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Sony WRT-808A Service Manual

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Sony Corporation
WRT-808A (U) E
Broadcasting & Professional Systems Company
9-976-875-01
Printed in Japan
1999. 7 11
©1999
UHF SYNTHESIZED TRANSMITTER
WRT-808A
SERVICE MANUAL
U Model
1st Edition

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  • Page 1 UHF SYNTHESIZED TRANSMITTER WRT-808A SERVICE MANUAL U Model 1st Edition Printed in Japan Sony Corporation WRT-808A (U) E 1999. 7 11 Broadcasting & Professional Systems Company 9-976-875-01 ©1999...
  • Page 2 électrique, d’incendie ou de blessure n’effectuer que les réparations indiquées dans le mode d’emploi à moins d’être qualifié pour en effectuer d’autres. Pour toute réparation faire appel à une personne compétente uniquement. WRT-808A (U)

  • Page 3: Table Of Contents

    4. Semiconductor Pin Assignments 5. Spare Parts 5-1. Notes on Repair Parts .................. 5-1 5-2. Exploded Views ..................5-2 5-3. Electrical Parts List ..................5-4 5-4. Accessories Supplied .................. 5-7 6. Block Diagram Overall Block Diagram ................6-1 WRT-808A (U)
  • Page 4 7. Board Layouts and Schematic Diagrams 7-1. Board Layouts ..................... 7-1 AF-27 ......................7-1 RF-90 ......................7-1 7-2. Schematic Diagrams ..................7-2 AF-27 ......................7-2 RF-90 ......................7-3 WRT-808A (U)
  • Page 5 A 12-MHz frequency band (or two consecutive-numbered Une licence est normalement requise. Le bureau de TV channels, such as 68 and 69 of the WRT-808A/68 For the selectable channels, see “Wireless Channel Lists” on You are cautioned that any changes or modifications not l’Industrie Canada doit être contacté.
  • Page 6 Easy and reliable connection LED indication of audio input The WRT-808A can be adapted to a wide variety of wired The AF/PEAK indicator allows you to comprehend the microphone which has a XLR audio connector. The reliable POWER switch condition of audio input level at a glance.
  • Page 7 Hold Example: when channel 69-05 is selected for U68 model By turning the control to “–10”, the WRT-808A provides 50 the microphone itself as shown. dB input attenuation and can be inputted +4 dB (maximum Set the right switch to “5”...
  • Page 8 Wireless Channel Lists / Listes des canaux sans fil / Listas de canales inalámbricos For 68-Version Model Using TV Channels 68 and 69 / For 64-Version Model Using TV Channels 64 and 65 / Pour le modèle 68 utilisant les canaux de télévision 68 et 69 / Pour le modèle 64 utilisant les canaux de télévision 64 et 65 / Para modelos de la versión 68 que utilizan los canales de TV 68 y 69 Para modelos de la versión 64 que utilizan los canales de TV 64 y 65...

  • Page 9: Service Overview

    Battery lid assembly Case (front) Main frame assembly, Case (rear), Battery spring assembly Battery spring assembly Main frame assembly Switching screw (case) AF-27 mounted PC board CN301 Sheet (PWR) Case (rear) Case (rear) assembly P2 x 3.5 to page 2-2 WRT-808A (U)
  • Page 10 Frame assembly, XLA 3P connector B2 x 4 Frame assembly Connector assembly * XLR 3P connector (male) Coil spring (ring) Ring XLA 3P connector * Tool required Connector bracket . XLR 3P connector (male) (Sony Part No. : 1-563-030-21) WRT-808A (U)

  • Page 11: Note On Reassembly

    AF-27 board (male) Frame assembly * Tool required 3. LED (D502, D503) . XLR 3P connector (male) (Sony part No. : 1-563-030-21) Attuch the XLR 3P connector (male), securely to the connector assembly. D502 Frame assembly D503 * XLR 3P connector (male)

  • Page 13: Electrical Alignment

    Frequency: DC to 10 MHz Digital Volt Meter Effective digits: 3 / digits Tools Required Name Part No. Remarks MM-SMA (J) connector J-6402-480-A For RF signal output SMA-BNC (J) connector J-6402-490-A For RF signal output Adjustor (0.4 x 1.3 mm) 7-721-052-81 WRT-808A (U)

