Panasonic PT-47X54J Service Manual page 208

Preparation:
Set the following controls
- Picture to Normal
- Bright to Normal
- Volume to MIN (0)
Procedure:
1. Apply a COLOR BAR pattern
2. Connect the negative lead of the digital voltmeter to TPGND1 (cold
ground).
3. Connect the positive lead of the digital voltmeter to each test point
and confirm the B+ voltages.
No. D-Board Test point
1 TPD14
2 TPD13
3 TPD12
4 TPD11
5 TPD10
6 C845 (-)
No. A-Board Test point
1 TP41
2 TP44
3 TP39
4 TP54
5 TP55
15. Service Mode (electronic controls)
This receiver has electronic technology using the IIC 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.
15.1. Quick entry to service mode:
When minor adjustments need to be done to the electronic controls, the method for entering the
service mode without removal of the cabinet back is as follows, using the remote control:
1. Select SET-UP icon, enter "OTHER ADJ." menu and select CABLE
Voltage
138.6±1.0
20.0±1.5
19.5±1.5
-20.5±1.5
22.5±1.5
-22.5±1.5
Voltage
9.0±0.5
5.0±0.5
3.3±0.3
2.5±0.25
1.8±0.5
38