JVC AV-2100QE, AV-21Q17, AV-21Q17/L, AV-21QMG7/G, AV-21QMG7/S Service Manual
...
SERVICE MANUAL
YA55220078SERVICE MANUAL
AV-2100QE, AV-21Q17,
COLOUR TELEVISION
AV-21Q17
/L, AV-21QMG7/G,
AV-21QMG7
COPYRIGHT © 2007 Victor Company of Japan, Limited
/S, AV-21QMG7B/G
BASIC CHASSIS
CQ
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
COPYRIGHT © 2007 Victor Company of Japan, Limited
TABLE OF CONTENTS
No.YA552
2007/8
SPECIFICATION
Contents
Items
Dimensions (W × H × D) 64.9cm × 48.7 cm × 35.1 cm
Mass 21 kg
TV RF System B/G, I, D/K, M B/G, I, D/K
Colour System TV Mode PAL, SECAM, NTSC 3.58 /
Video Mode PAL, SECAM, NTSC 3.58 / NTSC 4.43
Receiving Frequency VHF Low
VHF High
UHF
CATV
Intermediate Frequency VIF 38.0 MHz (B/G, I, D/,K,M)
SIF 32.5 MHz (5.5 MHz: B/G)
Colour Sub Carrier PAL
SECAM
NTSC
Power Input AC110 V to AC240 V, 50 Hz / 60Hz AC160 V to AC240 V, 50 Hz
Power Consumption 88 W (Max) / 99 W(Avg)
Picture Tube Visible size: 52 cm measured diagonally ( H : 41.6 cm × V : 31.5 cm)
High Voltage 24.5 kV±1.5 kV (at zero beam current)
Speaker 6.5cm × 13cm , Oval type × 2
Audio Power Output 3 W (monaural)
Aerial Input Terminal 75 Ω unbalanced, coaxial
Input Terminal
[Front / Rear]
Output Terminal
[Rear]
Headphone Jack 3.5 mm mini jack × 1
Remote Control Unit RM-C1150 (Battery size : AA / R6 / UM-3 × 2)
Video
Audio
Video
Audio
AV-21QMG7/G,
AV-21QMG7/S,
AV-21QMG7B/G
PAL, SECAM
NTSC 4.43
46.25 MHz to 140.25 MHz
147.25 MHz to 423.25 MHz
431.25 MHz to 863.25 MHz
Mid (X to Z+2, S1 to S10) / Super (S11 to S20) / Hyper (S21 to S41) bands
32MHz (6.0 MHz: I)
31.5MHz (6.5 MHz: D/K)
33.5MHz (4.5 MHz: M)
4.43 MHz
4.40625 MHz / 4.25 MHz
3.58 MHz / 4.43 MHz
1 V(p-p), 75 Ω, negative sync, RCA pin jack × 2
500 mV(rms) (-4 dBs), High impedance, RCA pin jack × 2
1 V(p-p), 75Ω, RCA pin jack × 1
500 mV(rms) (-4 dBs), Low impedance, RCA pin jack × 1
AV-21Q17
/ 60Hz
AV-2100QE,
AV-21Q17/L
Design and specifications are subject to change without notice.
1-2 (No.YA552)
SECTION 1
PRECAUTION
1.1 SAFETY PRECAUTIONS
(1) The design of this product contains special hardware,
many circuits and components specially for safety
purposes. For continued protection, no changes should be
made to the original design unless authorized in writing by
the manufacturer. Replacement parts must be identical to
those used in the original circuits. Service should be
performed by qualified personnel only.
(2) Alterations of the design or circuitry of the products should
not be made. Any design alterations or additions will void
the manufacturer's warranty and will further relieve the
manufacturer of responsibility for personal injury or
property damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These
characteristics are often not evident from visual inspection
nor can the protection afforded by them necessarily be
obtained by using replacement components rated for
higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components
having such features are identified by shading on the
schematics and by ( ) on the parts list in Service
manual. The use of a substitute replacement which does
not have the same safety characteristics as the
recommended replacement part shown in the parts list of
Service manual may cause shock, fire, or other hazards.
(4) Don't short between the LIVE side ground and
ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing.
Some model's power circuit is partly different in the GND.
The difference of the GND is shown by the LIVE : ( ) side
GND, the ISOLATED (NEUTRAL) : ( ) side GND and
EARTH : ( ) side GND.
Don't short between the LIVE side GND and ISOLATED
(NEUTRAL) side GND or EARTH side GND and never
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). If above note will
not be kept, a fuse or any parts will be broken.
(5) If any repair has been made to the chassis, it is
recommended that the B1 setting should be checked or
adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).
