Funai TV-2000A Schematic

SERVICE MANUAL

20" COLOR TELEVISION

TV-2000A MK12

IMPORTANT SAFETY NOTICE

Proper service and repair is important to the safe, reliable operation of all Funai Equipment. The service procedures recommended by Funai 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 important 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 Fuction........................................................ 10-1

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

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

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

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

SPECIFICATIONS

< TUNER>

Description Condition Unit Nominal Limit

1. Intermediate Freq. Picture

2. Peak Picture Sens VHF

3. AFT Pull In Range (10mV input)

ANT. Input ------------------------- 75ohm Unbal., F type Reference Level ----------------- 20Vp-p (CRT Green Cathode) Test Input Signal ----------------- 400Hz 30% modulation

Sound(B/G)

(D/K)

CATV

UHF

—MHz± 2.3

MHz MHz MHz

dBµV dBµV dBµV

38.0

32.5

31.5 15

15 15

< DEFLECTION>

Description Condition Unit Nominal Limit

1. Deflection Freq. Horizontal

Vertical(PAL)

(NTSC)

2. Linearity Horizontal Vertical

3. Over Scan — % 10 —

4. High Voltage — KV 26 —

KHz

Hz Hz

% %

15.625(PAL)

15.750(NTSC) 50 60

— —

30 30 40

0.7

— —

< VIDEO & CHROMA>

Description Condition Unit Nominal Limit

1. Misconvergence Center

2. Brightness APL 100% Ft-L 40 25

3. Color Temperature — °K 8000°K-10MPCD —

4. Resolution Horizontal

<AUDIO>

Description Condition Unit Nominal Limit

1. Audio Output Power 10% THD W 3 2.7

2. Audio Distortion (w/LPF) 500mW % 2 5

3. Audio Freq. Response

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.

Side

Corner

Vertical

−

3dB Hz 100~10K —

mm mm mm

Line Line

— — —

350 400

0.4

1.5

2.1

— —

1-1 L1700SP

IMPORTANT SAFETY PRECAUTIONS

Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, 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 customer,

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

Be sure that no built-in protective devices are defec-

tive and have been defeated during servicing. (1) Protective shields are provided on this chassis to protect both the technician and the customer. Correctly replace all missing protective shields, including any removed for servicing convenience. (2) When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place all protective devices, including but not limited to, nonmetallic control knobs, insulating fishpapers, adjustment and compartment covers/shields, and isolation resistor/capacitor networks.

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.

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 limited 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 -

plug removed from any AC source, connect an electrical jumper across the two AC plug prongs. Place the instrument AC switch in the on position. Connect one lead of an ohmmeter to the AC plug prongs tied together and touch the other ohmmeter 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 megohm or greater than 5.2 megohm, an abnormality exists that must be corrected before the instrument is returned to the customer. Repeat this test with the instrument AC switch in the off position.

d.Leakage Current Hot Check -

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

always make a safety check of the entire

Do not operate

With the instrument AC

With the instru-

current tester or a metering system that complies with American National Standards Institute (ANSI) C101.1 Leakage Current for Appliances and Underwriters Laboratories (UL) 1410, (50.7). With the instrument AC switch first in the on position and then in the off position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the instrument (antennas, handle brackets, metal cabinet, screw heads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milli-ampere. Reverse the instrument power cord plug in the 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 NOT WITHIN THE LIMITS 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.

CURRENT

TESTER

EARTH

GROUND

e.X-Radiation and High Voltage Limits -

cause the picture tube is the primary potential source of X-radiation in solid-state TV receivers, it is specially constructed to prohibit X-radiation emissions. For continued X-radiation protection, 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 measured each time servicing

Be-

2-1 SFTYP_01

is performed that involves B+, horizontal deflection or high voltage. Correct operation of the X-radiation protection circuits also must be reconfirmed each time they are serviced. (X-radiation protection circuits also may be called "horizontal disable" or "hold down.") Read and apply the high voltage limits and, if the chassis is so equipped, the X-radiation protection circuit specifications given on instrument labels and in the Product Safety & X-Radiation Warning note on the service data chassis schematic. High voltage is maintained within specified limits by close tolerance safety-related components/adjustments in the high-voltage circuit. If high voltage exceeds specified limits, check each component specified on the chassis schematic and take corrective action.

Read and comply with all caution and safety-related

notes on or inside the receiver cabinet, on the receiver chassis, or on the picture tube.

