Wednesday, February 17, 2016

PANASONIC PT-LB50 – EXT Option menu – self check mode – how to access service mode – Projector repair and service

Category: Projector Repair and Service 

Contents of this article 

  • Service mode access 
  • Eat Option Menu
  • Self diagnostics 


PANASONIC PT-LB50

Ext Option
This projector has EXT OPTION in addition to standard on-screen menus.
There are SELF CHECK and SERVICE MODE for service, etc.
Procedure to enter EXT OPTION
1. Press "MENU" button on the main unit or remote control unit to display "MENU" screen, then select "OPTION" and press "ENTER" button.
2. Select "INPUT GUIDE" on "OPTION" menu and press "ENTER" button 3 seconds or longer.
MENU > OPTION > INPUT GUIDE
EXT OPTION Menu and Functions
# FREEZE MSG
Switching ON/OFF "FREEZE" on-screen display
# ANGLE RESET
Switching ON/OFF "Realtime Keystone" reference level setting
NOTE
Normally, do not select. (Angle reset data will be rewritten.)
# FAN FULL MODE
Setting the cooling fan motor rotation speed Switching ON "FAN FULL MODE", the rotation level of the fan becomes high-speed rotation (fixed). Moreover, when "FAN FULL MODE" is ON, changing "HIGHLAND" in OPTION becomes impossible (setting "FAN FULL MODE" is given priority more than "HIGHLAND").
# AUTOSETUP
Setting AUTO SETUP mode
STANDARD: To set the normal mode (the dot clock is adjusted strictly))
SPECIAL: To set the special mode (the dot clock is adjusted roughly)
Note:
Do not change the initial setting (STANDARD).
# SYNC
Setting SYNC processing mode
STANDARD: To set the normal mode
SPECIAL: To set the special mode (noise reduction mode)
Note:
Do not change the setting when it is possible to receive normally.
Change the setting only when the image is not displayed normally because of the sync signal noise of connected equipment.
# VGA60/480p
AUTO: Switching RGB of VGA60 and 480p automatically
VGA60: Inputting signals in 59.9Hz / VGA480
480p: Inputting signals in RGB of 480p
# SELF CHECK
To enter the self-check mode
# TEST PATTERN
To enter the service mode
# FLICKER ADJUST
To enter the flicker adjustment mode
# HPLL
When non-standard signal of VIDEO/S-VIDEO is inputted (VTR, VHD, etc.), horizontal synchronization might be disordered according to connected equipment. In this case, set HPLL to OFF.
Canceling EXT OPTION
Press "MENU" button on the main unit or remote control unit.
Self-Check Mode
This mode is used to narrow down the location of the failure.
Procedure to enter the self-check mode
Select "SELF CHECK" on "EXT OPTION" menu and press "ENTER" button on the main unit or remote control unit.
Canceling the self-check mode
Press "MENU" button on the main unit or remote control unit.
Service Mode
This mode is used to display seven kinds of test patterns [Horizontal lines, Vertical lines, Dots, Crosshatch, White cross, Black cross and White (No pattern)] in the four colors (White, Red, Green and Blue)..
Note:
# On the service mode, displays above patterns by each color without test equipment such as PC or SG. Use the service mode for simplified adjustments by your eyes and so on.
Procedure to enter the service mode
Select "TEST PATTERN" on "EXT OPTION" menu and press "ENTER" button on the main unit or remote control unit.
Note:
# In the service mode, pressing the up-arrow or down-arrow  button allows the test pattern selection and the left-arrow  or right-arrow  button the color selection (White / Red / Green / Blue).
Canceling the service mode
Press "MENU" button on the main unit or remote control unit.
Flicker Adjustment Mode
If replacing the optical parts (Analysis / LCD / Lens block) of this projector and/or A-P.C.Board (assembly), enter the flicker adjustment mode and minimize the flicker.
Procedure to enter the adjustment mode
Select "FLICKER ADJUST" on "EXT OPTION" menu and press "ENTER" button on the main unit or remote control unit.
Note:
"DESK setting (blue)" is displayed when entering the adjustment mode.
Adjustment Display and Contents
# Setting value is increased and decreased with the right-arrow and left-arrow  buttons.
: Decrease, : Increase
Adjust the setting value to minimize the flicker on the screen.
Execute the adjustment by 6 patterns below.
# The pattern (adjustment display) is switched with the up-arrow  and down-arrow  buttons.
: Forward direction,: Reverse direction
There are 6 patterns of "DESK setting (blue)", "DESK setting (red)", "DESK setting (green)", "CEILING setting (blue)", "CEILING setting (red)" and "CEILING setting (green)".
The setting value is saved into this projector when the pattern is switched.
Canceling the flicker adjustment mode
Press "MENU" button on the main unit or remote control unit.
Note:
When "MENU" button is pressed, the setting value at that time is saved into this projector and the adjustment mode is canceled.