JVC AV-N34301 User manual

No.51738
Aug. 2000
A
V-N29301
A
V-N34301
1COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
AV-N29301
AV-N34301
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････････････････
･･････････････････････････････････････････････････････････
･････････････････････････････ 2
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 3
!FEATURES････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･
･･････
･･･ 4
★INSTRUCCIONES DE OPERACIÓN (APPENDIX) ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･
･･････
･･･ 1-1
!FUNCTIONS････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･
････
･･ 5
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････
･･････････････････････････
･････････････ 6
!SERVICE ADJUSTMENTS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････････
･･････････････････････････････････････････
･････････････････････ 12
★STANDARD CIRCUIT DIAGRAM (APPENDIX) ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････
･･････････
･････ 2-1
!PARTS LIST････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･
･･
･31
SERVICE MANUAL
COLOR TELEVISION
BASIC CHASSIS
GF2

No.51738
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V-N29301
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V-N34301
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SPECIFICATIONS
Contents
Items AV-N29301 AV-N34301
Dimensions (W×
××
×H×
××
×D) 29-5/8”×23-1/4”×19-1/2”
75.2cm×59cm×49.4cm 33-7/8”×27”×21-5/8” 85.9cm×68.4cm×54.8cm
Mass 35.5kg 52kg
TV System and Color system
TV RF System
Color System
Sound System
CCIR(M)
NTSC
BTSC (Multi Channel Sound)
TV Receiving Channels and Frequency
VL Band
VH Band
UHF Band
(02～06) 54MHz～88MHz
(07～13) 174MHz～216MHz
(14～69) 470MHz～806MHz
CATV Receiving Channels and Frequency
Low Band
High Band
Mid Band
Super Band
Hyper Band
Ultra Band
Sub Mid Band
TV/CATV Total Channel
(02～06)
(07～13)
(14～22)
(23～36)
(37～64)
(65～94, 100～125)
(01, 96～99)
180 Channels
Intermediate Frequency
Video IF Carrier
Sound IF Carrier 45.75 MHz
41.25 MHz (4.5MHz)
Color Sub Carrier 3.58 MHz
Power Input 120V AC, 60Hz
Power Consumption 125W 135W
Picture Tube 29” (74cm) measured diagonally, Full Square 34” (86cm) measured diagonally, Full Square
High Voltage 29kV±1.3kV (at zero beam current) 31kV±1.3kV (at zero beam current)
Speaker 2”×4-3/4” / 5×12cm Oblong type×2
Audio Power Output 5W+5W
Input (1 / 2) Video : 1Vp-p 75Ω(RCA pin jack)
Audio : 500mVrms (-4dBs), High Impedance (RCA pin jack)
S-Video Y : 1Vp-p positive (negative sync provided, when terminated with 75Ω)
C : 0.286Vp-p (burst signal, when terminated with 75Ω)
Audio Output
(Variable / Fix : Selectable) Variable : More then 0～1550mVrms (+6dBs)
Low Impedance (400Hz when modulated 100%) (RCA pin jack)
Fix : 500mVrms(-4dBs)
Low Impedance (400Hz when modulated 100%) (RCA pin jack)
AV Compu link EX Input 3.5mm mini jack
Antenna terminal 75Ω(VHF/UHF) Terminal, F-Type Connector
Remote Control Unit RM-C382-1A (AA/R6/UM-3 battery×2)
Design & specifications are subject to change without notice.
(54MHz～804MHz)
Front input terminal is the bridge
connection with Input 2 terminal

