Text preview for : Panasonic PT-43LC14, PT-50LC14, PT-60LC14 (Service Manual).pdf part of Panasonic PT-43LC14, PT-50LC14, PT-60LC14 Panasonic PT-43LC14, PT-50LC14, PT-60LC14 (Service Manual)
Back to : Panasonic PT-43LC14, PT-5 | Home
ORDER NO. MKE0406850C1 B2
Multi Media Display
PT-43LC14 PT-50LC14 PT-60LC14
© 2004 Matsushita Kotobuki Electronics Industries LTD. All rights reserved. Unauthorized copying and distribution is a violation of law.
PT-43LC14 / PT-50LC14 / PT-60LC14
CONTENTS
Page
1 SAFETY PRECAUSIONS 1.1. GENERAL GUIDELINES 1.2. LEAKAGE CURRENT COLD CHECK 1.3. LEAKAGE CURRENT HOT CHECK 1.4. UV-PRECAUTION 2 PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES 3 ABOUT LEAD FREE SOLDER (PbF) 4 SERVICE NOTES 5 DISASSEMBLY / ASSEMBLY PROCEDURES 5.1. CABINET SECTION 6 ADJUSTMENT PROCEDURES 1 7 ADJUSTMENT PROCEDURES 2 8 TROUBLESHOOTING HINTS FOR BLOCK LEVEL REPAIR 9 BLOCK DIAGRAMS 10 SCHEMATIC DIAGRAMS NOTES 10.2. INTERCONNECTION SCHEMATIC DIAGRAM 10.3. FRONT JACK SCHEMATIC DIAGRAM 10.4. NETWORK / OPERATION / DIAGRAMS 10.5. AUDIO AMP SCHEMATIC DIAGRAM 10.6. TUNER SCHEMATIC DIAGRAM THERMISTOR 1 / THERMISTOR 2 / 13.4. ELECTRICAL REPLACEMENT PARTS LIST 70 71 72 COVER SWITCH SCHEMATIC 4 5 6 18 18 45 48 51 57 67 67 68 69 3 3 3 3 3 10.7. VOLTAGE CHART 11 CIRCUIT BOARD LAYOUT 11.1. FRONT JACK C.B.A. / NETWORK C.B.A. 11.2. AUDIO AMP C.B.A. / 11.3. TUNER C.B.A. 12 EXPLODED VIEWS 12.1. MAIN PARTS SECTION 12.2. FRONT AND BASE SECTION 12.3. DISPLAY SECTION 12.4. SCREEN SECTION 12.5. PROJECTION SECTION 12.6. TV AND TUNER SECTION 12.7. PACKING PARTS AND ACCESSORIES SECTION 12.8. OPTIONAL ACCESSORY SECTION 13 REPLACEMENT PARTS LIST 13.1. REPLACEMENT NOTES 13.2. MECHANICAL REPLACEMENT PARTS LIST THERMISTOR 1 C.B.A. / COVER SWITCH C.B.A. 76 77 79 79 80 81 83 85 86 87 88 90 90 91 92 93 96 14 SCHEMATIC DIAGRAMS FOR PRINTING WITH LETTER SIZE THERMISTOR 2 C.B.A. / OPERATION C.B.A. / 75
Page
73 75
10.1. SCHEMATIC DIAGRAM AND CIRCUIT BOARD LAYOUT
13.3. OPTIONAL ACCESSORY REPLACEMENT PARTS LIST
2
PT-43LC14 / PT-50LC14 / PT-60LC14
1 SAFETY PRECAUSIONS
1.1. GENERAL GUIDELINES
1. For continued safety, no modification of any circuit should be attempted. 2. Disconnect AC Plug before disassembling this unit. 3. It is advisable to use an isolation transformer in the AC supply before servicing. 4. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 5. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers, shield, and isolation R-C combinations etc. are properly installed. 6. After servicing, be sure to restore the wires, leads, insulation barriers, shields, etc. 7. After servicing, make the leakage current checks to prevent the customer from being exposed to shock hazards. Caution: Use a separate Isolation Transformer for this unit when servicing.
not exceed 1/2 mA. In case a measurement is outside of the limits specified, there is a possibility of shock hazard, and thereceivershouldbe repaired and rechecked before it is returned to the customer.
Figure 1
1.4.
UV-PRECAUTION
1. Be sure to disconnect the AC Plug when replacing the lamp. 2. Since the lamp reaches a very high temperature during its operation, wait until it has completely cooled off when replacing the Lamp Unit. 3. The lamp emits small amounts of UV-Radiation. Avoid direct-eye contact by covering the Lamp and wearing the UV cut protective glass. 4. The high pressure lamp involves a risk of explosion.
1.2.
LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two prongs on the plug. 2. For physically operated power switches, turn power on. Otherwise skip step 2. 3. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the receiver, such as screwheads, connectors, etc. When the exposed metallic part has a return path to the chassis, the readingshouldbebetween 1 M and 12 M. When the exposed metal does not have a return path to the chassis, the reading must be infinity.
1.3.
LEAKAGE CURRENT HOT CHECK
Figure 2
1. Plug the AC cord directly into the AC outlet. Do not use a isolation transformer for this check. 2. Connect a 1.5 k, 10 W resistor, in parallel with a 0.15 µF capacitor, between each exposed metallic part on the set and a good earth ground, as shown in Figure 1. 3. Use an AC voltmeter, with 1 k/V or more sensitivity, to measure the potential across the resistor. 4. Check each exposed metallic part, and measure the voltage at each point. 5. Reverse the AC plug in the AC outlet and repeat each of the above measurements. 6. The potential at any point should not exceed 0.75 V RMS. A leakage current tester (Simpson Model 229 equivalent) may be used to make the hot checks. Leakage current must 3
PT-43LC14 / PT-50LC14 / PT-60LC14
2 PREVENTION OF ELECTROSTATIC DISCHARGE (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistorsandsemiconductor"chip" components. The following techniques should be used to help reduce the incidence of component damage caused by electro static discharge (ESD). 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,whichshouldbe removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an antistatic solder removal device. Some solder removal devices not classified as "antistatic (ESD protected)" can generate electrical charge sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparableconductivematerial). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. CAUTION : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)sufficienttodamage an ES device).
4
PT-43LC14 / PT-50LC14 / PT-60LC14
3 ABOUT LEAD FREE SOLDER (PbF)
5
PT-43LC14 / PT-50LC14 / PT-60LC14
4 SERVICE NOTES
LED INDICATIONS FOR ERROR CONDITION
Each LED indication facilitates finding the cause of the error. When an error is detected, the Lamp comes off and the LED on the front will flash.
POWER LED
TV/VIDEO
TEMP LED
LAMP LED
(Note 2) Error No.
1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17)
(Note 3) LAMP OFF
Error Information
Fan1, Fan2 or Fan3 stopped Lamp Cover open Temperature Sensor shorted or open (Thermistor 1 C.B.A.) Abnormal Temperature (Thermistor 1 C.B.A.) Ballast Error (abnormal Lamp or Ballast)
POWER LED
flashes orange once every 5 seconds flashes orange twice every 5 seconds -
TEMP LED
flashes once every 5 seconds flashes twice every 5 seconds -
LAMP LED
-
OSD
flashes once every 5 seconds flashes twice every 5 seconds flashes 3 times every 5 seconds flashes 4 times every 5 seconds flashes once every 5 seconds flashes twice every 5 seconds flashes 3 times every 5 seconds flashes 4 times every 5 seconds flashes 5 times every 5 seconds flashes 6 times every 5 seconds -
Ballast Error (abnormal Lamp voltage) Ballast Error (abnormal temperature) Ballast Error (other causes) Abnormal Voltage on 30 V line Abnormal Voltage on 9 V line Abnormal Voltage on 5 V line Abnormal Voltage on 3.3 V line Abnormal Voltage on -5 V line Abnormal Voltage on 6 V line Temperature Sensor shorted or open (Thermistor 2 C.B.A.) Abnormal Temperature (Thermistor 2 C.B.A.) Clogged air filter
flashes orange 5 times every 5 seconds flashes orange 6 times every 5 seconds flashes orange 7 times every 5 seconds flashes orange 8 times every 5 seconds flashes orange 9 times every 5 seconds flashes orange 10 times every 5 seconds -
flashes once every 5 seconds flashes twice every 5 seconds flashes 3 times every 5 seconds flashes 4 times every 5 seconds flashes 5 times every 5 seconds flashes 6 times every 5 seconds flashes 3 times every 5 seconds flashes 4 times every 5 seconds flashes 5 times every 5 seconds
Note: 1. When two or more errors have occurred at the same time, the LED will alternate flash patterns as shown above every 5 seconds. 2. Warning OSD appears when the air filter is clogged. 3. LAMP OFF: The LED will flash immediately after the Lamp comes off.
6
PT-43LC14 / PT-50LC14 / PT-60LC14
MAIN PARTS LOCATION
Network C.B.A.
Lamp Cover Cover Switch C.B.A.
TEMP LED LAMP LED Network C.B.A.
Optical Cover Front Cover Unit Operation C.B.A. POWER LED
Projection Unit Thermal Fuse Unit Thermistor 1 C.B.A. Air Filter Fan Case Unit (Fan 1) Thermistor 2 C.B.A. Fan 3
Front Jack C.B.A. Main C.B.A.
Ballast C.B.A. Tuner C.B.A.
Air Filter Air Filter
Fan 2 LCD Drive C.B.A.
Audio Amp C.B.A.
