Kenwood TH-F6A Service Manual page 16
Fm transceiver
Hide thumbs
Also See for TH-F6A:
- Service manual (157 pages) ,
- Instruction manual (64 pages) ,
- Quick reference (2 pages)
Table of Contents
Advertisement
TH-F6A/F7E
DESCRIPTION OF COMPONENTS / SEMICONDUCTOR DATA
Ref. No. DESCRIPTION NAME
Q701 VOX AMP
Q702 impedance
Q703 BEAT SHIFT
Q704 AF SP MUTE SW
Q705 RAMP SW
Q706 AF SP MUTE SW Ext speaker
Q707 MIC MUTE SW
Q708 AF SP MUTE SW
Q709 AUDIO AVR SW
Q710 AVR
Q712 VTx SW
Q713 VSSB&VRB SW
Q714 M4S SW
Q715 VRA&VCV SW
Q716 VVOX SW
Q719 Rx AF filter
Q720 RX packet AMP
Q721,722 impedance conversion 9600bps receiving
Q723 TNC cotrol SW
Q725 Audio AVR
Q726 Voltage cotro SW
Q727 LCD DRIVE SW
Q728 AVR SW
Q729 NOISE SHIFT SW
16
Use/function
9600bps transmitter
when VOX mode ON
Microcomputer pin functions
:µPD784216(IC705)
Pin
I/O Pin name Active level
No.
1
I
LDB
L
2
I
LDA
L
3
O
PLF1
H
4
I
CHGI
L
5
O
VRBS
L
6
O
BRXSW1
H
7
O
BRXSW2
H
8
O
BVCOSW
H
9
-
---
---
10
O
---
---
11
I
---
---
12
-
---
---
13
-
---
---
14
-
---
---
15
I
RESET
H
16
I
INT
17
O
LEA
18
O
LEB
---
19
I
EN2
20
I
EN1
21
I
PWR
L
22
I
DCDET
L
23,24 -
---
---
25
I
BATT
---
26
I
SQB
---
27
I
SMA
---
28
I
SMB
---
29
I
REM
---
30
I
VOXIn
---
31
I
TOIn
---
32
I
SQA&THM
---
33
-
---
---
34
O
1750/DTMF
35
O
TONE
36
-
---
---
37
O
SAVE
L
Function
B band PLL lock detect
H:Lock
A band PLL lock detect
H:Lock
PLL filter switch
charging detection
L:Charging
B band receiver power supply
when receiving:L
Prescaler
Prescaler
B band VCO double switch
H:Upper
Positive power supply
System clock
System clock
Ground
Open
Connect to VSS
System reset L:Reset[3.0V]
Power supply voltage drop
detection interrupt
3.5[V]
A band PLL enable
H:Enable
B band PLL enable
H:Enable
Encoder data input
Encoder interrupt
[PWR] Switch interrupt
L:pressed
DC-IN detection
L:DC-IN connect
Connect to VDD
Battery voltage level A/D input
B band noise level A/D input
A band S meter level A/D input
B band S meter level A/D input
Remote control microphone
key A/D input
VOX sensitivity A/D input
TONE detection input pin
A band noise level & temperature-
compensated thermistor voltage
A/D input
Connect to VSS
DTMF tone,1750Hz tone D/A
output
Subtone D/A output
Connect to VDD
Save
L:ON
Hide quick links:
Advertisement
Table of Contents
