Terminal Function - Kenwood TH-D72A Service Manual

TH-D72A/D72E
Ref. No. Use/Function
D219 RF switch
D220 RF switch
D221 RF switch
D222 RF switch
D223 Switch
D225,226 Switch
D227 RF switch
D228 Switch
D351 Current steering
D352 Switch
D432,433 Speed up
D434,435 Frequency control
D436 Speed up
D437 RF switch
D511 Speed up
D513 Speed up
D514,515 Speed up
D516,517 RF switch
D518 RF switch
D519~522 Frequency control
D523,524 Modulator
D525 RF switch
D643 Constant voltage
TX-RX unit (X57-784X-XX) (A/3): Control
Pin No. Pin Name
CN701 (to GPS module, encoder volume)
1 GP_ON
2 33GP
3 RXD_IGPS
4 TXD_IGPS
5 GP_PS
6 AFVI
7 AFVO
8 GND
9 NC
10 GP_BU
11 GND
18
COMPONENTS DESCRIPTION
Operation/Condition/Compatibility
VHF TX
UHF TX
VHF TX
UHF TX
VHF TX
TX protector
VHF TX
VHF TX
AM
AM
Band A PLL
Band A VCO
Ripple fi lter
UHF band A 1st local
DC/DC converter
Ripple fi lter
Band B PLL
Band B PLL
VFO shift
Band B VCO
Band B VCO
VCO shift
Voltage protector

TERMINAL FUNCTION

I/O Function
O Not used
O GPS power supply (3.3V)
I RXD for GPS
O TXD for GPS
O GPS save control
O Audio input to volume
I Audio output from volume
- GND
- Not used
O GPS backup power supply
- GND
Ref. No. Use/Function
Reverse current
D644
protector
D645 Constant voltage
Reverse current
D646
protector
D647 Constant voltage
D648 Voltage shift
D649 Current steering
Reverse current
D650
protector
D701~705 Surge protection
D706 Speed up
D707 Switch
D709 LED
D710~715 LED
D716 Current steering
D717 LED
D718~723 LED
D725,726 Current steering
Reverse current
D727
protector
Reverse current
D729~739
protector
D740 Constant voltage
Reverse current
D741
protector
Pin No. Pin Name I/O
12 ENC1 I Encoder input 1
13 GND - GND
14 ENC2 I Encoder input21
CN703 (to LCD module)
1 /CS O Chip select for LCD
2 /RES O Reset for LCD
3 A[0] O D[0]~D[7] output select
4 /WR O WR for LCD
5 D[0] O Data output
6 D[1] O Data output
7 D[2] O Data output
8 D[3] O Data output
9 D[4] O Data output
Operation/Condition/Compatibility
DC-IN
Voltage protector
Voltage protector
DC/DC converter
SP mute
SP mute
TX/Busy
Back light
VOX
TX/Busy
Back light
VOX
Back up battery
16 key
Lamp B
Function