Panasonic PT-56SX30B Service Manual

ORDER NO. MTNC000524A1 B2
Service Manual
Color Video Projection Syste m
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Simplified Manual
(P4C)
Panasonic
Models
PT-56SX30B FP816 PT-56SX30CB FP816 PT-56D30B GP816 PT-56D30CB GP816
Note: Appearance may
vary depending on model characteristics.
This Simplified Service Manual is issued to add listed models to the Main Service Manual order No. MTNC000211C1. (PT-61D30B/CB) A full set of schematics, disassembly procedures, and a complete parts list are included in this Simplified Manu al. Please file and us e this Simplifi ed Service Manu al together with Ma in Service Ma nual, order No .
MTNC000211C1. (PT-61D30B/CB)
WARNING! This Service Manu al is desi gned for ex perienced repai r technicia ns only and is not des igned for us e by the g eneral publi c. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be se rviced or repaired only by experie nced profes sional tec hnicians . Any attempt to service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”
Chassis
The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in the Main Manual.
Copyright 2000 by M atsus hita Electri c Corpo ration of America. All rights reserved. Unauthorized copying
®
Important Safety Notice
Special components are used in this projecti on television which a re important for safety. These components are identified on the schematic diagram by the symbol and printed in BOLD TYPE on the replacement part list. It is
essential that these critic al parts are replac ed with th e manufact urer ’s speci fied repla cement part to prevent x -ray radiation, shock, fire or other hazards. Do not modify the original design without the manufacturer’s permission.
Safety Precautions
General Guidelines
An
isolation transformer
during the servicing of a PTV whose chassis is not isolated from AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect the PTV from being damaged by accidental shorting that may occur during servicing. When servicing, observe the original lead dress, especially in the high voltage circuit. Replace all damaged parts (also parts that show signs of overheating.) Always replace protective devices, such as fishpaper, isolation resistors and capacitors, and shields after servicing the PTV. Use only manufacturer ’s recommended rating for fuses, cir cuits breakers, etc. High potentials, as high as 32kV, are present when this PTV is operating. Operation of the PTV without the rear cover introduc es danger for el ectrical sho ck. Servicin g should not be performed by anyone who is not thoroughly familiar with the necessary precautions when servicing high-voltage equipment.
Extreme care should be prac ticed when handling the
picture tube
due to atmospheric pres s ure. (1 4.7 lb s. per sq . i n.). Do not nick or scratch the glass or subject it to any undu e pressure. When handling, use safety goggles and heavy gloves for protection. Discharge the picture tube by shorting the anode to chassis ground (not to the cabinet or to other mounting hardware). When discharging connect cold ground (i.e. DAG ground lead) to the anode with a well insulated wire or use a grounding probe.
. Rough handling may caus e it to implod e
should always be used
X-ray Precautions
The front area (between the projection tube and the lens) is enclosed by a metal box to ensure positive safety during normal and abnormal conditions when checking and repairing. To fully ensure safety, the following precautions must be observed.
1. Do not remove the lens or metal box.
2. Make sure to turn the power OFF when the le ns is removed or when checkin g the cleanliness of the lens.
3. Do not remove the lens or metal box to check the projection tube for oper ati on by watc hi ng i t di rec tly. Use a mirror or paper to view the image.
Before returning a serv iced PTV to the owner, the service technician must thoroughly test the unit to ensure that is completely safe to operate. Do not use a
line isolation transformer when testing.
Leakage Current Cold Check
Unplug the AC cord and connect a jumper between the two plug prongs. Press the POWER switch ON. Measure the re si stance betw e e n th e j um p ere d AC pl ug and expose metallic parts such as screw heads,
Service Manual
antenna terminals, control shafts, etc. If the exposed metallic part has a return path to the chassis, the reading should be between 240kand 5.2MΩ. If the exposed metallic part does not have a return path to the chassis, the reading should be infinite.
