Main Unit - Icom IC-E7 Service Manual

SECTION 2
• MAIN UNIT (TOP VIEW)
Reference Reference Reference
frequency oscillator frequency generator frequency generator
(X1: CR-813 7.325 MHz) (X1: CR-813 7.325MHz) (X1: CR-813 7.325MHz)
Reset IC Reset IC Reset IC
(IC2: R3112N291A) (IC2: R3112N291A) (IC2: R3112N291A)
Microphone amplifier
(IC8: LMV324IPW)
• MAIN UNIT (BOTTOM VIEW)
AF power amplifier AF amplifier AF amplifier
(IC9: NJM2070M) (IC9: NJM2070M) (IC9: NJM2070M)
1st mixer 1st mixer 1st mixer
(IC16: µPC2757TB) (IC16: µPC2757TB)
(IC16: PC2757TB)
IF IC IF IC FM IF IC
(IC15: TA31136FNG) (IC15: TA31136FNG) (IC15: TA31136FNG)
AF volume* AF volume AF volume
(IC7: SM6451B) (IC7: SM6451B) (IC7: SM6451B)
INSIDE VIEWS
* Located under the VCO board
CPU CPU CPU
(IC4: M30220FCRP) (IC4: M30220FCRP) (IC4: M30220FCRP)
PTT detector PTT detector PTT detector
(Q14: 2SA1832) (Q14: 2SA1832) (Q14: 2SA1832)
D/A convertor D/A convertor D/A convertor
(IC13: BH2220FVM) (IC13: BH2220FVM) (IC13: BH2220FVM)
CTCSS filter
(IC5: LM2904PWR)
• PA BOARD
Antenna switch circuit Antenna switching circuit Antenna switch circuit
+3V regulator +3V regulator +3V regulator
(IC10: R1111N321B) (IC10: R1111N321B) (IC10: R1111N321B)
PLL IC PLL IC* PLL IC
(IC18: ADF4110BCPZ) (IC18: ADF4110BCPZ) (IC18: ADF4110BCPZ)
VCO board VCO board VCO board
* Located bottom side of the point.
2 - 1
Final amplifier* Power amplifier* Final amplifier*
(Q3: RQA003) (Q3: RQA003) (Q3: RQA003)
Drive amplifier Drive amplifier Drive amplifier
(Q2: 2SC5998) (Q2: 2SC5998) (Q2: 2SC5998)
Pre-drive amplifier Pre drive amplifier Pre drive amplifier
(Q1: 2SC5006) (Q1: 2SC5006) (Q1: 2SC5006)