Philips 32PFL3007H/12 Service Manual page 41

8.7 Diagram 10-2-2 System Power 2
Block diagram
LX LX
P-GND P-GND
Vup Vup
VoRX VoRX
VoTX VoTX
EXTM EXTM
DSQIN DSQIN
VCTRL VCTRL
Pinning information
B02, LNBH23QTR (IC U751)
ISEL ISEL
Rsense Rsense
EN EN
VSEL VSEL
Linear Post-reg Linear Post-reg
+Modulator +Modulator
+Protections +Protections
+Diagnostics +Diagnostics
TTX TTX TTX
NC
NC
SDA
P-GND
LX
NC
NC
NC
Figure 8-9 Internal block diagram and pin configuration
IC Data Sheets
TTX TTX ADDR ADDR SDA SCL SDA SCL
LNBH23
VSEL VSEL
TTX TTX
I²C interface I²C interface
ITEST ITEST
VOUT Control VOUT Control
TEN TEN
I²C Diagnostics I²C Diagnostics
22KHz 22KHz 22KHz
Oscill. Oscill. Oscill.
A-GND A-GND
LNBH23
back to
div. table
TPM9.1E LA 8.
Vcc Vcc Vcc Byp Byp Byp Vcc- Vcc- Vcc- L L L
Preregulator Preregulator
+U.V.lockout +U.V.lockout
+P.ON reset +P.ON reset
EN EN
22KHz Tone 22KHz Tone
DETIN DETIN
Amp. Diagn. Amp. Diagn.
22KHz Tone 22KHz Tone
Freq. Detector Freq. Detector
DSQOUT DSQOUT
NC
VCC-L
VCC
A-GND
VoRX
VoTX
NC
NC
19240_304_120221.eps
EN 41
120221
2012-Apr-27