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Symphonic
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ST413E
Schematic
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Symphonic ST413E Schematic

SERVICE MANUAL
13” COLOR TELEVISION
ST413E
19” COLOR TELEVISION
ST419E
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
Cabinet Disassembly Instructions......................... 4-1
Electrical Adjustment Instructions......................... 5-1
Block Diagram....................................................... 6-1
Schematic Diagrams / CBA’s and Test Points...... 7-1
Schematic Diagrams............................................. 7-3
CBA Views and Test Points................................... 7-9
Wave Forms.......................................................... 8-1
Wiring Diagram...................................................... 9-1
IC Pin Functions .................................................. 10-1
Cabinet Exploded Views...................................... 11-1
Packing Exploded Views ..................................... 11-5
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
MHz MHz
dBµv dBµv dBµv
45.75
41.25 15
15 15
-
-
30 30 40
3. AFT Pull In Range (10mV input)
- MHz ±2.0 ±0.7
<DEFLECTION>
[ ST413E ]
Description Condition Unit Nominal Limit
1. Deflection Freq. Horizontal
Vertical
2. Linearity Horizontal
Vertical
3. Over Scan - % 10 -
4. High Vol tage - KV 23 -
[ ST419E ]
Description Condition Unit Nominal Limit
1. Deflection Freq. Horizontal
Vertical
2. Linearity Horizontal
Vertical
3. Over Scan - % 10 -
KHz
Hz
% %
KHz
Hz
% %
15.734 60
-
-
15.734 60
-
-
-
-
±15 ±10
-
-
±15 ±10
4. High Vol tage - KV 26 -
1-1 L2200SP
<VIDEO & CHROMA>
[ ST413E ]
Description Condition Unit Nominal Limit
1. Misconvergence Center Side
Corner
2. Brightness APL 100% Ft-L 60 40
3. Color Temperature - °K 9200°K -
4. Resolution Horizontal
Vertical
mm mm mm
Line Line
-
-
-
250 300
[ ST419E ]
Description Condition Unit Nominal Limit
1. Misconvergence Center Side
Corner
2. Brightness APL 100% Ft-L 40 25
3. Color Temperature - °K 9200°K -
4. Resolution Horizontal
Vertical
mm mm mm
Line Line
-
-
-
250 300
<AUDIO> All items are measured across 8Ω load at speaker output terminal.
Description Condition Unit Nominal Limit
0.3
1.2
1.5
-
-
0.4
1.5
2.1
-
-
1. Audio Output Power 10% THD W 1 0.8
2. Audio Distortion (w/LPF) 500mW % 2 7
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.
-
3dB Hz 100~11K -
1-2 L2200SP
IMPORTANT SAFETY PRECAUTIONS
Prior to shipment from the fact ory, our products are stri ctly insp ected for recogni zed pr oduct sa fety and elec trical 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 safety 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 rovid ed o n thi s 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 as ­sembly 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 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 - With the instrument AC
plug removed from any AC source, connect an electrical jumper acr oss the two AC plug prongs. Place the instrument AC switch 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 mego­hm, an abnormality exists that must be corrected before the instrument is r eturne d to the cu stomer . 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 thi s test.) Use a leak-
age current tester or a me tering syst em that com ­plies with American National Standards Institute (ANSI) C101.1 Leakage Current for Appliances and Underwriters Laborat ories (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 instrument (antennas, handle br ackets, metal cabi net, screw heads, metallic overlay s, control shafts, etc.), es ­pecially 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 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 NO T 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.
e. X-Radiation and High Voltage Limits - Because
the picture tube i s the prim ary potentia l source of X-radiatio n in solid- 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 vic -
CURRENT
TESTER
+
EARTH GROUND
_
2-1 L6115IMP
ing is performed that inv olves 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 do wn.") 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 cabi net, 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 safety ch arac­teristics 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 ; be­cause of potential hazard, do not try to remove such "permanently attached" yokes from the pic­ture tube.
