JVC AV28L2EUBL, AV28L2EUGR, AV28L2EUGY Service Manual

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SER VICE MANUAL
COLOUR TELEVISION
V28L2EUG
V28L2EUBL
V28L2EUG
BASIC CHASSIS
AV28L2EUGR AV28L2EUBL AV28L2EUGY
MF
CONTENTS
SPECIFICATIONS
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SAFETY PRECAUTIONS
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FEATURES
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MAIN DIFFERENCE LIST
!
SPECIFIC SERVICE INSTRUCTIONS
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SERVICE ADJUSTMENTS
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PARTS LIST
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OPERATING INSTRUCTIONS
STANDARD CIRCUIT DIAGRAM
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COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
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No.51778 May. 2001
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V28L2EUBL V28L2EUG

SPECIFICATIONS

Item Content
Dimensions ( W Mass TV RF System Colour System
Stereo System Teletext System
Receiving Frequency
Intermediate Frequency
Colour Sub Carrier Freq.
Power Input Power Consumption
Aerial Input Term Picture Tube High Voltage
Speaker Audio Output
EXT-1/EXT-2/EXT-3 (IN/OUT) EXT-4 (Input) Video
D )
××××H××××
VIF Carrier SIF Carrier
SECAM
Audio(L/R)
S / Video
VHF UHF
PAL
NTSC
800mm×500mm×498mm
41.0kg CCIR ( B/G, D/K, L, L’, I ) PAL / SECAM / NTSC (Only in EXT mode)
A2 (B/G, D/K) / NICAM (B/G, I, D/K, L) Fastext (UK system) / TOP (German system)
WST(Standard system)
47MHz ~ 470MHz 470MHz ~ 862MHz
French cable TV channel of broadcast frequencies 116~172MHz & 220~469MHz
!
38.9MHz (B/G, D/K, I, L) / 33.95MHz (L’)
33.4MHz (5.5MHz : B/G)
32.9MHz (6.0MHz : I ) / 32.4MHz (6.5MHz : L, D/K) / 40.45MHz (6.5MHz : L’)
4.43MHz
4.40 625MHz / 4.25MHz
3.58MHz / 4.43MHz AC 220V~240V , 50Hz 183W(Max) / 127W(Avg), 75Ωunbalanced, Coaxial
Visible size : 66cm, Measured diagonally
+
31.0kV (at zero beam current) 20cm×4cm, Oval type×2 with BOX
7.5W + 7.5W 21-pin Euro connector (SCART socket)×3
1Vp-p 75Ω(RCA pin j ac k) 500mVrms(-4dBs), High Impedance (RCA pin jack)
Y : 1Vp-p POSITIVE (Negative sync Provided, when terminated with 75Ω) C : 0.3Vp-p (Burst signal, when terminated with 75Ω)
1.0kV
-1.5kV
AUDIO OUT (Variable)
Headphone jack Remote Control Unit
0~1Vrms, Low Impedance (RCA pin jack×2)
Stereo mini jack (φ3.5mm ) RM-C54 (AAA/R03 dry cell battery×2)
Design & specifications are subject to change without notice
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■■■■
21-pin Euro connector (SCART socket) : EXT-1 / EXT-2 / EXT-3
(P-P= Peak to Peak, B -W= Bl ank ing to white peak)
Pin
Signal Designation Matching Value EXT-1 EXT-2 EXT-3
No.
1 AUDIO R output 500mVrms(Nominal),
Low impedance
2 AUDIO R input 500mVrms(Nominal),
High impedance
3 AUDIO L output 500mVrms(Nominal),
Low impedance
4 AUDIO GND 5 GND (B) 6 AUDIO L input 500mVrms(Nominal),
High impedance
7B input 8 FUNCTON SW
(SLOW SW)
9 GND (G) 10 SCL3 NC 11 G input 12 SDA3 NC 13 GND (R) 14 GND (YS) 15 R / C input
16 Ys input 17 GND(VIDEO output) 18 GND(VIDEO input) 19 VIDEO out pu t
20 VIDEO / Y input 21 COMMON GND
700mV Low : 0-3V, High : 8-12V, High
impedance
700mV
R : 700mV C : 300mV Low : 0 - 0.4, High : 1 - 3V, 75
1V
1V
, 75
Ω○
B-W
, 75
Ω○
B-W
, 75
Ω
B-W
, 75
Ω
P-P
(Neg ati ve g oin g s ync ) , 75
P-P
(Neg ati ve g oin g s ync ) , 75
P-P
Ω○
Ω○
Ω○
(TV OUT)
○○○
(TV OUT)
○○○
○○○
○○○
○○○
○○○
○○○
○○
(only R)
○○○
○○○
(TV)
○○○
(LINE OUT)
(LINE OUT)
○○
(LINE OUT)
V28L2EUG
V28L2EUBL
V28L2EUG
NC
NC
NC
NC NC NC
NC
(only C)
NC
NC
Pin assignment
[
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V28L2EUBL V28L2EUG

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 manuf act urer's warr anty and will fur t her reliev e the manuf actur er 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 char acteristics 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 not
) 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 th e GND is sh own by the LI VE : (") 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 inst allation, cracked or m elted high voltage harness, poor solderi ng, etc.). To maintain the pr oper minimum le vel of soft X-Ray emission, components in the high voltage circuitr y 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 pictur e tube bef ore attempting met er connect ion, 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. W here 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 inpu t an d output term inals, Con t r ol kn obs, 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 g th 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 met al part h avi ng a return p ath to the chassis should withst and a voltage of 3000V AC (r.m.s .) for a peri od of on e s ec ond.
(. . . . W ithstand a voltag e of 1100 V AC ( r.m.s.) to an applianc e
rated up t o 120V, and 3000 V AC (r. m.s.) t o an appl iance r ated 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 outl et (do not us e a lin e 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 outl et (do not us e a lin e 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 ropic al area, this m us t n ot exceed 0. 3 V A C (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
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FEATURES

V28L2EUG
V28L2EUBL
V28L2EUG
New chassis design enable use of an interactive on screen
"
control.
The TELETEXT SYSTE M has a built-i n FAST EXT ( UK s ystem),
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TOP (German system) and WST (world standard system) system.
Pure FLAT CRT reproduce fine textured.
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Digi Pure pro : Auto digi pure with motion picture compensation.
"
B ecause this TV uni t corresp onds t o multipl ex broadc ast, us ers
"
can enjo y music pr ograms an d spor ting ev ents wit h live real ism. In additi on, BILINGUAL programs c an be heard in their original language.
