JVC KS-FX725R Block diagram

ABC

KS-FX725R

2-1

Block diagram

IC801

BUFFER

HD74HC126FP-X

HEAD

IC401

PB EQ

CXA2559Q

IC301

POWER AMP.

LA4743K

IC161

E.VOLUME

TEA6320T-X

IC701

UPD178018AGC623

MAIN SYSTEM CONTROL CPU

TU1

AM/FM TUNER PACK

QAU0260-001

SUB

MOTOR

IC402

DC MOTOR DRIVER

LB1641

LCD1

QLD0158-002

IC651

LCD DRIVER

LC75823W

KEY

S601 – S620

MAIN

MOTOR

SWITCH

TAPE END.STANDBY

SEEK/STOP

SD/ST

SMETER

JBUS SI

JBUS SO

JBUS I/O

JBUS SCK

SCK

SI/SO

CD RCH

CD LCH

TUNER L/R

OUT LR

OUT RR

OUT LF

OUT RF

L/R F

L/R R LRO

RRO

CP401

J801 CP901 J321

KEY 0 – 2

CJ601

S3 – S52

COM0 – COM3

CP701

TAPE L/R

F/R

MODE

STANDBY

FF/REW

MOTOR

SUBMO

TAPE IN

DOLBY

REEL

SUBMO+

SUBMO-

LCH

RCH METAL

DOLBY

CLOCK

F/R

MS OUT

LCH

RCH

FF/REW

MOTOR

TAPE IN

MODE

STANDBY

REEL

PHOTO

CJ401

CJ403 CJ402

TO CD CHANGER TO SPEAKER

CONNECTOR TO REAR LINE OUT

Tuner.Power AMP.Changer/System Controller LCD DRIVER/KEY SWITCH CIRCUT

MECHANISM CONTROL

Contents

Main SERVICE MANUAL CASSETTE RECEIVER KS-FX725R KS-FX725R Contents Page Disassembly method Removing the heat sink (See Fig.4) Removing the bottom cover (See Fig.5 , 6) AA Page Removing the control switch board (See Fig.10 ~ 12) G G GG KS-FX725R Removing the reinforce bracket (See Fig.1 and 2) Removing the head board (See Fig.4) Removing the cassette guide (See Fig.3) B A Removing the cassette hanger assembly / cassette holder (See Fig.6 to 9) Removing the load arm (See Fig.5) Removing the side bracket assembly (See Fig.10 to 12) C Removing the pinch arm (F) assembly (See Fig.13 and 14) Removing the pinch arm (R) assembly (See Fig.13 and 15) Removing the slide chassis assembly (See Fig.16 and 17) Removing the head / tape guide (See Fig.18 and 19) Removing the flywheel assembly (F) & (R) (See Fig.20 and 21) D Disassembling the flywheel assembly (F) (See Fig.22 and 23) Disassembling the flywheel assembly (R) (See Fig.22 and 24) Removing the reel board (See Fig.25 and 26) E E Removing the gear base arm / gear base link assembly (See Fig.27 to 29) Removing the FFC pad (See Fig.27 and 29) Removing the mode gear (See Fig.30 and 33) Removing the mode rack assembly (See Fig.31 and 32) Removing the direction link / direction plate (See Fig.31 to 33) Removing the mode switch actuator (See Fig.30, 31 and 33) Removing the gear base assembly / take up gear / reflector gear (See Fig.34 to 36) Removing the reel driver / reel spindle (See Fig.36) Removing the side bracket assembly (See Fig.37 to 41) Removing the main motor assembly / sub motor assembly (See Fig.42 to 44) F G GF Adjustment method Test instruments reqired for adjustment Measuring conditions(Amplifier section) Standard volume position Arrangement of adjusting & test points Arrangment of adjusting Head amplifier board section (Reverse side) Information for using a car audio service jig Disassembly method Item Conditions Adjustment and Confirmation methods S.Values Adjust Description of major ICs UPD178018AGC584(IC701) : System controller micon No. 2.Description 24 1 41 64 HA13158A (IC941) : Power amp CXA2559Q(IC401):Playback equalizer amplifier with music sensor 1.Pin layout 2.Blockdiagram 40 31 11 20 1 10 KS-FX725R 3.Pin function HA13164(IC961):REGULATOR SAA6579T-X(IC761):RDS Detector TEA6320T-X (IC911) : E.volume 1.Pin layout 3.Pin functions Functions Functions 2.Block diagram LC75823E (IC651) : LCD Driver See Function Table HD74HC126FP-X (IC751) : Buffer LB1641 (IC402) : DC motor driver ABC 2-1 Block diagram Page Standard schematic diagrams Receiver & System control section ABCD E F G 2-3 Mecha control circuit section Cassette signal 2-4 HABC DE FG KS-FX725RKS-FX725R LCD driver & Operation switch section ABCD E F G 2-5 HABC DE FG KS-FX725RKS-FX725R Printed circuit boards Main board Front board(Forward side) PARTS LIST - Contents - [ KS-FX725R ] 3-2 Exploded view of general assembly and parts list B board Block No. MM M 1 A 3-3 Parts list (General assembly) Block No. M1MM A 3-4 Parts list (General assembly) Block No. M1MM A 3-5 Cassette mechanism assembly and parts list Block No. P CDS-802JE1 A 3-6 Parts list (Cassette mechanism) Block No. MPMM A 3-7 Parts list (Cassette mechanism) Block No. MPMM Grease point 1/2 Grease point 2/2 3-10 3-11 3-12 3-13 Item Parts number Parts name Ar ea Electrical parts list (Mecha control board) Remarks 3-14 Electrical parts list (Front board) Block No. 03 Page Packing materials and accessories parts list A 3-17 Parts list (Packing) A Block No. M3MM Parts list (Accessories) Block No. M5MM CASSETTE RECEIVER KS-FX725R/KS-F525 KS-FX725R KS-F525 5 . . . , . (C 19 22). : (FM1 3, AM). . : (FM1 3, AM). , , M. FM: 8 FM: SSM FM (FM 1 3), FM. 2 . AM RDS RDS (- ) PTY PTY RDS 14 FM 3 2 (PS NAME) (FREQ) (PTY) (CLOCK) PTY 16 . . 