JVC HV-32D25EUW User manual

SERVICE MANUAL
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD. No.52068
2002/12
HV-32D25EUW
HV-32D25EJW
COLOUR TELEVISION
52068200212 HV-32D25EUW
HV-32D25EJW
CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SERVICE ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
BASIC CHASSIS
MK

HV-32D25EUW
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SPECIFICATION
Item Content
HV-32D25EUW HV-32D25EJW
Dimensions (W x H x D) 94.6cm x 56.2cm x 55.1cm
Mass 58.0kg
TV RF System CCIR B/G, I, D/K, L/L’
Colour System PAL / SECAM / NTSC
*The EXT terminals also support the NTSC 3.58MHz/4.43MHz system.
Stereo System A2 (B/G, D/K) / NICAM (B/G, I, D/K, L)
Teletext System FLOF(Fastext), TOP, WST(World Standard system)
Receiving Frequency VHF
UHF
CATV
47MHz ~ 470MHz
470MHz ~ 862MHz
116MHz ~ 172MHz / 220MHz ~ 469MHz
47MHz ~ 470MHz (IRELAND only)
470MHz ~ 862MHz
-
-
Intermediate Frequency VIF
SIF 38.9MHz(B/G, D/K, I) / 33.95MHz(L’) 33.4MHz(5.5MHz:B/G) / 32.9MHz(6.0MHz:I) / 32.4MHz(6.5MHz:L,D/K) /
40.45MHz(6.5MHz:L’)
Colour Sub Carrier
Frequency PAL SECAM
NTSC
4.43MHz
4.40625MHz / 4.25MHz
3.58MHz / 4.43MHz
Power Input AC 220V~AC240V, 50Hz
Power Consumption Max 300W / Avg. 160W
Aerial Input 75 ohm unbalanced, coaxial
Picture Tube Visible size 76 cm(measured diagonally) Aspect ratio 16:9
High Voltage 31.0kV 0.2kV (At beam current : 0uA )
Speaker MAIN
CENTER
WOOFER
10W + 10W, 13 cm x 6.5 cm oval x2
7.5W, 16 cm x 4 cm oval x 1
18W, 13 cm round x 1
EXT-1 (Input/Output) 21 pin Euro connector (SCART socket)
• Video input, Audio L/R inputs and RGB inputs are available.
• TV broadcast outputs (Video and Audio L/R) are available.
EXT-2 (Input/Output) 21 pin Euro connector (SCART socket)
• Video input, S-Video (Y/C) input, Audio L/R inputs and RGB inputs are available.
• Video and Audio L/R outputs are available.
• T-V LINK functions are available.
EXT-3 (Input/Output) 21 pin Euro connector (SCART socket)
• Video input, S-Video (Y/C) input and Audio L/R inputs are available.
EXT-4 (Input) Component
video RCA pin jack x 3 Y : 1V(p-p), 75 ohm
Pb / B-Y: 0.7V(p-p), 75 ohm
Pr / R-Y : 0.7V(p-p), 75 ohm
Progressive-scanning signals(626p or 525p) are available
Audio (L/R) 500mv(rms) (-4dBs), High Impedance RCA pin jack x 2
EXT-5 (Input) Video 1V(p-p), 75 ohm RCA pin jack x 1
Audio (L/R) 500mv(rms) (-4dBs), High Impedance RCA pin jack x 2
S-Video Mini DIN 4-pin
Y : 1V(p-p) Positive (Negative sync provided), 75 ohm
C : 0.286V(p-p) (burst signal), 75 ohm
DIGITAL AUDIO INPUT OPTICAL x 1
COAXIAL x 1 (Dolby Digital is available.)
AUDIO OUT (Variable) 0~1V(rms), Low Impedance RCA pin jack x 3
SURROUND REAR OUT 7.5W + 7.5W, 8 ohm (push terminal)
Headphone jack Stereo mini jack (Ø3.5mm)
Remote Control Unit RM-C61 (AAA/R03 Dry cell battery x 2) : HV-32D25EUW
RM-C62 (AAA/R03 Dry cell battery x 2) : HV-32D25EJW
Design & specifications are subject to change without notice.
Manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol ( )are trademarks of Dolby Laboratories Licensing Corporation.