No. 51738
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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. Use isolation transformer when hot chassis.
The chassis and any sub-chassis contained in some products
are connected to one side of the AC power line. An isolation
transformer of adequate capacity should be inserted between
the product and the AC power supply point while performing
any service on some products when the HOT chassis is
exposed.
5. Don't short between the LIVE side ground and ISOLATED
(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.
6. 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).
7. The high voltage applied to the picture tube must conform with
that specified in Service manual. Excessive high voltage can
cause an increase in X-Ray emission, arcing and possible
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect installation, cracked or melted high voltage harness,
poor soldering, etc.). To maintain the proper minimum level of
soft X-Ray emission, components in the high voltage circuitry
including the picture tube must be the exact replacements or
alternatives approved by the manufacturer of the complete
product.
8. Do not check high voltage by drawing an arc. Use a high
voltage meter or a high voltage probe with a VTVM. Discharge
the picture tube before attempting meter connection, by
connecting a clip lead to the ground frame and connecting the
other end of the lead through a 10kΩ2W resistor to the anode
button.
9. When service is required, observe the original lead dress.
Extra precaution should be given to assure correct lead dress
in the high voltage circuit area. Where a short circuit has
occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.
10. 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
1100V 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
Ω
10W
GOOD
EARTH
GROUND
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
AC VOLTMETER
(HAVING 1000
Ω
/V,
OR MORE SENSITIVITY)
11. High voltage hold down circuit check.
After repair of the high voltage hold down circuit, this circuit
shall be checked to operate correctly.
See item "How to check the high voltage hold down
circuit".
A V
This mark shows afast
operating fuse, the
letters indicated below
show the rating.

No.51738
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FEATURES
"New chassis design enables use of a main board with simplified
circuitry.
"Digital comb filter Improved picture quality.
"Provided with 2 tuner (TV/CATV, PIP).
"Full-square CRT (cathode ray tube) reproduces fine textured
picture in every detail.
"With AV COMPU LINK EX terminal.
"Closed-caption broadcasts can be viewed.
"With AUDIO. VIDEO INPUT terminal.
"S-VIDEO input terminal for taking best advantage of Super VHS.
"Variable / Fix audio output terminal.
"Built-in PIP system.
"I
2C bus control utilizes single chip ICs.
"Built-in V-CHIP system.
"Built-in HYPER-SURROUND system.

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FUNCTIONS
■
■■
■REMOTE CONTROL UNIT
( RM-C382-1A)
■
■■
■REAR PANEL
■
■■
■FRONT PANEL

No. 51738
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SPECIFIC SERVICE INSTRUCTION
DISASSEMBLY PROCEDURE
REMOVE THE REAR COVER
"Unplug the power plug.
1. Remove the
12 screws marked A
AA
A
as shown in Fig.2.
2. Remove the rear cover toward you.
* When reinstalling the rear cover, carefully push it inward after
inserting the chassis into the rear cover groove.
REMOVING THE CHASSIS
"After removing the rear cover.
1. Slightly raise the both sides of the chassis by hand and remove
the 2claws under the both sides of the chassis from the front
cabinet.
2. As shown in the Fig.2, withdraw the chassis backward along the
rail in the arrow direction marked B
BB
B.
(If necessary, take off the wire clamp, connector’s etc.)
* When conducting a check with power supplied, be sure to
confirm that the CRT earth wire is connected to the CRT
SOCKET PWB and the MAIN PWB.
REMOVING THE TERMINAL BOARD
"After removing the rear cover.
1. As shown in Fig.2, remove the 3screws marked C
CC
C.
2. As shown in Fig.1, after removing the claw marked D
DD
Din the
direction of arrow mark.
3. When you pull out the TERMINAL BOARD in the direction of
arrow marked E
EE
Eas shown in Fig.1, it can be removed.
REMOVING THE FRONT CONTROL PW BOARD
"After removing the rear cover and chassis.
1. As shown in Fig.2, remove the 3screws marked F
FF
F.
2. Then remove the FRONT CONTROL PWB.
REMOVING THE FRONT AV IN PW BOARD
"After removing the rear cover and chassis.
1. As shown in Fig.2, remove the 2screws marked G
GG
G.
2. Then remove the FRONT AV IN PWB.
REMOVING THE SPEAKER
"After removing the rear cover and chassis.
1. As shown in Fig.2, remove the 4screws marked H
HH
H.
2. Follow the same steps when removing the other hand speaker.
CHECKING THE MAIN PW BOARD
1. To check the backside of the MAIN PW Board.
(1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).
(2) Erect the chassis vertically so that you can easily check the
backside of the MAIN PW Board.
[CAUTION]
•When erecting the chassis, be careful so that there will be no
contacting with other PWB.
•Before turning on power, make sure that the CRT earth wire and
other connectors are properly connected.
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.
TERMINAL BOARD
Fig. 1
E
D
PIP PWB