(6) The high voltage applied to the picture tube must conform
with that specified in Service manual. Excessive high
voltage can cause an increase in X-Ray emission, arcing
and possible component damage, therefore operation
under excessive high voltage conditions should be kept to
a minimum, or should be prevented. If severe arcing
occurs, remove the AC power immediately and determine
the cause by visual inspection (incorrect installation,
cracked or melted high voltage harness, poor soldering,
etc.). To maintain the proper minimum level of soft X-Ray
emission, components in the high voltage circuitry
including the picture tube must be the exact replacements
or alternatives approved by the manufacturer of the
complete product.
(7) Do not check high voltage by drawing an arc. Use a high
voltage meter or a high voltage probe with a VTVM.
Discharge the picture tube before attempting meter
connection, by connecting a clip lead to the ground frame
and connecting the other end of the lead through a 10kΩ
2W resistor to the anode button.
(8) When service is required, observe the original lead dress.
Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.
(9) Isolation Check (Safety for Electrical Shock Hazard)
After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/audio input and output terminals,
Control knobs, metal cabinet, screw heads, earphone jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.
a) Dielectric Strength Test
The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance rated up to 120V, and 3000V AC (r.m.s.) to an
appliance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not generally
found in the service trade.
b) 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 1000Ω per volt or more
sensitivity in the following manner. Connect a 1500Ω
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.).
AC VOLTMETER
(HAVING 1000 /V,
OR MORE SENSITIVITY)
0.15 F AC-TYPE
PLACE THIS PROBE
1500 10W
GOOD EARTH GROUND
ON EACH EXPOSED
ME TAL PAR T
(No.YA552)1-3
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
PICTURE MODE
This function can adjust the picture settings automatically.
There are USER, VIVID and SOFT in the PICTURE MODE.
RETURN +
This function can set a channel you frequently view to the
Return Channel and you can view that channel at any time with
one-touch.
2.2 MAIN DIFFERENCE LIST
Item AV-2100QE AV-21Q17 AV-21Q17/L AV-21QMG7/G AV-21QMG7/S AV-21QMG7B/G
Language Eng, Rus, Ukr
Power voltage
Cabinet colour
AC160-240V AC110-240V AC160-240V AC110-240V ←←
Silver ←←←←Black
Eng, Chi, Rus, Mal, Ind
Main PWB SCQ-1403A-H2 SCQ-1402A-H2 SCQ-1407A-H2 SCQ-1401A-H2 SCQ-1408A-H2 SCQ-1401A-H2
2.3 TECHNINAL INFORMATION
2.3.1 MAIN MI-COM (CPU) PIN FUNCTION
Pin
No.
1 NC - Not used 33 SIF-IN I SIF signal
2 NC - Not used 34 DC NF - Not used
3 KEY I Key scan for front key 35 PIF PLL - Not used
4 GND - GND for Power supply 36 IF-VCC(5V) I Vcc (5V supply) IF circuit
5 RESET I Reset 37 S-Reg - Not used
6 X-TAL O System clock oscillation 38 AUD MON 1 O Audio signal for output terminal
7 X-TAL I System clock oscillation 39 IF AGC - Not used
8 TEST - Not used 40 IF GND - GND for IF circuit
9 5V I Vdd (5V supply) 41 SAW I IF signal
10 GND - GND for Slice circuit 42 SAW I IF signal
11 GND - GND for Def block 43 RE AGC O RF AGC control level
12 FBP I FBP 44 BLACK DET - Not used
13 H-OUT O Horizontal driving pulse 45 MONITOR-OUT O Video signal for output terminal
14 H-AFC I Connected capacitor for H. AFC filter 46 APC FIL - Not used
15 V-SAM - Not used 47 5V I Vcc (5V supply) Y/C circuit
16 V-OUT O Vertical driving pulse 48 SYNC-OUT - Not used
17 A_VCC 8V I Vcc (8V supply) Def,RGB,Audio out and PIF 49 VCC 3.3V - Vcc for Digital block
18 GND - GND for TV block 50 R-OUT O Red signal
19 Cb - Not used 51 G-OUT O Green signal
20 Y-IN - Not used 52 B-OUT O Blue signal
21 Cr - Not used 53 GND - GND for digital block
22 EXT AUDIO 1 I Audio signal 1 54 GND - GND for Oscillation circuit
23 V3 I Video signal 55 5V - Vdd (5V supply) for Oscillation circuit
24 V2 I Video signal 56 POWER ON/OFF O Main power control (Hi:Power ON Low:Off)
25 ALC FILTER - Not used 57 SADA 1 I/O I
26 TV-INC(Vp-p) I Video signal (input level = 1Vp-p) 58 SCL 1 I I
27 ABCL-IN I ABL control 59 PROTECT I B1 voltage detection (Hi:OK Low:NG)
28 AUDIO-OUT1 O Audio signal 60 3.58/OTH O NTSC 3.58 detection (Hi:Detect)
29 AUDIO-OUT2 - Not used 61 A-MUTE I Audio muting (Hi:Mute)
30 TV-OUT O Video (Detected PIF signal) 62 NC - Not used
31 SIF-OUT/AUD MON OUT 2 O Audio (Detected SIF signal) 63 REMOT I Remote control
32 EXT AUDIO 2 I Audio signal 2 64 POWER LED O Lighting for power LED (Hi:Off Low:ON )
Pin name I/O Function
CHILD LOCK
VNR
←
Pin
No.
