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Panasonic RQ-SX77V Service Manual

Stereo radio cassette player
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AD0004074C1
A1
Stereo Radio Cassette Player
RQ-SX77V
AR10 Mechanism Series
Colour
(S)...............Silver Type
Area
(P)...............U.S.A.
<Note>
Please dispose of the service manual for Model No.
RQ-SX77V(P) TENTATIVE, Order No. AD0002039A1
and use this service manual.
SPECIFICATIONS

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Summary of Contents for Panasonic RQ-SX77V

  • Page 1 AD0004074C1 Stereo Radio Cassette Player RQ-SX77V AR10 Mechanism Series Colour (S)....Silver Type Area (P)....U.S.A. <Note> Please dispose of the service manual for Model No. RQ-SX77V(P) TENTATIVE, Order No. AD0002039A1 and use this service manual. SPECIFICATIONS...

  • Page 2: Location Of Controls

    2000 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. 1. Accessories - Battery charger (RP-BC156BPY)......1pc. - Stereo headphones (RFEV711P-KY)......1pc. - Remote controller (RFEV012P-KS)......1pc. - Rechargeable battery (with case) (RP-BP61PYS11).......1pc. - Dry cell battery case (RFAT0002-H)......1pc.

  • Page 3: Service Mode

    3. Service Mode The RQ-SX77V has a Service mode designed to help identify faulty parts in the event of an error. / This mode is especially useful when servicing is carried out. Items required - Stereo earphones or stereo headphones...
  • Page 4 Operation switches...
  • Page 5 3.2. Amplifier test This test is required if the amplifier is found to be malfunctioning thorough 3.1. Unit and stereo earphone test. Preparations: See 3.1. Unit and stereo earphone test.
  • Page 6 4. Mechanism Block Replacement Procedure...
  • Page 7 4.1. Replacing the tape transport assembly The tape transport mechanism is supplied semi-assembled. Configuration: Tape transport mechanism excluding the head block assembly, capstan motor and capstan belts (1) and (2). When replacing the tape transport assembly, first remove the [1] head block assembly, [2] motor, [3] capstan belt (1) and [4] capstan belt (2) from the assembly to be replaced, then install these parts <[1] - [4]>...

  • Page 8: Operation Checks And Component Replacement Procedures

    Note: After replacing, perform tape speed adjustment. 4.2. Replacing the head block assembly The head block assembly is supplied semi-assembled. Configuration: Head block assembly with head arm spring and pinch roller arm assembly (F) and (R). The head arm spring and pinch roller arm assembly (F) and (R) will also be supplied separately from the head block assembly.
  • Page 9 5.1. Checking for the main P.C.B. 5.1.1. Checking for the main P.C.B. / (A side) - Check the main P.C.B. (A side) as shown below.
  • Page 10 5.1.2. Checking for the main P.C.B. / (B side) - Follow the (Step 1) - (Step 5) of item 5.1.1. - Check the main P.C.B. (B side) as shown below.
  • Page 11 5.2. Replacement for the motor and capstan belt - Follow the (Step 1) - (Step 5) of item 5.1.1.
  • Page 13 5.3. Replacement for the cassette lid ass’y - Follow the (Step 1) - (Step 5) of item 5.1.1.
  • Page 14 5.4. Replacement for the head block ass’y - Follow the (Step 1) - (Step 5) of item 5.1.1.
  • Page 16 6. Block Diagram 7. Check Point of Signal 8. Type Illustration of ICs, Transistors and Diodes 9. Schematic Diagram Notes - This schematic diagram may be modified at any time with the development of new technology. Notes: S13-1: Cassette half detect switch / (IN...ON, OUT...OFF) S13-2: Tape select switch / (NORMAL...ON, METAL/CrO2...OFF) S301:...
  • Page 26 FWD/REV/STOP detect switch S302: Hold switch (HOLD) S312: Radio/band select switch (RADIO/BAND) S313: FF/tuning + switch (FF/+) S314: REW/tuning - switch (REW/-) S316: Sound select / battery condition check switch (SOUND SEL/BATT) S317: Tuning mode select switch / (TUNING MODE) S318: Playback / direction switch ( S336:...

  • Page 27: Schematic Diagram

    Volume min.: Radio (FM).......47mA Radio (AM).......37mA Tape (FWD Playback).....36mA Volume max.: Radio (FM).......51mA Radio (AM).......41mA Tape (FWD Playback).....41mA - Voltage and signal line : Positive voltage line : FM signal line : FM OSC signal line : AM OSC signal line : FM/AM Vcap signal line : Tape playback signal line : Main signal line...
  • Page 28 11. Printed Circuit Board Diagram 12. Terminal Function of ICs 12.1. IC3 (TC9328F206BS): / System Control / LCD drive Function Terminal Name COM1 LCD common signal output COM4 LCD segment signal output Not used, open EEPROM CS output EEPROM serial clock output DI/O I/O EEPROM data input/output 24 NO USE...
  • Page 29 Function Terminal Name 43 DATA Remote control signal input Tape end detect signal input Not used, connected to GND 46 TPS IN XBS control signal input 48 FM OSC FM OSC signal input FM OSC signal input Power supply 51 SWITCH Not used, open Tune frequency control signal output...

