Page 1
SERVICE MANUAL
COLOR TELEVISION
AV-27F802
BASIC CHASSIS
AC
AV-27F802
TV
/SME
CONTENTS
a SPECIFICATIONS....................................................................................................................................2
a SAFETY PRECAUTIONS ........................................................................................................................3
a FEATURES ..............................................................................................................................................4
a FUNCTIONS.............................................................................................................................................5
a SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................6
a SERVICE ADJUSTMENTS ....................................................................................................................11
¤ ST ANDARD CIRCUIT DIAGRAM (APPENDIX) .................................................................................. 2-1
a P ARTS LIST ...........................................................................................................................................33
COPYRIGHT © 2000 VICTOR COMPANY OF JAPAN, LTD.
No. 51785
Dec. 2000
Page 2
AV-27F802
SPECIFICATIONS
Items Contents
Dimensions (W × H × D)
················································································································································································································
Mass
················································································································································································································
TV RF System
················································································································································································································
Color Sound System
················································································································································································································
TV Receiving Channels and Frequency
VL Band
VH Band
UHF Band
················································································································································································································
CATV Receiving Channels and Frequency
Low Band
High Band
Mid Band
Super Band
Hyper Band
Ultra Band
Sub Mid Band
TV/CATV Total Channel
················································································································································································································
Intermediate Frequency
Video IF Carrier
Sound IF Carrier
Color Sub Carrier
················································································································································································································
Power Input
Power Consumption
················································································································································································································
Picture Tube
High Voltage
················································································································································································································
Speaker
Audio Power Output
················································································································································································································
Video / Audio Input (1 / 2 / 3 / 4)
29-7/8” × 23-3/8” × 19-3/4” / 75.8cm × 59.3cm × 50.0cm
101.2 lbs / 46 kg
CCIR(M)
NTSC, BTSC System (Multi Channel Sound)
(02
~06) 54MHz~88MHz
(07
~13) 174MHz~216MHz
(14
~69) 470MHz~806MHz
~06, A-8) by (02~06&01)
(02
(07
~13) by (07~13)
(A
~1) by (14~22)
(J
~W) by (23~36) (54MHz~804MHz)
(W+1
~W+28) by (37~64)
(W+29
~W+84) by (65~125)
(A8, A4
~A1) by (01, 96~99)
180 Channels
45.75MHz
41.25MHz (4.5MHz)
3.58MHz
120V AC, 60Hz
140W / 2.0A
27” (68cm) Measured Diagonally
30kV±1kV (at zero beam current)
2” × 4-3/4” / 5 × 12cm Oval type × 2
5W × 2
Video(1,3,4) : 1Vp-p, 75Ø (RCA pin jack)
Audio(1,2,3,4) : 500mVrms ( -4dBs ), High Impedance (RCA pin jack)
S-Video ( Input 1 / 3 / 4 Over )
Y : 1Vp-p Positive (negative sync provided, when terminated with 75Ø)
C : 0.286Vp-p (burst signal, when terminated with 75Ø)
Component Input ( Input 2 / 4 )
Y : 1Vp-p positive (negative sync provided, when terminated with 75Ø)
P
B/PR : 0.7Vp-p 75 Ø
—
—
················································································································································································································
Audio Output
(Variable / Fix : Selectable)
················································································································································································································
AV Compu link EX Input
················································································································································································································
Antenna terminal
················································································································································································································
Remote Control Unit
Variable : More then 0
Low impedance (400Hz when modulated 100%)
Fix : 500mVrms(-4dBs)
Low impedance (400Hz when modulated 100%)
3.5mm mini jack
75Ø(VHF/UHF) Terminal, F-Type Connector
RM-C301G-2A
(AA/R6/UM-3 battery × 2)
~1550mVrms (+6dBs)
(RCA pin jack)
(RCA pin jack)
Design & specifications are subject to change without notice.
2 No. 51785
Page 3
GOOD
EARTH
GROUND
0.15 µF AC-TYPE
AC VOLTMETER
(HAVING 1000Ø/V,
OR MORE SENSITIVITY)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500Ø 10W
A V
This mark shows a fast
POWER CORD
REPLACEMENT WARNING
Connecting thr white line side of
power cord to “WHT” character side.
operating fuse, the
letters indicated below
show the rating.
PWB
WHT
PW
White line side
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 (
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 (NEU-
TRAL) 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 : (
ISOLATED(NEUTRAL) : (
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 10kØ 2W 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.
) side GND and EARTH : ( ) side
) on the
) side GND, the
No. 51785 3
AV-27F802
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 1500Ø 10W 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.).
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”.
Page 4
AV-27F802
FEATURES
Full-flat CRT (cathode ray tube) reproduces fine textured picture in
•
every detail.
I2C bus control utilizes single chip ICs.
•
Built in Twin Tuner system.
•
Built-in HYPER-SURROUND system.
•
Built-in BBE.
•
Adoption of the Picture-In-Picture (PIP) function.
•
3 LINE Digital Y/C Separation circuit improved picture quality.
•
a SYSTEM BLOCK DIAGRAM
IC702
E2PROM 4k bit
SCL 1 SDA 1
Component input terminal for talking best advantage of Component
•
Video Signal.
Audio Video input terminal. (S-input ×2, V-input ×2)
•
Variable/Fix audio output terminal.
•
Closed-caption broadcasts can be viewed.
•
With AV COMPU LINK EX terminal.
•
IF2
AFC 2
Remote
control
unit
IC301
PIP
CONTROL
SCL 0 SDA 0
IC701
MAIN MICON
IC101
1 CHIP
CONTROL
IC501
AVSW
CONTROL
AFC 1
TU001
TUNER 1
TU001
TUNER 2
IC001
MTS, TONE
SURROUND CONTROL
4 No. 51785
3-D Y/C
Page 5
FUNCTIONS
a FRONT P ANEL
AV-27F802
a FRONT PANEL DOOR OPENED
a REAR P ANEL
a REMOTE CONTROL UNIT
(RM-C301G-2A)
No. 51785 5
Page 6
AV-27F802
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power supply cord.
2. Remove the 12 screws marked A as shown in Fig.1.
3. Withdraw the REAR COVER toward you.
[CAUTION]
When reinstalling the rear cover, carefully push it inward after in-
•
serting the MAIN PWB 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
3 claws marked B under the chassis from the front cabinet as
shown in Fig.1.
2. Withdraw the chassis backward along the rail in the arrow direction
marked C as shown in Fig.1.
(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 6 screws marked D as shown in Fig.1.
2. When you pull out the TERMINAL BOARD in the direction of arrow
marked E as shown in Fig.1, it can be removed.
REMOVING THE DAF PW BOARD
After removing the rear cover and chassis.
•
1. Lift the right side of the DAF PWB while pressing the PWB stopper
marked J and claw marked K in the arrow direction marked L as
shown in Fig.1.