Use this function to prevent children from operating the TV
without parental consent.
This function can reduce the picture noise.
Eng, Ara, Per, Fre, Rus
Pin name I/O Function
←←
2
C bus serial data In/Out
2
C bus serial clock
1-4 (No.YA552)
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER
• Unplug the power cord.
(1) Remove the 9 screws [A] and 1 screw [B] as shown in
Fig.1.
(2) Withdraw the REAR COVER toward you.
CAUTION:
When reinstalling the rear cover, carefully push it inward after
inserting the MAIN PWB into the REAR COVER groove.
3.1.2 REMOVING THE MAIN PW BOARD
• Remove the REAR COVER.
(1) Slightly raise the both sides of the MAIN PWB by hand.
(2) Withdraw the MAIN PWB backward.
(If necessary, take off the wire clamp and connectors, etc.)
3.1.3 REMOVING THE SPEAKER
• Remove the REAR COVER.
(1) Remove the 2 screws [C].
(2) Withdraw the SPEAKER toward you.
(3) Follow the same steps when removing the other hand
SPEAKER.
3.1.4 REMOVING THE CHOKE COIL
• Remove the REAR COVER.
(1) Remove the 2 screws [D].
(2) Withdraw the CHOKE COIL.
3.1.5 CHECKING THE MAIN PW BOARD
• To check the solder side of the MAIN PWB.
(1) Pull out the MAIN PWB. (Refer to REMOVING THE MAIN
PW BOARD).
(2) The MAIN PW BOARD turns the front side down and erect
it so that you can easily check its solder side.
CAUTIONS:
• Before turning on power, make sure that the CRT earth wire
and other connectors are properly connected.
• When repairing, connect the DEG. COIL to the DEG.
connector on the MAIN PWB.
3.1.6 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.
(No.YA552)1-5
SPEAKER
FRONT CABINET
SPEAKER
C
CRT SOCKET PWB
(Within MAIN PWB)
CHOKE COIL
FRONT COTROL PWB
(Within MAIN PWB)
C
D
POWER CORD
REAR COVER
MAIN PWB
A
B
1-6 (No.YA552)
Fig.1
3.2 MEMORY IC REPLACEMENT
• This model uses the memory IC.
• This memory IC stores data for proper operation of the video and drive circuits.
• When replacing, be sure to use an IC containing this (initial value) data.
3.2.1 MEMORY IC REPLACEMENT PROCEDURE
1. Power off
Switch off the power and disconnect the power plug from the
KEY ASSIGNMENT OF REMOTE CONTROL UNIT
AC outlet.
2. Replace the memory IC
Be sure to use the memory IC written with the initial setting
values.
PICTURE
MODE key
3. Power on
Connect the power plug to the AC outlet and switch on the
power.
OK key
4. System constant check and setting
• It must not adjust without adjustment signals.
(1) Press the [DISPLAY] key and the [PICTURE MODE]
MENU
/ key
key of the REMOTE CONTROL UNIT simultaneously.
(2) The SERVICE MENU screen of Fig. 1 will be displayed.
(3) While the SERVICE MENU is displayed, again press the
DISPLAY key
[DISPLAY] key and the [PICTURE MODE] key
simultaneously, and the SYSTEM CONSTANT SET
screen of Fig. 2 will be displayed.
(4) Check the setting values of the SYSTEM CONSTANT
SETTING. If the value is different, select the setting item
with the [MENU /] key, and set the correct value with
the [MENU - / +] key.
(5) Press the [DISPLAY] key twice, and return to the normal
screen.
5. Receiving channel setting
Refer to the OPERATING INSTRUCTIONS and set the
receive channels (Channels Preset) as described.
6. User settings
Check the user setting items according to the given in page
later.
Where these do not agree, refer to the OPERATING
INSTRUCTIONS 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.
