More then 0~1550mVrms (+6dBs)
Low Impedance (400Hz when modula ted 100%) (RCA pin jack)
3.5mm stereo
mini jack (Headphone Jack)
RM-C373 (AA/R6/UM-3 battery×2)
Design & specification are subject to change without notic e.
2
No.51866
A
SAFETY PRECAUTIONS
V-T2122
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
manuf act urer's warr an t y and wil l fur t h er reli ev e t h e manufacturer
of responsi bility f or person al injury or pr operty dam age res ulting
therefrom.
3. Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are
often not evident f rom visual i nspection nor can t he protect ion
afford ed by them n ecess arily be obt ained by using rep lacem ent
compon ents rated f or higher voltag e, watt ag e, etc. R epl acem ent
parts which have these special safety characteristics are
identified in the parts list of Service manual.
compon ents hav in g su ch feat ures are id entif ied by s hadin g
on the sche matics and by (
manual.
have the same safety characteristics as the recommended
replac ement part shown i n the p arts list of S ervic e manu al may
cause shock, fire, or other hazards.
The us e of a subst itute replacement which does n ot
) on the parts list in Service
!!!!
Electrical
4.
Don't short b etween the LIV E side groun d 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 GN D is sh ow n by the LIV E : (") 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 meas ure with a measuri ng apparatus (osc illoscope etc .)
the LIVE side GND and ISOLATED(NEUTRAL) side GND or
EARTH side GND at the same time.
If above not e wi ll n ot be kept, a fuse or any parts w ill 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 hig h voltage app lied t o the picture t ube must c onform wit h
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
voltag e conditions s hould b e kept to a mi nimum, or sh ould be
prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection
(incorrect install ation, crack ed or melted high volt age harness ,
poor solderi ng, etc.). To maintain the pr oper minimum le vel 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 l ead to th e g roun d fr am e and c on necti ng t h e oth er end of
the lead through a 10k" 2W resistor t o the an ode button .
8. W hen servic e is requir ed, obser ve the origin al lead dress . Extr a
precaut ion shou ld be gi ven to assure c orrect l ead dr ess in t he
high voltage circuit area. Where a short circuit has occurred,
those comp onents that in dicat e evidenc e of over heating should
be replaced. Always use the manufacturer's replacement
components.
9.
Isolation Check
(Saf ety for Electrical Shock Hazard)
After re-assembling the product, always perform an isolation
check on the exposed metal parts of the cabinet (antenna
termin als , vid eo/ au dio input and output term inals, Con trol knobs,
metal c abinet, s crewhead s, earph one j ack, contr ol shafts, etc.)
to be sure the product is safe to operate without danger of
electrical shock.
(1)
Dielectric Stren gt h Test
The isol ation b etween th e AC pr imar y circuit and all metal parts
expos ed t o th e user, p ar tic u larly any exp osed metal part h avi ng a
return p ath to the chassis should withst and a voltage of 3000V
AC (r.m.s .) for a period of on e s ec on d.
(. . . . W ithstand a voltag e of 1100 V AC ( r.m.s.) to an applianc e
rated up t o 120V, and 3000V AC (r. m.s.) t o an appl iance rat ed
200V or mor e, f or a peri od of on e s ec on d.)
This method of test requires a test equipment not generally found
in the service trade.
(2)
Leak age Current Check
Plug the AC lin e c or d dir ec t l y int o t he AC outlet ( d o 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. ). An y leak age c urr ent mus t 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 lin e c or d dir ec t l y int o t he AC outlet ( d o not use a line
isolati on transform er during t his check. ). Use an AC voltmet er
having 1000 ohms per volt or more sensitivity in the following
manner. Connect a 1 500" 10W resistor paralleled by a 0.15#F
AC-typ e capacitor betw een an expos ed metal part and a know n
good earth ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the resistor
connect ion t o each exp os ed met al p art, part icul arl y any exp osed
metal part h avin g a return p ath to th e chassis , and meas ure th e
AC voltag e across the res istor. N ow, re vers e 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 , i n t ropical area, this m us t not exc eed 0.3V AC (r.m.s .).