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21-pin Euro connector (SCART) : EXT-1/EXT-2/EXT-3
(P-P= Peak to Peak, B-W= Blanking to white peak)
PinNo. Signal Designation Matching Value EXT-1 EXT-2 EXT-3
1 AUDIO R output 500mV(rms) (Nominal),
Low impedance Used (TV OUT) Used (LINE OUT) NC
2 AUDIO R input 500mV(rms) (Nominal),
High impedance Used Used Used
3 AUDIO L output 500mV(rms) (Nominal),
Low impedance Used (TV OUT) Used (LINE OUT) Not used
4 AUDIO GND Used Used Used
5 GND (B) Used Used Used
6 AUDIO L input 500mV(rms) (Nominal),
High impedance Used Used Used
7 B input 700mV(B-W), 75 ohm Used Used Not used
8 FUNCTION SW
(SLOW SW) Low : 0V-3V, High : 8V-12V, High impedance Used Used Used
9 GND (G) Used Used Used
10 SCL Not used Used (SCL2) Used (SCL3)
11 G input 700mV(B-W), 75 ohm Used Used Not used
12 SDA Not used Used(SDA2) Used(SDA3)
13 GND (R) Used Used Used
14 GND (YS) Used Not used Not used
15 R / C input R : 700mV(B-W), 75 ohm
C : 300mV(P-P), 75 ohm Used (R) Used (C2/R) Used (C3)
16 Ys input
(FAST SW) Low : 0V-0.4V, High : 1V-3V, 75 ohm Used Used Not used
17 GND (VIDEO output) Used Used Used
18 GND (VIDEO input) Used Used Used
19 VIDEO output 1V(P-P) (Negative going sync),
75 ohm Used (TV OUT) Used (LINE OUT) Not used
20 VIDEO / Y input 1V(P-P) (Negative going sync),
75 ohm Used Used Used
21 COMMON GND Used Used Used
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
[Pin assignment]

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SECTION 1
SAFETY PRECAUTIONS
1.1 HV-32D25EUW
(1) The design of this product contains special hardware,
many circuits and components specially for safety purpos-
es. 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 per-
formed 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 prop-
erty damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteris-
tics are often not evident fromvisual 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 Ser-
vice manual. Electrical components having such fea-
tures 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 ISO-
LATED (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 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 recom-
mended 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 volt-
age 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 min-
imum, or should be prevented. If severe arcing occurs, re-
move the AC power immediately and determine the cause
by visual inspection (incorrect installation, cracked or melt-
ed high voltage harness, poor soldering, etc.). To maintain
the proper minimum level of soft X-Ray emission, compo-
nents 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. Dis-
charge the picture tube before attempting meter connec-
tion, 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 isola-
tion check on the exposed metal parts of the cabinet (an-
tenna 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 3000V AC (r.m.s.) for a period of one second.
(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an ap-
pliance rated up to 120V, and 3000V AC (r.m.s.) to an ap-
pliance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not general-
ly 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 chas-
sis, 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 sen-
sitivity in the following manner. Connect a 1500 ohm
10W resistor paralleled by a 0.15µF AC-type capacitor
between an exposed metal part and a known good earth
ground(water pipe,etc.). MeasuretheAC voltageacross
the resistor with the AC voltmeter. Move the resistor con-
nection to each exposed metal part, particularly any ex-
posed metal part having a return path to the chassis, and
measure the AC voltage across the resistor. Now, re-
verse the plug in the AC outlet and repeat each measure-
ment. 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 1000Ω/V,
OR MORE SENSITIVITY)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500Ω10W
0.15uF AC-TYPE
GOOD EARTH GROUND

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1.2 HV-32D25EJW [UK VERSION]
(1) The design of this product contains special hardware and 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. Re-
placement 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 product should not be made. Any design alterations or additions will void the manu-
facturer'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 product have special safety-related characteristics. These characteristics are often
not evident from visual inspection nor can the protection afforded by them necessary be obtained by using replacement com-
ponents 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 the 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) The leads in the products are routed and dressed with ties, clamps, tubing’s, barriers and the like to be separated from live
parts, high temperature parts, moving parts and / or sharp edges for the prevention of electric shock and fire hazard. When
service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been
returned to normal, after re-assembling.
WARNING
(1) The equipment has been designed and manufactured to meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant safety standards.
(4) It is essential that safety critical components are replaced by approved parts.
(5) If mains voltage selector is provided, check setting for local voltage.

