Icom IC-R3 Service Manual page 50

SECTION 11 BLOCK DIAGRAM
IC14:
PC2749TB
RF
LIM HPF
AMP
D909: 1SV308
D1: 1SV252
ATT
D2: 1SV308
D12: 1SV308
D13: 1SV308
0.495–1.9 MHz
LPF LPF
D3: 1SV308 D4: MA2S077 D7: MA2S077
1.9–15 MHz
BPF
D5: MA2S077 D8: MA2S077
15–30 MHz
HPF
D6: MA2S077 D9: MA2S077
LPF
D11: 1SV308
RF UNIT
330–470 MHz
RF
BPF
AMP
D21: 1SV308
Q7: UPA805T
470–600 MHz
D803: MA2S077
RF
LPF
BPF
AMP
D805: 1SV308
D801: 1SV286 Q801: 3SK293
600–800 MHz
RF
BPF
AMP
D853: MA2S077
D851: 1SV286 Q851: 3SK293
225–330 MHz
RF
BPF
AMP
D33: 1SV308
Q9: 2SC5231 C8
800–1150 MHz
RF
BPF
AMP
Q8: 2SC5195
LOGIC UNIT
VCC
+3V POWERC
+3V REG
CONT
IC3: XC62FP3002MR
Q6: 2SA1362 GR
Q39: XP1501 AB
Q303: 2SB1132 R DC-DC
Q304: 2SC4617 Q REG
IC10: X6371A351PR
DC-DC
Q4: 2SA1588 GR
D4: MA729
Q5: XP1501 AB
R3V
R3V
CONT
D3: 1SS372
D5: 1SS372
RIPPLE VP
D15: 1SS372
X6
FIL
D19: 1SS372
D20: 1SS372
Q26: 2SC4081 S
IC13:
PC2758T
D912:
MA2S077
D911: 1SV308
Q3: 2SC4215
RF
AMP
D10: 1SV308
RF-B UNIT
30–65 MHz
RF
BPF BPF
AMP
D403: MA2S077 D404: MA2S077
D401: 1SV288 Q401: 3SK293 D402: 1SV288
65–108 MHz
RF
BPF BPF
AMP
D503: MA2S077 D504: MA2S077
D501: 1SV288 Q501: 3SK293 D502: 1SV288
RFI
108–174 MHz
RF
BPF BPF
AMP
D603: MA2S077 D604: MA2S077
D601: 1SV286 Q601: 3SK293 D602: 1SV286
174–225 MHz
RF
BPF BPF
AMP
D703: MA2S077 D704: MA2S077
D701: 1SV286 Q701: 3SK293 D702: 1SV286
BPF
D24: MA2S077
D22: 1SV286
D37: 1SV308
D23: 1SV286
1stLO
ATT
BPF
D902:
D804: 1SV308
D802: 1SV286 MA2S077
IC1:
PC2757T FI904:
LFSC25N11B0240B
BPF
D854: 1SV308
D852: 1SV286
FM-TV UNIT
D1:
MA2S077
D35: 1SV308
FI1:
LFSC25N12B0426B
BPF
D36: 1SV308
IC1: PC1688
+3 RESET
RESET
IC11:
M38267M8L-256GP
IC5: S-80925ALMP
CPU
BATV BATT CLONE
8 KEY CLSW
CHECK X1: CR-613
4.935 MHz
Q11: UN9214
BP-206
11 - 1
Q864: Q863:
2SC5195 2SC5195
CONLO RF RF
BPF
AMP AMP
CONV VCO
(1291, 1320 or 1351 MHz)
Q874: IC15:
2SC5195 TB31242FN
LO LOOP
PLL IC
AMP
FIL
D64: MA2S077 D63: MA2S077
2ndLO
D121:
D67: MA2S077 D65: MA2S077
MA2S077
x2
D122:
MA2S077
RFO
D68: MA2S077 D66: MA2S077
x2
D75:
MA132WK
FI3:
D71: D73:
FL-319
MA2S077 MA2S077
BPF
D72: D74: Q41: 2SC4215 O
MA2S077 MA2S077
IF
BPF
AMP
FI4:
SFECV13.25MAS
FI901:
D901: TSB2121D
MA2S077
IF
BPF
AMP A/V OUT
IC10:
PC2757T E3 Q857:
FI905:
2SC4403 3
TPSCC4.5MB
IC901:
BPF IF IC
M52342FP
BPF
Q854:
2SC4081 S
IF IC
FI902:
D41: MA2S077
SFSCC4.5MC2
Q41: 2SC4215 O
TRAC
AMP
Q51: 2SC4215 O
D51: 1SV288
IC2: AN8945SB
D52: 1SV288
IF
FM-TV
BUFF AMP
AMP
DET
Q21: 2SC4081 S
IC21: UPC1663GV
IC2: AK93C10A
EEPROM
Q40: DTA144EE
D6: MA2S111 LIGHT
Q38: 2SC4081 S
D7: MA2S111 SWITCH
D8: MA2S111
