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Yaesu FT-991A, Technical Supplement

The Yaesu FT-991A is a versatile and advanced transceiver for amateur radio enthusiasts. This exceptional device boasts a wide range of features and functions, all of which are thoroughly explained in its comprehensive Instruction Manual. Download this manual for free from manualshive.com to unleash the full potential of your FT-991A.

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EDSP-6

REF

DESCRIPTION

VALUE

V/W

TOL.

MFR'S DESIG

YAESU P/N

VERS.

LOT SIDE LAY ADR

EDSP Unit 

Parts List

FT-99

1

 Technical Supplement

R 2590 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2591 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2592 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2593 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2594 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2595 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2596 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2599 

CHIP RES. 

180 

1/16W 

5% 

RMC1/16S 181JTH 

J24189016 

 

1- 

A 

C3

R 2600 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2601 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2602 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B3

R 2603 

CHIP RES. 

2.2k 

1/16W 

5% 

RMC1/16S 222JTH 

J24189029 

 

1- 

A 

B3

R 2606 

CHIP RES. 

2.2k 

1/16W 

5% 

RMC1/16S 222JTH 

J24189029 

 

1- 

A 

B3

R 2609 

CHIP RES. 

2.2k 

1/16W 

5% 

RMC1/16S 222JTH 

J24189029 

 

1- 

A 

B3

R 2610 

CHIP RES. 

2.2k 

1/16W 

5% 

RMC1/16S 222JTH 

J24189029 

 

1- 

A 

B3

R 2613 

CHIP RES. 

2.2k 

1/16W 

5% 

RMC1/16S 222JTH 

J24189029 

 

1- 

A 

B3

R 2614 

CHIP RES. 

2.2k 

1/16W 

5% 

RMC1/16S 222JTH 

J24189029 

 

1- 

A 

B3

R 2615 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B2

R 2616 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

B2

R 2617 

CHIP RES. 

470 

1/16W 

5% 

RMC1/16S 471JTH 

J24189021 

 

1- 

A 

B2

R 2618 

CHIP RES. 

470 

1/16W 

5% 

RMC1/16S 471JTH 

J24189021 

 

1- 

A 

B2

R 2619 

CHIP RES. 

390k 

1/16W 

5% 

RMC1/16S 394JTH 

J24189056 

 

1- 

A 

C1

R 2620 

CHIP RES. 

100k 

1/16W 

5% 

RMC1/16S 104JTH 

J24189049 

 

1- 

A 

C1

R 2621 

CHIP RES. 

1M 

1/16W 

5% 

RMC1/16S 105JTH 

J24189061 

 

1- 

A 

C1

R 2622 

CHIP RES. 

470k 

1/16W 

5% 

RMC1/16S 474JTH 

J24189057 

 

1- 

A 

C1

R 2623 

CHIP RES. 

270k 

1/16W 

5% 

RMC1/16S 274JTH 

J24189054 

 

1- 

A 

C1

R 2624 

CHIP RES. 

470k 

1/16W 

5% 

RMC1/16S 474JTH 

J24189057 

 

1- 

A 

C1

R 2625 

CHIP RES. 

120 

1/16W 

5% 

RMC1/16S 121JTH 

J24189014 

 

1- 

A 

C3

R 2626 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16 000JATP 

J24185000 

 

1- 

A 

A1

R 2627 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16 000JATP 

J24185000 

 

1- 

A 

A3

R 2628 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16 000JATP 

J24185000 

 

1- 

A 

D3

R 2629 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16 000JATP 

J24185000 

 

1- 

A 

D1

R 2630 

CHIP RES. 

10k 

1/16W 

5% 

RMC1/16S 103JTH 

J24189037 

 

1- 

A 

B2

R 2631 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

C2

R 2632 

CHIP RES. 

10k 

1/16W 

5% 

RMC1/16S 103JTH 

J24189037 

 

1- 

A 

C2

R 2633 

CHIP RES. 

33 

1/16W 

5% 

RMC1/16S 330JTH 

J24189007 

 

1- 

A 

C2

R 2634 

CHIP RES. 

10k 

1/16W 

5% 

RMC1/16S 103JTH 

J24189037 

 

1- 

A 

C3

R 2635 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

C3

R 2636 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

C3

R 2637 

CHIP RES. 

10k 

1/16W 

5% 

RMC1/16S 103JTH 

J24189037 

 

1- 

A 

C2

R 2642 

CHIP RES. 

10k 

1/16W 

5% 

RMC1/16S 103JTH 

J24189037 

 

1- 

A 

B3

R 2643 

CHIP RES. 

10k 

1/16W 

5% 

RMC1/16S 103JTH 

J24189037 

 

1- 

A 

B3

R 2644 

CHIP RES. 

10k 

1/16W 

5% 

RMC1/16S 103JTH 

J24189037 

 

1- 

A 

B3

R 2645 

CHIP RES. 

10k 

1/16W 

5% 

RMC1/16S 103JTH 

J24189037 

 

1- 

A 

B3

R 2646 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

B3

R 2647 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

B3

R 2648 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

B3

R 2649 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

B3

R 2650 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

A2

R 2651 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

A1

R 2653 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

D3

R 2655 

CHIP RES. 