Built-in ECO (ECONOMY, ECOLOGY) MODE.
"
In accordance with the brightness in a room, the brightness and/or contrast of the picture can be adjusted automatically to make th e opti mu m pictur e wh ic h is eas y on th e ey e.
TV EXT-1 EXT-3
Users can make VCR dubbing of picture and sound by controlling
"
the AV select or to sel ect an opti onal sour ce at the E XT-2 output shown in figure.
EXT-4
EXT-2

MAIN DIFFERENCE LIST

Model name
!!!!
Part name
FRONT FRAME LC11007-001B-U LC11007-002B-U LC11007-003A-U
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RATING LABEL
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EURO LABEL AEM1052-017-E AEM1052-014-E AEM1052-071-E
AV28L2EUGR AV28L2EUBL AV28L2EUGY
LC20380-008A-U LC20379-008A-U
LC20380-012A-U LC20379-012A-U
LC20380-023A-U LC20379-019A-U
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SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Unplug the power cord.
2. Remove the 11 screws marked ”A” as shown in the Fig. 1.
3. Withdraw the rear cover toward you.
REMOVING THE SIDE C ON TRO L JACK ASSEMBLY
After removing the rear cover.
"
1. Remove the sc r ew m ark ed B as shown in the Fig.1.
2. While slight l y r aise the side control jack assembl y, remo ve th e 2 claws under the side control jack assembly.
3. Disconnect t he c onn ector “SR”, “SL”, “S”, “F” and “K” as shown in Fig 2.
REMOVING THE SIDE CONTROL PWB
After removing the rear cover and side control jack assembly.
"
1. R emove the 3 c laws “C” f rom b ack s i d e of t h e s i d e co n tro l j ac k assembly as shown in Fig.2.
2. Pull out the SIDE CONTROL PWB.
REMOVING THE CHASSIS
After removing the rear cover.
"
1. Slightly rais e the b ot h sid es of the c hass is b y h and and r em ove the two c laws und er th e both s id es of the c has sis from the f r ont cabinet.
2. Withdraw the chassis backward. (If necessary, take off the wire clamp, connectors etc.)
REMOVING THE SPEAKER BOX
After removing the rear cover.
"
1. Remove the 2 screws marked ”D” as shown in Fig. 1.
: W hen removing t he screws marked D of th e speaker b ox
NOTE
assembly, remove the lower side screw first, and then remove the upper one.
2. Remove the 2 screws “E” attaching the speaker box.
3. Remove the 2 screws “F” attaching the speaker.
4. Follow the same steps when removing the other hand speaker.
CHECKING THE PW BOARD
To check the back side of the PW Board.
1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).
2) Erect t he ch assis vertic ally s o that you c an easi ly ch eck th e back side of the PW Board.
[CAUTION]
When erecting the chassis, be careful so that there will be no
"
co n tac ti ng wit h oth e r PW B o ard .
Before turning on power, make sure that the wire connector is
"
properly connected.
When conducting a check with power supplied, be sure to confirm
"
that the CRT EARTH WIRE (BRAID ED ASS’Y) is conn ected to the CRT SOCKET PW board.
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 inad ver tent l y remov ed, b e sur e to ti e th e wir es with a new cable tie.
Connector
SR SL S
F
K
(Back view)
Fig. 2
C
SIDE CONTROL PWB
C
REMOVING THE AV TERMINAL BOARD
After removing the rear cover.
"
1. Remove the 3 screws marked ”G” as shown in the Fig. 1.
2. Remove the 2 cl aws mark ed “H” under the CH ASSIS as sh own in Fig. 3.
3. Remove th e AV TERMIN AL BOARD slig htly in the direc tion of arrow ”I” as shown in Fi g. 3.
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No.51778
V TERMINAL
BOARD
I
H
H
AV SW PWB
Fig. 3
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SPEAKER
FRONT CABINET
Fig. 2
F
SPEAKER
CRT SOCKET PWB
FRONT CONTROL PWB
CONTROL
B
BASE
CLAW
MICON PWB
CLAW
100Hz
PWB
D
F
V SW
PWB
MAIN PWB
BOX
E
POWER & DEF. P WB
CHASSIS
V TERMINAL
BOARD
G
(×3)
E
SIDE CONTROL JACK ASSEMBLY
SPEAKER
SPEAKER BOX
REAR COVER
Fig. 1
A
POWER CORD
(×11)
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REMOVING THE CRT
Replacement of the CRT should be performed by 2 or more
$
persons.
After removing the cover, chassis etc.,
!
1. Putting the CRT change table on soft cloth, the CRT change table
should also be covered with such soft cloth (shown in Fig.4).
2. While keeping the surface of CRT down, mount the TV set on the
CRT change table balanced will as shown in Fig.5.
3. Remove 4 scr ews m ar k ed b y arrows with a box typ e sc r ew driver
as shown in Fig.5.
Since the cabi n et wi ll drop wh en s c rews have been rem o ved , be
!
sure to support the cabinet with hands.
4. After 4 sc rews have been removed, put th e cabinet sl owly on
cloth (At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig.6.
The CRT should be assembled according to the opposite
!
sequence of its dis m oun ti ng steps.
T he CRT ch ang e t ab l e shoul d preferab ly be smaller th at th e CRT
$
surfac e, and its heig ht b e ab out 35cm.
About CRT Spacer
$
An appropriat e C R T s p ac er s h ou ld be used in the corres p on di ng CRT in accordance with th e type of the CRT. When a CRT is repl ac ed, s peci al att enti on s houl d be p aid to t his matter.
CRT CHANGE TABLE
PPROX.
35cm
CLOTH
Fig. 4
COAT ING OF SILICON GREASE FO R ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION.
Subsequ ent to rep lacemen t of t he CRT and HV transf ormer or
!
repair of the anode c ap, etc. by dismou nting them, be sure to coat silicon greas e f or el ec trical insulati on as sh own in F i g. 7. Wipe around the anode button with clean and dry cloth. (Fig.7) Coat sil icon gr eas e on t he s ection arou nd the anod e but ton. A t this ti me, t ak e c are s o th at an y si lic on gr eas es d os e not s tic k to the anode button. (Fig.8)
Silicon grease product No. KS - 650N
★★★★
CRT
node button
Silicon gr ease
coating
CABINET
pprox. 20mm (Do not coat grease on this section
node button (No sticking of silicon grease)
Fig. 5
CRT
CRT CHANGE TABLE
Fig. 6
Silicon gr ease should b e c oat ed by 5mm or mor e from the outside diamet er of anode cap.
