Sony WRT-847A Service Manual
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Sony WRT-847A Service Manual

Uhf synthesized transmitter unit
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UHF SYNTHESIZED TRANSMITTER UNIT
WRT-847A
WRT-847B
SERVICE MANUAL
1st Edition

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Summary of Contents for Sony WRT-847A

  • Page 1 UHF SYNTHESIZED TRANSMITTER UNIT WRT-847A WRT-847B SERVICE MANUAL 1st Edition...
  • Page 2 Ce manual est destiné uniquement aux personnes compétentes en charge de l’entretien. Afin de réduire les risques de décharge 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-847A/847B...

  • Page 3: Table Of Contents

    4. Spare Parts 4-1. Notes on Repair Parts .................. 4-1 4-2. Exploded Views and Parts List ..............4-2 4-3. Electrical Parts List ..................4-4 4-4. Supplied Accessories .................. 4-9 5. Semiconductor Pin Assignments ..........5-1 6. Block Diagram ..................6-1 WRT-847A/847B...
  • Page 4 7. Board Layout CN-2055 ...................... 7-1 DP-341 ......................7-1 RF-96 ......................7-1 MB-914 ....................... 7-2 8. Schematic Diagrams DP-341 ......................8-1 RF-96 ......................8-2 CN-2055 ...................... 8-3 MB-914 ....................... 8-3 WRT-487A/847B...
  • Page 5 http://getMANUAL.com...

  • Page 11: Disassembly

    3. Stop ring removal tool Stop ring Push the hooks on the stop ring with the stop ring removal tool and remove grip 3. Grip 3 *Tool required . Stop ring removal tool (Sony part No. : J-6407-000-A) WRT-847A/847B...
  • Page 12 Switch cover, Switch assembly, Grip 2 Switch cover Switch assembly Grip 2 Switch Tweezers LCD plate +K (M2x7) Unit assembly +B type (M2x4) Grip 2 WRT-847A/847B...
  • Page 13 Chassis, Lid A, Lid B, CN-2055 board, DP-341 board, RF-96 board, MB-914 board +B (M2x4) Lid B Lid A Chassis Screw RF-96 board DP-341 board CN-2055 board Unsolder Chassis MB-914 board Unsolder – SHEET Chassis WRT-847A/847B...

  • Page 14: Note On Parts Replacement And Reassembly

    DP-341 board Chassis DP-341 board Chassis When attaching the DP-341 board to the chassis, insert the DP-341 board in the order 1 and 2 in the direction of the arrow as shown. Connector (CN201) DP-341 board MB-914 board Connector (CN302) WRT-847A/847B...

  • Page 15: Error Messages

    RF output power again. Error 21 The PLL synthesized circuit is in trouble Check the PLL synthesized circuit (IC402, CP401, and its peripheral circuit) on MB-914 board. Error 31 The battery voltage exceeds the allowable value. Don't exceed 4.2 V. WRT-847A/847B...

  • Page 17: Electrical Alignment

    Remarks RF adjusting cable J-6402-390-A For RF signal input RF conversion connector J-6402-490-A For RF signal input AF input cable J-6407-010-A For AF signal input Adjustor (0.4 x 1.3 mm) 7-721-052-81 Stop ring removal tool J-6407-000-A For removal stopring WRT-847A/847B...

  • Page 18: Adjustments

    Preparation 1. Remove the MB-914 board, DP-341 board, RF-96 board This section describes the following adjustments and checks and CN-2055 board from WRT-847A/847B unit, and required to satisfy specifications. then the MB-914, DP-341, RF-96 boards must be con- nected electrically as shown below.
  • Page 19 Specification: DC Voltage at CL308 S202 (–) = +3.3 ± 0.1 V dc S201 (+) S203 (SET) CT201 RV304 RV301 RV303 S301 (POWER) DP-341 board RF-96 board RV402 RV401 CT401 CN402 MB-914 board (B side) MB-914 board (A side) WRT-847A/847B...
  • Page 20 (CN402) with RF adjusting cable (and Specification: Carrier frequency mentioned in the table RF conversion connector). below. (2) Adjustment Specification: Power meter = Maximum WRT-847A/B Carrier frequency Adjustment: 1CT401/RF-96 Board (A side) 482.125 MHz ± 1 kHz U14 model (3) Adjustment 578.125 MHz ±...