  • Page 30: Measurements And Adjustments

    Function Terminal Name LCD power booster control LCD power booster control LCD power booster control LCD power booster control LCD power booster control 80 VLCD LCD power booster control 13. Measurements and Adjustments 13.1. Preparation for Adjustment Follow step1 to step 6 in item on “Checking for the main P.C.B. (A side)” for Operation Checks and Component Replacement Procedures.
  • Page 31 the loop antenna of receiver. 2. Connect the oscilloscope to headphones jack. / Refer to Fig. 13-2. 3. Set the unit to AM mode. 4. Set AM-SG to 594 kHz. 5. Receive 594 kHz in the unit. 6. Adjust L202 for maximum output. 7.
  • Page 32 Adjustment Point 14. Supply of Rechargeable Battery as Replacement Parts Please take note of the following points relating to Carrying Case to be used for protection of Rechargeable Battery from shorting. Replacement Parts: - Rechargeable Battery (RP-BP61PYS11) to be supplied will be provided with Carrying Case (RFAT0001-H) - No replacement parts will be supplied for Rechargeable Battery without Carrying Case.

  • Page 33: Replacement Parts List

    15. Caution in use of Rechargeable Battery - Take Rechargeable Battery out of Carrying Case and use it. - Be sure to carry Rechargeable Battery in this Carrying Case. / If not, may either heat or ignite by shorting with a metal. 16.
  • Page 34 supplied by TAMACO. Ref. No. Part No. Part Name & Description Remarks RHD14057-S SCREW (TAMACO) RHD14059-S SCREW RKK0127-1S BATTERY COVER RHQ0032-S SCREW (TAMACO) RHQ0062-S SCREW (TAMACO) RXMT0002 LINK UNIT (TAMACO) ZA5SX77VP-S CASSETTE LID UNIT (TAMACO) ZA6SX30-S HINGE UNIT (TAMACO) RGU1753-1S BUTTON,PLAY/STOP ETC RGU1754-H BUTTON,TUNING MODE...
  • Page 35 Ref. No. Part No. Part Name & Description Remarks ECUVNA105ZFV 10V 1U ECUE1H222KBQ 50V 2200P ECUVNA105ZFV 10V 1U ECST0GY685R 4V 6.8U ECUVNA224KBV 10V 0.22U ECUVNA105ZFV 10V 1U ECUVNC104KBV 16V 0.1U ECUE1C103KBQ 16V 0.01U RCST0GX107RG 4V 100U (TAMACO) ECST0GY226R 4V 22U C103 ECUV1H391GCV 50V 390P...
  • Page 36 Ref. No. Part No. Part Name & Description Remarks C304 ECUE1C104ZFQ 16V 0.1U C307 ECST0GY106R 4V 10U C308-11 ECUENJ104KBQ 6.3V 0.1U C312 ECUE1C104ZFQ 16V 0.1U C313,14 ECUE1H050DCQ 50V 5P C316 ECUE1H221KBQ 50V 220P C317 ECUE1C223KBQ 16V 0.022U C320 ECUE1E472KBQ 25V 4700P C326 RCST0EX157RG 2.5V 150U...
  • Page 37 Ref. No. Part No. Part Name & Description Remarks C604 ECST0GY475RR 4V 4.7U C605 ECUENJ104KBQ 6.3V 0.1U C606-08 ECUE1C103KBQ 16V 0.01U C702,03 ECUE1H101KBQ 50V 100P C704 ECUV1A475ZFN 10V 4.7U C710 RCST0EY686RG 2.5V 68U C720 RCST0EY686RG 2.5V 68U C750 ECST0EX107R 2.5V 100U CF101 RLFFECNN01AL CERAMIC FILTER...
  • Page 38 Ref. No. Part No. Part Name & Description Remarks DTC143ZETL TRANSISTOR 2SB815B7TX TRANSISTOR 2SD1048X7TX TRANSISTOR 2SD1328STXRA TRANSISTOR DTA143ZETL TRANSISTOR Q102 UN9210TX TRANSISTOR Q104 UN9210TX TRANSISTOR Q106 2SC3935TX TRANSISTOR Q151 2SK1067-4-TL TRANSISTOR Q152,53 2SD2216STX TRANSISTOR Q201 2SK1067-4-TL TRANSISTOR Q206 UN9115TX TRANSISTOR Q207 UN9110TX TRANSISTOR...
  • Page 39 Ref. No. Part No. Part Name & Description Remarks R220 ERJ2GEJ331X 1/4W 330 R225,26 ERJ2GEJ563X 1/4W 56K R227 ERJ2GEJ332X 1/4W 3.3K R301,02 ERJ2GEJ474X 1/4W 470K R303 ERJ2GEJ391X 1/4W 390 R304 ERJ2GEJ473X 1/4W 47K R305 ERJ2GEJ102X 1/4W 1K R306 ERJ2GEJ103X 1/4W 10K R313 ERJ3GEYD103V 1/16W 10K...

  • Page 40: Cabinet Parts Location

    Ref. No. Part No. Part Name & Description Remarks RJ70,71 ERJ2GE0R00X CHIP JUMPER RSH1B011-5U SW,TAPE DET. (TAMACO) S301 RSS2A012-1A SW,MECHANISM DET. (TAMACO) S302 RSS2A010-1A SW,HOLD S312-14 EVQPLMA15 SW,PUSH (TAMACO) S316,17 RSG0038-P SW,PUSH S318 EVQPLMA15 SW,PLAY (TAMACO) S336 EVQPLMA15 SW,STOP/OFF (TAMACO) EVUTUGB15A54 V.R,VOLUME VR601...

  • Page 41: Mechanism Parts Location

    18. Mechanism Parts Location...
  • Page 42 19. Packaging...
  • Page 43 F000401035MT/KH...