Kenwood TK-782 Service Manual page 49

TK-782
Ref. No. Use / Function
IC511 CPU
IC512 EEPROM
IC513 5V AVR
IC710 Buffer amp
IC711 Buffer amp
Q501 MIC mute
Q502 AF mute
Q503 Noise amp
Q507 Inverter
Q508 LED switch
Q509 LED switch
Q510 Clock switch shift
Q511 FSW swtich
Q512 Key backlight switch
Q513 Key backlight switch
Q515 Key backlight switch
D501 Surge absorption
D502 Over current
protection
D503 Surge absorption
D504 Surge absorption
D505 Surge absorption
D507 OR gate (MIC mute)
D508 Limiter
D509 Limiter
D510 Reverse current
protection
D511 BUSY/TX LED
(Green/Red)
D512~517 Key backlight
D518 Current regulation
D520 Discharge
PLL/VCO Unit (X58-4712-71)
Ref. No. Use / Function
Q101 Inverter
Q102 Oscillator
Q103 Oscillator
Q104 TX/RX switch
Q105 TX/RX switch
Q106 Buffer amp
D101 RX VCO
D102 TX VCO
D104 RX VCO
D107 TX VCO
D109 Modulation
48
DESCRIPTION OF COMPONENTS /
Operation / Condition
5C (Control unit)
HSD
MIC
MM "H" and MM1 "H" time mute on
KEY "H" time mute on
PA2 H/L switch
LG "H" time on, Busy time green on
LR "H" time on, TX time red on
BSFT "H" time clock shift on
FSW "L" time foot switch on
KBLC "H" time on
KBLC "H" time key backlight on
BLC
PSB
CM
PTT/TXD
HOOK/RXD
MM/MM1
MIC
ASQ
C575 charge
Busy time green on, TX time red on
KBLC "H" time on
Key backlight
Reset pulse
Operation / Condition
TX (ST "H") time on
RX
TX
TX (ST "H") time on
Q101 off time on