Panasonic CT-27SL13MUG, Service Manual, Page: 107 / 149

A-BOARD TEST
POINT
VOLTAGE
+B2 TPD14 131.0 ± 2.0V
SOUND C823 (+) 18.1 ± 1.0V
STB12V C827 (+) 12.8 ± 1.0 V
220V TPA14 217 ± 10 V
VERTICAL TPD8
27.4 ± 1.5V
9V IC551 pin 3 9.0 ± 0.5V
5V IC552 pin 3 5.0 ± 0.5V
3.3V IC005 pin 2 3.3 ± 0.3V
EHT CRT anode 29.25 ± 1.25kV
HEATER JK351 H-
HGND 6.0 ± 0.24V
High voltage check
1. Select an active TV channel and confirm that horizontal is in sync.
2. Adjust BRIGHTNESS and CONTRAST using PICTURE icon menu
so video just disappears.
3. Using a high voltage meter confirm that the high voltage is 29.25 ±
1.25kV.
11. Service mode (electronic adjustments)
This receiver has electronic technology using the IC 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 now performedby 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.
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