Coating positi on of silicon grease
node cap
Fig. 7 Fig. 8
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REPLACEMENT OF MEMORY ICs
1. Memory ICs
This TV use mem ory ICs . In the mem or y ICs, there ar e memor iz ed dat a for cor rectl y op er ating th e vi deo an d def l ection cir cu its. W h en r epl acing memory ICs, be sure to use ICs written with the initial values of data.
2. Procedure for replacing memory ICs
PROCEDURE
(1)
Power off
Switch th e p ow er off and unpl ug the p ow er c ord from the w all ou tl et.
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. PIP 8.
9. SHIPPING (OFF) 0. BUS FREE 1-9 : SELECT : EXITi
Fig.1
V28L2EUG
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(2)
Replace ICs
.
Be sure to use memory ICs written with the initial data values.
(3)
Power on
Plug the power cord into the wall outlet and switch the power on.
(4)
Check and set SYSTEM CONSTANT SET:
It must not adjust with ou t sign al.
****
1) Press the INFORMATION key and the MUTING key of the REMOTE CONTROL UNIT simultaneously.
2) T he SERVICE MEN U scr een of F ig . 1 wil l b e dis pl ayed.
3) While the SERVICE MENU is displayed, press the INFORM ATION key and MUT ING key s imultan eousl y, and th e SYSTEM CONSTANT SET screen of Fig. 2 wi ll b e dis pl ay ed.
4) Ch eck t he s etti ng valu es of th e SY STE M CON STA NT S ET of Table 1. If the valu e is dif f erent , s elect the s et ting item wi th th e FUNCTION UP/DOWN key, and set th e correct value with the FUNCTION -/+ key.
5) Press the MENU(OK) key to memorize the setting value.
6) Press the INFORMATION key, and return to the normal screen.
(5)
Setting o f re ce iv e channel s
Set the receive channel. For setting, refer to the OPERATING INSTRUCTIONS.
(6)
Setting of SERVICE MENU
Verif y the s etting items of th e
SERVICE MENU
wh ere neces sary . For setting, refer to the SERVICE ADJUSTMENTS.
of Table 2, and reset
SYSTEM CONSTANT SET
1. DESTINATION EU
OK
+ : STORE : EXIT
i
Fig.2
2. CRT TYPE 16 : 9
3. PURITY NO
4. PICTURE TILT YES
5. DIGIPURE PRO YES
6. PIP NO
7. PIC & TEXT YES
8. DOLBY NO
9. BBE YES
10. PROGRESSIVE YES
11. TDA9178 YES
12. TONE IC NO
13. FLAT YES
NAME OF REMOTE CONTROL KEY
Names of key
INFORMATION
key
iiii
MUTING
MENU
OK
(7)
User setti n gs
Check th e us er s ett in g values of T abl e 3, and if setti ng v al ue is different, set the correct value.
FUNCTION UP/DOWN
For setting, refer to the OPERATING INSTRUCTIONS.
TV
+
FUNCTION -/+
TV
No. 51778
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SETTIN G VALUES OF SYSTEM CONSTANT SET (TABLE 1)
Setting item Setting content Setting value
1. DESTINATION EU
2. CRT TY P E 16 : 9
3. PURITY NO
4. PICTURE TILT YES
5. DIGIPURE PRO YES
6. PIP NO
7. PIC & TEXT YES
8. DOLBY NO
9. BBE YES
10. PROGRESSIVE YES
11. TDA9178 YES
12. TONE IC NO
13. FLAT YES
EK EU EI
16 : 9 4 : 3
YES NO
YES NO
YES NO
1 TUNER
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
2 TUNER
NO
SERVICE MENU SETTING ITEMS (TABLE 2)
Setting item Setting value Setting item Setting value
1. IF 1. VCO 4. DEF. 1. V-SHIFT
2. V-SIZE
3. H-CENT
4. H-SIZE
5. TRAPEZ
2. V / C 1. RGB BLK
2. WDR R
3. WDR G
4. WDR B
5. BRIGHT
6. CONTRAST
7. COLOUR
8. HUE
9. SHARP
10. VCO ADJUSTMENT
11. VIDEO AGC
12. SYNC SLICE
5. VSM PRESET COOL NORMAL WARM
6. EW-PIN
7. COR-PIN
8. COR-UP
9. COR-LO
10. ANGLE
11. BOW
12. V-S.CR
13. V.LIN
1. CONT.
2. BRIGHT
3. SHARP
4. COLOUR
5. HUE
6. WDR R
7. WDR G
8. WDR B
3. AUDIO
(Do not adjust)
10
1. ERR LIMIT
2. A2 ID THR
6. STATUS
No. 51778
(Do not adjust)
VPS PDC
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USER SETTING VALUES (TABLE 3)
Setting item Setting value Setting item Setting value
SUB POWER ON VOLUME Appropriate sound volume
SHIPPING CHANNEL PR1 DISPLAY INDICATED
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PRESET CHANNEL
PICTURE SETTING EXT SETTING
TINT CONTRAST BRIGHT SHARP COLOUR ECO MODE
PICTURE FEATURES FEATURES
DIGITAL VNR DIGIPURE PRO COLOUR SYSTEM
AUTO ASPECT
SOUND SETTING INSTALL
BASS TREBLE BALANCE TV SPEAKER HYPER SOUND BBE
See ; OPERATING INSTRUCTIONS.
COOL REFER to VSM SETTING REFER to VSM SETTING REFER to VSM SETTING REFER to VSM SETTING OFF
AUTO AUTO TV : According to preset CH EXT : AUTO PANORAMIC
CENTER CENTER CENTER L / R
OFF ON
ZOOM MODE PANORAMIC
ID DUBBING
SLEEP TIMER BLUE BLACK CHILD LOCK DECODER (EXT-2)
LANGUAGE EDIT
BLANK EXT-1→EXT-2
OFF ON ID : No.0000, ALL CH : OFF ALL CH : OFF
ENGLISH PR CHANNEL ONLY OTHERS : BLANK
No. 51778
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SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT
1.
There are 2 ways of adjusting this TV: One is with the REMOTE CONTRO L UNIT and t he oth er is t he conv ention al method using adjustment parts a nd components.
2.
The setting (adjustment) using the REMOTE CONTROL UNIT is ma de on t he b asis of th e initi al se tting v alue s. 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 to AC power source.
4. Turn on the power of the TV and measuring instrument for warming up for at least 30 minutes before starting adjustment.