  • Page 14: Adjustments

    Preparation 1. When adjustments are performed, remove the Main frame This section describes the following adjustments and checks assembly (with battery terminal) from WRT-808A unit. required to satisfy specifications. Refer to the “Section 2. Service Overview” for removal. 2. Peel off the copper leaf sheet from the main frame Adjustment and Check Items assembly.
  • Page 15 After the DC power supply connection is completed, set the power switch (S301) to ON, and check the level on DC ammeter. DC ammeter indication level: 160 to 200 mA TP201 RV201 (Tone signal) RV202 (Ref. frequency dev.) S401 (RF power output) S301 (Power) AF-27 Board WRT-808A (U)
  • Page 16 (GND) Specification: Carrier frequency mentioned in the table below. WRT-808A Carrier frequency 776.125 MHz ± 1 kHz U64 model 788.125 MHz ± 1 kHz U66 model 800.125 MHz ± 1 kHz U68 model Adjustment: 1CT301/RF-90 Board (B side) WRT-808A (U)
  • Page 17 U64 model: 65-01 channel (776.125 MHz) U66 model: 67-01 channel (788.125 MHz) U68 model: 69-01 channel (800.125 MHz) RF power output switch (S401): 50 mW Input LEVEL control (RV101): “_60” (0 dB attenuation) Turn the RV101 clockwise fully. WRT-808A (U)

  • Page 18: Maximum Frequency Deviation Check

    (3) After the adjustment has been completed, perform the “3-2-5. Maximum Frequency Deviation Check”. Oscillator Audio analyzer Oscillator MIC input (CN101) Level meter POWER/BATT (D502) AF/PEAK (D503) Modulation Oscilloscope analyzer RF IN AF OUT CN402 MM-SMA (J) connector with SMA-BNC (J) connector RF-90 Board WRT-808A (U)

  • Page 19: Distortion Ratio Check

    SMA-BNC (J) connector input connector (CN101) with Mic input cable. (2) Check that the frequency deviation for the modulation Oscilloscope analyzer reading meets the following specification. Specification: Frequency deviation = ± 40 kHz ± 3 kHz RF-90 Board WRT-808A (U)

  • Page 20: Input Level Control Check

    (level meter) reads 0 (6) Turn the RV101 (Input LEVEL control) counterclock- wise fully. (7) Check that audio analyzer (level meter) reading is _26 dB. (Indication level is _26 dB as compared with the read level of procedure (5) above.) WRT-808A (U)
  • Page 21 SMA-BNC (J) connector Lights in red. Less than or equal to 2.0 V ±0.1 V Flashing in red Less than or equal to 1.8 V ±0.2 V Goes out. Less than or equal to 1.2 V RF-90 Board ±0.2 V WRT-808A (U)

  • Page 22: S/N Check

    U64 model: 65-01 channel (776.125 MHz) U66 model: 67-01 channel (788.125 MHz) U68 model: 69-01 channel (800.125 MHz) RF power output switch (S401): 50 mW Input LEVEL control (RV101): “_60” (0 dB attenuation) Turn the RV101 clockwise fully. 3-10 WRT-808A (U)

  • Page 23: Frequency Characteristics Check

    (7) Check that audio analyzer (level meter) reading is 0 ± 1.0 dB. with SMA-BNC (J) connector (8) Next, switch the oscillation frequency for the audio analyzer (oscillator) from 100 Hz to 10 kHz. (9) Check that the reading for the audio analyzer (level meter) is _1.0 ±1.0 dB. WRT-808A (U) 3-11...
  • Page 24 (1) Set the modulation analyzer as follows: MEASUREMENT: MEASUREMENT RANGE: ± 40 kHz HPF: 4 kHz LPF: >20 kHz DE EMPHASIS: (2) Check that the frequency counter (resolution : 0.1 Hz setting) reading is 32.768 kHz ± 1 Hz. 3-12 WRT-808A (U)

  • Page 25: Battery Alarm Signal Check

    - wiring side - Short-circuit V : 10 dB/div H : 20kHz/div 32.782 kHz Spectrum analyzer Tweezers Bridge the TP201 CN402 and frame (GND) MM-SMA (J) connector TP201 with tweezers. with SMA-BNC (J) connector TP201 Frame Frame WRT-808A (U) 3-13...
  • Page 26 (1) Set the modulation analyzer as follows: MEASUREMENT: MEASUREMENT RANGE: ± 40 kHz HPF: 4 kHz LPF: >20 kHz DE EMPHASIS: (2) Set the DC output voltage of DC power supply to 2.0 ± 0.1 V so that battery alarm signal goes on. 3-14 WRT-808A (U)

