JVC AV 32120 User manual

No.51696
Oct. 2001
AV-32120
AV-32115
1COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
AV-32120(B US)
AV-32115(B US)
Since the PICTURE TUBE was changed, we have issued the SERVICE MANUAL for AV-32120 (B US) &
AV-32115 (B US). The parts, which have been changed, are listed in the PARTS DIFFERENCE TABLE. For
the parts not listed in the table, please refer to the SERVICE MANUAL for AV-27GFH/ (US) & AV-27GFHZ)
(No.51806, Jun. 2001).
HOW TO IDENTIFY MODEL
For model AV-32120 (B US)＆
＆＆
＆AV-32115 (B US), the Suffix “B” is added to the serial No. on the rating label.
RATING LABEL
INDICATED“B”
BASIC CHASSIS
GF
SERVICE MANUAL
COLOR TELEVISION
AV-XXXXX

No. 51696B
AV-32120
AV-32115
2
PARTS DIFFERENCE TABLE [ AV-32120(US)&AV-32120(B US) ]
EXPLODED VIEW PARTS LIST (Page 36)
PARTS No.
!REF.No. AV-32120(US) AV-32120(B US) PARTS NAME DESCRIPTION
!V01 A80LJF30X08(G) A80QCF240X14L I.T.C. TUBE(C) (INC. DY ,PC ,WED)
!L01 CELD066-002JA QQW0086-001 DEGAUSSING COIL
PRINTED WIRING BOARD PARTS LIST (Page38～
～～
～41)
PARTS No.
!SYMBOL
No. AV-32120(US) AV-32120(B US) PARTS NAME DESCRIPTION
SGF-1002A-M2 SGF-1017A-M2 MAIN P.W.B
!
!
!
!
!
R1431
R1524
R1525
R1587
R1732
C1531
C1533
C1572
L1531
L1591
Q1531
--------------------
QRG029J-182
QRG029J-152
NRSA02J-332X
NRSA02J-224X
QFZ0196-402
QFP32GJ-223
QFLC1HJ-153Z
QQR1027-003
QQLZ026-430
2SD2539-LB
QRE121J-150Y
QRG029J-102
QRG029J-102
NRSA02J-562X
NRSA02J-474X
QFZ0196-502
QFP32GJ-183
QFLC1HJ-393Z
CE42116-00A
QQLZ026-410
2SD2559-LB
C R
OM R
OM R
MG R
MG R
MPP CAP.
PP CAP
M CAP.
LINE FILTER
HEATER CHOKE
SI.TRANSISTOR
15Ω 1/2W
Addition
1kΩ 2W
1kΩ2W
5.6kΩ1/10W
470kΩ1/10W
5000pF 1.5kVH ±3%
0.018µF 400V
0.039µF 50V
H.OUT

No. 51696B
AV-32120
AV-32115
3
PARTS DIFFERENCE TABLE [ AV-32115(US)&AV-32115(B US) ]
EXPLODED VIEW PARTS LIST (Page 52)
PARTS No.
!REF.No. AV-32115(US) AV-32115(B US) PARTS NAME DESCRIPTION
!V01 A80LJF30X08(G) A80QCF240X14L I.T.C. TUBE(C) (INC. DY ,PC ,WED)
!L01 CELD066-002JA QQW0086-001 DEGAUSSING COIL
PRINTED WIRING BOARD PARTS LIST (Page54～
～～
～57)
PARTS No.
!SYMBOL
No. AV-32115(US) AV-32115(B US) PARTS NAME DESCRIPTION
SGF-1008A-M2 SGF-1018A-M2 MAIN P.W.B
!
!
!
!
!
R1431
R1524
R1525
R1587
R1732
C1531
C1533
C1572
L1531
L1591
Q1531
--------------------
QRG029J-182
QRG029J-152
NRSA02J-332X
NRSA02J-224X
QFZ0196-402
QFP32GJ-223
QFLC1HJ-153Z
QQR1027-003
QQLZ026-430
2SD2539-LB
QRE121J-150Y
QRG029J-102
QRG029J-102
NRSA02J-562X
NRSA02J-474X
QFZ0196-502
QFP32GJ-183
QFLC1HJ-393Z
CE42116-00A
QQLZ026-410
2SD2559-LB
C R
OM R
OM R
MG R
MG R
MPP CAP.
PP CAP
M CAP.
LINE FILTER
HEATER CHOKE
SI.TRANSISTOR
15Ω 1/2W
Addition
1kΩ 2W
1kΩ2W
5.6kΩ1/10W
470kΩ1/10W
5000pF 1.5kVH ±3%
0.018µF 400V
0.039µF 50V
H.OUT