5. If the receive or input signal is not specified, use the most appropriate signal for adjustment.
6. N ever touc h parts ( suc h as vari able r esist ors, tr ansf ormers and condens ers) not show n in the adj ustment i tems of this s ervice adjustment.
7. Preparation for adjustment (presetting): Unless oth erwise sp ecified in t he adjust ment items , preset t he following functions with the REMOTE CONTROL UNIT:
Setting position
"
PICTURE MODE (VSM) NORMAL SLEEP TIMER OFF BALANCE CENTER ECO OFF ZOOM PANORAMIC
MEASURING INSTRUMENT AND FIXTURES
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generato r) [PAL / SECAM / NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
Checking items.
Adjustment of FOCUS.
VSM preset s etti ng.
VIDEO / CHROMA circuit adjustment.
DEFLECTION circuit adjustment.
AUDIO circuit adjustment.
(Do not adjust)
12
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ADJUSTMENT LOCATIONS
)
SIDE CONTROL PWB
TOP
V28L2EUG
V28L2EUBL
V28L2EUG
SR
FRONT
FRONT
FRONT CONTROL PWB
F901
PW
POWER SW
MAIN PWB POWER&DEF PWB
CN002
S
L
MICON PWB
AV SW PWB
CN006
TUNER
CN007
HEAD PHONE
S-IN
E X T
CN102
W
4
SL
S
F
K
FRONT
W DEG
CN004
CN005
TOP
OUT
EXT 1 2 3
AUDIO
IN-OUT IN
CRT SOCKET PWB
TP-47G
TP-E
CN013
100Hz PWB
ANT IN
TP-47R
CN003
CN013
(SOLDER SIDE)
TP-47B
CN014
CN014
HV
HVT
FOCUS 1 VR FOCUS 2 VR
SCREEN VR
X
1 5
1pin:B1(TP-91
2pin:NC 3pin:X-RAY 4pin:X-RAY 5pin:GND
CN006
C2
E1
No. 51778
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BASIC OPERATION SERVICE MENU
1. TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the REMOTE CONTROL UNIT.
2. SERVICE MENU ITEMS
With the S ERVIC E MENU, vari ous s ettings (adjust ments ) can be made, and the y are br oadly c lassif ied in th e f ollowing items of settings (adjustments): (1) (2) (3) (4)
1. IF
・・・・・・・・・・・・・・・・・・・・・・・
2.V/C
・・・・・・・・・・・・・・・・・・・・・・
3.AUDIO
4.DEF
・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・
This mode adjusts the setting values of the IF circuit. This mode adjusts the setting values of the VIDEO / CHROMA circuit. This mode adjusts the s etting val u es of the multi pl ic it y SOUND circui t. This mode adjusts the setting values of the DEFLECTION circuit for each aspect mode given below.
ASPECT V. FREQ. FULL 100Hzi / 60HzP / 120Hzi PANORAMIC SUBTITLE
(5)
5.VSM PRESET
・・・・・・・・・・・・・
This mod e adj us ts the initial s ett in g values of COO L,N OMAL an d W A RM. (VSM : Video Status Memory)
3. BASIC OPERATION OF SERVICE MENU
(1)
How to enter SERVICE MENU
Press the INFORMATION key and the MUTING key of the REMOTE CONTROL UNIT simultaneously, and the SERVICE ME NU sc r een of Fi g. 1 wi ll b e dis pl ay ed.
(2)
Selection of SUB MENU SCREEN
Press one of keys 1~5 of the REMOTE CONTROL UNIT and select the SUB MENU SCR EEN (See Fi g. 3), f orm the SERVICE MENU. SERVICE MENU → SUB MENU
1. IF
2. V / C
3. AUDIO
4. DEF.
5. VSM PRESET
6. STATUS
7. PIP
8. - - -
9. SHIPPING (OFF)
0. BUSS FRE E
DO NOT WORK
SERVICE MENU
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. PIP 8.
9. SHIPPING (OFF) 0. BUS FREE
1-9 : SELECT : EXI Ti
Fig.1
NAME OF REMOTE CONTROL KEY
Names of key
INFORMATION
MUTING
MENU
FUNCTION UP/DOWN
FUNCTION -/+
TV
key
iiii
OK
TV
+
Fig.2
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(
)
(**)
1. V-SHIFT
)
2. V-SIZE
3. H-CENT
4. H-SIZE
5. H-TRAPEZ
6. EW-PIN
7. COR-PIN
8. COR-UP
9. COR-LO
10. ANGLE
11. BOW
12. V-S.CR
13. V.LIN
SUB MENU 4. DE F
DEF FULL
1. V-SHIFT
: STORE i : EXIT
OK
- / +
SERVICE MENU
SERVICE MENU
1. IF 2. V/C
3. AUDIO 4. DEF
5. VSM PRESET 6. STATUS
7. PIP 8. - - -
9. SHIPPING 1-9 : SELECT i : EXIT
**
**
Hz
****
***
OFF)0. BUS FREE
IF SERVICE MENU
1. VCO
2. ATT ON/OFF
1-2 : SELECT i : EXIT
SUB MENU 1.IF (CW)
**
**....**
VCO (CW
MAIN TOO HIGH ABOVE REF JUST REF BELOW REF TOO LOW
**
MHz
****
****
i : EXIT
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Do Not move.
COOL NORMAL WARM
1. CONT.
2. BRIGHT
3. SHARP
4. COLOUR
5. HUE
6. WDR R
7. WDR G
8. WDR B
SUB MENU 5. VSM PRESET
VSM PRESET NORMAL
1.CONT
- / +
: STORE i : EXIT
OK
***
Fig. 3 SUB MENU SCREEN
SUB MENU 2. V/C
PAL
V/C
1. RGB. BLK
- / +
SUB MENU 3. AUDIO (Do not adjust
- / +
: STORE i : EXIT
OK
AUDIO
1. ERR LIMIT 10H C AD BITS =
: STORE i : EXIT
OK
****
********
1. RGB BLK
2. WDR R
3. WDR G
4. WDR B
5. BRIGHT
6. CONTRAST
7. COLOUR
8. HUE
9. SHARP
10.VCO ADJUSTMENT
11. VIDEO AGC
12. SYNC SLICE
1.ERR LIM IT
2. A2 ID THR
No. 51778
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(3)
Method of Setting
Method of Sett i ng
"
[VCO]
1 Key
1 Key
INFORMATION ( ) Key
1.IF
・・・・・・・・・・・・・・・・・・・・・・・・・・・・ *
・・・・・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・・・・・・・
i
・・・・・・
It must not adjust without sig n al. Select 1.IF. Select 1. VC O (CW) Check the arrow position between ABOVE REF. and BELOW REF. Return to the SERVICE MENU screen.