Fan 4
Rear Cover Power C.B.A. Rear Jack C.B.A. TV/Tuner Unit
7
PT-43LC14 / PT-50LC14 / PT-60LC14
SERVICE MODE
In this mode, the following information can be confirmed on the screen: Service Mode (1/3) · Current Lamp elapsed time · The number of Lamp ON (For reference only) · BKSV number read-out Service Mode (2/3) · Key detection check · Communication check for IIC bus and serial bus on the Main C.B.A. · Total Lamp elapsed time · Communication check for IIC bus on the Main C.B.A. · EEPROM IC6006 version and build version (For reference only) · EEPROM IC6306 version and build version (For reference only) · IC6003 software version and build version (For reference only) · IC6302 software version and build version (For reference only) Service Mode (3/3) · IC6003 Port information · IC6302 Port information Note: IC6003: Main Microcontroller on the Main C.B.A. IC6302: Sub Microcontroller on the Main C.B.A.
Service Mode Map
Enter : VOLUME DOWN button + TV/VIDEO key
(on the front) (on the remote)
(for more than 5 seconds in power off condition) Power ON
SERVICE LAMP CUR OSD LON BKSV MODE TIME 2000 O 15 CA F h N 3 B 1/3
OPERATION RENT LAMP: DISPLAY : COUNT : : 4B 7E 3D
< Service Mode (1/3) >
CH DOWN key
SERVICE IC3 5 6 TO IC7 5 0 0 T 5 0 0 0 A 0 1 4 5 L 1 MODE :1 :1 :1 :1 IR 3502 5103 6006 MTNR E F V V : : : : : : : : : 1 1 1 1 1 1 0 0 0 0 4 0 4 4 U 3 5 9 2 S 0 0 0 0 N 5 3 0 3 T 5 0 5 5
CH UP key
2 : : : : h : 0 2 0 /3 1 1 1 1 1
IC6003 IC6302
I 0 0 0 4 N 2 0 2 2
T 4 1 4 5 R 5 0 5 0
< Service Mode (2/3) >
CH DOWN key
SE I P0 P1 P2 I P0 P1 P2 P3 P4 R C : : : C : : : : : V 6 0 1 1 6 0 0 1 I 0 0 0 1 3 0 0 0 1 C 0 0 0 1 0 1 0 1 E 3 0 0 1 2 0 0 0 1 MODE PORT 1110 0001 1111 PORT 1111 -1-1 0111 0111 0011 P P P P P P P P P P P 6 3 4 5 7 8 5 6 7 8 A : : : : : : : : : : : 0 0 1 1 1 1 1 1 0 0 0 0 0 1 1 1 0 0 0 1 0 1 0 0 -
CH UP key
0 0 0 1 1 0 1 0 0 0 0 1 0 1 1 1 0 1 0 0 0 0 0 1 0 0 1 1 1 1 0 1 0 0 1 0 0 0 1 1 1 0 0 0 0 1 1 1 0 1 1 3/3
< Service Mode (3/3) >
CH DOWN key Exit: Power OFF. (When turning the power on again after once turning off, wait for approx. 10 seconds. Or, the unit can not be released from Service Mode.) Fig. 1-1
8
PT-43LC14 / PT-50LC14 / PT-60LC14
BEFORE REMOVING THE MAIN C.B.A. OR THE TV/TUNER UNIT FROM THE UNIT AT THE USER'S LOCATION
Note: The TV/Tuner Unit includes the Main C.B.A. CAUTION: 1. Be sure to make a note of the CURRENT LAMP value (value A) in Service Mode (1/3):
SERVICE LAMP CUR OSD LON BKSV MODE TIME 2000 O 15 CA F h N 3 B 1/3
WHEN REINSTALLING THE MAIN C.B.A. OR THE TV/TUNER UNIT INTO THE UNIT AT THE USER'S LOCATION
CAUTION: 1. Set CURRENT LAMP value to original value as follows. 1) Select CURRENT LAMP in Service Mode (1/3). 2) Press the VOLUME UP/DOWN key on the remote to change to the original value (value A) that was noted before removing the Main C.B.A. or the TV/Tuner Unit at the user's location.
SERVICE LAMP MODE TIME 2000 O 15 CD 6 h N 3 6 1/3
OPERATION RENT LAMP: DISPLAY : COUNT : : 4B 7E 3D
OPERATION RENT LAMP: DISPLAY : COUNT : : B0 3A 59
Value A (Changeable)
CUR OSD LON BKSV
Value A (Changeable)
Fig. 2 LAMP OPERATION TIME is stored in EEPROM on the Main C.B.A. Therefore, before removing the Main C.B.A. or the TV/Tuner Unit at the user's location, make a note of the CURRENT LAMP value (value A) in Service Mode (1/3). Then, after installing the new Main C.B.A. or the TV/Tuner Unit at the user's location, set the CURRENT LAMP value to the original value (value A) in Service Mode. Otherwise, OSD and LED Lamp replacement indications will be displayed at the wrong time. Note: In case it is impossible to make a note of the CURRENT LAMP value because of a defective Main C.B.A., ask the customer their daily average use and the approximate age of the current Lamp. Then, calculate the CURRENT LAMP value as follows and make a note.
Fig. 3
Service Mode Map
Enter : VOLUME DOWN button + TV/VIDEO key
(on the front) (on the remote)
(for more than 5 seconds in power off condition) Power ON
SERVICE LAMP CUR OSD LON BKSV MODE TIME 2000 O 15 CA F h N 3 B 1/3
OPERATION RENT LAMP: DISPLAY : COUNT : : 4B 7E 3D
< Service Mode (1/3) >
CH DOWN key
SERVICE IC3 5 6 TO IC7 5 0 0 T 5 0 0 0 A 0 1 4 5 L 1 MODE :1 :1 :1 :1 IR 3502 5103 6006 MTNR E F V V : : : : : : : : : 1 1 1 1 1 1 0 0 0 0 4 0 4 4 U 3 5 9 2 S 0 0 0 0 N 5 3 0 3 T 5 0 5 5
CH UP key
2 : : : : h : 0 2 0 /3 1 1 1 1 1
Daily average use X (hours)
Approx. age (days)
=
CURRENT LAMP (hours)
Note: The TOTAL value can be set to the original value in Service Mode (2/3) by similar method: Before removing the Main C.B.A. at the user's location, make a note of the TOTAL value in Service Mode (2/3). Then, after installing the new Main C.B.A. at the user's location, set the TOTAL value to the original value in Service Mode.
IC6003 IC6302
I 0 0 0 4 N 2 0 2 2
T 4 1 4 5 R 5 0 5 0
< Service Mode (2/3) >
CH DOWN key
SE I P0 P1 P2 I P0 P1 P2 P3 P4 R C : : : C : : : : : V 6 0 1 1 6 0 0 1 I 0 0 0 1 3 0 0 0 1 C 0 0 0 1 0 1 0 1 E 3 0 0 1 2 0 0 0 1 MODE PORT 1110 0001 1111 PORT 1111 -1-1 0111 0111 0011 P P P P P P P P P P P 6 3 4 5 7 8 5 6 7 8 A : : : : : : : : : : : 0 0 1 1 1 1 1 1 0 0 0 0 0 1 1 1 0 0 0 1 0 1 0 0 -
CH UP key
0 0 0 1 1 0 1 0 0 0 0 1 0 1 1 1 0 1 0 0 0 0 0 1 0 0 1 1 1 1 0 1 0 0 1 0 0 0 1 1 1 0 0 0 0 1 1 1 0 1 1 3/3
< Service Mode (3/3) >
CH DOWN key Exit: Power OFF. (When turning the power on again after once turning off, wait for approx. 10 seconds. Or, the unit can not be released from Service Mode.)
9
PT-43LC14 / PT-50LC14 / PT-60LC14
REPLACEMENT OF LAMP
Lamp Time Reset Procedure:
Be sure to reset the Lamp time to "0" after replacing the new Lamp. 1. Plug in the AC Cord, and turn on the power by pressing the POWER button. 2. Press and hold the VOLUME DOWN button on the unit and the SPLIT key on the remote together for over 5 seconds in power on condition. When the reset is finished, the display as shown in Fig. 51 appears and the LAMP LED goes out.
Lamp Replacement Procedure:
1. Press the POWER button on the remote to turn off the power. 2. Wait for about 1 minute until the cooling fan stops. Note: The lamp cooling fan will continue to operate for about 1 minute after the power is turned off. Do not unplug the AC Cord from the outlet until the fan has stopped. Avoid interrupting the power by using circuit breakers or switchable power strips. 3. After the cooling fan has stopped, unplug the AC Cord from the outlet. Note: Please wait more than one hour before replacing the lamp. [ Forced cooling function ] If you need to replace the lamp more urgently: · The Projection display has a forced cooling feature. After the POWER button is turned OFF, and sometime during about the first minute of the normal cooling fan operation, press the VOLUME UP button on the unit and CH UP key on the remote at the same time for more than 5 seconds. The cooling fan will operate for about 10 minutes. (LAMP LED will flash 5 times every 5 second and POWER LED will flash red for 10 minutes.) 4. Remove the Front Cover Unit from the latches. 5. Remove the Lamp Cover by loosening the Screw.
Fig. 5-1 Note: 1. The unit will detect when the Lamp's end of life is approaching and the following message will be displayed. And the LAMP indicator light will be lit when the Lamp's end of life is approaching.
