JVC AV-28WFR1EKS/A User manual

No.51695B
Nov. 2000
AV-28WFR1EKS
AV-28WFR1EK
1COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
AV-28WFR1EKS/A
AV-28WFR1EK/A
HOW TO IDENTIFY MODELS
While referring to the illustration given below, identify model name on the rating label affixed to the rear cover.
Model
Parts AV-28WFR1EKS/A AV28WFR1EK/A
!Rating label LC20091-030A-U LC20091-029A-U
SERVICE MANUAL
COLOUR TELEVISION
BASIC CHASSIS
JK
The following items for the AV-28WFR1EKS/A / AV-28WFR1EK/A models were changed from
those of the AV-28WFR1EKS / AV-28WFR1EK models.
Therefore, this service manual describes only the items which differ from those of the AV-
28WFR1EKS / AV-28WFR1EK service manual.
For details other than those described in this manual, please refer to the AV-29RF6sc
service manual(No.51754, JUL. 2000).
AV-28WFR1EKS / AV-28WFR1EK
Indicated “A”

No. 51695B
AV-28WFR1EKS
AV-28WFR1EK
2
CHANGED ITEMS
USING PW BOARD DIFFERENCE TABLE (Page 38)
Model
PWB ASS’y
AV-28WFR1EKS
AV-28WFR1EK
No.51695
AV-28WFR1EKS/A
AV-28WFR1EK/A
No.51695B
MAIN PWB SJK-1904A-U2 SJK-1906A-U2
POWER & DEF. PWB SJK-2504A-U2 SJK-2508A-U2
CRT SOCKET PWB SJK-3502A-U2 SJK-3503A-U2
FRONT CONTOROL
PWB SJK-8504A-U2 SJK-8506A-U2
AV SEL. PWB SJK0S902A-U2 SJK0S905A-U2
PARTS DIFFERENCE TABLE
MODEL No. AV-28WFR1EKS
AV-28WFR1EK
No.51695
AV-28WFR1EKS/A
AV-28WFR1EK/A
No.51695B
!
!!
!REF.
No. PARTS No. PARTS No.
PARTS NAME
EXPLODED VIEW PARTS LIST (Page 36)
!L01 QQW0070-001 QQW0100-001 DEG COIL
!L03 CELD904-001 ROTATION COIL
!V01 W66ERF031X013 W66QDE891X923 CRT(ITC)
!T2551 QQH0065-002-I2 QQH0089-002-I2 FBT(SERVICE)
!6 QNZ0407-002 QNZ0369-003 ANODE WIRE
!11 LC20091-010A-U
(AV-28WFR1EKS) LC20091-029A-U
(AV-28WR1EKS/A)RATING LABEL
!11 LC20091-017A-U
(AV-28WFR1EK) LC20091-030A-U
(AV-28WFR1EK/A)RATING LABEL
!100 LC10662-008B-U
(AV-28WFR1EKS) LC10662-008C-U
(AV-28WFR1EKS/A)FRONT CABINET ASSY
!100 LC10662-004C-U
(AV-28WFR1EK) LC10662-004D-U
(AV-28WFR1EK/A)FRONT CABINET ASSY
PACKING PARTS LIST(Page 49)
LCT0931-001A-U INST SHEET
PRINTED WIRING BOARD PARS LIST
MAIN PW BOARD ASS’Y (Page 39)
PW BOARD No. SJK-1904A-U2 SJK-1906A-U2
!Symbol No. PARTS No. PARTS No. PARTS NAME DESCRIPTION
C1726 NDC21HJ-391X NDC21HJ-821X C CAP. 820pF 50V J