Leakage Current Hot Check (See Figure 1)
Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during the check. Connect a 1.5k 10 watt resistor in parallel with a
0.15µF capacitor between and exposed metallic part and ground. Use earth ground, for example a water pipe. Using a DVM with a 1000 ohms/volt sensitivity or higher, measure the AC potential across the resistor. Repeat the procedure and measure the voltage present with all other expose metallic parts. Verify any potential does not exceed 0.7 5 volt RMS. A leakage current tester (such a Simpson Model 229, Sencore Model PR57 or equivalent) may be used in the above procedure, in which case any current measure must not exceed 1/2 milliamp. If any measurement is out of the specified limits, there is a possibility of a shock hazard and the PTV must be repaired and rechecked before it is returned to the customer.
AC VOLTMETER
COLD WATER PIPE (GROUND)
0.15µF
TO INSTRUMENT’S EXPOSED METAL PARTS
Figure 1. Hot Check Circuit
1500Ω,10W
Insulation Test
Connect an insulation tester between an exposed metallic part and AC line. Apply 1080VAC/60Hz for 1 second. Confirm that the current measurement is 0.5mA ~ 2.0mA. Repeat test with other metallic exposed parts.
X-ray Radiation
WARNING: The potential source of X-ray radiation in the
PTV is in the hig h vo ltage section and the pict ure t ube .
Note: It is important to use an accurate, calibrated
high voltage meter.
Set brightness, picture, sharpness and color controls to Minimum. Apply a all black video signal. Measure the High Voltage. The high should be 31.5kV
±1.0kV. If the upper limit is out of tolerance, immediate service and correction is required to insure safe operation and to prevent the possibility of premature component failure.
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Important Safety Tests
Measuring H.V.
The anode caps are cemented to the CRTs. To gain access for high v oltage measurement, remove the red
CRT’s anode lead from the flyback transforme r (FBT) distributor. Grasp the anode lead protective cap at its bottom and squeeze it against the locking cap body inside. Rotate 1/4 turn coun ter clockwise and pull the anode lead sleeve out of the FBT distributor. Connect a high voltage lead (+) from y our H.V. meter to the FBT
distributor, and the common (-) to cold ground ( ). (See Figure 2).
1
Grasp protective
Anode lead
rubber cap
3
2
Squeeze & rotate
Discharge to CRT Chassis
cap counter­clockwise to remove
FBT Distributor
Figure 2. Removal of FBT leads
Note: Reinsert the anode lead into the FBT
distributor until it is tightly and fully seated. T urn the locking cap clockwise to lock in place.
(EHT) Protector Operation Check
With the cabinet ba ck removed, apply a n ominal 120V AC to the PTV.
Over Voltage Test Preparation:
1. Turn PTV “OFF”
2. Connect an NTSC signal generator to the antenna terminal.
3. Connect DVM (+) TPD4 and ( -) TPD5 on D-Boa rd. (See Figure 3)
4. Connect a H.V. meter (static type, class 0.1 ) with high voltage leads to high voltage distributor on FBT. (See Figure 4)
TPD5 TPD4
-
+
D-Board
DVM
Figure 4. DVM connected to D-Board.
5. Connect the 8 ~ 15 V DC variable power s upply to (+) TPB10 and (-) TPBGND, on B-Board.
Procedures:
1. Apply a monoscope pattern.
2. Adjust the Picture or Brightness controls so that the DVM reads 17.5 volts ± 0.5 volts.
3. Increase the variable po wer supply until set turns off. The set should turn off at 17.5 volts ± 0.5 volts (DVM) and high voltage less than 35.5kV.
4. If the DVM reading is other than 17.5volt (± 0.5 volts), repeat steps 2 and 3.
5. Turn off the variable supply and confirm that the set will turn on with the Remote Control.
CRT Protect Circuit
This circuit blanks the CRT in the event that there is a loss of vertical sweep. The circuit is not adjustable; however the circuit should be checked each time service is performed.
To check circuit:
1. Turn the PTV On an select an active channel.
2. Adjust Brightnes s and Picture control s for a visible picture.
3. On D-Board momentarily connect a shor t-jumper from TPD2 to TPDGND. The CRT shou ld blank. If this does not occur, repair must be performed before returning PTV to customer.
4. Remove short-jumper.
-
+
H.V. METER
FBT Distributor
CRT
CHASSIS
Figure 3. Measuring H.V.