No. 51738
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Fig. 2
FRONT CABINET
PICTURE TUBE
SPEAKER
H
H
SPEAKER
CRT SOCKET PWB
FRONT AV IN PWB
FRONT
CONTROL PWB
F
G
MAIN PWB HVT
AV SELECTOR PWB
PIP PWB
POWER CORD
C
REAR COVER
A(×12)
CHASSIS
BASE
TERMINAL
BOARD
CLAW
CLAW
B
(×3)

No. 51738
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REMOVING THE CRT
!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.3).
2. While keeping the surface of CRT down, mount the TV set on
the CRT change table balanced will as shown in Fig.4.
3. Remove 4 screws marked by arrows with a box type
screwdriver as shown in Fig.4.
"Since the cabinet will drop when screws have been 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 sticks
to the anode button. (Fig.7)
★
★★
★Silicon grease product No. KS - 650N
CRT CHANGE TABLE
CLOTH
A
PPROX.
35cm
Fig. 3
Fig. 4
Fig. 5
CRT
CABINET CRT
CHANGE TABLE
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
CRT
CRT
CHANGE
TABLE BOX
TYPE
SCREW
DRIVER

No.51738
A
V-N29301
A
V-N34301
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
AB
C
A
B
C

No. 51738
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V-N29301
A
V-N34301
10
MEMORY IC REPLACEMENT
1. Memory IC
This model uses a memory IC.
This memory IC stores data for proper operation of the video and deflection circuits.
When replacing, be sure to use an IC containing this (initial value) data.
2. Memory IC replacement procedure
Procedure Screen display
(1) Power off
Switch off the power and disconnect the power cord from the outlet.
(2) Replace the memory IC
Initial value must be entered into the new IC.
(3) Power on
Connect the power cord to the outlet and switch on the power.
(4) System constant check and setting
*
**
* It must not adjust without signal.
1) Press
SLEEP TIMER key and, while the indication of “SLEEP TIMER 0
MIN.” is being displayed, press DISPLAY key and VIDEO STATUS key
on the remote control unit simultaneously.
2) The SERVICE MENU screen of Fig.1 is displayed.
3) While the SERVICE MENU is displayed, again simultaneously press
the DISPLAY and VIDEO STATUS keys to display the Fig.2 SYSTEM
CONSTANT screen.
4) Refer to the SYSTEM CONSTANT table and check the setting items.
Where these differ, select the setting item with the MENU UP/DOWN
key and adjust the setting with the MENU LEFT/RIGHT keys. (The
letters of the selected item are displayed in yellow.)
5) After adjusting, release the MENU LEFT/RIGHT key to store the setting
value.
6) Press the EXIT key twice to return the normal screen.
(5) Receive channel setting
Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set
the receive channels (Channels Preset) as described.
(6) User settings
Check the user setting items according to Table 2.
Where these do not agree, refer to the OPERATING INSTRUCTIONS
(USER'S GUIDE) and set the items as described.
(7) SERVICE MENU setting
Verify what to set in the SERVICE MENU, and set whatever is
necessary. (Fig.1) Refer to the SERVICE ADJUSTMENT for setting.
SERVICE MENU
PICTURE SOUND
THEATER OTHERS
PIP
LOW LIGHT HIGH LIGHT
RF AFC 1 RF AFC 2
VCO
(
CW
)
I2C BUS CTRL
SELECT BY
OPERATE BY EXIT BY
EX
IT
Fig.1
SYSTEM CONSTANT
MODEL : XX-XXXXX
CCD : YES
BBE : NO
V-CHIP : YES
CAN V-CHIP : NO
XXXXXXXXX XXX
SELECT BY
OPERATE BY EXIT BY
EX
IT
Fig.2

