Icom IC-R20 Service Manual - Page 54
STAVCO board (top), DOWNCONV board (top), A_R3V, C_VCO_OUT, to RF UNIT HJ5, PLLCK, PLLDATA, B R3V
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Page 54 highlights
9-4 1STAVCO BOARD • TOP VIEW 9-5 1STBVCO BOARD • TOP VIEW 9 - 7 9-6 2NDCVCO BOARD • TOP VIEW to RF UNIT HJ5 J1 A_R3V GND APS C_VCO_OUT GND 1 5 to RF UNIT HJ4 J2 OSC GND +3V PLLCK PLLDATA PLLDSTB 6 1 9-7 2NDDVCO BOARD • TOP VIEW to RF UNIT HJ9 J1 B R3V GND BPS D_VCO_OUT GND 1 5 to RF UNIT "HJ8" J2 OSC GND +3V PLLCK PLLDATA PLLDSTB 6 1 The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C. Board. 9-8 DOWNCONV BOARD • TOP VIEW
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The combination of this page and the next page shows
the unit layout in the same configuration as the actual
P.C. Board.
J2
J1
A_R3V
GND
APS
C_VCO_OUT
GND
to RF UNIT HJ5
1
5
OSC
GND
+3V
PLLCK
PLLDATA
PLLDSTB
to RF UNIT HJ4
6
1
J2
J1
B R3V
GND
BPS
D_VCO_OUT
GND
to RF UNIT HJ9
1
5
OSC
GND
+3V
PLLCK
PLLDATA
PLLDSTB
to RF UNIT “HJ8”
6
1
9 - 7
9-4
1STAVCO BOARD
• TOP VIEW
9-5
1STBVCO BOARD
• TOP VIEW
9-6
2NDCVCO BOARD
• TOP VIEW
9-7
2NDDVCO BOARD
• TOP VIEW
9-8
DOWNCONV BOARD
• TOP VIEW