Pioneer GEX-P900DAB Service Manual page 49

- Pin Functions (U2750B-BFS)
Pin No. Pin Name I/O
1 CP
2 TH
3 BDSW
4,5 GND
6 C1VC
7 B2VC
8 B1VC
9 C2VC
10 GND
11 VS
12,13 SWO1,2
14 NWAGC
15 SLI
16,17 SWI1,2
18,19 MXO1,2
20 VS
21 GND
22,23 MBI2,1
24,25 MAI2,1
26 GND
27,28 LO2,1
U2750B-BFS
28 27 26
BUF_LO
BAND
SWITCH
1 2
Function and Operation
O Charge pump output of comparator
I Threshold input of comparator
I Band switch input
GND
Collector pin 1 of VCO
Base pin 2 of VCO
Base pin 1 of VCO
Collector pin 2 of VCO
GND
Supply voltage
O Differential output of SAW-driver
AGC mode selection
AGC mode selection
I Differential input of SAW-driver
O Differential mixer output
Supply voltage
GND
I Differential input of mixer B
I Differential input of mixer A
GND
O Differential output of LO for PLL
25 24 23
MIXA
VCO
C1 B2 B1 C2
3 4 5 6
22 21 20 19
MIXB
VOLTAGE
STABILISATION
7 8 9 10
GEX-P900DAB
18 17 16 15
SAW-
DRIVER
11 12 13 14
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