0 

1/16W 

5% 

RMC1/16S JPTH 

J24189070 

 

1- 

A 

A1

X 2502 

SPXO 

18.482MHz   

 

DSO221SWAH 18.432MHZ  H0103452 

 

1- 

A 

D3

 SHIELD 

CASE   

  

 

RA0060200 

 

1- 

 

Summary of Contents for FT-991A

Page 1: ...o be correct YAESU assumes no liability for damage that may occur as a result of typographical or other errors that may be present Your cooperation in pointing out any inconsistencies in the technical...

Page 2: ...mateur band Power Consumption Approx Rx no signal 1 8 A Rx signal present 2 2 A Tx 23 A HF 50 MHz 100 W 15 A 144 430 MHz 50 W Supply Voltage DC 13 8 V 15 Negative Ground Dimensions WxHxD 9 0 x 3 2 x 1...

Page 3: ...pecification for frequency ranges not listed Squelch Sensitivity TYP SSB CW AM 1 0 V 1 8 30 MHz 50 54 MHz AMP 2 ON 1 0 V 144 148 MHz 430 450 MHz FM 0 35 V 28 30 MHz 50 54 MHz AMP 2 ON 0 125 V 144 148...

Page 4: ...HEAD SCREW M4X15B 2 Non designated parts are available only as psrt of a designated assembly R7153663 HIMERON RA6024400 PORON SHEET 6x25 M4090229 SP 66S A3627 RA131710A SPONGE RUBBER SP CE RA0994000...

Page 5: ...AT HEAD SCREW M3X5NI 4 Non designated parts are available only as psrt of a designated assembly RA600110A BOTTOM CASE S4000052 CASE LEG FF 004 AR791 R3100700A FOOT R7153663 HIMERON RA1236600 PORON SHE...

Page 6: ...ND HEAD TAPTITE B M2 6X6 2 Non designated parts are available only as psrt of a designated assembly PANEL UNIT RA6004500 RUBBER RING MAIN RA6004200 KNOB MAIN ASSY RA152820A WASHER FELT RA1528400 WASHE...

Page 7: ...NTL UNIT DSP UNIT RA6001000 RUBBER PACKING RA1391800 SPACER DSP RA6000900 SHIELD CASE COVER RA1499500 PORON SHEET 25x35 REF YAESU P N Description Qty U34206001 FLAT HEAD TAPTITE B M2 6X6 6 U24206001 B...

Page 8: ...ption Qty U24206001 BIND HEAD TAPTITE B M2 6X6 26 U24208007 BIND HEAD TAPTITE B M2 6X8B 3 U03310002 SEMS SCREW ASM3X10NI 8 U03306002 PAN HEAD SCREW ASM3X6NI 4 U04333007 SEMS SCREW HSM3X33B 4 U24306001...

Page 9: ...01 BIND HEAD TAPTITE B M2 6X6 9 U24306001 BIND HEAD TAPTITE B M3X6 5 U20205001 BINDING HEAD SCREW M2 6X5 3 S5000414 SPACER QBSB2613E 3 Non designated parts are available only as psrt of a designated a...

Page 10: ...BLOCK DIAGRAM 1 FT 991 Technical Supplement Block Diagram...

Page 11: ...CONNECTION DIAGRAM 1 FT 991 Technical Supplement Connection Diagram...

Page 12: ...Hz Frequency Counter SINAD Meter RF Millivoltmeter Electronic Load Digital DC Voltmeter high Z 1 M Ohm V DC Voltmeter DC Ammeter 23 A Ohmmeter 50 Ohm Dummy Load 100 200 watts In Line Wattmeter 150 300...

Page 13: ...the new setting and exit the alignment mode COMP Meter Adjustment Press and hold in the A B A B and FAST keys while turning the radio on to enter the alignment mode Rotate the MULTI Dial knob to sele...

Page 14: ...rm DC voltmeter RF millivoltmeter 01 05 VCO1 HIGH TXI Adjust L2004 5 1 V 0 1 V At least 3 dBm 01 06 VCO1 LOW Confirm At least 0 3 V At least 3 dBm 01 07 VCO2 HIGH Adjust L2005 5 1 V 0 1 V At least 3 d...

Page 15: ...ully clockwise 3rd Local Level Adjustment Connect the RF millivoltmeter to TP1024 on the MAIN Unit Adjust T1029 on the MAIN Unit for maximum deflection on the RF millivoltmeter 2ndLocal Level Adjustme...

Page 16: ...1 04 REF FREQ Rotate the CLAR VFO B knob so that the frequency counter reading is 60 450000 4 Hz Disconnect the frequency counter from TP1025 Press and hold in the MENU SETUP button for one second to...

Page 17: ...al HFH Press and hold the PTT button then rotate the CLAR VFO B knob so that the RF millivolt meter reading is 10 dBm 1 dBm Release the PTT button Rotate the MULTI Dial knob to select the alignment me...

Page 18: ...Signal Generator to the 144 430 MHz ANT jack then set the output level to 9 dB at the 145 900 MHz with 3 5 kHz devia tion FM modulation of a 1 kHz audio signal Adjust T1025 on the MAIN Unit in succes...