OFF
TIMER ECO
MENU
OK
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM W/B
5.PRESET
6.PLUG & PLAY (OFF)
7.HOTEL MODE (OFF)
1-7 : SELECT DISP : EXIT
Fig.1
SYSTEM CONSTANT
SYSTEM CONSTANT
SYSTEM
LANGUAGE
BLUE BACK MUTE
COLOR AUTO
BILINGUAL
EXT BPF
PICTURE BOOSTER : NO
: SELECT
/
/ : OPERATE DISP : EXIT
: TRIPLE
: E/R/U
: NO
: NO
: NO
: OFF
NUMBERS
key
MENU
/ key
Fig.2
(No.YA552)1-7
3.2.2 SETTINGS OF FACTORY SHIPMENT
3.2.2.1 BUTTON OPERATION
Setting item Setting position
POWER Off
CHANNEL PR1
VOLUME 15
3.2.2.2 REMOTE CONTROL DIRECT OPERATION
Setting item Setting position
CHANNEL PR1
VOLUME 15
TV/VIDEO TV
PICTURE MODE VIVID
3.2.3 SYSTEM CONSTANT SETTING
Setting item
SYSTEM TRIPLE
LANGUAGE Eng,Rus,Ukr Eng,Chi,Rus,Mal,Ind
BLUE BACK MUTE NO
COLOUR AUTO NO
BILINGUAL NO
EXT BPF OFF B/G
PICTURE BOOSTER
AV-2100QE AV-21Q17/L AV-21Q17 AV-21QMG7/G AV-21QMG7B/G AV-21QMG7/S
←←
←←←←
←←
←←←←←
NO
←←←←←
3.2.2.3 REMOTE CONTROL MENU OPERATION
(1) MENU-1
Setting item Setting position
PICTURE SETTING CENTRE
WHITE BALANCE COOL
ECO MODE OFF
ON TIMER PR1 0:00
OFF TIMER OFF
(2) MENU-2
Setting item Setting position
AI VOLUME OFF
CHILD LOCK OFF
BLUE BACK ON
VNR AUTO
(3) MENU-3
Setting item Setting position
LANGUAGE ENGLISH
COLOUR SYSTEM PAL
SOUND SYSTEM B/G
Setting value
MULTI
←
←←←←
Eng,Ara,Per,Fre,Rus
YES
←←
←←
YES
←←
1-8 (No.YA552)
3.2.4 SERVICE MENU SETTING ITEMS
Setting item Setting value Setting item Setting value
1. IF 1.VCO
2.DELAY POINT
2. V/C 1.CUTOFF (R/B/G)
2.WRD (G/B)
3.BRIGHT (TV/VDO 1,2)
4.CONT. (TV/VDO 1,2)
5.COLOUR (TV/VDO 1,2)
6.TINT (TV/VDO 1,2)
7.SHARP (TV/VDO 1,2)
8.Y DELAY (TV/VDO 1,2)
9.VNR STATUS(AUTO)
3. DEFLECTION 1.VER POS
2.VER SIZE
3.VER LIN
4.HOR POS
5.HOR BOW
6.HOR PARA
7.VER BLK
8.VER CENT
9.V.S-CR
10.HOR SIZE
11.EW PIN
12.TRAPEZ
13.COR-UP
14.COR-LO
15.HOR EHT
16.VER EHT
4. VSM/WB CONT.
BRIGHT
SHARP
COLOUR
TINT
WDR G
WDR B
5. PRESET
[Do not adjust]
1.OVER MOD
2. N BUZZ
3.S TARP A
4. S TRAP F0
5.STRAP Q
6.SHARP GD
7.S. TRAP HP/LP
8.AF AMP SPEED
9.PIF FREQ
10.AU MON
11.ALC
(No.YA552)1-9
3.3 REPLACEMENT OF CHIP COMPONENT
3.3.1 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.
3.3.2 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.
3.3.3 REPLACEMENT STEPS
1. How to remove Chip parts
2. How to install 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 the tweezers and remove the chip part.
[Transistors, diodes, variable resistors, etc.]
(1) Apply extra solder to each lead.
SOLDER
SOLDER
[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 A as indicated in the figure.
(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.
1-10 (No.YA552)
A
B
C
(4) Then solder leads B and C.
A
B
C
SECTION 4
ADJUSTMENT
4.1 ADJUSTMENT PREPARATION
(1) There are 2 ways of adjusting this TV : One is with the
REMOTE CONTROL UNIT and the other is the
conventional method using adjustment parts and
components.
(2) The adjustment using the REMOTE CONTROL UNIT is
made on the basis of the initial setting values. The
setting values which adjust the screen to the optimum
condition can be different from the initial setting
values.
(3) Make sure that connection is correctly made AC to AC
power source.
(4) Turn on the power of the TV and measuring instruments for
warming up for at least 30 minutes before starting
adjustments.
(5) If the receive or input signal is not specified, use the most
appropriate signal for adjustment.
(6) Never touch the parts (such as variable resistors,
transformers and condensers) not shown in the adjustment
items of this service adjustment.
4.2 PRESET SETTING BEFORE ADJUSTMENT
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT.
