Panasonic CT-27SL13MUG Service Manual page 48

Use cold or hot ground for the (-) lead of the DVM as needed.
A-BOARD TEST
POINT
+B2 TPD14
SOUND C823 (+)
STB12V C827 (+)
220V TPA14
VERTICAL TPD8
9V IC551 pin 3
5V IC552 pin 3
3.3V IC005 pin 2
EHT CRT anode
HEATER JK351 H-
HGND
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 30.55 ±
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.
VOLTAGE
MDDA CRT SAMSUNG
CRT
131.0 ± 2.0V 131.0 ± 2.0V
22.7 ± 1.0V 22.7 ± 1.0V
12.8 ± 1.0 V 12.8 ± 1.0 V
217 ± 10 V 220 ± 10 V
27.4 ± 1.5V 25.4 ± 1.5V
9.0 ± 0.5V 9.0 ± 0.5V
5.0 ± 0.5V 5.0 ± 0.5V
3.3 ± 0.3V 3.3 ± 0.3V
29.25 ± 30.55 ± 1.25kV
1.25kV
6.0 ± 0.24V 6.3 ± 0.24V
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