34
4. Confirm both meters are illuminated.
5. Confirm operation of the Step-Start Relay (Within 1-2 seconds after switching the
amplifier
ON
, the Step-Start Relay should produce a soft “Click” and the meter illu-
mination should noticeably brighten).
6. After approximately 20 Seconds, switch the amplifier “POWER” switch
OFF
.
If the amplifier Step-Start Relay energized properly and the meters illuminated, then bright-
ened after the Step-Start interval, proceed with the following test. Otherwise, unplug the
amplifier from the AC mains and begin troubleshooting.
1. Insert the amplifier keying line into the “RL CONT” jack.
2. Ensure the free-end of the keying line is electrically “Open”.
3. Switch the amplifier
ON
and reconfirm proper Step-Start operation.
4. Confirm that neither
ON AIR
nor
STBY
lights is illuminated.
5. Change the amplifier “LINEAR” switch from
STBY
to
OPERATE
.
Confirm the
STBY
light is now illuminated.
6. Electrically short the “Open” end of the keying line.
Confirm the
STBY
light is extinguished and
ON AIR
light is illuminated.
7. Set the “LINEAR” switch to
STBY
.
Confirm
STBY
and
ON AIR
lights are extinguished.
8. Set the “LINEAR” switch to
OPERATE
, and short the keying line.
Confirm the
STBY
light is extinguished and
ON AIR
light is illuminated.
9. Open the keying line.
Confirm
ON AIR
light extinguished and
STBY
light illuminated.
10. Electrically short the “Open” end of the keying line (again).
Reconfirm the
STBY
light is extinguished and
ON AIR
light is illuminated.
11. With the keying line still shorted, set the “LINEAR” switch to
STBY
.
Confirm
STBY
and
ON AIR
lights are extinguished.
12. Leave the “LINEAR” switch set to
STBY
.
13. Switch the amplifier
OFF
.
www.KesslerEngineeringLLC.com
Summary of Contents for TL-922 Revival (tm)
Page 13: ...6 Figure 3 1 TL 922 Revival tm Upgrade Kit Contents www KesslerEngineeringLLC com...
Page 18: ...11 Figure 3 4 LED Circuit Board Correctly Installed www KesslerEngineeringLLC com...
Page 30: ...23 Figure 3 19 QSK PCB to QRO Output Connections www KesslerEngineeringLLC com...
Page 34: ...27 Figure 3 23 Electronic Bias PCB Installed www KesslerEngineeringLLC com...
Page 47: ...40 Figure 3 30 Step Start PCB www KesslerEngineeringLLC com...
Page 49: ...42 Figure 3 33 LED Schematic Diagram Figure 3 34 LED PCB www KesslerEngineeringLLC com...
Page 50: ...43 Figure 3 35 Electronic Bias Schematic Diagram www KesslerEngineeringLLC com...
Page 51: ...44 Figure 3 36 Electronic Bias PCB www KesslerEngineeringLLC com...
Page 54: ...47 User Notes www KesslerEngineeringLLC com...
Page 55: ...48 5 1 User Notes Continued www KesslerEngineeringLLC com...
Page 56: ...49 5 2 User Notes Continued www KesslerEngineeringLLC com...
Page 57: ...50 5 3 User Notes Continued www KesslerEngineeringLLC com...