No. 51695B
AV-28WFR1EKS
AV-28WFR1EK
3
POWER & DEF. PW BOARD ASS’Y(Page 41~42)
PW BOARD No. SJK-2504A-U2 SJK-2508A-U2
!Symbol No. PARTS No. PARTS No. PARTS NAME DESCRIPTION
R2403 QRE141J-123 QRA14CF-3091Y CR 3.09kΩ1/4W F
R2414 QRE121J-3R9Y QRE121J-100Y CR 10Ω1/2W J
R2467 QRG039J-120 QRL039J-330 OM R 33Ω3W J
R2551 QRT039J-3R3 QRT039J-1R5 MF R 1.5Ω3W J
R2552 QRT039J-3R3 QRT039J-1R5 MF R 1.5Ω3W J
!R2554 QRZ9021-1R5 QRZ9022-R47 FR 0.47Ω1W J
!R2556 QRZ9011-4R7 FUSI. RESISTER Delete
!R2557 QRZ9021-100 FUSI. RESISTER Delete
C2461 QETN2AM-475Z QEZ0195-475Z E CAP. 4.7μF 50V M
!C2521 QFZ0200-352 QFZ0200-282 MPP CAP. 2800pF 1.5kVH ±3％
!C2523 QFP32GJ-223 QFP32GJ-183 PP CAP. 0.018μF 400V J
C2524 QFM72DK-104 QFM72DK-563 M CAP. 0.056ΜF 200V K
C2525 QFZ0199-354 MPP CAP. Delete
C2526 QFZ0199-254 QFZ0197-304 MPP CAP. 0.3μF 250V J
C2528 QFZ0199-683 MPP CAP. Delete
C2529 QFZ0199-104 QFZ0197-473 MPP CAP. 0.047μF 250V J
C2532 QFZ0199-334 MPP CAP. Delete
C2542 QFZ0199-204 QFZ0197-434 MPP CAP. 0.43μF 250V J
C2543 QFZ0199-154 QFZ0197-184 MPP CAP. 0.18μF 250V J
C2561 QFLC1HJ-683Z QFV71HJ-184Z M CAP 0.18μF 50V J
T2521 CE42549-001J1 BRIGE COIL Delete
!T2551 QQH0065-002-I2 QQH0089-001 FBT
T2561 QQR0898-001 QQH0898-001 DEF.TRANSF.
L2461 QQLZ028-822 QQLZ027-821 CHOKE COIL
L2521 QQLZ028-101 QQLZ028-501 CHOKE COIL
D2403 1SS133-T2 SI.DIODE Delete
D2555 MTZJ12C-T2 ZENER DIODE Delete
D2556 MTZJ12C-T2 ZENER DIODE Delete
K2501 CE41433-001Z BEADE CORE Delete
K2502 CE41433-001Z BEADE CORE Delete
!PC2901 TLP721F(D4-GR) TLP421F/D4-GR/ I.C. (PH.COUPLER)

28WFR1EKSA-U #003
28WFR1EKA-U #003
4Printed in Japan
VP 0011
DP2050
VICTOR COMPANY OF JAPAN, LIMITED
HOME AV NETWORK BUSINESS UNIT 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan

No.51754
Jul. 2000
A
V-29RF6
1COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
AV-29RF6(C SC)
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････････････････
･･････････････････････････････････････････････････････････
･････････････････････････････ 2
★
OPERATING INSTRUCTIONS (APPENDIX) ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････
･･････････････
･･･････ 1-1
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 3
!FEATURES ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･
････
･･ 4
!FUNCTIONS････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･
････
･･ 5
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････
･･････････････････････････
･････････････ 6
!SERVICE ADJUSTMENTS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････････
･･････････････････････････････････････････
･････････････････････ 13
★
STANDARD CIRCUIT DIAGRAM (APPENDIX) ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････
･･････････
･････ 2-1
!PARTS LIST････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･
･･
･33
BASIC CHASSIS
JK
SERVICE MANUAL
COLOUR TELEVISION

