Icom IC-7700 Service Manual page 16

- ADJUSTMENT AND CHECK POINTS -
• PLL UNIT (TOP VIEW)
RX 2nd LO level RX 2nd LO level
• PLL UNIT
adjustment adjustment
(TOP VIEW)
1
R2Lo
L831
J831
Q831
L834 L834
TO RF J1651
C832
D821
T3Lo
L834
J681
R812 C813
R692 L801 L801
Q811
J831 J831
TO RF J501
R690
C691 C811 C812
MP651
R689
L683
C692
R688
R686 R687 C689 R693 C688 C686 C685 C684 R565
C566
R570 R573
L682
C668 C669 C670 C671 C672
R563
R564 R572
C681 L543
C680
C665
R679 R680
Q541
C546 C546
R677 R678
R675 R676
R544
R673 R674
R545
R671 R672
C546
R669 R670
R667 R668 L541
R665 R666 C545
R663 R664
R661 R662
C654 C655 C657 C658
R659 R660
R658 R655
IC652
C660 R657 MP541
C546
9 Q580
J1681
C1689
Q1680
DACK R1691
C1691 R1686
C526
C525
TOMAINJ801 MP1653 R506
MP1651
2nd LO lock voltage adjust 2nd LO lock voltage adjust
L1681
C1682
R503
C1683
R504
C520
C1668 C1661 C504 C506
R1651
C1651
IC1651
C1652
IC1652
MP501
C1670
EP1708
R1707
EP1701
C1711
R1706
EP1702
C1669
EP1703
C1658 EP1704
C1667 C1665 C1664 EP1705
EP1706
EP1707
EP1709
4
TX 2nd LO level TX 2nd LO level
adjustment adjustment
1st LO level adjustment 1st LO level adjustment
J561 J561
L566 L566
J351 J351
T2Lo
TO RF J502
J561
EP22
EP21 1Lo
EP20
C447
R839
L442
C361
C837
8
Q832
J351
L452
C836
TO RF J351
L801
C292
C294 HPL lock voltage adjustment HPL lock voltage adjustment
R272
Q285 Q284
R273 R262 R263
C803
L565 L565
R803
R802 C801
L262
L272
C277 C267
C272 C272 C262 C262
C275 C265
Q270 R271 Q260 R261
C276 C266
C554
6
C593
C272 C262
C552
Q540
R555
C540
(VCO6) (VCO6) (VCO5) (VCO5)
CP3 CP3
C541
L542
R554 C260
L1603 D261
L270 L260
C1612
D270
C1611
L703 L703 Q1601
C1607
R509
C516 C515 CP701 CP701 CP701
C514
C713
R604
R709 R603
L703
R710
C712
IC501
C709
R537
Reference signal level (40MHz) adjustment Reference signal level (40MHz) adjustment IC104
L702
C123
C703
R101 R102 R103
C704
L702 L702
C507
L701
C107
C535
C108
C534
L30
R106 C109
L530 L531 10M C102 C106
C104
C105
J31
C113
TO OSC
J1702
C1751
C1752
C1753
C1754
C1755 7
C1756
C1757 MP101
R357 R357
DIP
R357
R305
R304
R357
C310
L332
D341
D441
C53
C308
C449
Q441 Q341
C286 C284
C290
Q283 Q282 Q281 Q280 IC51
R252 R253 R242 R243 R232 R233 R222 R223
C239 C229
L252 L242 L232 L222
C257 C247 C237 C227
C252 C252 C242 C242 C232 C232 C222 C222
C255 C245 C235 C225
Q250 R251 Q240 R241 Q230 R231 Q220 R221
C256 C246 C236 C226
3
C252 C242 C232 C222
(VCO4) (VCO4) (VCO3) (VCO3) (VCO2) (VCO2) (VCO1) (VCO1)
C250 C240 C241 C230 C220 C221
D231 D221
L250 L240 L230 L220
D250 D240 D230 D220
J601 MP221
CP2
MKR
MP201
5 LV2
TO RF J1001
R210
C219
C201
C208 C203
IC103 R206 C206 R201
EP13
C121
IC201
C212
IC102
R205
L201
D205
C117
R17
R132 R131
C116
R133
R16
C115
L2
C114
R15
R14
R13
C128 LV1
R11
IC2
R10
CP1
EP12
R138
EP11
B6724D
PLL
176x113 t=1.6(2)
To RF voltmeter To RF voltmeter
• OSC UNIT
(TOP VIEW)
J1072 J1072
R1077 R1075 C1072
Q1070
C1077
R1012
Q1011
RL1011
R1064
R
L1062 L1062 L1061 L1061
C1062
R1067
C52
C1064
R1062
R1065
L1061
C6110
C1031 C1066
L1044
C1028
C1050
C1026
L1023
C1025 C1046
Q1042 RL1010
C1027
Q1022
C1043 EP1092
L1022 C1023
C1044 C1091
R1043
L1041
R1028
R1013
R1046
R1026
C1094
R1092
R1022
R1091
R1021
R61 C1021
C1093 R1094
R1020 L1020
R1093
CP2 CP2
HPL lock voltage check HPL lock voltage check
C16
C15
C18
C17
2
4 - 4
From SG From SG
J1071 J1071
J1072
J1071
J2016
J2016
IC10
R1071
Q1013 Q1012
C1063 C1071
R1073
N C1011 C1015 EP1010
X10
R1063
C1014
EP1070
C1070
C1069
EP1069
D1010 R1101
C1019
R1096
R1097
R1102