  • Page 21: Maximum Frequency Deviation Adjustment

    Specification: Frequency deviation = ± 5 kHz ± 0.1 kHz Adjustment: 1RV402/RF-96 board (A side) RV301 RV303 RV304 (6) After the adjustment has been completed, perform the MB-914 board (B side) “3-2-5. Maximum Frequency Deviation Adjustment”. WRT-847A/847B...
  • Page 22 50 Hz LPF: 15 kHz or 20 kHz DE EMPHASIS: 50 us (3) Adjust 1RV303 so that the frequency deviation for the modulation analyzer reading meets the following speci- fication. Specification: Frequency deviation = Maximum Adjustment: 1RV303/MB-914 board (B side) WRT-847A/847B...

  • Page 23: Distortion Ratio Check

    MB-914 board (A side) Switch and Control Setting First, Perform the same setting as described in “4. Switch and Control Setting during Adjustment and Checking,” on page 3- 3, then perform the following setting: RF power setting:“H” (= 50 mW) WRT-847A/847B...

  • Page 24: S/N Check

    (6) Switch the oscillation frequency for the audio analyzer (oscillator) from 1 kHz to 100 Hz. (7) Check that audio analyzer (level meter) reading is +2.0 ± 1.0 dB. (Indication level is +2.0 ± 1.0 dB as compared with the read level of procedure (5) above.) WRT-847A/847B...

  • Page 25: Tone Signal Adjustment

    H : 20 kHz/div Connections 32.768 kHz (For connecting the DC power supply, refer to the “Prepara- tions” on page 3-2.) RF adjusting Spectrum analyzer cable RF conversion connector RF-96 board DP-341 board CN402 MB-914 board (A side) RV301 (B side) WRT-847A/847B...

  • Page 26: Battery Alarm Signal Check

    RF conversion connector HPF: 4 kHz DP-341 board RF-96 board LPF: >20 kHz RF adjusting cable DE EMPHASIS: Spectrum (3) Check that the frequency counter (resolution : 0.1 Hz analyzer setting) reading is 32.768 kHz ± 1 Hz. 3-10 WRT-847A/847B...
  • Page 27 32.782 kHz ± 1 Hz. (5) After the checking, remove (unsolder) the jumper wire between CL304 (TONE) and CL302 (GND) on the MB- V : 10 dB/div 914 board (A side). H : 20 kHz/div 32.782 kHz WRT-847A/847B 3-11...

  • Page 28: Spurious Emissions Check

    Switch and Control Setting 2.5 GHz (fc) First, Perform the same setting as described in “4. Switch and Control Setting during Adjustment and Checking,” on page 3- 3, then perform the following setting: RF power setting:“H” (= 50 mW) 3-12 WRT-847A/847B...

  • Page 29: 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 30: Exploded Views And Parts List

    4-2. Exploded Views and Parts List K 2x6 B 2x4 B 2x4 WRT-847A/847B...
  • Page 31 P15, O RING 3-622-289-01 PLATE 3-631-708-01 GRIP 3 3-631-712-01 PLATE, LCD 3-631-713-01 COVER, SWITCH 3-631-716-01 RING, STOP 3-631-717-01 SPRING, BATTERY 3-631-718-01 SWITCH 3-631-727-01 SUPPORT (M2, L4) 3-631-729-01 CUSHION 3-631-730-01 SHEET 3-631-731-01 LABEL 3-631-748-01 GRIP 2 3-678-336-01 PLATE (LCD) 3-678-343-01 CASE (LCD) WRT-847A/847B...

