procedures
All service adjustments are factory preset and should not require change unless controls and/or associated components are replaced.
140.0_V B+ voltage check
1.
Set the BRIGHT and PICTURE to minimum by using the PICTURE menu.
2.
Connect the DVM on TPD50 (D-Board by and cold ground
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
High voltage check
A-BOARD
VOLTAGE
STBY 7V (BY IC006) A-Board TPA9
7.5V ± 0.75V
MAIN 9V (BY IC006) A-Board TPA90
9.0V ± 0.5V
MAIN 5V (BY IC2856) A-Board TPA15
5.2V ± 0.3V
GC 2.5V (BY IC2856) A-Board TPA25
2.6V ± 0.2V
STBY 3.3V (BY A13 CONNECTOR) A-Board TPA16 3.3V ± 0.2V
MAIN 3.3V (BY IC 2856) A-Board TPA33
3.3V ± 0.2V
D-BOARD
VOLTAGE
+B2 (BY D14 CONNECTOR) D-Board TPD50
142.0 ± 6.0V
30V (BY IC805) D-Board TPD19
33.5 ± 2.0V
15V (BY IC802) D-Board TPD7
14.5 + 1.5V -1.0
-15V (BY IC805) D-Board TPD6
-15.5V ± 1.5V
SOUND+ (BY D6 CONNECTOR) D-Board TPD4 17.2V + 1.5V -1.0
SOUND- (BY D6 CONNECTOR) D-Board TPD53
-18.0V ± 1.5V
210V (BY IC503) D-Board TPD34
211.0V ± 4.0V
MAIN 12V (BY D14 CONNECTOR) D-Board TPD22
12V ± 0.5V
Page 8 of 32
7/7/2008
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