment of SUB CONTRAST
Adjustment of SUB COLOUR-Ι
Adjustment of SUB COLOUR-ΙΙ
Adjustment of SUB TINT-Ι
Adjustment of SUB TINT-ΙΙ
DEFLECTION CIRCUIT ADJUSTMENTS
•
Adjustment of V. SLOPE
Adjustment of V. POSITION
Adjustment of V. HEIGHT
Adjustment of H. POSITION
Adjustment of H. WIDTH
Adjustment of SIDE PIN
Adjustment of TRAPEZIUM
Adjustment of V. S-CURVE
Adjustment of CORNER
Adjustment of H. PARALLEL
Adjustment of H. BOW
VSM PRESET SETTING
•
PRESET SETTING
•
AUDIO ADJUSTMENT [AV-29LS2 only]
•
PURITY ADJUSTMENT
•
CONVERGENCE ADJUSTMENTS
•
Adjustment of STATIC CONVERGENCE
Adjustment of DYNAMIC CONVERGENCE
14 No. 52062
ADJUSTMENT LOCATIONS
E1
TOP
CRT EARTH
(BRAIDED ASS'Y)
U
TP-47B
TP-47G
HV
61
GND B1
UPPER : FOCUS (F1)
MIDDLE : FOCUS (F2)
IC702
CRT SOCKET PWB ASS’Y
(SOLDER SIDE)
1
16
FRONT
FRONT
FRONT
AV IN/OUT
HVT
MAIN PWB ASS’Y
FRONT CONTROL PWB ASS’Y(1/2) FRONT CONTROL PWB ASS’Y(2/2)
J304 J303 J302
S804
S805
S806 S802
S803S801 J801
CN003
CN002
CN00A
CN001
CN002
PW
POWER
SW.
W
R
S901
S801 : CH UP +
S802 : CH DOWN –
S803 : MENU
S804 : TV/VIDEO
S805 : VOL UP+
S806 : VOL DOWN –
1
1
6
16
5
S
U
LOWER : SCREEN
TU001
J804J801 J802 J803
IC701
Z
CN001
W
T
DEG
TP-E
T
61
T
61
AV-29LS2
AV-29LX2
AV-2968TEE
No. 52062 15
AV-29LS2
AV-29LX2
AV-2968TEE
BASIC OPERATION IN SERVICE MENU
1. TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the remote control unit.
2. SERVICE MENU ITEMS
With the SERVICE MENU,various settings (adjustments)can be made,and they are broadly classified in the following items of settings:
1.IF......................................For entering/adjusting the setting values (adjustment values)of the IF circuit.
•
2.VC ....................................For entering/adjusting the setting values (adjustment values)of the VIDEO/CHROMA circuit.
•
3.DEF..................................For entering/adjusting the setting values (adjustment values)of the DEFLECTION circuit.
•
4.VSM PRESET..................For setting the values of STANDARD,SOFT and BRIGHT.
•
5.PRESET...........................For setting the values of the preset.
•
6.A2NICAM .........................For entering/adjusting the setting values (adjustment values)of the multiplicity sound circuit. [AV-29LS2 only]
•
6/7. PLUG & PLAY (ON) .....This is not used for service.
•
3. BASIC OPERATION IN SERVICE MENU
(1) How to enter SERVICE MENU
Press the DISPLAY key and the PICTURE MODE key on the remote control unit simultaneously.
The SERVICE MENU screen will be displayed. (See Fig. 1 on the next page.)
(2) Selection of SUB MENU SCREEN
Press one of the keys 1 to 7 on the remote control unit,and select the SUB MENU SCREEN from the SER VICE MENU.(See Fig.1 on the next
page.)
(VSM:video status memory)
SERVICE MENU → SUB MENU 1. IF
2. VC
3. DEF
4. VSM PRESET
5. PRESET
6. A2NICAM [AV-29LS2 only]
6/7. PLUG & PLAY (ON)
(3) Method of Setting
*Once the setting values are set,they are memorized automatically.
*It must not adjust without inputting a signal.
1) 1. IF
[1.VCO ]
(a) 1 Key......................... Select 1. IF.
(b) 1 Key......................... Select 1. VCO.
(c) DISPLAY Key............ When this is pressed twice, you will return to the SERVICE MENU.
Under normal conditions, no adjustment is required.
[2.DELAY POINT ]
(a) 1 Key......................... Select 1. IF.
(b) 2 Key......................... Select 2.DELA Y POINT.
(c) MENU
(d) DISPLAY Key............ When this is pressed twice, you will return to the SERVICE MENU.
2) 2. VC, 3. DEF, 4. VSM PRESET, 5. PRESET and 6. A2NICAM
(a) 2 ~6 Keys.................. Select one from 2. VC, 3. DEF, 4. VSM PRESET, 5. PRESET and 6. A2NICAM.
(b) MENU &/^ key........ Select setting items.
(c) MENU
(d) DISPLAY Key............ When this is pressed, you will return to the SERVICE MENU.