Page 19: ...W USB mode Set the following controls as indicated IPO AMP1 ATT OFF AGC AUTO RF GAIN Fully clockwise Connect the RF Signal Generator to the HF 50 MHz ANT jack then set the output level to 76dB at the...

Page 20: ...evel and adjust the CLAR VFO B knob for the corresponding AF milli voltmeter reading at each frequency Press and hold in the MENU SETUP button for one second to save the new settings and exit the alig...

Page 21: ...ter the alignment mode Rotate the MULTI Dial knob to select the alignment menu item 06 01 R FIL 3k Rotate the CLAR VFO B knob to set the pa rameter is 180 Rotate the MULTI Dial knob to select the alig...

Page 22: ...t the alignment mode Set the FM WIDE mode Set the RF Signal Generator output level to 3 dB at the 145 900 MHz with 3 5 kHz devia tion FM modulation of a 1 kHz audio signal Press and hold in the A B A...

Page 23: ...r to TP6501 on the SCP Unit Adjust T6507 T6506 and T6504 on the SCP Unit in succession several times for maximum deflection on the RF millivoltmeter Set the RF Signal Generator output level to 36 dB a...

Page 24: ...st T1008 T1007 and T1006 for maximum deflection on the RF milli voltmeter Release the PTT button Set the VFO A frequency to 439 900 MHz in the FM mode Press the PTT button adjust TC1004 TC1003 and TC1...

Page 25: ...t then terminate J4501 and J4502 each with a 50 Ohm resistor Disconnect the jumper plugs from J4505 J4506 and J4507 on the V_U PA Unit Disconnect the red cable from J4503 on the V_ U PA Unit Pre Drive...

Page 26: ...it Connect the DC ammeter between J4503 and red cable Press and hold the PTT button while adjust VR4503 so the DC ammeter reading is 800 mA 50 mA Release the PTT button Disconnect the DC ammeter from...

Page 27: ...om J4004 and J4005 on the HF PA Unit Re connect the jumper plugs to J4004 Press and hold the PTT button while adjust VR4001 so the DC ammeter reading is 1 5 A 0 1 A Release the PTT button Disconnect t...

Page 28: ...djust the MIC gain to set the RF Power output to 50 W on the Watt meter Press the PTT button adjust TC4001 for mini mum deflection on the DC voltmeter less than 0 1 V Release the PTT button Connect th...

Page 29: ...knob to select the alignment menu item 10 04 I ALC HFH for the 21 MHz amateur band s ALC Adjustment Set the VFO A frequency to 21 240 MHz in the CW mode Press the PTT button then adjust the CLAR VFO B...

Page 30: ...holding in the PTT button Release the PTT button Rotate the CLAR VFO B knob for maximum deflection on the ALC meter zone S9 10 dB then press the F M LIST key while pressing and holding in the PTT but...

Page 31: ...nob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate...

Page 32: ...FO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob Rotate the CLAR VFO B knob R...

Page 33: ...B knob for 40 W 10 W on the Wattmeter Release the PTT button Connect the 16 6 Ohm Dummy Load and Watt meter to the 144 430 MHz ANT jack Rotate the MULTI Dial knob to select the alignment menu item to...

Page 34: ...006 and J4007 on the HF PA Unit then con nect the DC ammeter 20 A range between J4006 and J4007 Press and hold in the A B A B and FAST keys while turning the radio on to enter the alignment mode Rotat...

Page 35: ...eading 2 0 is broad few points Therefore set the CLAR VFO B knob to the center of this broad range J1006 Release the PTT button Apply a 4 20 0 05 V DC voltage to pin 3 of J1006 and 2 10 0 05 V DC to p...

Page 36: ...FT 991 Technical Supplement MAIN 1 Circuit Diagram MAIN Unit...

Page 37: ...FT 991 Technical Supplement MAIN 2 Parts Layout side A MAIN Unit 1 2 3 4 5 A B C D E F G...

Page 38: ...FT 991 Technical Supplement MAIN 3 Parts Layout side B MAIN Unit 1 2 3 4 5 a b c d e f g...

Page 39: ...188B11H102KA01D K22174821 1 B a3 C 1038 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 A C1 C 1039 CHIP CAP 0 1uF 25V B GRM188B11E104KA01D K22144814 1 B a3 C 1040 CHIP CAP 0 001uF 50V B GRM188B1...

Page 40: ...174823 1 B a4 C 1118 CHIP CAP 120pF 50V CH GRM1882C1H121JA01D K22174237 1 A E1 C 1119 CHIP CAP 0 001uF 50V B GRM188B11H102KA01D K22174821 1 A D1 C 1120 CHIP TA CAP 10uF 16V TMCMA1C106MTRF K78120077 1...

Page 41: ...195 CHIP CAP 0 0056uF 50V B GRM188B11H562KA01D K22174818 1 B a3 C 1196 CHIP CAP 150pF 50V CH GRM1882C1H151JA01D K22174239 1 A E1 C 1197 CHIP CAP 4pF 50V CH GRM1882C1H4R0CA01D K22174205 1 A E1 C 1198 C...

Page 42: ...1D K22144814 1 A D3 C 1278 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 B c2 C 1279 CHIP CAP 0 1uF 25V B GRM188B11E104KA01D K22144814 1 B c2 C 1280 CHIP CAP 1 5pF 50V CK GRM1884C1H1R5CA01D K22...

