Icom IC-706MKIIG Service Manual page 5

SECTION 2
• MAIN AND FILTER BOARDS
D/A converter
(IC2201: M62352GP)
RX preamplifier
(IC151: PC1658G)
HPF board
1st mixer
(D271: HSB88WSTR)
1st IF filter
(FI511: FI-261)
2nd mixer *
(D551: HSB88WSTR)
2nd IF filter
(FI561: FL-23)
Space for optional filters
⎛FL-100, FL-101, FL-103⎞
⎜ ⎟
⎝FL-233, FL-232
⎠
• PA AND PLL UNITS
Power amplifers
(Q171, Q172, Q231: SRFJ7044)
DDS IC
(IC101: SC-1246)
BFO DDS IC
(IC901: SC-1287)
PLL IC *
(IC461: LMX2306TMX)
VCO1 *
(Q301: 2SK508)
VCO2 *
(Q331: 2SK508)
INSIDE VIEWS
2 - 1
FILTER board
MAIN CPU clock
(X2161: CR-636)
MAIN CPU *
(IC 2001: HD6433337YA56F)
MAIN board
3rd IF filter for FM *
(FI791: SFPC455E-TC01)
MIC amplifier
(IC931: PC5023GS-077-E1)
AF selector switch *
(IC861: BU4052BCFV-E2)
Discriminator
(X791: CDB455CX24)
Balanced modulator *
(IC1041: NJM1496V)
FM IF IC *
(IC791: TA31136FN)
Tx FM PLL IC *
(IC1011: LC7153M-TLM)
PA unit
DRIVER board
Drive amplifers
(Q161, Q211: MRF1508TI)
Predrive amplifier
(Q101: 2SK2854)
Predrive amplifer
(Q121: MXR9745)
AF power amplifer
(IC231: LA4425A)
PLL unit
AF volume controller
(IC201: M5282FP)
VCO3 *
(Q361: 2SK508)
Reference oscillator
(X621: CR-275A 30.00000 MHz)
*Located under side of the point