*/T
Key ........ Adjust the setting value.
*/T
Key ........ Adjust the setting values of the setting items.
•
Use the number keys on the remote control unit for setting of WHITE BALANCE.
•
For the setting, refer to each item concerned.
3) 6/7. PLUG & PLAY (ON)
This is not used for service.
(4) Release of SERVICE MENU
After completing the setting, return to the SERVICE MENU by pressing the DISPLAY key, then again press the DISPLAY ke y to return to the
normal screen.
16 No. 52062
SERVICE MENU
AV-29LS2
AV-29LX2
AV-2968TEE
SUB MENU 1. IF
SERVICE MENU
1. IF
3. DEF
5. PRESET
7. PLUG & PLAY (ON)
1-7 : SELECT DISPLAY : EXIT
******* **** ***** *****
**** **** *** ***
2. VC
4. VSM PRESET
6. A2NICAM
[AV-29LS2]
SERVICE MENU
1. IF
3. DEF
5. PRESET
6. PLUG & PLAY (ON)
1-6 : SELECT DISPLAY : EXIT
******* **** ***** *****
**** **** *** ***
2. VC
4. VSM PRESET
[AV-29LX2, AV-29LX2 /A, AV-2968TEE ]
IF
1. VCO
2. DELAY POINT
1-2 : SELECT DISPLAY : EXIT
SUB MENU 2. VC
V/C
AUTO
1. CUTOFF
50 Hz
MENU 89: SELECT
MENU -/+: OPERATE
(R)
(G)
DISPLAY : EXIT
**
**
Setting item
1. CUTOFF (R/G)
2. DRIVE (R/G/B)
3. BRIGHT
4. CONT
5. COLOUR
6. TINT
7. SHARP
8. YDELAY
9. AMP T.SHARP
VCO (CW)
TOO HIGH
ABOVE REFERENCE
BELOW REFERENCE
TOO LOW
DELAY POINT UHF
AGC TAKE-OVER
-
/+: OPERATE
MHz
*****
DISPLAY : EXIT
**
DISPLAY : EXIT
SUB MENU 6. A2NICAM
[AV-29LS2]
1. ERROR LIMIT
C AD BITS
NICAM ERROR
MENU 89: SELECT
MENU
-
/+: OPERATE
DISPLAY : EXIT
Setting item
1. ERROR LIMIT
2. A2 ID THR
3. SOUND SYSTEM
SUB MENU 5. PRESET
PRESET 50Hz
1. PSNS
MENU 89: SELECT
-
/+: OPERATE
MENU
DISPLAY : EXIT
*****
******
PALB/G
*
MHzA2NICAM
****
****
1. PSNS
2. ACL
3. MUS
4. MAT
5. FCO
6. BPS
7. IFLH
8. VID
9. STM
SUB MENU 3. DEF
DEF
4 : 3
PAL
1. VER. SLOPE
50Hz
MENU 89: SELECT
-
/+: OPERATE
MENU
**
DISPLAY : EXIT
SUB MENU 4. VSM PRESET
STANDARD
TINT
COLOUR
BRIGHT
PICTURE
DETAIL
MENU 89: SELECT
MENU
-
/+: OPERATE
10. AFCW
11. VSW
12. FFI
13. AGC
14. CL
15. AKB
16. HBL
17. BKS
18. READ STATUS
19. VNR
**
**
**
**
**
DISPLAY : EXIT
Setting item
1. VER. SLOPE
2. VER. HEIGHT
3. VER. POSITION
4. VER. SCURVE
5. HOR. POSITION
6. HOR. WIDTH
BRIGHT / STD / SOFT
Setting item
1. TINT
2. COLOUR
3. BRIGHT
PICTURE
4.
5. DETAIL
20. PEAK
21. IVG
22. WPL
23. SOFT CLIPPER
24. IF PLL OFFSET
25. OVERSHOOT
26. HCO
27. HP2
28. AI VOLUME ADN
31. CCCLOOP
4 : 3 / 16 : 9
Setting item
7. EW-PIN
8. EW-TRAPEZ
9. UP CORNER
10. DW CORNER
11. HOR. PARALL
12. HOR. BOW
13. V. ZOOM
Fig. 1
No. 52062 17
AV-29LS2
AV-29LX2
AV-2968TEE
ADJUSTMENTS
B1 POWER SUPPLY
Item
Measuring
instrument
Test point Adjustment part Description
Check of
B1 POWER
SUPPLY
Signal
Generator
DC V oltmeter
FOCUS ADJUSTMENT
Item
Adjustment
of FOCUS
Measuring
instrument
Signal
generator
B1 (pin 1)
GND (pin 5)
[CN00S
connector
in MAIN
PWB]
Test point Adjustment part Description
FOCUS VR
[In HVT]
1. Receive a black and white signal.
2. Connect a DC voltmeter between B1 and GND
(between pins 1 and 5 of the connector CN00S).
