Duraband dct2703r schematic

SERVICE MANUAL

27" COLOR TELEVISION

DCT2703R

IMPORTANT SAFETY NOTICE

Proper service and repair is important to the safe, reliable operation of all Funai Equipment. The service procedures recommended by Fun ai and described in this service manual are effective methods of performing service operations. Some of these service special tools should be used when and as recommended.

It is important to note that this service manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It also is impo rtant to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. Funai could not possibly know, evaluate and advice the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way. Consequently, Funai has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by Funai must first use all precautions thoroughly so that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected.

TABLE OF CONTENTS

Specifications........................................................ 1-1

Important Safety Precautions................................ 2-1

Standard Notes for Servicing................................ 3-1

Disassembly Instructions ...................................... 4-1

Electrical Adjustment Instructions......................... 5-1

Block Diagram....................................................... 6-1

Schematic Diagram / CBA's and Test Points ....... 7-1

Schematic Diagram .............................................. 7-3

CBA Views and Test Points..................................7-11

Wave Forms.......................................................... 8-1

Wiring Diagram...................................................... 9-1

IC Pin Function.................................................... 10-1

Cabinet Exploded View ....................................... 11-1

Packing Exploded View....................................... 11-3

Mechanical Parts List .......................................... 12-1

Electrical Parts List.............................................. 13-1

SPECIFICATIONS

<TUNER> ANT. Input ------------------- 75ohm Unbal., F type

Reference Level ----------- 20Vp-p (CRT Green Cathode) Test Input Signal ---------- 400Hz 30% modulation

Description Condition Unit Nominal Limit

1. Intermediate Freq. Picture Sound

MHz MHz

45.75

41.25

2. Peak Picture Sens VHF

CATV

UHF

3. AFT Pull In Range (10mV input)

Description Condition Unit Nominal Limit

1. Deflection Freq. Horizontal

Vertical

2. Linearity Horizontal

Vertical

3. Over Scan

4. High Voltage

Description Condition Unit Nominal Limit

1. Misconvergence Center

Side

Corner

dBµv dBµv dBµv

MHz ±2.0 ±0.7

KHz

% %

%10

KV 29

mm mm mm

15 15 15

15.734 60

30 30 40

±15 ±10

0.4

1.5

2.1

2. Brightness APL 100% Ft-L 25 15

3. Color Temperature

4. Resolution Horizontal

<AUDIO>

Description Condition Unit Nominal Limit

1. Audio Output Power 10% THD W 1 0.8

2. Audio Distortion (w/LPF) 500mW % 2 7

3. Audio Freq. Response -3dB Hz 70~11K

Note:

Nominal specifications represent the design specifications. All units should be able to approximate these. Some will exceed and some may drop slightly below these specifications. Limit specifications represent the absolute worst condition that still might be considered acceptable. In no case should a unit fail to meet limit specifications.

All items are measured across 8Ω load at speaker output terminal.

Vertical

1-1 L6200SP

°K 9200°K

Line Line

250 300

IMPORTANT SAFETY PRECAUTIONS

Prior to shipment from the fact ory, our products are stri ctly insp ected for reco gnize d product sa fety and el ectric al codes of the countries in which they are to be sold. Howev er, in order to ma intain such c ompliance, it is equally important to implement the following precautions when a set is being serviced.

Safety Precautions for TV Circuit

1. Before returning an instrument to the custom-

er, alwa ys make a saf ety check of the entire instru-

ment, including, but not limited to, the following items:

a. Be sure that no built-in protective devices are de-

fective and have been defeated during servicing. (1) Protective shields ar e p rovided o n this ch ass i s to protect both the technician and the customer. Correctly replace all missing protective shields, including any removed for servicing convenience. (2) When reinstalli ng the cha ssis and/o r other assembly in the cabinet, be sure to put back in place all protective devices, including but not lim ited to, nonmetallic control knobs, insulating fishpapers, adjustment and com part ment covers/shields, and isolation resistor/capacitor networks. Do not oper-

ate this instrument or permit it to be operated without all protective devices correctly installed and functioning. Servicers who defeat safety features or fail to perform safety checks may be liable for any resulting damage.

b. Be sure that there are no cabinet openings through

which an adult or child might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not l imited to, (1) spacing between the picture tube and the cabinet mask, (2) excessively wide cabinet ventilation slots, and (3) an improperly fitted and/or incorrectly secured cabinet back cover.