5. Hot Chassis Warning -
a. Some TV receiver chassis are electrically connect-
ed directly to one conduc tor of th e AC powe r cor d 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 , for both pers onnel 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. Always insp ect in all ar eas for pinched, out of plac e, or frayed wiring. C heck AC power cord for damage.
7. Components, parts, and/or wiring that app ear 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 corre ct i ve ac ti o n to 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 i mportant to imple ­ment 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, etc.)
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 fro m 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 returned to original posi­tions. Afterwards, perform the following tests and con­firm the spec ified values in or der to verify comp liance with safety standards.
1. Clearance Distance
When replacing primary circuit components, confirm specified clearance distance (d) and ( d') between sol ­dered 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 and 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.
Z
1.5kΩ
Chassis or Secondary Conductor
Primary Circuit Terminals
dd'
Exposed Accessible Part
AC Voltmeter
0.15µF
Earth Ground
B
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 and every fifth pin are in dic at -
ed as shown.
Pin 1
c. The 1st pin of every male connector is indicated as
shown.
Pin 1
Input
In
Bottom View
5
10
(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. (F ig. 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 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 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
or
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 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 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 th e 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 caused 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 es cape through the body grounding ba nd, be careful to avoid contacting semiconductors with your clothing.
<Incorrect>
CBA
Presolder
Flat Pack-IC
Fig. S-1-8
<Correct>
1MΩ
CBA
Grounding Band
1MΩ
CBA
Conductive Sheet or Copper Plate
3-3 L6115STA
CABINET DISASSEMBLY INSTRUCTIONS
[ ST413E ]
1. Disassembly Flowchart
This flowchart indicates the disassembly steps for the cabinet par ts, and the CBA in orde r to gain acces s to item(s) to be se r vic ed. W hen r eass 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
Note :
(1) Order of steps in procedu re. When reas sembli ng,
follow the steps i n reverse or der. These n umbers 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 4(S-1), 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 !
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-2), Anode Cap 4
Part
Rear Cabinet
Fig.
No
1,2 4(S-1) 1
↓↓↓↓↓
(1) (2) (3) (4) (5)
Remove/*unlock/
release/unplug/
unclamp/desolder
Note
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- 2) and Anode Cap. then slide the CRT backward.
4-1 L2200DC
S-1
S-1
[1] Rear Cabinet
Front Cabinet
[3] Main CBA
Control Plate
[1] Rear Cabinet
Front Cabinet
S-1
S-1
Fig. 1
S-1
S-1
Front Cabinet
CRT Ground Wire
S-2
Anode Cap.
S-2
[4] CRT
Fig. 3
Degaussing Coil
[2] CRT
S-2
CBA
S-2
Control Plate
Control Plate
Fig. 4
Fig. 2
4-2 L2200DC
TV Cable Wiring Diagram
L691 DEGAUSSING COIL
MAIN CBA
SP801
CLN801
CN801
AC601 AC CORD
CN691
FLYBACK TRANSFORMER
T571
CN571
FOCUS
SCREEN
WH301A
TU1 TUNER
WH501A
JK501
WH301B
ANODE
WH501B
CN501
TO CRT GROUND
Fig. 5
4-3 L2200DC
[ ST419E ]
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 r eass 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
Note :
(1) Order of steps in procedu re. When reas sembli ng,
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."
[2] CRT CBA
[3] Main CBA
[4] CRT
2. Disassembly Method
Removal
Step/
Loc. No.
[1]
[2] CRT CBA
[3] Main CBA
[4] CRT 4B 4(S-2B), Anode Cap 4
Part
Rear Cabinet
Fig.
No
1B, 2B
4B, 5B
3B, 5B
Remove/*unlock/
release/unplug/
unclamp/desolder
5(S-1B), (S-3B) 1
CN501 2
CN571 3
Note
Reference Notes in the Table
1. Removal of the Rear Cabinet. Remove screws 5(S-1B) and (S-3B) 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 CRT. Remove screws 4(S-2B) and Anode Cap. then slide the CRT backward.