Page 43: ...23 1 B d3 C 1379 CHIP CAP 33pF 50V CH GRM1882C1H330JA01D K22174223 1 A C2 C 1380 CHIP CAP 470pF 50V CH GRM1882C1H471JA01D K22174249 1 A B2 C 1382 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 A...

Page 44: ...297 1 A A2 C 1467 CHIP CAP 0 0047uF 50V B GRM188B11H472KA01D K22174817 1 A D4 C 1468 CHIP CAP 0 1uF 25V B GRM188B11E104KA01D K22144814 1 A B4 C 1469 CHIP CAP 0 0047uF 50V B GRM188B11H472KA01D K2217481...

Page 45: ...2C1H7R0DA01D K22174208 1 A E3 C 1544 CHIP CAP 0 001uF 50V B GRM188B11H102KA01D K22174821 1 A D4 C 1546 CHIP CAP 0 0027uF 50V B GRM188B11H272KA01D K22174814 1 B f2 C 1547 CHIP CAP 10uF 25V B GRM188R61E...

Page 46: ...HIP CAP 0 1uF 25V B GRM188B11E104KA01D K22144814 1 B f1 C 1626 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 A E4 C 1627 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 A E3 C 1628 CHIP TA...

Page 47: ...B b4 C 1707 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 A B3 C 1708 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 A D4 C 1709 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 B f1...

Page 48: ...785 CHIP CAP 0 022uF 50V B GRM188B11H223KA01D K22174839 1 A A2 C 1786 CHIP CAP 82pF 50V CH GRM1882C1H820JA01D K22174233 1 A D4 C 1787 CHIP CAP 0 1uF 25V B GRM188B11E104KA01D K22144814 1 A E4 C 1788 CH...

Page 49: ...22144814 1 B c2 C 1882 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 B c2 C 1883 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 B c2 C 1884 CHIP CAP 0 1uF 25V B GRM188B11E104KA01D K221448...

Page 50: ...17 6 2B G2070912 1 A B1 D 1035 DIODE RN142S TE61 G2070994 1 A C2 D 1036 DIODE 1SS355 TE 17 G2070470 1 A C2 D 1037 DIODE SMS3927 023LF G2071572 1 A C2 D 1038 DIODE RN731V TE 17 G2070898 1 A C3 D 1039 D...

Page 51: ...90143 1 A F3 FB1003 FERRITE BEADS BLM18BD601SN1D L9190143 1 B a3 FB1004 FERRITE BEADS BLM18BD601SN1D L9190143 1 A F2 FB1005 FERRITE BEADS BLM18BD601SN1D L9190143 1 B a4 FB1006 FERRITE BEADS BLM18BD601...

Page 52: ...1006 CONNECTOR SB20 03WS P0090610 1 A B1 J 1007 CONNECTOR 1210 062 09P AAE P0091571 1 A G3 J 1008 CONNECTOR 30FLT SM2 TB LF SN M P1091142 1 A A3 J 1009 CONNECTOR 30FLT SM2 TB LF SN M P1091142 1 A A4...

Page 53: ...82uH 2 0805CS 821XGLC L1691645 1 A E2 L 1053 M RFC 0 33uH 2 0805CS 331XGLC L1691640 1 A E2 L 1054 M RFC 0 082uH 2 C2012C 82NG RA L1690775 1 A D2 L 1055 CHIP COIL 100uH 5 NLV25T 101J PF L1691779 1 A D...

Page 54: ...FET RTM002P02 TAPE G3070347 1 A F2 Q 1005 TRANSISTOR 2SC4081 T106 R G3340818R 1 B b1 Q 1006 FET BF2040W G4070022 1 A F2 Q 1007 TRANSISTOR 2SC4081 T106 R G3340818R 1 B b1 Q 1008 IC CP2105 F01 GMR G109...

Page 55: ...RANSISTOR DTC114EUA T106 G3070084 1 B f4 Q 1099 TRANSISTOR DTC114EUA T106 G3070084 1 B f4 Q 1100 TRANSISTOR DTC114EUA T106 G3070084 1 B f4 Q 1101 TRANSISTOR DTC114EUA T106 G3070084 1 B f4 Q 1102 IC PE...

Page 56: ...330 1 A E1 R 1012 CHIP RES 68 1 10W 5 RMC1 10T 680J J24205680 1 A F1 R 1013 CHIP RES 4 7 1 16W 5 RMC1 16 4R7JATP J24185479 1 A F1 R 1014 CHIP RES 100k 1 16W 5 RMC1 16 104JATP J24185104 1 A F3 R 1015 C...

Page 57: ...J24185100 1 A F1 R 1086 CHIP RES 100k 1 16W 5 RMC1 16 104JATP J24185104 1 A D1 R 1087 CHIP RES 470 1 16W 5 RMC1 16 471JATP J24185471 1 A F1 R 1088 CHIP RES 1M 1 16W 5 RMC1 16 105JATP J24185105 1 B a4...

Page 58: ...ATP J24185103 1 B b3 R 1164 CHIP RES 220 1 16W 5 RMC1 16 221JATP J24185221 1 A B1 R 1165 CHIP RES 330 1 16W 5 RMC1 16 331JATP J24185331 1 A B2 R 1166 CHIP RES 4 7k 1 16W 5 RMC1 16 472JATP J24185472 1...

