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KS-LX200R
KS-LX200R
SERVICE MANUAL
CASSETTE RECEIVER
KS-LX200R
Area Suffix
E Continental Europe
EX Central Europe
E
S L 7 8 9 10 11 12 O F
F
KS-LX200R
Contents
Safety precaution 1-2
Disassembly method 1-3
Adjustment method 1-13
Description of major ICs 1-17
This service manual is printed on 100% recycled paper.
No.49573
1-1
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
Oct. 2000
KS-LX200R
Safety precaution
! Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
1-2
KS-LX200R
Disassembly method Bottom cover
Removing the top chassis
(See Fig.1 to 5)
1. Remove the two screws A attaching the bottom
cover to the top chassis on the bottom of the body. A
2. Remove the two screws B attaching the top chassis A
on both sides of the body.
3. Remove the screw C and the three screws D
attaching the heat sink on the left side of the body.
4. Remove the two screws E and the screw F on the Fig.1
back of the body.
5. Remove the two screws G on the upper side of the
body. Top chassis
6. Move the top chassis upward and disconnect the
cassette mechanism connector from the main board
connector by pulling it. Remove the top chassis from
the body.
B
Fig.2
C Top chassis
Heat sink
D B
Fig.3
Top chassis
E F
G
G
Fig.5 Fig.4
1-3
KS-LX200R
Removing the main board assembly Main board assembly
(See Fig.6 to 8) CN504
Prior to performing the following procedure, remove
the top chassis.
CN503 Bracket (L)
1. Remove the screw S attaching the bracket (L).
CN701
2. Disconnect the flexible harness from connector
CN701, the card wire from CN702 on the main board
H H
and the harness from CN503 and CN504 S
respectively.
H
3. Remove the three screws H attaching the main Joint a
board assembly to the bottom cover on the upper Joint a
side of the body. CN702
Front panel assembly
4. Remove the screw I attaching the rear panel and the Fig.6
bottom cover on the back of the body. Move the
main board in the direction of the arrow and release
the two joints a. (At this point, the main board can be
removed with the rear panel and the rear heat sink.)
5. Remove the screw J and the two screws K attaching
the rear heat sink on the back of the body.
6. Remove the two screws L and the screw M attaching
the rear panel. Now, the main board assembly will be e
removed.
ATTENTION: When reassembling, correctly engage the
switch S561 and S562 on the main board
with the part e of the operation assembly
(Refer to Fig.7, 18 and 19).
Main board S652 S651
Fig.7
M Rear heat sink
L J
L
Rear panel
K I
Fig.8
1-4
KS-LX200R
Removing the front panel assembly Main board assembly
(See Fig.9 to 11)
Prior to performing the following procedure, remove
the top chassis assembly.
1. Disconnect the flexible harness from connector CN701
CN701 on the main board assembly.
2. Remove the four screws N attaching the front panel
assembly on both sides of the body. Remove the
front panel toward the front.
Front panel assembly
Fig.9
Front panel assembly Front panel assembly
N N
CN701
Fig.11 Fig.10
Joints b
Removing the Front Board (See Fig.12)
Prior to performing the following procedure, remove
the top chassis assembly and the front panel O O
assembly.
1. Remove the four screws O attaching the front board
on the back of the front panel assembly and release Joints b
the eight joints b.
Fig.12
1-5
KS-LX200R
Removing the lifter unit (See Fig.13)
Prior to performing the following procedure, remove
the top chassis assembly and the front panel
assembly.
1. Disconnect the harness from connector CN503 and CN503
CN504
CN504 on the main board.
2. Remove the four screws P and detach the lifter unit P
from the bottom cover. P
Removing the feed motor (L) (See Fig.14)
Prior to performing the following procedure, remove
the lifter unit. Lifter unit assembly
Fig.13
1. Remove the washer attaching the clutch assembly
and detach the clutch assembly from the shaft of the
lifter unit.
Lifter unit assembly
2. Remove the two screws Q attaching the feed motor
(L).
Clutch assembly
Removing the feed motor (R) (See Fig.15)
Prior to performing the following procedure, remove
the lifter unit.
1. Remove the washer attaching the clutch assembly Feed motor (L) assembly
and detach the clutch assembly from the shaft of the
Washer
lifter unit. Q
2. Remove the two screws R attaching the feed motor Fig.14
(R).