Item Preset value
PICTURE MODE VIVID
PICTURE SETTING FOR USER MODE Centre
VNR OFF
BLUE BACK OFF
OFF TIMER OFF
4.3 MEASURING INSTRUMENT AND FIXTURES
(1) DC voltmeter (or digital voltmeter)
(2) Oscilloscope
(3) Signal generator
(Pattern generator : PAL / SECAM / NTSC)
(4) Remote control unit
(5) High voltmeter (with 1000MΩ input impedance)
4.4 ADJUSTMENT ITEMS
CHECK ITEM
• B1 VOLTAGE check
• HIGH VOLTAGE check
TUNER / IF CIRCUIT
• IF VCO adjustment
• DELAY POINT adjustment
FOCUS
• FOCUS adjustment
DEFLECTION CIRCUIT
• V.POSITION adjustment
• V.SIZE adjustment
• V.LINEARITY adjustment
• V.S-CURVE adjustment
• H.POSITION adjustment
• H.BOW adjustment
• H.PARALLEL adjustment
• H. SIZE adjustment
• SIDE PIN adjustment
• TRAPEZIUM adjustment
• CORNER PIN adjustment
VIDEO CIRCUIT
• WHITE BALANCE adjustment
• SUB BRIGHT adjustment
• SUB CONTRAST adjustment
• SUB COLOUR adjustment
• SUB TINT adjustment
VSM/WB SETTING
• VSM adjustment
(No.YA552)1-11
4.5 ADJUSTMENT LOCATIONS
MAIN PWB ASS'Y
(CRT SOCKET)
POWER
CORD
DEG COIL
FRONT
MAIN PWB ASS'Y
(FRONT LED)
CN10A
POWER SW
S901
PW
DEG
CN00A
S804 S802
S805
1
6
TOP
S803 S801
T
1
6
TP-47/R
TP-47/G
(BRAIDED ASS'Y)
J808
J807
IC702
T
E2
CRT EARTH
J806
41
CN00S
J809
(SOLDER SIDE)
TP-47B
E1
41
CRT EARTH
(BRAIDED ASS'Y)
U
FRONT
MAIN PWB ASS'Y
IC701
J804J801 J802 J803
CN00C
61
TU001
CN00C
1. 5V
I2C
2. SCL0
3. SDA0
4. SCL1
5. SDA1
6. GND
U
41
GND
B1
3
1
CN00B
CN00B
1. B1
2. NC
3. GND
HV
14
HVT
UPPER : FOCUS
LOWER : SCREEN
DEF
YOKE
1-12 (No.YA552)
4.6 BASIC OPERATION OF SERVICE MENU
4.6.1 TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
4.6.2 SERVICE MENU ITEMS
With the SERVICE MENU, various adjustments can be made, and they are broadly classified in the following items of settings.
1.IF Adjustment of the IF circuits.
2.V/C Adjustment of the VIDEO circuit.
3.DEF Adjustment of the DEFLECTION circuit.
4.VSM/WB Adjustment of the initial setting values of VSM condition as SOFT and USER.
5.PRESET Adjustment of the RF circuit [Do not adjust].
4.6.3 HOW TO ENTER THE SERVICE MENU
Press the [DISPLAY] key and the [PICTURE MODE] key of
the REMOTE CONTROL UNIT simultaneously. Then enter the
SERVICE MENU SELECT KEY
SERVICE MENU mode as shown in Fig.1.
OFF
MENU
TIMER ECO
OK
NUMBERS
key
MENU
/ key
SERVICE MENU
1.IF 2.V/C
3.DEF 4.VSM W/B
5.PRESET
6.PLUG & PLAY (OFF)
7.HOTEL MODE (OFF)
1-7 : SELECT DISP : EXIT
Fig.1
PICTURE
MODE key
OK key
MENU
/ key
4.6.4 HOW TO STORE OF SETTING VALUE
The setting value will be stored automatically when release the
REMOTE CONTROL UNIT keys.
4.6.5 HOW TO EXIT THE SERVICE MENU
Press the [DISPLAY] key from the state of SERVICE MENU.
DISPLAY key
(No.YA552)1-13
4.6.6 METHOD OF SETTING
1. IF
[1. VCO]
(1) [1] key Select 1. IF.
(2) [1] key Select 1. VCO.
Check the arrow position between the ABOBE REF. and BELOW REF.
(4) [DISPLAY] key As you press this key twice, you will return to the SERVICE MENU.
[2. DELAY POINT]
(1) [1] key Select 1. IF.
(2) [2] key Select 2. DELAY POINT.
(3) [MENU /] keys Set (adjust) the setting values of the setting items.
(4) [DISPLAY] key When this is pressed twice, you will return to the SERVICE MENU.
2. V/C, 3. DEF and 4. VSM W/B
(1) [2] to [4] keys Select one from 2. V/C, 3. DEF and 4. VSM W/B.
