PT-LW330, PT-LW280, PT-LB360, PT-LB330, PT-LB300, PT-LB280 (serv.man5) — Panasonic Projector Service Manual (repair manual)

Model
PT-LW330 PT-LW280 PT-LB360 PT-LB330 PT-LB300 PT-LB280 (serv.man5)
Pages
88
Size
35.19 MB
Type
PDF
Document
Service Manual
Brand
Device
Projector / LCD PROJECTOR
File
pt-lw330-pt-lw280-pt-lb360-pt-lb330-pt-lb300-pt-lb.pdf
Date

View Panasonic PT-LW330 / PT-LW280 / PT-LB360 / PT-LB330 / PT-LB300 / PT-LB280 (serv.man5) Service Manual online

Service Manual
Model No.  PT-LW330
PT-LW280
PT-LB360
PT-LB330
PT-LB300
PT-LB280
LCD Projector
ORDER NO.: VED1405505CE
Rev.-12 (2018-11)
This service manual is a common to the models regardless of suffixes of the Model No.
- U: U.S.A. region
- E: European region
- A: Asian region
- D: Indian region
-2-
Contents
Contents ....................................................................... 2
Safety Instructions ...................................................... 3
Safety precautions ...................................................... 4
Specifications .............................................................. 5
 Specifications ............................................................ 5
Circuit Protections ...................................................... 7
Thermal switch  .......................................................... 7
Lamp cover switch ...................................................... 7
Fuse (F2003) .............................................................. 7
Warning Temperature and Power Off Protection ........ 8
Maintenance ............................................................... 10
Before performing maintenance/replacement .......... 10
Maintenance ............................................................. 10
How to check the lamp runtime ................................ 14
Cleaning ................................................................... 15
Cleaning the projection lens ..................................... 15
Cleaning the projector cabinet .................................. 15
Security Function Notice .......................................... 16
Resetting procedure ................................................. 16
Standby Mode Notice ................................................ 17
Mechanical Disassembly .......................................... 18
Lighting block Disassembly ..................................... 29
Check Optical block model ....................................... 29
Adjustment ................................................................. 34
Adjustments after parts replacement ........................ 34
Optical adjustment .................................................... 35
Electrical adjustment ................................................ 36
Service adjustment menu operation ......................... 36
Circuit adjustment ..................................................... 37
Test points and locations .......................................... 38
Service adjustment data  .......................................... 39
EEPROM data transfer ............................................. 41
Model no. setting ...................................................... 43
Serial no. setting ....................................................... 45
Main CPU Firmware Update ..................................... 47
Sub CPU Firmware Update ...................................... 53
Block Diagrams ......................................................... 55
Main board control .................................................... 55
Power control circuit ................................................. 57
Power and protection loop ........................................ 58
Audio control circuit .................................................. 59
Fan control ................................................................ 61
Troubleshooting ........................................................ 62
No power .................................................................. 62
Starting Abnormality ................................................. 63
No picture ................................................................. 64
No audio output ........................................................ 65
Shutdown system ..................................................... 66
Error log .................................................................... 67
Serial control.............................................................. 68
<SERIAL IN> terminal .............................................. 68
Control Port Functions ............................................. 71
Parts Location Diagram & Parts List      ............SPL-1
Parts Location Diagram  .....................................SPL-2
Mechanical Parts List ........................................SPL-14
Schematic Diagrams ............................................DIA-2
-3-
Safety Instructions
The service technician is required to read and follow the "Safety Precautions" and "Important Safety Notice" 
in this service manual. 
Caution
Precaution
If using of this projector at an altitude of lower than 1,400m, set HIGHT ALTITUDE MODE to "OFF". 
Failure to observe this may cause malfunctions. 
If using of this projector at an altitude of higher than 1,400m and lower than 2,700m, set HIGHT ALTITUDE MODE to 
"ON". 
Failure to observe this may cause malfunctions. 
