Kenwood TK-782 Service Manual page 48

DESCRIPTION OF COMPONENTS /
Ref. No. Use / Function
Q402 W/N switch
Q403 W/N switch
D1~6 Protection
D7 HOR protection
D8,9 Protection
D11 OR gate
D12~14 Protection
D15 HT switch
D16 Reverse protection
D17 Protection
D20 Reverse protection
D21 Protection
D22,23 W/N CF change
D24 Over current
protection
D26 Reverse protection
D27 Power detection
D28 Protection
D30 Power detection
D31 Reverse protection
D32 Surge absorption
D34 Protection
D35 Charge
D37 Reverse protection
D40,41 Charge
D206~208 BPF tune
D209,210 Usable temperature
range
D211 ANT swtich
D212 ANT switch
TX-RX Unit (X57-6143-01) (B/2)
: Control Section
Ref. No. Use / Function
IC501 LPF , amplification
IC502 Amplification
IC503 Base voltage/
Buffer amp
IC504 Audio processor
IC506 Analog switch
IC507 DTMF decoder
IC508 Shift register
IC509 Reset
IC510 Flash ROM
Operation / Condition
Wide time off
Wide time on
AF mute
IGN
5V (IGN)
B
DC 20V and over time on
DEO
Ripple filter
TX time on
Operation / Condition
LSD
AF, HSD
ASQ
Compander, MIC amplifier, ALC,
Modem, AF filter, IDC
MO, DEO, EMG, MI switch
DTMF detection
LR, LG, KBLC, MM1, T/R, KEY,
BSFT, PA2 output
Power on time "L" output
TK-782
47