3.Design Alteration Warning -

to the mechanical or electrical design of this TV receiver. Design alterations and additions, including, but not limited to circuit modifications and the addition of items such as auxiliary audio and/or video output connections, might alter the safety characteristics of this receiver and create a hazard to the user. Any design alterations or additions will void the manufacturer’s warranty and may make you, the servicer, responsible for personal injury or property damage resulting therefrom.

Do not alter or add

4.Picture Tube Implosion Protection Warning

The picture tube in this receiver employs integral implosion protection. For continued implosion protection, replace the picture tube only with one of the same type number. Do not remove, install, or otherwise handle the picture tube in any manner without first putting on shatterproof goggles equipped with side shields. People not so equipped must be kept safely away while picture tubes are handled. Keep the picture tube away from your body. Do not handle the picture tube by its neck. Some "in-line" picture tubes are equipped with a permanently attached deflection yoke; because of potential hazard, do not try to remove such "permanently attached" yokes from the picture tube.

5.Hot Chassis Warning -

Some TV receiver chassis are electrically con-

nected directly to one conductor of the AC power cord and may be safety-serviced without an isolation transformer only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC power source. To confirm that the AC power plug is inserted 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.

Some TV receiver chassis normally have 85V

AC(RMS) between chassis 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 source, for both personnel and test equipment protection.

Some TV receiver chassis have a secondary ground

system in addition to the main chassis ground. This secondary ground system is not isolated from the AC power line. The two ground systems are electrically separated by insulation material that must not be defeated or altered.

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 wiring. Always inspect in all areas for pinched, out of place, or frayed wiring. Check AC power cord for damage.

Components, parts, and/or wiring that appear to

have overheated or are otherwise damaged should be replaced with components, parts, or wiring that meet original specifications. Additionally, determine the cause of overheating and/or damage and, if necessary, take corrective action to remove any potential safety hazard.

8.Product Safety Notice -

mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing 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 shock, fire, and/or other hazards. The product’s safety is under review continuously and new instructions are issued whenever appropriate. Prior to shipment 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. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

Some electrical and

2-2 SFTYP_01

Precautions during Servicing

Parts identified by the ( ! ) symbol are critical for

safety. Replace only with part number specified. In addition to safety, other parts and assemblies are

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

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

Use specified internal wiring. Note especially:

1)Wires covered with PVC tubing

2)Double insulated wires

3)High voltage leads Use specified insulating materials for hazardous live

parts. Note especially:

1)Insulation Tape

2)PVC tubing

3)Spacers

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

(transformers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.

Observe that the wires do not contact heat produc-

ing parts (heatsinks, oxide metal film resistors, fusible resistors, etc.)

Check that replaced wires do not contact sharp

edged or pointed parts. When a power cord has been replaced, check that

5~6 kg of force in any direction will not loosen it. Also check areas surrounding repaired locations.

Use care that foreign objects (screws, solder drop-

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

The power transformer uses crimp type connectors which connect the power cord and the primary side of the transformer. When replacing the transformer, follow these steps carefully and precisely to prevent shock hazards.

Replacement procedure

1)Remove the old connector by cutting 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 ends 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.

When connecting or disconnecting the internal con-

nectors, first, disconnect the AC plug from the AC supply outlet.

2-3 SFTYP_01

Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance 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

Chassis or Secondary Conductor

Primary Circuit Terminals

dd'

AC Line Voltage Clearance Distance (d) (d’)

≥

110 to 240 V

This table is unofficial and for reference only. Be

Note:

sure to confirm the precise values.

3mm(d)

≥

6 mm(d’)

2. Leakage Current Test

Confirm the specified (or lower) leakage current between B (earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) is lower than or equal to the specified 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.

Table 2 : Leakage current ratings for selected areas

1.5kΩ

Exposed Accessible Part

0.15µF

Earth Ground

Power Cord Plug Prongs

Fig. 1

AC Voltmeter (High Impedance)

Fig. 2

AC Line Voltage Load Z Leakage Current (i)

2kΩ RES.

Connected in

110 to 240 V

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

Note:

parallel

50kΩ RES.

Connected in

parallel

i≤0.7mA AC Peak

i≤2mA DC

i≤0.7mA AC Peak

i≤2mA DC

2-4 SFTYP_01

One side of power cord plug

prongs (B) to:

RF or

Antenna terminals

A/V Input, Output

STANDARD NOTES FOR SERVICING

Circuit Board Indications

a.The output pin of the 3 pin Regulator ICs is indicated

as shown.

Top View

Out

b.For other ICs, pin 1 and every fifth pin are indicated

as shown.

Input

Pin 1

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

shown.

Bottom View

(2)Remove the flat pack-IC with tweezers while apply-

ing the hot air.