Page 59: ...03 1 A C3 R 1260 CHIP RES 100 1 16W 5 RMC1 16 101JATP J24185101 1 B b3 R 1261 CHIP RES 470 1 16W 5 RMC1 16 471JATP J24185471 1 A B2 R 1263 CHIP RES 220 1 16W 5 RMC1 16 221JATP J24185221 1 B d3 R 1264...

Page 60: ...4185103 1 B g3 R 1340 CHIP RES 3 3k 1 16W 5 RMC1 16 332JATP J24185332 1 A B3 R 1341 CHIP RES 10k 1 16W 5 RMC1 16 103JATP J24185103 1 B c3 R 1342 CHIP RES 33k 1 16W 5 RMC1 16 333JATP J24185333 1 A B3 R...

Page 61: ...1 B a3 R 1417 CHIP RES 2 2k 1 16W 5 RMC1 16 222JATP J24185222 1 B e1 R 1418 CHIP RES 10k 1 16W 5 RMC1 16 103JATP J24185103 1 B f2 R 1419 CHIP RES 56k 1 16W 5 RMC1 16 563JATP J24185563 1 B e1 R 1420 C...

Page 62: ...J24185102 1 B b4 R 1495 CHIP RES 1k 1 16W 5 RMC1 16 102JATP J24185102 1 B b4 R 1496 CHIP RES 6 8k 1 16W 5 RMC1 16 682JATP J24185682 1 A C4 R 1497 CHIP RES 2 2k 1 16W 5 RMC1 16 222JATP J24185222 1 A F...

Page 63: ...TP J24185332 1 B b4 R 1574 CHIP RES 100 1 16W 5 RMC1 16 101JATP J24185101 1 A B3 R 1575 CHIP RES 10k 1 16W 5 RMC1 16 103JATP J24185103 1 B b4 R 1576 CHIP RES 10k 1 16W 5 RMC1 16 103JATP J24185103 1 A...

Page 64: ...1 A A2 R 1654 CHIP RES 3 3k 1 16W 5 RMC1 16 332JATP J24185332 1 B a1 R 1655 CHIP RES 10 1 16W 5 RMC1 16 100JATP J24185100 1 A D4 R 1656 CHIP RES 22k 1 16W 1 RMC1 16 223FTP J24183223 1 A A2 R 1657 CHIP...

Page 65: ...21J J24205221 1 B d3 R 1751 CHIP RES 10k 1 16W 5 RMC1 16 103JATP J24185103 1 B b1 R 1752 CHIP RES 220 1 10W 5 RMC1 10T 221J J24205221 1 A F1 R 1753 CHIP RES 47k 1 16W 5 RMC1 16 473JATP J24185473 1 B a...

Page 66: ...1 A D3 T 1024 COIL 05RF M5 N1 R12 T661Y L0022674 1 A A2 T 1025 COIL 05RF 74 62M 010812302 L0022781 1 A F3 T 1026 COIL 05RF M5 N1 R12 T661Y L0022674 1 A F4 T 1027 COIL 05RF M5 N1 R12 T661Y L0022674 1...

Page 67: ...UE V W TOL MFR S DESIG YAESU P N VERS LOT SIDE LAY ADR MAIN Unit Parts List FT 991 Technical Supplement SHIELD CASE 28x15 RA1152200 1 SHIELD CASE COVER 28x15 RA1152300 1 SHIELD PLATE RA6002100 1 SHIEL...

Page 68: ...FT 991 Technical Supplement PLL 1 PLL Unit Circuit Diagram...

Page 69: ...FT 991 Technical Supplement PLL 2 PLL Unit Parts Layout side A side B 1 2 3 A B C...

Page 70: ...pF 50V CK GRM1884C1H1R0BA01D K22174267 1 A C1 C 2041 CHIP CAP 1pF 50V CK GRM1884C1H1R0BA01D K22174267 1 A C2 C 2043 CHIP TA CAP 10uF 16V TMCMA1C106MTRF K78120077 1 A C2 C 2044 CHIP CAP 12pF 50V CH GRM...

Page 71: ...A00 R0 TC H3900537 1 A B2 D 2001 DIODE 1SV325 TPH3 F G2070848 1 A A1 D 2002 DIODE 1SV325 TPH3 F G2070848 1 A B1 D 2003 DIODE 1SV325 TPH3 F G2070848 1 A B1 D 2004 DIODE BAS316 G2070716 1 A A2 D 2005 DI...

Page 72: ...W 5 RMC1 16 152JATP J24185152 1 A C2 R 2022 CHIP RES 680 1 16W 5 RMC1 16 681JATP J24185681 1 A B2 R 2023 CHIP RES 680 1 16W 5 RMC1 16 681JATP J24185681 1 A C1 R 2024 CHIP RES 220 1 16W 5 RMC1 16 221JA...

Page 73: ...FT 991 Technical Supplement EDSP 1 Circuit Diagram EDSP Unit...

Page 74: ...FT 991 Technical Supplement EDSP 2 Parts Layout EDSP Unit side A side B 1 2 3 A B C D 1 2 3 a b c d 4 4...