c. Antenna Cold Check - With the instrument AC

plug removed from any AC source, connect an electrical jumper acr oss the two AC plug prongs. Place the instrumen t AC sw i tch in the o n position. Connect one lead of an oh mmeter to the A C plug prongs tied together and to uch the other ohmme ter lead in turn to each tuner antenna input exposed terminal screw and, if applicable, to the coaxial connector. If the measured resistance is less than 1.0 mego hm or greater than 5.2 m egohm, an abnormality exists that must be corrected before the instrument is r eturned to th e custo mer. Repeat this test with the ins trument AC switch in the off position.

d. Leakage Current Hot Check - With the instru-

ment completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer d uring this test.) Use a leak-

age current tester or a me tering sy stem tha t complies with American National Standards Institute (ANSI) C101.1 Leakage Current for Appliances and Underwriters Labor atories (UL) 1410, (50.7 ). With the instrument AC switc h first in the on posi tion and then in the o ff position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the ins trument (antennas, handle br ackets, metal cabi net, screw heads, metallic overlay s, control shafts, etc.) , especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not excee d 0.5 milli-ampere. Re verse the instrument power cord plug in t he outlet and repeat the test.

READING SHOULD NOT BE ABOVE 0.5 mA

LEAKAGE

DEVICE

BEING

TESTED

TEST ALL EXPOSED

METAL SURFACES

ALSO TEST WITH PLUG REVERSED USING AC ADAPTER PLUG AS REQUIRED

ANY MEASUREMENTS NO T WITHIN THE LIMI TS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE CUSTOMER OR BEFORE CONNECTING THE ANTENNA OR ACCESSORIES.

e. X-Radiation and High Voltage Limits - Because

the picture tube is the pri mary potent ial source of X-radiatio n in soli d-state TV receiver s, it is s pecially constructed to prohibit X-radiation emissions. For continued X-radiation pr otection, the replacement picture tube must be the same type as the original. Also, because the picture tube shields and mounting hardware perform an X-radiation protection function, they must be correctly in place. High voltage must be mea su re d ea ch tim e s er v ic-

CURRENT

TESTER

EARTH GROUND

2-1 L6115IMP

ing is performed that invol ves B+, horizontal de-

flection or high voltage. Correct operation of the Xradiation protection circuits also must be reconfirmed each time they are serviced. (X-radiation protection circuits also may be called "horiz ontal disable" or "hold down." ) R ead a nd a ppl y th e hi gh voltage limits a nd, if the chassis is so e quipped, the X-radiation protection circuit specifications given on instrument labe ls and i n the P roduct S afety & X-Radiation Warning note on the service data chassis schematic. High voltage is maintained within specified limits by close tolerance safety-related components/adjus tme nts in th e hig h-vo lta ge circuit. If high voltage exceeds specified limits, check each component specified on the chassis schematic and take corrective action.

2. Read and comply with all caution and safety-related notes on or inside th e receiver cabine t, on the receiver chassis, or on the picture tube.

3. Design Alteration Warning - Do not alter or add to the mechanical or electrical design of this TV receiver. Design alterations and additions, including, but not limited to circuit modificatio ns and the addition of items such as auxiliary audio and/or video output connections, mig ht alter the saf ety char acteristics of this receiver and create a hazard to the user. Any design alter ations or addition s will void the manufacturer's warr anty and may make you, the servicer, responsible for personal injury or property damage resulting therefrom.

4. Picture Tube Implosion Protection Warning - The picture tube in this receiver employs integral implosion protection. For continued implosion protection, replace the pic ture tube only with one of the same type numbe r. Do not rem ove, install , or otherwise handle the picture tube in any ma nner without first putting on shatterproof goggles equipped with side shields. People not so equipped must be ke pt safely away while p icture tubes are handled. Keep the picture tube away from your body. Do not handl e the pictur e tu be b y its neck. Some "in-line" picture tubes are equipped with a permanently at tached deflection yoke; be cause of potential hazard, do not try to remove such "permanently attac hed" yokes from the picture tube.

