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SERVICE MANUAL
For RM-X4S (Remote Commander),
please refer to RM-X4S Service Manual
(9-925-698-∏) previously issued.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol a are trade-
marks of Dolby Laboratories Licensing Corporation.
MICROFILM
XR-C6090
Photo: XR-5800R
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
SPECIFICATIONS
FM/AM CASSETTE CAR STEREO
E Model
XR-C450
MG-25J-136

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Summary of Contents for Sony XR-C6090

  • Page 1 XR-C6090 SERVICE MANUAL E Model For RM-X4S (Remote Commander), please refer to RM-X4S Service Manual (9-925-698-∏) previously issued. Photo: XR-5800R Dolby noise reduction manufactured under license Model Name Using Similar Mechanism XR-C450 from Dolby Laboratories Licensing Corporation. Tape Transport Mechanism Type MG-25J-136 “DOLBY”...
  • Page 2: Table Of Contents

    TABLE OF CONTENTS Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270 ˚C dur- ing repairing. GENERAL • Do not touch the soldering iron on the same conductor of the Location of Controls ............3 circuit board (within 3 times).
  • Page 3 SECTION 1 This section is extracted from instruction manual. GENERAL – 3 –...
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  • Page 8: Disassembly

    SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. FRONT PANEL ASS’Y, COLLAR 4 collar 3 claw 1 Push the button (release). 3 claw 2 Remove the front panel ass’y to the direction of the arrow A . COVER ASS’Y 3 cover ass’y –...
  • Page 9 SUB PANEL, MECHANISM DECK (MG-25J-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 × 8) 5 three screws (PTT 2.6 ×...
  • Page 10: Assembly Of Mechanism Deck

    SECTION 3 ASSEMBLY OF MECHANISM DECK Note: Follow the assembly procedure in the numerical order given. HOUSING 7 Holder the hanger by bending the claw. 5 Fit projection on C part. 1 Install the catch to the hanger. 2 Install the hanger onto two claws of the housing.
  • Page 11 LEVER (LDG-A) / (LDG-B) shaft A shaft A shaft B shaft C shaft B 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 GUIDE (C) 2 guide (C) 1 three claws – 12 –...
  • Page 13: Mechanical Adjustments

    SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL ADJUSTMENTS 1. Clean the following parts with a denatured-alcohol-moistened Adjustment Location: TAPE DECK SECTION 0 dB=0.775 V swab: playback head pinch roller Tape Speed Adjustment rubber belt capstan Setting: – SET UPPER VIEW – idler speed checker 2.
  • Page 17 • IC Block Diagrams – MAIN Board – IC1 BU2624F-E2 XOUT PHASE REFERENCE DIVIDER MAIN FMIN PRESCALER COUNT SHIFT REGISTER LATCH AMIN IF COUNT 20BIT COUNT IFIN IC161 LC75373ED – LFIN – – – LFOUT – LSELO LROUT – – –...
  • Page 18 IC301 CXA2510AQ-T4 IC361 LB1638M N.C. OUT1 120µ/ 70µ + – MSMODE – OUT2 NR BIAS PBFB1 DRSW MODE PBRIN1 TAPE/AUX TAPESW N.C. PBREF1 INSW TAPE EQ PBFIN1 NRSW MODE FWD/RVS PBGND MS ON/ DETECT – MSOUT PBFIN2 PBREF2 DGND PBRIN2 PBFB2 MSTC OFF/B...
  • Page 19: 6-5. Ic Pin Function Description