(3)Bottom of the flat pack-IC is fixed with glue 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 tweez-

ers. (Fig. S-1-6)

Caution:

1.Do not supply hot air to the chip parts around 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 protect other parts from damage. (Fig. S-1-2)

2.The flat pack-IC on the CBA is affixed with glue, so be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it.

Hot-air Flat Pack-IC Desoldering Machine

CBA

Pin 1

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 SFTY_08

With Soldering Iron:

(1)Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-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 pack-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 tweez-

ers. (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

Sharp Pin

Fine Tip Soldering Iron

Fig. S-1-4

(3)Bottom of the flat pack-IC is fixed with glue 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 tweez-

ers. (Fig. S-1-6)

With Iron Wire:

(1)Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-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 fixed with glue to the

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

To Solid Mounting Point

CBA

Tweezers

Fig. S-1-5

Fine Tip Soldeing Iron

Flat Pack-IC

Fig. S-1-6

3-2 SFTY_08

2. Installation

(1)Using desoldering braid, remove the solder from the

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

(2)The " ● " mark on the flat pack-IC indicates 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 caused by electrostatic charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity that may be charged on the body.

2. Ground for Workbench

Be sure to place a conductive sheet or copper plate with proper grounding (1MΩ) on the workbench or other surface, where the semiconductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semiconductors with your clothing.

< Incorrect >

CBA

Presolder

Flat Pack-IC

CBA

< Correct >

Grounding Band

Fig. S-1-8

1MΩ

CBA

1MΩ

Conductive Sheet or Copper Plate

3-3 SFTY_08

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

This flowchart indicates the disassembly steps for the cabinet parts, and the CBA in order to gain access to item(s) to be serviced. When reassembling, 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 [3] Main CBA 3,5 CN571 3 [4] CRT 4 4(S-2), Anode Cap 4

↓↓↓ ↓ ↓

Part

Rear Cabinet

Fig.

1,2

➀➁➂ ➃ ➄

Remove/*unlock/

release/unplug/

unclamp/desolder

5(S-1), 1(S-3)

, 1(S-4)

Note

Note :

Order of steps in procedure. When reassembling,

➀

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

Parts to be removed or installed.

➁

Fig. No. showing procedure of part location

➂

Identification of part to be removed, unhooked, un-

➃

locked, released, unplugged, unclamped, or desoldered.

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

2(S-2) = two Screws (S-2) Refer to the following "Reference Notes in the

➄

Table."

Reference Notes in the Table

1.Removal of the Rear Cabinet. Remove screws 5(S-1) and (S-3) 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 CBA. Disconnect CN571 on the Main CBA then slide the Main CBA backward.

Caution !

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

4.Removal of the CRT. Remove screws 4(S-2) and Anode Cap. then slide the CRT backward.

4-1 L1700DC

S-1

AUDIO

OUT

VIDEO

L(MONO)

S-3S-4

S-1

[1] Rear Cabinet

[3]Main CBA

ANT.IN

Front Cabinet

Control Plate

Fig. 1 Fig. 3

Control Plate

S-1

[1]Rear Cabinet

Front Cabinet

S-1

Control Plate

Degauss Holder

CRT Ground Wire

S-2

[4]CRT

Front Cabinet

Anode Cap

Degaussing Coil

[2]CRT CBA

S-2

Fig. 2

Fig. 4

4-2 L1700DC

TV Cable Wiring Diagram

L691 DEGAUSSING COIL

MAIN CBA

CN802

SP802

CLN802

SP801

CLN801

CN801

AC601 AC CORD

CN691

FLYBACK TRANSFORMER

T571

CN571

WH501A

FOCUS

SCREEN

TU1 TUNER

WH301A

JK501

WH301B

WH501B

ANODE

CN501

TO CRT GROUND

4-3 L1700DC

Fig. 5

ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note: "CBA" is abbreviation for "Circuit Board Assembly".

NOTE:

Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments 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. N0121UD or N0134UD

6.DC power supply 13.2V/5A

How to make Service remote control unit:

1. Prepare normal remote control unit. (Part No. N0121UD or N0134UD) Remove 3 Screws from the back lid. (Fig. 1-1)

2.Added J1 (Jumper Wire) to the remote control CBA. (Fig. 1-2)

SCREWS

REMOTE CONTROL UNIT

J 1

REMOTE CONTROL CBA

Fig. 1-1

Fig. 1-2

How to set up the service mode:

Service mode:

1.Use the service remote control unit.

2.Turn the power on. (Use main power on the TV unit.)

