JVC AV-32Z25EUY User manual

No.52067
A
V-32Z25EUY
A
V-28Z25EUY
1COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
Sep. 2002
AV-32Z25EUY
AV-28Z25EUY
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
･･････････････････････････････････
････
･･ 2
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････
････････････････････････････ 4
!FEATURES ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････
････････････････
････････ 5
!MAIN DIFFERENCE LIST････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････
････････････････････････････ 5
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
･････････････････････････････････････････････････
･･････････････････････････････････
･････････････････ 6
!SERVICE ADJUSTMENTS････････････････････････････････
････････････････････････････････････････････････････････････････
･･････････････････････････････････････････････････････････
････････････････････････････････････････････････････
･･････････････････････････ 12
!PARTS LIST ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････････････････････････････････････
･･････････････････････････････････････
････････････
･･････ 31
★OPERATING INSTRUCTIONS
★STANDARD CIRCUIT DIAGRAM ････････････････････････････････
････････････････････････････････････････････････････････････････
･･･････････････････････････････････････････････････
･･････････････････････････････････････
･･･････････････････ 2-1
SERVICE MANUAL
COLOUR TELEVISION
BASIC CHASSIS
MFⅡ
ⅡⅡ
Ⅱ

No.52067
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V-32Z25EU
Y
A
V-28Z25EU
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2
SPECIFICATIONS
Content
Item
AV-32Z25EUY AV-28Z25EUY
Dimensions ( W×
××
×H×
××
×D ) 946mm×562mm×551mm 854mm×508mm×494mm
Mass 58.0kg 43.0kg
TV RF System CCIR (B/G,D/K,I ,L/L’)
Colour System PAL / SECAM / NTSC (Only in EXT mode)
Stereo System A2 (B/G,D/K)/ NICAM (B/G,I,D/K,L)
Teletext System
FLOF (Fastext)
TOP (German system)
WST(World Standard system)
Receiving Frequency
VHF 47MHz ～470MHz
UHF 470MHz ～862MHz
French CATV 116MHz ～172MHz / 220MHz ～469MHz
Intermediate Frequency
VIF Carrier 38.9MHz (B/G, D/K, I ,L)/ 33.95MHz (L’)
SIF Carrier 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 Freq.
PAL 4.43MHz
SECAM 4.40625MHz/4.25MHz
NTSC 3.58MHz / 4.43MHz
Power Input 220 – 240 V AC, 50Hz 220 – 240 V AC, 50Hz
Power Consumption 300W (Max) / 161W(Avg), standby : 2.6W 292W (Max) / 150W(Avg), standby : 2.6W
Aerial Input Term 75Ωunbalanced, Coaxial
Picture Tube Visible size : 76cm, Measured diagonally Visible size : 66cm, Measured diagonally
High Voltage 31.0kV (CRT cutoff, FULL mode)
Speaker 6.5cm×13cm oval type ×2(side), 4cm×16cm oval type ×1(center), φ13cm round type ×1(sub woofer)
Audio Output (10W + 10W ) + 10W + 18W : (side L+R) + center + sub W oofer
EXT-1/EXT-2/EXT-3
(Input / Output)
21-pin Euro connector
(SCART socket)
EXT-4 (Input) Video
Audio(L/R)
S/Video
1Vp-p 75Ω(RCA pin jack)
500mVrms( -4dBs ), High Impedance ( RCA pin jack )
Y : 1Vp-p POSITIVE (Negative sync Provided, when terminated with 75Ω)
C : 0.3Vp-p (Burst signal, when terminated with 75Ω)
DIGITAL AUDIO INPUT OPTICAL×1, COAXIAL×1 (Dolby Digital is available.)
AUDIO OUT (Variable) 0～1Vrms, Low Impedance:(RCA pin jack×3)
SURROUND REAR OUT 7.5W + 7.5W, Impedance 8Ω(push terminal)
Headphone jack Stereo mini jack (φ3.5mm )
Remote Control Unit RM-C58H (AAA/R03 dry battery×2)
Design & specifications are subject to change without notice.
+1kV
-1.5kV
★Manufactured under license from Dolby Laboratories Licensing Corporation.
“Dolby”and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

