JVC AV-32220/G User manual

No.51782
Jan. 2001
A
V-32220
1COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD. Jan. 2001
AV-32220/G
AV-32220/H
AV-32220/M
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･
･･
･2
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････････････････････････
･･････････････････････････････････････････････････････
･･･････････････････････････3
!FEATURES････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････
･･････････････
･･･････4
!MAIN DIFFERENCE LIST････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････････････････････････
･･････････････････････････････････････････････････････
･･･････････････････････････4
!HOW TO IDENTIFY MODELS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････････････････････
･･････････････････････････････････････････････
･･･････････････････････4
!FUNCTIONS････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･････
････････････
･･････5
!SPECIFIC SERVICE INSTRUCTIONS････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････
･･････････････････････････････････
･････････････････6
!SERVICE ADJUSTMENTS････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････
････････････････････････････････････････････････
････････････････････････ 13
!PARTS LIST････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････
････････
････ 31
★OPERATING INSTRUCTIONS
★STANDARD CIRCUIT DIAGRAM ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･････････････････
････････････････････････････････････
･･････････････････ 2-1
SERVICE MANUAL
COLOR TELEVISION
BASIC CHASSIS
GF3

No.51782
A
V-32220
2
SPECIFICATIONS
Items Contents
Dimensions (W×
××
×H×
××
×D) 30-1/4”×26-1/4”×21-1/2” inch / (768mm×667mm×547mm)
Mass 112.2lbs (51.0kg)
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
(02～06, A-8) by (02～06&01)
(07～13) by (07～13)
(A～1) by (14～22)
(J～W) by (23～36)
(W+1～W+28) by (37～64)
(W+29～W+84) by (65～125)
(A8, A4～A1) by (01, 96～99)
TV/CATV Total Channel 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 / 1.8A
Picture Tube 32” (80cm) measured diagonally, Full Square
High Voltage 31.0kV±1.3kV (at zero beam current)
Speaker 2”×4-3/4” / 5×12cm Oblong type×2
Audio Power Output 3W+3W
INPUT
S-Video Y : 1Vp-p positive (negative sync provided, when terminated with 75Ω)
C : 0.286Vp-p (burst signal, when terminated with 75Ω)
Video 1Vp-p 75Ω(RCApin jack)
Audio 500mVrms (-4dBs), High Impedance (RCA pin jack)
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-C306-1A (AA/R6/UM-3 battery×2)
Design & specifications are subject to change without notice.
(54MHz
～804MHz)

No. 51782
A
V-32220
3
SAFETY PRECAUTIONS
1. The design of this product contains special hardware, many
circuits and components specially for safety purposes. For
continued protection, no changes should be made to the
original design unless authorized in writing by the manufacturer.
Replacement parts must be identical to those used in the
original circuits. Service should be performed by qualified
personnel only.
2. Alterations of the design or circuitry of the products should not
be made. Any design alterations or additions will void the
manufacturer's warranty and will further relieve the
manufacturer of responsibility for personal injury or property
damage resulting therefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using
replacement components rated for higher voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in the parts list of Service manual.
Electrical components having such features are identified
by shading on the schematics and by (!
!!
!) on the parts list
in Service manual. The use of a substitute replacement which
does not have the same safety characteristics as the
recommended replacement part shown in the parts list of
Service manual may cause shock, fire, or other hazards.
4. 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, 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
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 a fast
operating fuse, the
letters indicated below
show the rating.
POWER CORD
REPLACEMENT WARNING.
Connecting the white line side of power
cord to “WHT” character side.

No. 51782
A
V-32220
4
FEATURES
"New chassis design enables use of a main board with
simplified circuitry.
"Digital comb filter Improved picture quality.
"Full-square CRT (cathode ray tube) reproduces fine textured
picture in every detail.
"Closed-caption broadcasts can be viewed.
"With AUDIO. VIDEO INPUT terminal.
"I
2C bus control utilizes single chip ICs.
"S-VIDEO input terminal for taking best advantage of Super
VHS.
"Variable / Fix audio output terminal.
"With AV COMPU LINK EX terminal.
MAIN DIFFERENCE LIST
!Model
Part name AV-32220/G AV-32220/H AV-32220/M
MAIN PWB SGF-1017A-M2 SGF-1002A-M2 SGF-1003A-M2
!PICTURE TUBE A80QCF240X14L A80LJF30X08(G) M80JUA061X06
!DEG.COIL QQW0086-001 CELD066-002JA ←
HOW TO IDENTIFY MODELS
The difference between AV-32220/G, AV-32220/H and AV-32220/M is in the PICTURE TUBE.
As the result of the difference in PICTURE TUBE, the MAIN PWB also differ.
!MODEL
Parts name AV-32220/G AV-32220/H AV-32220/M
!RATING LABEL LC31139-001A-A
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INDICATED AV-32220 INDICATED AV-32220 INDICATED AV-32220
INDICATED“
““
“G”
””
”INDICATED“
““
“H”
””
”INDICATED“
““
“M”
””
”