  • Page 32: Electrical Parts List

    1-216-841-11 s RESISTOR, CHIP 47K 1/16W 1608 R211 1-216-845-11 s RESISTOR,CHIP 100K 1/16W(1608) R212 1-216-845-11 s RESISTOR,CHIP 100K 1/16W(1608) R213 1-216-829-11 s RESISTOR,CHIP 4.7K 1/16W(1608) R214 1-216-816-11 s RESISTOR, CHIP 390 1/16W 1608 R215 1-216-833-11 s RESISTOR,CHIP 10K 1/16W (1608) WRT-847A/847B...
  • Page 33 1-104-851-11 s CAPACITOR,TANTALUM 10MF/10V C351 1-135-149-21 s CAPACITOR TANTALUM 2.2MF/10V C352 1-162-915-11 s CAPACITOR,CERAMIC 10PF/50V CH C353 1-135-149-21 s CAPACITOR TANTALUM 2.2MF/10V C354 1-164-174-11 s CAPACITOR,CERAMIC 8200PF/25V B C355 1-135-149-21 s CAPACITOR TANTALUM 2.2MF/10V C356 1-162-965-11 s CAPACITOR,CERAMIC 1500PF/50V B WRT-847A/847B...
  • Page 34 8-729-425-18 s TRANSISTOR XN4504 R345 1-216-823-11 s RESISTOR, CHIP 1.5K 1/16W Q304 8-729-031-69 s TRANSISTOR 2SA1965-TL R346 1-216-825-11 s RESISTOR,CHIP 2.2K 1/16W 1608 Q305 8-729-928-90 s TRANSISTOR DTC114EE R347 1-216-829-11 s RESISTOR,CHIP 4.7K 1/16W(1608) R349 1-216-830-11 s RESISTOR,CHIP 5.6K 1/16W 1608 WRT-847A/847B...
  • Page 35 1-162-908-11 s CAPACITOR,CERAMIC 3PF/50V 1608 (CE62/CE67/U62/U66/AU66 model) S301 1-771-756-11 s SWITCH, SLIDE 1-162-909-11 s CAPACITOR,CERAMIC 4PF/50V CH (CE21/CE33/U14/U30 model) T301 1-435-951-11 s TRANSFORMER, DC-DC CONVERTER C430 1-162-908-11 s CAPACITOR,CERAMIC 3PF/50V 1608 X301 1-767-314-11 s VIBRATOR, CRYSTAL X302 1-760-928-21 s OSCILLATOR, CRYSTAL WRT-847A/847B...
  • Page 36 L408 1-414-464-31 s INDUCTOR, CHIP (J) 12NH (CE67 model) R426 1-216-821-11 s RESISTOR,CHIP 1.0K 1/16W(1608) 1-414-465-31 s INDUCTOR, CHIP (J) 15NH (U62 model) (CE21/CE33/CE62/U14/U30/U62/U66/AU66 model) 1-216-833-11 s RESISTOR,CHIP 10K 1/16W (1608) (CE21/CE33/CE62/CE67/U14/U30/U66/AU66 model) R427 1-216-829-11 s RESISTOR,CHIP 4.7K 1/16W(1608) WRT-847A/847B...