No.52067
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V-32Z25EU
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V-28Z25EU
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3
■
■■
■21-pin Euro connector (SCART socket) : EXT-1 / EXT-2 / EXT-3
(P-P= Peak to Peak, B-W= Blanking to white peak)
Pin
No. Signal Designation Matching Value EXT-1 EXT-2 EXT-3
1 AUDIO R output 500mVrms(Nominal),
Low impedance
○
(TV OUT)
○
(LINE OUT)
NC
2 AUDIO R input 500mVrms(Nominal),
High impedance ○○○
3 AUDIO L output 500mVrms(Nominal),
Low impedance
○
(TV OUT)
○
(LINE OUT)
NC
4 AUDIO GND ○○○
5 GND (B) ○○○
6 AUDIO L input 500mVrms(Nominal),
High impedance ○○○
7Binput 700mVB-W, 75Ω○○
NC
8 FUNCTION SW
(SLOW SW)
Low : 0-3V, High : 8-12V, High
impedance
○○○
9 GND (G) ○○○
10 SCL3 NC ○NC
11 G input 700mVB-W, 75Ω○○
NC
12 SDA3 NC ○NC
13 GND (R) ○○○
14 GND (YS)○NC NC
15 R / C input R : 700mVB-W, 75Ω
C : 300mVP-P, 75Ω
○
(only R)
○○
(only C)
16 Ys input Low : 0 - 0.4, High : 1 - 3V, 75Ω○ NC NC
17 GND(VIDEO output) ○○○
18 GND(VIDEO input) ○○○
19 VIDEO output 1VP-P(Negative going sync), 75Ω○
(TV)
○
(LINE OUT) NC
20 VIDEO / Y input 1VP-P(Negative going sync), 75Ω○ ○ ○
21 COMMON GND ○○○
[Pin assignment]

No.52067
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V-32Z25EU
Y
A
V-28Z25EU
Y
4
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 10kΩ2W 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, screwheads, 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 1500Ω10W 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 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 Ω10W
GOOD EARTH GROUND
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
AC VOLTMETER
(HAVING 1000 Ω/V,
OR MORE SENSITIVITY)

No.52067
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V-32Z25EU
Y
A
V-28Z25EU
Y
5
FEATURES
"New chassis design enable use of an interactive on screen
control.
"The TELETEXT SYSTEM has a built-in FASTEXT (UK system),
TOP (German system) and WST (world standard system)
system.
"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 VCR dubbing of picture and sound by controlling
the AV selector to select an optional source at the EXT-2 output
shown in figure.
MAIN DIFFERENCE LIST
!ModelName
Part Name AV-32Z25EUY AV-28Z25EUY
!MAIN PWB ASSY SMF-1406A SMF-1405A
!POWER & DEF PWB ASSY SMF-2406A SMF-2405A
!CRT SOCKET PWB ASSY SMF-3406A SMF-3407A
!SIDE CONTROL PWB ASSY SMF-8106A SMF-8105A
!FRONT CABINET ASSY LC11360-005B-U LC11313-006A-U
!REAR COVER LC11316-001B-U LC11282-001C-U
!ITC TUBE (CRT) W76ERF042X044 W66QDE993X925
!DEGAUSSING COIL QQW0066-001 QQW0100-001
!FBT QQH0127-001 QQH0126-001
!RATING LABEL LC11548-001A-U LC11548-002A-U
EURO LABEL AEM1064-030-E AEM1064-031-E
CUSHION ASSY LC11361-001C LC11318-002C
PACKING CASE LC10101-017A LC10101-016A
TV EXT-1 EXT-3
EXT-2
EXT-4