Lifter unit assembly
Clutch assembly
Feed motor (R) assembly
R
Washer
Fig.15
1-6
KS-LX200R
Removing the operation assembly
(See Fig.16 to 19)
Prior to performing the following procedure, remove
the top chassis assembly, the front panel assembly
and the lifer unit. Bracket (R)
Bracket (L)
1. Remove the three screws S attaching the right and
left brackets which fix gears on both sides of the
operation assembly. S
S
2. Remove the springs 5 and 6 from the operation
assembly.
3. Disconnect the card wire from connector CN702 on
the main board and remove the operation assembly. Spring 5 CN702 Spring 6
Operation assembly
ATTENTION: When reassembling, correctly engage the
switch S561 and S562 on the main board Fig.16
and the right gear with the part c of the
operation assembly.
S652
S651
Operation assembly c
Fig.17
Bracket (R)
Operation assembly
Operation assembly c
c
S652 S651
Fig.19 Fig.18
1-7
KS-LX200R
Removing the operation switch board
(See Fig.20 and 21)
Prior to performing the following procedure, remove
the operation assembly.
TT
1. Remove the six screws T attaching the button panel
on the operation assembly.
2. Pull out the operation switch board from inside of the
button panel. Button panel
Fig.20
Operation switch board
Button panel
Fig.21
Removing the cassette mechanism U U
assembly (See Fig.22)
Prior to performing the following procedure, remove
the top chassis.
1. Remove the four screws U and the cassette
mechanism assembly from the top chassis.
U U
CD mechanism assembly
Fig.22
1-8
KS-LX200R
Head amplifier board
Disassembly method Connector board
Removing the head amplifier board
(See Fig.1)
1. Disconnect the wire from connector CP401 on the
head amplifier board.
2. Remove the screw A. A
Joints a
3. Remove the head amplifier board in the direction of Fig.1
the arrow to unhook two joints a.
4. Disconnect connector CP402 on the head amplifier B
board from the connector board.
Removing the mechanism bracket
(See Fig.2) B
Prior to performing the following procedure, remove
the head amplifier board.
1. Remove the four screws B on the underside of the
cassette mechanism assembly.
B Mechanism bracket
Fig.2
Prior to performing the following procedure, remove
the head amplifier board and the mechanism Soldering b
bracket. C Joint d
C
Removing the connector board
(See Fig.3)
1. Unsolder soldering b and c on the connector board.
2. Remove the three screws C.
3. Remove the connector board in the direction of the Connector board
arrow to unhook joint d. C
Soldering c
Fig.3
1-9
KS-LX200R
Removing the load arm assembly
(See Fig.4)
Prior to performing the following procedure, remove
the connector board.
1. Remove the slit washer e retaining the load arm
assembly.
2. Remove the spring g in the load arm assembly
marked joint f.
Load arm assembly
D
3. Draw out the load arm assembly from the shaft and Load arm assembly
rotate in the direction of the arrow to remove it from Holder arm Joint h
the cach. Slit washer e
ATTENTION: The spring g comes off as the load Joint f
arm assembly is drawn out from the Load arm
shaft. assembly
Cach
Spring g
Worm gear
Removing the sub chassis (See Fig.4) Cassette holder
Main chassis D Sub chassis
Prior to performing the following procedure, remove
the connector board and the load arm assembly. Fig.4
1. Remove the two screws D attaching the sub
chassis.
2. Draw out the sub chassis from the holder arm shaft
in the direction of the arrow (marked joint h).
Remove the sub chassis from the main chassis
upwards.
Holder arm E Joint h
Removing the cassette holder / holder
arm (See Fig.5)
Prior to performing the following procedure, remove
the connector board and the load arm assembly.
1. Remove the screw E attaching the cassette holder /
holder arm.
Joints i
2. Draw out the holder arm shaft from the sub chassis
in the direction of the arrow (marked joint h).
3. Disengage two joints i and remove the cassette Main chassis Cassette holder Sub chassis
holder / holder arm.
Fig.5
1-10
KS-LX200R
Removing the sub motor
(See Fig.4 and 6) Slit washer j
Prior to performing the following procedure, remove
the connector board and the load arm assembly.