No.51754
A
V-29RF6
2
SPECIFICATIONS
Item CONTENTS
Dimensions ( W×
××
×H×
××
×D ) 732mm×588mm×508mm
Mass 52kg
TV RF System B, G, I, D, K, K1, M
Colour System PAL, SECAM, NTSC3.58, NTSC4.43
Stereo System A2 / NICAM (B/G, I, D/K) system
Receiving Frequency VHF(L) 46.25MHz～168.25MHz
VHF (H) 175.25MHz～463.25MHz
UHF 471.25MHz ～863.25MHz
CATV Mid(X-Z, S1-S10), Super(S11-S20), Hyper(S21-S41) bands receivable
Intermediate Frequency
VIF Carrier 38.0MHz
SIF Carrier 33.5MHz(4.5MHz), 32.5MHz(5.5MHz), 32.0MHz(6.0MHz), 31.5MHz(6.5MHz)
Colour Sub Carrier Frequency
PAL 4.43MHz
SECAM 4.40625MHz, 4.25MHz
NTSC 3.58MHz / 4.43MHz
Power Input AC 220V～240V , 50/60Hz
Power Consumption 193W(Max) / 137W(Avg)
Picture Tube Visible size : 68cm measured diagonally
High Voltage 32.0kV±1.5kV (at zero beam current)
Speaker & Audio Output Open dome speaker
10W+10W, 10cm round×2
Video Audio Input terminals
S-Video Y : 1V(p-p) positive (Negative sync provided, when terminated with 75Ω)
C : 0.286V(p-p) (Burst signal, when terminated with 75Ω)
Video 1V(p-p) 75Ω(RCA pin jack)
Video1
Audio(L/R) 500mV(rms) (-4dBs), High impedance (RCA pin jack)
Video 1V(p-p) 75Ω(RCA pin jack) Video2
Audio(L/R) 500mV(rms) (-4dBs), High Impedance (RCA pin jack)
Video/Y V : Composite video 1V(p-p) 75Ω(RCA pin jack)
Y : Component video 1V(p-p) 75Ω(RCA pin jack)
Cb Component video B-Y 0.7V(p-p) 75Ω(RCA pin jack)
Cr Component video R-Y 0.7V(p-p) 75Ω(RCA pin jack)
Video3
Audio(L/R) 500mV(rms) (-4dBs), High Impedance (RCA pin jack)
S-Video Y : 1V(p-p) positive (Negative sync provided, when terminated with 75Ω)
C : 0.286V(p-p) (Burst signal, when terminated with 75Ω)
Video 1V(p-p) 75Ω(RCA pin jack)
Video4
(
Front terminal
)
Audio(L/R) 500mV(rms) (-4dBs), High impedance (RCA pin jack)
Video Audio Output terminal
Video 1V(p-p) 75Ω(RCA pin jack)
Audio(L/R) 500mV(rms) (-4dBs), High Impedance (RCA pin jack)
Aerial Input Term 75Ωunbalanced, Coaxial
Headphone jack Stereo mini jack (φ3.5mm )
AV Compu Link terminal AV Compu LinkⅡ, mini jack (φ3.5mm )
Remote Control Unit RM-C115 (AAA/R06 dry battery×2)
Design & specifications are subject to change without notice.

No.51754
A
V-29RF6
3
SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. For
continued protection, no changes should be made to the original
design unless authorized in writing by the manufacturer.
Replacement parts must be identical to those used in the original
circuits. Service should be performed by qualified personnel
only.
2. Alterations of the design or circuitry of the products should not be
made. Any design alterations or additions will void the
manufacturer's warranty and will further relieve the manufacturer
of responsibility for personal injury or property damage resulting
therefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Replacement
parts which have these special safety characteristics are
identified in the parts list of Service manual. Electrical
components having such features are identified by shading
on the schematics and by (!
!!
!) on the parts list in Service
manual. The use of a substitute replacement which does not
have the same safety characteristics as the recommended
replacement part shown in the parts list of Service manual may
cause shock, fire, or other hazards.
4. Don't short between the LIVE side ground and ISOLATED
(NEUTRAL) side ground or EARTH side ground when
repairing.
Some model's power circuit is partly different in the GND. The
difference of the GND is shown by the LIVE : (") side GND, the
ISOLATED(NEUTRAL) : (#) side GND and EARTH : ($) side
GND. Don't short between the LIVE side GND and
ISOLATED(NEUTRAL) side GND or EARTH side GND and
never measure with a measuring apparatus (oscilloscope etc.)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the same time.
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 conform with
that specified in Service manual. Excessive high voltage can
cause an increase in X-Ray emission, arcing and possible
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect installation, cracked or melted high voltage harness,
poor soldering, etc.). To maintain the proper minimum level of
soft X-Ray emission, components in the high voltage circuitry
including the picture tube must be the exact replacements or
alternatives approved by the manufacturer of the complete
product.
7. Do not check high voltage by drawing an arc. Use a high voltage
meter or a high voltage probe with a VTVM. Discharge the
picture tube before attempting meter connection, by connecting
a clip lead to the ground frame and connecting the other end of
the lead through a 10k!2W resistor to the anode button.
8. When service is required, observe the original lead dress. Extra
precaution should be given to assure correct lead dress in the
high voltage circuit area. Where a short circuit has occurred,
those components that indicate evidence of overheating should
be replaced. Always use the manufacturer's replacement
components.
9. Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an isolation
check on the exposed metal parts of the cabinet (antenna
terminals, video/audio input and output terminals, Control knobs,
metal cabinet, screw"heads, earphone jack, control shafts, etc.)
to be sure the product is safe to operate without danger of
electrical shock.
(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 voltage of 1100V AC (r.m.s.) to an appliance
rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated
200V or more, for a period of one second.)
This method of test requires a test equipment not generally found
in the service trade.
(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 1500!10W resistor paralleled by a 0.15#F
AC-type capacitor between an exposed metal part and a known
good earth ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the resistor
connection to each exposed metal part, particularly any exposed
metal part having a return path to the chassis, and measure the
AC voltage across the resistor. Now, reverse the plug in the AC
outlet and repeat each measurement. Any voltage measured
must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA
AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC (r.m.s.).
This corresponds to 0.2mA AC (r.m.s.).
0.15
μ
F AC-TYPE
1500
!
10W
GOOD EARTH GROUND
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
AC VOLTMETER
(HAVING 1000
!
/V,
OR MORE SENSITIVITY)