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Service Manual
Important Safety Notice . . . . . . . . . . . . . . . . . . .2
Safety Precautions . . . . . . . . . . . . . . . . . .2
Important Safety Tests . . . . . . . . . . . . . . .3
Service Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PTV Feature Table. . . . . . . . . . . . . . . . . . . . . . . .7
PCB Designation . . . . . . . . . . . . . . . . . . . . . . . . .8
PTV - Location of Controls
PTV Front Control Panel . . . . . . . . . . . . .9
Remote - Location of Controls
EUR511151C . . . . . . . . . . . . . . . . . . . . .10
Board description . . . . . . . . . . . . . . . . . . . . . . .11
B+ Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Service Manual
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Service Notes
Note: These components are affixed with glue. Be careful not to break or damage any foil under the
component or at the pins of the ICs when removing. Usually applying heat to the component for a short time while twisting with tweezers will break the component loose.
Leadless Chip Component (surface mount)
Chip components must be replaced with identical chips due to critical foil tr ack spacing. There are n o holes in the board to mount standard transistors or diodes. Some chip capacitor or resis tor board so lder pads may have holes through the board, however the hole diameter limits standard resistor replacement to 1/8 watt. Standard capacitor may also be limited for the same reason. It is recommended that identical components be used. Chip resistor have a three digit numerical resistance code - 1st and 2nd significant digits and a multiplier. Example: 162 = 1 60 0 o r 1 .6 kΩ resistor, 0 = 0(jumper). Chip capacitors generally do not have the value indicated on the capacitor. The color on the component indicates the general range of the capaci tance. Chip transistors are identified by a two let t er c ode . The first letter indica ted the type an d the second letter, the grade of transistor. Chip diodes have a two lette r i den tif icati on c ode as per the code chart an d are a dual diode pack with either common anode or common cathode. Check the parts list for correct diode number.
Component Removal
1. Use solder wick to remove s older from compo nent end caps or terminal.
2. Without pulling up, carefully twist the component with tweezers to break the adhesive.
3. Do not reuse removed leadless or chip components since they are subject to stress fracture during removal.
Chip Component Installation
1. Put a small amount of solder on the board soldering pads.
2. Hold the chip component against the soldering pads with tweezers or with a miniature alligator clip and apply heat to th e pad area wi th a 30 watts iro n until solder flows. Do not appl y heat for more than 3 seconds.
TYPE
Chip Components
GRADE
c
c
SOLDER CAPS
How to Replace Flat-IC
- Required Tools -
Soldering iron De-solder braids
Iron wire or small awl • M agn ifi er
1. Remove the solder from all of the pins of a Fla t-IC by using a de-solder braid.
De-Solder
Flat-IC
2. Put the iron wire under the pins of the Flat-IC and pull it in the direction indicated while heating the pins using a soldering iron. a small awl can be used instead of the iron wire.
Iron Wire
Pull
Soldering Iron
Soldering Iron
3. Remove the solder from all the pads of the Fla t-IC by using a de-solder braid.
Soldering Iron
De-Solder Braid
Flat IC
4. Position the new Flat-I C in place (app ly the pins of the Flat-IC to the soldering pads where the pins need to be soldered). Properly determine the position of the sold ering pads and pins by correctly aligning the polarity symbol.
Polarity Symbol
5. Solder all pins to the soldering pads using a fine tipped soldering iron.
Braid
Awl
b
b
ANODES
MH DIODE
e
e
TRANSISTOR
COMMON CATHODE
SOLDER CAPS
CAPACITOR
1ST DIGIT
RESISTOR
2ND DIGIT
MULTIPLIER =1600 = 1.6k
Solder
Soldering Iron
6. Check with a magnifier for solder bridge between the pins or for dry join t between pi ns and sold erin g pads. To rem ove a solder bridge, use a de-solder braid as shown in the figure below.
De-Solder
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Solder Braid
Braid
Soldering Iron
Service Manual
Service Notes (Continued)
IMPORTANT: To protect against possible damage to
the solid state devices due to arcing or static discharge, make certain that all ground wires and CRT DA G wire are securely connected.
CAUTION: The power supply circuit is above earth ground and the chassis cannot be polarized. Use an isolation transformer when s ervicing the PTV to avoid damage to the test equipment or to the chassis. Connect the test equipment to the proper ground (( )
or ( )) when servicing, or incorrect voltages will be measured.
