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3-2

WRT-822B

3-2. Adjustments

This section describes the following adjustments and checks
required to satisfy specifications.

Adjustment and Check Items

3-2-1. Power Supply Voltage Check
3-2-2. Carrier Frequency Adjustment

3-2-3. RF Power Output Adjustment
3-2-4. Reference Frequency Deviation Adjustment

3-2-5. Maximum Frequency Deviation Adjustment
3-2-6. Distortion Ratio Check

3-2-7. S/N Check
3-2-8. Frequency Characteristics Check

3-2-9. Tone Signal Adjustment
3-2-10. Battery Alarm Signal Check

3-2-11. Spurious Emissions Check

Preparation

When adjustments are performed, remove the MB-940

board (with battery terminal and Mic input connector)
from WRT-822B unit.

Refer to the “Section 2. Service Overview” for removal.

Connect the MM-SMA (J) connector (J-6402-480-A)

with SMA-BNC (J) connector (J-6402-490-A) to the an-
tenna connector (CN301) on the MB-940 board as

shown below.

Connecting the DC power supply.

Supply the DC power to the battery terminal springs as
shown below.

Check

After the DC power supply connection is completed, set
the power switch (S500) to ON, and check the level on

DC ammeter.
DC ammeter indication level: 140 to 180 mA

CN301

MB-940 Board

(A side)

MM-SMA (J) connector

SMA-BNC (J) connector

MB-940 Board

(B side)

DC power supply

DC ammeter

DC output voltage :

3.0

0.1 V

Red

Black

Battery terminal

Содержание WRT-822B

Страница 1: ...UHF SYNTHESIZED TRANSMITTER WRT 822B SERVICE MANUAL 1st Edition ...

Страница 2: ...rden Um die Gefahr eines elektrischen Schlages Feuergefahr und Verletzungen zu vermeiden sind bei Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen Andere als die angegeben Wartungsarbeiten dürfen nur von Personen ausgeführt werden die eine spezielle Befähigung dazu besitzen AVERTISSEMENT Ce manual est destiné uniquement aux personnes compétentes en charge de l entretien Afin de réd...

Страница 3: ...ent 3 4 3 2 3 RF Power Output Adjustment 3 5 3 2 4 Reference Frequency Deviation Adjustment 3 5 3 2 5 Maximum Frequency Deviation Adjustment 3 6 3 2 6 Distortion Ratio Check 3 7 3 2 7 S N Check 3 8 3 2 8 Frequency Characteristics Check 3 9 3 2 9 Tone Signal Adjustment 3 10 3 2 10 Battery Alarm Signal Check 3 11 3 2 11 Spurious Emissions Check 3 13 4 Spare Parts 4 1 Notes on Repair Parts 4 1 4 2 Ex...

Страница 4: ...2 WRT 822B 7 Board Layout MB 940 7 1 8 Schematic Diagrams MB 940 8 1 ...

Страница 5: ...uch as thinners or benzine which will damage the finish of the unit The unit has been factory adjusted precisely Do not tamper with its internal parts or attempt to repair it The WRT 822B is a transmitter for a UHF synthesized wireless microphone system to be used for broadcast or movie production purpose This transmitter is suitable for Electronic News gathering ENG and Electronic Field Productio...

Страница 6: ...nnel number or frequency appears set the POWER switch to off position to release Setting mode or press the SET button to continue operations in Setting mode The next time you turn on the transmitter by setting the POWER switch to ON the transmitter will enter Transmitting mode with the selected channel number or frequency Attenuation level Accumulated time Channel indication D shows that of the CE...

Страница 7: ...TITE 2x12 B TITE 2x12 Case lower Battery case Antenna Connector S 4P Bracket MC MB 940 Board CN501 Battery Terminal Assy Case upper Knob P Case upper Red Black Red Gray Gray White Black White CN102 CN501 NG Battery Terminal Assy Spring battery coil NOTE Insert the wire into notch of the front case and assembly the it CN102 ...

Страница 8: ... EEPROM 2 3 Error Messages When a problem occurs one of the following error messages may appear on the display Messages Contents Measures Error 11 An error occurred in backup memory data It is necessary to write the corresponding frequency data to the EEPROM Error 21 The PLL synthesized circuit is in trouble Check the PLL synthesized circuit IC300 CP300 and its peripheral circuit on MB 940 board E...