  • Page 27: Spurious Emissions Check

    U64 model: 65-01 channel (776.125 MHz) U66 model: 67-01 channel (788.125 MHz) U68 model: 69-01 channel (800.125 MHz) RF power output switch (S401): 50 mW Input LEVEL control (RV101): “_60” (0 dB attenuation) Turn the RV101 clockwise fully. WRT-808A (U) 3-15...

  • Page 28: Occupied Band Width Check

    U64 model: 65-01 channel (776.125 MHz) U66 model: 67-01 channel (788.125 MHz) U68 model: 69-01 channel (800.125 MHz) RF power output switch(S401): 50 mW Input LEVEL control (RV101): “_60” (0 dB attenuation) Turn the RV101 clockwise fully. 3-16 WRT-808A (U)
  • Page 29 S-81233SGUP-DQF-T1 ... 4-3 FMMT617TA ....4-2 SA575DK-T ...... 4-4 UMG8-TL ......4-2 TC4069UBFT(EL,N) ..4-4 UMG8-TR ......4-2 TC4S11F ......4-4 TC4S11F(TE85R) .... 4-4 XN4504 ......4-2 TC4W53FU ...... 4-4 XN4504-TX ...... 4-2 TC4W53FU(TE12R) ..4-4 TC7WU04FU(TE12R) ..4-4 WRT-808A (U)
  • Page 30 A : RED UMG8-TL B : GREEN (R1=4.7 k,R2=47 k) UMG8-TR —TOP VIEW— RD9.1SB RD9.1SB-T1 —TOP VIEW— 2SC4738-YGR-TE85L 2SC4919 —TOP VIEW— 2SC4919-TL 2SD2216-Q (TOSHIBA) XN4504 XN4504-TX FMMT617TA —TOP VIEW— UMZ8.2T UMZ8.2T-T106 —TOP VIEW— 2SC5015-T1 WIDE —TOP VIEW— DTA144EE DTA144EE-TL WRT-808A (U)
  • Page 31 PULSE SWALLOW PROGRAMMABLE —TOP VIEW— COUNTER DATA SHIFT RESISTOR LATCH MC33077DR2 (MOTOROLA) DUAL OPERATIONAL AMPLIFIERS (DUAL-SUPPLY TYPE) —TOP VIEW— S-81233SGUP-DQF-T1 (SEIKO I&E) POSITIVE VOLTAGE REGULATOR —TOP VIEW— NJM2107F (JRC) NJM2107F-TE2 SINGLE OPERATIONAL AMPLIFIER —TOP VIEW— +INPUT _INPUT OUTPUT WRT-808A (U)
  • Page 32 GND 3 Y = A • B = : LOW LEVEL : HIGH LEVEL TC4W53FU (TOSHIBA) TC4W53FU(TE12R) C-MOS 2-CHANNEL MULTIPLEXER/DEMULTIPLEXER —TOP VIEW— OPEN GND 4 CONT. INPUT CHANNEL : LOW LEVEL : HIGH LEVEL OPEN : DON’T CARE WRT-808A (U)
  • Page 33 CH-4 CH SW-4 — Setting destination CH-8 CH SW-8 Battery detection NC: 1, 6, 10, 16, 20, 21, 30 to 37, 39 to 41, 43 to 48, 53, 58, 60 to 63, 67, 69, 71, 74, 79, 80 WRT-808A (U)

  • Page 35: Spare Parts

    Therefore, specified parts should be used in the case of replacement. 2. Standardization of Parts Some repair parts supplied by Sony differ from those used for the unit. These are because of parts common- ality and improvement. Parts list has the present standardized repair parts.