Lamp Cover Screw
Fig. 5-2 2. Influences of frequent lighting, continuous light use for over 24 hours, the number of times lit, the length of time between lightings, etc. may shorten lamp life. (Because of this, we recommend having a replacement lamp on hand.) WARNING: · The high-pressure lamp could explode if not properly handled and lamp fragments could cause injury. · Because the temperature of the lamp unit is elevated immediately after its use, touching it may cause burns. Please allow the lamp to cool before handling or replacing the lamp unit. · Wear gloves and safety eyeglasses when replacing the lamp unit. · If replacement of the lamp unit becomes necessary during the operation of the TV, follow the procedure to turn off the power and wait until the lamp unit cools completely. Cautions for Lamp Unit Replacement: · Do not disassemble the Lamp. · The lamp may be hot. Be careful when handling. Wear gloves. · Under no circumstance should you touch the actual bulb. At this high operating temperature the natural oil on your finger can cause the glass to weaken where touched and the bulb can crack or explode.
10
Fig. 5-3 6. Loosen the Screw on the Lamp. Then, pull the Lamp. Note: Because the Lamp may still be hot, use caution when handling.
Lamp Screw
Fig. 5-4 7. Install the new Lamp, and tighten the Screw. 8. Install the Lamp Cover securely, and tighten the Screw. 9. Install the Front Cover Unit. Note: After replacing the Lamp, use caution to reset the Lamp time.
PT-43LC14 / PT-50LC14 / PT-60LC14
CLEANING METHOD
THE SCREEN UNIT AND THE MIRROR ·THE SCREEN UNIT (Lenticular Screen, Fresnel Lens) It is strongly recommended that the Lenticular Screen surface (outside) and the Fresnel Lens surface (inside) should be wiped gently with a clean, soft, dry cloth to remove the dirt. Note: 1. If the dirt cannot be removed by wiping with a clean, soft, dry cloth, use a clean, soft, dry cloth moistened with diluted neutral pH liquid cleanser or a lens cleaner (usually containing a small amount of ethyl alcohol) and wipe lightly. Take care not to leave any streaks. Do not use cleaning materials containing methyl alcohol, acetone, or dichloromethane. 2. Use an air blower to clean the inner surface of the Lenticular Screen and the outer surface of the Fresnel Lens (the surfaces that one another). These surfaces must not be wiped with a cloth. ·THE MIRROR Remove any dirt with an air blower or wipe with a clean, soft, dry cloth. If wiped too forcefully, the surface of the Mirror can be damaged. If wiping with a clean, dry cloth does not remove the dirt, the Mirror must be replaced.
Mirror
THE FILTER ON THE PROJECTION UNIT CAUTION: Operating with torn or damaged Air Filter may cause damage to the Projection unit. Remove the Projection Unit from rear. Then, clean the filters on the Projection Unit. Gently remove any accumulated dust from filter with a vacuum cleaner.
Air Filter Air Filter
Air Filter
Screen Unit
Fig. 6-3 THE PROJECTION LENS Use lens cleaning paper and cleaner available at your local camera shop, etc. Dampen the cleaning paper with cleaner and gently wipe the surface of the lens from the center outward to remove dust. Lens
Lenticular Screen surface (outside)
Fresnel Lens surface (inside)
Fig. 6-1 THE LAMP Gently wipe the surface of the glass of the Lamp with cleaning paper or soft cloth.
Surface of glass
Fig. 6-4 THE POLARIZER UNIT, THE FIELD LENS, THE RELAY LENS, THE CONDENSER LENS, THE DICHROIC MIRROR, THE FULL MIRRORS, THE INTEGRATOR AND THE P/S CONVERTER Make sure that no dust gets on the optical components such as the Polarizer Unit, the Field Lens, the Relay Lens, the Condenser Lens, the Dichroic Mirror, the Full Mirrors, the Integrator and the P/S Converter. Clean these optical components with cleaning paper moistened with pure ethyl alcohol or a lens cleaner which contains no water or oil. THE LCD PANEL OF THE LCD/PRISM UNIT 1) Clean the surface of the LCD Panel of the LCD/Prism Unit with an air blower or wipe with a clean, or soft blush lightly. 2) If any dirt remains, lightly wipe the surface with a cotton swab moistened with pure ethyl alcohol or a lens cleaner which contains no water or oil. Use a new swab after each wiping so that dirt will not be re-deposited on the surface.
11
Fig. 6-2
PT-43LC14 / PT-50LC14 / PT-60LC14
TO DISTINGUISH THE PROJECTION LENS UNIT OR THE PROJECTION UNIT
The only difference between the 43 inch model and the 50 inch model of the Projection Unit is the Projection Lens. To distinguish, see marking (Z or A) on the Projection Lens. And the 60 inch model of the Projection Unit is placed label on the Projection Lens.
43/50 inch model as shown
RESET USER'S MEMORY FUNCTIONS
Be sure to reset the user's memory: · After replacing the Main C.B.A. (included in the TV/Tuner Unit) · If the secret code of V-chip is forgotten. · When moving the unit to a new location. 1. Turn on the power. 2. Press the MENU key on the remote to display the MENU screen. 3. Select LOCK by pressing CH UP/DOWN key on the remote. Then, press the OK key.
X X X A
Z or A
4. Press and hold the VOLUME DOWN button on the unit and the OK key on the remote for more than 5 seconds while this LOCK menu is displayed. When reset is finished, power shuts off automatically (the user's memory is reset).
Z with red: for 43 inch model A with black: for 50 inch model 60 inch model as shown
CLOGGED AIR FILTER DETECTION
When a dirty or clogged air filter is detected, the OSD display appears for 1 minute. And then the Lamp is turned OFF. When this OSD display appears, remove the Projection Unit from rear, and clean the air filters gently on the Projection Unit.
AIR FILTER CLEANING IS RECOMMANDED AT THIS TIME. FIRST TURN THE UNIT OFF. PLEASE CALL FOR SERVICE. UNIT WILL BE TURNED OFF AFTER 1 MINUTE.
LSDL0248
LSDL0248 with Yellowish green label: for 60 inch model
Note: LSDL0248 is not the part numbers of the Projection Lens as a replacement part.
12
PT-43LC14 / PT-50LC14 / PT-60LC14
BEFORE REMOVING THE PROJECTION UNIT FROM THE UNIT AT THE USER'S LOCATION
1. When removing the Projection Unit, remove the Lamp from the Projection Unit and keep it. Then, reinstall this Lamp into the new Projection Unit. 2. When removing the Projection Unit, remove the Fan 3 Unit, the Top Duct 3 Unit and the 20-pin Cable from the Projection Unit and keep them. Then, reinstall the Fan 3 Unit, the Top Duct 3 Unit and the 20-pin Cable into the new Projection Unit.
21 Projection Unit
DO NOT UNPLUG AC CORD DURING COOLING OPERATION
The lamp cooling fan will continue to operate for approximately 1 minute after the power is turned off. At the same time, the POWER LED will flash red. Do not disconnect the AC Cord from the power outlet and do not open any circuit breakers while the cooling fan is still operating.
HOT CIRCUIT
Primary circuit exists on the Audio Amp C.B.A., the Ballast C.B.A. and the Power C.B.A. This circuit is identified as "HOT" on the C.B.A. and in the Service Manual. Use extreme care to prevent accidental shock when servicing.
Screw for lamp
Lamp
Clamper
Fan 3 Unit
MODEL NO. IDENTIFICATION MARK
Use Marks shown in the chart below to distinguish the different models included in this Service Manual.
P2904
402
MODEL
GND Wire
MARK A B C PT
421
402
PT-43LC14 PT-50LC14 PT-60LC14 NOT USED
421
Top Duct 3 Unit
Note: Refer to Item 3 of Schematic Diagram Notes of Schematic Diagram and Circuit Board Layout Notes, for mark "PT."
13
PT-43LC14 / PT-50LC14 / PT-60LC14
WIRE AND LEAD POSITION DIAGRAM OF THE UNIT
After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit. Note: Use extreme care especially for the following.
Clamper Clamper RF Input Terminal Thermal Fuse Unit
Fan 3
GND Wire AC Cord
Fig. 9-1
14
PT-43LC14 / PT-50LC14 / PT-60LC14
After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit. Note: Use extreme care especially for the following.
P2303 (From Thermistor 1 C.B.A.)
Thermistor 2 C.B.A.
P2902 (From Fan 1) Lamp Cable
Lamp Sockets
P2501 (From Main C.B.A.)
P2901 (From Main C.B.A.)
P2904 (From Fan 3)
P2502 (From Cover Switch C.B.A.)
Clamper P2304 (From Thermistor 2 C.B.A.)
P2903 (From Fan 2)
Clamper Fan 4
Ballast C.B.A. P1306 (From Thermal Fuse Unit)
Fig. 9-2
15
PT-43LC14 / PT-50LC14 / PT-60LC14
After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit. Note: Use extreme care especially for the following. P6305 (From Operation C.B.A.) No connection
Speaker Connector Leads
P5501 (From Front Jack C.B.A.)
P6004 (From Tuner C.B.A.)
Clampers
P3501 (From Tuner C.B.A.)
P3502 (From Front Jack C.B.A.) P4505 (To Tuner C.B.A.) P4501 (From Power C.B.A.) Clamper P6002 (From Ballast C.B.A.) GND Plate A P3401 (From Power C.B.A.) Clamper P3504 (From Front Jack C.B.A.) P3603 (From Audio Amp C.B.A.)
P4503 (From Speaker)
P3402 (From LCD Drive C.B.A.) P5302 (From LCD Drive C.B.A.)