Страница 9: ... kHz HEWLETT PACKARD 8903B with A weight filter or equivalent Distortion meter S N meter Level meter Frequency Counter Frequency 10 Hz to 1000 MHz HEWLETT PACKARD 5385A or equivalent Effective digits 10 digits Resolution 0 1 Hz Oscilloscope Frequency DC to 10 MHz _ Digital Volt Meter Effective digits 31 digits _ 2 Tools Required Name Part No Remarks MM SMA J connector J 6402 480 A For RF signal in...

Страница 10: ...ustments are performed remove the MB 940 board with battery terminal and Mic input connector from WRT 822B unit Refer to the Section 2 Service Overview for removal 2 Connect the MM SMA J connector J 6402 480 A with SMA BNC J connector J 6402 490 A to the an tenna connector CN301 on the MB 940 board as shown below 3 Connecting the DC power supply Supply the DC power to the battery terminal springs ...

Страница 11: ...rt No 7 721 052 81 Switch and Control Setting The following setting is to be perform with the SET switch S402 switch S400 and _ switch S401 Transmitting Channel setting Don t Care Attenuation setting Don t Care Accumulated time setting Don t Care Procedure 1 Set the POWER switch S500 on the MB 940 board to ON 2 Check the DC Voltage of the TP5V terminal to the spec ified voltage as below Specificat...

Страница 12: ...l 850 000 MHz U14 model 16 01 channel 482 125 MHz U30 model 32 01 channel 578 125 MHz U62 model 64 01 channel 770 125 MHz U66 model 68 01 channel 794 125 MHz Attenuation setting Don t Care Accumulated time setting Don t Care Procedure 1 Connect the frequency counter to the antenna connec tor CN301 with MM SMA J and SMA BNC J connectors 2 Adjust 1CT400 so that the frequency counter reading meets th...

Страница 13: ...Group 00 34 32 channel 578 000 MHz CE62 model Group 00 63 32 channel 810 000 MHz CE67 model Group 00 68 32 channel 850 000 MHz U14 model 16 01 channel 482 125 MHz U30 model 32 01 channel 578 125 MHz U62 model 64 01 channel 770 125 MHz U66 model 68 01 channel 794 125 MHz Attenuation setting Don t Care Accumulated time setting Don t Care Procedure 1 Connect the power meter with power sensor to the a...

Страница 14: ...witch and Control Setting The following setting is to be perform with the SET switch S402 switch S400 and _ switch S401 Transmitting Channel setting CE21 model Group 00 22 32 channel 482 000 MHz CE33 model Group 00 34 32 channel 578 000 MHz CE62 model Group 00 63 32 channel 810 000 MHz CE67 model Group 00 68 32 channel 850 000 MHz U14 model 16 01 channel 482 125 MHz U30 model 32 01 channel 578 125...

Страница 15: ...nalyzer reading meets the following speci fication Specification Frequency deviation 26 kHz 0 5 kHz Adjustment 1RV101 MB 940 board B side 5 Adjust 1RV102 so that the frequency deviation for the modulation analyzer reading meets the following speci fication Specification Frequency deviation 24 5 kHz 0 5 kHz Adjustment 1RV102 MB 940 board B side 3 2 6 Distortion Ratio Check Equipment and Tools DC po...

Страница 16: ...m signal to the MIC input connector SMC9 4P with Mic input cable from audio analyzer oscillator 3 Set the audio analyzer to S N measurement with A weighted filter 4 Check that the S N reading is more than 32 dB with MIC input connector short circuited Switch and Control Setting The following setting is to be perform with the SET switch S402 switch S400 and _ switch S401 Transmitting Channel settin...

Страница 17: ...14 model 14 01 channel 470 125 MHz U30 model 30 01 channel 566 125 MHz U62 model 62 01 channel 758 125 MHz U66 model 66 01 channel 782 125 MHz Attenuation setting 0 dB Accumulated time setting Don t Care Procedure 1 Connect the audio analyzer level meter to the AF OUT connector for the modulation analyzer 2 Set the audio analyzer to level meter mode 3 Input 1 kHz _60 dBV _57 8 dBm signal to the Mi...

Страница 18: ...lyzer MM SMA J connector Part No J 6402 480 A SMA BNC J connector Part No J 6402 490 A Switch and Control Setting The following setting is to be perform with the SET switch MB 940 Board A side Spectrum analyzer CN301 MM SMA J connector with SMA BNC J connector S402 switch S400 and _ switch S401 Transmitting Channel setting CE21 model Group 00 21 01 channel 470 125 MHz CE33 model Group 00 33 01 cha...

