Measurements And Adjustments; Voltage Chart Of A Board; Voltage Chart Of P Board - Panasonic TX-42LZ80X Service Manual

9 Measurements and Adjustments

9.1.

Voltage Chart of A Board

Power name
MAIN_5V
BT_30V
24V
MAIN_8V
STB_3.3V
MAIN3.3V
STBY1.0V
MAIN1.0V
CORE1.0V
MAIN1.25V
MAIN1.8V
MAIN2.5V
SOUND_13.9V
SOS CHECK A BOARD
• TV-SOS Check
1. Connect Collector of Q2310 at TP 1850 (A-PCB parts side) to GND.
2. Check the set is OFF and LED is red blink 5 times repeating.
• INV_SOS
1. Apply DC 3.3V to Q2311 Collector AT TP 1849.
2. Check the set is OFF and LED is red blink 5 times repeating.
9.2.

Voltage Chart of P Board

Power name
PANEL_12V
BT_30V
24V
MAIN_8V
STB_3.3V
SOUND_13.9
1. Connect the dummy set and turn on the main power SW and check that each output voltage of test point is within the
specifications below.
CONDITION : Philip pattern - dynamic (Normal)
2. Turn off the power supply by the remote controller and set to standby and check that each output voltage of test point is within
the specifications below.
Test point
TP1823
TP1820
TP1818
TP1822
TP1835
Pin 8 A8-A
TP1838
TP3832
TP1842
TP1844
TP1847
TP1848
TP1816
Test point
TPP033
TPP015
TPP007
TPP006
TPP035
TPP028
- Sound Minimum
Specification
NORMAL
5.0 ± 0.25V
30.0V ± 2.0V
24.0 ± 1.2V
8.0V ± 0.4V
3.30 ± 0.17V
3.30 ± 0.17V
1.0V ± 0.05V
1.025V ± 0.017V
1.08V ± 0.019V
1.25V ± 0.05V
1.8V ± 0.07V
2.5V + 0.137V, -0.114V
13.9V ± 0.7V
Specification
NORMAL
12.0 + 0.60V, -0.45V
30.0V ± 2.0V
24.0 ± 1.2V
8.0V ± 0.4V
3.30 ± 0.17V
13.9V ± 0.7V
21
TX-42LZ80X/Y
STANDBY
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3.30 ± 0.17V
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1.0V ± 0.05V
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STANDBY
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3.30 ± 0.17V
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