INITIAL
D9: MA2S111
MATRIX
D10: MA2S111
D11: MA2S111
LIGHT
D13: MA2S111
LED
DS2: CL-200YG
DS3: CL-200YG
*1
1st VCO
Q862:
2SC5195 D913: 1SV305
Q861: 2SC5006 IC4: PC2746T
BUFF
LV3 Q25: 2SC5231 C8
AMP
IC3: PD3140GS
LOOP
FIL
Q870: 2SK880 Y
Q871: 2SC4117 GR
RIPPLE R3V
FIL
Q34: UPA804T
D202: 1SV286
AMP LPF
REF
Q853: 2SC5231 C8 Q33: 2SC4617 S
D201: MA2S111
2nd VCO
(214.05 MHz or 266.15 MHz)
x2
Q121: 2SC4215
FI2:
CFW450E D76:
MA132WK
BPF
Q44: XP6501 AB IC15: TA31056F
Q44: 2SA1588 GR
IC2: TA31136FN Q45: XP6501 AB
D16: MA132WK
AMAF
IF IC AM DET
Q18: DTA144EE
Q30:
D914: MA132WK
XP6501 AB
AMFM
BPF
FMAF
SW
DEFIL
J3
WFIL
BUFF
Q856: 2SC4081 S
X901: CR-679
(NTSC) 3.579545 MHz
(PAL) 4.433619 MHz
VIDEO
AMP BUFF
IC902: M35017
Q855: 2SC4081 S
BUFF OSD
Q903: 2SA1576 S
Q904: 2SC4081 S
VIDEO RF
SELECT AMP
IC22: NJM2246M Q71: 2SC4081 S
*1 : 1ST VCO FREQUENCY LISTS
Displayed frequency (MHz) 1st VCO frequency (MHz)
0.495–249.9950 240.5950–490.0950
250.0000–799.9950 245.0500–520.0475
800.0000–1149.9950 279.9500–454.9475
1150.0000–1176.0000 381.1000–355.1000
1176.0050–1229.9950 384.0950–330.1050
1230.0000–1255.0000 301.1000–276.1000
1255.0050–1286.0000 305.0950–274.1000
1286.0050–1320.9950 305.0950–270.1050
1321.0000–1349.9950 270.1000–299.0950
1350.0000–1384.9950 270.1000–305.0950
1385.0000–1394.9950 334.1000–344.0950
1395.0000–1427.9950 315.1000–348.0950
D62: 1SV286
Q22: 2SC5006
Q23: 2SC5006
SHIFT
BUFF SHIFT
Q21: DTC144EE
D61: MA2S077
LOOP Q31: 2SK880 Y
FIL Q32: 2SC4117 GR
PLL
IC PDAUL, PCK_IS, PSTB
VXO
X1: CR-674
D41: HVU350
VCO UNIT
Q23: 2SB1132 R
Q41: XP1501 AB
AFON
AFREG
IC14: M5222FP
RF VRC
BUFF VR IC
AMP
Q36: 2SC4081 S
AM
D17:
MA2S111
RF AMUTE
MUTE
WN SW
AMP
Q31: Q37:
2SC4081 S 2SJ144 Y
Q17:
2SJ144 Y
WFM
WSW
TCON
TONE
FIL
IC9: NJM2904V
Q8: DTA144EE
RTONE
TFT
TFT 15V
DRIVER LCD
IC901:
DS4: ALP210CXX10
LV4127W
DS5: 3AE4T4KL2008Y
TFT
TFT
BACK LIGHT
LIGHT
DRIVER
IC903: TC7S02FU
Q801: 2SK2493
4.5V
Q802: UMY1N
5V
DC-DC
Q820: 2SB1201 S
12V
Q821: 2SC4081 S
D820: MA2S111
IC801: MB3776APFV
T2: TO-51 Q804: 2SK2493
VCC
T1: TO-47
Displayed frequency (MHz) 1st VCO frequency (MHz)
1428.0000–1515.9950 377.1000–465.0950
1516.0000–1569.9950 436.1000–490.0950
1570.0000–1579.9950 245.0500–250.0475
1580.0000–1739.9950 264.5500–344.5475
1740.0000–1789.9950 330.0500–355.0475
1790.0000–1809.9950 369.5500–379.5475
1810.0000–1849.9950 365.0500–385.0475
1850.0000–2039.9950 399.5500–494.5475
2040.0000–2109.9950 480.0500–515.0475
2110.0000–2204.9950 289.4500–336.9475
2205.0000–2250.9950 322.4500–345.4475
2251.0000–2450.0950 359.9500–459.4975