Panasonic CT27E13G - 27" COLOR TV, Service Manual

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12. Service mode (electronic adjustments)
This receiver has electronic technology using the I 2 C bus concept. It performs as a control
function and it replaces many mechanical controls. Instead of adjusting mechanical controls
individually, many of the control functions are nowperformed by using “on screen display
menu”. (The service adjustment mode).
NOTE
It is suggested that the technician reads all the way through and understand the following
procedure for entering/exiting the service adjustment mode; then proceed with the instructions
working with the receiver. When becoming familiarwith the procedure, the flow chart for service
mode may be used as a quick guide.
Quick entry to service mode
When minor adjustments need to be done to the electronic controls, the method of entering the
service mode without removal of the cabinet back is as follows using the remote control:
1. Select SET-UP icon and select CABLE mode.
2. Select TIMER icon and set SLEEP time for 30 Min.
3. Press “ACTION” twice to exit menus.
4. Tune to the channel 124.
5. Adjust VOLUME to minimum (0).
6. Press VOL (decrease) on receiver. Red “CHK” appears in upper
corner.
To toggle between aging and service modes:
While the “CHK” is displayed on the left top corner of the CRT, pressing “ACTION” and “VOL”
UP on the TV simultaneously will toggle between the modes. Red “CHK” for serviceand yellow
“CHK” for aging.
7. Press POWER on the remote control to display the service
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MC-Service