2. Then remove the DAF PWB.
(If necessary, take off the wire, connector’s etc.)
REMOVING THE SPEAKER
After removing the rear cover.
•
1. Remove the 4 screws marked M as shown in Fig.1.
2. Withdraw the speaker backward.
3. Follow the same steps when removing the other hand speaker.
CHECKING THE MAIN PW BOARD
1. To check the back side 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 back
side of the MAIN PW Board.
[CAUTION]
When erecting the chassis, be careful so that there will be no con-
•
tacting with other PW Board.
Before turning on power, make sure that the CRT earth wire and
•
other connectors are properly connected.
REMOVING THE FRONT AND POWER SW PW BOARDS
After removing the rear cover and chassis.
•
1. Remove the 4 screws marked F as shown in Fig.1.
2. Then remove the FRONT PWB and POWER SW PWB.
(If necessary, take off the wire, connector’s etc.)
REMOVING THE LF PW BOARD
After removing the rear cover and chassis.
•
1. Lift the left side of the LF PWB while pressing the 2 PWB stoppers
marked G in the arrow direction marked H as shown in Fig.1.
2. Then remove the LF PWB.
(If necessary, take off the wire, connector’s etc.)
WIRE CLAMPING AND CABLE TYING
1. Be sure 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.
6 No. 51785
Page 7
D
F
M
A
DAF PWB
PWB STOPPER
PWB
STOPPER
PWB
STOPPER
CLAW
SPEAKER
CHASSIS
MAIN PWB
LF PWB
POWER SW PWB
REAR COVER
FRONT PWB
CRT SOCKET PWB
FRONT CABINET
(x12)
(x6)
(x4)
(x4)
E
L
H
C
K
CLAW
CLAW
B
B
G
G
J
AV-27F802
Fig.1
No. 51785 7
Page 8
AV-27F802
MEMORY IC REPLACEMENT
1. Memory IC
This model use 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
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.
SERVICE MENU
PICTURE SOUND
THEATER OTHERS
PIP 3-D Y/C
LOW LIGHT HIGH LIGHT
RF AFC1 RF AFC2
VCO(CW) I2C BUS CTRL
SELECT BY
OPERATE BY
Fig.1
SYSTEM CONSTANT
MODEL :99–
TM CORR. : NO
CCD : YES
V-CHIP : YES
CAN V-CHIP : NO
EXIT BY
99999
999999999 999
SELECT BY
OPERATE BY
Fig.2
EXIT BY
EX
IT
EX
IT
(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.
8 No. 51785
Page 9
AV-27F802
TABLE 1 (System Constant setting)
Setting item Setting content Setting value
AV-27F802 AV-32F802 AV-36F802 AV-27F702
MODEL
AV-32D602 AV-27D602 AV-36F702 AV-32F702
AV-36D602 AV-27D502 AV-32D502 AV-36D502
AV-36D202 AV-32D202 AV-36D302 AV-32D302
AV-27F802
TM CORR.
CCD
V-CHIP
CAN V-CHIP
YES NO
YES NO
YES NO
YES NO
TABLE 2 (User setting value)
Setting item Setting value
1. Use remote controller keys
POWER NO
CHANNEL CH-02
VOLUMEN 05
INPUT TV
HYPER SURROUND NO
BBE SI
DISPLAY NO
SLEEP TIMER 0
VIDEO STATUS MEMORIA
PIP SOURCE CH-04
PIP ON (PIP POSITION) LEFT LOWR SIDE
2. Setting of MENU
NO
YES
YES
NO
AJUSTAR IMAGEN
TINTE CENTER
COLOR CENTER
CONTRASTE CENTER
BRILLO CENTER
DETALLE CENTER
PANTALLA AZUL SI
FIJAR VIDEO STATUS ALL CENTER
AJUSTAR SONIDO
GRAVES CENTER
AGUDOS CENTER
BALANCE CENTER
MTS ESTEREO
RELOJ/REGULADOR
AJUSTE DEL RELOJ Unnecessary to set
TEMPORIZADOR SI
SISTEMA INICIAL
ALTAVOCES SI
SALIDA AUDIO FIJO
V4 COMPONENT-IN SI
IDIOMA ESP
SUBTITULOS OCULTOS NO
AUTOPROGRAMACION Unnecessary to set
LISTA DE CANALES Unnecessary to set
V-CHIP NO
BLOQUEO DE CANAL Unnecessary to set
No. 51785 9
Page 10
AV-27F802
REPLACEMENT OF CHIP COMPONENT
CAUTIONS
a
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
a
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
a
1. How to remove Chip parts
Resistors, capacitors, etc.
(1) As shown in the figure, push the part with tweezers and alter-
nately melt the solder at each end.
2. How to install Chip parts
Resistors, capacitors, etc.
(1) Apply solder to the pattern as indicated in the figure.
(2) Shift with tweezers and remove the chip part.
Transistors, diodes, variable resistors, etc.
(1) Apply extra solder to each lead.
SOLDER
(2) As shown in the figure, push the part with tweezers and alter-
nately melt the solder at each lead. Shift and remove the chip
part.
SOLDER
(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.
T ransistors, 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
(4) Then solder leads
A as indicated in the figure.
A
B
C
B and C.
A
Note : After removing the part, remove remaining solder from the
pattern.
10 No. 51785
B
C
Page 11
AV-27F802
SERVICE ADJUSTMENTS
ADJUSTMENT PREP ARATION:
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, capacitors, 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
•
VIDEO STATUS STANDARD
HYPER SURROUND OFF
BASS, TREBLE, BALANCE CENTER
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
7. Resistor (1MØ)
ADJUSTMENT ITEMS
Check of B1 POWER SUPPLY
•
RF AGC adjustment
•
FOCUS adjustment
•
WHITE BALANCE adjustment
•
WHITE BALANCE (Low Light) adjustment
WHITE BALANCE (High Light) adjustment
PIP HIGH LIGHT WHITE BALANCE Adjustment
BRIGHT adjustment
•
SUB BRIGHT adjustment
CONTRAST adjustment
•
SUB CONTRAST adjustment
DEFLECTION adjustment
•
V.CENTER and TRAPEZIUM adjustment
V-SIZE and V-LINEARITY adjustment
H SIZE and H POSITION adjustment
SIDE PIN and CORNER PIN adjustment
PIP DISPLAY POSITION adjustment
CHROMA adjustment
•
SUB COLOR adjustment
SUB TINT adjustment
MTS circuit adjustment
•
INPUT LEVEL check
STEREO VCO adjustment
SAP VCO adjustment
FILTER check
SEPARATION adjustment
No. 51785 11
Page 12
AV-27F802
ADJUSTMENT LOCATIONS
FRONT
LINE FILTER
PWB
P
E3
F901
125V 5A
E1
PW
MAIN PWB
CN006
SS
CN002 CN001
POWER SW PWB FRONT PWB
MPX
S706
B CN007
E1
C
D101
S701
CN007
IC701 CPU
3D Y/C MODULE PWB
CN004
CN003
J601
J602
IC101
IC702
R027
S705 S703
P
K
S1
S702S704
CN005
FRONT
S702 : MENU
S703 : CHANNEL–
CN006B
DEG
S704 : CHANNEL+
S705 : VOLUME–
S706 : VOLUME+
FRONT
DAF PWB
Q
K
Q511
Heatsink
HV
CP
Q
R507
DAF
FRONT
DAFCP
AV SW PWB
J501
J502
FRONT
TOP
CN001
CN002
J504 J503
TU001
TU001
PIP PWB
TU001
FRONT
TOP
CN003
UPPER : H
MIDDLE : FOCUS
LOWER : SCREEN
CRT SOCKET PWB
TP-G
CN004
(SOLDER SIDE)
TP-E1
CN005
TOP
E2
12 No. 51785
Page 13
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 sets the setting values (adjustment values) of the VIDEO/CHROMA and DEFLECTION circuits.