WARNING: This PTV has been designed to meet or exceed applicable safety and X-ray radiation protection
as specified by gove rnment a genci es and ind ependen t testing laboratories.
To maintain original product safety design standards relative to X-ray radiation and shock and fire hazard,
parts indicated with the s ymbol on the schematic must be replaced with identi cal parts. Order parts from
the manufacturer’s parts center using the parts numbers listed in this service manual, or provide the chassis number and the part reference number.
For optimum performance and readability, all other parts should be replaced with components of identical specification.
Service Manual
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Feature Table
FEATURE
Chassis P4C P4C Tunning system 144K 144K # of channels 181 181 Menu language Eng/Span/Fr Eng/Span/Fr Closed Caption (CC) X X V-Chip (USA/Canada) X X 2RF X X Antenna Picture In Picture (PIP) 2T 2T Remote control # EUR511151C EUR5111500 Screen protector X X Comb filter 3DIG Y/C 3DIG H. edge correction W/ VER W/ VER Y NR X -­VM X X V/A norm Both Both Color Temp X -­Dyn color/Peak white X X AIP X -­Natural AI X -­MTS/SAP/DBX X X Bass/Bl/Treb control X X AI sound Simple Simple Spatializer X X Built-in audio power 10W/CH (10%) 10W/CH (10%) # of speakers 2 2 A/V in (rear/front) 4 (3/1) 3(2/1) Component input 1 1 S-VHS in (rear/front) 2/1 1/0 Audio out Fixed & Variable Fixed & Variable A/V Prog Out X -­Dolby Center Ch In X -­Dimensions mm
WxDxH in Weight (kg/lbs) 116/255.7 116/255.7 Power source (V/Hz) 120V 60Hz 120V 60Hz Anode voltage 31.5kV ± 1.0kV 31.5kV ± 1.0kV
Video input jack Audio input jack 500mV RMS 47k 500mV RMS 47k
Input X X
PT-56SX30B
PT-56SX30CB
1196x683x1417
47x26.8x55.68
1V
75, phono
p-p
jack
PT-56D30B
PT-56D30CB
1196x683x1417
47x26.8x55.68
1V
75, phono
p-p
jack
Table 1: Feature Table
Specifications are subject to change without notice or obligation. Dimensions and weights are approximate.
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Service Manual
PCB Designation
BOARD
A-Board TNP2AH021 NIL AA Main chassis B-Board TNPH0121 AG AG Power supply C-Board TNPA1513 AB NIL Convergence D-Board TNPA0609 AB AB Protection circuit F-Board TNP2AA055 TNP2AA056AA Digital 3-line comb filter G-Board TNP2AA049 AC NIL Front A/V connections K-Board TNP2AA050 AC NIL Costumer controls LB-Board TNPA0784 BA BA Blue CRT drive LG-Board TNPA0783 BA BA Green CRT drive LR-Board TNPA0782 BA BA Red CRT drive N-Board TNP2AA027 AB AB 2nd tuner R-Board TNPA0615 NIL NIL Remote sensor
PT-56SX30B
PT-56SX30CB
PT-56D30B
PT-56D30CB
BOARD DESCRIPTION
T-Board TNP2AA045 AD AD Line filter X-Board TNP2AA063 NIL AA A/V inputs Y-Board TNPA1059 AC AC PIP processing
Table 2: PCB Designation
Note: The C & F-Board (TNPA1513 &
TNP2AA055 & TNP2AA056AA) are Non-Serviceable. If either board is
defective, replace the board with a new one, and return the defective board to the Service Center.
IMPORT ANT
This Simplified Service Manual includes only boards with particular application for the listed models, for the rest of the schematics and PCBs, with gen eral use in this chassis, refer to Main Service Manual MTNC000211C1 (PT-61D30B/CB)
Service Manual
- 8 -
PTV - Location of Controls
Note: Appearance may vary
depending on models characteristics.
POWER VOLUME CHANNEL ACTION TV/VIDEO
1 2 4 53
Figure 5. Location of Controls PTV
Quick Reference Control Operation
Quick Reference
Control Operation
1
2
3
Power - Press to turn ON or OFF.