No.52067
A
V-32Z25EU
Y
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V-28Z25EU
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6
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE SUB WOOFER UNIT & THE REAR
COVER
1. Unplug the power cord.
2. Remove the SUB WOOFER CORD from the AV TERMINAL
BOARD.
3. Pull up the SUB WOOFER UNIT on the top of the rear cover
upward.
4. Remove the 13 screws marked A as shown in the Fig. 1.
5. Withdraw the rear cover toward you.
REMOVING THE SIDE CONTROL JACK ASSEMBLY
"After removing the rear cover.
1. Remove the screw marked Bas 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 “SR”, “SL”, “S”, “F” and “CN016” as
shown in Fig. 2.
REMOVING THE SIDE CONTROL PWB
"After removing the rear cover and side control jack assembly.
1. Remove the 3 claws Cfrom back side of the side control jack
assembly as shown in Fig. 2.
2. Pull out the SIDE CONTROL PW B.
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 POWER & DEF. PWB
"After removing the chassis.
1. Remove the 3 screws marked Das shown in Fig. 1.
2. Remove the POWER & DEF. PWB upper.
(If necessary, take off the wire clamp, connectors etc.)
REMOVING THE CENTER SPEAKER
"After removing the rear cover and chassis.
1. Remove the 2 screws marked Eas shown in Fig. 1.
2. Remove the center speaker. If necessary, detach the cables.
REMOVING THE SIDE SPEAKER
"After removing the rear cover.
1. Remove the 2 screws marked F, and remove the speaker holder
as shown in Fig. 1.
NOTE : When removing the screws marked Fof the speaker holder
remove the lower side screw first, and then remove the
upper one.
2. Remove the 2 screws Gattaching the speaker.
3. Follow the same steps when removing the other hand speaker.
REMOVING THE AV TERMINAL BOARD
"After removing the rear cover.
1. Remove the 6 screws marked H as shown in the Fig. 1.
2. Remove the 2 claws marked Iunder the CHASSIS as shown in
Fig. 3.
3. Remove the AV TERMINAL BOARD slightly in the direction of
arrow Jas shown in Fig. 3.
4. After removing the craw Kon the connector for SUB WOOFER,
pull out the connector for SUB WOOFER. (Fig. 4)
CHECKING THE PW BOARD
To check the back side of the PW Board.
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.
SR
Connector
C
SIDE
CONTROL
PWB
Fig. 2
SL
S
F
CN016
(Back view)
C
AV SW PWB
I
J
I
Fig. 3
AV TERMINAL
BOARD
Fig. 4
WOOFER
CORD
K
K
AV TERMINAL
BOARD
CONNECTOR for
SUB WOOFER
SUB WOOFER
CORD

No.52067
A
V-32Z25EUY
A
V-28Z25EUY
7
Fig. 1
REAR COVER
FRONT CABINET
SIDE
SPEAKER
CRT
SOCKET
PWB
FRONT
CONTROL
PWB
POWER & DEF.
PWB
MAIN
PWB
AV SW
PWB
DOLBY
PWB
CLAW
CLAW
CHASSIS
CONTROL
BASE
AV TERMINAL
BOARD
A
G
H
CENTER
SPEAKER
B
SUB WOOFER UNIT
E
F
(×2)
(×13)
(×6)
Fig.2
Fi
g
.4
SUB WOOFER CORD
(×3)
D
SPEAKER
HOLDER
MICOM PWB
100Hz PWB
SIDE CONTROL
JACK ASSEMBLY
POWER CORD
This exploded view describes about AV-32Z25EUY.
A
lthough AV-28Z25EUY is slightly different from this
figure, you can use the exploded view for disassembling
the AV-28Z25EUY in same step as AV-32Z25EUY.

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
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.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 screw driver
as shown in Fig.6.
•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.
•The CRT should be assembled according to the opposite
sequence of its dismounting steps.
∗The CRT change table should preferably be smaller that the CRT
surface, and its height be about 35cm.
CRT CHANGE TABLE
CLOTH
APPROX.
35cm
CRT
CRT
CHANGE
TABLE
BOX
TYPE
SCREW
DRIVER
Fig. 5
Fig. 7
CRT
CABINET CRT
CHANGE TABLE
Fig. 6
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.