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SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 MAIN DIFFERENCE LIST
2.1.1 FEATURES
• DIST (Digital Image Scaling Technology) employs an interpolation method that doubles the scanning lines to realize 1250-line
flicker-free picture making it especially suitable for reproducing high-resolution pictures even on large-screen displays.
• New chassis design enables use of an interactive on-screen control.
• Pure flat CRT produces fine textured picture in every detail.
• With AUDIO/VIDEO/COMPONENT input terminals.
•I
2 C bus control utilizes single chip ICs.
• By means of AUTO PROGRAM, the TV stations can be selected automatically and the TV channels can also be rearranged
automatically.
ITEM HV-32D25EUW HV-32D25EJW
POWER CORD QMPK160-185-JC QMPN130-185-JC
REMOTE CONTROL UNIT RM-C61-1C RM-C62-1C
INST BOOK LCT1272-001A-U LCT1273-001A-U
LCT1274-001A-U LCT1271-001A-U
RATING LABEL LC11548-003A-U LC11364-018A-U
EURO LABEL AEM1064-034-E AEM1064-035-E

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2.2 SYSTEM BLOCK
DOLBY PWBAV SW PWB
IC004
MEMORY
IC001
MICRO COMPUTER
IC201
SYNC.SEP.
IC101
COMPONENT SW
IC301
RGB
PROCESSOR
TU001
MAIN
TUNER
IC101
AV SW
IC501
MULTISOUND
PROCESSOR
TU002
SUB TUNER
IC601
TONE/VOL
(MAIN L/R)
IC651
TONE/VOL
(SUB L/R)
IC631
TONE/VOL
(CENTRE/WOOFER)
IC003
A-D CONVERT
IC101
DIST
IC201
DIGITAL
ENHANCER
SDA 0
SCL 0
SDA 2
SCL 2 SDA 1 SCL 1
SDA 3
SCL 3 SDA 3 SCL 3
MICOM
PWB
MAIN
PWB
DIST PWB

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2.3 FUNCTIONS
2.3.1 FRONT CONTROL & REAR (SIDE) TERMINAL
2.3.2 REAR TERMINAL
R
L
S
P
E
X
T
5
R
L
S
P
E
X
T
5
Refer to the pages in brackets for details.
Remote control sensor
Power lamp (GREEN : Operation, RED : Stand-by)
Main power button
Headphone jack (mini jack)
Channel up/down & Volume +/- buttons
Volume button
EXT-5 terminal
Woofer terminal
AUDIO OUT terminal
SURROUND REAR terminal
EXT-1 terminal
EXT-2 terminal
EXT-3 terminal
EXT-4 terminal
Aerial socket
DIGITAL AUDIO IN terminal

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2.3.3 REMOTE CONTROL UNIT
FREEZE
SUB-P
MULTI
Muting button
Number buttons
ZOOM button
3D sound button
Information button
TV button
buttons
Standby button
Colour buttons
OK button
buttons
VCR/DVD/Teletext control button
VCR DVD switch
(Text) button
PIP button
FREEZE button
SUB-P / button
SWAP button
MULTI button
Muting button
Number buttons
ZOOM button
3D sound button
Information button
TV button
buttons
Standby button
Colour buttons
OK button
buttons
VCR/DVD/Teletext control button
VCR DVD switch
(Text) button
PIP button
FREEZE button
SUB-P / button
button
button
FREEZE
SUB-P
123
456
78
0
9
123
456
78
0
9
RM-C62 : HV-32D25EJW RM-C61 : HV-32D25EUW

