Icom IC-A22 - Inside Views; RF Unit Layout; Main Unit Layout; Logic Unit Layout

SECTION 2 INSIDE VIEWS
Rx amplifier
(Q4001: 3SK230)
located under this side
Rx BPF's
VCO board
RF power amplifier
(IC4002: SC-1303)
Reference regulator
(IC5006: S-81250SG)
AF power regulator
(Q5006: 2SB1201)
FM IF IC
(IC5001: TA31136F)
AF selector
(IC5002: TC4W53F)
Buffer amplifier/LPF
(IC5005: TC75W51FU)
Reset IC
(IC6003: S-80745SL)
CPU
Initial matrix
CPU system clock
3.9744 MHz
(X6001: CR-331)
VOR circuit
[IC-A22/E] only
IC6001:
HD404829B96TF except [IC-A3]
HD4074829TF [IC-A3] only
PLL reference oscillator
12.8 MHz
(X4001: CR-456)
PRT unit
AF power amplifier
(IC5003: TA7368P)
2nd IF filter
(FI5001: CFWS455D)
2nd local oscillator
35.345 MHz
(X5001: CR-458)
Discriminator
(X5002: CDBM455C24)
ALC amplifier
(IC5004: BA3308F)
MAIN UNIT (TOP) LOGIC UNIT
RF UNIT MAIN UNIT (BOTTOM)
1st IF filters
FI4001:
FL-221 [IC-A22/E]
FL-203 [IC-A3/E]
2 - 1