LG 42PW350 - Main Board Tuner Explained

Main Board Tuner Explained
TU1300
Pop the cover off to expose the Tuner Pins. Or flip the board
over to access the back side of access to the pins.
Cf
18. IF p
17. IF n
16. IF AGC
15. Reset
14 3 3V TU
Check for Digital signal 700mV p/p
on pins 17 and 18.
C
heck
f
or Tuner B+:
+5V_TU Pin 3 (provided by IC507 pin 8)
1.2V_DE Pin 13 (provided by IC600 pin 1)
+3.3V Pin 14 (provided by IC506 pin 2)
14
.
3
.
3V
_
TU
13. 1.26V_TU
12. GND
11. CVBS
10. NC
9. SIF
8. NC
7. SDA
6. SCL
5. NC
4. NC
Data only present during channel
change on SDA/SCL. approx:. 4V p/p.
4.
NC
3. 5V_TU
2. NC
1. NC
Front bottom right hand side
June 2011 42PW350 Plasma
146
Front
bottom
right
hand
side