  • Page 36: Exploded Views

    2-545-790-01 o CASE (REAR) 2-545-792-01 o PANEL, CONTROL 2-545-805-01 s +P 2X3.5 2-545-818-01 s SHEET, COPPER LEAF 2-545-819-01 s SHEET, ABSORPTION 2-545-819-11 s SHEET, ABSORPTION 2-545-821-01 s B TITE 2X4 3-880-990-00 s SCREW,FLAT (+) 1.7X3 (STEEL) Screws/Washers 7-624-104-04 s STOP RING,E-2 WRT-808A (U)
  • Page 37 Suppied with STOP RING, WRT-808A (U)

  • Page 38: Electrical Parts List

    1-218-690-11 s RESISTOR CHIP 820 1/16W (1608) C303 1-115-170-11 s CAPACITOR,TANTAL(SMD)4.7MF/10V R125 1-218-707-11 s RESISTOR,CHIP 4.3K 1/16W(1608) R126 1-216-833-11 s RESISTOR,CHIP 10K 1/16W 1608 C304 1-162-977-11 s CAPACITOR,CERAMIC 1800P/50V(B) C305 1-162-970-11 s CAPACITOR CERAMIC 0.01MF/25V B R127 1-216-845-11 s RESISTOR,CHIP 100K 1/16W(1608) WRT-808A (U)
  • Page 39 C515 1-162-970-11 s CAPACITOR CERAMIC 0.01MF/25V B C516 1-162-970-11 s CAPACITOR CERAMIC 0.01MF/25V B C551 1-162-921-11 s CAPACITOR,CERAMIC 33PF/50V CH C552 1-162-910-11 s CAPACITOR,CERAMIC 5PF/50V 1608 C553 1-162-970-11 s CAPACITOR CERAMIC 0.01MF/25V B C554 1-135-179-21 s CAPACITOR,TANTALUM 2.2MF/16V WRT-808A (U)
  • Page 40 8-729-928-27 s TRANSISTOR DTA144EE X551 1-760-474-11 s VIBRATOR, CRYSTAL Q503 8-729-928-27 s TRANSISTOR DTA144EE Q504 8-729-928-27 s TRANSISTOR DTA144EE R401 1-216-837-11 s RESISTOR,CHIP 22K 1/16W 1608 R402 1-216-833-11 s RESISTOR,CHIP 10K 1/16W 1608 R403 1-216-845-11 s RESISTOR,CHIP 100K 1/16W(1608) WRT-808A (U)

  • Page 41: Accessories Supplied

    5-4. Accessories Supplied ----- FRAME Ref. No. ----- or Q'ty Part No. SP Description Ref. No. or Q'ty Part No. SP Description 3-866-919-12 s MANUAL, INSTRUCTION 1-750-551-11 o CONNECTOR, XLA 3P WRT-808A (U)

  • Page 43: Overall Block Diagram

    Overall Block Diagram AF-27 BOARD RF-90 BOARD CONNECTER CN101 BUFF COM- PRESSOR EMPHASIS VOLTAGE CONTROL VOLTAGE Q402 REGULATOR FL101 IC101 (1/2) IC101 (2/2) IC103 (1/2) IC104 (1/2) C130 IC103 (2/2) Q403 R122 D403 CN103 IC401 INTERNAL ANTENNA 0~50 dB SWITCH COUPLER POWER ISO-...
  • Page 45 AF-27, RF-90 AF-27, RF-90 Section 7 Board Layouts and Schematic Diagrams 7-1. Board Layouts AF-27 RF-90 -A SIDE- -A SIDE- 1-674-806-12 1-674-807-12 AF-27 RF-90 -B SIDE- -B SIDE- 1-674-806-12 1-674-807-12 WRT-808A (U)
  • Page 46 1.5V C308 C309 R306 D302 TO/FROM 1SS367-T3S 1/16W D303 TA-B NEO-A CN501,RF-90 UMZ8.2T-T1 POFF IC301 POFF POFF C310 RH5RH503B- 47µF C304 Q302 6.3V 0.0018 UMG8-TR TA-B Q301 FMMT617TA C307 R301 CN102 1.5k 1/16W 1.6V NEO-E IMSA-9269S-14A AF-27 TP302 WRT-808A (U)
  • Page 47 2.4V C553 R554 R553 0.01 100k 1/16W 1/16W IC552 S-80845ALN RESET R551 2.6V 1M 1/16W VDD OUT 6 3 5 6 3 5 R552 X551 1.8k 4MHz 1/16W C554 S504 S505 KUDR10-S KUDR10-S C551 C552 TA-A CT301 RF-90 WRT-808A (U)

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