1. Remove the slit washer j and the worm gear.
2. Remove the two screws F. Worm gear
Sub motor
F
Fig.6
Removing the play head / pinch roller Pinch roller assembly Pinch roller assembly
assembly (twin set) (See Fig.7) Slit washer l Play head Slit washer l
Prior to performing the following procedure, remove
the connector board, the load arm assembly and the
sub chassis.
1. Remove the spring K retaining the play head
assembly and pull out the play head assembly.
2. Remove the two screws G. G
Spring k
3. Remove the two slit washers l attaching the pinch
roller assembly (twin set). Pull out each pinch roller
assembly.
Spring k
Fig.7
1-11
KS-LX200R
Reel disc assembly
Removing the reel disc assembly (twin Motor
Reel driver
set) (See Fig.8 to 10)
Prior to performing the following procedure, remove
the connector board, the load arm assembly, the sub
chassis and the cassette holder / holder arm.
1. Remove the two slit washers m while pushing down
the reel driver on the two reel disc assemblies. Slit
washers n
Soldering q
2. Pull out the two screws I from the shaft with the reel
Slit
driver and the spring respectively. washers m
Removing the flywheel assembly (F) and Reel driver
Reel disc assembly
(R) (See Fig.8 and 11) Fig.8
Prior to performing the following procedure, remove
the connector board, the load arm assembly, the sub Reel driver Slit washer m
chassis and the cassette holder / holder arm.
1. Remove the belt from the underside of the
mechanism assembly.
2. Remove the two slit washers on the upper side of the
Fig.9
mechanism assembly.
3. Pull out the flywheel assembly (F) and (R) from Reel driver
underside of the mechanism assembly.
Spring
Removing the reel disc board Reel disc
(See Fig.11)
1. From the underside of the mechanism assembly,
unsolder soldering o on the reel disc board.
2. Unbend the joint hook p retaining the reel disc board.
Fig.10
3. Remove the screw H.
Flywheel (F) H I Motor
Belt
Removing the motor (See Fig.8and 11)
I
1. Unsolder soldering q on the motor. Soldering o
Reel disc board
2. Remove the belt from the underside of the
mechanism assembly. Joint hook p
3. Remove the two screws I from the underside of the
mechanism assembly.
Flywheel (R) Tab
Fig.11 Reel disc board
1-12
KS-LX200R
Adjustment method
Test Instruments reqired for adjustment Tuner section
1.Digital osclloscope(100MHz) BAND STEP
2.Frequency Counter meter FM : 100kHz (Seek), 50kHz (Manual)
3.Electric voltmeter AM : 9kHz step
4.Wow & flutter meter
5.Test Tapes
Preset Memory Initialization
VT724 for DOLBY level measurement
Preset Memory
VT739 For playback frequency measurement Band
M1 M2 M3 M4 M5 M6
VT712 For wow flutter & tape speed measurement
FM(MHz) 87.5 89.9 97.9 105.9 108.0 87.5
VT703 For head azimuth measurement
AM(kHz) 153 216 603 999 1404 1620
6.Torque gauge Cassette type for CTG-N
(mechanism adjustment)
DUMMY LOAD
Measuring conditions(Amplifier section) Exclusive dummy load should be used for AM
Power supply voltage DC14.4V(10.5~16V) and FM dummy load,there is a loss of 6dB
Load impedance 4 (2Speakers connection) between SSG output and antenna input. The
Line out 20k loss of 6dB need not be considered since
direct reading of figures are applied in this
Standard volume position working standard.
Balance and Bass,Treble volume .Fader
:Center(Indication"0") Arrangement of Adjusting
Loudness,Dolby NR,Sound,Cruise:Off Cassette Mechanism Section
Volume position is about 2V at speaker output with Tape speed adjust
Capstan motor
following conditions.Playback the test tape VT721.
Cassette mechanism
(Surface)
AM mode 999kHz/62dB,INT/400Hz,30%
modulation signal on receiving.
FM mono mode 97.9MHz/66dB,INT/400Hz,22.5kHz
deviation pilot off mono.
FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev.
Output level 0dB(1 V,50 /open terminal).