No. 51782
A
V-32220
5
FUNCTIONS
REMOTE CONTROL UNIT
REAR PANEL
①INPUT 2(V, L, R)
②MENU CONTROL KEY
③CHANNEL UP/DOWN KEYS
④VOLUME UP/DOWN KEYS
⑤POWER BUTTON
⑥ON TIMER LAMP
⑦REMOCON WINDOW
FRONT PANEL
① ② ⑤④ ⑥ ⑦
①
②
③
④
⑤
⑥
⑦
⑧
⑩
⑭
⑨
⑪
⑫
⑬
①POWER BUTTON
②INPUT SELECT KEY
③CHANNEL KEYS
④VIDEO STATUS KEY
⑤DISPLAY KEY
⑥SLEEP TIMER KEY
⑦HYPER SURROUND KEY
⑧MUTING KEY
⑨V-CHIP KEY
⑩MENU KEY
⑪EXIT KEY
⑫VOLUME UP/DOWN KEYS
⑬CHANNEL UP/DOWN KEYS
⑭VCR CONTROL KEYS
①INPUT 1(S, V, L, R)
②INPUT 2(V, L, R)
③AUDIO OUTPUT
④AV COMPULINK EX JACK
⑤AERIAL SOCKET
①
②
③
④
⑤
③

No. 51782
A
V-32220
6
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
"Unplug the power supply cord.
1. Remove the 11 screws marked A
AA
Aas 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 2 claws under the both sides of the chassis from the front
cabinet.
2. Draw the chassis backward along the rail in the arrow direction
marked B
BB
Bas shown in the Fig.2.
(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. Remove the 3 screws marked C
CC
Cas shown in Fig.2.
2. After removing the claw marked E
EE
Ein the direction of arrow
mark as shown in Fig.1.
3. When you pull out the TERMINAL BOARD in the direction of
arrow marked F
FF
Fas shown in Fig.1, it can be removed.
REMOVING THE FRONT CONTROL PW BOARD
"After removing the rear cover and chassis.
1. Remove the 2 screws marked D
DD
Das shown in Fig.2.
2. Then remove the FRONT CONTROL PWB.
REMOVING THE SPEAKER
"After removing the rear cover and chassis.
1. Remove the 2 screws marked G
GG
Gas shown in Fig.2.
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
F
E

No. 51782
A
V-32220
7
TUNER
CLAW
CLAW
Fig.2
A
MAIN PWB
CRT SOCKET
PWB
FRONT CABINET
TERMINAL
BOARD
FRONT
CONTROL
PWB
CHASSIS BASE
REAR COVER
POWER CORD
SPEAKER
PICTURE TUBE
SPEAKER
AV SELECTOR
PWB
FRONT JACK
PWB
G
D
GB
C

No. 51782
A
V-32220
8
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. 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
Fig. 3

No.51782
A
V-32220
9
SYSTEM BLOCK DIAGRAM
IC701
MAIN MICON
IC702
MEMORY
IF
Remote
control
unit
IC601
MTS, TONE
SURROUND CONTROL
IC201
1 CHIP
CONTROL
TU001
TUNER
AFC
SDA1SCL1
SDA3SCL3

No.51782
A
V-32220
10
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. 51782
A
V-32220
11
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 adjustment
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
LOW LIGHT HIGH LIGHT
RF AFC
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. 51782
A
V-32220
12
TABLE 1 (System Constant setting)
Setting item Setting constant Setting value
MODEL Display the each application model Comformable model name
CCD YES NO YES
BBE YES NO NO
V-CHIP YES NO YES
CAN V-CHIP YES NO YES
TABLE 2 (User setting)
Setting item Setting value Setting item Setting value
1. Use remote controller keys
POWER
CHANNEL
VOLUME
TV/VIDEO
HYPER SURROUND
OFF
CH-02
Proper sound volume
TV
OFF
DISPLAY
VIDEO STATUS
SLEEP TIMER
OFF
STANDARD
0
2. Settings of MENU with remote control keys
PICTURE ADJUST
TINT
COLOR
PICTURE
BRIGHT
DETAIL
NOISE MUTING
SET VIDEO STATUS
SOUND ADJUST
BASS
TREBLE
BALANCE
MTS
CLOCK / TIMERS
SET CLOCK
ON/OFF TIMER
CENTER
CENTER
CENTER
CENTER
CENTER
ON
ALL CENTER
CENTER
CENTER
CENTER
STEREO
Unnecessary to set
NO
INITIAL SETUP
TV SPEAKER
AUDIO OUT
LANGUAGE
CLOSED CAPTION
AUTO TUNER SET UP
CHANNEL SUMMARY
SET LOCK CODE
ON
FIX
ENG
OFF
TUNER MODE : AIR
Unnecessary to set
Unnecessary to set

