Japan Radio Co. JRV-500B Maintenance Manual Download Page 46

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7 - 3

TX CIRCUIT (CMB-257)

Item

Tuning
control

Check

terminal

Value

Measurement

equipment

Remarks

Transmitting level

VR4

J602

26dBm

Power meter

Transmit

POWER AMPLIFIER (CAH-559)

Item

Tuning
control

Check

terminal

Value

Measurement

equipment

Remarks

Alarm level

RV3

TX ANT

25W

Dummy load

Tune the RV3 fully clockwise.
Transmit.
Decrease the RF output to 25W using RV1.
Tune the RV3 counter-clockwise slowly till
disappear the LP alarm.
Increase the RF output to 50W using RV1.

Output span

RV2

TX ANT

60W

Dummy load

Tune

the

RV1

clockwise

and

RV2

counter-clockwise.
Transmit.
Increase the RF output to 60W using RV2.

Output

RV1

TX ANT

50W

Dummy Load

Decrease the RF output to 50W using RV1.

Reduced output

RV4

TX ANT

10W

Dummy Load

Press the 'POWER REDUCE' to reduce the
output power.
Transmit.
Adjust the RF output to 10W using RV4.

Summary of Contents for JRV-500B

Page 1: ...MAINTENANCE MANUAL FOR JRV 500B VHF TRANSCEIVER j Approved Checked Designed Drawing No DC15 JRV 500B...

Page 2: ...t is powered at 100V AC or 220V AC as switched or at 13 6V DC To apply any voltage other than these it is necessary to provide a converter 6 With the dc power applied do not mistake positive and negat...

Page 3: ...5 2 3 Page 2 for internal data 5 2 5 2 4 Procedure for setting initial data on page1 5 3 5 2 4 1 Setting for memory channel data in memory channel mode 5 3 5 2 4 2 Setting for the configuration data...

Page 4: ...it 8 3 8 2 3 Limiter and Sensor Circuit 8 3 8 2 4 Squelch Circuit CMA 705 8 3 8 3 Operation Panel CMD 745 8 4 8 4 Control CDE 885 8 4 8 4 1 Audio Amplifier Circuit 8 4 8 4 2 Control Circuit 8 4 8 5 MO...

Page 5: ...500BDS VHF Transceiver 10 22 JRV 500BPS 2 VHF Transceiver 10 23 CDE 885 Control 10 24 CMA 705 RX Circuit 10 27 CMB 257 TX Circuit 10 28 CAH 559 Power Amplifier 10 29 CMD 745 Operation panel 10 30 CNM...

Page 6: ...which hitherto have been needed for each channel The maritime mobile service radio communication channels are saved in EEPROM The operator can call up any desired channel on the spot Features 1 The JR...

Page 7: ...in filter Duplex type Simplex type S Simplex type Blank Duplex type Built in modem M With built in 4wire modem Blank Without built in 4wire modem Type of mounting P Rack mount type D Desk top type Not...

Page 8: ...Components The following components are optionally available No Components Model Remarks 1 Microphone 6UMED00024 6UMED00025 Stand microphone Headset 2 PC module 1 MODEM CNM 162BA for 4wire remote cont...

Page 9: ...20D 2E 10 Spare parts JRV 500B SP Spare parts for maintenance 11 Spare PC module 1 CONTROL 2 OPERATION PANEL 3 RX CIRCUIT 4 TX CIRCUIT 5 POWER AMPLIFIER CDE 885 CMD 745 CMA 705 CMB 257 CAH 559 12 Mea...

Page 10: ...squelch on off Supervising items Remote Local indication Alarm squelch on indication b Serial interface RS 422 remote control model stop 1 data 8 parity odd baud rate 200 1200 Items of control Channe...

Page 11: ...requency synthesizer 3 Frequency tolerance 5x10 6 or less 4 Necessary bandwidth 16kHz or less 5 Frequency deviation Within 5kHz 6 Spurious characteristic 75dB or less from carrier 7 Microphone input l...

Page 12: ...Refer to Note 2 7 Intermodulation Characteristic 75dB or more Refer to Note 2 8 Signal to noise ratio 45dB or more at antenna input of 100 V Refer to Note 1 and Note 2 9 Distortion factor 5 or less at...

Page 13: ...not place containers holding water or other liquids above or on top of the unit Do not place any objects within 5cm of rear heat sink of the unit 4 2 Power Supply Put the power supply voltage selector...

Page 14: ...er J101 HS21R 2 2 I Plus input 1 I AC power input or Plus input in 24V DC 48V DC type 2 Ground or Minus input in 24V DC 48V DC type AC power J102 HS16R 3 3 I AC power input or Ground in 24V DC 48V DC...

Page 15: ...10 O 13 6V Rx ant filter select J104 SC 1612 STA 11 12 No connection 1 O Transmit PTT 2 O Duplex 3 Ground 4 O DC 13 6V Duplexer J105 SC 1608 STA 5 6 7 8 No connection 1 I Memory ch1 select 2 I Memory...