No.52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
9
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
A
B
C
A
B
C

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
10
REPLACEMENT OF MEMORY ICs
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.
2. Procedure for replacing memory ICs
PROCEDURE
(1) Power off
Switch the power off and unplug the power cord from the 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 outlet and switch the power on.
(4) Check and set SYSTEM CONSTANT SET:
*
**
* It must not adjust without signal.
1) Press the INFORMATION key and the MUTING 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, press the
INFORMATION key and MUTING 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. If the value is different, select the setting item with the
FUNCTION UP/DOWN key, and set the correct value with the
FUNCTION -/+ key.
5) Press the MENU key to memorize the setting value.
6) Press the INFORMATION key twice, and return to the normal
screen.
(5) Setting of receive channels
Set the receive channel.
For setting, refer to the OPERATING INSTRUCTIONS.
(6) User settings
Check the user setting values of 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 items of the SERVICE MENU of Table 3, and reset
where necessary.
For setting, refer to the SERVICE ADJUSTMENTS.
Names of key
i
ii
i
▼
▼
▼
▼
INFORMATION
MUTING
FUNCTION UP/DOWN
MENU
FUNCTION -/+
key
OK
NAME OF REMOTE CONTROL KEY
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. PIP 8. ---
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT i : EXIT
Fig.1
SYSTEM CONSTANT SET
1. DESTINATION EU
- /+ : STORE i : EXIT
Fig.2
OK

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
11
SETTING VALUES OF SYSTEM CONSTANT SET (TABLE 1)
Setting item Setting content Setting value Setting item Setting content Setting value
DESTINATION EU DOLBY YES
CRT TYPE 16:9 BBE NO
PURITY NO PROGRESSIVE YES
PICTURE TILT YES TDA9178 YES
DIGIPURE PRO YES TONE IC YES
PIP NO FLAT YES
PIC&TEXT YES
USER SETTING VALUES (TABLE 2)
PICTURE SETTING SOUND SETTING
TINT COOL
CONTRAST / BRIGHT
SHARP / COLOUR
BASS
TREBLE
BALANCE
CENTER
+3
CENTER
PICTURE FEATURES SURROUND
DIGITAL VNR AUTO DIGITAL SURROUND OFF
DIGIPURE PRO AUTO 3D PHONIC
TV SPEAKER LEFT / CENTER / RIGHTCOLOUR SYSTEM TV : According to preset CH
EXT : AUTO SUB WOOFER INT
LEVEL CENTER4:3 AUTO ASPECT PANORAMIC
VOLUME YELLOW POINT
EXT SETTING DOLBY SURROUND
TV SPEAKER LEFT / CENTER / RIGHT
REAR SPEAKER ON
ID
S-IN
DUBBING
BLANK
BLANK
EXT-1→EXT-2 SUB WOOFER INT
FEATURES TEST TONE OFF
SLEEP TIMER
BLUE BACK
OFF
ON
INSTALL
LANGUAGE ENGLISH
LEFT
CENTER
RIGHT
SURROUND
YELLOW POINT
EDIT/MANUAL PRESET CH only
The others : BLANK DELAY TIME 0
SERVICE MENU SETING ITEMS (TABLE 3)
Setting item Setting value Setting item Setting value
1. IF 1. VCO
2. ATT ON/OFF
4. DEF.
1. V-SHIFT
2. V-SIZE
3. H-CENT
4. H-SIZE
5. TRAPEZ
6. EW -PIN
7. COR-PIN
8. COR-UP
9. COR-LO
10. ANGLE
11. BOW
12. V-S.CR
13. V-LIN
2. V / C
1. RGB BLK
2. WDR R
3. WDR G
4. WDR B
5. BRIGHT
6. CONTRAST
7. COLOUR
8. HUE
9. SHARP
10. VCO ADJ.
11. VID AGC
12. SYC SLI
13. A MOVIE
3.AUDIO
(Do not adjust)
1. ERR LIMIT
2. A2 ID THR
3. Q-PEAK
5. VSM PRESET
COOL
NORMAL
WARM
1. CONT.
2. BRIGHT
3. SHARP
4. COLOUR
5. HUE
6. WDR R
7. WDR G
8. WDR B
9.SHIPPING
(Do not adjust) ON/OFF
6.STATUS
(Do not adjust)
VPS
PDC
REFER to VSM PRESET
EKEU EI
4:3
16:9
YES
NO
YESNO
YES
NO
1TUNER
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
2TUNER
＊
＊＊
＊: Do not adjust