(2) [MENU /] keys Select setting items.
(3) [MENU /] keys Adjust the values of the items.
(4) [DISPLAY] key When this is pressed, you will return to the SERVICE MENU.
5. PRESET (Do not adjust)
1-14 (No.YA552)
4.6.7 SERVICE MENU FLOW CHART
SERVICE MENU
SERVICE MENU
1.IF
3.DEF
5. PRESET
6.PLUG & PLAY (OFF)
7.HOTEL MODE (OFF)
2.V/C
4.VSM W/B
1. IF
IF SERVICE MENU VCO(CW) 210.25 MHz
1.VCO
2.DELAY POINT
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
1-7 SELECT
DISP: EXIT
DISP:EXIT DISP:EXIT
2. V/C
V/C PAL
1.CUT OFF
( R ) 20
BRIGHT :40 INITIAL:40
(G) 20 (B) 20
: SEL
: OPER
3. DEF
DEF 50 Hz
1. VER POS 00
: SEL
: OPER
4. VSM W/B
VSM SOFT
1. CONT + 0
: SEL
: OPER
DISP:EXIT
DISP:EXIT
DISP:EXIT
DELAY POINT VHF
4:3/16:9
WDR G
WDR B
17
DISP:EXIT
9.V-S .CR
10.HOR SIZE
11.EW PIN
12.TRAPEZ
13.COR-UP
14.COR-LO
15.HOR EHT
16.VER EHT
RF AGC
: OPER
SETTING ITEMS
1.VER POS
2.VER SIZE
3.VER LIN
4.HOR POS
5.HOR BOW
6.HOR PARA
7.VER BLK
8.VER CENT
SETTING ITEMS
1.CUTOFF (R/G/B)
2.WDR (G/B)
3.BRIGHT (TV/VDO 1,2)
4.CONT. (TV/VDO 1,2)
5.COLOUR (TV/VDO 1,2)
6.TINT (TV/VDO 1,2)
7.SHARP (TV/VDO 1,2)
8.Y DELAY (TV/VDO 1,2)
SOFT / USER
SETTING ITEMS
1.CONT. 4.COLOUR
2.BRIGHT 5.TINT
3.SHARP
WARM / NORMAL
SETTING ITEMS
6. PLUG & PLAY
SERVICE MENU
1.IF
3.DEF
5. PRESET
6.PLUG & PLAY (OFF)
7.HOTEL MODE (OFF)
1-7 SELECT
2.V/C
4.VSM W/B
DISP: EXIT
5. PRESET
PRESET AUTO
1. OVER MOD 0
50Hz D/K
: SEL
: OPER
7. HOTEL MODE
SERVICE MENU
1.IF
3.DEF
5. PRESET
6.PLUG & PLAY (OFF)
7.HOTEL MODE (OFF)
1-7 SELECT
2.V/C
4.VSM W/B
DISP:EXIT
DISP: EXIT
SETTING ITEMS
1.OVER MOD 7.S. TRAP HP/LP
2.N BUZZ 8.AF AMP SPEED
3.S TARP A 9.PIF FREQ
4.S TRAP F0 10.AU MON
5.STRAP Q 11.ALC
6.SHARP GD
(No.YA552)1-15
4.7 INITIAL SETTING VALUE OF SERVICE MENU
• 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.
• Do not change the initial Setting Values of the Setting (Adjustment) items not listed in "ADJUSTMENT PROCEDURE".
• The " --- " means adjustment is not possible.
• " * " is variable values for adjustment and other value variable when have problem only.
[2. V/C] (Values for adjustment indicate in hexadecimal number.)
