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All manuals and user guides at all-guides.com
XR-4880
SERVICE MANUAL
AEP Model
UK Model
Photo: XR-4880
Model Name Using Similar Mechanism
XR-C6100R
Tape Transport Mechanism Type
MG-25F-136
SPECIFICATIONS
FM/MW/LW CASSETTE CAR STEREO
MICROFILM

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Table of Contents

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   Summary of Contents for Sony XR-4880

  • Page 1 All manuals and user guides at all-guides.com XR-4880 SERVICE MANUAL AEP Model UK Model Photo: XR-4880 Model Name Using Similar Mechanism XR-C6100R Tape Transport Mechanism Type MG-25F-136 SPECIFICATIONS FM/MW/LW CASSETTE CAR STEREO MICROFILM...
  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com TABLE OF CONTENTS GENERAL Location of Controls ............3 Resetting the Unit ............4 Detaching the Front Panel ..........4 Setting the Clock ............. 4 Installation ............... 5 Connections ..............6 DISASSEMBLY ............8 ASSEMBLY OF MECHANISM DECK ....
  • Page 3 All manuals and user guides at all-guides.com SECTION 1 This section is extracted from instruction manual. GENERAL – 3 –...
  • Page 4 All manuals and user guides at all-guides.com – 4 –...
  • Page 5 All manuals and user guides at all-guides.com – 5 –...
  • Page 6 All manuals and user guides at all-guides.com – 6 –...
  • Page 7 All manuals and user guides at all-guides.com – 7 –...
  • Page 8: Disassembly

    All manuals and user guides at all-guides.com SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. FRONT PANEL ASS’Y 1 Push the button (release). 2 Remove the front panel ass’y to the direction of the arrow A . COVER ASS’Y 3 Cover ass’y –...
  • Page 9 All manuals and user guides at all-guides.com SUB PANEL, MECHANISM DECK (MG-25F-136) 5 Screw (PTT2.6 × 6) 3 Connector (CN351) 6 Mechanism deck (MG-25F-136) 4 Flexible flat cable (CN301) 2 Sub panel 1 Three screws (PTT2.6 × 8) 1 Three screws (PTT2.6 ×...
  • Page 10: Assembly Of Mechanism Deck

    All manuals and user guides at all-guides.com SECTION 3 ASSEMBLY OF MECHANISM DECK Note: Follow the assembly procedure in the numerical order given. 5 Fit projection on C part. HOUSING 7 Holder the hanger by bending the claw. 2 Install the hanger onto two claws of the housing.
  • Page 11 All manuals and user guides at all-guides.com LEVER (LDG-A) / (LDG-B) Shaft A Shaft A Shaft B Shaft B Shaft C 1 Fit the lever (LDG-A) on shafts A – C and install it. 3 Type-E stop ring 2.0 2 Fit the lever (LDG-B) on shafts A and B and install it.
  • Page 12 All manuals and user guides at all-guides.com GUIDE (C) 2 Guide (C) 1 Three claws MOUNTING POSITION OF CAPSTAN/REEL MOTOR (M901) 30 ° 3 Capstan/reel motor(M901) 2 Two precision screws (P 2 × 2) 1 Belt – 12 –...
  • Page 13: Mechanical Adjustments

    All manuals and user guides at all-guides.com SECTION 5 SECTION 4 ELECTRICAL ADJUSTMENTS MECHANICAL ADJUSTMENTS 1. Clean the following parts with a denatured-alcohol-moistened TEST MODE swab: This set have the test mode function. In the test mode, FM Auto playback head pinch roller Scan/Stop Level and MW Auto Scan/Stop Level adjustments can rubber belt...
  • Page 14: Tuner Section