↓↓↓↓↓
(1) (2) (3) (4) (5)
4-4 L2300DC
S-3B
S-1B
[1] Rear Cabinet
S-1B
Front Cabinet
[3] Main CBA
Control Plate
Front Cabinet
Control Plate
[1] Rear Cabinet
S-1B
S-1B
Fig. 1B
S-1B
S-3B
S-1B
S-1B
Degauss Holder
CRT Ground Wire
Front Cabinet
Control Plate
S-2B
Anode Cap.
S-2B
[4] CRT
Fig. 3B
Degaussing Coil
[2] CRT CBA
S-2B
S-2B
Degauss Holder
Fig. 2B
Fig. 4B
4-5 L2300DC
TV Cable Wiring Diagram
L691 DEGAUSSING COIL
MAIN CBA
SP801
CLN801
CN801
AC601 AC CORD
CN691
FLYBACK TRANSFORMER
T571
CN571
FOCUS
SCREEN
WH301A
TU1 TUNER
WH501A
JK501
WH301B
ANODE
WH501B
CN501
TO CRT GROUND
4-6 L2300DC
Fig. 5B
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note: "CBA" is abbreviation for "Circuit Board Assem­bly."
NOTE:
Electrical adjustm ent s ar e required 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. N0 121UD or N0134UD
6. DC power supply 13.2V/5A
7. Color Analyzer
How to set up the service mode:
Service mode:
1. Use the service remote control unit.
2. Turn the power on. (Use mai n power on the TV un it.)
3. Press "SLEEP" button on the service remote con­trol unit. Version of m icro co mpu ter wi ll dis pl ay on the CRT. (Ex: 058-0.06)
4. When CPU version is 058-0.06: Check the display on the lower left is "0200," set it at "0 200" ac cord­ing to "3-1. Setting for Data Values."
1. DC 105V Adjustment [ ST413E ]
Purpose: To obtain correct operation. Symptom of Misadjustment: The picture is dark and
the unit does not operate correctly.
Test Point Adj. Point
TP601
TP300 (GND)
M. EQ. Spec.
DC Voltmeter,
Plastic Tip Driver
VR661
+105±0.5V DC
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. Add J1 (Jumper Wi re) to the rem ote control CB A. (Fig. 1-2)
SCREW
REMOTE CONTROL UNIT
J 1
REMOTE CONTROL CBA
Fig. 1-1
Fig. 1-2
Note:TP601, TP300 (GND), VR661 --- Main CBA
1. Connect D C 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 +105±0.5V DC.
1. DC 114V Adjustment [ ST419E ]
Purpose: To obtain correct operation. Symptom of Misadjustment: The picture is dark and
the unit does not operate correctly.
Test Point Adj. Point
TP601
TP300 (GND)
M. EQ. Spec.
DC Voltmeter,
Plastic Tip Driver
Note:TP601, TP300 (GND), VR661 --- Main CBA
1. Connect D C 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 +114±0.5V DC.
VR661
+114±0.5V DC
5-1 L2200EA
2. Black Stretch 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. Press "6" button on the service remote control unit. "B-S" is indicated.
3. Press "CH o / p" bu ttons on the service remote con ­trol unit so that displa y will change "OFF," "0, " "1," "2" and "3." Then choose "B-S OFF."
4. Press "6" button on the service remote control unit. "B-S*2" is indicat ed.
5. Press "CH o / p" buttons on the service remote control unit so that display will change "0" and "1." Then choose "B-S*2 0."
6. Turn the power off and on again, using the mai n power button on the TV unit.
3-1. Setting for Data Values
General
1. Enter the Service mode. (See page 5-1)
2. To select the data value, press "VOL p" bu tton o n the service remote control unit.
3. To set the following each data value, press "CH o / p" buttons on the service remote control unit.
7F --- set to 7F LANGUAGE --- set to SPA/FRA ACCESS CODE --- set to OFF SOUND TYPE --- set to MONO VIDEO TONE --- set to OFF FM-MODE --- set to OFF V-OUT --- set to OFF VIDEO --- set to V1 AV-MEMO --- set to OFF STABLE SOUND --- set to OFF FILTER --- set to OFF PROTECTOR --- set to 1000 YUVMEMORY --- set to OFF
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 pressed.