No.51754
A
V-29RF6
4
FEATURES
"By preference, users can select the picture size from REGULAR,
ZOOM, 16:9 modes.
"Because this TV unit corresponds to multiplex broadcast, users
can enjoy music programs and sporting events with live realism.
In addition, BILINGUAL programs can be heard in their original
language.
"Users can make fun to connect the Digital Video Disk player by
using the component video signal input terminal.
"Built-in ECO (ECONOMY, ECOLOGY) MODE.
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.
"I
2C Bus controls the many ICs which have various functions each
other.
I2C BUS CONTROL SYSTEM CHART
IC1701
MICRO
COMPUTER
IC1701
MICRO
COMPUTER
IC1301
VIDEO
CHROMA
IC1301
VIDEO
CHROMA IC1501
DEF CTRL
IC1501
DEF CTRL IC1201
SRT
IC1201
SRT IC8801
LED CTRL
IC8801
LED CTRL
IC301 [0S]
DIGI COMB
IC301 [0S]
DIGI COMB IC101 [0S]
AV SW
IC101 [0S]
AV SW
IC1702
MEMORY
IC1702
MEMORY
SCL2 / SDA2
SCL3 / SDA3
TU1001
TUNER
TU1001
TUNER
SCL1 / SDA1

No. 51754
A
V-29RF6
5
FUNCTIONS
①Headphone jack ⑥TV/VIDEO ⑪POWER
②Video-4 terminal ⑦AUTO VNR ⑫ECO sensor
③MENU OK ⑧ECO ⑬Remote control sensor
④Channel -/+ (MENUUP/DOWN) ⑨ON TIMER ⑭Main POWER SW
⑤Volume -/+ (MENULEFT/RIGHT) ⑩BBE ⑮Dancing LED
①Video-1 terminal (S,V,L,R)
②Video-2 terminal (V,L,R)
③Video-3 terminal (V/Y,Cb,Cr,L,R)
④Output terminal (V,L,R)
⑤AV COMPULINK terminal
⑥Aerial socket
①POWER
②SPATIALIZER
③COLOUR BOTTOMS
④TV/VIDEO
⑤DISPLAY
⑥ZOOM
⑦FUNCTION UP/DOWN
⑧FUNCTION －/＋
⑨OK
⑩AUTO VNR
⑪SUPER DETAIL
⑫COLOUR SYSTEM
⑬SOUND SYSTEM
⑭CHANNEL
⑮CHANNEL SCAN
⑯CHANNEL ＋/－
⑰VOLUME ＋/－
⑱MUTING
⑲DVD CONTROL

No.51754
A
V-29RF6
6
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1.Disconnect the power plug from wall outlet.
2.As shown in the Fig.2, remove the 16 screws marked A
AA
A.
3.Withdraw the rear cover toward you.
REMOVING THE CHASSIS
"After removing the rear cover.
1.Slightly raise the both sides of the chassis by hand and remove the
two claws under the both sides of the chassis from the front
cabinet.
2.Withdraw the chassis backward.
(If necessary, take off the wire clamp, connectors etc.)
REMOVING THE AV TERMINAL BOARD
"After removing the rear cover.
1.As shown in Fig.2, remove the 5screws marked B
BB
B.
2.Then remove the AV TERMINAL BOARD.
REMOVING THE SPEAKER BOX
"After removing the rear cover.
1.As shown in Fig. 2, removing the 2screws marked C
CC
C,then
remove the speaker box.
2.Follow the same steps when removing the other hand speaker
box.
NOTE : When removing the screws marked C
CC
Cof the speaker box,
remove the lower side screw first, and then remove the
upper one.
REMOVING THE CONTROL BASE
"After removing the chassis.
1.As shown in Fig.1, while pushing down the claws marked E
EE
E
remove the CONTROL BASE in the arrow direction F
FF
F.
CHECKING THE PW BOARD
To check the PW Board from back side.
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 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 PW board.
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.
F
FF
F
E
EE
E
CONTROL BASE
CHASSIS
Fig. 1
CLAW
,