Страница 19: ...be perform with the SET switch S402 switch S400 and _ switch S401 Transmitting Channel setting CE21 model Group 00 21 01 channel 470 125 MHz CE33 model Group 00 33 01 channel 566 125 MHz CE62 model Group 00 62 01 channel 798 125 MHz CE67 model Group 00 67 01 channel 838 125 MHz U14 model 14 01 channel 470 125 MHz U30 model 30 01 channel 566 125 MHz U62 model 62 01 channel 758 125 MHz U66 model 66 ...

Страница 20: ...tput voltage of the DC regulated power supply and confirm that the battery alarm signal turns on at 2 0 2 V 3 Check that level difference between carrier frequency center frequency level on spectrum analyzer and tone signal is with in 29 2 dB V 10 dB div H 20kHz div 29 2 dB 20 dBm fc 32 782 kHz 2 Frequency check Connections For connecting the DC power supply refer to the Preparations on page 3 2 P...

Страница 21: ...00 63 32 channel 810 000 MHz CE67 model Group 00 68 32 channel 850 000 MHz U14 model 16 01 channel 482 125 MHz U30 model 32 01 channel 578 125 MHz U62 model 64 01 channel 770 125 MHz U66 model 68 01 channel 794 125 MHz Attenuation setting Don t Care Accumulated time setting Don t Care MB 940 Board A side Spectrum analyzer CN301 MM SMA J connector with SMA BNC J connector Procedure 1 Set the spectr...

Страница 22: ......

Страница 23: ...changes or standardization of genuine parts This manual s exploded views and electrical spare parts list are indicating the part numbers of the standardized genuine parts at present 3 Stock of Parts Parts marked with o SP Supply Code column of the spare parts list are not normally required for routine service work Orders for parts marked with o will be processed but allow for additional delivery t...

Страница 24: ... for U62 model A 8328 052 A s MOUNTED CIRCUIT BOARD MB 940 B for U66 model 4 A 8328 018 A s CONNECTOR ASSY 5 1 467 301 11 s DISPLAY LIQUID CRYSTAL 6 1 501 458 12 s ANTENNA for CE33 U30 model 1 754 177 11 s ANTENNA for CE62 CE67 U62 U66 model 1 754 178 11 s ANTENNA for CE21 U14 model 7 1 537 802 11 o CONDUCTIVE BOARD CONNECTION 8 2 540 502 04 o TERMINAL BOARD No Part No SP Description 9 2 545 242 0...

Страница 25: ...1 104 851 11 s CAP CHIP TANTALUM ELECT 10MF CE21 CE33 CE62 CE67 model C200 1 113 642 11 s CAP CHIP TANTALUM ELECT 47MF MB 940 BOARD Ref No or Q ty Part No SP Description C201 1 164 943 11 s CAP CHIP CERAMIC 10000PF B1005 C202 1 164 943 11 s CAP CHIP CERAMIC 10000PF B1005 C203 1 164 858 11 s CAP CHIP CERAMIC 22PF CH 1005 C204 1 164 858 11 s CAP CHIP CERAMIC 22PF CH 1005 C209 1 164 943 11 s CAP CHIP...

Страница 26: ...CO CE62 model CP301 1 251 830 21 s ISOLATOR CE62 model 1 251 831 21 s ISOLATOR CE67 model 1 251 958 21 s ISOLATOR U66 model 1 251 962 21 s ISOLATOR CE21 U14 model 1 251 966 21 s ISOLATOR CE33 U30 model 1 251 974 21 s ISOLATOR U62 model CS300 1 251 820 21 s COUPLING DIRECTION CT400 1 141 322 11 s CAP CHIP TYPE TRIMMER 20PF MB 940 BOARD Ref No or Q ty Part No SP Description D100 8 719 039 99 s DIODE...

Страница 27: ...CHIP 1 2K 1005 R131 1 208 707 11 s RES CHIP 10K 1005 R132 1 208 701 11 s RES CHIP 5 6K 1005 R133 1 208 703 11 s RES CHIP 6 8K 1005 MB 940 BOARD Ref No or Q ty Part No SP Description R134 1 208 885 11 s RES CHIP 820 1005 R135 1 208 719 11 s RES CHIP 33K 1005 R136 1 208 719 11 s RES CHIP 33K 1005 R137 1 218 989 11 s RES CHIP 1M 1005 R138 1 208 713 11 s RES CHIP 18K 1005 R139 1 218 732 11 s RES METAL...