Azimuth screw Playback head
(Forward side)
Azimuth screw
(Reverse side)
1-13
KS-LX200R
Arrangment of adjusting
Head amplifier board section (Reverse side)
VR402:Rch VR401:Rch
(Dolby NR level adj) (Dolby NR Frequency response adj)
B402 C409
B415
R411 VR401
VR402 C412 C411 C410
C417
R412
R423
B416
D403
R413
R410
E C404 TPP
C418 C413
Q401 1
D401
R424
R402
C401
C405 CP402
R421 1
R422 R408 2
R404
R405
B406
31
C403
IC402 1
Q402
11
B409 R425
B401 C419 C414
B414
C407
Q403
B411
R401
21
CP401
C415
R409
IC401
C408
C406
R417
B412
R420
D402
B403
1 R414
R416
B410
R407
B404
R415
C416
R418
R406
R419
B408
R403
CP403 C402
1 FSMW1101A
B407
17 1 B405
B413
Information for using a Car Stereo service jig (for adjustment and checking)
We are advancing efforts to make our extension cords comman for all Car Stereo products.
Please use this type of extension cord as follows.
As a U -shape type top cover is employed,this type of extension cord needed to check operation of
the mechanism assembly after disassembly.
Extension cords
EXT-KSRT002-18P(18 pin extension cord)
For connection between mechanism assembly
and main board assembly.
Check for mechanism-driving section such as moter ,etc.
Disassembly method. (Refer to mthod to remove main parts)
1.Remove the bottom cover.
2.Remove the front panel assembly.
3.Remove the top cover. (Remove the screws at each side of heat sink and rear panel)
4.Install the front panel (whose assembly was removed in step 2) to the main unit.
5.Confirm that current is being is carried by connecting an extension cord jig.
Connection diagram
EXTLX002-SWPWB
EXTLX001-16PF
EXTLX002-4P
EXTLX002-16PC
EXTLX001-2P
EXT-KSRT002-18P
EXTLX001-6PC
EXTLX001-2P
EXTLX001-6PF
1-14
KS-LX200R
Extension cord list
EXTLX002-JIG : Kit including the following 8 extension parts.
No. Parts number Quantity Description
1 EXTLX001-2P 2 2Pin, 30cm extension cord
2 EXTLX001-6PF 1 6Pin, 30cm flat wire
3 EXTLX001-6PC 1 6Pin x 2, interlocking connector
4 EXTLX002-16PF 1 16Pin flat wire
5 EXTLX002-16PC 1 16Pin, interlocking connector
6 EXTLX002-SWPWB 1 3 switch PWB
7 EXTLX002-4P 1 4Pin, 30cm extension cord
Besides the above kit, we offer the conventional extension cord for CASSETTE
mechanism which are not essential to operation check or service.
The mechanism should be directly connected to the board using the extension wire.
EXT-KSRT002-18P
EXTLX002-SWPWB
EXTGS004-26P EXTLX002-4P
EXTLX002-16PC
EXTLX001-2P
EXTLX001-16PF
EXTLX001-6PC
EXTLX001-2P
EXTLX001-6PF
1-15
KS-LX200R
Item Conditions Adjustment and Confirmation methods S.Values Adjust
1. Head Test tape: Head height adjustment
azimuth SCC-1659 Adjust the azimuth directly. When you
adjustment VT703(10kHz) adjust the height using a mirror tape,
remove the cassette housing from the
mechanism chassis. After installing the
cassette housing, perform the azimuth
adjustment. A line
1. Load the SCC-1659 mirror tape. Adjust with
height adjustment screw A and azimuth Head shield
adjustment screw B so that line A of the
mirror tape runs in the center between Lch The head is at low position
and Rch in the reverse play mode. during.
2. After switching from REV to FWD then to
REV, check that the head position set in B line
procedure 1 is not changed. (If the position
has shifted, adjust again and check.)
Head shield
3. Adjust with azimuth adjustment screw B so The head is at High position
that line B of the mirror tape runs in the during REV.
center between Lch and Rch in the forward
play mode.
Output
Head azimuth adjustment level:
Maximum
1. Load VTT724 (VT724) (1kHz) and play it
back in the reverse play mode. Set the Rch PBHead
output level to max.