CONTRAST (CNT)
1. Press "MENU" button on the service remote control unit. Then select "CONTRAST" (CNT) displ ay.
2. Press "CH o / p" buttons on the service remote control unit so that the value of "CONTRAST" (CNT) becomes 84.
COLOR (CLR)
1. P ress "MENU" b utton on the service remote con­trol unit. Then select "COLOR" (CLR) display.
2. Press "CH o / p" buttons on the service remote control unit so that the val ue of "COLOR" (CLR) becomes 58.
TINT (TNT)
1. P ress "MENU" b utton on the service remote con­trol unit. Then select "TINT" (TNT) display.
2. Press "CH o / p" buttons on the service remote control unit so that the value of "T INT" (TNT) be­comes 57.
V-TINT (V-TNT)
1. P ress "MENU" b utton on the service remote 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 60.
SHARP (SHARP)
1. P ress "MENU" b utton on the service remote 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 40.
Note: BRIGHT data value does not need to be adjust-
ed at this moment.
NO SIGNAL BRT --- set to 0 A-MUTE POL --- set to L V-MENU --- set to OFF
3-3. H Adjustment
Purpose: To get correct horizontal position and size of
screen image. Symptom of Misadjustment: Horizontal position and
size of screen image may not be properly displayed.
1. Enter the Service mode. (See page 5-1)
2. Press "2" button on the service remote control unit and select H-Adj Mode.
5-2 L2200EA
3. Press "CH o / p" buttons on the service remote control unit so that the dis play will change "0" to "7." Then choose "4."
4. Turn the power off and on again, using the mai n power button on the TV unit.
4. Black Level Adjustment
Purpose: Set Black Level Symptom of Misadjustment: If Black level i s incor-
rect, proper br ightne ss c an no t be ob tained by adjust ­ing the Brightness Control.
1. Enter the Service mode. (See page 5-1.)
2. Press "MENU" button on the service remote con­trol unit and select "BRT" mode. (Display changes "BRT," "CNT," "CLR," "TNT," "V-TINT" and "SHARP" cyclically when "MENU" button is pressed.)
3. Press "CH o / p" buttons on the service remote control unit so that the value of "BRT" becomes
128.
4. Turn the power off and on again, using the mai n power button on the TV unit.
5. V. Size Adjustment
Purpose: To obtain correct vertical height of screen
image. Symptom of Misadjustment: If V.Size is incorrect,
vertical height of image on the screen may not be properly displayed.
Adj. Point Input
CH o / p buttons Monoscope
M. EQ. Spec.
Pattern Generator 90±5%
Note: Use service remote control unit.
1. Operate the unit for at least 20 minutes.
2. Enter the Service mode. (See page 1-5-1.) Press "9" button on the remote control unit and se­lect V-S mode. (Press "9" button then display will change to V-P and V-S.)
3. Input monoscope pattern.
4. Press "CH o / p" buttons on the service remote control unit so that the monoscope pattern is 90±5% of display size and the circle is round.
5. Turn the power off and on again, using the mai n power button on the TV unit.
6. V. Position Adjustment
Purpose: To obtain correct vertical p osition of sc reen
image. Symptom of misadjustment: If V. Position is incor-
rect, vertical height of image on the screen may not be properly displayed.
Adj. Point Mode Input
Screen Control,
CH o / p buttons
M. EQ. Spec.
Pattern Generator 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-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 are equal to each other.
6. Turn the power off and on again, us ing the main power button on the TV unit.
RF Monoscope
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.
Adj. Point Mode Input
CH o / p buttons,
[ H-P ] Mode
M. EQ. Spec.
Pattern Generator 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 unit and se­lect "H-P" mode.
5. Press "CH o / p" buttons on the service remote control unit so that the monoscope pattern is 90±5% of display size and the circle is round.
6. Turn the power off and on again, using the main power button on the TV unit.
RF Monoscope
5-3 L2200EA
8. Cut-off Adjustment
Purpose: To ad just the beam curre nt of R, G, B, and
screen voltage. Symptom of Misadjustment: White color may be
reddish, greenish or bluish.