No. 51738
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V-N29301
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V-N34301
11
TABLE 1 (System Constant setting)
Setting valueSetting item Setting constant
AV-N29301 AV-N34301
MODEL AV-27150 AV-32150 AV-36150
AV-32115 AV-36120 AV-32120 AV-27150 AV-32150
CCD YES NO YES YES
BBE YES NO NO NO
V-CHIP YES NO YES YES
CAN V-CHIP YES NO NO NO
TABLE 2 (User setting)
Setting item Setting value Setting item Setting value
1. Use remote controller keys
POWER
CHANNEL
VOLUME
INPUT
HYPER SURROUND
OFF
CH-02
Proper sound volume
TV
OFF
DISPLAY
VIDEO STATUS
SLEEP TIMER
PIP SOURCE
PIP POSITION
OFF
ESTANDAR
0
CH-04
Lower left
2. Settings of MENU
TINTE
COLOR
CONTRASTE
BRILLO
DETALLE
PANTALLA AZUL
FIJAR VIDEO STATUS
GRAVES
AGUDOS
BALANCE
MTS
AJUSTE DEL RELOJ
TEMPORIZADOR
CENTER
CENTER
CENTER
CENTER
CENTER
SI
ALL CENTER
CENTER
CENTER
CENTER
ESTEREO
Unnecessary to set
NO
ALTAVOCES
SALIDA AUDIO
IDIOMA
SUBTITULOS OCULTOS
AUTOPROGRAMACION
LISTA DE CANALES
V-CHIP
BLOQUEO DE CANAL
SI
FIX
ESP.
MODO : NO
MODO : TV
Unnecessary to set
OFF
SET US TV RATINGS ALL
SET MOVIE RATINGS CLEAR
UNRATED : VIEW
Unnecessary to set

No. 51738
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V-N29301
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V-N34301
12
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION:
1. You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment equipment and
parts as given below.
2. Adjustment with the remote control unit is made on the basis of the initial setting values, however, the new setting values which
set the screen to its optimum condition may differ from the initial settings.
3. Make sure that AC power is turned on correctly.
4. Turn on the power for the set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
6. Never touch any adjustment parts, which are not specified in the list for this adjustment-variable resistors, transformers, condensers, etc.
7. Presetting before adjustment.
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
VIDEO STATUS ESTANDAR
HYPER SURROUND OFF
GRAVAS, AGUDOS, BALANCE CENTER
TINTE, COLOR, CONTRASTE, BRILLO,
DETALLE CENTER
MEASURING INSTRUMENT
1. DC voltmeter(or digital voltmeter)
2. Oscilloscope
3. Signal generator ( Pattern generator ) [NTSC]
4. Remote control unit
5. TV audio multiplex signal generator
6. Frequency counter
ADJUSTMENTS
●Check of B1 POWER SUPPLY
●IF VCO adjustment
●RF AGC adjustment
●FOCUS adjustment
●DEFLECTION adjustment
V. CENTER, V. SIZE, V. POSITION adjustment
H. WIDTH, SIDEPIN CORRECT and H. POSITION
adjustment
●VIDEO / CHROMA adjustment
WHITE BALANCE (Low light) adjustment
WHITE BALANCE (High light) adjustment
SUB BRIGHT adjustment
SUB CONTRAST adjustment
SUB COLOR adjustment
SUB TINT adjustment
●PIP circuit adjustment
WHITE BALANCE adjustment
DISPLAY POSITION adjustment
●MTS circuit adjustment
INPUT LEVEL check
STEREO VCO adjustment
SAP VCO adjustment
FILTER check
SEPARATION adjustment

No. 51738
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V-N29301
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V-N34301
13
ADJUSTMENT LOCATIONS
MAIN PWB
FRONT
FRONT CONTROL PWB FRONT
POWER MENUVOL CH
IC841
D
F
FRONT
FRONT AV IN PWB
CRT EARTH
(BRAIDED ASS'Y)
TP-R
CRT SOCKET PWB
(SOLDER SIDE)
TOP
T
TP-B
E2
TP-E( ) U
TP-G
IC701
CN001
DEG.
D
TUNER
AV
SELECTOR
PWB
TP-E
( )
B1
(TP-91)
B1 1
3
HV
E1
CRT EARTH
(BRAIDED ASS'Y)
U
V CENTER SW
IC702
S
T
UPPER : FOCUS
LOWER : SCREEN
S421
IC201
MPX
CN002
FM DET
T161
PW
F901
CW
T131 H
HH
HV
VV
VT
TT
T
PIP PWB
X
H.WIDTH
SIDEPIN
CORRECT