AV32120B-USM(#004)
AV32115B-USM(#999)
40010
MS/MH
JVC CANADA INC.
Head office: 21 Finchdene Square Scarborough, Ontario M1X 1A7 [phone]
Vancouver : 13040 Worster Court Richmond B.C. V6V 2B3 [phone]

JVC SERVICE & ENGINEERING COMPANY OF AMERICA
DIVISION OF JVC AMERICAS CORP.
Head office : 1700 Valley Road, Wayne, New Jersey 07470 [phone]
East Coast : 10 New Maple Avenue, Pine Brook, New Jersey 07058 [phone]
Midwest : 705 Enterprise St. Aurora, Illinois 60504 [phone]
West Coast: 5665 Corporate Avenue, Cypress, California 90630 [phone]
Southwest : 10700 Hammerly, Suite 105, Houston,Texas 77043 [phone]
Hawaii : 2969 Mapunapuna Place, Honolulu, Hawaii 96819 [phone]
Southeast : 1500 Lakes Parkway, Lawrenceville, Georgia 30243 [phone]

No.51806
A
V-27GFH
1COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD. Jun. 2001
AV-27GFH/Z
CONTENTS
!SPECIFICATIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････････････････
･･････････････････････････････････････････････････････････
･････････････････････････････ 2
!SAFETY PRECAUTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･･････････････････････
･･････････････････････････････････････････････
･･･････････････････････ 3
!FEATURES ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･･
････
･･ 4
!SPECIFIC SERVICE INSTRUCTIONS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････
･･････････････････････････
･････････････ 6
!SERVICE ADJUSTMENTS ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････････････････････
･･････････････････････････････････････････
･････････････････････ 15
!PARTS LIST････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･
･･
･33
★
OPERATING INSTRUCTIONS
★
STANDARD CIRCUIT DIAGRAM (APPENDIX) ････････････････････････････････
････････････････････････････････････････････････････････････････
････････････････････････････････ ･････
･･････････
･････ 2-1
BASIC CHASSIS
GF
SERVICE MANUAL
COLOR TELEVISION
(OPTION)

No.51806
A
V-27GFH
2
SPECIFICATIONS
Items Contents
Dimensions (W×
××
×H×
××
×D) 25-3/4”×23-3/8”×20-1/2” (65.4cm×59.1cm×51.8cm)
Mass 79.9Ibs / (36.3kg)
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 181 Channels
Intermediate Frequency
Video IF Carrier
Sound IF Carrier
Color Sub Carrier
45.75 MHz
41.25 MHz (4.5MHz)
3.58 MHz
Power Input 120V AC, 60Hz
Power Consumption 120W / 1.7A
Picture Tube 27” (68cm) measured diagonally, Full Square
High Voltage 29kV±1.3kV (at zero beam current)
Speaker 2”×4-3/4” / 5×12cm oval×2
Audio Power Output 3W+3W
Input (Front & Rear) 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)
Modular Jack Digital Interface for Command box.
Antenna terminal 75Ω(VHF/UHF) Terminal, F-Type Connector
Remote Control Unit (OPTIONAL) RM-C205-1A (AA/R6/UM-3 battery×2)
Design & specifications are subject to change without notice.
(54MHz～804MHz)

No. 51806
A
V-27GFH
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, 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 anyexposed metal part having areturn 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.

