Alignment
ALIGNMENT-3
FT-99
1
Technical Supplement
VCO Adjustment
Connect the Digital DC voltmeter (high-Z) to
TP2002 on the PLL Unit.
Disconnect the coaxial cable from J2001 on the
PLL Unit, then connect the RF millivoltmeter to
pin 13 of J2001.
Press and hold in the [A=B], [A/B], and [FAST]
keys, while turning the radio on, to enter the
alignment mode.
Referring to the table below, select the ap-
propriate “Alignment menu item” using the
[MULTI] Dial knob per the chart right, and
adjust the listed components for the required
voltage, or confirm that the correct voltage is
present on each alignment menu item.
Alignment
Menu Item
Adjust /
Confirm
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 dBm
01-08 VCO2-LOW
Confirm
At least 0.6 V
At least 3 dBm
01-09 VCO3-HIGH
Adjust
L2006
4.1 V ±0.1 V
At least 3 dBm
01-10 VCO3-LOW
Confirm
At least 0.4 V
At least 3 dBm
01-11 VCO4-HIGH
Adjust
TC2001
5.0 V ±0.1 V
At least 3 dBm
01-12 VCO4-LOW
Confirm
At least 0.5 V
At least 3 dBm
01-13 VCO5-HIGH
Adjust
TC2002
5.0 V ±0.1 V
At least 3 dBm
01-14 VCO5-LOW
Confirm
At least 0.8 V
At least 3 dBm
Disconnect the RF millivoltmeter from J2001,
then re-connect the coaxial cable to J2001.
Press and hold in the [MENU(SETUP)] button
for one second to save the new setting and exit
the alignment mode.
TP2002
J2001
TC2001
TC2002
L2006
L2005
L2004
Summary of Contents for FT-991A
Page 10: ...BLOCK DIAGRAM 1 FT 991 Technical Supplement Block Diagram...
Page 11: ...CONNECTION DIAGRAM 1 FT 991 Technical Supplement Connection Diagram...
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 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 73: ...FT 991 Technical Supplement EDSP 1 Circuit Diagram EDSP Unit...
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 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 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 105: ...FT 991 Technical Supplement PANEL 1 Circuit Diagram PANEL Unit...
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 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 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 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...