Circuit Description - Kenwood KC-Z1 Service Manual

QQ
3 7 63 1515 0
1-2. Pin description
Pin No. Pin Name
1 V3.SW1
2 V2.B
3 V2.A
4 V1.C
5 V1.B
6 V1.A
7 S.DATA
8 S.BUSY
9 VSS
10 X2
11 X1
12 VDD
13 XT2
14 XT1
15 RESET
16 CE
17 R.DATA
18
19 P.LOCK
20 POWER.LED
21 STANDBY.LED
TE
L 13942296513
22 RDS.CK
23 AVDD
24 AVREF0
25 RDS.SL
26 RDS.NL
27 P.SDT
28 P.SCK
29 P.SLE
30 P.LOCK
31 P.HOOK
32 P.OSCEN
33 AVSS
34 P.RXEN
35 P.TXEN
36 AVREF1
37 P.RXD
38 P.TXD
39 P.RF
40 VSS
41 S.DT
www
42 M.DT
43 M.CK
44 M.RQ
.
45 S.RQ
46 PRE2.MUTE
47 MUTE

CIRCUIT DESCRIPTION

I/O
O VCR IC3 (NJU2279D) switch1 port
O VCR IC2 (TC4052BP) B port
O VCR IC2 (TC4052BP) A port
O VCR IC1 (TC4051BP) C port
O VCR IC1 (TC4051BP) B port
O VCR IC1 (TC4051BP) A port
I/O Serial communication data
I/O Serial communication busy
GND
Main system clock (4.15MHz)
I Main system clock (4.15MHz)
Power supply (+5V)
Sub system clock (32.768KHz)
I Sub system clock (32.768KHz)
I System reset
I Chip enable
I/O Repeater data
I Not used
I RF unit lock signal
O Power LED
O Standby LED
I Not used
A/D converter analog power supply (+5V)
A/D converter base voltage (GND)
I Not used
I Not used
O RF unit PLL IC (LMX1511TMX) data
O RF unit PLL IC (LMX1511TMX) clock
O RF unit PLL IC (LMX1511TMX) load enable data
I RF unit lock signal
I LCD controller hook check
O RF unit oscillator enable
VSS (GND)
O RF unit receive enable
O RF unit transmit enable
I D/A converter base voltage VDD (+5V)
I RF unit roam ¸ controller receive data
O RF unit controller
O RF unit RF powe
– GND
I Main & sub U-COM communication sub U-COM transmit data
O Main & sub U-COM communication main U-COM transmit data
x ao
y
O Main & sub U-COM communication main U-COM clock
O Main & sub U-COM communication main U-COM request
i
I Main & sub U-COM communication sub U-COM request
O Preout 2 mute
O Mute (Preout 1 mute)
8
Description
Q Q
3 6 7 1 3
¸ roam transmit data
u163
.
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
H : ACTIVE
H : NONE
H : ACTIVE
L : ACTIVE
L : ACTIVE
H : ACTIVE
m
co
9 9
2 8 9 9
L : HOOK