Panasonic CT-26WX15UN Service Manual - Page 8
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3.
Confirm that B+ voltage is 142V ± 6.0V. This voltage supplies B+ to the horizontal output and flyback circuits.
Source voltage chart
120V AC line input. Set the BRIGHT and the PICTURE to minimum by using the PICTURE menu. Use cold or hot ground for the (-) lead of the DVM as needed
A-BOARD
STBY 7V (BY IC006) A-Board TPA9
MAIN 9V (BY IC006) A-Board TPA90
MAIN 5V (BY IC2856) A-Board TPA15
GC 2.5V (BY IC2856) A-Board TPA25
STBY 3.3V (BY A13 CONNECTOR) A-Board TPA16 3.3V ± 0.2V
MAIN 3.3V (BY IC 2856) A-Board TPA33
D-BOARD
+B2 (BY D14 CONNECTOR) D-Board TPD50
30V (BY IC805) D-Board TPD19
15V (BY IC802) D-Board TPD7
-15V (BY IC805) D-Board TPD6
SOUND+ (BY D6 CONNECTOR) D-Board TPD4 17.2V + 1.5V -1.0
SOUND- (BY D6 CONNECTOR) D-Board TPD53
210V (BY IC503) D-Board TPD34
MAIN 12V (BY D14 CONNECTOR) D-Board TPD22
High voltage check
1.
Select an active TV channel and confirm that horizontal is in sync.
2.
Adjust BRIGHTNESS and PICTURE using PICTURE icon menu so video just disappears.
3.
Confirm B+ 142 ± 6.0V is within limit.
4.
Using a high voltage meter confirm that the high voltage is 28.5kV ± 0.3kV.
12 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 performed 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 familiar with 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.
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.
NOTE
After receiver is set into service mode, set TIMER back to NO.
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 service
and yellow "CHK" for aging.
7.
Press POWER on the remote control to display the service adjustment modes menu, select adjustment by pressing the volume right/left buttons and channel up/down buttons on the
remote and ACTION to enter the adjustment.
http://tsn.pstc.panasonic.com/viewing/NA/CT-26WX15N/SIMP/MTNC050528A1/doc/M...
VOLTAGE
7.5V ± 0.75V
9.0V ± 0.5V
5.2V ± 0.3V
2.6V ± 0.2V
3.3V ± 0.2V
VOLTAGE
142.0 ± 6.0V
33.5 ± 2.0V
14.5 + 1.5V -1.0
-15.5V ± 1.5V
-18.0V ±1.5V
211.0V ± 4.0V
12V ± 0.5V
Page 8 of 30
11/3/2008