No.51754
A
V-29RF6
7
Fig.1
SPEAKER BOX
FRONT CABINET
CRT
CRT SOCKET PWB
FRONT CONTROL
PWB(1/2)
FRONT CONTROL
PWB
(
2/2
)
MAIN PWB
CLAW
CLAW
HVT
CHASSIS
BASE
AV TERMINAL
BOARD
POWER CORD
REAR COVER
AV SEL. PWB
SPEAKER BOX
Fig.2
POWER
DEF PWB
C
B
C
A

No. 51754
A
V-29RF6
8
REMOVING THE CRT
"Replacement of the CRT should be performed by 2 or more
persons.
"After removing the 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.3.
3. Remove 4 screws marked by arrows with a box type screw driver
as shown in Fig.4.
"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.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 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 stick to
the anode button. (Fig.7)
Silicon grease product No. KS - 650N
CRT CHANGE TABLE
CLOTH
A
PPROX.
35cm
CRT
CRT
CHANGE
TABLE BOX
TYPE
SCREW
DRIVER
Fig. 3
Fig. 6 Fig. 7
A
pprox.
20mm (Do not
coat grease on
this section
Silicon grease
should be coated
by 5mm or more
from the outside
diameter of
anode cap.
A
node button
(No sticking of
silicon grease) Coating position
of silicon grease
A
node cap
A
node button
CRT
Silicon grease
coating
Fig. 5
CRT
CABINET CRT
CHANGE TABLE
Fig. 4

No. 51754
A
V-29RF6
9
REPLACEMENT OF MEMORY ICs
1. Memory ICs
This model uses memory ICs. This memory IC data are for proper
operation of the video and deflection circuits. When replacing, be sure to
use ICs written with the initial values of data.
2. Procedure for replacing memory ICs
(1) Power off
Switch off the power and disconnect the power plug from the wall outlet.
(2) Replace the memory IC
Be sure to use memory ICs written with the initial data values.
(3) Power on
Connect the power plug into the wall outlet and switch power on.
(4) Check and set SYSTEM CONSTANT SET
It must not adjust without signal.
1) Press the
DISPLAY key and the PICTURE MODE key of the REMOTE
CONTROL UNIT simultaneously.
2) The SERVICE MENU screen of Fig. 1 will be displayed.
3) While the SERVICE MENU is displayed, again press the DISPLAY key and
PICTURE MODE key simultaneously, and the SYSTEM CONSTANT SET
screen of Fig. 2 will be displayed.
4) Check the setting values of the SYSTEM CONSTANT SET of Table 1 in page
later. If the value is different, select the setting item with the MENU UP/DOWN
key, and set the correct value with the MENU LEFT/RIGHT key.
5) Press the
OK key to memorize the setting value.
6) Press the
DISPLAY key twice, and return to the normal screen.
(5) Receive channel setting
Refer to the OPERATING INSTRUCTIONS, and set the receive channels as
described.
(6) User settings
Check the user setting items according to Table 2. Where these do not agree, refer
to the OPERATING INSTRUCTIONS.
(7) SERVICE MENU setting
Verify what to see in the SERVICE MENU, and set what ever in necessary.
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. WB PRESET
7. AUTO PROGRAM (OFF)
1-7 : SELECT DISP : EXIT
SERVICE MENU
JVC JK ASIA V**
M*******-*****
SYSTEM CONSTANT SET
COLOUR : MULTI
MSP : YES
SUPPER BASS : NO
CENTER SPEAKER : NO
TEXT : NO
OK : STORE DISP : EXIT
MODEL = JK_ASIA (V*
**
*．***
******
***
)
SYSTEM CONSTANT(1/3)
SYSTEM CONSTANT SET
BLUE BACK MUTE : NO
VOLUME LIMIT : YES
COLOUR AUTO : YES
TILT : YES
C-TRAP : 0
OK : STORE DISP : EXIT
MODEL = JK_ASIA (V*
**
*．***
******
***
)
SYSTEM CONSTANT
(
2/3
)
Fig.2
Fig.1
OK
SYSTEM CONSTANT SET
E.M.C : NO
N/S WHITE BACK : NO
7 LED SPEED : 100
OK : STORE DISP : EXIT
MODEL = JK_ASIA (V*
**
*．***
******
***
)
SYSTEM CONSTANT(3/3)
MENU
UP/DOWN
MENU
LEFT/RIGHT
DISPLAY
PICTURE
MODE