•
SOUND.................................. This sets 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 adjustment.
•
PIP ......................................... This sets the setting values (adjustment values) of the PIP circuit.
•
3-D Y/C .................................. This sets the setting values (adjustment values) of the 3-D Y/C circuit.
•
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 AFC1................................ This is used when the RF AFC1 MODE is verified. [Do not adjust]
•
RF AFC2................................ This is used when the RF AFC2 MODE is verified. [Do not adjust]
•
VCO (CW).............................. This is not used for service.
•
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
shown in the next figure page.
1
AV-27F802
(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
•
THEATER
•
PIP
•
LOW LIGHT
•
RF AFC1
•
VCO(CW)
•
(3) Enter the any setting ( adjustment ) mode
PICTURE, SOUND, OTHERS and 3-D Y/C mode
•
1) If select any of PICTURE, SOUND, OTHERS or 3-D Y/C items, and the LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN
MENU ), the screen 2 will be displayed as shown in figure page later.
2) Then the UP / DOWN key is pressed, the PICTURE mode screen 3 or the SOUND mode screen 4 or the OTHER mode screen 5 or
the 3-D Y/C mode screen 6 is displayed, and the PICTURE, SOUND, OTHERS or 3-D Y/C 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 7 will be displayed as shown
in figure page later.
2) Then the UP/DOWN key is pressed, the PIP mode screen 8 is displayed, and the PIP setting can be performed.
THEA TER, LOW LIGHT, HIGH LIGHT, RF AFC1, RF AFC2, VCO(CW) and I2C BUS CTRL mode
•
1) If select any of THEA TER / LOW LIGHT / HIGH LIGHT / RF AFC1 / RF AFC2 / VCO (CW) / I2C BUS CTRL items, and the LEFT / RIGHT
key is pressed from SERVICE MENU ( MAIN MENU ), the screens 9 10 1 1 12 13 14 15 will be displayed as shown in figure page later .
2) Then the settings or verifications can be performed.
SOUND
•
OTHERS
•
3-D Y/C
•
HIGH LIGHT
•
RF AFC2
•
I2C BUS CTRL
•
No. 51785 13
Page 14
AV-27F802
1
SERVICE MENU (MAIN MENU) SCREEN PICTURE MODE
SERVICE MENU
PICTURE SOUND
THEATER OTHERS
PIP 3-D Y/C
LOW LIGHT HIGH LIGHT
RF AFC1 RF AFC2
VCO(CW) I2C BUS CTRL
SELECT BY
OPERATE BY
11
HIGH LIGHT MODE
HIGH LIGHT
999 999
12
RF AFC1 MODE
EXIT BY
EX
IT
[DO NOT ADJUST]
TOO HIGH GOOD TOO LOW
RF AFC1 ON
FINE
SELECT BY
OPERATE BY
EXIT BY
999
EX
IT
2
SELECT BY
4
SOUND MODE OTHERS MODE 3-D Y/C MODE
1. NOISE DET.
STATUS
7
SCREEN PIP MODE
SELECT BY
EXIT BY
999
99999999
EXIT BY
EX
IT
EX
IT
3
1. BRIGHT
STATUS
5
1. OSD POS. 999
8
1. PIP BR
STATUS
999
99999999
999
99999999
1. YC 001
STATUS
6
999
99999999
13
RF AFC2 MODE
[DO NOT ADJUST]
TOO HIGH GOOD TOO LOW
RF AFC2 ON
FINE
SELECT BY
OPERATE BY
14
VCO (CW) MODE
999
EXIT BY
[DO NOT USE]
HIGH LEVEL
REFERENCE LEVEL
LOW LEVEL
SYNC : YES
15
I2C BUS CTRL MODE
[FIXED ON]
I2C BUS ON
SELECT BY
OPERATE BY
EXIT BY
EX
IT
9
THEA TER MODE (1/2) THEA TER MODE (2/2)
TINT 999 B CUT. 999
COLOR 999 R DRIVE 999
PICTURE 999 B DRIVE 999
BRIGHT 999 DC REST. 999
DETAIL 999 BLK ST. 999
R CUT. 999 GMM PNT 999
G CUT. 999
SELECT BY
OPERATE BY
10
LOW LIGHT MODE
EX
IT
BRIGHT
999 999
999
EXIT BY
PAGE 1/2
999
EX
IT
CD MAT. 99 CMP CD M 99
RY GAIN 99 CMP RY G 99
GY PHASE 99 CMP GY P 99
CORING 99 CMP COR 99
SELECT BY
OPERATE BY
PAGE 2/2
EXIT BY
EX
IT
14 No. 51785
Page 15
(4) Setting method
1. BRIGHT
STATUS
999
99999999
SETTING ITEM
INITIAL
SETTING VALUE
(Adjust)
SETTING VALUE
PICTURE MODE
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.
AV-27F802
¤ The settings for LOW LIGHT and HIGH LIGHT are described in the WHITE BAL-
ANCE page of ADJUSTMENT.
No. 51785 15
Page 16
AV-27F802
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.6 EXT BRI., No.7 EXT PIC., No.8 EXT COL. and No.9 EXT TINT are linked to the items in the TV
MODE No.1 BRIGHT, No.2 PICTURE, No.3 COLOR and No.4 TINT, 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.6, 7, 8 and 9) are adjusted in the video mode, the setting values in each item are revised independently.
