31
TK-980/981
DESCRIPTION OF COMPONENTS
Ref. No.
Use / Function
Operation / Condition
Q4
DC switch
HOR
Q5
DC switch
IGN
Q6
DC switch
HOR CONT.
Q7
Buffer amplifier
Q8,9
AF mute switch
Q10,11
DC switch
8R
Q12,13
DC switch
8T
Q15
IF amplifier
Q17
APC pre drive
APC
Q18
RX mute
Q19
APC drive
APC
Q20
Current detector SW
TX on
Q21
Pre current detector SW
TX on
Q22
DC switch
TOF
Q25
DC switch
TOF
Q26
DC switch
PSW
Q27
SB switch
Q28
DC switch
SB
Q30,31
DC switch
SB
Q32
AF switch
Q33
DC switch
POR. Q7 SW
Q34
Thermal protection SW
Q201
RF amplifier
Front amplifier
Q202
RF amplifier
Pre drive
Q203
Mixer
Q204
RF amplifier
Drive
Q205
DC switch
POR. Q203 SW
Q300
RF amplifier
PLL input
Q301,302
CP
D1~6
Surge absorption
D7
Voltage reference
D11
DC switch
D16
Reverse current prevention
D17
Surge absorption
D18,19
RF switch
TX/RX
D20
Reverse current prevention
D21
Voltage reference
D24
Current protection
D26
Reverse current prevention
D28
Voltage reference
D31
Reverse current prevention
D32
Surge absorption
D34
Voltage reference
D35
Limiter
D37
Reverse protection
Ref. No.
Use / Function
Operation / Condition
D200
Limiter
Excessive input protection
D208~210
RF switch
TX/RX
TX-RX Unit (X57-6520-XX) (B/2)
-10 : TK-980
-11 : TK-981
Ref. No.
Use / Function
Operation / Condition
IC501~503
Amplifier
IC504
Audio processor
IC506
Analog switch
IC507
DTMF decoder
IC508
Shift/store register
IC509
Reset IC
IC510
Flash ROM
IC511
CPU
IC512
EEPROM
IC513
8V AVR
IC711
Amplifier
Q501
MIC mute
Q502
AF mute
Q503
Amplifier
Noise
Q507
DC switch
PA
Q508,509
DC switch
LED
Q510
Clock shift
Q511
DC switch
FSW
Q512
DC switch
BLC
Q513
AVR
Q515
DC switch
Q513 SW
D501
Surge absorption
D502
Current protection
D503~505
Surge absorption
D507
OR gate
MIC mute
D508,509
Limiter
D510
Reverse current prevention
D511~517
Light emission
D518
Voltage reference
back light
D520
Discharge
Speed up
PLL/VCO (X58-4530-XX)
-10 : TK-980 -11 : TK-981
Ref. No.
Use / Function
Operation / Condition
Q100
Buffer amplifier
Q101
VCO
Q102
Doubler
D100,101
VCO control
D102
VCO modulation