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2.4 DISASSEMBLY PROCEDURE
2.4.1 REMOVING THE SUB WOOFER UNIT & THE REAR
COVER
(1) Unplug the power cord.
(2) Remove the SUB WOOFER CORD from the TERMINAL
AV TERMINAL BOARD.
(3) Pull up the SUB WOOFER UNIT on the top of the REAR
COVER upward.
(4) Remove the 13 screws [A] as shown in the Fig. 1
(5) Withdraw the REAR COVER toward you.
2.4.2 REMOVING THE SIDE CONTROL JACK ASSEMBLY
*Remove the REAR COVER.
(1) Remove the 1 screw [B] as shown in the Fig.1.
(2) While slightly raise the SIDE CONTROL JACK ASSEMBLY,
remove the 2 claws under the SIDE CONTROL JACK
ASSEMBLY.
(3) Disconnect the connector F and CN8016 as shown in Fig.
2.
2.4.3 REMOVING THE SIDE CONTROL PWB
* Remove the REAR COVER.
* Remove the SIDE CONTROL ASSEMBLY.
(1) Remove the 3 claws [C] from back side of the SIDE
CONTROL JACK ASSEMBLY as shown in Fig. 2.
(2) Pull out the SIDE CONTROL PWB.
Fig.2
2.4.4 REMOVING THE MAIN CHASSIS
* Remove the REAR COVER.
(1) Slightly raise the both sides of the MAIN CHASSIS by
hand and remove the two claws under the both sides of
the MAIN CHASSIS from the front cabinet
(2) Withdraw the MAIN CHASSIS backward.
(If necessary, take off the wire clamp, connectors etc.)
2.4.5 REMOVING THE POWER & DEF. PWB
* Remove the MAIN CHASSIS.
(1) Remove the 3 screws [D] as shown in Fig. 1.
(2) Remove the POWER & DEF. PWB upper.
(If necessary, take off the wire clamp, connectors etc.)
2.4.6 REMOVING THE CENTER SPEAKER
* Remove the REAR COVER
* Remove the MAIN CHASSIS.
(1) Remove the 2 screws [E] as shown in Fig. 1.
(2) Remove the CENTER SPEAKER. If necessary, detach
the cables.
2.4.7 REMOVING THE SIDE SPEAKER
*Remove the REAR COVER
(1) Remove the 2 screws [F], and remove the speaker
adapter as shown in Fig. 1
NOTE:
When removing the 2 screws marked [F] of the speaker
adapter remove the lower side screw first, and then
remove the upper one
(2) Remove the 4 screws [G] attaching the SIDE SPEAKER.
(3) Follow the same steps when removing the other hand
speaker.
2.4.8 REMOVING THE AV TERMINAL BOARD
* Remove the REAR COVER.
(1) Remove the 8 screws [H] as shown in the Fig. 1.
(2) Remove the 3 claws [ I ] under the CHASSIS as shown in
Fig. 3
(3) Remove the AV TERMINAL BOARD slightly in the
direction of arrow [J] as shown in Fig. 3.
(4) After removing the 1 clow [K] on the connector for SUB
WOOFERS pull out the connector for SUB WOOFER.
(Fig. 4)
Fig.3
Fig.4
2.4.9 CHECKING THE PW BOARD
(1) Pull out the MAIN CHASSIS. (Refer to REMOVING THE
MAIN CHASSIS)
(2) Erect the MAIN CHASSIS vertically so that you can easily
check the back side of the PW board.
CAUTION:
• When erecting the MAIN 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.
2.4.10 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 Connector
CN8016 Connector
C
C
SIDE
CONTROL
PWB
(Back view)
J
I
I
AV
TERMINAL
BOARD
AV SW PWB
K
K
AV TERMINAL BOARD
SUB WOOFER
CORD
WOOFER
CORD
CONNECTOR for
SUB WOOFER

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Fig.1
CRT SO
FRONT CABINET
CKET
PWB
LINE FILTER PWB
POWER & DE
DEF OSC PWB
F. PWB
MAIN
CENTER
SPEAKER
PWB
(13)
H
A
AV SW
PWB
F
12
( 4)
(8)
B
DIST PWB
EHT PWB
MICOM
PWB
L
FRONT
CONTRO
PWB
DOLBY PWB
SUB WOOFER
REAR COVER
SIDE CONTROL JACK
ASSEMBLY
UNIT
G
( 3)
D
E
Fig. 2
( 2)
CLOW
CLOW
SIDE
SPEAKER
SPEAKER
ADAPTER
CHASSIS BASE
AV TERMINAL
BOARD
POWER
CORD
SUB WOOFER
CORD
Fig.4