No. Setting (Adjustment) item Variable range Initial setting value
1 BRIGHT 000 — 127 063
2 PICTURE 000 — 127 070
3 COLOR 000 — 127 072
4 TINT 000 — 127 056
5 TV DETAIL 000 — 063 045
6 EXT BRIGHT ±025 ±000
7 EXT PICT. ±025 ±002
8 EXT COLOR ±025 ±004
9 EXT TINT ±025 ±000
10 EXT DETAIL 000 — 063 045
11 CMP BRIGHT ±025 +001
12 CMP PICT. ±025 +014
13 CMP COLOR 000 — 127 082
14 CMP TINT 000 — 127 078
15 CMP DETAIL 000 — 063 050
16 CMP R CUT ±025 –011
17 CMP G CUT ±025 ±000
18 CMP B CUT ±025 –001
19 CMP R DRV ±025 ±000
20 CMP B DRV ±025 ±000
21 WPL 000 / 001 001
22 B. B. SW 000 / 001 000
23 C TRAP 000 / 001 000
24 CORING 000 / 001 001
25 CMP CORING 000 / 001 001
26 TV SHARPF 000 / 001 001
27 EXT SHARPF 000 / 001 001
28 CMP SHARPF 000 / 001 001
29 RGB CONT 000 — 063 031
30 TV ID SEN S 000 / 001 000
31 EXT ID SEN 000 / 001 000
32 F ID 000 / 001 000
33 Y MUTE 000 / 001 000
34 AUDIO A TT 000 — 127 127
35 SUB CONT 000 — 015 008
16 No. 51785
Page 17
AV-27F802
No. Setting (Adjustment) item Variable range Initial setting value
36 R Y GAIN 000 / 001 001
37 CMP R Y GA 000 / 001 001
38 G Y PHASE 000 / 001 001
39 CMP G Y PH 000 / 001 000
40 CD MATRIX 000 — 003 003
41 CMP CD MAT 000 — 003 002
42 BLACK ST 000 — 003 001
43 DC REST 000 — 003 001
44 COLOR GMM 000 / 001 000
45 UV/CBCR 000 / 001 000
46 AT FLESH 000 / 001 000
47 ABL GAIN 000 — 003 000
48 ABL ST PNT 000 — 003 003
49 RGB ABCL 000 / 001 001
50 TV BPF TOF 000 / 001 000
51 EXT BPF TOF 000 / 001 000
52 GMM PNT 000 — 003 003
53 SVM GAIN 000 — 003 002
54 CMP SVM GA 000 — 003 002
55 SVM PHASE 000 / 001 000
56 AUDIO SW 000 / 001 000
57 BUZZ 000 / 001 000
58 IF FREQ 000 / 001 000
59 RF AGC 000 — 063 045
60 AFT MUTE 000 / 001 000
61 AFT SENS 000 / 001 001
62 R/G DRV SW 000 / 001 001
63 BLK SW 000 / 001 000
64 V S COR 000 — 015 012
65 V LIN 000 — 015 008
66 V SIZE 000 — 127 065
67 V AGC 000 / 001 000
68 V CENTER 000 — 063 043
69 TV AFC 000 — 003 002
70 EXT AFC 000 — 003 002
71 V POSI 000 — 007 000
72 H POSI 000 — 031 011
73 H SIZE 000 — 063 023
74 TV V FREQ 000 — 003 000
75 EXT V FREQ 000 — 003 000
76 SIDE PIN 000 — 063 027
77 STAND BY 000 / 001 000
78 TRAPEZ 000 — 063 035
79 V RAMP REF 000 / 001 001
80 V 48HZ 000 / 001 000
81 V EHT 000 — 007 000
82 TOP PIN 000 — 031 010
No. 51785 17
Page 18
AV-27F802
No. Setting (Adjustment) item Variable range Initial setting value
83 H EHT 000 — 007 000
84 BTM PIN 000 — 031 012
85 V BLK LOW 000 — 003 000
86 V BLK UP 000 — 003 000
87 CAPTION IN 000 / 001 000
88 H BLK 000 / 001 000
89 SCREEN 000 / 001 000
90 ACB SW 000 / 001 000
91 ACB PULSE 000 — 015 007
92 OVER MODU 000 / 001 001
93 CB/CR FIL 000 / 001 001
94 TEST 000 — 255 128
95 RF S/N TY 000 — 002 001
96 EXT S/N TY 000 — 002 001
97 RF SN YC E 000 — 255 005
98 RF SN YC F 000 — 255 016
99 RF SN YC G 000 — 063 032
100 RF SN YC H 000 — 255 025
101 EX SN YC E 000 — 255 005
102 EX SN YC F 000 — 255 016
103 EX SN YC G 000 — 063 032
104 EX SN YC H 000 — 255 025
105 RF SN VC 1 000 — 063 000
106 RF SN VC 2 000 — 063 007
107 RF SN VC 3 000 — 063 014
108 RF SN VC 4 000 — 063 021
109 EX SN VC 1 000 — 063 000
110 EX SN VC 2 000 — 063 007
111 EX SN VC 3 000 — 063 014
112 EX SN VC 4 000 — 063 021
113 COR LEVEL 000 — 003 003
114 VNR CHK 000 — 255 003
115 YC SN TIME 000 — 255 005
116 VC SN TIME 000 — 255 005
117 VM DATA A ±127 +008
118 VM DATA B ±127 –004
119 VM DATA C ±127 –016
120 VM DATA D 000 / 001 001
121 VC SN STOP 000 — 255 010
18 No. 51785
Page 19
SOUND MODE
•
No. Setting (Adjustment) item Variable range Initial setting value
1 NOISE DET. 000 / 001 001
2 IN LEVEL 000 — 063 025
3 FH MONITOR 000 / 001 000
4 STEREO VCO 000 — 063 030
5 PILOT CAN. 000 / 001 000
6 FILTER 000 — 063 030
7 LOW SEP. 000 — 063 028
8 HI SEP . 000 — 063 025
9 5FH MON. 000 / 001 000
10 SAP VCO 000 — 063 003
11 IN GAIN 000 / 001 000
12 FIL. OFFSET ±010 ±000
13 BBE BASS ±010 +001
14 BBE TRE ±010 –001
THEA TER MODE
•
Setting (Adjustment) item Variable range Initial setting value
AV-27F802
TINT ±20 –06
COLOR ±20 –03
PICTURE ±50 –15
BRIGHT ±20 ±00
DETAIL ±20 +03
R CUT. ±20 ±00
G CUT. ±20 ±00
B CUT. ±20 ±00
R DRIVE ±99 +07
B DRIVE ±99 –25
DC REST. 00 — 03 01
BLK ST. 00 — 03 00
GMM PNT 00 — 03 01
CD MATRIX 00 — 03 01
RY GAIN 00 / 01 01
GY PHASE 00 / 01 00
CORING 00 / 01 01
CMP CD M 00 — 03 01
CMP RY G 00 / 01 01
CMP GY P 00 / 01 00
CMP COR 00 / 01 01
No. 51785 19
Page 20
AV-27F802
OTHERS MODE
•
No. Setting (Adjustment) item Variable range Initial setting value
1 OSD POS. 000 — 007 002
2 CCD POS. 000 — 015 003
3 EOSEL 000 / 001 000
4 MENU COLOR 000 — –030 –010
5 MENU PICT. 000 — –030 –010