This corresponds to 0.2mA AC (r.m.s.).
0.15μF AC-TYPE
1500
GOOD EARTH GROUND
"
AC VOLTMETER
(HAVING 1000
OR MORE SENSITIVITY)
10W
"
/V,
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
No.51866
3
A
V-T2122
FEATURES
New chassis desi gn enabl es us e of a main b oard with simp lif ied
"
circuitry.
Provided with mi niatur e tun er (TV /C ATV).
"
PLL synthesizer system TV/CATV tota ling 181 channels.
"
Multifunctional remote control permits picture adjustment.
"
With AUDIO. VIDEO INPUT terminal.
"
FUNCTIONS
Front control
■■■■
Adopti on of the VIDEO STATUS func ti on.
"
Adoption of the ON/OFF TIMER function.
"
With 75ΩV/U in common (F-Type) ANT Terminal.
"
SLEEP TIMER for sett ing in real ti me.
"
Wide range voltage (90V~260V) AC power input.
"
Variable audio ou t p ut terminal.
"
1234567891011121314
HEADPHONE JACK Teminal
①
VIDEO INPUT Teminal
②
AUDIO L INPUT Tem inal
③
AUDIO R INPUT Teminal
④
MENU Button
⑤
CHANNEL ∨Button
⑥
CHANNEL ∧Button
⑦
4
No. 51866
VOLUME - Buttom
⑧
VOLUME + Buttom
⑨
ECO sensor
⑩
Remote control sensor
⑪
ON TIMER lamp
⑫
POWER lamp
⑬
MAIN POWER SW Button
⑭
A
■
■Rear terminal
■■
2
3
47
■
■Remote control unit ( RM-C373)
■■
V-T2122
ANT Terminal
①
VIDEO INPUT Terminal
5
1
6
②
AUDIO L INPUT Terminal
③
AUDIO R INPUT Terminal
④
VIDEO OUTPUT Terminal
⑤
AUDIO L OUTPUT Terminal
⑥
AUDIO R OUTPUT Terminal
⑦
11
10
1
TV / VIDEO key
①
DISPLAY key
2
3
4
5
6
7
8
9
12
13
14
15
16
17
②
PICTURE BOOSTER key
③
CLOSED CAPTION key
④
SLEEP TIMER key
⑤
VIDEO STATUS key
⑥
COLOUR SYSTEM key
⑦
EXIT key
⑧
MENU (▲/▼& +/-)key
⑨
RETURN+ key
⑩
CHANNEL key
⑪
POWER key
⑫
Number (CH.) key
⑬
- /- - key
⑭
HYPER SURROUND key
⑮
MUTING key
⑯
VOLUME key
⑰
No. 51866
5
A
V-T2122
SPECIFIC SERVICE INSTRUCTIONS
DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power supply cord.
2. Remove the 6 screws marked
3. Withdraw the rear cover toward you.
REMOVING THE MAIN PW BOARD
Afte r removing the rear cover.
"
1. Slight l y raise both sid es of the MAIN PW Board by hand and w it hdraw it b ack w ard.
(If necessary, t ak e off the wire clam p and connec tors, etc.)
REMOVING THE SPEAKER
Afte r removing the rear cover.
"
1. Remove the 2 screws marked
2. Follow the same step for removing the other hand speaker.
CHECKING THE MAIN PW BOARD
1. To check the backside of the MAIN PW Board.
1) Pull out the MAIN PW Board. (Refer to REMOVING THE MAIN PWB).
2) Erect the chassis vertically so that you can easily check the backside of the MAIN PW Board.
and 2 screws marked
!"
!"
!"!"
.
$$$$
####.""""
[CAUTION]
When erecting the MAIN PW Board, be careful so that there will be no contacting with other PW Board.
"
Bef or e turni ng on power, m ak e sure that all connector s are properl y connected.
"
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. 51866
A
FRONT CABINET
SPEAKER
C
CRT SOCKET PWB
(Wit hin MAIN PWB )
MAIN PWB
V-T2122
(×2)
SPEAKER
REAR COVER
C
(×2)
(×2)
B
(×6)
A
No. 51866
7
A
V-T2122
MEMORY I C REPLAC EMENT
1. Memory IC
This model uses a memory IC.
