Panasonic TH-50PB2E Service Manual ▷ View online
26
TH-50PB2E
6.6.
Failure diagnosis when electronic pen cannot charge with a charger
[Diagnosis when electronic pen cannot charge with a charger]
When the power LED of an electronic pen is blinking red, "loose connection of a charge cable",
"failure of an electronic pen", and "failure of a charger" can be considered.
Please perform failure diagnosis in the following procedure.
Procedure of Diagnosis
LED lighting red
LED lighting red
LED blinking red
LED blinking red
Charger cable,
Connect to CHARGE terminl
on the back of charger
Connect to CHARGE terminl
of display
External input terminal on the back of charger
[Connection of charger cable]
[Direct connection of charger cable]
Charger cable,
Connect to Charging
port of the electronic
pen
PC
Connect to USB
port of PC
or
Connect to CHARGE terminal
of display or
CHARGE/MEMORY terminal
of display or
CHARGE/MEMORY terminal
[LED indication when charging]
Charging: Lighting red
Charging error: Blinking red
Completion of charge: Lighting green
Connection error of a charger cable
or
Contact failure of the charger cable
or
Contact failure of the charger cable
Check connection
of the charger cable and
charge again.
Connect charger cable
to electronic pen directly
and charge.
External input terminal on the
back of charger
Failure of the charger
Failure of the electronic pen
27
TH-50PB2E
6.7.
Failure diagnosis at the time of wireless LAN fault
[1]Check of LAN microcomputer
[2]Check of Wireless module
Check the communication with the LAN microcomputer
[How to check]
The display check of "IC2004" column in a self check
or
The display check of the "LAN-MCU" column of CD mode
picture
or
The display check of the "LAN-MCU" column of CD mode
picture
IC2004
LAN-MCU
Normal
Abnormal
Display "OK"
Display the numbers
Display "----"
[Diagnostic result]
If the "Normal" judging
Go to [2] check.
If the "Abnormal" judging
Failure of the A board (LAN microcomputer)
Self check screen
[1]
[1]
[2]
CD mode screen
Status screen
[2]
[Preparations]
Turn off and turn on a main power supply before
a check. (Old information is eliminated
from a LAN microcomputer.)
a check. (Old information is eliminated
from a LAN microcomputer.)
The "MAC Address" column of the status
screen in the "Network Setup" menu
or
The "LAN-MAC (WIRELESS)" column of the
CD mode screen
screen in the "Network Setup" menu
or
The "LAN-MAC (WIRELESS)" column of the
CD mode screen
[Diagnostic result]
Normal
Abnormal
MAC Address
LAN-MAC (WIRELESS)
Display of hexadecimal digits
Display of "--:--:--:--:--:--"
Since the main part is normal, the check of
radio environment or a setup is required for it.
Failure of the wireless module (the antenna)
in rare cases.
radio environment or a setup is required for it.
Failure of the wireless module (the antenna)
in rare cases.
Failure of the wireless module
or
Breakage of the wireless module terminal
or
Breakage of the wireless module terminal
*: Since each information is checked immediately after power supply ON, it becomes the
shown of "-- :--:--:--:--: [ -- ]."
Since an information check is carried out in the order of cable LAN and wireless
LAN, when you diagnose, please wait for a while and check the contents of a display.
Since an information check is carried out in the order of cable LAN and wireless
LAN, when you diagnose, please wait for a while and check the contents of a display.
Display "NG"
Check the communication with a Wireless module
[How to check]
If the "Normal" judging
If the "Abnormal" judging
28
TH-50PB2E
7 Service Fixture & Tools
7.1.
SC jig
Purpose:
To find the failure board (SC or SU/SD) when the power LED is blinking 7 times.
SC jig:
Jumper connector to connect to SC50 connector on SC board
Part number:
TZSC09187
How to use:
Caution: Remove SC jig from SC board after inspection.
1. Remove all connector between SC board and SU/SD board to isolate SC board from both SU and SD board electrically.
Note: The board will be damaged if all connector is not removed (for example; remove connector only for SU board
and stay connecting with SD board. The board will be damaged.)
2. Connect SC jig to connector SC50 at left bottom side of SC board.
3. Turn on the TV/Display Unit and confirm the power LED blinking.
3. Turn on the TV/Display Unit and confirm the power LED blinking.
LED blinking: Possible cause of failure is in SC board
No LED blinking (Lighting or no lighting): Possible cause of failure is in SU or SD board
No LED blinking (Lighting or no lighting): Possible cause of failure is in SU or SD board
4. After inspection, turn off the TV/Display Unit and wait a few minutes to discharge.
5. Remove SC jig from SC board.
5. Remove SC jig from SC board.
29
TH-50PB2E
8 Disassembly and Assem-
bly Instructions
The important matter at the time of electronic pen
exchange
• Please register electronic pen, when electronic pen is
exchanged.
• There is a maximum in electronic pen's number of registra-
tion.
The important matter at the time of electronic pen adapter
exchange
• Since electronic pen's registration information is memorized
by the electronic pen adapter, in electronic pen adapter
exchange, re-registration of electronic pen is required for it.
(It is unrelated in the registration information, A-Board, and
the main part of a display of an electronic pen)
exchange, re-registration of electronic pen is required for it.
(It is unrelated in the registration information, A-Board, and
the main part of a display of an electronic pen)
The important matter in the case of exchanging modules
• To disassemble P.C.B., wait for 1 minute after power was off
for discharge from electrolysis capacitors.
• Please remove the clamper and tape of cables beforehand.
•
•
, , , ,
and
marks
indicate
screw
positions.
8.1.
Removal of Rear Cover
1. Remove screws (17
× ,
×23 ) and M8 Cap (×4 )
and
then remove the Rear Cover.
8.2.
Removal of Slot Block
1. Disconnect the connectors (DS13, P9), and remove the
flexible cable from the connector (DS1).
2. Remove screws and then remove the Slot Block.
8.3.
Removal of DS-Board
1. Remove the Slot Block.
(Refer to Removal of Slot Block)
2. Turn over the Slot Block.
3. Remove the screws and then remove DS-Board.
3. Remove the screws and then remove DS-Board.
8.4.
Removal of HX-Board
1. Disconnect the connector (A37).
2. Remove 4 Hexagonal-Head screws, 4 screws ( ) and 1
2. Remove 4 Hexagonal-Head screws, 4 screws ( ) and 1
screw ( ) and 1 screw ( ) and then remove the HX-
Board Block.
Board Block.
3. Turn over the HX-Board Block.
4. Disconnect the connector (HX1).
4. Disconnect the connector (HX1).
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