6 MENU BRI. 000 — –030 –010
PIP MODE
•
No. Setting (Adjustment) item Variable range Initial setting value
1 PIP BR 000 — 015 005
2 PIP PICT 000 — 075 045
3 PIP TINT 000 — 063 036
4 PIP COL 000 — 015 006
5 P R CUT 000 — 015 003
6 P G CUT 000 — 015 000
7 P B CUT 000 — 015 002
8 P R DR 000 — 255 052
9 P G DR 000 — 255 055
10 P B DR 000 — 255 060
11 LEFT POS. 000 — 255 012
12 RIGHT POS. 000 — 255 026
13 UPPER POS. 000 — 127 012
14 LOWER POS. 000 — 127 011
15 PICT LOCK 000 / 001 001
16 SELDEL 000 — 015 000
17 AGCFIX 000 / 001 001
18 AGCADST 000 / 001 000
19 AGC 000 — 015 007
20 VSPDEL 000 — 031 000
21 VSPISQ 000 / 001 001
22 YCOR 000 / 001 001
23 XFREQF 000 / 001 001
24 WTCHDG 000 / 001 001
25 COLON 000 / 001 000
26 ACQNEW 000 / 001 000
27 DSTDET 000 / 001 001
28 CRIBEOK 000 / 001 000
29 FCBEOK 000 / 001 000
30 NOCRID 000 / 001 000
31 NONSED 000 / 001 000
20 No. 51785
Page 21
3-D Y/C MODE
•
No. Setting (Adjustment) item Variable range Initial setting value
1 YC 001 000 — 003 001
2 YC 002 000 — 003 001
3 YC 003 000 — 003 001
4 YC 004 000 — 003 000
5 YC 005 000 — 003 000
6 YC 006 000 — 003 000
7 YC 007 000 — 003 003
8 YC 008 000 — 003 000
9 YC 009 000 — 003 001
10 YC 010 000 — 003 000
11 YC 011 000 — 007 004
12 YC 012 000 — 007 002
13 YC 013 000 — 015 002
14 YC 014 000 — 015 010
15 YC 015 000 — 015 002
16 YC 016 000 — 015 004
17 YC 017 000 / 001 000
18 YC 018 000 / 001 000
19 YC 019 000 — 003 002
20 YC 020 000 / 001 000
21 YC 021 000 / 001 000
22 YC 022 000 — 003 002
23 YC 023 000 / 001 000
24 YC 024 000 / 001 000
25 YC 025 000 / 001 000
26 YC 026 000 — 003 000
27 YC 027 000 — 003 001
28 YC 028 N/A 000 — 003 001
29 YC 029 000 — 003 001
30 YC 030 000 — 003 001
31 YC 031 000 — 003 002
32 YC 032 000 / 001 000
33 YC 033 000 — 007 000
34 YC 034 000 — 015 000
35 YC 035 000 — 007 002
36 YC 036 000 — 031 015
37 YC 037 000 — 003 000
38 YC 038 000 — 015 009
39 YC 039 000 — 003 001
40 YC 040 000 — 003 001
41 YC 041 000 / 001 000
42 YC 042 000 / 001 000
43 YC 043 000 / 001 000
44 YC 044 000 / 001 001
45 YC 045 000 — 015 003
46 YC 046 000 — 015 012
47 YC 047 000 — 015 008
AV-27F802
No. 51785 21
Page 22
AV-27F802
No. Setting (Adjustment) item Variable range Initial setting value
48 YC 048 000 — 015 004
49 YC 049 000 — 015 010
50 YC 050 000 / 001 001
51 YC 051 000 / 001 001
52 YC 052 000 — 003 000
53 YC 053 000 / 001 000
54 YC 054 000 / 001 001
55 YC 055 000 / 001 001
56 YC 056 000 / 001 001
57 YC 057 000 — 015 000
58 YC 058 000 / 001 000
59 YC 059 000 / 001 001
60 YC 060 000 — 003 000
61 YC 061 000 — 015 000
62 YC 062 DBL 000 — 007 002
63 YC 063 N/A 000 — 015 002
64 YC 064 N/A 000 — 015 004
65 YC 065 N/A 000 — 015 002
66 YC 066 N/A 000 — 015 004
67 YC 067 000 / 001 000
68 YC 068 000 / 001 000
69 YC 069 000 / 001 000
70 YC 070 FIX 000 — 003 000
71 YC 071 000 / 001 000
72 YC 072 000 / 001 000
73 YC 073 000 / 001 001
74 YC 074 FIX 000 / 001 000
75 YC 075 FIX 000 / 001 000
76 YC 076 000 / 001 001
77 YC 077 FIX 000 / 001 000
78 YC 078 FIX 000 / 001 000
79 YC 079 FIX 000 — 007 005
80 YC 080 FIX 000 — 015 000
81 YC 081 FIX 000 — 015 008
82 YC 082 FIX 000 — 015 004
83 YC 083 FIX 000 — 015 004
84 YC 084 DBL 000 — 255 112
85 YC 085 DBL 000 — 255 008
86 YC 086 000 / 001 001
87 YC 087 000 — 003 003
88 YC 088 000 / 001 001
89 YC 089 000 / 001 000
90 YC 090 000 / 001 000
91 YC 091 000 / 001 000
92 YC 092 N/A 000 / 001 000
93 YC 093 N/A 000 / 001 000
94 YC 094 DBL 000 — 003 001
22 No. 51785
Page 23
No. Setting (Adjustment) item Variable range Initial setting value
95 YC 095 DBL 000 / 001 001
96 YC 096 DBL 000 / 001 001
97 YC 097 DBL 000 / 001 000
98 YC 098 DBL 000 / 001 000
99 YC 099 DBL 000 — 003 000
100 YC 100 DBL 000 — 003 000
101 YC 101 DBL 000 / 001 000
102 YC 102 DBL 000 / 001 000
103 YC 103 DBL 000 / 001 001
104 YC 104 DBL 000 / 001 000
105 YC 105 DBL 000 / 001 000
106 YC 106 DBL 000 / 001 000
107 YC 107 DBL 000 — 007 002
108 3-D Y/C 000 / 001 001
LOW LIGHT MODE
•
Setting (Adjustment) item Variable range Initial setting value
AV-27F802
R CUTOFF 0 — 255 85
G CUTOFF 0 — 255 85
B CUTOFF 0 — 255 85
HIGH LIGHT MODE
•
Setting (Adjustment) item Variable range Initial setting value
R DRIVE 0 — 127 60
B DRIVE 0 — 127 60
RF AFC1 MODE
•
Setting (Adjustment) item Variable range Initial setting value
RF AFC1 ON / OFF ON
FINE -77 — +77 ± × ×
RF AFC2 MODE
•
Setting (Adjustment) item Variable range Initial setting value
RF AFC2 ON / OFF ON
FINE -77 — +77 ± × ×
DO NOT
ADJUST
DO NOT
ADJUST
I2C BUS CTRL MODE
•
Setting (Adjustment) item Variable range Initial setting value
I2C BUS ON/OFF [FIXED ON]