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2.4.11 REMOVING THE CRT
Note:
• Replacement of the CRT should be performed by 2 or more
persons.
• After removing the REAR COVER, CHASSIS etc.,
(1) Putting the CRT change table on soft cloth, the CRT
change table should also be covered with such soft cloth
(shown in Fig. 5).
(2) While keeping the surface of CRT down, mount the TV set
on the CRT change table balanced will as shown in Fig. 6.
(3) Remove 4 screws marked by arrows with a box type
screwdriver as shown in Fig. 6.
Note:
Since the cabinet will drop when screws have been
removed, be sure to support the cabinet with hands.
(4) After 4 screws have been removed, put the cabinet slowly
on cloth (At this time, be carefully so as not to damage the
front
surface of the cabinet) shown in Fig. 7.
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.
Fig.5
Fig.6
Fig.7
CRT CHANGE TABLE
APPROX.
35cm
CLOTH
CRT
BOX
TYPE
SCREW
DRIVER
CRT
CHANGE
TABLE
CRT
CHANGE TABLE
CRT
CABINET
CAUTION
The woofer unit is mounted on the TV. Always move the TV and woofer unit together when removing the TV from the box, or when
moving the woofer unit.
If the TV is tilted during movement the woofer unit may fall. Be careful to keep the TV level when moving it.
Do not grip the woofer unit when moving the TV.
Do not place objects on the woofer unit duct.
LIFTING CAUTION
KEEP STAY UNIT
FREE WOOFER UNIT

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2.5 REPLACEMENT OF MEMORY ICs
2.5.1 MEMORY ICs
This TV use memory ICs. In the memory ICs, there are
memorized data for correctly operating the video and deflection
circuits. When replacing memory ICs, be sure to use ICs written
with the initial values of data
Fig.1
2.5.2 PROCEDURE FOR REPLACING MEMORY ICs
(1) Power off
Switch the power off and unplug the power cord from the
wall outlet
(2) Replace ICs.
Be sure to use memory ICs written with the initial data
values
(3) Power on
Plug the power cord into the wall outlet and switch the
power on.
(4) Setting of receive channels
Set the receive channel.
For setting, refer to the OPERATING INSTRUCTIONS.
(5) Setting of SERVICE MENU
a) Press the INFORMATION key and the MUTE key of
the REMOTE CONTROLUNIT simultaneously.
b) The SERVICE MENU screen of Fig. 1 will be
displayed.
c) When a desired number is selected, the following
menu will come up respectively.
Verify the setting items of the SERVICE MENU and reset
where necessary. for setting, refer to the SERVICE
ADJUSTMENTS.
(6) User settings
Check the user setting values of Table 1, and if setting
value is different, set the correct value.
For setting, refer to the OPERATING INSTRUCTIONS.
Fig.2
1. IF
3. AUDIO
5. VSM PRESET
7. VNR
2. V/C
6. STATUS
4. DEF
SERVICE MENU
SERVICE MENU
9. SHIPPING(OFF) 8. IP 0. BUS FREE
1-9 : SELECT i : EXIT
Names of key key
OK
INFORMATION
MUTING
OK
FUNCTION UP/DOWN
FONCTION -/+

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2.5.3 USER SETTING VALUES (SHIPPING VALUES)
Table 1
Setting item Setting value Setting item Setting value
MAIN POWER SW OFF PICTURE SETTING
SHIPPING CHANNEL PR1 PICTURE MODE BRIGHT
PRESET CHANNEL See ; OPERATING
INSTRUCTIONS. COLOUR TEMP NORMAL
ZOOM MODE PANORAMIC TINT NORMAL
SUB POWER ON
DISPLAY INDICATED INSTALL
SOUND LEVEL 10 LANGUAGE ENGLISH
EDIT PRESET CHANNEL ONLY
OTHER : NON (SPACE)
PICTURE FEATURES
DIGITAL VNR AUTO SOUND
DIGIPURE PRO AUTO BASS CENTRE
COLOUR SYSTEM TV : Depends on PR/CH
EXT : AUTO TREBLE CENTRE
BALANCE CENTRE
PICTURE TILT CENTRE DIGITAL SURROUND SURROUD OFF
N/S CANCEL CENTRE 3D PHONIC TV SPEAKER
SUB WOOFER
LEVEL
VOLUME
L/C/R
OFF
CENTRE
MAX
4: 3 AUTO ASPECT PANORAMIC
PIP POSITION Right below
HEAD PHONE VOLUME
TV SPEAKER
OUTPUT
20
OFF
MAIN
FEATURES
SLEEP TIMER OFF
BLUE BACK ON DOLBY DIGITALTV SPEAKER
REAR SPEAKER
SUB WOOFER
TEST TONE
LEFT
CENTRE
RIGHT
SURROUND
DELAY TIME
L/C/R
ON
OFF
OFF
MAX
MAX
MAX
MAX
0
CHILD LOCK ID NO
ALL CH 0000 OFF
DECODER (EXT-2) ALL CH: OFF
DUBBING EXT-1---->EXT-2
EXT SETTING ID
S-IN NON(SPACE) NON(SPACE)