Vo lu m e - Press to adjust Sound Le vel, or to adjus t Audio Menus, Video Me nus, and
select operating features when menus are displayed Channel - Press to s elect programm ed channels. Pres s to highlight desired features
when menus are displayed. Also use to select Cable Converter box channels after programming Remote Control Infra-red codes (the TV/AUX/CABLE switch must be set in CABLE position).
4
Action - Press to displ ay Main Menu and access On Screen f eature and Ad justment
Menus.
5
TV/Video - Press to select TV or one of two Video Inputs, for the Main Picture or the
PIP frame (when PIP frame is displayed).
- 9 -
Service Manual
Remote - Location of Controls
POWER Button Press to turn ON and OFF. MUTE Button Press to mute sound.
A second pres s resumes sound. Press also to access and delete Closed Caption display.
VCR, DVD, LD/CD, AUX, TV, CBL, DB S & RCVR Buttons
Component function buttons VOL (volume) Buttons Press to adjust TV sound level.
Use with Channel buttons to navigate in menus.
R-TUNE (Rapid Tune) Button. Press to switch to the previous
channel. ACTION Button Press to display Main Menu and access or
exit On Screen features and Adjustment Menus.
REW, PLAY, FF, TV/VCR, STOP, PAUSE, REC & VCR CHANNEL Buttons
Component function buttons. DBS EXIT& DBS GUIDE Buttons DBS function buttons.
Figure 6. Location of Controls (Remote)
EUR511151C
Service Manual
For additional information for this rem ote please refer to the Remote Guide, listed on the parts list.
- 10 -
BOARD DESCRIPTION
BOARD DESCRIPTION
A-Board Main chassis
B-Board Power supply C-Board Convergence D-Board Protection circuit F-Board Comb filter
G-Board A/V connections K-Board Costumer controls LB-Board Blue CRT drive LG-Board Green CRT drive LR-Board Red CRT drive N-Board 2nd tuner R-Board Remote sensor T-Board Line fil ter X-Board A/V inputs Y-Board PIP processing
MPU, Audio Amp, Convergence, Amp and Volt Regulation
Horizontal Deflection and High voltage protector
Digital Convergence EHT protector, over deflection
blanking, Vertical stop blanking Digital 3-line comb filter Front A/V connections Keyboard
2nd tuner processing Remote control board
VAO,FAO
B+ Voltages Table
Preparation:
Set the following controls
Picture..........................Normal.
Bright ...........................Normal.
Volume.........................Min. (0).
Procedure:
1. Apply a monoscope pattern.
2. Connect the (-) Lead of the Digital Voltmeter to TPBGND (Cold Ground) on B-Board.
3. Connect the (+) Lead of the Digital Voltmeter to Test Point (On B-Board) and confirm the B+ Voltages (See Table 3).
No. Test Point Voltage
1 TPB140 138.5±1.0 2 TPB15 15.0 3 TPB7 7.0±0.5 4TP23 23.0 5 TPB23N -23.5±1.0 6 TPB32 16.5
±1.0
±1.0
±1.0
Table 3: B+ Voltages Table
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Service Manual
REPLACEMENT PARTS LIST
Models: PT-56D30B, PT- 56D3 0CB, PT -5 6S X30 B & PT- 56 SX3 0CB
Important Safety Notice: Components printed in BOLD TYPE ha ve special characteristics important
for safety. When replacing any of these components use only manufacturer’s specified parts.