  • Page 37: Supplied Accessories

    3-205-135-11 s FREQUENCY LIST (CE67 model) 3-205-136-11 s FREQUENCY LIST (U14 model) 3-205-140-11 s FREQUENCY LIST (U30 model) 3-205-148-11 s FREQUENCY LIST (U62 model) 3-205-149-11 s FREQUENCY LIST (U66 model) 3-205-150-11 s FREQUENCY LIST (AU66 model) 3-631-690-01 o CASE,CARRY 3-682-248-01 s REST,ARM WRT-847A/847B...
  • Page 39 DTC143ZE-TL ........5-2 RH5RH583B-T1 ........5-3 FMMT617TA ........5-2 S-80827ANNP-EDQ-T2 ...... 5-4 S-81233SGUP-DQF-T1 ...... 5-4 UMG8-TR ..........5-2 SA575DK-T ......... 5-4 XN4504-TX ......... 5-2 TA75S393F-TE85R ......5-4 TC4069UBFT (EL,N) ......5-4 TC4S11F (TE85R) ......5-4 TC74VHCU04FT (EL) ......5-4 WRT-847A/847B...
  • Page 40 2SA1965-TL DTC114EE-TL 1SS355TE-17 DTC143ZE-TL 1SS367-T3SONY -TOP VIEW- GL1HY51-TE84L -TOP VIEW- 2SC3607-TE12L UMG8-TR ( WIDE ) -TOP VIEW- -TOP VIEW- 2SC4738-YGR-TE85L MA133-TX 2SC4919-TL FMMT617TA -TOP VIEW- XN4504-TX -TOP VIEW- -TOP VIEW- UMZ8.2T-T106 2SC5015-T1 WIDE TOP VIEW CPH6403-TL -TOP VIEW- DTA144EE-TL WRT-847A/847B...
  • Page 41 [|IC|] ADG704BRM-REEL7 (AD) CXA1786N-T4 (SONY) 4-CHANNEL ANALOG MULTIPLEXER PLL FREQUENCY SYNTHESIZER (1.1 GHz BAND) TOP VIEW TOP VIEW OPEN OSCI : REFERENCE FREQUENCY INPUT OSCO : REFERENCE FREQUENCY OUTPUT OSCI flR : POWER SUPPLY FOR CHARGE PUMP, XC 8 PHASE COMPARATOR...
  • Page 42 GAIN CELL SUM NODE 2 GAIN CELL GAIN CELL GAIN CELL TA75S393F-TE85R (TOSHIBA) SINGLE COMPARATOR TOP VIEW IN (_) IN (+) TC4069UBFT(EL,N) (TOSHIBA) C-MOS INVERTER TOP VIEW Y = A Y = A ; LOW LEVEL ; HIGH LEVEL WRT-847A/847B...
  • Page 43 4 MHz clock – Channel switch _ RESET Reset SET switch VSS (Ground) EEPROM/PLL Clock LCD Back-light DATA EEPROM/PLL data out TONE-OFF Tone switch EEPROM chip select 76 to 78 — — PLL latch Transmitted data — — — — WRT-847A/847B...

  • Page 45: Block Diagram

    ..RF circuit block The oscillation circuit utilizes the PLL frequency synthe- WRT-847A/847B is comprised of the following: sizer method. The VCO (CP401) acts as an oscillator and modulator for the carrier frequency through voltage con- MB-914 board trol.
  • Page 46 WRT-847A/847B...
  • Page 47 CN-2055, DP-341, RF-96 CN-2055, DP-341, RF-96 Section 7 Board Layout RF-96 -A SIDE- SUFFIX: -11 CN-2055 DP-341 -A SIDE- -A SIDE- SUFFIX: -11 SUFFIX: -11 RF-96 -B SIDE- SUFFIX: -11 CN-2055 DP-341 -B SIDE- -B SIDE- SUFFIX: -11 SUFFIX: -11 WRT-847A/847B...
  • Page 48 MB-914 MB-914 MB-914 -A SIDE- SUFFIX: -11 MB-914 -B SIDE- SUFFIX: -11 WRT-847A/847B...
  • Page 49 C209 CT201 2.2uF 2.2uF R215 C216 C217 C218 C219 0.1uF 47uF 47uF 47pF 20pF 0.1uF 0.1uF 0.1uF 6.3V 6.3V COM0 COM3 IC201 (7/7) IC201 (6/7) IC201 (5/7) D202 IC203 GL1HY51-TE84L TC74VHCU04FT(EL) TC74VHCU04FT(EL) TC74VHCU04FT(EL) S-80827ANNP-EDQ-T2 Q201 D203 2SC4738-YGR-TE85L GL1HY51-TE84L DP-341 WRT-847A/847B...
  • Page 50 _55 dB (0 dB = 1 Vrms) and fed with AF oscillator from 10kΩ 10kΩ 1kΩ 10kΩ 10kΩ 10kΩ 1kΩ 1kΩ 1kΩ R426 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W MIC input terminal. NM:No mount RF-96 WRT-847A/847B...
  • Page 51 Reference input signal is _55 dB (0 dB = 1 Vrms) and fed with NM:No mount AF oscillator from MIC connector. For measuring points (A to J), see schematic diagram. CN-2055 Level values are referential values measured with AF level meter. MB-914 WRT-847A/847B...
  • Page 54 WRT-847A (AU) Printed in Japan Sony Corporation WRT-847B (U, CE) E 2001. 1 11 Communication System Solutions Network Company 9-976-893-01 ©2001...

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