No. 51754
A
V-29RF6
10
INITIAL SETTING VALUES OF SYSTEM CONSTANT SET (TABLE 1)
CONTENTS VARIABLE RANGE INITIAL SETTING VALUE
COLOUR MULTI
MSP YES
SUPER BASS NO
CENTER SPEAKER NO
TEXT NO
BLUE BACK MUTE NO
VOLUME LIMIT YES
COLOUR AUTO YES
TILT YES
C-TRAP 0
E.M.C NO
N/S WHITE BACK NO
7 LED SPEED 100
USER SETTING CONDITIONS (TABLE2)
PICTUIRE SETTING FEATURES
PICTURE MODE
CONTRAST
BRIGHT
SHARP
COLOUR
WHITE BALANCE
BRIGHT
CENTER
COOL
PICTURE FEATURES
SLEEP TIMER
ON TIMER
BLUE BACK
CHILD LOCK
CHANNEL GUARD
AUTO SHUT OFF
VIDEO-3 SETTING
OFF
PR 1 0:00
ON
OFF
OFF
COMPONENT
INSTALL
LANGUAGE
AUTO PROGRAM
EDIT / MANUAL
ENGLISH
PRESET CH only
Others : blank
DEMO
A.A.C
AUTO VNR
COLOUR SYSTEM
ZOOM
ECO SENSER
PICTURE TILT
OFF
AUTO
AUTO
REGULAR
OFF
CENTER DEMO OFF
SOUND SETTING
STEREO / Ⅰ・Ⅱ
BASS
TREBLE
BALANCE
AI VOLUME
BBE
SPATIALIZER
CENTER
ON
ON
OFF
MULTI TRIPLE PAL
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
1 0
YES NO
00 10 20 1250 1260 1270
……
YES NO

No. 51754
A
V-29RF6
11
SERVICE MENU SETING ITEMS (TABLE 3)
Setting item Setting value Setting item Setting value
1. IF VCO (CW) 4. DEF 1. V-SHIFT
2. V-SIZE
3. SUBTITLE
4. H-CENT
5. H-SIZE
6. EW-PIN
7. TRAPEZ
8. EW. COR. L
9. EW. COR. H
10. V. S-COR
11. V-LIN
12. H-BLK-R
13. H-BLK-L
14. V-EHT
15. H-EHT
16. EHT-GAIN
2. V / C 1. CUT OFF (R, G, B)
2. DRIVE ( R, B)
3. BRIGHT
4. CONT.
5. COLOUR
6. TINT
7. BLACK OFFSET (R-Y, B-Y)
8. SHARP
5. VSM PRESET
BRIGHT
STANDARD
SOFT
1. BRIGHT
2. CONT
3. COLOUR
4. SHARP
5. TINT
6. WB PRESET
COOL
MID
WARM
1. R DRIVE
2. B DRIVE
3. AUDIO
(Do not adjust) 1. ERROR LIMIT
2. A2 ID THR
3. BASS
4. TREBLE
7. AUTO PROGRAM
(Do not adjust) ON / OFF

No.51754
A
V-29RF6
12
REPLACEMENT OF CHIP COMPONENT
!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.
!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.
!REPLACEMENT STEPS
1. How to remove Chip parts
#
##
#Resistors, capacitors, etc
(1) As shown in the figure, push the part with tweezers and
alternately melt the solder at each end.
(2) Shift with tweezers and remove the chip part.
#
##
#Transistors, diodes, variable resistors, etc
(1) Apply extra solder to each lead.
(2) As shown in the figure, push the part with tweezers and
alternately melt the solder at each lead. Shift and remove the
chip part.
Note : After removing the part, remove remaining solder from the
pattern.
2. How to install Chip parts
#
##
#Resistors, capacitors, etc
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the solder.
Then heat and melt the solder at both ends of the chip part.
#
##
#Transistors, diodes, variable resistors, etc
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the solder.
(3) First solder lead Aas indicated in the figure.
(4) Then solder leads
Band C.
SOLDER SOLDER
AB
C
A
B
C