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
12
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 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 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 the
following functions with the REMOTE CONTROL UNIT.
"Setting position
PICTURE MODE (VSM) NORMAL
SLEEP TIMER OFF
TONE BALANCE CENTER
ZOOM FULL
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 ITEMS
●Checking items.
●Adjustment of FOCUS & SCREEN
●VSM preset adjust setting.
●VIDEO / CHROMA circuit adjustment.
●DEFLECTION circuit adjustment.
●AUDIO circuit adjustment. (Do not adjust)

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
13
ADJUSTMENT LOCATIONS
E1
CN014
CN013
TP-E
CRT SOCKET PWB
(SOLDER SIDE)
TOP
FRONT
MAIN PWB POWER&DEF PWB
FRONT
CN001
AV SW PWB
TUNER
CN002
WDEG
1pin:B1(TP-91)
2pin:NC
3pin:X-ray
4pin:X-ray
5pin:TP-E
5
1
X
HV
TP-47B
CN014
CN013
MICOM PWB
100Hz PWB
CN004
CN005
CN006
TP-Y
FOCUS 2
SCREEN
FOCUS 1
32"MODEL
SCREEN
FOCUS
28"MODEL
CN018 CN008
DOLBY PWB
FRONT CONTROL PWB
FRONT
W
PW
F8901
POWER SW
CN001
S-IN
SIDE CONTROL PWB
E
X
T
4
HEAD
PHONE
UP
DOWN
MENU
SR
SL
S
F
CN016
TOP
HVT

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
14
BASIC OPERATION 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
(adjustments):
(1) 1. IF ･･･････････････････････ This mode adjusts the setting values of the IF circuit.
(2) 2.V/C ･･････････････････････ This mode adjusts the setting values of the VIDEO / CHROMA circuit.
(3) 3.AUDIO ･･･････････････････ This mode adjusts the setting values of the multiplicity SOUND circuit.
(4) 4.DEF ･････････････････････ This mode adjusts the setting values of the DEFLECTION circuit for each aspect mode given below.
FULL (100/120Hzi)
PANORAMIC (100/120Hzi)
SUBTITLE (100/120Hzi)
COMPRESS (Fixed value) (100/120Hzi)
(5) 5.VSM PRESET･････････････ This mode adjusts the initial setting values of COOL, NORMAL and WARM.
(VSM : Video Status Memory)
3. BASIC OPERATION OF SERVICE MENU
(1) How to enter SERVICE MENU
Press the “INFORMATION” key and the “MUTING” key of the
REMOTE CONTROL UNIT simultaneously, and the
SERVICE MENU screen of Fig.1 will be displayed.
(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
4. DEF.
5. VSM PRESET
6. STATUS
7. PIP
8. ---
9. SHIPPING (OFF)
0. BUS FREE
Names of key
i
ii
i
▼
▼
▼
▼
INFORMATION
MUTING
FUNCTION UP/DOWN
MENU
FUNCTION -/+
key
OK
SERVICE MENU
NAME OF REMOTE CONTROL KEY
Fig.2
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. PIP 8. ---
9. SHIPPING
(
OFF
)
0. BUS FREE
1-9 : SELECT i : EXIT
Fig.1
＊
＊＊
＊:Donot adjust

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
15
Fig.3 SUB MENU SCREEN
1. RGB BLK
2. WDR R
3. WDR G
4. WDR B
5. BRIGHT
6. CONTRAST
7. COLOUR
8. HUE
9. SHARP
10. VCO ADJ
11. VID AGC
12. SYC SLI
13. A MOVIE
SERVICE MENU
V/C
1. RGB_BLK
****
2. V/C
PAL
- / +
: STORE i : EXIT
DEF *** Hz FULL
1. V-SHIFT
4. DEF
***
- / +
: STORE i : EXIT
1. V-SHIFT
2. V-SIZE
3. H-CENT
4. H-SIZE
5. TRAPEZ
6. EW-PIN
7. COR-PIN
8. COR-UP
9. COR-LO
10. ANGLE
11. BOW
12.V-S.CR
13.V-LIN
IF SERVICE MENU
1. VCO
2. ATT ON/OFF
1-2 : SELECT i : EXIT
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. PIP (OFF) 8. - - -
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT : EXITi
1. ERR LIMIT
2. A2 ID THR
3. Q PEAK
AUDIO
3. AUDIO
1. ERR LIMIT 100H
ERROR RATE =
********
- / +
: STORE i : EXIT
1.IF(VCO)
COOL
NORMAL
WARM
5. VSM PRESET
VSM PRESET NORMAL
1.CONT
***
- / +
: STORE i : EXIT
1. CONT.
2. BRIGHT
3. SHARP
4. COLOUR
5. HUE
6. WDR R
7. WDR G
8. WDR B
Do not move
Do not adjust
OK
OK
OK OK