Page 75: ...O CAP 82uF 16V APXA160ARA820MH70G K48120022 1 A A1 C 2554 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 A A1 C 2555 CHIP TA CAP 10uF 16V TMCMA1C106MTRF K78120077 1 A B3 C 2556 CHIP CAP 0 1uF 10V...

Page 76: ...1uF 10V B GRM155B11A104KA01D K22108802 1 A D3 C 2628 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 A B2 C 2629 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B a1 C 2630 CHIP TA CAP 22uF 1...

Page 77: ...007 1 A A1 R 2541 CHIP RES 33 1 16W 5 RMC1 16S 330JTH J24189007 1 A D2 R 2542 CHIP RES 33 1 16W 5 RMC1 16S 330JTH J24189007 1 A D2 R 2543 CHIP RES 33 1 16W 5 RMC1 16S 330JTH J24189007 1 A D2 R 2545 CH...

Page 78: ...05JTH J24189061 1 A C1 R 2622 CHIP RES 470k 1 16W 5 RMC1 16S 474JTH J24189057 1 A C1 R 2623 CHIP RES 270k 1 16W 5 RMC1 16S 274JTH J24189054 1 A C1 R 2624 CHIP RES 470k 1 16W 5 RMC1 16S 474JTH J2418905...

Page 79: ...FT 991 Technical Supplement CNTL 1 CNTL Unit Circuit Diagram...

Page 80: ...FT 991 Technical Supplement CNTL 2 CNTL Unit Parts Layout side A A B C D E F G 1 2 3 4...

Page 81: ...FT 991 Technical Supplement CNTL 3 CNTL Unit Parts Layout side B a b c d e f g 1 2 3 4...

Page 82: ...88B11H103KA01D K22174823 1 A F1 C 3046 AL ELECTRO CAP 100uF 16V EEE1CA101WP K48120012 1 A F1 C 3047 CHIP TA CAP 0 47uF 25V TMCSA1E474MTRF K78140009 1 A A4 C 3048 CHIP CAP 0 1uF 25V B GRM188B11E104KA01...

Page 83: ...R 12FLT SM2 TB LF SN P1091198 1 A E2 J 3007 CONNECTOR 12FLT SM2 TB LF SN P1091198 1 A F2 J 3008 CONNECTOR IMSA 9639S 45 P1091340 1 A F3 J 3009 CONNECTOR SB20 05WS P0090612 1 A D1 J 3010 CONNECTOR 9637...

Page 84: ...J24189049 1 A B3 R 3042 CHIP RES 4 7k 1 16W 5 RMC1 16S 472JTH J24189033 1 A D1 R 3044 CHIP RES 100k 1 16W 5 RMC1 16S 104JTH J24189049 1 A F3 R 3045 CHIP RES 100k 1 16W 5 RMC1 16S 104JTH J24189049 1 A...

Page 85: ...6S 104JTH J24189049 1 A D1 R 3122 CHIP RES 47k 1 16W 5 RMC1 16S 473JTH J24189045 1 A F3 R 3123 CHIP RES 1k 1 16W 5 RMC1 16S 102JTH J24189025 1 A E3 R 3124 CHIP RES 10k 1 16W 5 RMC1 16S 103JTH J2418903...

Page 86: ...H J24189049 1 B b2 R 3175 CHIP RES 4 7k 1 16W 5 RMC1 16S 472JTH J24189033 1 A D3 R 3176 CHIP RES 0 1 16W 5 RMC1 16S JPTH J24189070 1 A G1 R 3177 CHIP RES 10k 1 16W 5 RMC1 16S 103JTH J24189037 1 A E2 R...

Page 87: ...FT 991 Technical Supplement HF PA 1 HF PA Unit Circuit Diagram...

Page 88: ...FT 991 Technical Supplement HF PA 2 HF PA Unit Parts Layout side A 1 2 3 4 A B D F G E C 5...

Page 89: ...FT 991 Technical Supplement HF PA 3 HF PA Unit Parts Layout side B 1 2 3 4 a b d f g e c 5...

Page 90: ...F 50V B GRM188B11H103KA01D K22174823 1 A F1 C 4069 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 A F3 C 4070 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 B a1 C 4071 CHIP CAP 56pF 250V...

Page 91: ...250V C0G GQM2195C2E4R0CB12D K22240247 1 B c4 C 4178 CHIP CAP 3pF 250V C0G GQM2195C2E3R0CB12D K22240246 1 B e4 C 4180 CHIP CAP 180pF 250V C0G GRM21A5C2E181JW01D K22240316 1 B d4 C 4182 CHIP CAP 120pF...

Page 92: ...V B GRM188B11H222KA01D K22174822 1 B a5 C 4272 CHIP CAP 0 0022uF 50V B GRM188B11H222KA01D K22174822 1 B c5 C 4273 CHIP CAP 0 01uF 50V B GRM188B11H103KA01D K22174823 1 B a4 C 4274 CHIP CAP 0 001uF 50V...

Page 93: ...ERLA230 L0023254 1 A C4 L 4016 TOROIDAL COIL 0 5uH 0 50U T50 6 L0022975 1 A E4 L 4017 TOROIDAL COIL 0 5uH 0 50U T50 6 L0022975 1 A F4 L 4018 TOROIDAL COIL 0 34uH 0 34U T50 6 L0022977 1 A D4 L 4019 TOR...