[AV-2100QE, AV-21Q17, AV-21Q17/L]
Setting item Variable range
PAL SECAM NTSC 3.58 NTSC 4.43
Initial setting value
1.CUT OFF R 00 - FF 20*
G 00 - FF 20*
B 00 - FF 20*
2.WDR G 00 - FF 40*
B 00 - FF 40*
3.BRIGHT RF 00 - (+127) +65*
VIDEO-1 (-128) - (+127) -01
VIDEO-2 (-128) - (+127) 00
4.CONT. RF 00 - (+127) +107
VIDEO-1 (-128) - (+127)
VIDEO-2 (-128) - (+127)
+07
5.COLOUR RF 00 - (+127) +67 +64 --- ---
VIDEO-1 (-128) - (+127)
VIDEO-2 (-128) - (+127)
-02 -6 -01 +08
6.TINT RF 00 - (+127) +67 +65 --- ---
VIDEO 1/2 (-128) - (+127) -02 -03 +07 +6
7.SHARP RF 00 - (+63) +40 +40 +40
VIDEO 1/2 00 - (+63) +45 +40 +45
8.Y DELAY RF 00 - 07 03 01 02 00
VIDEO 1/2 00 - 07 02 00 00 05
9.VNR STATUS RF ---
VIDEO 1/2 ---
---
1-16 (No.YA552)
[AV-21QMG7/G, AV-21QMG7/S, AV-21QMG7B/G]
Setting item Variable range
PAL SECAM NTSC 3.58 NTSC 4.43
Initial setting value
1.CUT OFF R 00 - FF 20*
G 00 - FF 20*
B 00 - FF 20*
2.WDR G 00 - FF 40*
B 00 - FF 40*
3.BRIGHT RF 00 - (+127) +65*
VIDEO-1 (-128) - (+127) -01
VIDEO-2 (-128) - (+127) -00
4.CONT. RF 00 - (+127) +107
VIDEO-1 (-128) - (+127)
VIDEO-2 (-128) - (+127)
+07
5.COLOUR RF 00 - (+127) +67 +64 +69 +06
VIDEO-1 (-128) - (+127)
VIDEO-2 (-128) - (+127)
-02 -06 -01 +08
6.TINT RF 00 - (+127) +67 +65 +57 +04
VIDEO 1/2 (-128) - (+127) -02 -03 +07 +06
7.SHARP RF 00 - (+63) +40 +40 +40
VIDEO 1/2 00 - (+63) +45 +40 +45
8.Y DELAY RF 00 - 07 03 01 02 00
VIDEO 1/2 00 - 07 02 00 00 05
9.VNR STATUS RF ---
VIDEO 1/2 ---
---
[3. DEFLECTION] (Values for adjustment indicate in hexadecimal number.)
Initial setting value
Setting item
Variable range
50Hz 60Hz 50Hz 60Hz
1.VER. POS 00 - 0F 00 - 0F 00 00
2.VER. SIZE 00 - 3F C0 - 3F 2A* 00*
3. VER LIN 00 - 1F E0 - FF 0D* 00*
4. HOR POS 00 - 1F E0 - FF 0A* 03*
5. HOR BOW 00 - 07 03* 03*
6. HOR PARA 00 - 07 03* 03*
7. VER BLK 00 - 0F 04 04
8. VER CENT 00 - 3F 21* 00*
9. V.S-CR 00 - 1F E0 - 1F 19* 00*
10. HOR SIZE 30* 00*
11. EW-PIN 45* 00*
12. TRAPEZ 23* 00*
13. COR-UP 0A* 0A*
14. COR-LOW 0B* 0B*
15. H EHT 04 04
16. V EHT 04 04
(No.YA552)1-17
[4. VSM/WB] (Values for adjustment indicate in hexadecimal number.)
Setting item Variable range
Initial setting value
SOFT USER
CONT. 80 - 7F DF 00
BRIGHT 80 - 7F 00 00
SHARP 80 - 7F FA 00
COLOUR 80 - 7F 00 00
TINT 80 - 7F 00 00
Setting item
WARM NORMAL
Initial setting value
WDR G F4 07
WDR B EA F9
[5. PRESET] (Do not adjust)
The items in the following table, it is no requirement for adjustment.If values had changed by the miss operation, set the
initial setting values in the following table.
Setting item Variable range
M B/G I D/K
Initial setting value
1. OVER MOD 00 - 01 00
2. N BUZZ 00 - 01 01
3. S TRAP A 00 - 01 00 00 00 00
4. S TRAP F0 00 - 0F 08 06 08 08
5. S TRAP Q 00 - 03 02 02 02 01
6. S TRAP GD 00 - 03 01 00 00 00
7. S TRAP HP/LP 00 - 03 00 00 00 00
8. AF AMP SPEED 00 - 01 00
9. PIF FREQ 00 - 03 00
10. AU MOM 00 - 03 00
11. ALC FC - FF FF
[6.PLUG & PLAY]
Setting of the last memory for shipment to “ON”.
When this mode is ON, the TV can be turned on/off power by connecting/disconnecting the AC plug into AC outlet.
[7.HOTEL MODE]
Setting of the last memory for shipment to “OFF”.
When this mode is ON, all keys except following ones are invalid.
[POWER / CHANNEL,VOLUME +- / 10KEY / MUTING / "TV/VIDEO" / OFF TIMER / "-/--" / DISPLAY]
1-18 (No.YA552)
4.8 ADJUSTMENT PROCEDURE
4.8.1 CHECK ITEM
Item
B1 VOLTAGE Signal
HIGH VOLTAGE HV voltmeter
Measuring
instrument
generator
DC voltmeter
Signal
TP-B1 : 1-pin
TP-E : 5-pin
(S1 connector)
[MAIN PWB]
CRT anode
Chassis GND
generator
4.8.2 TUNER / IF CIRCUIT
Item
Measuring
instrument
IF VCO Remote
control unit
Test point Adjustment part Description
(1) Receive a whole black signal.