Method of setting
"
5 Key
①2~
FUNCTION UP/DOWN Key
FUNCTION -/+
MENU (OK) Key
INFORMATION ( ) Key
Can not setting
"
(4)
Release of SERVICE MENU
1) After completing the setting, return to the SERVICE MENU, then again press the INFORMATION (OK) key.
2.V/C, 3.AUDIO, 4.DEF
・・・・・・・・・・・・・・・・・・・・・・
・・・・・
・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・
i
6. STATUS, 7. PIP, 8. --- , 9. SHIPPING(ON) & 0. BUS FREE.
・・・・・・
and
5.VSM PRESET.
Select on e from Select setting items. Set (adjust) the setting values of the setting items. Memorize the setting value. (Before storing the setting values in memory, do not press the CH, TV, POWER ON / OFF key -
if you do, the values will not be stored in memory.) Return to the
2. V/C, 3. AUDIO, 4. DEF
SERVICE MENU
screen.
and
5. VSM PRESET
.
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ADJUSTMENT
)
CHECKING ITEM
V28L2EUG
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Item
Measuring
instrument
Check of B 1 Power Supply
Signal Generator
DC voltmeter
Remote Control unit
Check of Hi gh Voltage
Signal Generator
DC volunteer
Remote Control unit
Check of VC O Remote
control unit
IF SERVICE MENU
1. VCO
2. ATT ON/OFF
Test point Adjustment part Descrip tion
TP-91(B1) TP-E(
)
####
[X connector on POWER DEF P WB]
1. RGB BLK
1. Receive any br oad cast.
2. Press the ZOOM key and select the FULL mode.
3. Select 2. V/C from the SERVICE MENU.
4. Select 1. RGB BLK with function UP / DOWN key.
5. Pr ess the f uncti on +( ) key t o find t he cut off sc reen (B lack screen).
6. Connect a DC voltmeter to TP-91(B1) and TP-E(#).
7. Make sure that the voltage is DC139.9 ±2.0V.
8. Press the function – ( ) key to return to service menu.
CRT anode
1. RGB BLK
1. Receive any br oad cast.
2. Press the ZOOM key and select the FULL mode.
Chassis GND
3. Select 2. V/C from the SERVICE MENU.
4. Select 1. RGB BLK with function UP / DOWN key.
5. Pr ess the f uncti on +( ) key t o find t he cut off sc reen (B lack screen).
6. Connect a DC voltmeter to CRT ANODE and chassis GND.
7. Make sure that the voltage is DC 31.0kV .
8. Press the function – ( ) key to return to service menu.
1. VCO
Under norm al c ond iti ons , no adjus t m ent is r equ ired.
"
Confirmation adjustment.
"
1. Select 1.IF from the SERVICE MENU.
2. Then select 1.VCO from the IF SERVICE MENU.
3. Receive any broadcast .
(Do not move)
4. Check the arrow ( ) p osition b etween the ABOVE R EF. and BELOW REF.
+1kV
-1.5kV
1-2 : SELECT
TOO HIGH ABOVE REF JUST REF BELOW REF TOO LOW
VCO(CW
MAIN
i: EXIT
****
MHz
i : EXIT
No. 51778
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ADJUSTMENT OF FOCUS & SCREEN
Item
Adjustment of FOCUS
HVT
Adjustment of SCREEN VR
Measuring instrument
Signal generator
FOCUS 1 VR FOCUS 2 VR
SCREEN VR
Signal generator
1. RGB BLK
- / +
Test point Adjustment part Descrip tion
FOCUS 2 VR
V/C
: STORE i : EXIT
OK
0 0 0 0 0 1 0 0
PAL
00
FOCUS 1 VR FOCUS 2 VR
[In HVT]
FOCUS 1 VR
SCREEN VR (In HVT)
CLOW status
1. Receive a cross-hatch signal.
2. By t urning the FOC US 2 VR, adjus t the to make th e vertic al lines as fin e an d sh arp as p oss ib le.
3. By turning the F OC US 2 V R, ad jus t the pic t ure so t h at the 5t h vertic al line f rom left side of th e c ross-h atch pic tur e bec omes thinnest.
4. By turning the FOCUS 1 VR, adjust the 3rd horizontal line from the upper s id e may b ecome unif orm at th e line c ent er and its periphery.
5. Carry out adjus t m ent by r ep eat ing the st eps 3 and 4 ab ou t .
6. Make sure that wh en th e sc r een is d ark ened, t he l ines rem ain in good foc us .
1. Press a whole black signal .
2. Press the ZOOM key and select the FLL mode.
3. Select 2. V/C from the SERVICE MENU.
4. Rotate the SCREEN VR clockwise from the full counterclockwise position and stop it at the point where “CLOW” status (marked in Fig.) changes from 1 to 0 (which is indicated at the 3rd
“CLOW” : control l oop ou t of wi nd ow .
*
column from the right.)
SERVICE MODE SCREEN
VSM PRESET SETTING
Item
Setting of VSM PRESET
Settin
item
COOL NORMAL WARM
Measuring instrument
Remote control unit
VSM preset
mode
1.CONT. 2.BRIGHT 3.SHARP 4.COLOUR 5.HUE 6.WDR R 7.WDR G 8.WDR B
+16 0 -12 0 0 -25 -12 0
Test point Adjust m ent part Description
1. CONT.
2. BRI GHT
3. SHARP
4. COLOUR
5. HUE
6. WDR R
7. WDR G
8. WDR B
1. Select 5.VSM PRESET from the SERVICE MENU.
2. Select COOL with the MENU key of the remote control unit.
3. Adjust the FUNCTION UP/DOWN and -/+ key to bring the set val ues of 1 .CON T.~ 8. W DR B to the values shown in th e table.
4. Press the MEN U k ey and mem ori z e t h e s et value.
5. Respectively select the VSM PRESET mode for NORMAL and WAR M, and m ak e sim il ar ad jus t m ent as in 3 above.
6. Press the MEN U k ey and mem ori z e t h e s et value.
Refer to OPERATING INSTRUCTIONS for the PICTURE
$
MODE.
00-1200000
-13 0 -12 -1 0 +5 0 0
SETTING VALUES OF VSM PRESET
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VIDEO/CHROMA CIRCUIT ADJUSTM E NT
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.