No. 51738
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14
BASIC OPERATION OF SERVICE MENU
1. TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
2. SERVICE MENU ITEMS
In general, basic setting (adjustments) items or verifications are performed in the SERVICE MENU.
"PICTURE････････････････････ This set the setting values (adjustment values) of the VIDEO/CHROMA and DEFLECTION circuits.
"SOUND ･････････････････････ This set the setting values (adjustment values) of the AUDIO circuit.
"THEATER ･･･････････････････ This is used when the THEATER MODE is adjusted.
"OTHERS ････････････････････ This is used when the OTHERS MODE is adjusted.
"PIP ･････････････････････････ This set the setting values (adjustment values) of the PICTURE-IN-PICTURE circuit.
(PIP is means as Picture in Picture)
"LOW LIGHT･･････････････････ This sets the setting values (adjustment values) of the WHITE BALANCE circuit.
"HIGH LIGHT ･････････････････ This sets the setting values (adjustment values) of the WHITE BALANCE circuit.
"RF AFC 1････････････････････ This is used when the RF AFC 1 MODE is verified. [Do not adjust]
"RF AFC 2････････････････････ This is used when the RF AFC 2 MODE is verified. [Do not adjust]
"VCO (CW) ･･･････････････････ This is used when the IF VCO is adjusted.
"I2C BUS CTRL････････････････ This is used when ON/OFF of the I2C BUS CTRL is set. [Fixed ON]
3. Basic Operations of the SERVICE MENU
(1) How to enter the SERVICE MENU.
Press SLEEP TIMER key and, while the indication of “SLEEP TIMER 0 MIN.” is being displayed, press DISPLAY key and VIDEO
STATUS key on the remote control unit simultaneously to enter the SERVICE MENU screen ①shown in the next figure page.
(2) SERVICE MENU screen selection
Press the UP / DOWN key of the MENU to select any of the following items.
(The letters of the selected items are displayed in yellow.)
●PICTURE ●SOUND
●THEATER ●OTHERS
●PIP
●LOW LIGHT ●HIGH LIGHT
●RF AFC 1 ●RF AFC 2
●VCO (CW) ●I
2C BUS CTRL
(3) Enter the any setting ( adjustment ) mode
"PICTURE, SOUND and OTHERS mode
1) If select any of PICTURE, SOUND or OTHERS items, and the LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN
MENU ), the screen ②will be displayed as shown in figure page later.
2) Then the UP / DOWN key is pressed, the PICTURE mode screen ③or the SOUND mode screen ④or the OTHERS mode
screen ⑤is displayed, and the PICTURE, SOUND or OTHERS setting can be performed.
"PIP mode
1) If select the PIP item, and the LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN MENU ), the screen ⑥will be
displayed as shown in figure page later.
2) Then UP / DOWN key is pressed, the PIP mode screen ⑦is displayed, and the PIP setting can be performed.
"THEATER, LOW LIGHT, HIGH LIGHT, RF AFC1, RF AFC2, VCO (CW) and I2C BUS CTRL mode
1) If select any of THEATER / LOW LIGHT / HIGH LIGHT / RF AFC 1 / RF AFC 2 / VCO (CW) / I2C BUS CTRL items, and the
LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN MENU ), the screens 8 ⑨⑩⑪⑫⑬⑭will be displayed as
shown in figure page later.
2) Then the settings or verifications can be performed.