REF NO. PART NO. DESCRIPTION
CAPRISTORS
CR2801 EXNG131P365 RES-CAP 130PF/3.6 MEG CR2802 EXNG131P365 RES-CAP 130PF/3.6 MEG
CAPACITORS
C001 ECA1CM101 CAP,E 100UF/16V C004 TCUX1H103KBN CAP,C .01UF-K-50V C005 ECA1CM101 CAP,E 100UF/16V C006 ECA1HM4R7 CAP,E 4.7UF/50V C010 ECA1CM101 CAP,E 100UF/16V C011 ECJ2VC1H101J CAP,C 100PF-J-50V C012 ECJ2VC1H101J CAP,C 100PF-J-50V C013 ECA1HM220 CAP, E 22UF /50V C014 ECA1HM220 CAP,E 22UF/50V C015 ECJ2VC1H181J CAP,C 180PF-J-50V C016 ECJ2VF1C105Z CAP,C 1.0UF-Z-16V C017 ECJ2VF1C105Z CAP,C 1.0UF-Z-16V C023 ECJ2VC1H181J CAP,C 180PF-J-50V C024 ECA0JM102 CAP,E 1000UF/6.3V C027 ECEA1HNR47U CAP,E .47UF-50V C028 EEANA1E1R0B CAP,E 1.0UF-25V C029 ECA1HM010 CAP,E 1.0UF/50V C031 ECJ2VF1H103Z CAP,C .01UF-Z-50V C034 ECJ2VB1H272K CAP ,C .0027UF-K-50V C039 ECJ2VC1H220J CAP,C 22PF-J-50V C040 ECJ2VC1H270J CAP,C 27PF-J-50V C041 ECA0JM331 CAP,E 330UF/6.3V C042 TCUX1H103KBN CAP,C .01UF-K-50V C043 ECJ2VF1H103Z CAP,C .01UF-Z-50V C045 ECA1CM101 CAP,E 100UF/16V C046 ECJ2VF1H103Z CAP,C .01UF-Z-50V
PARTS LIST
C047 ECA0JM222 CAP,E 2200UF/6.3V C048 ECJ2VF1H103Z CAP,C .01UF-Z-50V C049 ECA1EM101 CAP,E 100UF/25V C050 ECA1EM471 CAP,E 470UF/25V C051 EEUFC1E470B CAP,E 47UF-25V C052 TACCX103T50V CAP,C .01UF/50V
REF NO. PART NO. DESCRIPTION
C053 ECJ2VF1H103Z CAP,C .01UF-Z-50V C054 TCUX1H103KBN CAP,C .01UF-K-50V C055 ECJ2VF1H103Z CAP,C .01UF-Z-50V C056 ECJ2VF1H103Z CAP,C .01UF-Z-50V C081 ECA1HM010 CAP,E 1.0UF/50V C101 ECJ2VF1H103Z CAP,C .01UF-Z-50V C140 ECJ2VC1H270J CAP,C 27PF-J-50V C301 ECEA1CN470U CA P,E 47UF-16V C302 ECA1HM010 CAP,E 1.0UF/50V C304 ECA1HM010 CAP,E 1.0UF/50V C305 ECJ2VF1H103Z CAP,C .01UF-Z-50V C306 ECA1HM220 CAP,E 22UF/50V C307 ECJ2VF1H223Z CAP,C .022UF-Z050V C308 ECA1HM3R3 CAP,E 3.3UF/50V C309 ECEA1HN010U CA P,E 1UF/50V C311 ECJ2VF1H103Z CAP,C .01UF-Z-50V C312 ECA1HM100 CAP,E 10UF/50V C313 ECA1VM470 CAP,E 47UF/35V C314 ECA1CM101 CAP,E 100UF/16V C315 ECA1EM220 CAP,E 22UF/25V C316 ECA1HM4R7 CAP,E 4.7UF/50V C317 ECA1HM4R7 CAP,E 4.7UF/50V C318 ECJ2VF1H103Z CAP,C .01UF-Z-50V C319 ECA1HM101 CAP,E 100UF/50V C320 ECJ2VF1H103Z CAP,C .01UF-Z-50V C321 ECA1CM101 CAP,E 100UF/16V C330 ECJ2VC1H101J CAP,C 100PF-J-50V C351 ECA2EM100 CAP,E 10UF/250V C353 ECKD2H103PU CAP,C .01UF-P-500V C354 ECA1CM101 CAP,E 100UF/16V C356 ECKD3D332KB CAP,C .0033UF-K-2KV C357 ECQB1H104JM CA P,P .1UF-J-50V C359 ECKD3D102KB CAP,C .001UF-K-2KV C360 ECA1CM470 CAP,E 47UF/16V C361 TACCW1 01T50V CAP,C 100PF/50V C363 ECKD3D102KB CAP,C .001UF-K-2KV
060-00
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Parts List
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