Page 16: ...No connection 21 O Local response 22 O Receive response 23 O PTT response 24 O Alarm response 25 O Power on response 26 Ground 27 28 No connection 29 I PTT control remote 30 I Power on control remote...

Page 17: ...3 54 O Line output 200bps voice cont 1200bps control 55 56 I Ext input 200bps N C 1200bps voice 57 58 O Ext output 200bps N C 1200bps voice 59 Ground Remote control J106 S 1660A STA 60 No connection R...

Page 18: ...onnector Applicable cable Remarks J101 HS21R 2 HS21P 2 VCTF2x 50 0 18 DC power J102 HS16R 3 HS16P 3 VCTF2x 50 0 18 AC power J103 FM214 8S FM 14 8P for mic P 1612BA P 1612 CBA 10 J104 SC 1612 STA PW 16...

Page 19: ...CA 20 SWVP 0 5 60C Remote control J108 P 2240 P PJ 2240 P HC2L1 or HC2L2 Record out J109 LGR4517 PJ 055B MVVS 20 0 18 6 5P 8 Phones N P 5 5D 2V or 5D 2E N P 8 8D 2V or 8D 2E N P 10 10D 2V or 10D 2E R...

Page 20: ...J Rx ANT Rx ANT DUPLEXER Tx ANT Tx ANT ANT AW 158YB DUPLEXER E DC DUP PTT N P 8 COAXIAL CONNECTOR COAXIAL CONNECTOR COAXIAL CONNECTOR COAXIAL CONNECTOR COAXIAL CONNECTOR COAXIAL CONNECTOR N P 8 N P 8...

Page 21: ...ements of antenna on the same perpendicular line with a spacing of at least 5 meters provided between them Fig 2 If it becomes unavoidable to install the two antenna elements at the positions aslant t...

Page 22: ...o exert no interference to receiver unit Example Both the transmitter and receiver units are operable when H and D expressed by mark o in the graph are 9 and 3 meters respectively When H and D become...

Page 23: ...switching Put the power supply voltage selector switch to the required position and tighten the screw securely If you are going to use AC power please get ready a stable power supply facility capable...

Page 24: ...Setting for Rx antenna filter control data f Setting for remote or local mode as default data g Setting for full duplex or semi duplex in duplex channel h Setting for full remote or semi remote in re...

Page 25: ...ng for memory channel data number 1 1 select the channel number defied on Radio 6 16 Regulation example ch16 _ _ channel number data is memorized and required the memory channel number data 0 0 memory...

Page 26: ...88 1 tr t or tr entering the setting for the configuration data Present data is displayed on the LED tr transceiver t transmitter r receiver 1 2 or 3 tr t or r select the actual configuration of the...

Page 27: ...play remarks 88 2 0 or 1 Present data is displayed on the LED Select the operating mode switch 0 memory channel mode switch 1 direct channel mode 0 or 1 0 or 1 select the actual configuration of the r...

Page 28: ...marine VHF channel number _ _ save the private channel number 1 1 Entering the setting the transmitting frequency data 6 digits The frequency range is 156025kHz to 162000kHz This transmitting frequenc...

Page 29: ...a 1 or 2 d or S select the duplex or simplex operation 0 Duplex operation 1 Simplex operation 89 save and exit this setting for saving data to EEPROM or 88 exit this setting for not saving data to EEP...

Page 30: ...1 operate as follows Operation Display remarks 88 4 _ _ Entering the setting for memory channel number data 1 1 Ch16 is set as channel number for example 6 16 _ save the channel number 0 1 or 7 0 1 o...

Page 31: ...ry backup will not function properly In that case you must select local or remote mode so that the unit may be started up in suitable mode After operating in Paragraph 5 2 1 as page 1 operate as follo...

Page 32: ...splay remarks 88 6 d or S Entering the setting for duplex operating mode or semi duplex operating mode The existing mode will be displayed on LED 0 or 1 d or S select the duplex operating mode or semi...

Page 33: ...in Paragraph 5 2 1 as page 1 operate as follows Operation Display remarks 88 7 F or S Entering the setting for full remote or semi remote in remote mode The existing mode will be displayed on LED 0 o...

Page 34: ...ragraph 5 2 1 as page 1 operate as follows Operation Display remarks 88 8 88 Entering the testing the serial control line 0 H Set the serial control line H or the signal from modem 3320Hz 30Hz as data...

Page 35: ...nitial data on page 2 5 2 5 1 Setting for each channel using or not using in direct channel mode After operating in Paragraph 5 2 1 as page 2 operate as follows Operation Display remarks 88 0 _ _ Ente...

Page 36: ...n 10 second each S2 2 Disable local test mode Enable local test mode S2 5 No wait Power ON 10 second wait Power ON S2 6 Un repetitive reverse transmit collating check Repetitive reverse transmit colla...

Page 37: ...te channel 3 ITU RR channel direct channel mode Yes Yes Yes Yes Yes Yes 2 PTT ON or OFF Yes Yes 3 Power supply ON or OFF Yes Yes 4 Squelch ON or OFF Yes Yes 5 Remote Local selection Yes 6 Receiving si...