No.51806
A
V-27GFH
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.
"With Digital Interface (modular jack) for OCC box.
"Closed-caption broadcasts can be viewed.
"With AUDIO / S-VIDEO / VIDEO INPUT terminal.
"S-VIDEO input terminal for taking best advantage of Super VHS.
"Built-in V-CHIP system.
■
■■
■FRONT PANEL
①REMOTE CONTROL SENSOR
②ON-TIMER INDICATOR
③POWER SWICH BUTTON
④VOLUME(-/+) BUTTON
⑤CH (-/+) & OPERATE( ) BUTTON
⑥MENU / WORLD CLOCK BUTTON
⑦AUDIO-INPUT(R) Terminal
⑧AUDIO-INPUT(L/MONO) Terminal
⑨VIDEO INPUT Terminal
■
■■
■REAR PANEL
①U/V ANT. Terminal
②S-VIDEO INPUT Terminal
③VIDEO INPUT Terminal
④AUDIO(R) INPUT Terminal
⑤AUDIO(L/MONO) INPUT Terminal
⑥DIGITAL INTERFACE Terminal
Modular connector : used to connect
on command box.
FUNCTIONS
A
/V Input Terminal
!
!
!
!
Used to connect audio/video devices like
VCRs, DVD, players, stereo amplifiers,
game consoles, …etc.
/

No.51806
A
V-27GFH
5
■
■■
■REMOTE CONTROL UNIT (OPTIONAL : RM-C205)
①POWER Key
!
!!
!TV ON or OFF.
②INPUT SELECT Key
!
!!
!Selects the Input source for TV.
③DIRECT CH Key
!
!!
!CH. select.
④UP/DOWN CH Key.
!
!!
!CH. select.
⑤VOL(-/+) Key
!
!!
!Vol. level control & setup menu setting.
⑥V-CHIP Key
!
!!
!V-CHIP setting : ON / OFF or BLOCK setting of each RATING.
⑦MENU Key
!
!!
!Press MENU to activate the on screen menu system.
⑧MUTING Key
!
!!
!Instantly turns the Vol. down completely.
⑨DISPLAY Key
!
!!
!Shows the CH. & AV input.
⑩VIDEO STATUS Key
!
!!
!Use this key to enter the SETUP MENU only.
⑪SLEEP TIMER Key
!
!!
!Turn the TV-off for you after you fall sleep.
⑫VCR Control
⑬RETURN+Key
⑭100+Key
!
!!
!Use the 100+ Key to directly access channels.
⑮EXIT Key
!
!!
!To leave a menu screen.

No. 51806
A
V-27GFH
6
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
"Unplug the power supply cord.
1. Remove the 9 screws marked !
!!
!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 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 "
""
"as 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 1 screws marked #
##
#as shown in Fig.2.
2. After removing the claw marked $
$$
$in the direction of arrow
mark as shown in Fig.1.
3. When you pull out the TERMINAL BOARD in the direction of
arrow marked %
%%
%as 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 &
&&
&as 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 '
''
'as 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. 51806
A
V-27GFH
7
B
Fig.2
(×9)
FRONT CABINET
TUNER
CRT SOCKET
PWB
G
GD
CLAW
POWER CORD
CHASSIS
TERMINAL
BOARD
CLAW
REAR COVER
A
V SELECTOR
PWB
FRONT
CONTROL
PWB
MAIN PWB
C
A
FRONT
A
V IN PWB

No. 51806
A
V-27GFH
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. 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.51806
A
V-27GFH
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. 51806
A
V-27GFH
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
(1) Power off
Switch off the power and disconnect the power cord from the wall outlet.
(2) Replace the memory IC
Initial value must be entered into the new IC.
(3) Power on
Connect the power cord to the wall 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
LOW LIGHT HIGH LIGHT
RF AFC
VCO
(
CW
)
I2C BUS CTRL
SELECT BY
OPERATE BY EXIT BY
EX
IT
Fig.1
SYSTEM CONSTANT
CCD : YES
BBE : NO
V-CHIP : YES
CAN V-CHIP : YES
********* ***
********* ************ ***
********* ***
SELECT BY
OPERATE BY EXIT BY
EX
IT
Fig.2
SETTING
VALUE &
SETUP MODE
SERVICE ITEM
DISPLAY Key
MENU ITEM
UP(+) Key
SETTING VALUE
UP(+) Key &
SETUP MODE
SERVICE MENU
EXIT Key
MENU ITEM
DOWN(-) Key
REMOTO CONTROL KEY LOCATION
SERVICE MENU / SETUP MODE
/
SYSTEM CONSTANT
Key
SERVICE
MENU Key

No. 51806
A
V-27GFH
11
TABLE 1 (System Constant setting)
Setting item Setting constant Setting value
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
POWER OFF V-CHIP OFF
DISPLAY OFF SET US or CANADIAN TV RATINGS
CLOSED CAPTION OFF (CC1 / T1) SET MOVIE RATINGS
ALL
CLEAR
SET LOCK CODE Unnecessary to set (0000) UNRATED VIEW