The memor y IC st or es dat a for proper op er at ion of video and deflecti on c irc uits.
When replacing, be sure to use an IC containing this (initial value) data.
2. Memory IC replacement pro cedu re
PROCEDURESCREEN DISPLAY
(1)
Power off
Switch off the power and dis connect th e pow er c or d from the wall
outlet.
(2)
Replace the memory IC
.
Be sure to u se memo ry ICs written with the i nitial data values.
(3)
Power on
Connect the power cord to the wall outlet and switch on the power.
(4)
System constant check and setting
) Simul taneous ly press th e DISPLA Y key and V IDEO STAT US key
1
of the remote control unit.
) The SERVICE MENU screen of Fig.1 is displayed.
2
) While the SERVICE MENU is displayed, again simultaneously
3
press t h e D IS PLAY an d VIDEO S T ATUS k eys to dis play t h e Fig.2
SYSTEM CONSTANT screen.
) Refer to the SYSTEM CONSTANT table and check the setting
4
items. W here these diff er, select th e setting it em with the MENU
UP / DO WN key and adjust t he setting with the MENU LEFT /
RIGHT keys. (The letters of the selected item are displayed in
yellow.)
) A fter adj ustin g, r el ease t h e MENU LE FT / R IG HT key to st or e t he
5
setting value.
) Press the EXIT key twice to return the normal screen.
6
SERVICE MENU
PICTURESOUND
VIDEO STATUSOTHERS
LOW LIGHTHI GH LIGHT
RF AFC CHK
VCO (CW)I2C BUS CTRL
SELECT BY
OPERATE BY
EXIT BY
EXIT
IT
Fig.1
SYSTEM CONSTANT
VIDEO: 2
AUDIO: MTS
VARI. OUT: NO
GAME: YES
CINEMA: YES
(5)
Receive chann el s et ting
SELECT BY
OPERATE BY
EXIT BY
EXIT
Refer to the OPERATING INSTRUCTIONS (USER’S GUID E) and
set the receive channels (Channels Preset) as de scribed.
SYSTEM CONSTANT
(6)
User setti n gs
Check th e us er s ett in g i t ems according t o Table 2-1 and 2- 2.
CCD: YES
RETURN+: YES
SURROUND: YES
Where these do not agree, refer to the OPERATING
INSTRUCTIONS (USER’S GUIDE) and set the items as described.
(7)
SERVICE MENU setting
M37272MA-
SELECT BY
OPERATE BY
×××
×××
××××××
SP
EXIT BY
EXIT
Verify what to set in the SERVICE MENU, and set whatever is
necessary. (Fig.1) Refer to the SERVICE ADJUSTMENT for setting.
1.Settin g of FUN CTION
Setting itemSetting valueSetting itemSetting value
MAIN POWEROFFDISPLAYOFF
SUB POWERONSLEEP TIMER0 MIN
CHANNELCH 02VIDEO STATUSESTANDAR
CAPTIONOFF(CC1/T1)PICTURE BOOSTEROFF
VOLUME10COLOR SYSTEMAUTO
TV/VIDEOTVHYPER SURROUNDOFF
Table 2-1
2.Setting of MENU
Setting itemSetting value
TINTEESTANDARALTAVOCESSI
COLORESTANDARCHILD LOCKNO
CONTRASTEESTANDARTEMPORIZADORNO
BRILLOESTANDARLISTA DE CANAISSET OPTIONALLY
DETALLEESTANDARAJUSTE CODIGO DE ACCESOUnnecessary to Set
GRAVESCENTERPANTALLA AZULNO
AGUDOSCENTERFONDO NEGROSI (SIM)
BALANCECENTERIDIOMAESP.
MTSESTÉREOSUBTITULOS OCULTOSNO(CC1/T1)
Table 2-2
Setting itemSetting value
No.51866
9
A
V-T2122
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION
1. You can make t he n ec essary adju st ments for this un it wit h eit her the r em ote contro l u nit or with th e adj ust ment equ ip ment and
part s as given below.