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
16
(3) Method of Setting
1) Method of Setting 1.IF
[VCO] ･･･････････････････････････････････ It must not adjust without signal.
①1 Key････････････････････････････････ Select 1.IF.
②1 Key････････････････････････････････ Select 1.VCO(CW)
Make sure that the arrow position between the ABOVE REF and BELOW REF.
③INFORMATION Key ･･･････････････････ Return to the SERVICE MENU screen.
2) Method of setting 2.V/C, 3.AUDIO, 4.DEF and 5.VSM PRESET.
①2～5 Key･････････････････････････････ Select one from 2.V/C, 3.AUDIO, 4.DEF and 5.VSM PRESET.
②FUNCTION UP / DOWN ( / ) Key ･････ Select setting items.
③FUNCTION -/+ ( / ) Key ･････････････ Set (adjust) the setting values of the setting items.
④MENU Key ･･･････････････････････････ Memorize the setting value.
(Bef ore storing the setting values in memory, do not press the CH, TV, POW ER ON /
OFF key - if you do, the values will not be stored in memory.)
⑤INFORMATION Key ･･･････････････････ Return to the SERVICE MENU screen.
3) Donotsetting6.STATUS, 7.PIP, 8.--- , 9.SHIPPING(OFF) & 0.BUS FREE.
(4) Release of SERVICE MENU
1) After completing the setting, return to the SERVICE MENU, then again press the INFORMATION key.

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
17
ADJUSTMENTS
CHECK ITEM
Item Measuring
instrument Test point Adjustment part Description
B1
Power Supply
check
Signal
generator
DC voltmeter
Remote
control unit
TP-91(B1)
TP-E(#
##
#)
[X connector
on POWER
DEF PWB]
1.RGB BLK 1. Receive a any broadcast.
2. Push the “ZOOM” key and select the FULL mode.
3. Select 2. V/C from the SERVICE MENU.
4. Select 1. RGB BLK with function UP / DOWN ( / ) key.
5. Press the function + ( ) key to find the cut off screen (Black
screen).
6. Connect a DC voltmeter to TP-91(B1) and TP-E(#).
7. Make sure that the voltage is DC139.9 ±2.0V.
8. Press the function – ( ) key to return to service menu..
High Voltage
check
Signal
generator
DC volunteer
Remote
control unit
CRT anode
Chassis
GND
1.RGB BLK 1. Receive a any broadcast.
2. Push the “ZOOM” key and select the FULL mode.
3. Select 2. V/C from the SERVICE MENU.
4. Select 1. RGB BLK with function UP / DOWN ( / ) key.
5. Press the function + ( ) key to find the cut off screen (Black
screen).
6. Connect a DC voltmeter to CRT ANODE and chassis GND.
7. Make sure that the voltage is DC 31.0kV .
8. Press the function – ( ) key to return to service menu.
VCO check Remote
control unit
1. VCO "Under normal conditions, no adjustment is required.
"Confirmation adjustment.
1. Select 1.IF from the SERVICE MENU.
2. Then select 1.VCO from the IF SERVICE MENU.
3. Receive any broadcast.
4. Check the arrow (←
←←
←) position between the ABOVE REF. and
BELOW REF.
+1kV
-1.5kV
TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW
i : EXIT
VCO(CW) **** MHz
MAIN
1. VCO
2. ATT ON/OFF
i : EXIT
IF SERVICE MENU
1-2 : SELECT
(Do not move)