3.Press " SLEEP " button on the service remote control unit. Version of micro computer will display on the CRT. (Ex: 056-0.07)

4.When CPU version is 054-0.13: Check the display on the lower left is "00" and if it is not "00", set it at "00" according to "3-1 FRENCH, ACCESS CODE, VIDEO TONE".

When CPU version is 200-0.07: Confirm that the character of U ( U.S.A. model ) is indicated on the bottom left of the CRT. If the character of C ( CANADA model ) is indicated, perform "3-1 Setting for FRENCH data Values".

1. DC 105V Adjustment

Purpose: Symptom of Misadjustment:

the unit does not operate correctly.

Test Point Adj. Point Mode Input

Note:

1.Connect DC Volt Meter to TP601 and TP300(GND).

2. Adjust VR661 so that the voltage of TP601 becomes

To obtain correct operation.

The picture is dark and

TP601 TP300 (GND)

Tape M. EQ. Spec.

--- DC Voltmeter +114±1.0V DC.

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

+113±1.0V DC.

VR661 --- ---

2. Black Strech Control Adjustment

Purpose: Symptom of Misadjustment:

pear correctly.

Note:

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

2.Press " 6 " button on the Service remote control unit.

3.Press " CH ▲ / ▼ " buttons on the Service remote

4.Press " 6 " button on the Service remote control unit.

5.Press " CH ▲ / ▼ " buttons on the Service remote

6.Turn the power off and on again.

To show the fine black color.

Black color will not ap-

Use Service remote control unit.

" B-S " is indicated.

control unit so that display will change " OFF ", " 0 ", " 1 ", " 2 " and " 3 ". Then choose " B-S OFF ".

" B-S*2 " is indicated.

control unit so that display will change " 0", " 1 ". " 2 " and " 3 ". Then choose " B-S*2 0".

(Main power button on the TV unit.)

5-1 L1700EA

3-1. Setting for 7F, H/L STEP, TV DELAY, SOUND SYS, BAND SELECT, VIF FREQUENCY and RF AMP data Values

General

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

2.Press " VOL ▼ " button on the Service remote control unit. Display changes "C/D/SCM B-L", "VCO", "7F", "H/L STEP", "TV DELAY", "SOUND SYSTEM", "VHFL/VHFH/UHF", "VIF FREQ"and "RF AMP" cyclically when " VOL ▼ " button is pressed.

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

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

H/L STEP

1.Press " VOL ▼ " button on the Service remote control unit. Then select H/L STEP display.

2.Press "1" button, you can select H-STEP(R). Press "2" button, you can select H-STEP(B). Press "3" button, you can select L-STEP(R). Press "4" button, you can select L-STEP(B). Press " CH ▲ / ▼ " button on the Service remote

control unit. Then choose: H-STEP(R)=2 H-STEP(B)=12 L-STEP(R)=2 L-STEP(B)=8

TV DELAY

1.Press " VOL ▼ " button on the Service remote control unit. Then select TV DELAY display.

2.Press "1" button, you can select PAL DELAY. Press "2" button, you can select SECAM DELAY. Press " CH ▲ / ▼ " button on the Service remote

control unit. Then choose: PAL DELAY=2 SECAM DELAY=7

SOUND SYS

1.Press " VOL ▼ " button on the Service remote control unit. Then select SOUND SYS display.

2.Press " CH ▲ / ▼ " buttons on the Service remote control unit. Then choose SOUND SYS=OFF.

BAND SELECT

1.Press " VOL ▼ " button on the Service remote control unit. Then select VHFL/VHFH/UHF , VHFL/VHFH, VHFH/UHF or UHF display.

2.Press " CH ▲ / ▼ " buttons on the Service remote control unit. Then choose VHFL/VHFH/UHF.

VIF FREQUENCY

1.Press " VOL ▼ " button on the Service remote control unit. Then select VIF FREQ display.

2.Press " CH ▲ / ▼ " buttons on the Service remote control unit. Then choose VIF FREQ=38.

RF AMP

1.Press " VOL ▼ " button on the Service remote control unit. Then select RF AMP display.

2.Press " CH ▲ / ▼ " buttons on the Service remote control unit. Then choose RF AMP=OFF.

Note: C/D

at this moment.

and

data values are no need to adjust

VCO

3-2. Setting for CONTRAST, COLOUR AND TINT data Values

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

2.Press " PICTURE SELECT " button on the Service remote control unit. Display changes " BRIGHT ", " CONTRAST ", " COLOUR ", " TINT " cyclically when " PICTURE SELECT " button is pressed.

