Philips 32PF9968/10 Service Manual page 33

Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.5.2 Main Tuner, CTF5513A (TUN1)
Block Diagram
1
AGC T u
Pin Configuration
2
3 4
AS SCL
Pin Symbol
1 AGC
2 TU
3 AS
4 SCL
5 SDA
6 UB
7 5V
8 N.C.
9 Vt
10 IF2
11 IF1
Figure 9-3 Internal block diagram and pin configuration of the main tuner
5V
UHF
5V
VH
5V
VL
5 6 7
SDA 5V
Description
Automatic gain control
For production process usage
Tuner Address Select
I2C serial clock
I2C serial data
5V supply voltage
Internal connection to pin 6
-
Tuning voltage (+32V)
IF output (balanced)
IF output (balanced)
TEH1.0E LA 9.
UHF VH VL
PLL
9
Vt
G_16510_061.eps
EN 33
10 11
IF2 IF1
011206