No. 51806
A
V-27GFH
12
SETUP MODE
PRESETTING BEFORE ADJUSTMENT
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
%How to enter the SETUP MODE.
1. Press the VOL+key ( or VOL-key ) and check VOL. on the
screen as shown in Fig.1.
2. Then before disappear press the DISPLAY key and VIDEO
STATUS key at the same time.
3. Following display will be shown in Fig.2.
%How to select SETUP ITEM.
1. Press the
▲/▼key with the remote control unit.
2. Then the L( ) / R( ) key is pressed, the SETUP ITEM
screen setting or verifications can be performed.
3. Press the EXIT key , returns to the previous screen.
VOL.
**
Fig.1
TINT
COLOR
PICTURE
BRIGHT
DETAIL
SELECT BY
OPERATE BY EXIT BY
SETUP MODE
PREVIOUS
NEXT PAGE
EX
IT
Fig.2
SELECT BY
OPERATE BY EXIT BY
TURN ON VOLUME 10
VOLUME LIMIT 50
TV VERSION 00
FIRMWARE VERSION 00
SETUP MODE
NEXT PAGE
EX
IT
EX
IT
PREVIOUS
Fig.4
EX
IT
SELECT BY
OPERATE BY EXIT BY
EX
IT
SETUP MODE
CHANNEL SUMMERY
TUNING BROADCASCABLE
POWER ON CH 02
VIDEO STATUS RESET
PREVIOUS
NEXT PAGE
SELECT BY
OPERATE BY EXIT BY
EX
IT
CHANNEL SUMMY
CHNo. SCAN ID
11
12
13
14
15
CHNo. SCAN ID
16
17
18
19
20
Fig.3

No. 51806
A
V-27GFH
13
INITIAL SETUP ITEM & SETTING DATA
No SET UP ITEM SETTING DATA REMARKS
TINT Center
COLOR ↑
PICTURE ↑
BRIGHT ↑
1
DETAIL ↑
With the VIDEO STATUS RESET in the setup
mode, the CENTER POSITION is reset.
2CHANNEL SUMMARY All Channel Memorized
(A setup is necessary independent Cable TV & AIR.) Refer to channel setting of SETUP MODE.
3TUNING Broadcast Select Air or Cable TV.
4POWER ON CH 02CH Receivable CH at the time when the power is
turned ON.
5TURN ON VOLUME 10 Volume at the time when the power is turned
ON.
6VOLUME LIMIT 50 Max. Volume.
NOTE
"When adjustments have been completed, always return all data to the channel setting of setup mode described below.
"If the setup in 2 & 3 above have not been done properly during adjustments for servicing, no broadcast can be received on the TV.
CHANNEL SETTING OF SETUP MODE
Band CH Display Setting
02
03
04
05
VHFL
06
07
08
09
10
11
12
VHFH
13
Band CH Display Setting
14
36
41
46
63
UHF
69

No. 51806
A
V-27GFH
14
Band CH Display Setting
A14
B15
C16
D17
E18
F19
G20
H21
MID
I22
J23
K24
L25
M26
N27
O28
P29
Q30
R31
S32
T33
U34
V35
SUPER
W36
Band CH Display Setting
A-7 93
A-6 94
A-5 95
A-4 96
A-3 97
A-2 98
A-1 99
SUB MID
A-8 01
W+11 47
W+12 48
W+17 53
W+23 59
HYPER
W+29 65
W+51
W+78
ULTRA
W+84

No. 51806
A
V-27GFH
15
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.
MEASURING INSTRUMENT
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator ( Pattern generator ) [NTSC]
4. Remote control unit ( OPTION )
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. 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. 51806
A
V-27GFH
16
ADJUSTMENT LOCATIONS
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
MAIN PWB
FRONT
MPX
FRONT CONTROL PWB
FRONT
CRT EARTH
(BRAIDED ASS'Y)
TP-R
CRT SOCKET PWB
(SOLDER SIDE)
TOP
T
TP-B
TP-G
E2
TP-E( ) U
D
FM DET
T161
PW
F901
CW
T131
HVT
HVTHVT
HVT
X31
CPU MEMORY
IC
F
FRONT AV IN PWB
FRONT