LG 42PA450C-CM (CHASSIS:PA23A) Service Manual ▷ View online
LGE Display Division LG(51)
Establish : 12. 01. 02 48
Reform : 12. 01. 02 48
Reform : 12. 01. 02 48
LG 전자
PD23A/B Product Specification
2) Measure average brightness in 9 points.
10.1.2 Contrast ratio measure specification
1) Test display signal : 30*30 dots White Window signal & all Black Raster signal
2) Dark room measure condition : Using touch type Color analyzer CA-210 or CS1000 Dark room in the non outside light
3) Bright room measure condition : In bright room of 150Lx illumination in the panel surface, locate a source of light on the above 45˚of the panel surface.
4) Measure method
A. The brightness of the white peak(Lw) position is measured while the 1%-window pattern is “ON”state. And then, it should be checked in 10 seconds after 1%-window is
“ON” state. The brightness of the black(Lb) is measured any point(Min.data) of panel.
B. The brightness of dark room is less than 1 lux.
Contrast ratio = Lw / Lb
If it does not use Prior measurement, use generally simple test measurement.
The Correct measure specification is followed by IEC61988-2/CD, JAPAN EIAJ-2710
11. Audio
*
The performance of audio can be achieved when digital amp parametric EQ off state.
And all the measurement should be done using dummy resistor (8ohm).
To make parametric EQ off state
-
Press In start key of adjust remote controller.
-
Select system menu.
⑦
④
①
⑨
⑥
③
⑧
⑤
②
LGE Display Division LG(51)
Establish : 12. 01. 02 49
Reform : 12. 01. 02 48
Reform : 12. 01. 02 48
LG 전자
PD23A/B Product Specification
-
Set audio EQ
Æ OFF (default: ON).
-
After finishing Audio performance test, then set audio EQ on state.
No
Item
Min
Typ
Max
Unit
Measurement
Result
Remarks
1. Audio S/N, Main (Mono)
40.0
dB
2. a Audio S/N, L/R
40.0
dB
3. Audio Buzz P/S Ratio
30.0
dB
4. Audio Noise Limited Sensitivity, M
-80.0
dBm
5. Audio Noise Limited Sensitivity, S
-70.0
dBm
6. Audio F Response Low, L/Mono
80.0
Hz
7. Audio F Response High, L/Mono
7.0
10.0
15.0
KHz
8. Audio F Response Low, R
80.0
Hz
9. Audio F Response High, R
7.0
10.0
15.0
KHz
10. Audio Bass Characteristic, L/R
3.0
6.0
9.0
dB
11. Audio Treble Characteristic, L/R
3.0
6.0
9.0
dB
12. Audio THD,L(Mono)/R
2.0
%
13. Audio Practical Max Output, L(Mono)/R
9
10
12
W
14. Audio Max Output, L(Mono)/R
9
10
12
W
L/R 10W*2
Test Condition : USE Service
Remote control (IN-START ->
5.System -> 7.Audio EQ On->Off)
Test Condition : USE Service
Remote control (IN-START ->
5.System -> 7.Audio EQ On->Off)
15. Max Distortion
20.0
%
16. Audio Residual Hum, L(Mono)/R
12.5
Uw
17. Dual Sound Cross-talk, Main/Sub
-45.0
dB
18. Stereo Separation, L/R
25.0
dB
19. Pilot Detection Sensitivity, Dual/Stereo
-70.0
dBm
20. Audio Balance Characteristic, L/R
50.0
mV
21. Audio Balance Deviation, L/R
1.5
dB
22. Deviation Linearity
250.0
%
LGE Display Division LG(51)
Establish : 12. 01. 02 50
Reform : 12. 01. 02 48
Reform : 12. 01. 02 48
LG 전자
PD23A/B Product Specification
No
Item
Min
Typ
Max
Unit
Measurement
Result
Remarks
23. Deviation 250% Max Distortion
10.0
%
24.