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2.5.4 SERVICE MENU SETTING ITEMS
Table 2
Setting item Setting value Setting item Setting value
1.IF 1.VCO
2.ATT ON/OFF 6.STATUS (Do not adjust)
2. V/C 1.CUT OF R 12.TWN CONT
2.CUT OF G 13.COLOUR
3.CUT OF B 14.HUE
4.DRIVE R 15.BY GAIN
5.DRIVE G 16.TWN COL
6.DRIVE B 17.TWN TINT
7.TWN HI R 18.B OF MR
8.TWIN HI B 19.B OF MB
9.BRIGHT 20.B OF SR
10.CONT 21.B OF SB
11.TWN BRIG
7.VNR
(Do not adjust) 1.MYLV 10.MCCOR 2.ONMVF 11.CLTL
3.MYCOR 12.YNGA
4.MYGA 13.COR_OF
5.YEGON 14.LPF_OF
6.YEGL 15.YCTL
7.YLTL 17.YNCON
8.MCLV
9.MCGA
3.AUDIO
(Do not adjust) 1.ERR LIMIT 2.A2 ID THR
3.Q-PEAK SOUND SYSTEM
4.SOUND LEVEL
SOUND SYSTEM
8.IP
(Do not adjust) PPA001 - PPA008 PPB001 - PPB036
PPC001 - PPC007
ADS001 - ADS034
IPA001 - IPA120
IPB001 - IPB088
IPC001 - IPC044
IPD001 - IPD058
4.DEF 1.FREE-RUN 7.EW-PIN
2.V-SHIFT 8.COR-UP
3.V-SIZE 9.COR-LO
4.H-CENT 10.V.S-COR
5.H-SIZE 11.V-LIN
6.TRAPEZ
9.SHIPPING (Do not select under the adjustment)
5.VSM PRESET 1.CONT
2.BRIGHT
3.SHARP
4.COLOUR
5.HUE
6.WDR R
7.WDR G
8.WDR B

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2.6 REPLACEMENT OF CHIP COMPONENT
2.6.1 CAUTIONS
(1) Avoid heating for more than 3 seconds.
(2) Do not rub the electrodes and the resist parts of the pattern.
(3) When removing a chip part, melt the solder adequately.
(4) Do not reuse a chip part after removing it.
2.6.2 SOLDERING IRON
(1) Use a high insulation soldering iron with a thin pointed end of it.
(2) A 30w soldering iron is recommended for easily removing parts.
2.6.3 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 the 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

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SECTION 3
SERVICE ADJUSTMENTS
3.1 ADJUSTMENT PREPARATION
(1) There are 2 ways of adjusting this TV: One is with the REMOTE CONTROL UNIT and the other is the conventional method
using adjustment parts and components.
(2) The 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.
(3) Make sure that connection is correctly made AC to AC power source.
(4) Turn on the power of the TV and measuring instrument for warming up for at least 30 minutes before starting adjustment.
(5) If the receive or input signal is not specified, use the most appropriate signal for adjustment.
(6) Never touch parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service
adjustment.
(7) Preparation for adjustment (presetting):
Unless otherwise specified in the adjustment items, preset thefollowing functions with the REMOTE CONTROL UNIT:
Setting position
3.2 MEASURING INSTRUMENT AND FIXTURES
• DC voltmeter (or Digital voltmeter)
• Oscilloscope
• Signal generator (Pattern generator) [PAL/SECAM/NTSC]
• Remote control unit
Setting item Setting value
PICTURE MODE NORMAL
DIGITAL VNR AUTO
DIGIPURE PRO AUTO
SLEEP TIMER OFF
TONE BALANCE CENTRE
DIGITAL SURROUND OFF
BLUE BACK OFF
ZOOM MODE FULL