    All manuals and user guides at all-guides.com FM Stereo Separation Adjustment TUNER SECTION 0 dB=1 µV Setting: [SOURCE] button: FM Cautions during repair FM RF signal When the tuner unit is defective, replace it by a new one be- level meter antenna jack (J1) generator cause its internal block is difficult to repair.
  • Page 15 All manuals and user guides at all-guides.com Auto Scan/Stop Level Adjustment Make this adjustment after "FM Auto Scan/Stop Level Adjustment". Setting: [SOURCE] [MODE] button: MW 30 Ω 15 pF 65 pF AM RF signal generator AM dummy antenna (50 Ω ) antenna jack (J1) Carrier frequency : 999 kHz 30% amplitude...
  • Page 16 All manuals and user guides at all-guides.com Adjustment Location: —SET UPPER VIEW– Tape Speed Adjustment RV1 MW Auto Scan/Stop Level Adjustment RV2 FM Auto Scan/Stop Level Adjustment RV4 FM Stereo Separation Adjustment – 16 –...
  • Page 17: Diagrams

    All manuals and user guides at all-guides.com SECTION 6 DIAGRAMS • IC Block Diagrams – MAIN Board – IC301 CXA2509AQ-T4 IC21 TB2118F (EL) IC351 LB1930M-TLM BUFFER 24dB 24 23 22 21 16 15 14 13 OUT1 MOTOR 120µ/70µ CONTROL DRIVE CIRCUIT + –...
  • Page 18: Printed Wiring Board -main Section

    All manuals and user guides at all-guides.com XR-4880 • Semiconductor 6-1. PRINTED WIRING BOARD — MAIN SECTION — Location Ref. No. Location E-12 E-11 D351 I-12 D352 G-13 D501 D551 F-12 D552 F-12 D553 D554 F-12 D571 D-10 D572 D-10...
  • Page 19: Schematic Diagram -main (1/2) Section

    All manuals and user guides at all-guides.com XR-48 6-2. SCHEMATIC DIAGRAM — MAIN (1/2) SECTION — • Refer to page 17 for IC Block Diagrams. • Refer to page 29 for IC Pin Function Description. FAE342-E01 • Waveforms 2.8Vp-p (FL) 18.432MHz IC501 !™...
  • Page 20: Schematic Diagram -main (2/2) Section

    All manuals and user guides at all-guides.com XR-4880 6-3. SCHEMATIC DIAGRAM — MAIN (2/2) SECTION — • Refer to page 17 for IC Block Diagrams. • Refer to page 19 for Printed Wiring Board. (Page 21, 22) Note on Schematic Diagram: •...
  • Page 21: Printed Wiring Board -panel Section

    All manuals and user guides at all-guides.com XR-48 • Semiconductor 6-4. PRINTED WIRING BOARD — PANEL SECTION — Location Ref. No. Location D902 B-12 D903 B-12 D904 B-11 D951 Q941 Q942 Q943 Q944 Q945 (Page 19) • Semiconductor Location Note: •...
  • Page 22: Schematic Diagram -panel Section

    All manuals and user guides at all-guides.com XR-4880 6-5. SCHEMATIC DIAGRAM — PANEL SECTION — • Refer to page 25 for Printed Wiring Board. (Page 23) Note on Schematic Diagram: • Power voltage is dc 14.4V and fed with regulated dc power •...
  • Page 23: Ic Pin Function Description

    All manuals and user guides at all-guides.com 6-6. IC PIN FUNCTION DESCRIPTION • IC501 MASTER U-COM (MN101C12GTC1) Pin No. Pin Name Function VREF- – Basic voltage (- side) of AD conversion input FM/AM common signal meter A/D conversion input terminal KEYIN1 KEY (AD conversion) input KEYIN0...
  • Page 24 All manuals and user guides at all-guides.com Pin No. Pin Name Function Not used AMSON “L” is output in AMS mode N/R-OUT FWD/REV control output MTLON Metal control input/output TAPMUT Tape mute control output DOLON Dolby control input/output AMSIN Input to detect existence of song during AMS mode 57 to 75 Not used Combination stereo input and monaural output...
  • Page 25: Exploded Views