P805 (From Ballast C.B.A.) Clamper
20-pin Cable
Connector Cable Fig. 9-3
16
PT-43LC14 / PT-50LC14 / PT-60LC14
After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best operation of the unit. Note: Use extreme care especially for the following.
P1001 (To Ballast C.B.A.)
P3401 (To Main C.B.A.)
P805 (To Ballast C.B.A.)
Clamper P4501 (To Audio Amp C.B.A.) P1009 P1010 P1011
P1007
Clamper
P804 P1006 (To Fan 4) AC Cord
Fig. 9-4
17
PT-43LC14 / PT-50LC14 / PT-60LC14
5 DISASSEMBLY / ASSEMBLY PROCEDURES
5.1. CABINET SECTION
CABINET SECTION
DISASSEMBLY METHOD OF CABINET SECTION
Cabinet section contains following removal procedures:
REMOVAL OF THE BALLAST C.B.A. AND THE TV/TUNER UNIT FROM THE CABINET REMOVAL OF THE PROJECTION UNIT FROM THE CABINET REMOVAL OF THE TUNER C.B.A., THE MAIN C.B.A., THE REAR JACK C.B.A., THE AUDIO AMP C.B.A., THE POWER C.B.A. FROM THE TV/TUNER UNIT REMOVAL OF THE SCREEN UNIT AND THE SPEAKER FROM THE DISPLAY REMOVAL OF THE MIRROR FROM THE BACK COVER REMOVAL OF THE FRONT JACK C.B.A. AND THE OPERATION C.B.A. FROM THE CABINET REMOVAL OF THE COVER SWITCH C.B.A. FROM THE CABINET
DISASSEMBLY FLOWCHART
This flow chart indicates the disassembly steps of the cabinet parts and the P.C.Boards in order to gain access to item (s) to be serviced. When reassembling, perform the step (s) in the reverse order. Bend, route and dress the wires as they were originally.
REAR COVER LAMP COVER FRONT COVER UNIT SPEAKER
OPTICAL COVER NETWORK C.B.A.
PROJECTION UNIT BALLAST C.B.A. THERMISTOR 2 C.B.A. FAN 3 UNIT
SCREEN UNIT
MIRROR
OPERATION C.B.A.
TV/TUNER UNIT TUNER C.B.A.
THERMAL FUSE UNIT
TOP DUCT 3 UNIT
BACK PANEL (DISPLAY)
FRONT JACK C.B.A. MAIN C.B.A. AUDIO AMP C.B.A. REAR JACK C.B.A.
POWER C.B.A.
THERMISTOR 1 C.B.A. (LCD/PRISM UNIT, LIGHT IN POLARIZER, ETC) COVER SWITCH C.B.A.
Note : a. Place a cloth or some other soft material under the P.C. Boards or Unit to prevent damage. b. When reinstalling, ensure that the connectors are connected firmly and electrical components have not been damaged. c. Do not supply power to the unit during disassembly and reassembly.
18
PT-43LC14 / PT-50LC14 / PT-60LC14
REMOVAL OF THE BALLAST C.B.A. AND THE TV/TUNER UNIT FROM THE CABINET
1. (PT-43LC14/PT-50LC14) Remove the Rear Cover by removing the 18 Screws (401).
Rear Cover
401
Fig. D1-1-1 1. (PT-60LC14) Remove the Rear Cover by removing the 20 Screws (401, 464).
Rear Cover
401
464
Fig. D1-1-2
19
PT-43LC14 / PT-50LC14 / PT-60LC14
2. Remove the Rear Support Plate by removing the 4 Screws (401, 452).
Rear Support Plate
401
401
Fig. D1-2
452
20
PT-43LC14 / PT-50LC14 / PT-60LC14
3. 1) 2) 3) 4) 5)
Remove the 5 Screws (402) and remove Clamper-1. Remove the 2 Screws (451) on the Lamp Socket. Disconnect the Lamp Connector. Avoiding the Ballast C.B.A., disconnect Connector P1306 (Thermal Fuse Unit) inside of the Ballast C.B.A. Remove the Clamper from the Ballast C.B.A.
Clamper-1
402
Lamp Socket
451
Lamp Connector Note: Do not remove the Thermal Fuse Unit. Ballast C.B.A. Clamper-1
451
Clamper
P1306
Fig. D1-3
402
Replacement Note of Ballast C.B.A.: These parts will be necessary when replacing the Ballast C.B.A. Set aside, and keep and re-use. · The Clamper on Ballast C.B.A. · The Thermal Fuse Unit
21
PT-43LC14 / PT-50LC14 / PT-60LC14
4. 1) Disconnect Connector P2901 (Connector Cable) and release them from the clamper. 2) Disconnect Connector P2501 (20-pin Cable) and release it from the clamper. CAUTION: Take extreme care not to damage the 20-pin Cable when disconnecting. 5. 1) Disconnect Connectors P3502, P3504, P5501, P4503, P6305 and release them from the clampers. 2) Remove the Screw (452) on the GND Plate A. 3) Remove the Screw (401) on the TV/Tuner Ass'y. 4) Lift up and slide the TV/Tuner Ass'y by releasing the 7 Guide Tabs. CAUTION: Do not slide the TV/Tuner Unit before removing the 20-pin Cable.
GND Plate A
452
P2501 P2901 Clamper
P5302
CAUTION: 20-pin Cable
P5501 P6305
Connector Cable
452
TV/Tuner Ass'y P4503 P3504 P3502 Clampers
401
Fig. D1-4
Slot holes
holes
TV/Tuner Ass'y
Guide Tabs (X5)
Guide Tabs (X2)
Rear
Fig. D1-5 Replacement Note of TV/Tuner Unit: These parts will be necessary when replacing the TV/Tuner Unit. Set aside, and keep and re-use. · 20-pin Cable
22
PT-43LC14 / PT-50LC14 / PT-60LC14
6. 1) Pull off the TV/Tuner Ass'y with the Ballast C.B.A. while taking care with the cables. 2) Remove the GND Plate A from the TV/Tuner Unit by removing the Screw (452). 3) Remove the SD Door Unit from the TV/Tuner Unit by releasing the 2 Locking Tabs.
holes Locking Tabs Slide SD Door Unit
Ballast C.B.A.
GND Plate A
452
TV/Tuner Unit
Fig. D1-7-1 Reassembly Note: When installing the SD Door Unit, install the SD Door Unit with the 2 Locking Tabs from the front of the cabinet after installing the TV/Tuner Unit into the cabinet.
Reassembly Note: Locking Tabs SD Door Unit
Fig. D1-7-2
Replacement Note of TV/Tuner Unit: These parts will be necessary when replacing the TV/Tuner Unit. Set aside, and keep and re-use. · The GND Plate A · The SD Door Unit
23
PT-43LC14 / PT-50LC14 / PT-60LC14
7. 1) Disconnect Connectors P6002, P805, P1001 and release them from the clampers. 2) Then, remove the Ballast C.B.A.
P6002 Clamper P1001 Clamper P805
Fig. D1-8
Ballast C.B.A.
24
PT-43LC14 / PT-50LC14 / PT-60LC14
REMOVAL OF THE PROJECTION UNIT FROM THE CABINET
1. Remove the Ballast C.B.A. and the TV/Tuner Unit. Refer to Steps 1~6 in "REMOVAL OF THE BALLAST C.B.A. AND THE TV/ TUNER UNIT FROM THE CABINET." 2. 1) Disconnect Connector P2502. Then, hook the P2502 cable to the pin. 2) Remove the 7 Screws (401) on the Projection Unit. 3) Lift up and slide the Projection Unit by releasing the 5 Guide Tabs. Tips on removal of the Projection Unit: First, slide the Projection Unit to the rear (approx. 1.5 inch (4 cm)). Then, lift up the front and the rear portions of the Projection Unit by both hand to release the Guide Tabs. Then, slide out the Projection Unit. Or, remove the Fan 3 Unit from the Projection Unit at first. Refer to Fig. D2-3.
CAUTION: Disconnect Connector P2502 and hook it as follows. P2502 Pin Cable
Cover Switch C.B.A. Boss
Tips on removal of the Projection Unit
Slide
4 1 3 2
P2502
Up
by approx. 1.5 inch (4 cm).
Up
1 Lift up and slide the Projection Unit 2 2 Lift up the front portion. 3 Lift up the rear portion. 4 Slide out the Projection Unit.
Up
3
Up
401
Fig. D2-1
25
PT-43LC14 / PT-50LC14 / PT-60LC14
CAUTION: Disconnect Connector P2502 and hook it as follows. P2502 Pin Cable
Guide Tabs (X5)
Cover Switch C.B.A.
Rear
Projection Unit Slide
holes
Fig. D2-2 Reassembly Note: Before installing the Projection Unit, confirm that the P2502 cable is hooked to the pin. Then, install the Projection Unit to the cabinet.
26
PT-43LC14 / PT-50LC14 / PT-60LC14
3. 1) Disconnect Connector P2904, and remove the Fan 3 Unit by removing the 2 Screw (402). 2) Remove the Top Duct 3 Unit by removing the 4 Screws (421). CAUTION: When removing the Screws (421) on the Top Duct 3 Unit, plastic dust may be produced. Therefore, confirm that there is no dust on the Top Duct 3 Unit. If there is dust, clean the Top Duct 3 Unit with a brush, etc. Otherwise, dust may adhere to the inside of the screen. 3) Remove the Lamp from the Projection Unit by loosening the Screw.
