Symphonic SRT2223X Schematic

23" COLOR TELEVISION

SERVICE MANUAL

SRT2223X

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 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

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

MHz MHz

dBµv dBµv dBµv

MHz ±2.0 ±0.7

KHz

% %

%10

KV 28

45.75

41.25 15

15 15

15.734 60

30 40

±15 ±10

1. Misconvergence Center Side

Corner

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

mm mm mm

°K 9200°K

Line Line

250 300

0.4

1.5

2.1

1-1 L6550SP

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 instrum ent to the c ustom -

er, always make a safety check of the entire instru-

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

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

fective and have b een defeated during servicing. (1) Protective shields are provided on this chassis to protect both the technician an d the customer. Correctly replace all missing protective shields, including any removed for servicing convenience. (2) When reinstalli ng the c hassis an d/or othe r assembly in the cabinet, be sure to put back in place all protective de vices, in cluding bu t not li mited to, nonmetallic control knobs, insulating fishpapers, adjustment and compartment cove rs/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 meter ing syst em that com plies 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 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 AC CES SORI ES.

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 deflection 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 insp 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 conn ector by c utting the wire s at

a point close to the connector.

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

2) Strip about 15 mm of the ins ulation 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 con nected. Insert the wires fully into the connector.

4) Use the crimping tool to crim p the meta l 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 returned to original positions. Afterwards, perform th e fol lo wing tes ts and c on firm the specified values in orde r to verify comp liance with safety standards.

1. Clearance Distance

When replacing primary circuit components, confirm specified clearanc e distance (d) a nd (d') betwee n soldered terminals, and between terminals and surrounding metallic parts. (See Fig. 1)

T able 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 cor d plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, vid eo and audio input a nd outp ut terminals, microphone jacks, earphone jacks, etc.) is lower than or equal to the sp ecified 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

T able 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 ICs, pin 1 and ev er y fifth pin are indicat-

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 tweezers whi le ap-

plying 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 twee-

zers. (Fig. S-1-6)

Caution:

1. Do not supply hot air to the chip pa rts 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 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 desoldering braid, r emove 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 pack-IC up ward 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 fixe d with glue to t he

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 desoldering braid, r emove 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 fixe d with glue to t he

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 desoldering braid, r emove 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 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 pote ntial difference c aused by elec trostatic charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grou ndi ng ban d ( 1 MΩ) th at i s pr op erly grounded to remove any static electricity that may be charged on the body.

2. Ground for Workbench

Be sure to pla ce a conductive sheet or copp er plate with proper grounding (1MΩ) on the workbench or other surface, where the semiconductors are to be placed. Because th e static electrici ty charge on clothing will not es cape through the body gr ounding 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 indicate s the disassem bly steps for the cabinet parts, and the CBA in order to g ain access to item(s) to be servic ed. Wh en rea ssemb ling, fol low th e 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

Note :

(1) Order of steps in procedure. Wh en reassemb ling,

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, or 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 CN1501 then pull the CRT CBA backward.

2. Disassembly Method

Removal

Step/

Loc. No.

[1]

[2] CRT CBA 4,5 CN1501 2

[3] Main CBA 3,5

[4] CRT 4 4(S-3), CN691 4

Part

Rear Cabinet

Fig.

1,2

↓↓↓↓↓

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

Remove/*unlock/

release/unplug/

unclamp/desolder

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

CN571, CN801, CN802 (SRT2223S only), Anode Cap

Note

Caution !

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

3. Removal of the Main CBA. First, disconnect CN571 on the Main CBA. Second, remove Anode Cap. then slide the Main CBA backward.

4. Removal of the CRT. Fir st, disconnec t CN691 on the Main CBA. Second, remove screws 4(S-3) then slide the CRT backward.

4-1 L6550DC

S-1

ANT.IN

S-4

S-2

S-1

[1] Rear Cabinet

S-1

Fig. 1

S-1

S-2

S-1

S-4

S-3

[3] Main CBA

S-3

Anode Cap

Fig. 3

[2] CRT CBA

S-3

S-1

[1] Rear Cabinet

S-1

Fig. 2

S-1

[4] CRT

4-2 L6550DC

S-3

Fig. 4

TV Cable Wiring Diagram

DG691 DEGAUSSING COIL

SP802

CN691

SP801

CLN802

CLN801

MAIN CBA

CN801

CN802

WH301A

AC601 AC CORD

FLYBACK TRANSFORMER

T571

CN571

FOCUS

SCREEN

ANODE

TU1 TUNER

WH501A

JK1501

WH301B

WH501B

CN1501

TO CRT GROUND

Fig. 5

4-3 L6550DC

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. N0138UD or N0139UD 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. N0138UD or N0139UD) Remove 3 S crews from the back lid. (Fig. 1-1)

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

SCREWS

REMOTE CONTROL UNIT

Fig. 1-1

1. DC 120V Adjustment

Purpose: To obtain correct oper ation. 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 Meter to TP601 an d TP3 00 (GND) .

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. Pre ss " 6 " button on the Service r emote 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. Pre ss " 6 " button on the Service r emote 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

Notes:

1. The service remote control unit that be made in above method is usable in the electrical adjustment of the following models. SRT2313/2319, SRT2213B/2219B, SRT2227X, SRT2223X, SRT2223B, SRT2232X, SRT2220P SRT4127P

2. The attached remo te control unit can not be used as service remote control unit.

Fig. 1-2

5-1 L6550EA

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 con-

trol 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 con-

trol 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 con-

trol unit. Then select FRENCH display.

2. Press " CH o / p " buttons on the Service remote

control unit. Then choose FRENCH=OFF.

TINT (TNT)

1. Press " MENU " but ton on the S ervi ce remo te co ntrol 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 co ntrol 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 " but ton on the S ervi ce remo te co ntrol 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 ON 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 " ME NU " bu tton on the Servic 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.

4. Black Level Adjustment

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

rect, Proper brig htn ess c an not be obta ined b y adj us ting the Brightness Control.

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

2. Press " MENU " but ton on the S ervi ce remo te co ntrol unit and select " BRT "mode. (Display changes " BRT ", " CNT ", " CLR ", " TNT ", " V-TIN T ", and " SHRAP " 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.)

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.

5-2 L6550EA

5. V. Size Adjustment

Purpose: T o 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 Pa ttern.

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 inco r-

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 position of im age 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 remot e control unit 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 Pa ttern.

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 VR56 2 so that the monoscope pat tern will be 90±5% of display size and circle is round.

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

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