2. Adjustment with the remot e contro l un it i s m ade on t he b a si s of the initial set t i ng values, h owever, th e new sett i n g values which
set the screen to its optimum condition may differ from the initial settings.
3. Make sure that AC power is turned on correctly..
4. Turn on the power for the set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes
5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
6. Never touch any adjustment parts, which are not specified in the list for this adjustment-variable resistors, transformers, condensers, etc .
7. Presetti ng b ef or e ad jus t m ent .
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
VIDEO STATUSESTANDAR
GRAVES, AGUDOS, BALANCECENTER
$$$$
ADJUSTMENT EQUIPMENT
1. DC voltmet er ( or di gi tal voltmeter)
2. Oscilloscope
3. Signal generator ( Pattern generator ) [NTSC%M]![PAL-M] [PAL-N ]
4. Remote control unit
5. TV audio multiplex signal generator
6. Frequency counter
ADJUSTMENT ITEMS
B1 POWER SUPPLY
●
IF VCO adjustment
●
RF AGC adjustment
●
FOCUS ad jus tment
●
DEFLECT IO N ad jus t m ent
●
V. HEIGHT, V. POSITION, V. LIN., V S CR adjustment
H. POSITION adjustment
VIDEO / CHROMA adjustment
●
WHITE BALANCE (Low light) adjustment
WHIT E BALAN C E (H i gh li ght) adjus t m ent
SUB BRIGHT adjustment
SUB CONTRAST adjustment
SUB COLOR adjustment
SUB TINT adjustment
●MTS adjus t m en t
INPUT LEVEL adjustment
STEREO VCO adjustment
SAP VCO adjustment
FILTER check
SEPARATION adjust ment
10
No.51866
A
ADJUSTMENT LOCATIONS
(
)
FRONT
VOL+
V-T2122
CH-CH+VOL-
MENU
SW
DEG.
F901
PW
MPX
T
5 1
AV IN OUT
IC701
TUNER
IC704
T111
CW
IC101
B1(TP-91)
GND(TP-E)
B1
S
MAIN P WB
HV
3
1
X
U
T522
3
1
UPPER : FOCUS
LOWER : SCREEN
CRT SOCKET PWB
TOP
(Within MAIN PWB ASS'Y)
TP-47B
E1
TP-E
SOLDER SIDE
No.51866
CRT EARTH
(BRAIDED ASS'Y)
11
A
V-T2122
BASIC OPERATION OF SERVICE MENU
1. Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
2. In general
(1) PICTURE
(2) SOUND
(3) VIDEO STATUS
(4) OTHERS
(5) LOW LIGHT
(6) HIGH LIGHT
(7) RF AFC CHK
(8) VCO (CW)
(9) I
3. Basic Opera ti o ns of th e SER VI C E M EN U
(1) How to enter the SERVICE MENU.
(2) SERVICE MENU screen selection
basic sett ing
!!!!
・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・
2
C BUS CTRL
・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・
(adjustments) items or verifications are performed in the SERVICE MENU.
!!!!
This set the setting values (adjustment values) of the VIDEO/CHROMA and DEFLECTION circuits.
This set the setting values (adjustment values) of the AUDIO circuit.
・・・・・・・・・・・・・
This is used when the THEATER and GAME MODE is adjusted.
This is used when the OTHERS MODE is adjusted.
This sets the setting values (adjustment values) of the WHITE BALANCE circuit.
This sets the setting values (adjustment values) of the WHITE BALANCE circuit.
This is used when the RF AFC CHK MODE is verified.
This is used when the IF VCO is adjusted.
・・・・・・・・・・・・・・・
This is used when ON/OFF of the I2C BUS CTRL is set.
[Do not adjust]
[Fixed ON]
Press the DISPL A Y k ey and V IDEO ST AT US k e y!of the remote control unit at the same time to enter the SERVICE MENU screen
shown in figure page la ter.
Press the UP / DOWN key of the MENU to select any of the following items.
