Icom IC-T70A Service Manual page 35

MAIN UNIT (2/2)
MOD
VCO_MUTE
MUTE
Q307:LDTC144
VCOMOD
5VS PLL3.6V
IC305:
MB15E03
UNLK UNLOCK PLL LOOP
IC FIL
DET
D300:L1SS400
D301:L1SS400
PLL3.6V
PDATA
PCK
15.3MHz
PPS
PSTB
REFMOD FILTER
IC309:TC7S66
Q306:LDTC144
SW
X300:
CR-875
PLLSW
FIN
R5
FI300:LTWC450
BUFF
Q305:2SC4738
IC313:NJM2591
DET
NOISE
FIL_SW
UNLKUNLK
RSSI
NOISE
VVCO5UVCO5
VVCO_SEL
VCO5V
REG
UVCO_SEL
Q300:
PLL3.6V
XP1401
+3.6 RIPPLE
REG
FILTER
IC304: Q302:
S-812C362SC4738
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VVCO5
VVCO5
VHF LO
BUFF
AMP
VCO SW
D304:HSC365 Q314:2SC5231 Q512:2SC5231
D305:HVC365 D311:HSC277 D312:HSC277
D306:HVC365
Q311:2SC5231
SHIFT VCO_SHIFT
D308:HVC277
Q308:LDTC144
UVCO5 UVCO5
UHF
BUFF
VCO
D307:HVC365 Q313:2SC5008
D309:HVC375 VVCO5
D310:HVC350 UVCO5
Q312:2SC5231
LPF BUFF
D302:DAN222
Q310:2SC5108
CERAMIC
BPF
R5
FM MIXIN
DET
D314:HSC277
DISCRI
Q309: X301:
LDTC144 JTBM450
SQLSW
D315:1SV308
W/N SW
Q315
2SC4738
WN
LIMIT
D313:MA3J742 Q318:D317:MA3J742
PS5 UR5 VR5
+5
UR5 VR5
REG CTRL CTRL
Q201: Q317: Q316:
2SA1588 UNR9115 UNR9115
UHFC VHFC R5C
PS5C
R5T5
LO AMP
5V
D318:
DAN222 T5 T5
D500:JDP2S04E
D501:JDP2S04E
Q502:2SC5998
LO LO TX_LO YGR
ATT
AMP
SW
D319:1SV308
APC
CTRL
IC501B:LM2904
BPF3(PSET)
MUTE
Q504:LDTA144
SW
TXMUTE
VR5
R5 VR5
140_LO V_MIX
LO SW ATT LPF
Q500:
BB506C
UR5
R5 UR5
440_LO U_MIX
ATT LPF
LO SW
Q509:
BB506C
R5
46.35MHz
IF XTAL
LIMIT
AMP BPF
FI301:FL-439
2SC4226
R5 T5 BTL5V
Q108:XP1501
R5 T5 +5
Q109:2SB1132
REG REG
REG D106:L1SS400
Q110:LDTC144
Q202: Q200: Q5:2SB1201
2SA1588 2SA1588 Q6:XP1501
T5CI
TTEMP 5VS
TEMP
DET
VCC-I
D524:1SV308
D506:1SV307
Q503:RFM01U7P Q507:RFM12U7X
PWR ANT
DRIVE
HPF
AMP AMP SW
T5
IC500: IC501A
TA75S01 :LM2904
GATE GATE ANT SW
CTRL CTRL CTRL
Q508:XP1115
BPF1(ISET1)BPF2(ISET2) VHFC UHFC
ANT
LPF
SW
D510:1SV308
D511:1SV308
D509:1SV308
136-174 MHz
VR5
D502,D503,D504
:HVC365
RF VHFLPF
BPF BPF
AMP
Q505:BB506C
BPF3 BPF2 BPF1
400-479 MHz
UR5
D512:HVC375
D515,D519:HVC350 D523:HVC350
RF
BPF BPF
AMP
Q511:BB506C
BPF3 BPF2 BPF1
BPF1
CPU5V
DCIN
DCIN
DET
Q107:2SC4738
D104:MAZ8082
D103:L1SS400
Q101:2SB1201
Q102:XP1501 CHG
CTRL.
D102:SB07-03C
D105:DA221
CHGC
5VS CPU5V TXI-V VCC-I
IC102:LM2904
+5 +5 CURRENT
Q103:2SA1832
T5CI
REG REG DETECT. Q104:LDTC144
D107:MAZ8051
D111:L1SS400
IC101:S-812C50
D108:L1SS400
T5C
PCON VCC
9 - 2
Q510:LDTC144
D508:1SV271
D513:1SV271
D525:1SV271
ANT
SW
TX:400.000M~479.000MHz
RX:400.000M~479.000MHz
LPF LPF HPF
D507:MA3J742
D516:MA3J742
PWR
DET
PWR
DET
D514:MA3J742
D517:MA3J742
LPF LPF
TX:136.000M~174.000MHz
RX:136.000M~174.000MHz
VIN
BTVIN
HV
DC
VCC SW
J100:
Q100:TPCF8104
D101:MA2S728
D100:RB050
CHG
+
CPU5V
BATT
BTSENC BTSENC
DET
-
BTDET PROTECT
D109:VC040205