曝光臺 注意防騙 網曝天貓店富美金盛家居專營店坑蒙拐騙欺詐消費者

equipment.
Page 105
Jul 20/2005
Panasonic Avionics Corporation
COMPONENT MAINTENANCE MANUAL
PART NUMBER RD-AA5002 SERIES
23-32-47
(Cont’d)
ITEM (SOURCE) DESCRIPTION/MINIMUM REQUIREMENTS
Oscilloscope (C/A) DC to 40 MHz, precision of ±3% for 1 Vp-p video signal
measurements.
20-dB RF Attenuator
(C/A)
Type good for VHF applications, 50 W input impedance,
0.5 W or greater. It must give an attenuation of
approximately 20 dB for the VMU tuner.
BNC 50-W Terminator
(C/A)
Three sets are necessary to give termination for three RF
outputs of the VMU. Each must be 0.5 W or more in
rating.
RF Cable (C/A) BNC-BNC 50-W coaxial cable. Three sets are necessary
(RFC1 thru RFC3).
Video Cable (C/A) BNC-BNC coaxial cable. Two sets are necessary (VC1 and
VC2). The cable impedance can be 50 or 75 W.
BNC Tee Adapter (C/A) Two sets are necessary (T1 and T2).
Monitor Cable (C/A) One set is necessary to connect the output (BNC) of the
VMU tuner to the input of the video monitor.
CPU Extension Card,
RD-AM9357-1
(Panasonic)
It connects to the A5 card and gives an extended
connection for the A1 card for fault isolation.
Modulator Extension
Card,
RD-AM9357-2
(Panasonic)
It connects to the A5 card and gives an extended
connection for the A2 card for fault isolation.
Power Extension Card,
RD-AM9357-3
(Panasonic)
It connects to the A5 card and gives an extended
connection for the A4 card for fault isolation.
Volt-Ohm-Milliammeter
(VOM) or Digital
Multimeter (DMM)
(C/A)
Use a VOM or DMM for continuity check and fault
isolation. It must be an "ISOLATED" type, such as a
battery-operated one, for fault isolation on the A4 card.
Ceramic Alignment
Screwdriver or
Flat-Blade
Screwdriver (C/A)
Use this to turn VR201 and VR202 (variable resistors) on
the A2 card and VR501 and VR502 on the A8 card. We
recommend to use a ceramic alignment screwdriver (all
insulating material) to prevent accidental damage to the
A2, A5 and A8 cards.
Page 106
Feb 20/2002
Panasonic Avionics Corporation
COMPONENT MAINTENANCE MANUAL
PART NUMBER RD-AA5002 SERIES
23-32-47
FRONT PANEL
RD-AX8308 VM U TESTER
VIDEO INPUT
RF1
RF OUTPUT
TO VMU
J1 J2 TO CONTROLLER
RS232C I/F
POWER
TX
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10 CH11 CH12 TEST
1
2
3
4 5
6
RF2 RF3 RF4
RF1 RF2 RF3 RF4
RX GND
WARNING LABEL
REAR PANEL
115V AC
400Hz
3A
8 7
RD-AX8308 VMU TESTER
Figure 101 (Sheet 1)
Page 107
Feb 20/2002
Matsushita Avionics Systems Corporation
COMPONENT MAINTENANCE MANUAL
PART NUMBER RD-AA5002 SERIES
23-32-47
FRONT PANEL
ITEM NAME DESCRIPTION
1 POWER switch This switch controls the primary AC power of 115 V, 400 Hz
to the VMU.
2 VIDEO INPUT
connectors,
CH1 thru CH12
and TEST
The baseband composite video signals are applied to the
video inputs of the VMU through these BNC connectors.
3 RF OUTPUT
connectors,
RF1 thru RF4
The RF outputs from the VMU are available at these BNC
connectors. The RF output impedance of the VMU is 50 W.
4 TO VMU
connectors,
RF1 thru RF4,
J1 and J2
The RD-AM9341 test harness is connected to these connectors.
5 RS232C I/F
connector
This connector is connected to the COM1 connector of a
personal computer (PC) with an RS-232C cable of null-modem
type. The PC is necessary to set the picture carrier
frequencies.
6 TX, RX and
GND terminals
These terminals are installed to monitor the serial data
communication between the VMU and a personal computer PC).
The TX terminal gives the VMU's data output to the PC. The
RX terminal gives the PC's transmit data output. The GND
terminal connects to the signal ground line.
REAR PANEL
ITEM NAME DESCRIPTION
7 3-A circuit
breaker
This circuit breaker is for protection of the primary power
line to the VMU.
8 Power
connector
This connector is connected to an AC source of 115 V, 400 Hz
through the power supply cord.
RD-AX8308 VMU TESTER
Figure 101 (Sheet 2)
Page 108
Aug 20/2002
Matsushita Avionics Systems Corporation
COMPONENT MAINTENANCE MANUAL
PART NUMBER RD-AA5002 SERIES
23-32-47
FRONT PANEL
REAR PANEL
RD-AX8308-01 VMU TUNER
Figure 102 (Sheet 1)
Page 109
Aug 20/2002
Matsushita Avionics Systems Corporation
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：COMPONENT MAINTENANCE MANUAL Video Modulator Unit (VMU)(27)