Страница 28: ...5 11 s RES CHIP 100K 1005 R411 1 208 699 11 s RES CHIP 4 7K 1005 R412 1 208 935 11 s RES CHIP 100K 1005 R413 1 208 715 11 s RES CHIP 22K 1005 R414 1 208 683 11 s RES CHIP 1 0K 1005 R415 1 208 715 11 s RES CHIP 22K 1005 R416 1 208 683 11 s RES CHIP 1 0K 1005 R417 1 208 935 11 s RES CHIP 100K 1005 R418 1 208 715 11 s RES CHIP 22K 1005 R419 1 208 683 11 s RES CHIP 1 0K 1005 R420 1 208 683 11 s RES CH...

Страница 29: ... SOFT 1pc 3 205 119 11 s FREQUENCY LIST CE21 model 1pc 3 205 123 11 s FREQUENCY LIST CE33 model 1pc 3 205 133 11 s FREQUENCY LIST CE62 model 1pc 3 205 135 11 s FREQUENCY LIST CE67 model 1pc 3 205 136 11 s FREQUENCY LIST U14 model 1pc 3 205 140 11 s FREQUENCY LIST U30 model 1pc 3 205 148 11 s FREQUENCY LIST U62 model 1pc 3 205 149 11 s FREQUENCY LIST U66 model 1pc 3 205 431 11 s OPERATING INSTRUCTI...

Страница 30: ......

Страница 31: ...051AFT EL 5 4 TC74VHCU04FT EL 5 4 TC7W14FU TE12R 5 4 TRANSISTOR Page 2SA1965 TL 5 2 2SC3607 TE12L 5 2 2SC4738 YGR TE85L 5 2 2SC4919 TL 5 2 2SC5015 T1 5 2 DTA144EE TL 5 2 DTC114EE TL 5 2 FMMT617TA 5 2 XN4504 TX 5 2 The semiconductors in the manual are listed by equivalent types Thus the external view or the index mark indication may differ from the actual type In some cases incompatible types are a...

Страница 32: ... T1 TOP VIEW TOP VIEW TOP VIEW TOP VIEW TOP VIEW 2SA1965 TL TOP VIEW 2SC3607 TE12L TOP VIEW 2SC4738 YGR TE85L 2SC4919 TL FMMT617TA B E E C TOP VIEW WIDE 2SC5015 T1 TOP VIEW R1 R2 DTA144EE TL R1 47 k R2 47 k TOP VIEW R1 R2 DTC114EE TL R1 10 k R2 10 k 6 5 4 TOP VIEW 1 2 3 5 6 4 1 2 3 XN4504 TX ...

Страница 33: ...INPUT L POWER SAVE MODE SELECTION TERMINAL FOR PHASE OF PHASE COMPARATOR OUTPUT AND COUNTER OUTPUT SIGNAL TO TEST TERMINAL OUTPUT FOR DIVIDING SIGNAL OF COUNTER OSCI OSCO Vp Do1 Do2 LD ØP ØR CK DATA LAT PS FC TEST NC NC NC GND VCC PLL FREQUENCY SYNTHESIZER 1 1 GHz BAND TOP VIEW CXA1786N T4 SONY 1 2 3 4 8 7 6 5 VEE VCC _ _ DUAL OPERATIONAL AMPLIFIERS TOP VIEW MC33077DR2 MOTOROLA V_ V _ 1 2 3 5 4 IN...

Страница 34: ...EN 2 3 OPEN INH V EE ch1 ch0 2 3 C A 6 7 1 5 GND 4 8 VDD 6 7 5 ON CHANNEL CONT INPUT C MOS 2 CHANNEL MULTIPLEXER DEMULTIPLEXER TOP VIEW 0 1 x LOW LEVEL HIGH LEVEL DON T CARE TC74HC4051AFT EL TOSHIBA 0 1 x LOW LEVEL HIGH LEVEL DON T CARE X0 X7 XC A B C EN ANALOG INPUTS OUTPUTS COMMON INPUT OUTPUT CHANNEL SELECT INPUT ENABLE INPUT 1 16 15 14 13 2 3 4 VDD GND VEE X1 X0 5 12 11 10 9 6 7 8 B C X3 A X2 ...