5. Hot Chassis Warning -

a. Some TV receiver chassis are electrically connect-

ed directly to one conduc tor of the AC power cord and maybe safety-serviced without an isolation transformer only i f the AC power plug i s inserted so that the chassis is connected to the ground side of the AC power source. To confi rm that the AC power plug is ins erted correctly, with an AC voltmeter, measure between the chassis and a known

earth ground. If a voltage reading in excess of 1.0V is obtained, remove and reinsert the AC power plug in the opposite polarity and again measure the voltage potential between the chassis and a known earth ground.

b. Some TV receiver chassis normally have 85V

AC(RMS) between ch assis and earth ground regardless of the AC plug polarity. This chassis can be safety-serviced only with an isolation transformer inserted in the power line between the receiver and the AC power so urce, fo r both personn el and test equipment protection.

c. Some TV receiver chassis have a secondary

ground system in addition to the main chassis ground. This se conda ry gro und s ystem is no t iso lated from the AC power line. The two ground systems are electrically separated by insulation material that must not be defeated or altered.

6. Observe original lead dress. Take extra care to assure correct lead dress in the following areas:a. near sharp edges,b. near thermally hot parts-be sure that leads and components do not touch thermally hot parts, c. the AC supply,d. high voltage, and,e. antenna wir ing. Al ways in sp ect in a ll are as for pinched, out of pl ace, or frayed wiring. C heck AC power cord for damage.

7. Components, parts, and/or wiring that appear to have overheated or are otherwise damaged should be replaced with components, parts, or wiring that meet origin al specifications. Additiona lly, determine the cause of ov erheating and/or damage and, if nece ss ar y, ta ke co rre cti ve ac ti on t o remove any potential safety hazard.

8. Product Safety Notice - Some electrical and mechanical parts have s pecia l safety- relat ed char acteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replaci ng them with components rated for higher voltage, wattage, etc.. Parts that have special safety characteristics are identified by a ( # ) on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might create sh ock, fire, and/or other hazards. The product's safety is under review continuously and new instructions are issued whenever appropriate . Prior to shi pment from the factory, our products are strictly inspected to confirm they comply with the recognized product safety and electrical codes of the countries in which they are to be sold. Howev er, in orde r to mai ntain such compliance , it is equally important to im plement the following precautions when a set is being serviced.

2-2 L6115IMP

Precautions during Servicing

A. Parts identified b y the ( # ) symbo l are c ritica l for

safety. Replace only with part number specified.

B. In addition to safety, othe r parts and assemblies

are specified for conformance with regulations applying to spurious radiati on. These must also be replaced only with specified replacements.

Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.

C. Use specified internal wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads D. Use specified insulating materials for hazardous

live parts. Note especially:

1) Insulation Tape

2) PVC tubing

3) Spacers

4) Insulators for transistors. E. When replacing AC primary side components

(transformers, power cord, etc.), wrap ends of wires securely abo ut the terminals before so ldering.

F. Observe that the wires do not contact heat produc-

ing parts (heatsinks, oxide metal film resistors, fusible resistor s, et c .)

G. Check that replaced wires do not contact sharp

edged or pointed parts.

H. When a power cord has been replaced, check that

5~6 kg of force in any direction will not loosen it. I. Also check areas surrounding repaired locations. J. Use care that foreign objects (screws, solder drop-

lets, etc.) do not remain inside the set. K. Crimp type wire connector

The power transform er uses crimp type connec-

tors which connect the power cord and the primary

side of the transformer. When replacing the trans-

former, follow these step s carefully and precis ely

to prevent shock hazards.

Replacement procedure

1) Remove the old connector by cutti ng the wires at

a point close to the connector.

Important: Do not re-use a connector (discard it).

2) Strip about 15 mm of the insulation from the end s

of the wires. If the wires are stranded, twist the

strands to avoid frayed conductors.

3) Align the lengths of the wires to be connected. Insert the wires fully into the connector.

4) Use the crimping tool to crimp the metal sleeve at the center position . Be sure to crimp fully to the complete closure of the tool.

L. When connecting or disconnecting the internal

connectors, first, discon nect the AC plug from the AC supply outlet.

2-3 L6115IMP

Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returne d to original positions. Afterwards, perform the following tests and confirm the spec ified values in order to verify compli ance with safety standards.

1. Clearance Distance

When replacing primary circuit components, confirm specified clearance distance ( d) and (d') between soldered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)

Table 1 : Ratings for selected area

AC Line Voltage Region

110 to 130 V

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

USA or

CANADA

Clearance

Distance (d) (d')

≥ 3.2 mm

(0.126 inches)

2. Leakage Current Test

Confirm the specified (or lower) leakage current between B (earth ground, power cord plu g prongs) and externally exposed accessible parts (RF terminals, antenna termina ls, video an d au dio in put and output te rminals, microphone jacks, earphone jacks, etc.) is lower than or equal to the spe cified value in the table below.