21 Projection Unit
Screw for lamp
Lamp
Clamper
Fan 3 Unit
P2904
402
GND Wire
421
402
421
Fig. D2-3
Top Duct 3 Unit
Replacement Note of Projection Unit (Ref. No. 21): These parts will be necessary when replacing the Projection Unit (Ref.No. 21). Set aside, and keep and re-use. · Fan 3 Unit · Top Duct 3 Unit
27
PT-43LC14 / PT-50LC14 / PT-60LC14
REMOVAL OF THE TUNER C.B.A., THE MAIN C.B.A., THE REAR JACK C.B.A., THE AUDIO AMP C.B.A., THE POWER C.B.A. FROM THE TV/TUNER UNIT
CAUTION: 1. Be sure to make a note of the CURRENT LAMP value (value A) in Service Mode (1/3): LAMP OPERATION TIME is stored in EEPROM on the Main C.B.A. Therefore, before removing the Main C.B.A. or the TV/Tuner Unit at the user's location, make a note of the CURRENT LAMP value (value A) in Service Mode (1/3). Then, after installing the new Main C.B.A. or the TV/Tuner Unit at the user's location, set the CURRENT LAMP value to the original value (value A) in Service Mode. Otherwise, OSD and LED Lamp replacement indications will be displayed at the wrong time. Note: In case it is impossible to make a note of the CURRENT LAMP value because of a defective Main C.B.A., ask the customer their daily average use and the approximate age of the current Lamp. Then, calculate the CURRENT LAMP value as follows and make a note. Daily average use Approx. age CURRENT LAMP X = (hours) (days) (hours) 1. Remove the TV/Tuner Unit and the Ballast C.B.A. Refer to Steps 1~7 in "REMOVAL OF THE BALLAST C.B.A. AND THE TV/ TUNER UNIT FROM THE CABINET." 2. 1) Disconnect Connectors P6004, P3501 and release from the clampers. 2) Remove the Tuner C.B.A. by removing the 4 Screws (402).
TV/Tuner Unit
402
Tuner C.B.A.
P6004
Clampers
Fig. D3-1
P3501
28
PT-43LC14 / PT-50LC14 / PT-60LC14
3. 1) 2) 3) 4) 5)
Disconnect Connector P3401 and release from the clamper. Disconnect Connector P3402 and remove the Connector Cable. Remove the Tuner P.C.B. Frame by removing the 6 Screws (402). Release the AC Cord from the slot of the Rear Jack Holder. Remove the Rear Jack Holder by removing the 4 Screws (402).
402
Tuner P.C.B. Frame
Connector Cable
P3401
P3402
402
Rear Jack Holder
Slot
AC Cord
Clamper
402 402
Fig. D3-2
29
PT-43LC14 / PT-50LC14 / PT-60LC14
4. Remove the Main C.B.A. by removing the 6 Screws (402) and disconnecting Connector P3403 and P3404.
402
Main C.B.A.
P3404 P3403
Fig. D3-3
30
PT-43LC14 / PT-50LC14 / PT-60LC14
5. 1) Disconnect Connector P3603 and release from the clamper. 2) Remove the Rear Jack C.B.A. and the GND Plate C from the slots by removing the 2 Screws (402).
Slots
Rear Jack C.B.A. GND Plate C
P3603
402
Fig. D3-4 6. 1) Disconnect Connector P4501 and release from the clamper. 2) Remove the Audio Amp C.B.A. by removing the 4 Screws (402). Note: The Audio Amp C.B.A. can be removed from the TV/Tuner Unit at any time.
Audio Amp C.B.A.
402
402
Clamper P4501
Fig. D3-5
31
PT-43LC14 / PT-50LC14 / PT-60LC14
7. 1) 2) 3) 4)
Disconnect Connector P1006 and release from the clamper. Remove the Main P.C.B. Frame by removing the 6 Screws (402), and remove the Fan 4 by removing the 2 Screws (435). Remove the Power C.B.A. by removing the 5 Screws (411). Disconnect Connector P804 (AC Cord) and release from the clamper.
402
Fan 4 Clamper
435
Main P.C.B. Frame
Air Flow
Name Plate
402
411
Power C.B.A.
Clampers P804
AC Cord
P1006
411
Fig. D3-6 Reassembly Note for Fan 4: Install the Fan 4 with the 2 Screws (435) so that the name plate (manufacture's name etc.) face out (visible from the outside).
Note: After servicing the Power C.B.A., be sure to connect the Connector P1006 on the Power C.B.A. to install the Fan 4.
32
PT-43LC14 / PT-50LC14 / PT-60LC14
REMOVAL OF THE SCREEN UNIT AND THE SPEAKER FROM THE DISPLAY
1. 1) Remove the Front Cover Unit from the 8 latches. 2) Remove the Optical Cover by removing the 2 Screws (454). 3) Remove the 2 Screws (401) from front side.
latches
Optical Cover
454
401
latches
401 454
Front Cover Unit
Fig. D4-1 2. (PT-43LC14/PT-50LC14) Remove the Rear Cover by removing the 18 Screws (401), refer to Fig. D1-1-1. (PT-60LC14) Remove the Rear Cover by removing the 20 Screws (401, 464), refer to Fig. D1-1-2.
33
PT-43LC14 / PT-50LC14 / PT-60LC14
3. 1) Disconnect Connector P4503 (speaker cables) and release it from the clamper. 2) Remove the 2 Screws (401) from rear side, and remove the Display.
Display
401
401
P4503 Clamper
Fig. D4-3
34
PT-43LC14 / PT-50LC14 / PT-60LC14
4. 1) Remove the Speaker-L and the Speaker-R by removing the 6 Screws (477, 478) and disconnect the connectors P4553. 2) (PT-43LC14/PT-50LC14) Remove the Screen Unit by removing the 16 Screws (401).
Screen Unit
Speaker L
401 477
P4553
477 478 401
Speaker R
P4553
477
Fig. D4-4-1
478 477
35
PT-43LC14 / PT-50LC14 / PT-60LC14
2) (PT-60LC14) Remove the Screen Unit by removing the 26 Screws (401).
Screen Unit
Speaker L
401 477
P4553
478 401
477
Speaker R
P4553
477
Fig. D4-4-2
478 477
36
PT-43LC14 / PT-50LC14 / PT-60LC14
5. (PT-43LC14) Remove the 2 Screen Plate H and 2 Screen Plate V by removing 26 Screws (401), and remove the Fresnel Lens and the Lenticular Screen. (PT-50LC14) Remove the 2 Screen Plate H and 2 Screen Plate V by removing 30 Screws (401), and remove the Fresnel Lens and the Lenticular Screen.
Screen Unit
Escutcheon
Screen Lenticular Plate H Screen Fresnel Lens Screen Plate V
401
Serial No. Label Screen Plate V
401
Screen Plate H
Front Serial No. Label of Lenticular Screen Serial No. Label of Fresnel Lens
Fig. D4-5-1 Reassembly Note: Install them so that Serial No. Labels are on the each outside as shown above. Replacement Note for Screen Unit: The Screen Unit is supplied as a unit, or the individual parts (Fresnel Lens, Lenticular Screen) in the Screen Unit are also supplied. When replacing the Fresnel Lens and the Lenticular Screen, take care that dust, etc., does not adhere between the Fresnel Lens and the Lenticular Screen. Due to this risk, it is strongly recommended to replace the Screen Unit as a unit.
37
PT-43LC14 / PT-50LC14 / PT-60LC14
(PT-50LC14) Reassembly Note for 4 Spacers: Wind the string for screen spacer on the Fresnel Lens a shown.
Fresnel Lens
string for screen spacer
Serial No. Label string for screen spacer hook string for screen spacer hook
knot hook hook
38
PT-43LC14 / PT-50LC14 / PT-60LC14
(PT60LC14) Remove the 2 Screen Plate H and 2 Screen Plate V by removing 40 Screws (465), and remove the Fresnel Lens and the Lenticular Screen.
Screen Unit
Lenticular Screen
Screen Fresnel Spacer Plate H Lens Screen Plate V
Escutcheon Spacer Spacer
465
Serial No. Label Spacer
465
Screen Plate V
Screen Plate H
Front Serial No. Label of Lenticular Screen Serial No. Label of Fresnel Lens
Spacer
Fig. D4-5-2 Reassembly Note: Install them so that Serial No. Labels are on the each outside as shown above. Replacement Note for Screen Unit: The Screen Unit is supplied as a unit, or the individual parts (Fresnel Lens, Lenticular Screen) in the Screen Unit are also supplied. When replacing the Fresnel Lens and the Lenticular Screen, take care that dust, etc., does not adhere between the Fresnel Lens and the Lenticular Screen. Due to this risk, it is strongly recommended to replace the Screen Unit as a unit.
39
PT-43LC14 / PT-50LC14 / PT-60LC14
(PT-60LC14) Reassembly Note for 4 Spacers: Place the 4 Spacers on the Lenticular Screen as shown.