No. 51754
A
V-29RF6
13
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
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 with the REMOTE CONTROL UNIT is made
on the basis of the initial setting values. The setting values
which adjust the screen to its optimum condition may differ
from the initial setting values.
3. Make sure that connection is correctly made to AC power
source.
4. Turn on the power of the set and 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, transforms, condensers,
etc.
7. Preparation for adjustment (presetting)
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
User mode setting condition
PICTURE MODE (VSM) STANDARD
WHITE BALANCE COOL
ZOOM REGULAR
CONTRAST CENTER
BRIGHT CENTER
SHARP CENTER
COLOUR CENTER
A.A.C OFF
AUTO VNR OFF
PICTURE TILT CENTER
BLUE BACK OFF
AUTO SHUTOFF OFF
ECO SENSOR OFF
AI VOLUME OFF
BBE OFF
SLEEP TIMER OFF
BALANCE CENTER
SPATIALIZER OFF
MEASURING INSTRUMENT AND FIXTURES
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [PAL / SECAM / NTSC]
4. Remote control unit
ADJUSTMENT CONTENTS
●CHECK ITEMS BEFORE ADJUSTMENT
●FOCUS ADJUSTMENT
●CHECK OF IF CIRCUIT
●SETTING OF VSM PRESET
●SETTING OF WHITE BALANCE PRESET
●VIDEO / CHROMA CIRCUIT ADJUSTMENT
●DEFLECTION CIRCUIT ADJUSTMENT
●AUDIO CIRCUIT ADJUSTMENT [Do not adjust]
●PURITY, CONVERGENCE ADJUSTMENT

No. 51754
A
V-29RF6
14
BASIC OPERATION OF SERVICE MENU
1. The adjustment using SERVICE MENU
The following adjustment items use the SERVICE MENU in the series of the adjustment. The adjustments are made on the basis of the
initial setting values. The adjustment values which adjust the screen to the optimum condition can be different from the initial setting values.
With the SERVICE NEMU, various settings can be made, and they are broadly classified in the following items of settings.
IF ･････････････････････････ Adjustment of the IF circuits.
V/C ･･･････････････････････ Adjustment of the VIDEO/CHROMA circuit.
AUDIO ････････････････････ Adjustment of the sound circuit [Do not adjust].
DEF･･･････････････････････ Adjustment of the DEFLECTION circuit for each aspect mode given below
REGULAR (50/60Hz)
ZOOM (50/60Hz)
16:9 (50/60Hz)
VSM PRESET ･･････････････ Adjustment of the initial setting values of VSM condition as BRIGHT, STANDARD and SOFT.
(VSM : Video Status Memory)
WB PRESET ･･･････････････ Adjustment of the initial setting value of WHITE BALANCE PRESET values as COOL, MID and WARM.
AUTO PROGRAM･･･････････ By turning the power switch on, you can get the state of AUTO PROGRAM [Do not adjust].
2. Key operation of the SERVICE MENU
[Enter to SERVICE MENU]
Press the DISPLAY key and the PICTURE MODE key of the REMOTE CONTROL
UNIT simultaneously. Then enter the SERVICE MENU mode as shown in Fig.1.
[Exit from SERVICE MENU]
When complete the adjustment work, press the DISPLAY key to return to the main
SERVICE MENU. And then press the DISPLAY key again, return to the normal
screen.
[Select the SUB MENU from MAIN MENU]
In main SERVICE MENU, press the 1～7 key of the remote control unit, to select any
of the adjustment items.
The colours which selected item characters are changed.
[Method of setting]
1. IF
[VCO]
①1 Key ･･････････ Select 1.IF.
②The VCO (CW) screen will be displayed.
③DISPLAY Key ･･･ As you press this key, you will return to the SERVICE MENU.
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. WB PRESET
7. AUTO PROGRAM (OFF)
1-7 : SELECT DISP : EXIT
SERVICE MENU
JVC JK ASIA V**
****
**
M*******
**************
*******-*****
**********
*****
Fig.1
SUB MENU 1.IF(VCO)
VCO (CW)
**
****
**.**
****
** MHz : CH**
****
**
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
DISP : EXIT
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
PICTURE
MODE
MENU
UP/DOWN MENU
LEFT/RIGHT
DISPLAY
Ten key
OK