Page 94: ...RES 3 9 1W 5 RMC1 3R9JTE J24305399 1 B a1 R 4033 CHIP RES 1 5k 1 10W 0 1 RR1220P 152 B J24209078 1 B f2 R 4034 CHIP RES 1k 1 4W 5 RMC1 4 102JATP J24245102 1 A F2 R 4038 CHIP RES 180k 1 10W 0 5 RR1220...

Page 95: ...1 R 4118 CHIP RES 33k 1 16W 1 RMC1 16 333FTP J24183333 1 A A1 R 4119 CHIP RES 27k 1 16W 1 RMC1 16 273FTP J24183273 1 A A1 R 4120 CHIP RES 22 1 2W 5 RMC1 2 220JCTP J24275220 1 R 4121 CHIP RES 22 1 2W 5...

Page 96: ...FT 991 Technical Supplement V_U PA 1 Circuit Diagram V_U PA Unit...

Page 97: ...FT 991 Technical Supplement V_U PA 2 V_U PA Unit Parts Layout side A 1 2 3 A B C D E F G H...

Page 98: ...FT 991 Technical Supplement V_U PA 3 V_U PA Unit Parts Layout side B 1 2 3 a b c f h j d e g i...

Page 99: ...11H102KA01D K22174821 1 A A2 C 4552 CHIP CAP 0 001uF 50V CH GRM1882C1H102JA01D K22174275 1 A C2 C 4553 CHIP CAP 0 1uF 25V B GRM188B11E104KA01D K22144814 1 A A2 C 4554 CHIP CAP 0 001uF 50V CH GRM2162C1...

Page 100: ...31 1 A E2 C 4644 CHIP CAP 33pF 250V C0G GQM2195C2E330GB12D K22240231 1 A E2 C 4645 CHIP CAP 27pF 250V C0G GQM2195C2E270GB12D K22240230 1 A E2 C 4646 CHIP CAP 4pF 250V C0G GQM1875C2E4R0CB12D K22244212...

Page 101: ...CAP 0 001uF 50V B GRM188B11H102KA01D K22174821 1 A H1 C 4738 CHIP CAP 1pF 50V CK GRM1884C1H1R0BA01D K22174267 1 A G2 C 4739 CHIP CAP 0 001uF 50V CH GRM1882C1H102JA01D K22174275 1 B c3 C 4740 CHIP CAP...

Page 102: ...B i2 L 4530 COIL E2 0 4 3 0 9 5T L L0022575 1 A A2 L 4531 COIL E2 0 4 3 0 9 5T L L0022575 1 A A3 L 4532 M RFC 10uH CDRH74 100MC L1690599 1 B i3 L 4533 COIL A1 1 5T3 0D1 2AIW R L0023208 1 A E2 L 4534 C...

Page 103: ...J24185332 1 A C2 R 4542 CHIP RES 47 1 16W 5 RMC1 16 470JATP J24185470 1 B h2 R 4543 CHIP RES 100 1 16W 5 RMC1 16 101JATP J24185101 1 B h1 R 4544 CHIP RES 3 3k 1 16W 5 RMC1 16 332JATP J24185332 1 A C2...

Page 104: ...4185101 1 A G2 R 4612 CHIP RES 4 7k 1 16W 5 RMC1 16 472JATP J24185472 1 B d2 R 4613 CHIP RES 47 1 16W 1 RMC1 16 470FTP J24183470 1 A H1 R 4616 CHIP RES 47k 1 16W 5 RMC1 16 473JATP J24185473 1 B c2 R 4...

Page 105: ...FT 991 Technical Supplement PANEL 1 Circuit Diagram PANEL Unit...

Page 106: ...FT 991 Technical Supplement PANEL 2 Parts Layout PANEL Unit side A side B 1 2 3 a b c d e f g h A B C D E F G H 1 2 3...

Page 107: ...CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B e2 C 5535 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B d2 C 5536 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B d2 C 5537 CHIP CAP 0 1...

Page 108: ...178236 1 B g1 C 5621 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B c1 C 5623 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1 B f1 C 5624 CHIP CAP 0 1uF 10V B GRM155B11A104KA01D K22108802 1...

Page 109: ...511 DIODE BAS316 G2070716 1 B d1 D 5512 LED 19 217 GHC YR1S2 3T G2071438 1 A F1 D 5513 LED 19 217 R6C P1Q2 3T G2071440 1 A F1 D 5514 DIODE BAS316 G2070716 1 B d1 D 5515 DIODE BAS316 G2070716 1 B d1 D...

Page 110: ...S 10k 1 16W 5 RMC1 16S 103JTH J24189037 1 B f2 R 5508 CHIP RES 33 1 16W 5 RMC1 16S 330JTH J24189007 1 B e1 R 5509 CHIP RES 33 1 16W 5 RMC1 16S 330JTH J24189007 1 B e1 R 5510 CHIP RES 33 1 16W 5 RMC1 1...