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3.3 ADJUSTMENT LOCATIONS
SIDE CONTROL PWB
TOP
POWER SW FRONT
POWER
LED
D8801 IC8851
F8901 LF8901 W
POWER CORD
FRONT
MAIN PWB POWER&DEF PWB
LINE FILETER PWB
FRONT CONTROL PWB
WLF9901
IC9931
P
X
X
P
CN001
CN002
CN003
DEF OSC PWB
CN009
CN2010
EHT
PWB
TOP
CRT SOCKET PWB
TP-R
TP-G
TP-B
TP-E1
(SOLDER SIDE)
R3040
T551
HYT
S1 15
1 GND
2 N.C.
3 X-ray
4 N.C.
5 B1
R2533
R2528 X-RAY ADJ
EHT ADJ
MAIN
TUNER
DOLBY PWB AV SW PWB
CN013
CN008
CN006
CN007
CN005
DIST PWB
CN8016
F
MICOM PWB
CN004
EHT
PWB
FOCUS
SCREEN
FOCUS
(HORIZONTAL)

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3.4 BASIC OPERATION IN SERVICE MENU
3.4.1 TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the remote control unit.
3.4.2 SERVICE MENU ITEMS
With the SERVICE MENU,various settings (adjustments)can be made,and they are broadly classified in the following items of set-
tings:
1.IF This mode adjusts the setting values of the IF circuit.
2.V/C This mode adjusts the setting values of the VIDEO / CHROMA circuit.
3.AUDIO This mode adjusts the setting values of the SOUND circuit.
It is not requirement to adjustment. (Setting only)
4.DEF This mode adjusts the setting values of the DEFLECTION circuit for each aspect mode given
5.VSM PRESET This mode adjusts the initial setting values of Bright, Standard & Soft. (VSM: Video Status Memory)
6.STATUS It is no requirement to adjustment.
7.VNR This mode adjusts the setting values of the DIGITAL circuit.
It is not requirement to adjustment. (Setting only)
8.IP This mode adjusts the setting values of the IP circuit.
It is not requirement to adjustment. (Setting only)
9.SHIPPING(OFF) Don't select under the adjustment.as this menu is set in "ON" after the inspection.
Note:
When users press the MAIN POWER button, the JVC logo appears.
If they press any keys, the LANGUAGE menu appears.
10.BUS FREE It is not requirement to adjustment.

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3.4.3 BASIC OPERATION IN SERVICE MENU
(1) How to enter SERVICE MENU
Press the [INFORMATION] key and the [MUTE] key of the
REMOTE CONTROL UNIT simultaneously, and the
SERVICE MENU screen of Fig. 1 will be displayed.
Fig.1
(2) Selection of SUB MENU SCREEN
Press one of keys [1~5] of the REMOTE CONTROL UNIT and
select the SUB MENU SCREEN (See Fig. 3), form the
SERVICE MENU.
SERVICE MENU ---> SUB MENU
•1.IF
•2.V/C
• 3. AUDIO (Do not adjust)
•4.DEF.
• 5. VSM PRESET
•6.STATUS(Do not adjust)
•7.VNR(Do not adjust)
•8.IP(Do not adjust)
• 9. SHIPPING (OFF) (Do not adjust)
• 0. BUS FREE (Do not adjust)
Fig.2
(3) Method of Setting
1) Method of Setting 1.IF
[1.VCO] : It must not adjust without signal.
2) Method of setting 2.V/C, 3.AUDIO, 4.DEF and 5.VSM PRESET.
3) Do not setting 6.STATUS, 7.VNR, 8.IP, 9.SHIPPING (OFF) and 0.BUS FREE.
(4) Release of SERVICE MENU
After completing the setting, return to the SERVICE MENU, then again press the [INFORMATION] key.
1. IF
3. AUDIO
5. VSM PRESET
7. VNR
2. V/C
6. STATUS
4. DEF
SERVICE MENU
SERVICE MENU
9. SHIPPING(OFF) 8. IP 0. BUS FREE
1-9 : SELECT i : EXIT
Names of key key
OK
INFORMATION
MUTING
OK
FUNCTION UP/DOWN
FONCTION -/+
Key Function
(a) [1] Select 1.1F
(b) [1] Select 1.VCO (CW)
Make sure that the arrow position between the ABOVE REF and BELOW REF.
(c) [INFORMATION] Return to the SERVICE MENU screen.
Key Function
(a) [2~5] Select one from 2.V/C, 3.AUDIO, 4.DEF and 5.VSM PRESET.
(b) FUNCTION UP /
DOWN ( ) Select setting items.
(c) FUNCTION -/+
( ) Set (adjust) the setting values of the setting items.
(d) OK 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.)
(e) INFORMATION Return to the SERVICE MENU screen.