No. 51782
A
V-32220
13
SERVICE ADJUSTMENT
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.
"
""
"User mode setting position
(1) VIDEO STATUS STANDARD
(2) HYPER SURROUND OFF
(3) BASS, TREBLE, BALANCE CENTER
(4) TINT, COLOR, PICTURE, BRIGHT, DETAIL 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
ADJUSTMENT ITEMS
●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
●MTS circuit adjustment
INPUT LEVEL check
STEREO VCO adjustment
SAP VCO adjustment
FILTER check
SEPARATION adjustment

No. 51782
A
V-32220
14
ADJUSTMENT LOCATIONS
MAIN PWB ASS'Y
IC701
(
CPU
)
T161
CN001
FM DET
F901(5A)
PW
DEG.
D
TUNER
AV SELECTOR
PWB
TP-E
( )
B1
(TP-91)
B1
1
3
HV
E1
CRT EARTH
(BRAIDED ASS'Y)
U
HVT
HVTHVT
HVT
V CENTER SW
IC702
S
T
T131
CW
UPPER : FOCUS
LOWER : SCREEN
MPX
S421
IC201
H.WIDTH
SIDEPIN
CORRECT
X13
memor
y
IC
CRT SOCKET PWB ASS'Y
(SOLDER SIDE)
TP-E( )
T
CRT EARTH
(BRAIDED ASS'Y)
TP-R
U
E2
TP-B
FRONT
FRONT CONTROL PWB ASS'Y
POWER MENUVOL CH
IC841
D-
+-
+
TOP FRONT
FRONT JACK PWB ASS'Y
J001
F
FRONT

No. 51782
A
V-32220
15
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.
"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 ･････････････････････ This is used when the RF AFC 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
●LOW LIGHT ●HIGH LIGHT
●RF AFC
●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.
"THEATER, LOW LIGHT, HIGH LIGHT, RF AFC, VCO (CW) and I2C BUS CTRL mode
1) If select any of THEATER / LOW LIGHT / HIGH LIGHT / RF AFC / VCO (CW) / I2C BUS CTRL items, and the LEFT / RIGHT key
is pressed from SERVICE MENU ( MAIN MENU ), the screens 6 7 8 ⑨⑩⑪will be displayed as shown in figure page
later.
2) Then the settings or verifications can be performed.
SERVICE MENU (MAIN MENU)
SERVICE MENU
PICTURE SOUND
THEATER OTHERS
LOW LIGHT HIGH LIGHT
RF AFC
VCO
(
CW
)
I2C BUS CTRL
SELECT BY
OPERATE BY EXIT BY
EX
IT

No. 51782
A
V-32220
16
SERVICE MENU
PICTURE SOUND
THEATER OTHERS
LOW LIGHT HIGH LIGHT
RF AFC
VCO
(
CW
)
I2C BUS CTRL
SELECT BY
OPERATE 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 ON
FINE
***
STATUS
********
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
⑥
⑥⑥
⑥
THEATER MODE
⑦
⑦⑦
⑦
LOW LIGHT MODE
⑧
⑧⑧
⑧
HIGH LIGHT MODE
⑨
⑨⑨
⑨
RF AFC MODE
[DO NOT ADJUST]
1. ATTENUATOR
STATUS
***
********
1. OSD POS.
***
I2C BUS ON
SELECT BY
OPERATE BY
EX
IT
EXIT BY
②
②②
②
SCREEN
③
③③
③
PICTURE MODE
1. BRIGHT
STATUS
***
********
HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL
SYNC : YES
⑩
⑩⑩
⑩
VCO (CW) MODE
⑪
⑪⑪
⑪
I2C BUS CTRL MODE
[FIXED ON]

No. 51782
A
V-32220
17
(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.
1. OSD POS.
***
OTHERSMODE
1. ATTENUATOR
STATUS
***
********
SOUNDMODE
1. BRIGHT
STATUS
***
********
PICTURE MODE INITIAL
SETTING VALUE
↓(Adjust)
SETTING VALUE
SETTING
ITEM
TINT
COLOR
PICTURE
BRIGHT
DETAIL
SELECT BY
OPERATE BY EXIT BY
G DRIVE
B DRIVE
R CUT.
G CUT.
B CUT.
***
***
***
***
***
***
***
***
***
***
EX
IT
THEATERMODE
The letters of the selected
items are displayed in
yellow.