Page 111: ...R 5583 CHIP RES 150k 1 16W 1 RMC1 16SK154FTH J24189531 1 B c2 R 5584 CHIP RES 150k 1 16W 1 RMC1 16SK154FTH J24189531 1 B c3 R 5585 CHIP RES 4 7k 1 16W 5 RMC1 16S 472JTH J24189033 1 B c1 R 5586 CHIP R...

Page 112: ...1 B f2 RB5502 BLOCK RES MNR14E0ABJ330 J42900036 1 B e1 RB5503 BLOCK RES RAC104D104JCTH J42900055 1 B f2 RB5504 BLOCK RES MNR14E0ABJ330 J42900036 1 B e1 RB5505 BLOCK RES MNR14E0ABJ330 J42900036 1 B e1...

Page 113: ...FT 991 Technical Supplement TUNER 1 TUNER Unit Circuit Diagram...

Page 114: ...FT 991 Technical Supplement TUNER 2 TUNER Unit Parts Layout side A 1 2 3 4 A B C D E F G H...

Page 115: ...FT 991 Technical Supplement TUNER 3 TUNER Unit Parts Layout side B...

Page 116: ...A1X3F120JCDB K00539001 1 A C3 C 6035 CHIP CAP 0 1uF 25V B GRM188B11E104KA01D K22144814 1 A D1 C 6036 CHIP CAP 0 1uF 25V B GRM188B11E104KA01D K22144814 1 A C4 C 6037 CERAMIC CAP 12pF 3 15KV SL DEA1X3F1...

Page 117: ...OR UMD5N TR G3070343 1 A F2 Q 6020 TRANSISTOR UMD5N TR G3070343 1 A F2 Q 6021 TRANSISTOR UMD5N TR G3070343 1 A F2 Q 6022 TRANSISTOR UMD5N TR G3070343 1 A F2 Q 6023 TRANSISTOR UMD5N TR G3070343 1 A F2...

Page 118: ...AY FTR F3AA012E F M1190224 1 A C1 RL6010 RELAY FTR F3AA012E F M1190224 1 A C3 RL6011 RELAY FTR F3AA012E F M1190224 1 A C1 RL6012 RELAY FTR F3AA012E F M1190224 1 A C3 RL6013 RELAY FTR F3AA012E F M11902...

Page 119: ...JACK 1 JACK Unit Circuit Diagram FT 991 Technical Supplement...

Page 120: ...JACK 2 JACK Unit Parts Layout side A side B FT 991 Technical Supplement...

Page 121: ...AP 0 001uF 50V B GRM188B11H102KA01D K22174821 1 A A3 FB7001 FERRITE BEADS BLM18AG601SN1D L9190111 1 FB7002 FERRITE BEADS BLM18AG601SN1D L9190111 1 FB7003 FERRITE BEADS BLM18AG601SN1D L9190111 1 J 7001...

Page 122: ...FT 991 Technical Supplement SCP 1 Circuit Diagram SCP Unit...

Page 123: ...FT 991 Technical Supplement SCP 2 Parts Layout SCP Unit side A side B...

Page 124: ...5 CHIP CAP 0 001uF 50V B GRM188B11H102KA01D K22174821 1 B b2 C 6536 CHIP CAP 0 001uF 50V B GRM188B11H102KA01D K22174821 1 B c1 C 6537 CHIP CAP 22pF 50V CH GRM1552C1H220JA01D K22178220 1 B a1 C 6538 CH...

Page 125: ...1 Q 6517 TRANSISTOR DTC114EUA T106 G3070084 1 B a2 R 6501 CHIP RES 470 1 16W 5 RMC1 16 471JATP J24185471 1 B a3 R 6502 CHIP RES 4 7k 1 16W 5 RMC1 16 472JATP J24185472 1 B a3 R 6503 CHIP RES 220 1 16W...

Page 126: ...R 6549 CHIP RES 47k 1 16W 5 RMC1 16 473JATP J24185473 1 B a1 R 6550 CHIP RES 3 3k 1 16W 5 RMC1 16 332JATP J24185332 1 B a2 R 6551 CHIP RES 120k 1 16W 5 RMC1 16 124JATP J24185124 1 B d3 R 6552 CHIP RES...

Page 127: ...FT 991 Technical Supplement DSP 1 DSP Unit Circuit Diagram...

Page 128: ...FT 991 Technical Supplement DSP 2 DSP Unit Parts Layout side A side B...

Page 129: ...CHIP CAP 0 001uF 50V B UMK105B102KW F K22178829 1 A A1 C 9046 CHIP CAP 0 01uF 25V B GRM155B11E103KA01D K22148834 1 A B1 C 9047 CHIP CAP 220pF 50V CH GRM1552C1H221JA01D K22179713 1 A B1 C 9048 CHIP CA...

Page 130: ...4 CHIP RES 22 1 16W 5 RMC1 16S 220JTH J24189005 1 A B1 R 9065 CHIP RES 3 9k 1 16W 5 RMC1 16S 392JTH J24189032 1 A A1 R 9066 CHIP RES 6 8k 1 16W 5 RMC1 16S 682JTH J24189035 1 A A1 R 9067 CHIP RES 10k 1...

Page 131: ...Copyright 2017 YAESU MUSEN CO LTD All rights reserved No portion of this manual may be reproduced without the permission of YAESU MUSEN CO LTD...

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