Approx. 1330.5 mm ~ 1332.0 mm 11.0 mm ~ 12.5 mm 18.5 mm ± 2.0 mm Spacer
2.5 mm ± 1.5 mm
11.0 mm ~ 12.5 mm 18.5 mm ± 2.0 mm Spacer
2.5 mm ± 1.5 mm
Lenticular Screen
Lenticular Screen
Edge of Escutcheon Spacer 2.5 mm ± 1.5 mm
Edge of Escutcheon Spacer 2.5 mm ± 1.5 mm
Escutcheon
Approx. 725.5 mm ~ 754.0 mm
Lenticular Screen Spacer
Spacer
2.5 mm ± 1.5 mm Edge of Escutcheon
2.5 mm ± 1.5 mm Edge of Escutcheon
Spacer
2.5 mm ± 1.5 mm
Lenticular Screen Touch the bosses
Serial No. Label
2.5 mm ± 1.5 mm
Lenticular Screen Touch the boss
Spacer 18.5 mm ± 2.0 mm 11.0 mm ~ 12.5 mm
Spacer 18.5 mm ± 2.0 mm 11.0 mm ~ 12.5 mm
Approx. 1330.5 mm ~ 1332.0 mm
40
PT-43LC14 / PT-50LC14 / PT-60LC14
REMOVAL OF THE MIRROR FROM THE BACK COVER
(PT-43LC14/PT-50LC14) 1. Remove the Screen Unit. Refer to Steps 1~4 in "REMOVAL OF THE SCREEN UNIT AND THE SPEAKER FROM THE DISPLAY." 2. 1) Remove the 2 Mirror Holder H and the 2 Mirror Holder V Unit by removing the 12 Screws (401). 2) Remove the Mirror from the top by releasing the Back Cover slots. Note: Be careful that the Mirror does not fall down when removing.
Mirror Holder H Back Cover slots
401 401
401 401
Mirror Holder V Unit
Fig. D4-6-1 Reassembly Notes for Mirror: Install the Mirror as following procedures: 1) Place the 3 sheets on the top and bottom edges of the Mirror.
(PT-43LC14)
0 mm ~ 5 mm Sheet Sheet 0 mm ~ 5 mm 60 mm 10 mm Sheet
(PT-50LC14)
Sheet 60 mm 10 mm
Top edge of Mirror
10 mm ~ 15 mm
10 mm ~ 15 mm
10 mm ~ 15 mm
10 mm ~ 15 mm
Sheet
15 mm ~ 20 mm
15 mm ~ 20 mm
15 mm ~ 20 mm
Mirror surface
Mirror surface
15 mm ~ 20 mm
Sheet Bottom edge of Mirror
3 mm
5 mm
Sheet
3 mm
5 mm
20 mm
5 mm
Sheet
20 mm
5 mm
Fig. D4-7-1 2) Hold the sheet portions of the Mirror, and insert the Mirror from the top into the Back Cover slots carefully. When handling the Mirror, do not touch the Mirror surface. 3) Install the 2 Mirror Holder H and the 2 Mirror Holder V on the Mirror and tighten the 12 Screws (401).
41
PT-43LC14 / PT-50LC14 / PT-60LC14
REMOVAL OF THE MIRROR FROM THE BACK COVER
(PT-60LC14) 1. Remove the Screen Unit. Refer to Steps 1~4 in "REMOVAL OF THE SCREEN UNIT AND THE SPEAKER FROM THE DISPLAY." 2. 1) Remove the 3 Mirror Holder H and the 2 Mirror Holder V Unit by removing the 15 Screws (401). 2) Remove the Mirror from the top by releasing the Back Cover slots. Note: Be careful that the Mirror does not fall down when removing.
Mirror Holder H Back Cover slots
401
Mirror Holder V Unit
401
Fig. D4-6-2 Reassembly Notes for Mirror: Install the Mirror as following procedures: 1) Place the 3 sheets on the top and bottom edges of the Mirror.
10 mm ~ 20 mm
10 mm ~ 15 mm
Sheet
Sheet
Sheet
10 mm ~ 20 mm
10 mm ~ 15 mm
Top edge of Mirror
Sheet
15 mm ~ 20 mm
Mirror surface
15 mm ~ 20 mm
Sheet Bottom edge of Mirror
18 mm ~ 28 mm
Sheet
18 mm ~ 28 mm
Fig. D4-7-2 2) Hold the sheet portions of the Mirror, and insert the Mirror from the top into the Back Cover slots carefully. When handling the Mirror, do not touch the Mirror surface. 3) Install the 3 Mirror Holder H and the 2 Mirror Holder V on the Mirror and tighten the 15 Screws (401).
42
PT-43LC14 / PT-50LC14 / PT-60LC14
REMOVAL OF THE FRONT JACK C.B.A. AND THE OPERATION C.B.A. FROM THE CABINET
1. 1) 2) 2. 1) 2) 3) 4) 5) Remove the Rear Cover by removing the 18 Screws or 20 Screws (PT-60LC14). Disconnect Connector P6305 and release it from the clamper. Remove the Front Cover Unit from the 8 latches. Remove the Screw (454). Slide the Front Side Cover R with the Operation C.B.A. as indicated by the arrow to release the 4 slots. Pull off the Operation C.B.A. from front side. Remove the Operation C.B.A. and the Operation Button Unit from the Front Side Cover R by removing the 4 Screws (421).
slots
Operation Operation Button Unit C.B.A. 421
P6305 Slide
421
Bosses Front Cover Unit
3. 1) 2) 3) 4)
Clampers
454 Front Side
Cover R
Fig. D5-1
Disconnect Connectors P3502, P3504, P5501 and release them from the clampers. Remove the 2 Screw (401). Pull off the Front Jack C.B.A. from front side. Remove the Front Jack C.B.A. from the Side Jack Holder by removing the 2 Screws (421) and releasing the 2 Locking Tabs.
Front Jack C.B.A.
421
P5501
Boss Locking Tabs Side Jack Holder
Fig. D5-2
P3504 P3502 Clampers
401
43
PT-43LC14 / PT-50LC14 / PT-60LC14
REMOVAL OF THE COVER SWITCH C.B.A. FROM THE CABINET
1. Remove the Projection Unit. Refer to Steps 1~2 in "REMOVAL OF THE PROJECTION UNIT FROM THE CABINET." 2. 1) Remove the Front Cover Unit from the 8 latches. 2) Remove the Optical Cover by removing the 2 Screws (454). 3) Remove the Screw (401) from the front side.
latches
Optical Cover
454
401
latches
454
Front Cover Unit
Fig. D6-1 4) To remove the Cover Switch C.B.A., remove the Display Support Plate L with the Cover Switch C.B.A. by removing the 2 Screws (401). 5) Remove the Cover Switch C.B.A. by removing the Screw (402).
Bosses
Cover Switch C.B.A.
402
Display Support Plate L
Fig. D6-2
401
Reassembly Note: When installing the Display Support Plate L with the Cover Switch C.B.A., install it with the Lamp Cover removed.
44
PT-43LC14 / PT-50LC14 / PT-60LC14
6 ADJUSTMENT PROCEDURES 1
WHEN REINSTALLING THE PROJECTION UNIT INTO THE UNIT AT THE USER'S LOCATION:
The following ADJUSTMENT of the Projection Unit must be performed. a. Mechanical Picture Position Adjustment b. Focus Adjustment Note: Perform this adjustment only if necessary. (Normally, it will not be necessary.) c. Electrical Picture Position Adjustment Preparation of ADJUSTMENT: 1. Install all parts except the Front Cover Unit and the Optical Cover. 4. 1) Then, press and hold the VOLUME DOWN button on the unit and the SWAP key on the remote for more than 1 second. The unit will go into the Factory Adjust Mode. (FACTORY ADJUST menu will appear.)
F 4 D U N H R A 0 E N CTORY ADJUST 1/1 5252 S:04052002 O ADJ D
M: V S F O P
0 I O A T A
ER TIAL
DEFAULT SET (SELF CHECK)
Fig. M1-3 2) Then, press the CH UP/DOWN key on the remote to select "OTHER" on menu and press the OK key. (OTHER menu will appear.) Projection Unit
OTHER 1/1 RGB1
O O F G
P P I C
T H T V LTE :04
POSI POSI R DET 0525
0C 06 6B
(With Front Cover Unit and Optical Cover removed) Fig. M1-1 Note: When the rear cover is disassembled, the screen can be moved back and forth, which could affect the video display vertical position. This could also cause the vertical adjust to be at or near its limit. Only try the picture position adjustment with the rear cover assembled! 2. Turn the power on. 3. Press and hold the VOLUME DOWN button on the unit and the RECALL key on the remote for more than 5 seconds in power on condition. The unit will go into Work Mode. ("WORK MODE" will appear on the screen.)
(OTHER menu 1/1)
Fig. M1-4 5. Press the VOLUME UP/DOWN key on the remote. (Focus screen will appear.)
O P T O P T
H P O S I V P O S I
0 C 0 6
RGB1
To release this mode: 1. After completing the ADJUSTMENT, press the CH UP/ DOWN key on the remote to return to the OTHER menu. 2. Then, press RECALL key twice to return to Work Mode, and press and hold the VOLUME DOWN button on the unit and the RECALL key on the remote for more than 5 seconds. Alternatively, turn off the power. 3. Then, install the Optical Cover with the 2 Screws and the Front Cover Unit.
C-COR/GAM/W-BAL PUSH RECALL 5SEC WORK MODE
Fig. M1-2
45
PT-43LC14 / PT-50LC14 / PT-60LC14
a. Mechanical Picture Position Adjustment (Tilt)
1) Loosen the 4 Screws on the Projection Unit.
b. Focus Adjustment
1) Confirm that each of the pixels in the nine portions is clearly visible.
Projection Lens Screw Screw Screw Screw
O P T O P T H P O S I V P O S I 0 C 0 6
Twist
Twist
2) If not, loosen the Knob on the Projection Lens until the Knob can be moved.