No. 51785 23
DO NOT
ADJUST
Page 24
AV-27F802
ADJUSTMENTS
B1 POWER SUPPL Y
Item
Measuring
instrument
Test point Adjustment part Description
Check of
B1 POWER
SUPPLY
DC Voltmeter R507 C504
ADJUSTMENT OF RF AGC
Item
RF AGC
adjustment
Measuring
instrument
1. Receive a black-and-white signal.
side (B1)
Q511
heatsink (
Test point Adjustment part Description
)
No.59 RF AGC
2. Connect the DC V oltmeter to R507 C504 side (B1) and Q511 heatsink
).
(
3. Confirm that the voltage is DC134V .
1. Receive a broadcast.
2. Select the No.59 RF AGC of the PICTURE MODE.
3. Press the MUTE key of the remote control unit and turn off color.
4. With the LEFT key of the remote control unit, get noise in the screen
picture. (0 side of setting value)
5. Press the RIGHT key of the remote control unit and stop when noise
disappears from the screen.
6. Change to other channels and make sure that there Is no irregular-
ity.
7. Press the MUTE key and get color out.
+2V
-2V
ADJUSTMENT OF FOCUS
Item
FOCUS
adjustment
Measuring
instrument
Signal
generator
24 No. 51785
Test point Adjustment part Description
FOCUS VR
[In HVT]
H VR
[In HVT]
Notes:
•Proceed to the following this adjustment after having completed the
•Set VIDEO STATUS to “STANDARD”.
1. Receive a crosshatch signal.
2. While looking at the screen center, adjust the FOCUS VR so that
3. Adjust the H VR so that the vertical lines will be clear and in fine
4. Make sure that the picture is in focus even when the screen gets
Note:
The final adjustment of convergence must be done after the FOCUS
adjustment. (Convergence is changed by FOCUS adjustment.)
adjustments of B1 POWER SUPPLY, SUB BRIGHT and PICTURE.
the horizontal lines will be clear and in fine detail.
detail.
darkened.
Page 25
ADJUSTMENT OF WHITE BALANCE
Item
Measuring
instrument
Test point Adjustment part
AV-27F802
Description
WHITE
BALANCE
(Low Light)
Adjustment
Signal
generator
[LOW LIGHT] MODE
BRIGHT
999
R CUTOFF
REMOTE CONTROL UNIT
H.LINE ON
999
999 999
G CUTOFF
H.LINE OFF EXIT
123
R CUTOFF G CUTOFF B CUTOFF
456
R CUTOFF G CUTOFF B CUTOFF
789
No.1 BRIGHT
R CUTOFF
G CUTOFF
B CUTOFF
SCREEN VR
[In HVT]
BRIGHT
B CUTOFF
Note :
Set VIDEO STATUS to “STANDARD”.
1. Receive a black-and-white signal.(Color off)
2. Select the [LOW LIGHT] MODE from the SERVICE MENU.
3. Set the initial setting value of BRIGHT is 063 with the LEFT / RIGHT
key of the remote control unit.
4. Set the initial setting value of R CUTOFF, G CUTOFF and B CUTOFF is 085 with the 4 to 9 key of the remote control unit.
5. Display a single horizontal line by pressing the 1 key of the remote
control unit.
6. Turn the screen VR all the way to the left.
7. Turn the screen VR gradually to the right from the left until either
one of the red, blue or green colors appears faintly.
8. Adjust the two colors which did not appear until the single horizontal
line that is displayed becomes white using the 4 to 9 keys of the
remote control unit.
9. Turn the screen VR to where the single horizontal line glows faintly.
10.Press the 2 key to return to the regular screen.
9 The 3 EXIT key is the cancel key for the WHITE BALANCE.
WHITE
BALANCE
(High Light)
Adjustment
Signal
generator
[HIGH LIGHT] MODE
999
R DRIVE
H.LINE ON
HIGHT LIGHT
REMOTE CONTROL UNIT
H.LINE OFF EXIT
999
123
R DRIVE B DRIVE
456
R DRIVE B DRIVE
789
R DRIVE
B DRIVE
B DRIVE
Notes:
•Proceed to the following this adjustment after having completed the
adjustment of LOW LIGHT WHITE BALANCE.
•Set VIDEO STATUS to “STANDARD”.
1. Receive a black-and-white signal. (Color off)
2. Select the [HIGH LIGHT] MODE from the SERVICE MENU.
3. Set the initial setting value of R DRIVE and B DRIVE is 060 with the
4 , 6 , 7 and 9 keys of the remote control unit.
4. Adjust the screen until it becomes white using the 4 , 6 , 7 and 9
keys of the remote control unit.
9 The 3 (EXIT) key is the cancel key for the WHITE BALANCE.
No. 51785 25
Page 26
AV-27F802
Item
PIP
HIGH LIGHT
WHITE
BALANCE
Measuring
instrument
Signal
generator
ADJUSTMENT OF BRIGHT
Item
SUB BRIGHT
Adjustment
Measuring
instrument
Test point Adjustment part Description
No.8 P R DR
No.10 P B DR
PIP screen
Main screen
Test point Adjustment part Description
No.1 BRIGHT Notes:
Notes:
•Proceed to the following this adjustment after having completed the
adjustments of LOW LIGHT WHITE BALANCE and HIGH LIGHT
WHITE BALANCE for the main picture.
•Set VIDEO STATUS to “STANDARD”.
1. Receive a black-and-white signal. (Color off)
2. Select the PIP MODE from the SERVICE MENU.
3. Then adjust the white color of the PIP screen using the No. 8 P R
DR and the No. 10 P B DR of the PIP MODE so that it is the same
brightness as the main screen.
•Proceed to the following this adjustment after having completed the
adjustments of LOW LIGHT WHITE BALANCE and HIGH LIGHT
WHITE BALANCE.
•Set VIDEO STATUS to “STANDARD”.
ADJUSTMENT OF CONTRAST
Item
SUB
CONTRAST
Adjustment
Measuring
instrument
Test point Adjustment part Description
No.2 PICTURE
1. Receive a broadcast.
2. Select the No.1 BRIGHT of the PICTURE MODE.
3. Set the initial setting value of the No.1 BRIGHT with the LEFT /
RIGHT key of the remote control unit.
