Table 5-5 Kx 155A Mainboard Voltage Measurements - Honeywell Bendix/King KX 165A Maintenance Manual

BENDIX/KING
TABLE 5.5 KX 155A Mainboard Voltage Measurements
POINT VDC
U10 pin 6 5.0
U34 pin 1 3.0
CR101 cathode 8.2
CR62 anode/ 2.5 to 6 typ
C270
J11 pin 14 0.8 typ
J11 pin 14 3.8 typ
U16 pin 18 2.0 typ
U16 pin 18 0.8 typ
Q29 gate 0.0
Q43 drain 27 typ
J1 pin 13 7.9
J1 pin 13 0.7
Q18 Col 9.3
Q18 Col 0.0
Q25 col 9.2
Q25 col 0.0
Q13 Gate 9.2
Q13 Gate 0.8
U4 pin 1 4.0
U4 pin 6 2.5
CR42 Cathode 28 typ
CR48 Anode -220.0
R219 -185.0
R220 -14.4 typ
R287 5.4
R288 9.4
U36 pin 14 8.6
*Note: Unless otherwise noted, a receiver input signal or transmitter modulation is not required for these
measurements. All voltages are referenced to chassis ground.
Page 5-46
TEST CONDITIONS*
Rx, Normal Operation
Rx, Normal Operation
Rx or Tx, Normal Operation
Tx with normal microphone input
signal
Display bright
Display dim
Display bright
Display dim
Rx, Normal Operation
Audio Amp Power
No Com Input Signal, Volume
knob in (squelched)
Valid Com Input Signal or Volume
knob out (unsquelched)
No Com Input Signal, Volume
knob in (squelched)
Valid Com Input Signal or Volume
knob out (unsquelched)
Rx, Normal Operation
Tx, Normal Operation
IDENT knob In
IDENT knob Out
Rx, Normal Operation
Rx, Normal Operation
Rx, Normal Operation
Rx, Normal Operation
Rx, Normal Operation
Rx, Normal Operation
Rx, Normal Operation
Rx, Normal Operation
Rx, Normal Operation
15610M00.RCD
SHT DESCRIPTION
1 5 V Reference
1 Temperature
3 Mic Compressor Supply
Voltage
3 Mic Compressor Control
Voltage
4 Photocell voltage
4 Photocell voltage
4 Display intensity
4 Display intensity
6 Power-up mute
6 Audio Amp power
7 Squelch Input
7 Squelch Input
8 Squelch gate drive
8 Squelch gate drive
8 Tx Sidetone Mute drive
8 Tx Sidetone Mute drive
10 IDENT Filter Switch
10 IDENT Filter Switch
10 4 V Reference
10 2.5 V Reference
11 Aircraft Power
11 Unregulated Display Volt-
age
11 Regulated display Voltage
11 -12V line
11 5V Line
11 9V Line
11 PS Switching IC Power
Rev 0, Jun/2000
KX 165A