V28L2EUG
V28L2EUBL
V28L2EUG
Colour system
Setting item
1.RGB BLK 7.COLOUR
2.WDR R
3.WDR G
4.WDR B
5.BRIGHT
6.CONTRAST
Item
Adjustment of WHITE BALANCE (High-Light)
Measuring
instrument
Signal generator
Remote control unit
Initial setting val ue Init i al settin g val ue
PAL SECAM
000
000
%
-012
000
000
Test point Adjustment part Desc ription
2.WDR R
3.WDR G
NTSC
Setting item
8.HUE
9.SHARP
10.VCO ADJUSTM ENT
11.V IDE O AG C
12.SYNC SLICE
Set the PICTURE MODE to NORMAL.
"
1. Receive a black an d whi te sign al (c olour off ).
2. Select 2. V/C from the SERVICE MENU.
3. Modify 2. WDR R and 3.WDR G data to adjust the white
4. Press the MENU k ey an d m em or i z e th e set value.
5. Change the contrast and brightness with the remote control up
marked
"
Colour system
PAL SECAM NTSC
000 000 000
%
+007
Automatically optimized
%
000
%
+007
balance ( high light ).
& down from low–light to high –l ight and ch ec k that the tracki n g of the white balance is good.
:Do not adjust
%
after adjus tment
020
Adjustment of SUB BR I GHT
Adjustment Of SU B CONTRAST.
Remote control unit
Remote control unit
5.BRIGHT
6.CONTRAST
No. 51778
1. Receive any broad cast.
2. Select 2.V/C from the SERVICE MENU.
3. Select 5.BRIGHT with the FUNCTION UP/DOWN key.
4. Set the initial setting value with the FUNCTION -/+ key.
5. If the brightness is not the best with th e initial setting value, make fin e adj us tm en t unt il y ou g et t h e bes t br ig ht n ess .
6. Press the MENU k ey an d m em or i z e th e set value.
1. Receive any broad cast.
2. Select 2.V/C from the SERVICE MENU.
3. Select 6.CONTRAST with the FUNCTION UP/DOWN key.
4. Set the initial setting value with t h e FUNCTION - or + key.
5. If the contrast is not the best with the initial setting value, make fine adjustment until you get the best contrast.
6. Press the MENU k ey an d m em or i z e th e set value.
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Item
Adjustment of SUB COLOUR
ⅠⅠⅠⅠ
Measuring
instrument
Remote control unit
Test point Adjustment p art Description
key
CH.
MENU
( OK ) key
7.COLOUR (PAL/SECAM/NTSC)
PAL COLOUR (PAL COLOUR)
SECAM COLOUR (SECAM COLOUR)
NTSC COLOUR
[Method of adjustment without measuring instrument]
1. Receive PAL broadcast.
2. Select 2.V/C from the SERVICE MENU.
3. Select 7.COLOUR with the FUNCTION UP/DOWN key.
4. Set the initial setting value for PAL COLOUR with the FUNCTION - or + key.
5. If the col our is not th e bes t with th e initi al set val ue, mak e fin e adjust m ent un t il you get t h e bes t c ol our .
6. Press the MENU k ey an d m em or i z e th e set value.
1. R ec eive a SEC AM broadcast.
2. Make fine adjustment of SECAM COLOUR in the same manner as for ab ov e.
(NTSC 3.58 COLOUR)
1. Input a NTSC 3. 58MHz C OMPOSIT E VIDEO s ignal fr om the EXT terminal.
2. M ake similar fine adjustment of NTSC 3.58 COLOUR in the same manner as for above.
(
INFORMATION
i
FUNCTION
) key
key
(NTSC 4.43 COLOUR)
1. R ec eive a NTSC 4.43MHz CO MPOSITE VIDEO signal from the EXT terminal.
2. Make similar fine adjustment of 4.43 COLOUR in the same manner as for ab ov e.
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Item
Adjustment of SUB COLOUR
ⅡⅡⅡⅡ
W
Measuring
instrument
Signal generator
Oscilloscope
Remote control unit
Cy Mg B
Test point Adjustment p art Description
TP-47B TP-E( [CRT SOCKET PWB ]
(A)
7.COLOUR (PAL/SECAM/NTSC)
)
####
PAL COLOUR (PAL COLOUR)
SECAM COLOUR (SECAM COLOUR)
(-)
NTSC COLOUR
0
(+)
[Method of adjustment using measuring instrument]
1. Receive a PAL full field colour bar signal(75% white).
2. Select 2.V/C from the SERVICE MENU.
3. Select 7.COLOUR with the FUNCTION UP/DOWN key.
4. Set the initial setting value of PAL COLOUR with the FUNCTION - or + key.
5. C onn ect th e osc i lloscope between T P-47B and TP -E
6. Adjust PAL COLOUR and bring the value of illustr ation to blue (B)).
7. Pr ess the ME NU k ey an d memori z e the settin g val ue.
1. Receive a SECAM full field colour bar signal(75% white).
2. Set the initial setting value of SECAM COLOUR with the
FUNCTION -/+ key.
3. Adjust SECAM COLOUR and bring the value of
illustr ation to
4. Pr ess the ME NU k ey an d memori z e the settin g val ue.
(NTSC 3.58 COLOUR)
1. Input a NT SC 3. 58MH z CO MPOSIT E VI DEO si gnal (f ull f ield
colour bar with 75% white) from the EXT terminal.
2. Set the initial s etting value of NTSC 3.58 COLOUR with th e
FUNCTION -/+ key.
3. Adjust NTS C 3.58 CO LOUR and bring t he val ue of
illustr ation to
4. Pr ess the ME NU k ey an d memori z e the settin g val ue.
(volt age diff erenc e between w hite (w) an d
+5V
(W~B).
+4V
(W~B).
+6V
(A)
(A)
(A)
in the
of the
of t h e
(NTSC 4.43 COLOUR)
1. Input a NT SC 4. 43MH z CO MPOSIT E VI DEO si gnal (f ull f ield
colour bar with 75% white) from the EXT terminal.
2. S et the initi al s etting val ue of NTSC 4.43 COLO UR with the
FUNCTION -/+ key.
3. Adjust NTS C 4.43 CO LOUR and bring t he val ue of
illustr ation to
4. Pr ess the ME NU k ey an d memori z e the settin g val ue.
+6V
(W~B).