Page 38: ...atedly 6 2 2 Transmission format memory channel mode Details of a 4 byte control or a 4 byte monitor item are as follows 1 First byte Table 6 2 First byte Higher bits Lower bits Bit 7 Bit 6 Bit 5 Bit...

Page 39: ...al LOW POWER 0 No alarm signal 1 Alarm signal 3 Third byte Memory channel data Table 6 4 Third byte Higher bits Lower bits Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 1 0 4 2 1 The bits have the f...

Page 40: ...channel Bit 2 Channel number data lower bit 4 numbers Bit 1 Channel number data lower bit 2 Bit 0 Channel number data lower bit 1 Table 6 7 ITU and private channel data Higher bits 0 1 2 3 0 16 60 76...

Page 41: ...e Bit 6 0 The bit indicates the first byte Bit 5 Not used Bit 4 Presence or absence of receiving signal 0 No receiving signal 1 receiving signal Bit 3 Classification of remote control or local control...

Page 42: ...ol 1 Remote control Bit 2 PTT Press to talk control 0 Reception 1 Transmission Bit 1 Squelch control 0 Squelch OFF 1 Squelch ON Bit 0 Power supply control 0 Power OFF 1 Power ON 3 Third byte Memory ch...

Page 43: ...channel Bit 2 Channel number data lower bit 4 numbers Bit 1 Channel number data lower bit 2 Bit 0 Channel number data lower bit 1 Table 6 13 ITU and private channel data Higher bits 0 1 2 3 0 16 60 76...

Page 44: ...ence for analog circuit TP1 13 5 2 transmitting Power supply for TX circuit IC11 28 5 0 5 Power supply for digital circuit F3 13 5 2 Power supply for Control circuit TP2 13 5 2 non transmitting Power...

Page 45: ...0kHz deviation External AF signal output level RV7 External AF output terminal 10dBm Level meter With 40uVemf RF signal modulation 1kHz signal 3 0kHz deviation Record output level RV3 Record terminal...

Page 46: ...ise Transmit Decrease the RF output to 25W using RV1 Tune the RV3 counter clockwise slowly till disappear the LP alarm Increase the RF output to 50W using RV1 Output span RV2 TX ANT 60W Dummy load Tun...

Page 47: ...Check if the voltage teminal 9 8 of PS1 is specified AC voltage AC85 132V or 170 264V CAUTION The terminals High Voltage 1 Check the AC powervoltage at the teminal connector for the power cable AC85 1...

Page 48: ...ce CMA 705 Rx PC board Is the RECEIVE lamp turned on Replace CDE 885 Control PC board Is there demodulated signal at IC5 7 of CMA 705 Set the output of SG Level 10dBu Frequency Rxf Modulation freq 1kH...

Page 49: ...he control functions channel indication changing the channe well Replace CDE 885 Control PC board Is transmitting power normal Replace CMB 257 Tx PC board end Is the RF signal modulated Is there the m...

Page 50: ...Bm 8 1 2 Lock Sensor CMB 257 The purpose of the lock sensor is to inhibit transmission when the transmitting PLL circuit is unlocked This prevents transmission of an undesirable frequency Pin 8 of IC6...

Page 51: ...e the operating point of the output control circuit Also provided is a circuit that protects the transistor at the last stage when its temperature becomes abnormally high As the temperature of the las...

Page 52: ...t CMA 705 The squelch circuit is controlled by the amount of noise present in the detector output When no signal or a weak signal is received there is a large amount of noise present conversely when a...

Page 53: ...selected by IC42 1 The level of selected voice signal is adjusted according to whether it is simplex or duplex and sent to the transmitter section PLL circuit In reception the level of voice signal de...

Page 54: ...s a program that controls the microprocessor IC1 EEPROM IC9 stores memory channel data and configuration data RAM IC10 temporarily stores individual data I O ports IC25 IC26 and IC27 monitor various s...

Page 55: ...omprising many resistors such as IC3 to IC6 four circuits in total IC3 and IC4 are transmitting filter circuits and IC5 and IC6 are receiving filter circuits The RS 422 is used for data transfer with...

Page 56: ...9 1 9 Mechanical drawing JRV 500BP VHF Transceiver 9 2 JRV 500BD VHF Transceiver 9 5...

Page 57: ...diagram 10 10 JRV 500BDS VHF Transceiver Block diagram 10 11 JRV 500BDS 2 VHF Transceiver Block diagram 10 12 JRV 500BP VHF Transceiver 10 13 JRV 500BPM VHF Transceiver 10 14 JRV 500BPF VHF Transceive...

Page 58: ...1 1 11 Parts List JRV 500B VHF Transceiver 11 2 CDE 885 Control 11 4 CMA 705 RX Circuit 11 15 CMB 257 TX Circuit 11 21 CAH 559 Power Amplifier 11 25 CMD 745 Operation panel 11 29 CNM 162BA MODEM 11 32...

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