Kenwood TK-280, Руководство по обслуживанию

Страница: 30 / 62

TK-280
30
SEMICONDUCTOR DATA
PLL System : SA7025DK (TX-RX Unit : IC14)
■
Block diagram
1 CLOCK Serial clock input.
2 DATA Serial data input.
3 STROBE Serial strobe input.
4 Vss Digital ground.
5 RF
IN
Prescaler positive input.
6
RF
IN
Prescaler negative input.
7 Vcc
P
Prescaler positive Supply voltage. This pin supplies
power to the prescaler and RF input buffer.
8 REF
IN
Reference divider input.
9 RA Auxiliary current setting; resistor to V
SSA
.
10 AUX
IN
AuxIliary divider input.
11 PHA Auxiliary phase detector output.
12 V
SSA
analog ground.
13 PHI Integral phase detector output.
14 PHP Proportional phase detector output.
15 V
DDA
Analog supply voltage. This pin supplies power
to the charge pumps, Auxiliary prescaler.
Auxiliary and Reference buffers.
16 RN Main current setting; resistor to V
SSA
.
17 RF Fractional compensation current setting;
resistor to V
SSA
.
18 LOCK Lock detector output.
19 TEST Test pin; connect to V
DD
.
20 V
DD
Digital supply voltage. This pin supplies power
to the CMOS digital part of the device.
Pin No. Symbol Description
■
Pin description
1 NC Not connected.
2 VC1 DC volume control 1.
3 NC Not connected.
4 V
I(1)
Voltage input 1.
5 VP Positive Supply voltage.
6 V
I(2)
Voltage input 2.
7 SGND Signal ground.
8 VC2 DC volume control 2.
9 OUT2+ Positive output 2.
10 PGND2 Power ground 2.
11 NC Not conncted.
12 OUT2- Negative output 2.
13 OUT1- Negative output 1.
14 PGND1 Power ground 1.
15 NC Not connected.
16 OUT1+ Positive output 1.
Audio Power Amplifier : TDA7053AT
(Display Unit : IC300)
■
Block diagram
■
Pin description
Pin No. Symbol Description