No. 51738
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V-N29301
A
V-N34301
15
SERVICE MENU
PICTURE SOUND
THEATER OTHERS
PIP
LOW LIGHT HIGH LIGHT
RF AFC 1 RF AFC 2
VCO
(
CW
)
I2C BUS CTRL
SELECT BY
OPERATE BY
EX
IT
EXIT BY SELECT BY
EX
IT
EXIT BY
SELECT BY
EX
IT
EXIT BY
TINT
COLOR
PICTURE
BRIGHT
DETAIL
G DRIVE
B DRIVE
R CUT.
G CUT.
B CUT.
***
***
***
***
***
***
***
***
***
***
SELECT BY
OPERATE BY
EX
IT
EXIT BY
BRIGHT
***
*** *** ***
HIGH LIGHT
*** ***
RF AFC 1 ON
FINE
***
STATUS
********
SELECT BY
OPERATE BY
EX
IT
EXIT BY
RF AFC 2 ON
FINE
***
SELECT BY
OPERATE BY
EX
IT
EXIT BY
①
①①
①
SERVICE MENU (MAIN MENU)
④
④④
④
SOUND MODE
⑤
⑤⑤
⑤
OTHERS MODE
⑦
⑦⑦
⑦
PIP MODE
⑧
⑧⑧
⑧
THEATER MODE
⑨
⑨⑨
⑨
LOW LIGHT MODE
⑩
⑩⑩
⑩
HIGH LIGHT MODE
⑪
⑪⑪
⑪
RF AFC1 MODE
[DO NOT ADJUST]
⑫
⑫⑫
⑫
RF AFC2 MODE
[DO NOT ADJUST]
1. ATTENUATOR
STATUS
***
********
1. OSD POS.
***
1. PIP BR
STATUS
***
*******
I2C BUS ON
SELECT BY
OPERATE BY
EX
IT
EXIT BY
②
②②
②
SCREEN
⑥
⑥⑥
⑥
SCREEN
③
③③
③
PICTURE MODE
1. BRIGHT
STATUS
***
********
HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL
SYNC : YES
⑬
⑬⑬
⑬
VCO (CW) MODE
⑭
⑭⑭
⑭
I
2
C BUS CTRL MODE
[FIXED ON]

No. 51738
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16
(4) Setting method
1) UP / DOWN key of the MENU
Select the SETTING ITEM.
2) LEFT / RIGHT key of the MENU
Setting (adjust) the SETTING VALUE of the SETTING ITEM.
When the key is released the SETTING VALUE will be stored
(memorized).
3) EXIT key
Returns to the previous screen.
(5) Releasing SERVICE MENU
1) After returning to the SERVICE MENU upon completion of the setting
(adjustment) work, press the EXIT key again.
★The settings for LOW LIGHT and HIGH LIGHT are described in the WHITE
BALANCE page of ADJUSTMENT.
★The setting for VCO (CW) are described in the IF VCO page of ADJUSTMENT.
TINT
COLOR
PICTURE
BRIGHT
DETAIL
SELECT BY
OPERATE BY EXIT BY
G DRIVE
B DRIVE
R CUT.
G CUT.
B CUT.
***
***
***
***
***
***
***
***
***
***
EX
IT
THEATER MODE
1. OSD POS.
***
OTHERS MODE
1. ATTENUATOR
STATUS
***
********
SOUND MODE
1. BRIGHT
STATUS
***
********
PICTURE MODE INITIAL
SETTING VALUE
↓(Adjust)
SETTING VALUE
SETTING
ITEM
The letters of the selected
items are displayed in
yellow.
1. PIP BR
STATUS
***
*******
PIP MODE