9. White Balance Adjustment
Purpose: To mix red, green and blue beams cor rectly
for pure white. Symptom of Misadjustment: White becomes bluish
or reddish.
Adj. Point Mode Input
Screen Control,
CH o / p buttons
M. EQ. Spec.
Pattern Generator See Reference Notes below.
PATTERN GENERATOR
EXT. INPUT
Note: Screen Control FBT --- Main CBA
FBT= Fly Back Transformer Use service remote control unit
1. Degauss the CRT and allow CRT to operate for 20 minutes before starting the alignment.
2. Input the Black Raster Signal from RF Input.
3. Enter the Service mode. (See page 5-1)
4. Press "VOL p" button on the service remote control unit and select "C/D" mode. (Disp lay will change "C/D," "7F," "LANGUAGE," "ACCESS CODE," "SOUND TYPE," "VIDEO TONE," "FM-MODE," "V­OUT," "VIDEO," "AV-MEMO," "STABLE," "FIL­TER," "YUVMEMORY" and "A-M UTE POL" cycli­cally when "VOL p" button is pressed.) Then press "1." The displa y will momentari ly show "CUT OFF R" (R=Red.) Now the re shoul d be a h orizont al line across the center of the picture tube. If needed, gradually turn the screen control on the flyback clockwise until the horizontal line appears. Adjust the Red Cut off by pressing the "CH o / p" buttons. Proceed to Step 5 when the Red Cut off adjustment is done.
5. Press the "2" button. The display will momentarily show "CUT OFF G" (G=Green.) Adjust the Green Cut off by pressing the "CH o / p" buttons. Proceed to step 6 when the Green Cut of f adjustment is done.
6. Press the "3" but ton. The disp la y will mom ent arily show "CUT OFF B" (B=Blue.) Adjust the Blue Cut off by pressing the "CH o / p" buttons. When done with steps 4, 5 and 6, the horizontal line should be pure white. If no t, then attempt the Cut off adjustment again.
RF Black Raster
Figure
Fig 2
Test Point Adj. Point Mode Input
Screen
Pattern Generator,
Color analyzer
Note: Use service remote control unit
1. Operate the unit more than 20 minutes.
2. Face the unit to the East. Degauss the CRT using degaussing coil.
3. Input the White Raster (APL 100%).
4. Set the color analyzer to the CHROMA mode and after zero point calibration, bring the optical recep­tor to the center on the tube surface (CRT).
5. Enter the Service mode. Press "VOL p" button on the service remote control unit and select "C/D" mode. (Display changes "C/D," "7F," "LAN­GUAGE," "ACCESS CODE," "SOUND TYPE," "VIDEO TONE," "FM-MODE," "V-OUT," "VIDEO," "AV-MEMO," "STABLE," "FILTER," "YUVMEMO­RY" and "A-MUTE POL" cyclically when "V OL p" button is pressed.) Then pre ss "8" button on the Service remote control Unit.
6. Press "4 " butto n on the se rvice rem ote con trol unit for Red adjustment. Press "5" button on the service remote control unit for Blue adjustment.
7. In each color mode, press "CH o / p" b utton to ad­just the values of color.
8. Adjusting Red an d Bl u e co l or so t h at the t em pera­ture becomes 9200K (x: 286 / y: 294) ±3%.
9. A t this time, r e-check that horizontal l ine is white. (Refer to "Cut-off Adjustment".) If not, re-adjust Cut-off Adjustment until the horizontal line be­comes pure white.
10.Turn the power of f and on again to return to normal mode. Receive APL 100% white sig nal and confirm that chroma temperatures become 9200K (x: 286 / y:
294) ±3%.
Note: Confirm that Cut Off Adj. is correct after this adjustment, and attempt Cut Off Adj. if needed.
CH o / p
buttons
M. EQ. Spec.
RF
Figure
Color Analyzer
White Raster
(APL 100%)
See below
Fig. 3
5-4 L2200EA
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