Knob Tighten Loosen
Fig. M1-5 2) Adjust the Projection Lens by twisting so that the long line "g" and the long line "h" are within 4 dots. (The long line "g" and the long line "h" will be almost aligned horizontally.)
(PT-60LC14) CAUTION: Do not turn the screw and nut.
Up
O P T O P T O P T O P T H P O S I H P O S I V P O S I V P O S I 0 7 0 C 0 9 0 6
Down
"G" long line "g"
long line "h"
"H"
Fig. M1-6 3) Adjust the Knob by moving up or down so that each of the pixels in the nine portions is clearly visible to obtain the best focus. 4) Tighten the Knob. Note: Focus Adjustment is not normally necessary. Perform this adjustment only if necessary.
"G"
within 4 dots
"H"
Note: If the Projection Lens is twisted left, the Focus Screen twists left. If the Projection Lens is twisted right, the Focus Screen twists right. 3) Tighten the 4 Screws while fixing the Projection Lens.
46
PT-43LC14 / PT-50LC14 / PT-60LC14
c. Electrical Picture Position Adjustment
1) Adjust OPT HPOSI so that "C" is symmetrical to "D." by pressing the VOLUME UP/DOWN key on the remote to change the value. 2) Press the CH UP/DOWN key on the remote to return to the OTHER menu. 3) Select OPT VPOSI by pressing CH UP/DOWN key on the remote. 4) Adjust OPT VPOSI so that "A" is symmetrical to "B" by pressing the VOLUME UP/DOWN key on the remote to change the value.
"E" "I"
O P T O P T H P O S I V P O S I 0 C 0 6
"A"
"F" "J"
"C"
"D"
"K" "G" "B" "H"
"L"
"C"
"D" width "c" = width "d" width "c" "A" width "a" width "a" = width "b" width "b" "B" width "d"
5) Confirm that all "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L" are each almost symmetrical. 6) If not, adjust the "OPT HPOSI" and "OPT VPOSI" (repeat steps 1-6) until the picture is in the correct position. 7) Press the CH UP/DOWN key on the remote to return to the OTHER menu.
47
PT-43LC14 / PT-50LC14 / PT-60LC14
7 ADJUSTMENT PROCEDURES 2
INITIAL GUIDELINE
The table below shows which adjustments are necessary according to the unit parts and individual parts to be replaced. Make sure to perform these adjustments shown below as necessary.
Tuner C.B.A. is included in TV/Tuner Unit Tuner1 (Main Tuner) IC7501 (MTS/SAP Signal Process)
Replacement Parts Adjustment Item Tuner C.B.A. Separation Adjustment (VR Adjustment) Adjustment Section Note: : Adjustment Item Fig. E1-1
Section
Adjustment Item
Necessary Equipment
·MTS/SAP Signal Generator ·Oscilloscope ·Plastic Tip Driver
Input
MTS Signal (Only L CH, 300Hz, 30% Modulating) RF (TV)
Tuner C.B.A. Separation Adjustment Adjustment (VR Adjustment) Section
Fig. E1-2
TEST EQUIPMENT
To do all of these electrical adjustments, the following equipment is required. 1. Dual-Trace Oscilloscope Voltage Range: 0.001 V to 50 V/Div. Frequency Range: DC to 50 MHz Probes: 10:1, 1:1 2. NTSC Video Pattern Generator 3. Plastic Tip Driver and Non-Metal Driver 4. MTS/SAP Signal Generator (TV Multi-Channel Sound Modulator (U.S.A.))
48
PT-43LC14 / PT-50LC14 / PT-60LC14
HOW TO READ THE ADJUSTMENT PROCEDURES
Connecting Point (Test Point) of Oscilloscope Adjustment component
Supply NTSC COLOR BAR SIGNAL to the Video Input Connector
SEPARATION ADJUSTMENT (VR ADJUSTMENT)
Purpose: To separate the L and R Channels of Stereo Signal. Symptom of Misadjustment: The L and R Channels of Stereo Signal will not be separated properly resultin in no stereophonic effect.
TP TP3602 TP3603
ADJ. R3662
INPUT
TP
(Video input Connector) NTSC Color Bar Signal
ADJ. R7514
INPUT (RF Input Terminal) MTS (ONLY L CH) 300 Hz±5 Hz 30 % Modulating SPECIFICATION Refer to Description below
TP7501
EQUIPMENT Oscilloscope, NTSC Video Pattern Generator
SPECIFICATION A=0.2 V ± 0.06 V DC
EQUIPMENT
Equipment required for adjustment Specification for Adjustment
Oscilloscope MTS/SAP Signal Generator Plastic Tip Driver
Fig. E2-1 Note: TP7501, R7514: Tuner C.B.A.
CH1
CH2
CH1: TP3603 2V
1 2
CH2: TP3602 10 µs 1
6 4 5 2 Volts/DIV (CH1) 4 Connecting Point 6 Trigger Channel of the Scope 1 : CH1 2 : CH2
1V
3
1. Connect the MTS/SAP Signal Generator to the RF Input Terminal. Then, set the MTS/SAP Signal Generator as follows. MTS (ONLY L CH) 300 Hz ± 5 Hz 30 % Modulating 2. Set to TV mode by pressing TV/VIDEO key on the remote and then set to STEREO audio mode by pressing SAP key on the remote. 3. Connect the Oscilloscope to TP7501 on the Tuner C.B.A. 4. Adjust R7514 (SEPARATION) on the Tuner C.B.A. so that the signal level is minimum.
1 Connecting Point 3 Volts/DIV (CH2) 5 Time/DIV
Minimum
Fig. E2-2
75 % White
100 % White
TP7501(R CH) 20 mV
Fig. E3
1 ms
75 % Color Bar Signal (Standard)
Fig. E2-3
49
PT-43LC14 / PT-50LC14 / PT-60LC14
TEST POINTS AND CONTROL LOCATION Tuner C.B.A.
SEPARATION R7514 TP7501
(Component Side)
Test Point Information Test Point with a Test Pin. Test Point with a jumper wire across a hole in the P.C.B. Test Point with no Test Pin. Test Point with a Hook.
50
PT-43LC14 / PT-50LC14 / PT-60LC14
8 TROUBLESHOOTING HINTS FOR BLOCK LEVEL REPAIR
MAIN PARTS LOCATION
Network C.B.A.
Lamp Cover Cover Switch C.B.A.
TEMP LED LAMP LED Network C.B.A.
Optical Cover Front Cover Unit Operation C.B.A. POWER LED
Projection Unit Thermal Fuse Unit Thermistor 1 C.B.A. Air Filter Fan Case Unit (Fan 1) Thermistor 2 C.B.A. Fan 3
Front Jack C.B.A. Main C.B.A.
Ballast C.B.A. Tuner C.B.A.
Air Filter Air Filter
Fan 2 LCD Drive C.B.A.
Audio Amp C.B.A.
Fan 4
Rear Cover Power C.B.A. Rear Jack C.B.A. TV/Tuner Unit
51
PT-43LC14 / PT-50LC14 / PT-60LC14
ERROR INDICATION INFORMATION
Each LED indication facilitates finding the cause of the error. When an error is detected, the Lamp comes off and the LED on the front will flash.
POWER LED
TV/VIDEO
TEMP LED
LAMP LED
(Note 2) (Note 3) LAMP OFF
Error No.
1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17)
Error Information
Fan1, Fan2 or Fan3 stopped Lamp Cover open Temperature Sensor shorted or open (Thermistor 1 C.B.A.) Abnormal Temperature (Thermistor 1 C.B.A.) Ballast Error (abnormal Lamp or Ballast)
POWER LED
flashes orange once every 5 seconds flashes orange twice every 5 seconds -
TEMP LED
flashes once every 5 seconds flashes twice every 5 seconds -
LAMP LED
-
OSD
flashes once every 5 seconds flashes twice every 5 seconds flashes 3 times every 5 seconds flashes 4 times every 5 seconds flashes once every 5 seconds flashes twice every 5 seconds flashes 3 times every 5 seconds flashes 4 times every 5 seconds flashes 5 times every 5 seconds flashes 6 times every 5 seconds -
Ballast Error (abnormal Lamp voltage) Ballast Error (abnormal temperature) Ballast Error (other causes) Abnormal Voltage on 30 V line Abnormal Voltage on 9 V line Abnormal Voltage on 5 V line Abnormal Voltage on 3.3 V line Abnormal Voltage on -5 V line Abnormal Voltage on 6 V line Temperature Sensor shorted or open (Thermistor 2 C.B.A.) Abnormal Temperature (Thermistor 2 C.B.A.) Clogged air filter
flashes orange 5 times every 5 seconds flashes orange 6 times every 5 seconds flashes orange 7 times every 5 seconds flashes orange 8 times every 5 seconds flashes orange 9 times every 5 seconds flashes orange 10 times every 5 seconds -
flashes once every 5 seconds flashes twice every 5 seconds flashes 3 times every 5 seconds flashes 4 times every 5 seconds flashes 5 times every 5 seconds flashes 6 times every 5 seconds flashes 3 times every 5 seconds flashes 4 times every 5 seconds flashes 5 times every 5 seconds
Note: 1. When two or more errors have occurred at the same time, the LED will alternate flash patterns as shown above every 5 seconds. 2. Warning OSD appears when the air filter is clogged. 3. LAMP OFF: The LED will flash immediately after the Lamp comes off. 4.The detected error data will be stored in the EEPROM.