Measuring Method : (Power ON)

Insert load Z between B (earth ground, power cord plug prongs) and exposed accessible parts. Use an AC voltmeter to measure across both terminals of load Z. See Fig. 2 and following table.

1.5kΩ

Chassis or Secondary Conductor

Primary Circuit Terminals

dd'

Exposed Accessible Part

AC Voltmeter

0.15µF

Earth Ground

Power Cord Plug Prongs

(High Impedance)

Fig. 1

Fig. 2

Table 2 : Leakage current ratings for selected areas

AC Line Voltage Region Load Z Leakage Current (i) Earth Ground (B) to:

0.15µF CAP. & 1.5kΩ

110 to 130 V USA

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

RES. connected in

parallel

2-4 L6115IMP

i≤0.5mA rms

Exposed accessible

parts

STANDARD NOTES FOR SERVICING

Circuit Board Indications

a. The output pin of the 3 pin Regulator ICs is indicat-

ed as shown.

Top View

Out

b. For other IC s, pin 1 a nd ev er y fifth pin ar e in dic at -

ed as shown.

Pin 1

c. The 1st pin of every male connector is indicated as

shown.

Pin 1

Input

Bottom View

(2) Remove the flat pack-IC with tweez ers while ap-

plying the hot air.

(3) Bottom of the flat pack -IC is fix ed with glu e to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Caution:

1. Do no t supply hot air to the ch ip parts aroun d the flat pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protec t other par ts from damage. (Fig. S-1-2)

2. The flat pack-IC on the CBA is affixed with glue, so be careful not to br eak or d amage the foi l of ea ch pin or the solder lands u nder the IC when rem oving it.

Hot-air Flat Pack-IC Desoldering Machine

CBA

How to Remove / Install Flat Pack-IC

1. Removal

With Hot-Air Flat Pack-IC Desoldering Machine:

(1) Prepare the hot-air flat pack-IC desoldering ma-

chine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1)

Fig. S-1-1

Masking Tape

Tweezers

Flat Pack-IC

Fig. S-1-2

3-1 L6115STA

With Soldering Iron:

(1) Using desolderin g braid, remove the solder from

all pins of the flat pac k-IC. When you use solde r flux which is appl ied to all pins of the flat pa ck- IC, you can remove it easily. (Fig. S-1-3)

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig. S-1-3

(2) Lift each lead of the flat pac k-IC upward one by

one, using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine.(Fig. S-1-4)

soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(5) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Note:

When using a soldering iron, care must be taken to ensure that the flat pack -IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied.

Hot Air Blower

Iron Wire

Soldering Iron

To Solid Mounting Point

Fig. S-1-5

Sharp Pin

Fine Tip Soldering Iron

Fig. S-1-4

(3) Bottom of the flat pack-IC is fi xed with g lue to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

With Iron Wire:

(1) Using desolderin g braid, remove the solder from

all pins of the flat pac k-IC. When you use solde r flux which is appl ied to all pins of the flat pa ck- IC, you can remove it easily. (Fig. S-1-3)

(2) Affix the wire to a workbench or solid mounting

point, as shown in Fig. S-1-5.

(3) While heating the pins using a fine tip soldering

iron or hot air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig. S-1-5.

(4) Bottom of the flat pack-IC is fi xed with g lue to the

CBA; when removing entire flat pack-IC, first apply

CBA

Tweezers

Fine Tip Soldering Iron

Flat Pack-IC

Fig. S-1-6

3-2 L6115STA

2. Installation

(1) Using desolderin g braid, remove the solder from

the foil of each pin of the flat pac k-IC on the CBA so you can install a replacement flat pack-IC more easily.

(2) The "I" mark on the flat pack-IC indi cates pin 1.

(See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then pre- solder the four corners of the flat pack-IC. (See Fig. S-1-8.)

(3) Solder all pins of the flat pack-IC. Be sure that

none of the pins have solder bridges.

Example :

Pin 1 of the Flat Pack-IC is indicated by a " " mark.

Fig. S-1-7

Instructions for Handling Semiconductors

Electrostatic breakdown of the semiconductors may occur due to a potential difference c aused by electrostatic charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grounding band (1MΩ) tha t is properly grounded to rem ove any static electr ic i ty th at may be charged on the body.