4. If the brightness is not best with the initial setting value, make fine
adjustment of the No.1 BRIGHT until you get the optimum brightness.
Notes:
•Proceed to the following this adjustment after having completed the
adjustment of SUB BRIGHT.
•Set VIDEO STATUS to “STANDARD”.
1. Receive a broadcast.
2. Select the No.2 PICTURE of the PICTURE MODE.
3. Set the initial setting value of the No.2 PICTURE with the LEFT /
RIGHT key of the remote control unit.
4. If the contrast is not best with the initial setting value, make fine
adjustment of the No.2 PICTURE until you get the optimum contrast.
26 No. 51785
Page 27
ADJUSTMENT OF DEFLECTION
Item
Measuring
instrument
Test point Adjustment part Description
AV-27F802
V CENTER and
TRAPEZIUM
Adjustment
V-SIZE and
V-LINEARITY
Adjustment
Signal
generator
Signal
generator
Screen size
No.68 V CENTER
No.78 TRAPEZ
No.66 V SIZE
No.65 V LIN
Note:
Proceed to the following this adjustment after having completed the
adjustments of SUB BRIGHT and SUB CONTRAST.
1. Receive a crosshatch signal.
2. Adjust the No.68 V CENTER of the PICTURE MODE to be the same
between the CRT vertical center and crosshatch vertical center.
3. Adjust the No.78 TRAPEZ of the PICTUER MODE to be the vertical
lines straight.
4. Confirm the vertical lines to be straight. If it is not straight, adjust to
be straight at the No.78 TRAPEZ.
Note:
Proceed to the following this adjustment after having completed the
adjustments of SUB BRIGHT and SUB CONTRAST.
1. Receive a crosshatch signal.
2. Select the No.66 V SIZE of the PICTURE MODE to squeeze the
laster.
3. Adjust the No.65 V LIN of the PICTURE MODE to be symmetrical.
4. Adjust the No.66 V SIZE until the vertical screen size is 92%.
Screen
size 92%
H SIZE and
H POSITION
Adjustment
Screen
size
Signal
generator
Picture size 100%
Screen size 90%
Picture
size 100%
No.73 H SIZE
No.72 H POSI
Picture
size 100%
Note:
Proceed to the following this adjustment after having completed the
adjustments of FOCUS, SUB BRIGHT , SUB CONTRAST, V CENTER,
TRAPEZIUM, V-SIZE and V-LINEARITY.
1. Receive a crosshatch signal.
2. Select the No.73 H SIZE of the PICTURE MODE.
3. Set the initial setting value of the No.73 H SIZE with the LEFT /
RIGHT key of the remote control unit.
4. Adjust the No.73 H SIZE until the horizontal screen size is 90%.
5. Adjust the No.72 H POSI until the screen will be horizontally centered.
Picture size 100%
No. 51785 27
Page 28
AV-27F802
Item
SIDE PIN and
CORNER PIN
Adjsutment
PIP DISPLAY
POSITION
Adjustment
Measuring
instrument
Signal
generator
Straight Straight
Test point Adjustment part Description
No.76 SIDE PIN
No.82 TOP PIN
No.84 BTM PIN
No.11 LEFT POS.
No.12 RIGHT POS.
No.13 UPPER POS.
No.14 LOWER POS.
Note:
Proceed to the following this adjustment after having completed the
adjustments of FOCUS, SUB BRIGHT , SUB CONTRAST, V CENTER,
TRAPEZIUM, V-SIZE and V-LINEARITY.
1. Receive a crosshatch signal.
2. Adjust such that vertical 2nd lines from left and right to be straight at
the No.76 SIDE PIN of the PICTURE MODE.
3. Adjust the end of vertical 2nd lines from left and right to be straight
at the No.82 TOP PIN and the No.84 BTM PIN of the PICTURE
MODE.
Notes:
•Proceed to the following this adjustment after having completed the
adjustments of V CENTER, TRAPEZIUM, V-SIZE, V-LINEARITY, H
SIZE, H POSITION, SIDE PIN and CORNER PIN for the main picture.
•Set VIDEO STATUS to “STANDARD”.
UPPER POS.
LOWER POS.
LEFT POS. RIGHT POS.
80%
±2%
80% ±2%
Main screen size
1. Receive a broadcast.
2. Select the PIP MODE from the SERVICE MENU.
3. Then adjust the PIP screen size so that it occupies 80% ± 2% of the
main screen area.
Main
screen
size
28 No. 51785
Page 29
ADJUSTMENT OF CHROMA
Item
Measuring
instrument
AV-27F802
Test point Adjustment part Description
SUB COLOR
adjustment
Signal
generator
Oscilloscope
Remote
control unit
Y
Cy
W
TP-B
TP-E1(
[CRT SOCKET
PWB]
G
R
Mg
No.3 COLOR
)
Notes:
•Proceed to the following this adjustment after having completed the
adjustment of CONTRAST.
•Set VIDEO STATUS to “STANDARD”.
[ Method of adjustment without measuring instrument ]
1. Receive a broadcast.
2. Select the No.3 COLOR of the PICTURE MODE.
3. Set the initial setting value of the No.3 COLOR with the LEFT/RIGHT
key of the remote control unit.
4. If the color is not the best with the Initial setting value, make fine
adjustment of the No.3 COLOR until you get the optimum color.
(A)
(–)
0V
B
(+)
Notes:
•Proceed to the following this adjustment after having completed the
adjustment of CONTRAST.
•Set VIDEO STATUS to “STANDARD”.
[ Method of adjustment using measuring instrument ]
1. Input the full field color bar signal (75% white).
2. Select the No.3 COLOR of the PICTURE MODE.
3. Set the initial setting value of the No.3. COLOR with the LEFT/RIGHT
key of the remote control unit.
4. Connect the oscilloscope between TP-B and TP-E1.
5. Adjust COLOR and bring the value of (A) in the illustration to the
voltage +6V (V
W-B).
SUB TINT
adjustment
Signal
generator
Oscilloscope
Remote
control unit
Y
Cy
W
TP-B
TP-E1(
[CRT SOCKET
PWB]
G
R
Mg
No.4 TINT
)
Notes:
•Proceed to the following this adjustment after having completed the
adjustment of CONTRAST.
•Set VIDEO STATUS to “STANDARD”.
[ Method of adjustment without measuring instrument ]
1. Receive a broadcast.
2. Select the No.4 TINT of the PICTURE MODE.
3. Set the initial setting value of the No.4 TINT with the LEFT/RIGHT
key of the remote control unit.
4. If the tint is not the best with the initial setting value, make fine ad-
justment of the No.4 TINT until you get the optimum tint.
(–)
0V
(+)
B
(B)
Notes:
•Proceed to the following this adjustment after having completed the
adjustment of CONTRAST.