No. 51738
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V-N29301
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V-N34301
17
INITIAL SETTING VALUE OF SERVICE MENU
1. Adjustment of the SERVICE MENU is made on the basis of the initial setting values; however, the new setting values which set the
screen in its optimum condition may differ from the initial setting.
2. Do not change the initial Setting Values of the Setting (Adjustment) items not listed in “ADJUSTMENT”.
"PICTURE MODE
$The four setting items in the video mode No.8 EXT BRI., No.9 EXT PIC., No.12 EXT TINT and No.13 EXT COLOR are linked to the items in
the TV MODE No.1 BRIGHT, No.2 PICTURE, No.6 TINT and No.7 COLOR, respectively. When the setting items in the TV mode are
adjusted, the values in the setting items in the video mode are revised automatically to the same values in the TV mode. (The initial setting
values given in ( ) are off-set values.)
$When the four items (No.8, 9, 12 and 13) are adjusted in the video mode, the setting values in each item are revised independently.
Initial setting value
No. Setting (Adjustment) item Variable range AV-N29301 AV-N34301
1. BRIGHT 000～127 064 064
2. PICTURE 000～127 088 090
3. WPS (WHITE PEAK SUPPRESSOR) 000 / 001 001 001
4. TV DETAIL 000～063 040 040
5. TV BPF (TV B.P.FILTER) 000 / 001 001 001
6. TINT 000～127 067 074
7. COLOR 000～127 047 053
8. EXT BRIGHT ±25 (+001) (+001)
9. EXT PICT. ±25 (±000) (±000)
10. EXT DETAIL 000～063 038 038
11. EXT BPF (EXT B.P.FILTER) 000 / 001 001 001
12. EXT TINT ±25 (+002) (+007)
13. EXT COLOR ±25 (+003) (+005)
14. V SIZE 000～063 015 033
15. V CENTER 000～007 000 000
16. H POSITION 000～031 022 022
17. H AFC 000 / 001 000 000
18. BLANKING 000 / 001 000 000
19. RF AGC 000～063 035 035
20. PIF VCO 000～127 064 064
"SOUND MODE
No
.Setting (Adjustment) item Variable range Initial setting value
1. ATTENUATOR 000～063 050
2. BALANCE 000～063 032
3. NOISE DET. 000 / 001 001
4. IN LEVEL (INPUT LEVEL) 000～063 027
5. FH MONITOR 000 / 001 000
6. STEREO VCO 000～063 023
7. PILOT CAN. (PILOT CANCELER) 000 / 001 000
8. FILTER 000～063 030
9. LOW SEP. (LOW SEPARATION) 000～063 028
10. HI SEP. (HIGH SEPARATION) 000～063 019
11. 5FH MON. (5FH MONITOR) 000 / 001 000
12. SAP VCO 000～063 027
13. IN GAIN 000 / 001 000
14. FIL. OFFSET ±010 ±000
15. BBE BASS ±010 -001
16. BBE TRE ±010 -001

No. 51738
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18
"THEATER MODE
Setting (Adjustment) item Variable range Initial setting value
TINT ±20 ±00
COLOR ±20 -02
PICTURE -30～+20 -15
BRIGHT ±20 ±00
DETAIL ±15 -03
G DRIVE -99～+50 -25
B DRIVE -99～+50 -72
R CUT. (R CUTOFF) ±10 ±00
G CUT. (G CUTOFF) ±10 ±00
B CUT. (B CUTOFF) ±10 ±00
"OTHERS MODE
Initial setting value
No. Setting (Adjustment) item Variable range AV-N29301 AV-N34301
1. OSD POS. 000～007 000 000
2. CCD POS.
(CLOSED CAPTION DECODER POS.) 000～015 002 004
3. EOSEL 000 / 001 000 000
4. F1 FIELD 000 / 001 000 000
5. F1 LINE21 000～015 008 008
6. F2 LINE21 000～015 008 008
7. OSD STABI. 000 / 001 000 000
8. SYNC SEP. 000 / 001 001 001
9. MENU COLOR -030～±000 -010 -010
10. MENU PICT -030～±000 -012 -012
11. MENU BRI -030～±000 -012 -012
12. TU1 FM TRP 000 / 001 000 000
13. TU2 FM TRP 000 / 001 000 000
"PIP MODE
Initial setting value
No. Setting (Adjustment) item Variable range AV-N29301 AV-N34301
1. PIP BR 000～015 005 007
2. PIP PICT 000～075 045 045
3. PIP TINT 000～063 032 034
4. PIP COL 000～015 009 009
5. P R CUT 000～015 000 000
6. P G CUT 000～015 000 000
7. P B CUT 000～015 000 000
8. P R DR 000～255 128 131
9. P G DR 000～255 128 131
10. P B DR 000～255 128 131
11. LEFT POS. 000～255 019 019
12. RIGHT POS 000～255 019 019
13. UPPER POS. 000～127 012 012
14. LOWER POS 000～127 011 011
15. PICT LOCK 000 / 001 000 000
16. SELDEL 000～015 000 000
17. AGCFIX 000 / 001 001 001
18. AGCADST 000 / 001 000 000
19. AGC 000～015 007 007
20. VSPDEL 000～031 000 000