No. 51782
A
V-32220
18
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.
No. Setting (Adjustment) item Variable range Initial setting value (ALL MODEL)
1. BRIGHT 000～127 064
2. PICTURE 000～127 090
3. WPS (WHITE PEAK SUPPRESSOR) 000 / 001 001
4. TV DETAIL 000～063 040
5. TV BPF (TV B.P.FILTER) 000 / 001 001
6. TINT 000～127 074
7. COLOR 000～127 053
8. EXT BRIGHT ±025 (+001)
9. EXT PICT. ±025 (±000)
10. EXT DETAIL 000～063 038
11. EXT BPF (EXT B.P.FILTER) 000 / 001 001
12. EXT TINT ±025 (+007)
13. EXT COLOR ±025 (+005)
14. V SIZE 000～063 028
15. V CENTER 000～007 000
16. H POSITION 000～031 022
17. H AFC 000 / 001 000
18. BLANKING 000 / 001 000
19. RF AGC 000～063 050
20. PIF VCO 000～127 064
"SOUND MODE
No. Setting (Adjustment) item Variable range Initial setting value (ALL MODEL)
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. 51782
A
V-32220
19
"THEATER MODE
Setting (Adjustment) item Variable range Initial setting value (ALL MODEL)
TINT -20～+20 ±00
COLOR -20～+20 -02
PICTURE -30～+20 -15
BRIGHT -20～+20 ±00
DETAIL -15～+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
No. Setting (Adjustment) item Variable range Initial setting value (ALL MODEL)
1. OSD POS. 000～007 000
2. CCD POS.
(CLOSED CAPTION DECODER POS.) 000～015 006
3. EOSEL 000 / 001 000
4. F1 FIELD 000 / 001 000
5. F1 LINE21 000～015 008
6. F2 LINE21 000～015 008
7. OSD STABI 000 / 001 000
8. SYNC SEP. 000 / 001 001
9. MENU COLOR -030～±000 -010
10. MENU PICT -030～±000 -012
11. MENU BRI -030～±000 -012
12. TU1 FM TRAP 000 / 001 000
13. TU2 FM TRAP 000 / 001 000
"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 MODE
Setting (Adjustment) item Variable range Initial setting value
RF AFC 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
ADJUST
DO NOT
A
DJUST

No. 51782
A
V-32220
20
■
■■
■ADJUSTMENT
B1 POWER SUPPLY
Item Measuring
instrument Test point Adjustment part Description
Check of
B1 POWER
SUPPLY
DC Voltmeter B1 (【
【【
【B1】
】】
】
Connector
①
①①
①pin)
(TP-91)
TP-E(#)
(【
【【
【B1】
】】
】
Connector
③
③③
③pin)
1. Receive a black-and-white signal. (Color off)
2. Connect the DC Voltmeter to【B1】connector ①pin (TP-91)
and TP-E(#) (B1 connector ③pin).
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.
[VCO(CW)] MODE
"Under normal conditions, no adjustment is required.
1. Receive a NTSC aer. broadcast.
2. Select the VCO (CW) mode from the SERVICE MENU.
3. Confirm the color change (yellow) from 「HIGH LEVEL」to
「LOW LEVEL」by CW TRANSF. and “SYNC : YES”being
shown on the screen. Then, adjust CW TRANSF. until
「REFERENCE LEVEL」mark turns yellow and confirm again
“SYNC : YES”being shown on the screen.
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 MUTING 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 MUTING key and get color out.
ADJUSTMENT OF FOCUS
Item Measuring
instrument Test point Adjustment part Description
FOCUS
adjustment Signal
generator FOCUS VR
[In HVT] "SET VIDEO STATUS to “STANDARD”
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.
Note :
The final adjustment of convergence must be done after the
FOCUS adjustment. (Convergence is changed by FOCUS
adjustment.)
When makes difference by FOCUS adjustment, should be
reconfirming purity adjustment.
HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL
SYNC : YES
YELLOW