Icom IC-910H service manual TOP View, Bottom View, Pll Ic

2-2 UX-910 (OPTIONAL UNIT)

• TOP VIEW

Power module IC (IC21: M57762-02)

YGR amplifier (IC141: ∝PC1878G)

PLL IC

(IC501: TB31242)

1st LO VCO circuit

DDS IC

(IC661: SC-1246A)

• BOTTOM VIEW

Power supply circuit for AG-1200 (Q71: 2SD1801)

Pre-drive amplifier (Q36: 2SK2354)

2nd IF amplifier (Q81: 2SC2712)

Power supply circuit for AG-1200

Q72: DTC144EU

Q73, Q74: 2SC2712

RF pre-amplifier (Q281: NE34018)

RF amplifier (Q271: 2SC5454)

TX 1st mixer (IC131: ∝PC8163TB)

RX 1st mixer (IC241: ∝PC2721)

TX 1st IF amplifier (IC111: ∝PC2709)

RX 2nd mixer (Q221: 3SK166)

TX 2nd mixer (D82: HSB88WS)

2nd LO VCO circuit

Drive amplifier (Q38: 2SK2855)

Divider

(IC610: TC7W74FU)

Reference amplifier (IC601: TC7SU04F)

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