•Set VIDEO STATUS to “STANDARD”.
[ Method of adjustment using measuring instrument ]
1. Input the full field color bar signal (75% white).
2. Select the No.4 TINT of the PICTURE MODE.
3. Set the initial setting value of the No.4 TINT with the LEFT/RIGHT
key to the remote control unit.
4. Connect the oscilloscope between TP-B and TP-E1.
5. Adjust TINT and bring the value of (B) in the illustration to the volt-
age +2V (V
W-Mg).
No. 51785 29
Page 30
AV-27F802
ADJUSTMENT OF MTS CIRCUIT
Item
Measuring
instrument
Test point Adjustment part Description
MTS INPUT
LEVEL
check
MTS STEREO
VCO
adjustment
MTS SAP
VCO
adjustment
Signal
generator
Frequency
counter
Signal
generator
Frequency
counter
[MPX]
Connector
2
pin AUDIO R
3 pin GND
[MPX]
Connector
4 pin TP_952.5
3 pin GND
2 pin AUDIO_R
No.2 IN LEVEL
No.3 FH MONITOR
No.4 STEREO VCO
No.9 5FH MON.
No.10 SAP VCO
1. Select the No.2 IN LEVEL of the SOUND MODE.
2. Verify that the No.2 IN LEVEL is set at its initial setting value.
Note: Menu “MTS” is set to “STEREO”
1. Receive a RF signal (nonmodulated sound signal) from the antenna
terminal.
2. Select the No.3 FH MONITOR of SOUND MODE, and change the
setting value from 0 to 1.
3. Connect the Frequency Counter to pin 2 of [MPX] connector and
GND (Pin 3 of [MPX] connector).
4. Select the No.4 STEREO VCO.
5. Set the initial setting value of the No.4 STEREO VCO with the LEFT/
RIGHT key of the remote control unit.
6. Adjust the No.4 STEREO VCO so that the frequency counter will
display 15.73kHz±0.1kHz.
7. Select the No.3 FH MONITOR of the SOUND MODE, and reset the
setting value from 1 to 0.
1. Receive a RF signal (non modulated sound signal) from the antenna terminal.
2. Connect between pin 4 of [MPX] connector and GND (Pin 3 of [MPX]
connector) through 1MØ Resistor.
3. Select the No.9 5FH MON. of the SOUND MODE, and reset the
setting value from 0 to 1.
4. Connect the Frequency Counter to pin 2 of [MPX] connector and
GND (Pin 3 of [MPX] connector) .
5. Select the No.10 SAP VCO.
6. Set the initial setting value of the No.10 SAP VCO with the LEFT/
RIGHT key of the remote control unit.
7. Adjust the No.10 SAP VCO so that the frequency counter will display 78.67kHz±0.5kHz.
8. Select the No.9 5FH MON. of the SOUND MODE, and reset the
setting value from 1 to 0.
MTS FILTER
check
MTS
SEPARATION
adjustment
L-Channel
signal waveform
1 cycle
TV audio
multiplex
signal
generator
Oscilloscope
[MPX]
Connector
1 pin AUDIO_L
2 pin AUDIO_R
3 pin GND
R-Channel
crosstalk portion
Minimum
No.6 FILTER
No.7 LOW SEP.
No.8 HI SEP.
1. Select the No.6 FILTER of the SOUND MODE.
2. Verify that the No.6 FILTER is set at its initial setting value.
Note: Menu “MTS” is set to “STEREO”
1. Input a stereo L signal (300Hz) from the TV audio multiplex signal
2. Connect an oscilloscope to pin 1 of [MPX] connector, and display
3. Change the connection of the oscilloscope to pin 2 of [MPX] con-
4. Select the No.7 LOW SEP. of the SOUND MODE.
5. Set the initial setting value of the No.7 LOW SEP. with the LEFT/
6. Adjust the No.7 LOW SEP. so that the 300Hz signal level will be-
7. Change the signal to 3kHz, and connect an oscilloscope to pin 1 of
8. Adjust the No.8 HI SEP. so that the 3kHz signal level will become
30 No. 51785
generator to the antenna terminal.
one cycle portion of the 300Hz signal.
nector, and enlarge the voltage axis.
RIGHT key of the remote control unit.
come minimum.
[MPX] connector.
minimum.
Page 31
HOW TO CHECK THE HIGH VOL T AGE HOLD DOWN CIRCUIT
1. HIGH VOLT AGE HOLD DOWN CIRCUIT
After repairing the high voltage hold down circuit shown in Fig. 1.
This circuit shall be checked to operate correctly.
2. CHECKING OF THE HIGH VOLT AGE HOLD DOWN CIRCUIT
(1) Turn the POWER SW ON.
RY951
S1
connector 2 & 3 ).
RESISTOR
20.3 kΩ ± 101 Ω 1/4 W
(2) As shown in Fig. 1, set the resistor (between
(3) Make sure that the screen picture disappears.
(4) Temporarily unplug the power cord.
S1
(5) Remove the resistor (between
(6) Again plug the power cord, make sure that the normal picture is displayed on the screen.
connector 2 & 3 ).
AV-27F802
POWER
ON OFF
R952
R532
D535
R951
R533
Q531
Q951
Q532
R534
+
C533
D534
D532
BW
D531
Fig. 1
23
R537 FR525
R535R538
S1 CONNECTOR
+
HEATER
T502
4
D525
C525
No. 51785 31
Page 32
AV-27F802
SELF CHECK FUNCTIONS
1. Outline
This model has self check functions given below. When a malfunction has been detected, the POWER is turned off and the LED flashes to inform
of the failure . The malfunction is detected by the signal input state of the control line connected to the microcomputer.
2. Self check items
Check item Details of detection Method of detection State of malfunction
Over-current protector
3. Self check indicating function
The self-check function begins detection about 5 seconds after power
is supplied.
In the event a malfunction is detected, the power is cut off immediately.
At this time, the ON-TIMER LED flashes to inform of the malfunction.
[ON-TIMER LED indication]
The ON-TIMER LED flashes at 0.5 seconds intervals.
Operation of B1 protector circuit. The microcomputer detects at 1
second intervals.
If NG is detected for more than
200 ms, a malfunction is interpreted.
POWER
Supplied
After about
5 seconds
Start of
detection
When a malfunction has been
detected, the POWER is turned
off. While the POWER is being
turned off , the power key of the
remote controller is not operational until the power code is
taken out and put in again.
Malfunction
is detected
POWER OFF
Flashing
ON-TIMER LED
32 No. 51785
Page 33
VICTOR COMPANY OF JAPAN, LIMITED
HOME AV NETWORK BUSINESS UNIT 1106 Heta, Iwai-city, Ibaraki-prefecture, 306-0698, Japan
27F802S-MEM #3
Printed in Japan
VP0012
SW
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