2. Ground for Workbench

Be sure to place a conducti ve shee t o r copper plate with proper grounding (1MΩ) on the workbench or other surface, where the semiconductors are to be placed. Because the static electr icity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semiconductors with your clothing.

CBA

Presolder

Flat Pack-IC

Fig. S-1-8

1MΩ

CBA

Grounding Band

1MΩ

CBA

Conductive Sheet or Copper Plate

3-3 L6115STA

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

This flowchart indicates the disassembly steps for the cabinet par ts, and the CBA in order to gain ac cess to item(s) to be se r vic ed. W hen reass embling, follow the steps in reverse order. Bend, route and dress the cables as they were.

Caution !

When removing the CRT, be sure to discharge the Anode Lead of the CRT with the CRT Ground Wire before removing the Anode Cap.

[1] Rear Cabinet

[2] CRT CBA

[3] Main CBA

[4] CRT

2. Disassembly Method

Removal

Step/

Loc. No.

[1]

[2] CRT CBA 4,5 CN501 2 [3] Main CBA 3,5 CN571 3 [4] CR T 4 4(S-3), Anode Cap 4

Part

Rear Cabinet

Fig.

1,2

Remove/*unlock/

release/unplug/

unclamp/desolder

7(S-1), 1(S-2), 1(S-4)

Note

Note :

(1) Order of steps in procedu re. When reas sembling,

follow the steps in reverse order.These number s are also used as the Identification (location) No. of parts in figures.

(2) Parts to be removed or installed. (3) Fig. No. showing procedure of part location (4) Identification of part to be removed, unhooked, un-

locked, released, unplugged, unclamped, o r desoldered.

S=Screw, P=Spring, L=Locking Tab, CN=Connector, *=Unhook, Unlock, Release, Unplug, or Desolder

2(S-2) = two Screws (S-2)

(5) Refer to the following "Reference Notes in the

Table."

Reference Notes in the Table

1. Removal of the Rear Cabinet. Remove screws 7(S-1), 1(S-2) and 1(S-4) then slide the Rear Cabinet backward.

2. Removal of the CRT CBA. Disconnect CN501 then pull the CRT CBA backward.

3. Removal of the Main CB A. Disconne ct CN571 on the Main CBA then slide the Main CBA backward.

Caution:

Discharge the Anode Lead o f the CRT with the CRT Ground Wire before removing the Anode Cap.

4. Removal of the CR T. Remo ve sc rews 4(S- 3) and Anode Cap. then slide the CRT backward.

↓↓↓↓↓

(1) (2) (3) (4) (5)

4-1 L6601DC

S-1

S-4

S-1

S-2

[1] Rear Cabinet

S-1

Fig. 1

S-1

S-3

Anode Cap

[3] Main CBA

Fig. 3

[2] CRT CBA

S-1

[1] Rear Cabinet

S-2

S-4

S-1

Fig. 2

S-3

[4] CRT

Fig. 4

4-2 L6601DC

TV Cable Wiring Diagram

SP802

SP801

DG691 DEGAUSSING COIL

MAIN CBA

CN691

FLYBACK TRANSFORMER

T571

CLN802

CLN801

CN801

CN802

WH301A

TU1 TUNER

AC601 AC CORD

CN571

FOCUS

SCREEN

ANODE

WH501A

JK1501

CN1501

TO CRT GROUND

WH301B

WH501B

Fig. 5

4-3 L6601DC

ELECTRICAL ADJUSTMENT INSTRUCTIONS

General No te : "CBA" is abbreviation for "Circuit Board Assembly".

NOTE:

Electrical adjustm ent s ar e r equ ired after replacing circuit components a nd certain mechanic al parts. It is important to perform these adjustm ents only after all repairs and replacements have been completed. Also, do not attempt these adjustments unless the proper equipment is available.

Test Equipment Required

1. NTSC Pattern Generator (Color Bar W/White Window, Red Color, Dot Pattern, Gray Scale, Monoscope, Multi-Burst)

2. DC Voltmeter

3. Oscilloscope: Dual-trace with 10:1 probe, V-Range:0.001~50V/Div, F-Range:DC~AC-60MHz

4. Plastic Tip Driver

5. Remote control unit:Part No. N0127UD or N0132UD or N0105UD or N 01 08UD

6. DC power supply 13.2V/5A

How to make Service rem ote control unit:

Prepare normal remote control unit. (Part No. N0127UD or N0132UD or N0105UD or N0108UD) Remove 3 Screws from the back lid. (Fig. 1-1)

2 . Add J1 (Jumper Wire) to the remote control CBA.

