17
Alignment
1
st
Local Output Level
1. Connect the RF millivoltmeter to
J2002
(pin 11) and
tune the transceiver to 28.000 MHz in the CW mode.
2. Confirm that the RF level is at least +5 dBm (or 400
mVrms).
PLL "Unlock" Display Alert
1. Connect the DC voltmeter to
J2002
(pin 1).
2. Disconnect the 4-pin plug connected to
J5002
(REF-Unit),
and confirm that (A) the voltmeter shows less than 0.5 V
and (B) that "UNLOCK" is displayed on the LCD.
3. Re-connect the 4-pin plug to
J5002
, and confirm that
the voltmeter shows at least 3.5 V and that LCD dis-
play has returned to normal.
PA Unit Adjustment
Before alignment, set the mode to CW and tune the trans-
ceiver to 1.800 MHz. Nothing should be connected to the
CW Key Jack.
Driver Stage Idling Current
1. Remove the jumper connector at
J3005
, and insert an
ammeter in its place.
2. Press the microphone's PTT switch, and adjust
VR3001
for an indication of 20 mA (±2 mA) on the ammeter.
3. Disconnect the ammeter and reinstall the jumper con-
nector at
J3005
4. Remove the jumper connector at
J3006
and insert the
ammeter in its place.
5. Press the PTT switch, and adjust
VR3002
for an indica-
tion of 60 mA (±2 mA) on the ammeter.
6. Disconnect the ammeter and reinstall the jumper con-
nector at
J3006
.
Final Stage Idling Current
1. Connect the ammeter between the "13US" pin on PA
Unit and the "13US" pin of the Final Unit. The "13US"
line is currently connected by a wire; remove it so you
can connect the ammeter.
2. Turn both
VR5401
and
VR5402
fully counterclockwise.
3. Press the PTT switch, and adjust
VR5401
for an indica-
tion of 45 mA (±2 mA) on the ammeter.
4. Press the PTT switch, and adjust
VR5402
for an indica-
tion of 85 mA (±4 mA) on the ammeter.
5. Release the PTT switch. Re-connect the "13US" line be-
tween PA unit and Final Unit.
VR3001
VR3002
VR5402
VR5401
J3006
J3005
Содержание FT-817 -
Страница 5: ...5 Block Diagram...
Страница 6: ...6 Block Diagram Note...
Страница 7: ...7 Interconnection Diagram...
Страница 8: ...8 Interconnection Diagram Note...
Страница 14: ...14 Circuit Description Note...
Страница 24: ...24 Alignment Note...
Страница 26: ...26 MAIN Unit Lot 1 29 Note...
Страница 30: ...30 MAIN Unit Lot 30 31 Note...
Страница 34: ...34 MAIN Unit Lot 32 74 Note...
Страница 38: ...38 MAIN Unit Lot 75 Note...
Страница 62: ...62 Main Unit Note...
Страница 64: ...64 PLL Unit Lot 1 12 b B A Side A C 1 2 3 Side B a c 1 2 3 Parts Layout...
Страница 75: ...75 REF UNIT Lot 1 40 90 mVrms Circuit Diagram...
Страница 76: ...76 REF UNIT Lot 1 40 2SC4400 NA Q5001 5002 Side B Side A Parts Layout...
Страница 77: ...77 REF UNIT Lot 41 90 mVrms Circuit Diagram...
Страница 78: ...78 REF UNIT Lot 41 2SC4400 NA Q5001 5002 Side B Side A Parts Layout...
Страница 80: ...80 REF Unit Note...
Страница 81: ...81 PA Unit Lot 1 14 Circuit Diagram 200 mVp p 850 mVp p 2 2 Vp p 500 mVp p 10 0 Vp p TX 14 0 MHz 5 W...
Страница 82: ...82 FINAL Unit Lot 1 14 Circuit Diagram 20 Vp p 22 Vp p 5 Vp p 5 Vp p TX 14 0 MHz 5 W...
Страница 85: ...85 PA Unit Lot 15 Circuit Diagram 200 mVp p 850 mVp p 2 2 Vp p 500 mVp p 10 0 Vp p TX 14 0 MHz 5 W...
Страница 98: ...98 PA Unit Final Unit Note...
Страница 108: ...108 PANEL Unit Note...