    All manuals and user guides at all-guides.com SECTION 7 EXPLODED VIEWS NOTE: • The mechanical parts with no reference number in • -XX, -X mean standardized parts, so they may have the exploded views are not supplied. some difference from the original one. •...
  • Page 26 All manuals and user guides at all-guides.com (2) FRONT PANEL SECTION not supplied (KEY board) LCD901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-030-838-11 BUTTON (RELEASE) * 61 3-030-839-01 SHEET (REFLECTOR) 3-030-832-11 LEVER (S/A) 3-932-475-01 SPRING (RELEASE) * 62 3-030-824-01 PLATE, LIGHT GUIDE 3-030-834-01 BUTTON (M/S)
  • Page 27 All manuals and user guides at all-guides.com (3) MECHANISM DECK SECTION (MG-25F-136) HP901 M901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-3291-667-A CLUTCH (FR) ASSY 3-933-346-01 CATCHER 3-019-130-01 LEVER (LDG-A) 3-933-344-01 GUIDE (C) 3-019-131-01 LEVER (LDG-B) 3-014-798-01 SCREW (HEAD), SPECIAL 3-020-539-01 SPRING (LD-1), TENSION 3-364-151-01 WASHER...
  • Page 28: Electrical Parts List

    All manuals and user guides at all-guides.com SECTION 8 ELECTRICAL PARTS LIST Note: • SEMICONDUCTORS • Due to standardization, replacements in the parts list When indicating parts by reference In each case, u: µ , for example: may be different from the parts specified in the number, please include the board diagrams or the components used on the set.
  • Page 29 All manuals and user guides at all-guides.com MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R964 1-216-033-00 METAL CHIP 1/10W 1-163-017-00 CERAMIC CHIP 0.0047uF 5% 1-163-809-11 CERAMIC CHIP 0.047uF R965 1-216-037-00 METAL CHIP 1/10W R966 1-216-033-00 METAL CHIP 1/10W 1-109-982-11 CERAMIC CHIP...
  • Page 30 All manuals and user guides at all-guides.com MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C284 1-164-489-11 CERAMIC CHIP 0.22uF C789 1-163-077-00 CERAMIC CHIP 0.1uF C301 1-124-234-00 ELECT 22uF C790 1-163-077-00 CERAMIC CHIP 0.1uF C303 1-163-251-11 CERAMIC CHIP 100PF C304...
  • Page 31 All manuals and user guides at all-guides.com MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < FUSE > JC611 1-410-501-11 INPUCTOR CHIP 2.2uH F781 1-532-877-11 FUSE (BLADE TYPE)(AUTO FUSE)(10A) JC621 1-216-296-00 SHORT JC622 1-216-296-00 SHORT <...
  • Page 32 All manuals and user guides at all-guides.com MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-249-417-11 CARBON 1/4W F R353 1-216-065-00 RES,CHIP 4.7K 1/10W 1-249-417-11 CARBON 1/4W F R354 1-216-073-00 METAL CHIP 1/10W R501 1-216-097-00 RES,CHIP 100K 1/10W 1-249-417-11 CARBON...
  • Page 33 All manuals and user guides at all-guides.com MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R574 1-216-081-00 METAL CHIP 1/10W ACCESSORIES & PACKING MATERIALS R581 1-216-089-00 RES,CHIP 1/10W ******************************* R590 1-216-246-00 RES,CHIP 100K 1/8W 3-865-670-11 MANUAL, INSTRUCTION R591 1-216-089-00 RES,CHIP 1/10W...
  • Page 34 All manuals and user guides at all-guides.com XR-4880 Sony Corporation 99B097542-1 Personal & Mobile Communication Company 9-926-408-11 Printed in Hungary © 1999. 2 – 40 – Published by Quality Assurance Dept.
  • Page 35 All manuals and user guides at all-guides.com www.s-manuals.com...

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