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Item
Adjustment of SUB HUE
Adjustment of SUB HUE
ⅠⅠⅠⅠ
ⅡⅡⅡⅡ
Measuring
instrument
Remote control unit
Signal generator
Oscilloscope
Remote control unit
Test point Adjustment p art Description
8.HUE [Method of adjustment without measuring instrument]
TP-47B TP-E(
####
[CRT SOCKET PWB]
NTSC 3.58 HUE
NTSC 4.43 HUE [NTSC 4.43 HUE]
8.HUE [Method of adjustment using measuring instrument]
)
NTSC 3.58 HUE [NTSC 3.58 HUE]
[NTSC 3.58 HUE]
1. Input a NTSC 3.58MH z COMPO SITE VI DEO sign al (full f ield colour bar with 75% white) from the EXT terminal.
2. Select 2.V/C from the SERVICE MENU.
3. Select 8.HUE with the FUNCTION UP/DOWN key.
4. Set the initial setting value of NTSC 3.58 HUE with the FUNCTION -/+ key.
5. If you cannot get the best hue with the initial s etting value, make fin e adj us tm en t unt il y ou g et t h e bes t hu e.
6. Press the MEN U k ey and mem ori z e t h e s et value.
1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at
the respective values.
1. Input a N TSC 3.58 MHz CO MPOSITE V IDEO sign al (full f ield colour bar with 75% white) from the EXT terminal.
2. Select 2.V/C from the SERVICE MENU.
3. Select 8.HUE with the FUNCTION UP/DOWN key.
4. Set the initial setting value of NTSC 3.58 HUE with the FUNCTION - or + key.
5. C onn ect t h e osc i ll oscope bet w een TP -47B and TP- E
6. Adjust NTSC 3.58 HUE to bring the value of illustr ation to magenta(Mg)).
7. Press the MEN U k ey and memor i z e t h e s etting valu e
・・・・・・・・・・・・・・・・・
(voltage differenc e between white (W) and
-3V
(NTSC only)
(B)
in the
NTSC 4.43 HUE [NTSC 4.43 HUE]
(B)
W
Cy Mg B
Adjustment of VCO for colour decoder
Signal generator
Remote control unit
22
(-)
0
(+)
10. VCO
No. 51778
1. When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values.
1. Input a P AL full f ield colour bar si gnal (75% white) f rom the EXT terminal.
2. Select 2. V/C from the SERVICE MENU.
3. Select 10. VCO adjustment with the FUNCTION UP/DOWN key.
4. Press the OK key th en autom at ically opt i mi z ed.
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DEFLECTION CIRCUIT ADJUST MENT
There are 4 as pect modes ( and ( 3 ) 120Hz i mode
When the 10 0 Hz FUL L mo d e ha s bee n est ablished, the set ting of other modes wil l be do n e aut o matically .
"
However , if the pi c tu re qu ali t y has n ot been opti miz e d , adj u st each mod e ag a in, respect ively. 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.
"
Setting item
1.V- SHIFT -4 +8 +1 0 +8 +2 0 0
2.V-SIZE +700000-15 0
3.H-CENT -23 +4 -4 0 0 0 0 0
・・・・・
・・・・・・・・・
・・・・・・・・・・
100Hz i 60Hz p 100Hz i 60Hz p 100Hz i
FULL,
①①①①
depending upon the kind of signal s ( vertic al frequency 100Hzi / 60HZp / 120Hzi ).
FULL PANORAMIC SUBTITLE COMPRESS
PANORAMIC,
②②②②
SUBTITLE,
③③③③
Initial settin g val ue
COMPRESS) of the ad jus tm ent ( 1 ) 100Hz i m od e, ( 2 ) 6 0 Hz p
④④④④
60Hz p
100Hz i
V28L2EUG
V28L2EUBL
V28L2EUG
120Hz i
4.H-SIZE -27-4-40000 0
5.TRAPEZ -17 +13 0 0 0 0 0 0
6.EW-PIN -45 0 0 0 0 0 0 0
7.COR-PIN0000000 0
8.COR-UP 0 0 0 0 0 0 0 0
9.COR-LO -10 0 0 0 0 0 0 0
10.ANGLE0000000 0
11.BOW 0000000 0
12.V-S.CR +6 0 +5 0 +7 0 0 0
13.V-LIN -4 +4 -11 0 -22 0 0 0 Screen tone : Do not move fixed value.
%
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Item
Adjustment of V-SHIFT
Adjustment of V-SIZE
Screen
size
Measuring
instrument
Signal generator
Remote control unit
Test point Adjustment p art Description
1. V- SHIFT
A
B
2.V-SIZE
Screen size
Picture
size
100%
[FULL mode]
1. Receive a circ l e pattern sig n al of vert ical fr equency 50H z.
2. Select 4.DEF from the SERVICE MENU.
3. Select 1.V-SHIFT with the FUNCTION UP/DOWN key.
4. Adjust V-SHIFT to make
5. Check the adjustment value above in other zoom mode. If it is a wrong adjustm ent, re-adjus t in “PANORA MIC” mode and adjus t b y 1. V-SH I FT.
6. Press the MENU k ey an d m em or i z e the set valu e.
7. Receive a cross-hatch signal.
8. Select 2.V-SIZE and set the initial setting value.
9. Adj ust V-S IZE and mak e sure that t he ver tic al screen siz e of the picture size is in the bellow table.
10. Press the ME NU k ey an d m em o ri z e t h e s et value.
11. Input a NTSC VIDEO sign al (60Hz) from the EXT t er minal, and make sure that the vertic al screen size is in the table below.
12. Press the ME NU k ey an d m em o ri z e t h e s et value.
A = B
.
Picture size 100%
ASPECT
SCREEN POSITION
TOP
BOTTOM 92% 87% 83%
24
FULL PANORAMIC
92% 87% 70%
[ SCREEN SIZE ]
SUB TITLE
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Item
Adjustment of H.CENTER
Adjustment of H.SIZE
Measuring
instrument
Signal generator Remote control unit
CD
Test point Adjustment p art Description
3.H-CENT.
4.H-SIZE
13. Receive a cir c l e patt er n s ig n al.
14. Select 3.H-CENT and set the initial setting value.
15. Adjust H-CENT to make
16. Press the MEN U k ey an d m em or i z e the set valu e.
17. Receive a cross-hatch signal.
18. Select 4.H-SIZE and set the initial setting value.
19. Adjust H -SIZE and make sur e t hat t he hori zontal s cr een s ize of the picture size is in the bellow table.
20. Press the MEN U k ey an d m em or i z e the set valu e.
21. Input a NTSC VIDEO signal (60Hz) from the EXT terminal, and make sure that the horizontal screen size is in the table below.
