Icom IC-7800

SQL gate
(Q100,Q101: 2SJ144)
AF power amplifier
(IC140: LA4485)
VCA
(IC105,IC180: NJM2172V)
Head phone amplifier
(IC182: TPA6111A2DGN)
Limit amplifier
(IC230: µPC4570G2)
RF amplifier
(IC820: µPC4094G2)
YGR amplifier
(Q801: 2SC5551)
ALC/APC circuit
(IC60: NJM2058M)
IF amplifier
(Q506: 2SK882)
IF amplifier
Q501: 3SK294
Q504: 2SK882
AF selection circuit
(IC100,IC101: TC4W53F)
ACC AF output circuit
MIC amplifier
(IC821: NJM2172V)
2nd mixer
(D505: HSB88WS)
1st mixer
(D506: HSB88WS)
RF amplifier
(Q508: 2SC5501)
3rd mixer
(IC503: TA4107F)
IF input switch
(IC490: TC4W53F)
SQL gate
(Q100, Q101: 2SJ144)
AF power amplifier
(IC140: LA4485)
VCA
(IC105, IC180: NJM2172V)
Head phone amplifier
(IC182: TPA6111A2DGN)
Limit amplifier
(IC230: µPC4570G2)
RF amplifier
(IC820: µPC4094G2)
YGR amplifier
(Q801: 2SC5551)
ALC/APC circuit*
(IC60: NJM2058M)
IF amplifier*
(Q506: 2SK882)
IF amplifiers*
Q501: 3SK294
Q504: 2SK882
AF selection circuit
(IC100, IC101: TC4W53F)
ACC AF output circuit
MIC amplifier
(IC821: NJM2172V)
2nd mixer
(D505: HSB88WS)
1st mixer
(D506: HSB88WS)
RF amplifier
(Q508: 2SC5501)
3rd mixer
(IC503: TA4107F)
IF input switch*
(IC490: TC4W53F)
*Located under side of the point
2-5 MAIN UNIT
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