17 , . 19 , . VOL LOUD BAS , . / BEAT SOFT POP SCM OFF (PSM) (PSM) 25 Advanced SCM ( SCM ) - ( KS-FX725R) 27 - - - 28 - ( ) ( ) RPT1 RPT2 RND1 RND2 30 FM/AMDAB DAB DAB? 31 . , . - : FM/AM DAB DAB 34 35 : Page ( ) V INSTALLATION (IN-DASH MOUNTING) KS-FX725R/KS-F525 Installation/Connection Manual / When using the optional stay ELECTRICAL CONNECTIONS : A Typical Connections / PRECAUTIONS on power supply and speaker connections: n B CD changer and DAB tuner / - - DAB External component / CASSETTE RECEIVER KS-FX725R/KS-F525 CONTENTS LOCATION OF THE BUTTONS Control panelKS-FX725R LOCATION OF THE BUTTONS Control panelKS-F525 5 Adjust the volume. Adjust the sound as you want. (See pages 19 22.) BASIC OPERATIONS Turning on the power Turn on the power. Select the source. 6 RADIO BASIC OPERATIONS Listening to the radio FM1 FM2 FM3 Searching a station automatically: Auto search Select the band (FM1 3, AM). Searching a station manually: Manual search Select the band (FM1 3, AM). Press and hold or 4 until M (manual) starts flashing on the display . T une in to a station you want while M is flashing. When an FM stereo broadcast is hard to receive: Storing stations in memory FM station automatic preset: SSM Tuning in to a preset station Scanning broadcast stations 10 RDS OPERATIONS Mode 1 Mode 2 Mode 3 What you can do with RDS Tracing the same programme automatically (Network-Tracking Reception) PTY Standby Reception Using Standby Reception TA Standby Reception Selecting your favorite programme for PTY Standby Reception Searching your favorite programme To store your favorite programme types To search your favorite programme type Other convenient RDS functions and adjustments Automatic selection of the station when using the number buttons 14 Changing the display mode while listening to an FM station 2 3 Setting the TA volume level 2 PTY codes 16 Listening to a cassette Insert a cassette into the cassette compartment. Select the tape direction. TAPE OPERATIONS To stop play and eject the cassette To fast-forward and rewind a tape 17 Prohibiting cassette ejection Finding the beginning of a tune Specify how many tunes ahead of or before the current tune the one you want is located. Notes: Other convenient tape functions Skipping the blank portions on the tape Playing the current tune repeatedly 19 Select the item you want to adjust. SOUND ADJUSTMENTS Adjusting the sound Adjust the level. VOL LOUD Turning on/off the loudness function Using the sound control memory Selecting and storing the sound modes Select the sound mode you want. BEAT SOFT POP SCM OFF Recalling the sound modes When SCM LINK is set to LINK ON, select the source. Notes: Storing your own sound adjustments To reset to the factory settings Setting the clock OTHER MAIN FUNCTIONS Changing the general settings (PSM) Basic Procedure 24 Adjust the PSM item selected. Preferred Setting Mode (PSM) items 25 T o select the telephone muting To select the external component to use T o cancel Advanced SCM T o select the changer display ( T o select the level meter Detaching the control panel Detaching the control panel Attaching the control panel 27 Playing CDs CD CHANGER OPERATIONS Selecting CD playback modes To play back tracks at random (Random Play) To play back tracks repeatedly (Repeat Play) To go to the next track or the previous tracks To go to a particular disc directly EXTERNAL COMPONENT OPERATIONS Playing an external component 30 What is DAB system? Tuning in to an ensemble and one of the services DAB TUNER OPERATIONS FM/AMDAB 31 Clock time Service name Ensemble name Band/Preset number Select a service you want to listen to. To change the display information while tuning in to an ensemble To tune in to a particular ensemble without searching: To restore the FM/AM tuner Start searching an ensemble. Storing DAB services in memory Tuning in to a preset DAB service 34 Remedies Symptoms Causes 35 Remedies Causes Symptoms To clean the head MAINTENANCE Ignition key-off release/Ignition key-on play CAUTION: SPECIFICATIONS AUDIO AMPLIFIER SECTION TUNER SECTION CASSETTE DECK SECTION GENERAL Page ( ) V INSTALLATION (IN-DASH MOUNTING) KS-FX725R/KS-F525 Installation/Connection Manual / When using the optional stay ELECTRICAL CONNECTIONS : A Typical Connections / PRECAUTIONS on power supply and speaker connections: n B CD changer and DAB tuner / - - DAB External component /