(The lett ers of t h e sel ec t ed it ems are disp l ayed in y ell ow .)
PICTURE
●
VIDEO STATUS
●
LOW LIGHT
●
RF AFC CHK
●
VCO (CW)
●
SOUND
●
OTHERS
●
HIGH LIGHT
●
I2C BUS CTRL
●
①
(3) Enter the any setting ( adjustment ) mode
PICTURE, SOUND and OTHERS mode
"
1) If select any of PICTURE, SOUND or OTHERS items, and the LEFT / RIGHT key is pressed from SERVICE MENU ( MAIN
MENU ), the screen ② will be dis p layed as sh ow n in fi gure page later.
2) T hen the U P / DOWN k ey is pr ess ed, th e PICT UR E m ode sc r een ③ or th e SOUND m ode s cr een ④ or the OTHERS mode
screen ⑤ is displayed, and the PICTURE, SOUND or OTHERS setting can be performed.
VIDEO STATUS, LOW LIGHT, HIGH LIGHT, RF AF C
"
CHK,
VCO (CW) and I
!!!!
!!!!
2
C BUS CTRL mode
1) If select any of VIDEO STATUS / LOW LIGHT / HIGH LIGHT / RF AFC CHK / VCO (CW) / I2C BUS CTRL items, and the LEFT
/ RIGHT k ey is pr essed fr om SER V I CE ME NU ( MAIN MENU ), t h e sc reens ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ w ill b e displ ayed as sh own in
figure page later.
2) Then the s ett in gs or verificat i ons c an b e performed.
12
No.51866
A
V-T2122
)
)
y
①①①①
SERVICE MENU (MAIN MENU
SERVICE MENU
PICTURESOUND
VIDEO STATUSOTHERS
LOW LIGHTHIGH LIGHT
RF AFC CHK
VCO (CW
SELECT BY
OPERATE BY
⑧⑧⑧⑧
HIGH LIGHT MODE
HIGH LIGHT
***
******
******
⑨⑨⑨⑨
RF AFC CHK MODE
I2C BUS CTRL
EXIT BY
EXIT
***
******
EXIT BY
EXIT
[DO NOT ADJUST]
②②②②
SCREEN
SELECT BYEXIT BY
④④④④
SOUND MODE
1. NOISE
STATUS
SELECT BY
OPERATE BY
EXIT
***
***
******
****
****
********
EXIT BY
EXIT
③③③③
PICTURE MODE
1. PICTURE
*****
*********
**********
SELECT BY
OPERATE BY
⑤⑤⑤⑤
OTHERS MODE
1. OSD HP
SELECT BY
OPERATE BY
***
***
******
****
********
EXIT BY
EXIT
***
***
******
EXIT BY
EXIT
RF AFCON
FINE
SELECT BY
OPERATE BY
⑩⑩⑩⑩
VOC (CW) MODE
TOO HIGH
ABOVE REFERENCE
BELOW REFERE NCE
TOO LOW
SYNC : YES
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.
(PICTURE MODE ONLY)
[NOTE]
When the IN ITIAL SET TING VALUE is t urned to yell ow, you can adj ust the
values but you cannot adjust the values when it is turned to red.
(Because the signal conditions, etc. are not met.)
(5) Releasing SERVICE MENU
1) After returni ng to the SERVICE MENU upon c ompletion of t he setting
(adjust m ent ) w or k, pr ess the EXIT key ag ain.
1. PICTURE
*****
*********
**********
SELECT BY
OPERATE BY
PICTURE MODE
SETTING
ITEM
1. NOISE
STATUS
SELECT BY
OPERATE BY
***
***
******
****
********
EXIT BY
EXIT
***
***
******
****
****
********
EXIT BY
EXIT
IT
IT
INITIAL
SETTING VALUE
↓ (Adjus t)
SETTING VALUE
The s ettings f or LOW LIGHT and H IGH LIGHT are descr ibed in t he W HITE
★
BALANCE page of ADJUSTMENT.
The setting for VCO (CW) are described in the IF VCO page of ADJUSTMENT.
★
The letter of the
Items are dis played in y ell ow .