TK-90
88
Adjustment Points /
■
TX-RX UNIT (Component side view)
===quJou
=E
!"
F
■
FINAL UNIT (Component side view)
===cfk^i
=E
!"
F
W1
(ANT)
14S
TH1
TH2
VSF
VSR
TPR
VR2
TC1
CN1
(RX)
VR4
(RED)
(BLK)
VR1
VR3
CN2
(DRV)
WHITE
YELLOW
L451
L452
PGC
5A
BRC
VR251
VR252
VR852
L326
L327
TC702
TC703
W702
LO2
VR362
CN1
RAT
CN5
W701
LO1
TONE
BEEP
BRD
LO1
FRQ
DET
VR851
W701
LO1
L729
NBL
L731
LO2
W702
LO2
AGC
IFGC
CAR
REF
TP2
TP1
TP4
RXB
TXB
8A
14S
DRV
CN2
TP3
L120
VR361
AMB
TGC
L181
L123 L124
L122
CN4
J1
EXT. SP
G
5D
RXD1
TXI
RXI
INDI
C8
C4
C2
C1
RXO
SCR
PTT
V+
G
TXO
8D
AI
AI
AO
AO
CV
NB
14V
ADJUSTMENT /
L120, L181: RX MCF
L122~L124: TX MCF (73.095MHz)
L326, L327: NB gain /
k_
L729, L731: LO2 level /
ilO
L451, L452: RF IF gain /
oc
!
TC702: Lock voltage (VCO2) /
!
=Es`lOF
TC703: Lock voltage (VCO1) /
!
=Es`lNF
VR251 (USB), VR252 (LSB): Carrier suppresion
!
VR361, VR362: Current protection pre-adjust
!"#$
VR362: Over-current protection (Final)
!
=E
F
VR361: Over-current protection (Drive)
!
=E
F
VR851: Selcall /
VR1~VR4: Final idling current /
!"#
TC1: Null point adjustment /
!