Press " CH ▲ / ▼ " buttons on the Service remote control unit so that the value of :

CONTRAST becomes 84 COLOUR becomes 52 TINT becomes 60

Note: BRIGHT

moment.

data value is no need to adjust at this

4. H fo Adjustment

Purpose: Symptom of Misadjustment:

correct, sqew distortion will appear on the screen.

Test Point Adj. Point Mode Input

Note:

Use Service remote control unit.

1.Connect Frequency Counter to TP302 and ground.

2.Set the unit to the VIDEO mode which is located

To get correct horizontal frequency.

. If H f

TP302

Tape M. EQ. Spec.

----

before CH2 and no input is necessary. Enter the Service mode. (See Page 5-1)

CH ▲ / ▼ button

["H-ADJ"] MODE

Frequency

Counter

TP302 --- Main CBA

adjustment is in

----

15.625 kHz±150Hz

5-2 L1700EA

3.Operate the unit for at least 20 minutes.

4.Press "2" button on the Service remote control unit and select H-ADJ Mode. (By pressing "2" button the display will change from TV AGC to H-ADJ)

5.Press " CH ▲ / ▼ " button on the Service remote control unit so that the display will change " 0 " ~ " 7 ". At this moment, Choose display one of them from " 0 " ~ " 7 " when the Frequency Counter shows 15.625 kHz±150Hz or closer.

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

5. VCO Adjustment

Purpose: Symptom of Misadjustment:

rectly and/or synchronization is faulty.

Test Point Adj. Point Mode Input

Note:

1. Disconnect the RF input and set the unit to Channel 4.

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

3.Press " 3 " button on the Service remote control unit.

4. If the display color is changed from red to green, This

5. Turn the Power off and on again. (Main power button

To operate VCO correctly.

VCO does not work cor-

--- --- No signal

Tape M. EQ. Spec.

--- --- ---

Use service remote control unit.

The Auto VCO adjustment is started.

adjustment is done.

on the TV unit.)

6. AGC Adjustment

Purpose: Symptom of Misadjustment:

nize correctly when RF input level is too weak and picture distortion may occur if it is too strong.

TP301 CH ▲ / ▼ buttons RF

Notes:

Use Service remote control unit.

1.Enter the Service mode. (See Page 5-1) Then

Set AGC (Auto Gain Control) Level.

AGC does not synchro-

Test

Point

Tape M. EQ. Spec.

---

TP301 --- Main CBA

press number " 2 " button on the Service remote control unit.

Adj. Point Mode Input

Pattern Generator

DC Volt Meter

+2.2±0.1VDC

Color Bar

62.25MHz 60dBµV

2.Receive the Color Bar signal for channel 4 (62.25MHz). (RF Input Level: 60dBµV)

3.Press " CH ▲ / ▼ " buttons so that the voltage of TP301 becomes +2.2±0.1V DC.

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

7. Black Level Adjustment

Purpose: Symptom of Misadjustment:

correct, Proper brightness can not be obtained by adjusting the Bright ness Control.

Note:

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

2. Press " MENU " button on the Service remote control

3.Press " CH ▲ / ▼ " buttons on the Service remote

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

Set Sub-bright Level

If Sub-brightness is in-

TP502, TP501 (GND) --- CRT CBA

unit and select " BRT "mode. (Display changes " BRT ", " CNT ", " CLR " and " TNT "cyclically when MENU button is pressed).

control unit so that the value of " BRT " becomes

128.

on the TV unit.)

8. C-Trap Adjustment

Purpose: Symptom of Misadjustment:

incorrect, stripes will appears on the screen.

Test Point Adj. Point Mode Input

Note:

Use Service remote control unit.

1.Connect Oscilloscope to TP502 and TP501 (GND).

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

3.Press " 0 " button on the Service remote control unit

4.Press " CH ▲ / ▼ " buttons on the Service remote

5.Turn the power off and on again. (Main power button

To get minimum leakage of the color signal carrier.

If C- Trap Adjustment is

TP502

(Blue) TP501 (GND)

Tape M. EQ. Spec.

---- Oscilloscope ----

color bar signal from RF Input.

and select C-TRP Mode.

control unit so that the display will change " 0 ", " 1 ", " 2 " and " 3 ". Choose display " 0 ", " 1 ", " 2 " or " 3 " when B-Out (3.58MHz) value becomes minimun on the oscilloscope reading.

on the TV unit.)

CH ▲ / ▼ buttons RF Color Bar

TP502, TP501 --- CRT CBA

5-3 L1700EA

+ 37 hidden pages