52
PT-43LC14 / PT-50LC14 / PT-60LC14
How to solve the problem indicated by the Error Indication of LED
(All symptom is that Lamp turns off or Lamp does not light up) Note: Before performing the troubleshooting, confirm that all connector cables in the unit are connected to connectors correctly. Error No.
1)
Problem
Cooling Fan (Fan1, Fan2 and/or Fan3) malfunction. NO
Possible Solution
Replace the Power C.B.A.Still NG, replace the Projection Unit. Still NG, replace the Main C.B.A. Replace the Projection Unit. Replace the Projection Unit. Replace the Fan3.
Are the Fan1, Fan2 and Fan3 operating?
Only the Fan1 stops. Only the Fan2 stops. Only the Fan3 stops.
2)
Mis-installed the Lamp Cover (the Lamp cover is open).
1. Tighten the screw of the Lamp Cover. 2. If still NG, replace the Cover SW (SW2911) on the Cover Switch C.B.A. 3. If still NG, replace the Main C.B.A. 4. If still NG, replace the Projection Unit. Remove P2303 connector on the LCD Drive C.B.A. and check if the resistance between pin1 and pin2 of P2811 on the Thermistor 1 C.B.A. is 5k 200k . If NG, replace the Temperature Sensor (R2811) on the Thermistor 1 C.B.A. Still NG, replace the Projection Unit. Still NG, replace the Main C.B.A. Note: The Projection Unit includes LCD Drive C.B.A.
3)
The temperature sensor (R2811) on the Thermistor 1 C.B.A. on the Fan 1 is short or open.
4)
It indicates when the temperature detected by the Temperature Sensor (R2811) on Thermistor 1 C.B.A. exceeds 55 °C (131 °F). 1. The surrounding temperature of the place of use may be too high. 2. The vents on the rear may be blocked.
1. Relocate the unit to a proper location. · Do not place in direct sunlight and other sources of direct heat. · Do not place the unit in humid or dusty location, or areas exposed to smokeor steam. (surrounding temperature should be between 0 °C (32 °F) and 40 °C (104 °F) and humidity should be between 20 % and 80 % (with no condensation).) · The vents are not blocked. It is recommended that a gap of at least 10 cm is left all around the unit even when it is placed inside a cabinet or between shelves. 2. Check if the fans are operating properly.
5)
1. Confirm that the Thermal Fuse Unit (115°C(239°F)) on the Lamp House is not open. The Lamp is not cooled off. Thermal Fuse Unit (115°C (239°F)) is defective (open). 2. Wait until the Lamp is cooled off and try to turn the power back on. If same error LED The Lamp is defective (crack). indication continues, remove the Lamp and visually inspect it. If it is cracked, it must be The Lamp voltage becomes more over 130V or less replaced. If the Lamp is not cracked, replace the Ballast C.B.A. than 30V. 3. If still NG, replace the Main C.B.A. 5. The Ballast C.B.A. is defective. 6. The Main C.B.A. is defective. 1. 2. 3. 4. The Lamp is defective (short of the Lamp). Thermal fuse (F1302) 117 °C (243 °F) on the Ballast C.B.A. is open due to abnormal temperature rise. The Ballast C.B.A. is defective. +30V line on the Main C.B.A. error. Replace the Lamp. Replace the Ballast C.B.A. If the Lamp does not light up after attempting turning on the power 2 or 3 times, replace the Ballast C.B.A. 1. Replace the Power C.B.A. 2. If still NG, replace the Main C.B.A. 3. If still NG, replace the Tuner C.B.A. 1. Replace the Power C.B.A. 2. If still NG, replace the Main C.B.A. 3. If still NG, replace the Rear Jack C.B.A. 4. If still NG, replace the Projection Unit. 1. Replace the Power C.B.A. 2. If still NG, replace the Main C.B.A. 3. If still NG, replace the Rear Jack C.B.A. 4. If still NG, replace the Tuner C.B.A. 5. If still NG, replace the Projection Unit. 1. Replace the Power C.B.A. 2. If still NG, replace the Main C.B.A. 1. Replace the Power C.B.A. 2. If still NG, replace the Main C.B.A. 1. Replace the Power C.B.A. 2. If still NG, replace the Main C.B.A. Remove P2304 connector on the LCD Drive C.B.A. and check if the resistance between pin1 and pin2 of P2821 on the Thermistor 2 C.B.A. is 5k 1M . If NG, replace the Temperature Sensor (R2821) on the Thermistor 2 C.B.A. Still NG, replace the Projection Unit. Still NG, replace the Main C.B.A. Note: The Projection Unit includes LCD Drive C.B.A.
6) 7) 8) 9)
10)
+9V line on the Main C.B.A. error.
11)
+5V line on the Main C.B.A. error.
12) 13) 14) 15)
+3.3V line on the Main C.B.A. error. -5V line on the Main C.B.A. error. +6V line on the Main C.B.A. error. The temperature sensor (R2821) on the Thermistor 2 C.B.A. on the Lamp House is short or open.
16)
It indicates when the temperature detected by the Temperature Sensor (R2821) on Thermistor 2 C.B.A. exceeds 85 °C (185 °F). 1. The surrounding temperature of the place of use may be too high. 2. The vents on the rear may be blocked.
1. Relocate the unit to a proper location. · Do not place in direct sunlight and other sources of direct heat. · Do not place the unit in humid or dusty location, or areas exposed to smokeor steam. (surrounding temperature should be between 0 °C (32 °F) and 40 °C (104 °F) and humidity should be between 20 % and 80 % (with no condensation).) · The vents are not blocked. It is recommended that a gap of at least 10 cm is left all around the unit even when it is placed inside a cabinet or between shelves. 2. Check if the fans are operating properly. 1. Cleaning the Air Filter on the Projection Unit. 2. If still NG, replace the Projection Unit. 3. If still NG, replace the Main C.B.A.
17)
Clogged air filter of the Fan Case Unit.
53
PT-43LC14 / PT-50LC14 / PT-60LC14
No picture or abnormal picture
Check that there is no picture or abnormal picture on the screen from all input terminals.
ABNORMAL PICTURE: No Color Picture (Black and White picture) Abnormal Color Picture No Synchronisation Picture Dark Picture
(All input are NG.)
Does the OSD appear on the screen? YES Replace the Main C.B.A.
NO
Replace the Projection Unit. Still NG, replace the Main C.B.A.
(Only Video1 OR 2 input is NG.) Replace the Rear Jack C.B.A.
(Only Video3 input is NG.)
Replace the Front Jack C.B.A. Still NG, replace Rear Jack C.B.A.
(Only tuner input is NG.)
Replace the Tuner C.B.A. Still NG, replace the Rear Jack C.B.A.
(Only RGB 1 input is NG.)
Replace the Main C.B.A.
(Only RGB 2 input is NG.)
Replace the Front Jack C.B.A. Still NG,replace the Main C.B.A.
(Only Component 1, 2, 3 OR 4 input is NG.)
In the case that one or some input is NG, it can be judged that the Projection Unit is OK.
Replace the Rear Jack C.B.A.
(Component 1, 2, 3 AND 4 input is NG.)
Replace the Main C.B.A. Still NG, replace the Rear Jack C.B.A.
(Only HDMI input is NG.)
Replace the Main C.B.A.
(Tuner, Component AND Video input is NG.)
Replace the Rear Jack C.B.A.
(PC/SD Card input is NG.)
Replace the Main C.B.A.
54
PT-43LC14 / PT-50LC14 / PT-60LC14
No sound from built-in both L-CH and R-CH Speakers
Check that there is an audio signal to the Audio Out Terminal from all input terminals. (All input are NG.) (Only Audio1, 2, Component 1, 2, 3, OR 4 input is NG.) Replace the Rear Jack C.B.A. Replace the Rear Jack C.B.A.
(Only Audio3 input is NG.)
Replace the Front Jack C.B.A. Still NG, replace the Rear Jack C.B.A.
(Only Tuner input is NG.)
Replace the Tuner C.B.A. Still NG, replace the Rear Jack C.B.A.
(Only RGB 1 input is NG.)
Replace the Main C.B.A.
(Only RGB 2 input is NG.)
Replace the Front Jack C.B.A. Still NG, replace the Main C.B.A.
(Only HDMI input is NG.) OK
Replace the Main C.B.A.
Replace the Audio Amp C.B.A. Still NG, Replace the Rear Jack C.B.A. Still NG, Replace the Power C.B.A.
No sound from built-in L-CH Speaker only
Press "MENU" button on the remote and select "BALANCE" in MENU screen. Then press "OK." NO
Does the "BALANCE" becomes center position? YES Replace the L-CH Speaker.
Set to the center position.
No sound from built-in R-CH Speaker only
Press "MENU" button on the remote and select "BALANCE" in MENU screen. Then press "OK." NO
Does the "BALANCE" becomes center position? YES Replace the R-CH Speaker.
Set to the center position.
55
PT-43LC14 / PT-50LC14 / PT-60LC14
56
PT-43LC14 / PT-50LC14 / PT-60LC14
9 BLOCK DIAGRAMS
OVERALL BLOCK DIAGRAM
REAR JACK C.B.A.
IC3502
COMPONENT AUDIO IN 1 (L/R) COMPONENT AUDIO IN 2 (L/R) COMPONENT AUDIO IN 3 (L/R) COMPONENT AUDIO IN 4 (L/R) AUDIO IN 1 (L/R) AUDIO IN 2(L/R) COMPONENT AUDIO IN1(L/