(Fig. 1-2)

SCREWS

REMOTE CONTROL UNIT

Fig. 1-1

1. DC 120V Adjustment

Purpose: To obtain correct operation. Symptom of Misadjustment: The picture is dark and

the unit does not operate correctly.

Test Point Adj. Point Mode Input

TP601(+120) TP300(GND)

Tape M. EQ. Spec.

--- DC Voltmeter +120±0.5V DC.

Note:TP601, TP300(GND), VR661 --- Main CBA

1. Connect DC Volt M ete r t o TP6 01 an d TP300 (GN D).

2. Adjust VR661 so th at the voltage o f TP60 1 becomes +120±0.5V DC.

VR661 --- ---

2. Black Strech Control Adjustment

Purpose: To show the fine black color. Symptom of Misadjustment: Black color will not

appear correctly. Note: Use Service remote control unit.

1. Enter the Service mode. (See page 5-1)

2. P ress " 6 " button on the Servic e remote control unit. " B-S " is indicated.

3. Press " CH o / p " buttons on the Service remote control unit so that display will change " OFF ", " 0 ", " 1 ", " 2 " and " 3 ". Then choose " B-S OFF ".

4. P ress " 6 " button on the Servic e remote control unit. " B-S*2 " is indicated.

5. Press " CH o / p " buttons on the Service remote control unit so tha t display will change " 0 " and " 1 ". Then choose " B-S*2 0".

6. Turn the power off and on again. (Main power button on the TV unit.)

J 1

REMOTE CONTROL CBA

Fig. 1-2

5-1 L6605EA

3-1. Setting for 7F and FRENCH

data Values

General

1. Enter the Service mode. (See page 5-1)

2. Press " VOL p " button on the Service remote control uni t. Dis pla y c han ges " C /D ", " 7 F " , "FRENCH ", " ACCESS CODE ", " STEREO ", " VIDEO TONE ", " FM-MO DE ", a nd " V- OUT " cyclically when " VOL p " button is pressed.

1. Press " VOL p " button on the Service remote control unit. Then select 7F display.

2. Press " CH o / p " buttons on the Service remote control unit. Then choose 7F=FF.

FRENCH

1. Press " VOL p " button on the Service remote control unit. Then select FRENCH display.

2. Press " CH o / p " buttons on the Service remote control unit. Then choose FRENCH=ON.

TINT (TNT)

1. Press " MENU " butto n on th e Ser vice r emote control unit. Then select " TINT " (TNT) display.

2. Press " CH o / p " buttons on the Service remote control unit so that the value of " TINT " (TNT) becomes 62.

V-TINT (V-TNT)

1. Press " ME NU " but ton on the S ervi ce remo te control unit. Then select " V-TINT " (V-TNT) display.

2. Press " CH o / p " buttons on the Service remote control unit so that the value of " V-TINT " (V-TNT) becomes 59.

SHARP (SHARP)

1. Press " MENU " butto n on th e Ser vice r emote control unit. Then select " SHARP " (SHARP) display.

2. Press " CH o / p " buttons on the Service remote control unit so that the value of “ SHARP " (SHARP) becomes 47.

Note: BRIGHT data value does not need to be adjust-

ed at this moment.

ACCESS CODE ---- set to OFF VIDEO TONE ---- set to ON FM-MODE ---- set to OFF V-OUT ---- set to OFF STEREO ---- set to ON

Note: C/D and VCO data values do not need to be

adjusted at this moment.

3-2. Setting for CONTRAST,

COLOR, TINT, V-TINT and SHARP data Values

General

1. Enter the Service mode. (See page 5-1)

2. Press " MENU " button on the Service remote control unit. Display changes " BRIGHT ", " CONTRAST ", " COLOR ", " TINT ", " V-TINT " and " SHARP " cyclically when " MENU " button is presse d.

CONTRAST (CNT)

1. Press " MENU " button on the Se rvi c e rem o t e co ntrol unit. Then select " CONTRAST " (CNT) display.

2. Press " CH o / p " buttons on the Service remote control unit so that the value of " CONTRAST " (CNT) becomes 84.

COLOR (CLR)

1. Press " MENU " button on the Service remote control unit. Then select " COLOR " (CLR) display.

2. Press " CH o / p " buttons on the Service remote control unit so tha t the valu e of " COLO R " (CLR ) becomes 58.

4. Black Level Adjustment

Purpose: Set Black Level Symptom of Misadjustment: If black level is incor-

rect, Proper br ig htn ess c an not be o bta ine d by adj usting the Brightness Control .