No. 51738
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V-N34301
19
Initial setting value
No. Setting (Adjustment) item Variable range AV-N29301 AV-N34301
21. VSPISQ 000 / 001 001 001
22. YCOR 000 / 001 001 001
23. XFREQF 000 / 001 001 001
24. WTCHDG 000 / 001 001 001
25. COLON 000 / 001 000 000
26. ACQNEW 000 / 001 000 000
27. DSTDET 000 / 001 001 001
28. CRIBEOK 000 / 001 000 000
29. FCBEOK 000 / 001 000 000
30. NOCRID 000 / 001 000 000
31. NONSED 000 / 001 000 000
"LOW LIGHT MODE
Setting (Adjustment) item Variable range Initial setting value
R CUTOFF 000～255 020
G CUTOFF 000～255 020
B CUTOFF 000～255 020
"HIGH LIGHT MODE
Setting (Adjustment) item Variable range Initial setting value
G DRIVE 000～255 128
B DRIVE 000～255 128
"RF AFC 1 MODE
Setting (Adjustment) item Variable range Initial setting value
RF AFC 1 ON/OFF ON
FINE -77～+77 ±××
"RF AFC 2 MODE
Setting (Adjustment) item Variable range Initial setting value
RF AFC 2 ON/OFF ON
FINE -77～+77 ±××
"I2C BUS CTRL MODE
Setting (Adjustment) item Variable range Initial setting value
I2C BUS ON/OFF [Fixed ON]
DO NOT
A
DJUST
DO NOT
A
DJUST

No. 51738
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V-N34301
20
■
■■
■ADJUSTMENTS
B1 POWER SUPPLY
Item Measuring
instrument Test point Adjustment part Description
Check of
B1 POWER
SUPPLY
DC Voltmeter B1 (【
【【
【B1】
】】
】
Connector
【
【【
【1】
】】
】pin)
(TP-91)
TP-E(#)
(【
【【
【B1】
】】
】
Connector
【
【【
【3】
】】
】pin)
1. Receive a black-and-white signal. (Color off)
2. Connect the DC Voltmeter to【B1】connector【1】pin (TP-91)
and TP-E(#) (B1 connector【3】pin).
3. Confirm that the voltage is DC134V±2V.
ADJUSTMENT OF IF. VCO
Item Measuring
instrument Test point Adjustment part Description
IF VCO
adjustment Signal
generator CW TRANSF. (T131)
[VCO(CW)] MODE
"Under normal conditions, no adjustment is required.
1. Receive a NTSC aerial broadcast.
2. Select the VCO (CW) mode from the SERVICE MENU.
3. Confirm that the color change from「HIGH LEVEL」to「LOW
LEVEL」by CW transf. and check the「SYNC : YES」.
4. Adjust until「REFERENCE LEVEL」mark turns yellow.
and then confirm that the「SYNC : YES」again.
ADJUSTMENT OF RF AGC
Item Measuring
instrument Test point Adjustment part Description
RF. AGC
adjustment No.19 RF AGC 1. Receive a broadcast.
2. Select “No.19 RF AGC” of the PICTURE MODE.
3. Press the MUTE key and turn off color.
4. With the MENU LEFT key, get noise in the screen picture. (0
side of setting value)
5. Press the MENU RIGHT key and stop when noise disappears
from the screen.
6. Change to other channels and make sure that there Is no
irregularity.
7. Press the MUTE key and get color out.
ADJUSTMENT OF FOCUS
Item Measuring
instrument Test point Adjustment part Description
FOCUS
adjustment Signal
generator FOCUS VR
[In HVT] 1. Receive a crosshatch signal.
2. While looking at the screen, adjust FOCUS VR so that the
vertical and horizontal lines will be clear and in fine detail.
3. Make sure that the picture is in focus even when the screen
gets darkened.
HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL
SYNC : YES
YELLOW