Never use this projector at an altitude of 2,700m or higher. 
Failure to observe this may cause malfunctions. 
(Refer to "PROJECTOR SETUP" menu in Operating Instructions.)
Using this projector at high altitude, consult your dealer or Authorized Service Center about preparations. 
About lead free solder (PbF)
This project is using the P.C. Board which applies lead free solder. 
Use lead free solder in servicing from the standpoint of antipollution for the global environment. 
 Lead free solder: Sn-Ag-Cu (tin, silver and copper) has a higher melting point (approx. 217°C) than standard solder. Typically the
melting point is 30-40°C higher. When servicing, use a high temperature soldering iron with temperature limitation function and set it to
370°C±10°C.
 Be precautious about lead free solder. Sn-Ag-Cu (tin, silver and copper) will tend to splash when heated too high (approx. 600°C or
higher).
 Use lead free solder for the P.C. Board (specified on it as "PbFree") which uses lead free solder. (When you unavoidably use lead
solder, use lead solder after removing lead free solder. Or be sure to heat the lead free solder until it melts completely, before applying
lead solder.)
After soldering to double layered P.C. Boards, check the component side for excess solder which may flow onto the opposite side.
About the identification of the lead free solder P.C. Board. 
For the P.C. Board which applies lead free solder, the symbol as shown in the figure below is printed or stamped on the 
surface or the back of the P.C. Board. 
 WARNING:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of 
the FCC Rules. 
These limits are designed to provide reasonable protection against harmful interference in a residential installation. 
This equipment generates, uses and can radiate radio frequency energy. If not installed and used in accordance with the 
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference 
will not occur in a particular installation. 
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning 
the equipment off and on, the user is recommended to try to correct the interference by one or more of the following 
measures: 
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio or TV technician for help.
CAUTION: Any unauthorized changes or modifications to this equipment will void the users authority to operate.
Warning
This service manual is designed for experienced repair technicians only and is not designed for use by 
the general public. 
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 serviced or repaired only by experienced professional 
technicians. Any attempt to service or repair the product or products dealt with in this service 
information by anyone else could result in serious injury or death. 
WARNING: Use UV Radiation eye and skin protection during servicing
-4-
Safety Instructions
Safety precautions
1.1.  General Guidelines
- For continued safety, no modification of any circuit must be attempted.
- Unplug the power cord from the power outlet before disassembling this projector.
- Use correctly the supplied power cord and must ground it.
- It is advisable to use an isolation transformer in the AC power line before the service.
-  Be careful not to touch the rotation part (cooling fan, etc.) of this projector when you service with the upper case
removed and the power supply turned ON.
-  Observe the original lead dress during the service. If a short circuit is found, replace all the parts overheated or
damaged by the short circuit.
-  After the service, all the protective devices such as insulation barriers, insulation papers, shields and isolation
R-C combinations must be properly installed.
- After the service, check the leakage current to prevent the customer from getting an electric shock.
1.2.  Leakage Current Check 
1.   Prepare the measuring circuit as shown in Fig. 1.
Be sure to use a voltmeter having the performance described in Table 1.
2. Assemble the circuit as shown in Fig. 2. Plug the power cord in a power outlet.
3. Connect M1 to T1 according to Fig. 2 and measure the voltage.
4. Change the connection of M1 from T1 to T2 and measure the voltage again.
5.  The voltmeter must read 0.375 V or lower in both of step 3 and 4. This means that the current must be 0.75mA
or less.
6.  If the reading is out of the above standard, the projector must be repaired and rechecked before returning to the
customer because of a possibility of an electric shock.
1.3.  UV Precaution and UHP Lamp Precautions
- Be sure to unplug the power cord from the power outlet when replacing the lamp.
-  Because the lamp reaches a very high temperature during its operation, wait until it cools completely when
replacing the Lamp Unit.
- The lamp emits small amounts of UV-radiation, avoid direct-eye contact with the light.
- The lamp unit has high internal pressure. If improperly handled, explosion might result.
- Because the high pressure lamp involves a risk of failure, never touch the lamp wire lead during the service.
Fig. 1
Fig. 2
Table. 2
Weighted leak = Vb/500A
Accuracy:
Input resistance:
Input capacity:
Frequency scope:
To power outlet
Insulation transformer
Connect
Projector
Measure 
circuit 
(Fig. 1)
Fig. 2
Table. 2
To T1 
or T2 
in Fig. 2
15HZ to 1MHZ
Voltmeter
(rms reading)
Performance
Page of 88
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  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).