1. Enter the Service mode. (See page 5-1).

2. Press " MENU " butto n on th e Ser vice r emote control unit and select " BRT "mode. (Display changes " BRT ", " CNT ", " CLR ", and " TNT " cyclically when MENU button is pressed).

3. Press " CH o / p " buttons on the Service remote control unit so that the value of " B RT " becomes

128.

4. Turn the power off and on again. (Main power button on the TV unit.)

5-2 L6605EA

5. V. Size Adjustment

Purpose: To obtain correct vertical width of screen image. Symptom of Misadjustment: If V. Size is incorrect, vertical

size of image on the screen may not be properly displayed.

Test Point Adj. Point Mode Input

Screen Cont rol

---

Tape M. EQ. Spec.

--- Monoscope 90±5%

Note: Use service remote control unit.

1. Operate the unit for at least 20 minutes.

2. Enter the Service mode. (See page 5-1)

3. Receive the Monoscope Pattern.

4. Press " 9 " button on the Service remote control unit and select " V- S " mode. (Di splay cha nges " V-S " and " V-P " cyclically when " 9 " button is pressed).

5. Press " CH o / p " buttons on the Service remote control unit so that the m onoscope pattern will be 90±5% of display size and the circle is round.

6. Turn the power off and on again. (Main power button on the TV unit.)

CH o / p

buttons [ V -S ]

Mode

Mono-

scope

6. V. Position Adjustment

Purpose: To obtain correct vertical width of screen

image. Symptom of misadjustment: If V. Position is incor-

rect, vertical height of image on the screen may not be properly displayed.

Test Point Adj. Point Mode Input

Screen Cont rol

---

Tape M. EQ. Spec.

--- Monoscope 90±5%

CH o / p

buttons [ V -P ]

Mode

Mono-

scope

7. H. Position Adjustment

Purpose: To obtain correct horizontal position of

screen image. Symptom of Misadjustment: If H. Position is incor-

rect, horizontal po sition of image on the screen may not be properly displayed.

Test Point Adj. Point Mode Input

Screen Control

---

Tape M. EQ. Spec.

--- Monoscope 90±5%

Note: Use Service remote control unit

1. Operate the unit for at least 20 minutes.

2. Enter the Service mode. (See page 5-1)

3. Receive the Monoscope Pattern.

4. Press " 8 " button on the remote control uni t and select " H-P "mode.

5. Press " CH o / p " buttons on the Service remote control unit so th at the mono scope patte rn will be 90±5% of display size and the circle is round.

6. Turn the Power off and on again. (Main power button on the TV unit.)

CH o / p

buttons [ H-P ]

Mode

Mono-

scope

8. H. Size Adjustment

Purpose: To obtain correct horizontal size of screen

image. Symptom of Misadjustment: If H. Size is incorrect, horizontal size of image on the screen may not be properly displayed.

Test Point Adj. Point Mode Input

--- VR562 RF

Tape M. EQ. Spec.

--- Monoscope 90±5%

Mono-

scope

Note: Use Service remote control unit

1. Operate the unit for at least 20 minutes.

2. Enter the Service Mode. (See page 5-1)

3. Receive the Monoscope Pattern.

4. Press " 9 " button on the Service remote control unit and select " V-P "mode. (Display change " V-S " and " V-P " cyclically when " 9 " button is pressed).

5. Press " CH o / p " buttons on the Service remote control unit so that the top and bottom of the monoscope pattern will be equal of each other.

6. Turn the Power off and on again. (Main power button on the TV unit.)

Note: Use Service remote control unit

1. Operate the unit for at least 20 minutes.

2. Receive the Monoscope Pattern.

3. Adjust V R562 so that the monoscop e pattern will

4. Turn the Power off and on again. (Main power but-

5-3 L6605EA

be 90±5% of display size and circle is round.

ton on the TV unit.)

+ 37 hidden pages

Duraband dct2703r schematic

Specifications and Main Features

Frequently Asked Questions

User Manual

SPECIFICATIONS

IMPORTANT SAFETY PRECAUTIONS

STANDARD NOTES FOR SERVICING

CABINET DISASSEMBLY INSTRUCTIONS

ELECTRICAL ADJUSTMENT INSTRUCTIONS