Output Level at Volume 30%
0.232
0.290
0.362
W
25. AV Audio Out Level, L/R
0.4
0.5
0.6
V
26. AV Audio Out Cross-talk, L/R
20.0
dB
27. AV Audio Out S/N, L/R
43.0
dB
28. AV Audio Out Frequency Response, Low
80.0
Hz
29. AV Audio Out Frequency Response, High
5.0
10.0
18.0
KHz
30. AV Audio Out Distortion
2.0
%
31. AV Audio In Level, L/R
0.87
1.2
V
32. AV Audio In S/N, L/R
43.0
dB
33. AV Audio In Frequency Response, Low
80.0
Hz
34. AV Audio In Frequency Response, High
5.0
10.0
18.0
KHz
35. AV Audio In Distortion
2.0
%
36. AV Audio In Dynamic Range
2.0
V
37. AV Audio In Max Distortion
10.0
%
38. AV Audio In Impandance,100Hz
10.0
Kohm
39. AV Audio In Impandance,1KHz
10.0
Kohm
40. Nicam Audio S/N, Main/Sub
45.0
dB
41. Nicam Audio Sensitivity
-75.0
dB
42. Nicam Audio P/N Ratio
30.0
dB
43. Nicam Audio F Response Low, L/R
80.0
Hz
44. Nicam Audio F Response High, L/R
5.0
10.0
18.0
KHz
45. Nicam Audio Distortion, L/R
1.0
%
46. Nicam Audio Separation, L/R
40.0
dB
47. Nicam Audio Output, L/R
9.0
10.0
12.0
W
LGE Display Division LG(51)
Establish : 12. 01. 02 51
Reform : 12. 01. 02 48
Reform : 12. 01. 02 48
LG 전자
PD23A/B Product Specification
No
Item
Min
Typ
Max
Unit
Measurement
Result
Remarks
48.
Speaker
Impedance
8
ohm
49. AVL
-8
8
dB
12. Power
No
Item
Min
Typ
Max
Unit
Measurement
Result
Remarks
1. AC Power Shut Down Voltage, SET
90
264
Vac
2. DC Voltage, Module Sustain voltage(Vs)
200 205 206
Vdc
50R4
Panel mark voltage±1%
(Full white H/R Pattern)
Panel mark voltage±1%
(Full white H/R Pattern)
2-1
DC Voltage, Module Sustain voltage(Vs)
201 205 206
Vdc
60R4
Panel mark voltage±1%
(Full white H/R Pattern)
Panel mark voltage±1%
(Full white H/R Pattern)
2-2
DC Voltage, Module Sustain voltage(Vs)
200 205 206
Vdc
50T4
Panel mark voltage±1%
(Full white H/R Pattern)
Panel mark voltage±1%
(Full white H/R Pattern)
2-3
DC Voltage, Module Sustain voltage(Vs)
203 205 207
Vdc
42T4
Panel mark voltage±1%
(Full white H/R Pattern)
Panel mark voltage±1%
(Full white H/R Pattern)
3. DC Voltage, Module Address voltage(Va)
54
55
56
Vdc
50R4, 50T4, 42T4,
Panel mark voltage±1.5%
(Full white H/R Pattern)
Panel mark voltage±1.5%
(Full white H/R Pattern)
3-1.
DC Voltage, Module Address voltage(Va)
59
61
Vdc
60R4
Panel mark voltage±1%
(Full white H/R Pattern)
Panel mark voltage±1%
(Full white H/R Pattern)
4. DC Voltage, Module Logic voltage(Vcc)
4.5
5
5.5
Vdc
5. DC Voltage, Stand by
3.40
3.5
3.61
Vdc
6. DC Voltage, Sound AMP
8.0
17
24.0
Vdc
STA338
7. DC Voltage, Sound AMP
3.0
3.3
3.6
Vdc
8. DC
Voltage,
Tuner
3.17
3.3
3.44
Vdc
9. DC
Voltage,
Tuner
1.74
1.8
1.86
Vdc
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