UB-T780 — Panasonic Other Service Manuals Service Manual (repair manual)

Model
UB-T780
Pages
89
Size
2.38 MB
Type
PDF
Document
Service Manual
Brand
Device
Other Service Manuals / ELECTRONIC BOARD (ELITE PANABOARD)
File
ub-t780.pdf
Date

View Panasonic UB-T780 Service Manual online

Order No.KM707123500CE
H19
Electronic Board (elite Panaboard)
Model No.
UB-T780
TABLE OF CONTENTS
PAGE
PAGE
1 General Precaution ---------------------------------------------- 3
2 Introduction -------------------------------------------------------- 5
2.1. Before using this manual -------------------------------- 5
2.2. Specification ------------------------------------------------ 6
2.3. Abbreviations ----------------------------------------------- 6
2.4. Trademarks ------------------------------------------------- 7
2.5. System Requirements------------------------------------ 7
2.6. Options, Accessories and Supplies ------------------- 7
2.7. External View ----------------------------------------------- 8
2.8. Exterior Dimensions -------------------------------------10
2.9. Main Components Location & PCB, Switch
and Sensors Identification------------------------------ 11
3 Instation Instructions -------------------------------------- 12
3.1. Instation Requirements ------------------------------ 12
3.2. Minimum Space Requirements ----------------------- 12
3.3. Included Accessories ----------------------------------- 13
3.4. W Mounting Construction --------------------------- 14
3.5. Preparing for Removing the elite Panaboard
from Its Packaging --------------------------------------- 16
3.6. Assembling the elite Panaboard --------------------- 17
3.7. Confirming the elite Panaboard Operation -------- 21
3.8. Repackaging ---------------------------------------------- 21
4 Electronic Pen Position Detection Mechanism ------- 22
5 Troubleshooting Guide 
--------------------------------------- 23
5.1. Error Code ------------------------------------------------- 23
5.2. Drawing Problem----------------------------------------- 24
5.3. Error Message on PC Screen------------------------- 25
5.4. Others------------------------------------------------------- 26
5.5. Requirement after replacing and servicing -------- 27
2
UB-T780
6 Disassembly and Assembly Instructions--------------- 28
6.1. LED Board and Control Board ------------------------ 28
6.2. Power Board----------------------------------------------- 30
6.3. Sensor (infrared, ultrasonic, thermo) Board ------- 31
6.4. Covers and AC Inlet ------------------------------------- 33
6.5. Electronic Pen--------------------------------------------- 44
7 Measurements and Adjustments -------------------------- 46
7.1. Adjustment for Electronic Pen ------------------------ 46
7.2. Receiver Level Adjustment ---------------------------- 49
8 Maintenance ------------------------------------------------------ 51
8.1. Maintenance Table--------------------------------------- 51
8.2. Cleaning the elite Panaboard ------------------------- 51
8.3. Replacing the Penpoint of the Electronic Pen ---- 51
8.4. Replacing the Battery in the Electronic Pen------- 52
9 Block and Connection Diagrams -------------------------- 53
9.1. Block Diagram -------------------------------------------- 53
9.2. Connection Diagram------------------------------------- 54
10 Explanation of Connector ------------------------------------ 55
11 Schematic Diagram--------------------------------------------- 57
11.1. Power Board----------------------------------------------- 58
11.2. Control Board --------------------------------------------- 59
11.3. Sensor Board and LED Board ------------------------ 66
11.4. Pen Board and Pen FPC------------------------------- 67
12 Printed Circuit Board ------------------------------------------ 68
12.1. Power Board----------------------------------------------- 68
12.2. Control Board --------------------------------------------- 69
12.3. LED Board ------------------------------------------------- 70
12.4. Sensor Board---------------------------------------------- 70
12.5. Pen Board-------------------------------------------------- 71
12.6. Pen FPC---------------------------------------------------- 71
13 Exploded View and Replacement Parts List ----------- 72
13.1. Screen Unit ------------------------------------------------ 73
13.2. Electronic Pen--------------------------------------------- 75
13.3. Packing ----------------------------------------------------- 77
13.4. Tool ---------------------------------------------------------- 79
13.5. Control Board --------------------------------------------- 80
13.6. LED Board ------------------------------------------------- 85
13.7. Power Board----------------------------------------------- 86
13.8. Sensor Board---------------------------------------------- 86
13.9. Pen PFC Board------------------------------------------- 88
13.10. Pen Board-------------------------------------------------- 88
3
UB-T780
1 General Precaution
1.1.
Safety Precaution
1.2.
Electrical Test
1. Unplug the power cord and check for continuity between the earth ground connection on the plug and the metal cabinet.
There should be zero ohm resistance.
2. With the unit unplugged, short the AC Live-Neutral of the plug with a jumper wire.
3. Turn ON the power switch.
4. Measure the resistance value with an ohmmeter between the shorted AC plug and each exposed metal cabinet part, such as
screwheads, etc.
Note:
Some exposed parts may be isolated from the chassis by design. They read infinity.
5. If the measurement is less than 1 M
Ω, a possibility for electric shock may exist.
Note:
This hazardous condition must be corrected before the unit is returned to the end user.
4
UB-T780
1.3.
For Service Technicians
• Repair service shall be provided in accordance with repair technology information such as service manual so as to pre-
vent fires, injury or electric shock, which can be caused by improper repair work.
1. When performing repairs, neither the product nor its parts or components shall be modified. 
2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced. 
3. FASTON terminals shall be plugged straight in and unplugged straight. 
• ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on worktable.
4. Do not touch IC or LSI pins with bare fingers.
1.4.
About Lead Free Solder (PbF: Pb free)
Note
• In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder
that contains lead.
• We will use PbF when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),
Silver (Ag), and Copper (Cu).
• This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and
repair work we suggest using the same type of solder.
Distinction of PbF PCB
• PCBs (manufactured) using lead free solder will have a PbF stamp on the PCB.
Caution
• PbF solder has a melting point that is 50 
°F - 70 °F, (30 ° - 40 °C) higher than Pb solder. 
Please use a soldering iron with temperature control and adjust it to 700 
°± 20 °F (370 ° ± 10 °C). 
• Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100
°F, (600°C).
• When applying PbF solder to double layered boards, please check the component side for excess solder which may
flow onto the opposite side (See figure, below).
1.4.1.
Suggested Pb free solder
We recommend you to use the following solder when re-soldering components for repair. Before using other Pb free solder than the
following solder, be sure to confirm that the solder maker (you use) has the license agreement for Pb free solder.
Supplier: Senju Metal Industry Co., Ltd. (http://www.senju-m.co.jp)
Part Description in Senju: EcoSolder RMA02 P3 M705 Series
1.5.
About RoHS
This product is fully compliant with the national laws transposed from the EU Directive on the restriction of the use of certain hazard-
ous substances (RoHS) in electrical and electronic equipment, effective 1 July 2006 in EU countries.
In order for the product to comply with the RoHS Directive, the six particular substances (lead, mercury, cadmium, hexavalent chro-
mium, polybrominated biphenyls, and polybrominated diphenyl ethers) have been either totally eliminated or limited to the concen-
tration level below maximum allowed. Consequently spare parts have been changed to RoHS-compliant parts where applicable.
Due to spare parts application of RoHS legislation, non-compliant spare parts cannot be used to repair compliant products put on
the EU market on or after 1 July 2006. Please therefore make sure to order and use RoHS-compliant spare parts listed in this man-
ual.
Page of 89

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