No. 51754
A
V-29RF6
15
2.V/C, 4.DEF, 5.VSM PRESET and 6.WB PRESET
①2, 4, 5, 6 Key ･･････････････････ Select one from 2. V/C, 4. DEF, 5. VSM PRESET and 6.WB PRESET.
②MENU UP/DOWN Key ･･････････ Select setting items.
③MENU LEFT/RIGHT････････････ Set (adjust) the setting values of the setting items.
④OK Key･･･････････････････････ Memorize the setting value.
(Before storing the setting values in memory, do not press the CH, TV, POWER ON / OFF key -
if you do, the values will not be stored in memory.)
⑤DISPLAY Key ･････････････････ Return to the SERVICE MENU screen.
3.AUDIO and 7.AUTO PROGRAM
3.AUDIO (Do not adjust) ･････････････････ It is no requirement to adjustment.
7.AUTO PROGRAM (Do not adjust)････････ AUTO PROGRAM contents displays on the screen. Need not for service.
SUB MENU 2.V/C
V/C PAL COOL
1. CUT OFF (R) - **
****
**
(G) - **
****
**
(B) - **
****
**
OK : STORE DISP : EXIT
SUB MENU 4.DEF
DEF REGULER 50Hz
1. V-SHIFT ***
******
***
(
((
(**
****
**)
))
)
OK : STORE DISP : EXIT
SUB MENU 5.VSM PRESET
VSM PRESET STANDARD
1.BRIGHT ***
******
***
OK : STORE DISP : EXIT
SUB MENU 6.WB PRESET
WB PRESET COOL
1.R DRIVE ***
******
***
OK : STORE DISP : EXIT
SUB MENU 3.AUDIO
AUDIO
1. ERROR LIMIT ***
******
***H
C_AD_BITS = 00000000
NICAM ERROR ****
********
****
OK : STORE DISP : EXIT

No. 51754
A
V-29RF6
16
SERVICE MENU FLOW CHART
SUB MENU 5. VSM PRESET SUB MENU 2. V/C
SUB MENU 3. AUDIO (Do not adjust)
SUB MENU 4. DEF
SUB MENU 1.IF (VCO)
1. BRIGHT
2. CONT.
3. COLOUR
4. SHARP
5. TINT
BRIGHT
STANDARD
SOFT
1. CUT OFF
2. DRIVE
3. BRIGHT
4. CONT.
5. COLOUR
6. HUE
7. BLACK OFFSET
8. SHARP
1. ERROR LIMIT
2. A2 ID THR
4. BASS
5. TREBLE
1. V-SHIFT
2. V-SIZE
3. SUBTITLE
4. H-CENT
5. H-SIZE
6. EW-PIN
7. TRAPEZ
8. EW.COR.L
9. EW.COR.H
10. V.S-COR
11. V-LIN
12. H-BLK-R
13. H-BLK-L
14. V-EHT
15. H-EHT
16. EHT-GAIN
SUB MENU 6. WB PRESET
1. R DRIVE
2. B DRIVE
COOL
MID
WARM
7.AUTO PROGRAM (OFF)
ON/OFF
TOGGLE SWITCH
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. WB PRESET
7. AUTO PROGRAM (OFF)
1-7 : SELECT DISP : EXIT
SERVICE MENU
JVC JK ASIA V**
M*******-*****
VCO (CW)
**.**
**.****.**
**.** MHz : CH **
****
**
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
DISP : EXIT
V/C PAL COOL
1. CUT OFF (R) - **
****
**
(G) - **
****
**
(B) - **
****
**
OK : STORE DISP : EXIT
VSM PRESET STANDARD
1.BRIGHT ***
******
***
OK : STORE DISP : EXIT
AUDIO
1. ERROR LIMIT ***
******
***H
C_AD_BITS = 00000000
NICAM ERROR ****
********
****
WB PRESET COOL
1.R DRIVE ***
******
***
DEF REGULER 50Hz
1. V-SHIFT ***
******
***
(
((
(**
****
**)
))
)
OK : STORE DISP : EXIT
OK : STORE DISP : EXITOK : STORE DISP : EXIT