Pioneer GEX-P900DAB Service Manual page 46

GEX-P900DAB
- Pin Functions (U2730B-BFS)
Pin No. Pin Name I/O
1 NC
2 C
3 VCC1
4 VREF
5 TANK
6-8 GND
9 VCC2
10 TMD
11 TRD
12 CD
13 PD
14 PLCK
15 REF
16 NREF
17 TH
18 AGC
19 IF
20 VCC3
21-24 GND
25 NRF
26 RF
27 S
28 VCC4
U2730B-BFS
28 27 26
VCO
1 2 3
46
Function and Operation
Not used
I Control input
Supply voltage
Reference pin of VCO
Tank pin of VCO
Ground
Supply voltage
O Test output of main divider
O Test output of reference divider
O Active filter output
O Three state charge pump output
O Lock indication output (open collector)
I Reference divider input
I Reference divider input (inverted)
Threshold voltage of comperator
I/O Charge pump output of comperator, AGC input for amplifier and mixer
O Intermediate frequency output
Voltage supply
Ground
I RF input (inverted)
I RF input
I Control input
Voltage supply
25 24 23 22
RF COUNTER
TEST INTERFACE
REFERENCE COUNTER THREE STATE
INTERNAL SUPPLY VOLTAGE
FOR THE SYNTHESIZER
CONTROL INTERFACE
4 5 6 7
21 20 19 18
PROG.
PHASE
CHARGE PUMP
DETECTOR
VOLTAGE STABILIZER
8 9 10 11
17 16 15
LOCK
DETECTOR
12 13 14