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
18
FOCUS & SCREEN ADJUSTMENT
Item Measuring
instrument Test point Adjustment part Description
FOCUS
adjustment
[28” MODEL]
Signal
generator
FOCUS VR
[In HVT]
[28”MODEL]
1. Receive a cross-hatch signal.
2. Press the “ZOOM” key and select the FULL mode.
3. While watching the screen, adjust the FOCUS VR to make the
vertical and horizontal lines as fine and sharp as possible.
4. Make sure that when the screen is darkened, the lines remain
in good focus.
FOCUS
adjustment
[32” MODEL]
Signal
generator
FOCUS 1
FOCUS 2
[In HVT]
[32”MODEL]
1. Receive a cross-hatch signal.
2. Push the “ZOOM” key and select the FULL mode.
3. By turning the FOCUS2 VR, and adjust the picture so that the
“ ” part vertical line may become thinnest.
4. By turning the FOCUS1 VR, and adjust the picture so that the
3rd horizontal line from the upper may become uniform at the
line center and its periphery.
5. Carry out adjustment by repeating the steps 3 and 4 above.
6. Make sure that when the screen is darkened, the lines remain
in good focus.
SCREEN
Adjustment
Signal
generator
SCREEN VR
[In HVT]
1 Receive a whole black signal
2 Press the “ZOOM” key and select the FULL mode.
3 Select 2. V/C from the SERVICE MENU.
4 Turn the SCREEN VR clockwise from the full counter
clockwise position and stop it at the point where “CLOW” status
(marked in Fig.) changes from 1 to 0 to 1 (which is
indicated at the 3rd column from the right.)
5 Then turn the SCREEN VR counterclockwise, and stop where
the “CLOW” status changes 1 to 0
＊“CLOW” : control loopout of window.
SCREEN VR
HVT
FOCUS VR
V/C
1. RGB BLK
00
CLOW
status
- / +
: STORE i : EXIT
OK
0 0 0 0 0 1 0 0
PAL
SERVICE MODE SCREEN
FOCUS2(F2)
SCREEN1(S1)
FOCUS1(F1)
HVT
FOCUS 2
FOCUS 1

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
19
VSM PRESET ADJUST SETTING
Item Measuring
instrument Test point Adjustment part Description
VSM PRESET
setting
Remote
control unit
1. CONT.
2. BRIGHT
3. SHARP
4. COLOUR
5. HUE
6. WDR R
7. WDR G
8. WDR B
1. Select COOL with the MENU key of the remote control unit.
2. Select 5.VSM PRESET from the SERVICE MENU.
3. Adjust the FUNCTION UP/DOWN ( / ) and -/+ ( / )key to
bring the set values of 1.CONT ～8. W DR B to the values
shown in the table.
4. Press the MENU key and memorize the set value.
5. Respectively select the VSM PRESET mode for NORMAL and
WARM, and make similar adjustment as in 3 above.
6. Press the MENU key and memorize the set value.
＊Refer to OPERATING INSTRUCTIONS for the PICTURE
MODE.
1.CONT. 2.BRIGHT 3.SHARP 4.COLOUR 5.HUE 6.WDR R 7.WDR G 8.WDR B
COOL [phone]
32” NORMAL 00-1000000
WARM -13 0 -10 -1 0 +5 0 0
COOL [phone]
28” NORMAL -30-1200000
WARM -13 0 -12 -1 0 +5 0 0
SETTING VALUES OF VSM PRESET

No. 52067
A
V-32Z25EU
Y
A
V-28Z25EU
Y
20
VIDEO / CHROMA CIRCUIT ADJUSTMENT
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.
Setting item
(Adjustment item) Initial setting value
2. V/C PAL SECAM NTSC
1.RGB BLK
2.WDR R 0000
3.WDR G 0000
4.WDR B (Do not move) -012
5.BRIGHT 0000
6.CONTRAST 0060
7.COLOUR 0000
8.HUE 0020
9.SHARP (Do not move) 0007
10.VCO ADJ. (Do not move)
11.VID AGC (Do not move) 0000
12.SYC SLI (Do not move) 0007
13.A MOVIE (Do not move) 0001
＊
＊＊
＊: Do not move