    Serial data transfer clock signal output to the bus interface (IC701) (for SONY bus) BUSON Bus on/off control signal output to the bus interface (IC701) (for SONY bus) “L”: bus on SYSRST Reset signal output to the bus interface (IC701) (for SONY bus) “L”: reset AMPON Standby control signal output to the power amplifier (IC611) “L”: standby...
  • Page 20 Pin No. Pin Name Function Loading/tape operation motor control signal output to the LB1638M (IC361) LM EJ (For the eject direction and reverse side operation) *1 Forward/reverse direction control signal output to the CXA2510Q (IC301) N/R OUT “L: forward direction, “H”: reverse direction P.ON Polar stereo detection signal output terminal “H”: polar stereo Not used (open) CM ON...
  • Page 21 Pin No. Pin Name Function Input of acknowledge signal for the key entry Acknowledge signal is input to accept function KEYACK and eject keys in the power off status On at input of “H” — Power supply terminal (+5V) X OUT Main system clock output terminal (5 MHz) X IN Main system clock input terminal (5 MHz)
  • Page 22: Exploded Views

    SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they are seldom required for routine service. Some may have some difference from the original one. delay should be anticipated when ordering •...
  • Page 23 (2) FRONT PANEL SECTION not supplied (KEY board) LCD901 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-018-930-01 KNOB (D-BASS) 3-010-387-01 BUTTON (PRESET) (6. 1. 2. 3. 4. 5. 6. DSPL) * 52 3-014-859-01 SHEET (LCD) (T) 3-010-390-01 BUTTON (L.L.D) (LCL.
  • Page 24 (3) MECHANISM DECK SECTION (MG-25J-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 * 152 3-019-130-01 LEVER (LDG-A) 3-933-344-01 GUIDE (C) * 153 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 3-020-540-01 SPRING (LD-2), TENSION...
  • Page 25: Electrical Parts List

    SECTION 8 ELECTRICAL PARTS LIST NOTE: When indicating parts by reference • Due to standardization, replacements in the • Items marked “*” are not stocked since they number, please include the board. parts list may be different from the parts speci- are seldom required for routine service.
  • Page 26 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R927 1-216-057-00 METAL CHIP 2.2K 1/10W 1-164-232-11 CERAMIC CHIP 0.01uF R928 1-216-061-00 METAL CHIP 3.3K 1/10W 1-164-232-11 CERAMIC CHIP 0.01uF R929 1-216-065-00 METAL CHIP 4.7K 1/10W R930 1-216-069-00 METAL CHIP 6.8K 1/10W...
  • Page 27 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C312 1-164-489-11 CERAMIC CHIP 0.22uF * CN302 1-506-995-11 PIN, CONNECTOR (PC BOARD) 13P C313 1-164-232-11 CERAMIC CHIP 0.01uF CN601 1-774-701-11 PIN, CONNECTOR 16P C315 1-164-004-11 CERAMIC CHIP 0.1uF CN631 1-764-422-11 PLUG, CONNECTOR 12P...
  • Page 28 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC161 8-759-443-67 IC LC75373ED JC203 1-216-295-00 SHORT IC301 8-752-079-79 IC CXA2510AQ-T4 JC204 1-216-295-00 SHORT IC361 8-759-823-87 IC LB1638M IC501 8-759-522-61 IC uPD78058GC-F58-3B9 JC206 1-216-295-00 SHORT JC207 1-216-295-00 SHORT IC611 8-759-490-74 IC TDA7384 JC227...
  • Page 29 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R172 1-216-017-00 RES, CHIP 1/10W R522 1-216-097-00 RES, CHIP 100K 1/10W R173 1-216-073-00 METAL CHIP 1/10W R523 1-216-246-00 RES, CHIP 100K 1/8W R174 1-216-073-00 METAL CHIP 1/10W R175 1-216-081-00 METAL CHIP 1/10W...
  • Page 30 XR-C6090 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < SWITCH > PARTS FOR INSTALLATION AND CONNECTIONS *************************************** S501 1-571-478-11 SWITCH, SLIDE (POWER SELECT) S502 1-571-478-11 SWITCH, SLIDE (FREQUENCY SELECT) 3-916-161-31 FRAME ASSY S503 1-692-431-21 SWITCH, TACTILE (RESET) X-3370-077-1 SCREW ASSY (AE.KEY), FITTING...

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