(2) Connect a DC voltmeter to 1-pin and 5-pin of S1
connector.
(3) Make sure that the voltage is DC115.2V±2.0V.
(1) Receive any broadcast.
(2) Connect the earth clip of High voltmeter to chassis
GND.
(3) Connect the probe of High voltmeter to CRT anode.
(4) Make sure that the voltage is DC24.5kV ±1.5kV.
NOTE:
• Remove the probe before removing the earth clip.
Test point Adjustment part Description
[1.IF]
1.VCO
• Under normal conditions, no adjustment is required.
• Confirmation adjustment.
(1) Select 1.IF from the SERVICE MENU.
(2) Select <1.VCO>
(3) Receive any broadcast.
(4) Check the ←(Arrow) position between the ABOVE
REF. and BELOW REF.
IF SERVICE MENU
1. VCO
2. DELAY POINT
DISPLAY : EXIT
Receiving frequency
VCO (CW)
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
. MHz
DISPLAY : EXIT
YELLOW
(No.YA552)1-19
Item
DELAY POINT
(AGC)
Measuring
instrument
Test point Adjustment part Description
Signal
generator
Remote
control unit
DELAY POINT VHF
RF AGC **
- / + : OPERATE DISP : EXIT
[1. IF]
2. DELAY POINT
(AGC TAKE-OVER)
(1) Receive a black and white signal (colour off).
(2) Select 1. IF.
(3) Select <2. DELAY POINT>.
(4) Set the setting values of the setting items as shown
bellow table.
(5) Adjust the [MENU /] keys until video noise
disappears.
(6) Turn to other channels and make sure that there are
no irregularities.
Setting Item
DELAY POINT
(AGC TAKE-OVER)
NTSC3.58
OTHER
4.8.3 FOCUS
Item
Measuring
instrument
FOCUS Signal
generator
Variable range
0 - 127
Initial setting value
17
17
Test point Adjustment part Description
FOCUS VR
[In HVT]
(1) Receive a crosshatch signal.
(2) While looking at the screen center, adjust the
FOCUS VR to make the vertical and horizontal lines
as fine and sharp as possible.
(3) Make sure that when the screen is darkened, the
lines remain in good focus.
1-20 (No.YA552)
4.8.4 DEFLECTION CIRCUIT
• There are 2 modes of adjustment (setting value) 50Hz mode and 60Hz mode, depending upon the kind of signals (vertical frequency
50Hz / 60Hz).
• When adjusted in 50Hz mode and 60Hz mode will be automatically set.
The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values.The setting
values which adjust the screen to the optimum condition can be different from the initial setting values.
• Make sure that the adjustment is properly done on the screen of 60Hz mode.
NOTE:
• Adjust to make both 50Hz & 60Hz are the same V. size and fine straight line.
• When adjust again, adjust 50Hz mode first.
• When adjust in 60Hz mode, only 60Hz mode is adjust.
Item
V. POSITION /
V. SIZE
Measuring
instrument
Signal
generator
Remote
control unit
Test point Adjustment part Description
[3. DEF]
1. VER. POS
2. VER. SIZE
(1) Receive a crosshatch signal.
(2) Select 3. DEF from the SERVICE MENU.
(3) Select <1. VER. POS>.
(4) Set the initial setting value of <1. VER. POS>.
(5) Adjust <1. VER. POS> to make the vertical centre
fall on the display centre.
(6) Select <2. VER. SIZE>.
(7) Set the initial setting value of <2. VER. SIZE>.
Screen
size
92%
Picture
size
100%
(8) Adjust <2. VER. SIZE> to make the vertical screen
size be 92% of the picture size.
V.LINEARITY /
V-S.CURVE
Signal
generator
Remote
control unit
H. POSITION Signal
generator
Remote
control unit
(A)
[3. DEF]
3. VER. LIN.
9. V.S-CR
Top
Centre
Bottom
[3. DEF]
4. HOR. POS
(B)
• If the vertical linearity is noticeably deteriorated, perform
the following steps.
(1) Receive a crosshatch signal.
(2) Select 3. DEF from the SERVICE MENU.
(3) Select <3. VER. LIN.>.
(4) Set the initial setting value of <3. VER. LIN.>.
(5) Select <9. V.S-CR>.
(6) Set the initial setting value of <9. V.S-CR>.
(7) Adjust <3. VER. LIN.> and <9. V.S-CR> so that the
space of upper and lower lines on TOP, CENTRE
and BOTTOM become uniform.
(1) Receive a circle pattern signal.
(2) Select 3. DEF from the SERVICE MENU.
(3) Select <4. HOR. POS>.
(4) Set the initial setting value of <4. HOR. POS>.
(5) Adjust <4.HOR. POS> to be equal the width of (A)
and (B).
(No.YA552)1-21
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