34
TK-880
Ref. No.
Use / Function
Operation / Condition
D27
Power detection
D28
Protection
D30
Power detection
D31
Reverse protection
D32
Surge absorption
B
D34
Protection
DC 20V and over time on
D35
Charge
DEO
D37
Reverse protection
D200
Large input protection
E version
D203~206
BPF tune
E version
D207
Usable temperature
range
D209
ANT swtich
TX time on
D210,211
ANT switch
D212~215
BPF tune
E version
D902,903
BPF tune
E3 version
TX-RX Unit (B/2) : Control Section
Ref. No.
Use / Function
Operation / Condition
IC501
LPF, amplification
LSD
IC502
Amplification
AF, HSD
IC503
Reference voltage/
ASQ
Buffer amp
IC504
Audio processor
Compander, MIC amplifier, ALC,
Modem, AF filter, IDC
IC506
Analog switch
MO, DEO, EMG, MI switch
IC507
DTMF decoder
DTMF detection
IC508
Shift register
LR, LG, KBLC, MM1, T/R, KEY,
BSFT, PA2 output
IC509
Reset
Power on time “L” output
IC510
Flash ROM
IC511
CPU
IC512
EEPROM
IC513
5V AVR
5C (Control unit)
IC710
Buffer amp
HSD
IC711
Buffer amp
MIC
Q501
MIC mute
MM “H” and MM1 “H” time mute on
Q502
AF mute
KEY “H” time mute on
Q503
Noise amp
Ref. No.
Use / Function
Operation / Condition
Q507
Inverter
PA2 H/L switch
Q508
LED switch
LG “H” time on, Busy time green on
Q509
LED switch
LR “H” time on, TX time red on
Q510
Clock switch shift
BSFT “H” time clock shift on
Q511
FSW swtich
FSW “L” time foot switch on
Q512
Key backlight switch
KBLC “H” time on
Q513
Key backlight switch
KBLC “H” time key backlight on
Q515
Keybacklight switch
D501
Surge absorption
BLC
D502
Over current
PSB
protection
D503
Surge absorption
CM
D504
Surge absorption
PTT/TXD
D505
Surge absorption
HOOK/RXD
D507
MIC mute
MM/MM1
D508
Limiter
MIC
D509
Limiter
ASQ
D510
Reverse current
C575 charge
protection
D511
BUSY/TX LED
Busy time green on, TX time red on
D512~517
Key backlight
KBLC “H” time on
D518
Current regulation
Key backlight
D520
Discharge
Reset pulse
VCO Unit
Ref. No.
Use / Function
Operation / Condition
Q101
Oscillator
RX
Q102
Inverter
TX (ST “H”) time on
Q103
Oscillator
TX
Q104
TX/RX switch
TX (ST “H”) time on
Q105
TX/RX switch
Q102 off time on
Q106
Buffer amp
D101
RX VCO
D102
TX VCO
D103
RX VCO
D104
TX VCO
D105
Modulation
DESCRIPTION OF COMPONENTS
Содержание TK-880 series
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