Inside Views; Pa150W, Filter And Terminal Boards; Main, Pll And Logic Units - Icom IC-M710 Service Manual

SECTION 2

• PA150W, FILTER AND TERMINAL BOARDS

TERMINAL board
Fuse
(F7001)
Drive amplifiers
(Q4001, Q4002: 2SC3133)
Thermal switches
S4001: OHD-3 110M
S4002: OHD-3 50M
Power amplifiers
(Q4003, Q4004: 2SC2904)
PA150W board

• MAIN, PLL AND LOGIC UNITS

RF filter circuit
Noise blanker circuit
2nd mixer circuit
1st IF amplifier
(Q8: 3SK131)
1st IF filter
(FI1: FL-120)
PLL IC
(IC3005: LC7153M)
PLL/-A unit
DDS IC
(IC3001: SC-1246A)

INSIDE VIEWS

2 - 1
REG board
[EUR-21], [EUR-22] only
FILTER board
Power detector circuit
MAIN unit
ALARM board
except [GEN-21]
Squelch circuit
Demodulator circuit
(IC10: NJM1496V)
BFO DDS IC
(IC3002: SC-1287)
Reference oscillator
(X3001: CR-282)
[GEN-21], [GEN-22],
[EUR-21] only
LOGIC unit