22. Press the MEN U k ey an d m em or i z e the set valu e.
C=D
.
ASPECT
MODE
H SIZE
Adjustment of EW-PIN
FULL PANORAMIC
92% 95% 92%
[ SCREEN SIZE ]
6.EW-PIN
Straight
SUBTITLE
23. Select 6.E W-PIN and set the initial setting value
24. Adjus t EW- PIN and mak e th e 2nd . vertic al li n es at t he l eft and right edg es of t h e s c reen straight . Als o m ak e s ur e that th e 3r d vertical lines are straight.
25. Press the MEN U k ey an d m em or i z e the set valu e.
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Item
Adjustment of TRAPEZ
Adjustment of CORNER UP/ LOW
Measuring
instrument
Signal generator Remote control unit
Signal generator Remote control unit
Straight Straight
Test point Adjustment p art Description
5.TRAPEZ
Parallel
7.COR-PIN
8.COR-UP
9.COR-LO
26. Receive a cross-hatch signal.
27. Select 5.TRAPEZ with the FUNCTION UP/DOWN key.
28. Set the initial setting value of TRAPEZ with the FUNCTION ­or + key.
29. Adjust T RAPEZ and bring the VERTICAL lines at the right and left edges of the screen parallel .
30. Press the MEN U k ey an d m em or i z e the set valu e.
31. Select 9.COR-LO with the FUNCTION UP / DOWN key.
32. Set the initial setting value of COR-LO with the FUNCTION –
or + key.
33. Adjust COR-LO, and bring the straight line at the low corner.
34. Select 8.COR-UP with the FUNCTION UP / DOWN key.
35. Set the initial setting value of COR-UP with the FUNCTION –
or + key.
36. Adjust COR-UP, and bring the straight line at the upper
corner.
37. If the extrem e upper & lower corners and a litt le pin or barr el,
chose 7.CO R -PIN and adj ust. And adjust to get the straight. Store the set value.
Adjustment of ANGLE
Signal generator Remote control unit
26
10.ANGLE
No. 51778
In case where there is a parallelogrammical distortion of
"
images on the screen. (Fig. A)
38. Select 10.ANGLE with the FUNCTION UP / DOWN key.
39. Adjust ANGLE, and bring the VERTICAL lines straight.
40. Press the MEN U k ey an d m em or i z e the set valu e.
Fig. A
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Item
Adjustment of BOW
Adjustment of V-S.CR & V.LINE
Measuring
instrument
Signal generator Remote control unit
Test point Adjustment p art Description
11.BOW
Fig. C
12.V-S.CR
13.V.LIN.
TOP
CENTER
In c ase where t here is a bow-sh aped dist ortion of im ages on
"
the screen. (Fig.C)
41. Select 11.BOW with the FUNCTION UP/DOWN key.
42. Adjust BOW, and bring the VERTICAL lines straight.
43. Press the MEN U k ey an d m em or i z e the set valu e.
When the ver tic al linear ity has been deter iorat ed rem ark ably,
!
perform the following steps.
44. Receive a cross-hatch signal.
45. Select 13. V.LIN with the FUNCTION UP / DOWN key.
46. Set the initial setting value of 13. V.LIN with the FUNCTION
- / + key.
47. Select 12. V-S.CR. with the FUNCTION UP / DOWN key.
48. Set the initial setting value of 12. V-S.CR. with the FUNCTION
- / + key.
49. Adjust 13. V .LIN and 12. V -S.CR . so that th e spac es of each line on TOP, C EN T E R , an d BOTTOM b ec om e u niform.
BOTTOM
NOTE : Do not adjust “PANORAMIC” & “SUBTITLE” mode.
At first t he adjus tm ent in 1 00Hz FUL L mo de sh ould b e done,
then th e data for th e other aspect mode is corrected in the respect ive valu e at th e same tim e. And c onfirm t he defl ection adjust ment initial s etting value in 12 0Hz (NTSC EXT mod e) FULL mode. If the adjustment in 1 00Hz each aspect mod e has been don e and st ored, the dat a for the s ame as pect m odes in 120Hz is c orrect ed in the r espect ive value. O nly th e data f or the other as pect mode in 120Hz is c orr ec t ed f or itself.
No. 51778
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AUDIO CIRCUIT ADJUSTMENT
Do not touch
"
If values had changed for the some reason, set the initial values in the following table.
3. AUDIO(Do not ad j ust)
1. ERR LIMIT 00H~FFH 10H
3. AUDIO
Sett ing item Variable ran ge fixed value
adjust m ent of t h e SER V IC E MENU as it req uires no ad jus tment.
2. A2 ID THR
00H~FFH
19H
28
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REPLACEMENT OF CHIP COMPONENT
CAUTIONS
!
1. Avoid heating for more than 3 seconds.
2. Do not rub the electrodes and the resist parts of the pattern.
3. When removing a chip part, melt the solder adequately.
4. Do not reuse a chip part aft er r em ovi n g it.
SOLDERING IRON
!
1. Use a high insulat i on s old er in g iron with a thi n p oint ed end of it.
2. A 30w soldering iron is recommended for easily removing parts.
REPLACEMEN T STEPS
!
How to remove Chip parts
1. Resistors, capacitors, etc
####
(1) As shown in the figure, push the part with tweezers and
alternately m elt th e s older at each en d.
(2) S hif t wi th tweezers and remo ve th e ch ip part.
Transistors, diodes, variable resistors, etc
####
(1) Apply extra solder to each lead.
V28L2EUG
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V28L2EUG
2. Ho w to install Chip parts
Resistors, capacitors, etc
####
(1) Apply solder to the pattern as indicated in the figure.
(2) Grasp th e chip part with tw eezers and pl ace it on th e sold er.
Then heat an d m elt t h e s old er at b oth en ds of th e 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
as indicated in the figure.
A
SOLDER
(2) As shown in the figure, push the part with tweezers and
alternat el y melt t he s old er at each lead . Shif t and r emov e th e chip part.
Note : After removing the part, remove remaining solder from the
pattern.
SOLDER
No.51778
A
C
(4) Then solder leads
A
C
and C.
B
B
B
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No. 51778
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V
ICTOR COMPANY OF JAPAN, LIMITED
HOME AV NETWORK BUSINESS UNIT 12, 3-chome, Moriya-cho, Knagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan
AV28L2EUGR-U #4
AV28L2EUBL-U #3
AV28L2EUGY-U #3
Printed in Japan VP 0105 DP105851
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