3. Make sure that the voltage is DC134.5 ± 2V.
Notes:
•Set PICTURE MODE (VSM) to “BRIGHT”.
•The final adjustment of CONVERGENCE must be done after the
FOCUS adjustment. (CONVERGENCE is changed by FOCUS adjustment.)
When makes difference by FOCUS adjustment, should be reconfirming
PURITY adjustment.
1. Receive a cross-hatch signal.
2. While looking at the screen centre, adjust the FOCUS VR so that
the vertical and horizontal lines will be clear and in fine detail.
3. Make sure that the picture is in focus even when the screen gets
darkened.
IF CIRCUIT ADJUSTMENTS
Item
Adjustment
of VCO (CW)
Adjustment
of DELAY
POINT
(AGC
TAKE-OVER)
(AGC TAKE-O VER)
Measuring
instrument
Remote
control unit
VCO (CW)
TOO HIGH
ABOVE REFERENCE
BELOW REFERENCE
TOO LOW
Remote
control unit
Setting Initial setting value
(Adjustment time) NTSC 3.58 OTHERS
DELAY POINT
Test point Adjustment part Description
. MHz
DISPLAY : EXIT
VCO (CW)
fv
YELLOW
DELAY POINT
2630
Note:
•Under normal conditions, no adjustment is required.
1. Select 1. IF from the SERVICE MENU.
2. Select 1. VCO by pressing the 1 key on the remote control unit.
3. Receive a broadcast signal.
4. Check the characters colour of the BELOW REFERENCE displayed
to yellow.
5. Press the DISPLAY key three times to return to normal screen.
1. Receive a black and white broadcast signal (colour off).
2. Select 1. IF from the SERVICE MENU.
3. Select 2. DELAY POINT by pressing the 2 key on the remote con-
trol unit.
4. Adjust the MENU
from the image. An y increase above the initial v alue produces noise
and any decrease below it produces beat.
5. Press the DISPLA Y key three times to return to the normal screen.
6. Turn to other channels and make sure that there are no irregularities.
*/T
key in order to eliminate any noise or beat
18 No. 52062
AV-29LS2
AV-29LX2
AV-2968TEE
VC (VIDEO/CHROMA) CIRCUIT ADJUSTMENTS
The setting (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.
Do not change the initial setting values of the setting (adjustment) items not listed in “ADJUSTMENT”.
•
[SUB MENU 2. VC] : Do not adjust.
Setting (Adjustment)
item
Variable range
PAL SECAM NTSC3.58 NTSC4.43 COMPONENT (V–2)
1 CUT-OFF (R/G) -32 – +31 0/0 -2/+14
2 DRIVE (R/G/B) -32 – +31 0/0/0
3 BRIGHT (TV/V-1/V-2/V-3) -32 – +31 -13/0/0/+1 —/—/-1/—
4 CONT -32 – +31 -10 —
5 COLOUR -32 – +31 -4 -13 -11 +1 0
6 TINT (TV/VIDEO) -32 – +31 — — -15/+2 —/+1 —
7 SHARP (TV/VIDEO) -32 – +31 -28/-22 —/0
8Y DELAY (TV/VIDEO) -8 – +7 -7/+1 0/+1 0/0 —/+1
9 AMP T. SHARP -32 – +31 0
Initial setting value
Item
Adjustment
of WHITE
BALANCE
(Low light)
H.LINE OFF
H.LINE ON
R. LEVEL (
Measuring
instrument
Signal
generator
Remote
control unit
MENU : SELECT
MENU -/+: OPERATE
REMOTE CONTROL UNIT
12 3
4
8
)
56
Test point Adjustment part Description
1.CUTOFF (R)
CUTOFF (G)
Note:
•Set PICTURE MODE (VSM) to “BRIGHT”.
SCREEN VR
[In HVT]
1. Receive a PAL black and white signal (colour off).
2. Select 2. VC from the SERVICE MENU.
3. Select 1. CUTOFF (R) and (G) with MENU &/^ key, and set each
value to initial setting value with the 4 and 7 keys, or 5 and 8 keys on
the remote control unit.
4. Press the 1 key on the remote control unit to produce a single hori-
zontal line.
5. Turn the SCREEN VR fully counterclockwise , then slowly turn it clock-
1. CUTOFF
50 Hz
V/C
(R)
(G)
PAL
**
**
wise to where a red, blue or green colour is faintly visible.
DISPLAY : EXIT
6. Use the keys 4 and 7 or 5 and 8 on the remote control unit and
adjust the other 2 colours to where the single horizontal line appears white.
7. Turn the SCREEN VR to where the single horizontal line glows f aintly .
8. Press the 2 key to return to 1. CUTOFF screen.
9. Press the DISPLAY key twice to return to the normal screen.
Setting (Adjustment) Variable Initial setting
Item range value
G. LEVEL (8)
1. CUT OFF
R –32 — +31 0
G –32 — +31 0
R. LEVEL (
789
)
9
G. LEVEL (
)
9
No. 52062 19
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