Страница 35: ...ock 47 DI OUT EEPROM PLL data out 48 CS OUT EEPROM chip select 49 LAT OUT PLL latch PIN SIGNAL I O DESCRIPTION 50 POFF OUT OUT Power off 51 REM OUT RF muting 52 DO IN EEPROM data in 53 LD IN PLL lock 54 to 57 NC 58 BAT0 IN VDD 5 0 V 59 BAT1 IN Battery voltage 60 DEST IN Selection for destination 61 ALO IN AF level 62 63 Ground 64 AVSS Ground 65 AVREF IN A D convertor reference voltage 66 VDD VDD 5...

Страница 36: ......

Страница 37: ...l level on the LCD ND400 PLL and RF circuit block The oscillation circuit utilizes the PLL frequency synthesiz er method The VCO CP300 acts as an oscillator and mod ulator for the carrier frequency through voltage control The carrier frequency is controlled by the serial data PLL data sent from the CPU to the PLL IC IC300 The signal is amplified by the RF amplifier circuit Q303 304 is output from ...

Страница 38: ...tal OSCILLATOR X tal OSCILLATOR X201 X200 IC200 4 6 5 6 IC200 1 6 IC201 A D CONVERTER IC102 D104 D400 F102 BUFFER AMP IC203 1 2 EEPROM IC402 CPU IC405 D A CONVERTER IC200 3 6 L P F C308 R305 X tal OSCILLATOR X400 IC400 IC300 PLL LCD ND400 Q300 COMPARATOR LD IC404 Q400 RESET CN501 BATTERY LR6x2 POWER SWITCH S500 DC DC CONVERTER 5V Q500 Q501 Q502 Q503 D500 D505 IC500 Q510 VCC1 5V VCC2 3 3V ANTENNA V...

Страница 39: ...7 1 WRT 822B 7 1 Section 7 Board Layout MB 940 MB 940 MB 940 A SIDE SUFFIX 11 MB 940 B SIDE SUFFIX 11 ...

Страница 40: ......

Страница 41: ... 5 6k 1 16W 0 5 5 6k 1 16W 0 5 5 6k 1 16W 0 5 5 6k 1 16W 0 5 5 6k 1 16W 0 5 5 6k 1 16W 0 5 5 6k 1 16W 0 5 6 8k 1 16W 0 5 10k 1 16W 0 5 10k 1 16W 0 5 10k 1 16W 0 5 18k 1 16W 0 5 22k 1 16W 0 5 33k 1 16W 0 5 33k 1 16W 0 5 33k 1 16W 0 5 47k 1 16W 0 5 47k 1 16W 0 5 100k 1 16W 0 5 100k 1 16W 0 5 100k 1 16W 0 5 100k 1 16W 0 5 100k 1 16W 0 5 100k 1 16W 0 5 100k 1 16W 0 5 100k 1 16W 0 5 100k 1 16W 0 5 100k...

Страница 42: ...S367 T3SONY 100k 1 16W 0 5 10µ 10V TA A 100 1 16W 0 5 47k 1 16W 0 5 10k 1 16W 0 5 DTC114EE TL 100µ 10V NEO E 10µH 3225 22µ 10V TA B 0 01µ 16V B RH5RH503B T1 100 1 16W 0 5 1k 1 16W 0 5 4 7µ 10V NEO A 0 1µ 10V B UMZ8 2T T106 UMZ8 2T T106 CMS 2214C MA133 TX VCC NM GND NM 10 10V TA A 2SC4738 YGR TE85 L 10k 1 16W 0 5 4 7k 1 16W 0 5 1SS367 T3SONY LR6 1 5V LR6 1 5V ACF321825 152 2SC3607 TE12 51 1 16W 0 5...

Страница 43: ...p 16V B 1000p 16V B 10k 1 16W 0 5 0 1µ 10V B 10µ 10V TA A TC7W14FU TE12R TC7W14FU TE12R TC7W14FU TE12R 0 01µ 16V B TEST NM 100k 1 16W 0 5 UMZ8 2T T106 UMZ8 2T T106 100k 1 16W 0 5 RXD NM TXD NM 47k 1 16W 0 5 47k 1 16W 0 5 47k 1 16W 0 5 S 80820ANNP EDH 2 2µH 3225 2 2µ 3225 NM NM 100k 1 16W 0 5 1SS367 T3SONY SM06B SRSS TB JST NM TP404 NM 0 01µ 16V B µPD75P3036GK T82 100k 1 16W 0 5 1k 1 16W 0 5 1k 1 1...

Страница 44: ......

Страница 45: ......

Страница 46: ...Printed in Japan 2001 3 11 Sony Corporation 2001 WRT 822B U CE E 9 976 897 01 ...

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