FWD Adj B
2. Load VTT703 (VT703) (10kHz) and play it
back in the forward play mode. Adjust the
Rch and Lch output levels to max, with
azimuth adjustment screw B. In this case,
the phase difference should be within 45 .
REV Adj C HEIGHT Adj A
3. Engage the reverse mode and adjust the
output level to max, with azimuth
adjustment screw C.
(The phase difference should be 45 or
more.) phase
(0 ) (45 )
4. When switching between forward and
reverse modes, the difference between
channels should be within 3dB. (Between
FWD L and R, REV L and R.)
5. When VTT721 (VT721) (315Hz) is played
back, the level difference between channels
should be within 1.5dB.
2. Tape speed Test tape: VTT712 1. Check to see if the reading of the F, counter / Tape speed: Built-in volume
and wow (3kHz) wow flutter meter is within 3015 3045(FWD 3015 resistor
flutter / REV), and less than 0.35% (JIS RMS). 3045Hz
confirmation Wow
2. In case of out of specification, adjust the flutter: less
motor with a built-in volume resistor. than 0.35%
3. Play back Test tape: VTT724 1. Play test tape VTT724, and set the volume Speaker out
frequency (1kHz) position at 2V. 1kHz / 63Hz
response VTT739 :0 3db
confiramation (63Hz / 1kHz / 10kHz) 2. Play test tape VTT739 and confirm. 1kHz / 10kHz
1kHz / 10kHz: -1 3dB, : -1 3db
1kHz / 63Hz: 0 3dB,
3. When 10kHz is out of specification, it will be
necessary to read adjust the azimuth.
The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack.
1-16
KS-LX200R
Description of major ICs
BA4905-V3 (IC961) : Regulator
1.Pin layout
1 2 3 4 5 6 7 8 9 10 11 12
2.Block diagram
REGULATOR
EXT
protection circuit
37K
Overvoltage 5K
RESET
1 2 3 4 5 6 7 8 9 10 11 12
RESET COMP VDD 5.7V CD 8V VCC AJ
EXT ACC AUDIO 9V CTRL ILM 10V GND
3.Pin function
Pin no. Symbol Function
1 RESET If VDD voltage becomes 4V or less.RESET output becomes low level.
2 EXT output This output voltage is approximately 0.5V lower than VCC. and max
output current is 300mA.
3 COMP output A voltage supply for ACC block. This output voltage is approximately
0.7V lower than VDD'S. The max output current is 100mA.
4 ACC Control of the COMP output by inputting voltage.
5 VDD output This output voltage is 5.7V, and max output current is 100mA.
This voltage supply is for microcomputer. Whenever back up voltage
supply is connected, the output keeps on running.
6 AUDIO output This output voltage is 9.0v, and max output current is 500mA.
This voltage supply for AUDIO.
7 CD output This output voltage is 8.0V, and max output current is 1A.
This voltage supply for CD.
8 CTRL Output selector of CD. AUDIO, ILM and EXT.
9 VCC To be connected with the BACK UP of car.
10 ILM output This output voltage is 10V, and max output current is 500mA.
Output voltage is adjustable.
11 AJ Putting a resistance between ILM and AJ or between AJ and GND
makes ILM output voltage adjustable.
12 GND Ground.
1-17
KS-LX200R
CXA2510AQ (IC401) : Head AMP / Dolby
1. Pin layout & Block diagram
24 LINEOUT2
29 PBOUT2
27 TAPEIN2
26 AUXIN2
30 PBEQ2
21 MSSW
25 DIREF
23 TCH2
22 TCL2
28 GND
NR
PBFB2 31 120 /70 20 MSMODE
OFF/
+
B/C
-
PBRIN 32 19 DRSW
-
+
T2
MS MODE
X1 NR BIAS
PBREF2 33 18 TAPESW
F2
TAPE / AUX
PBFIN2 34 17 INSW
TAPE EQ
VCT 35 NR MODE 16 NRSW
VCT FWD / RVS
PBGND 36 15 MRMODE
Vcc MS ON/
OFF
LPF + DET 14 MSOUT
PBFIN1 37
-
F1
PBREF1 38 F3 13 DGND
X1
T1
-
+
PBRIN1 39 12 MSTC
+
-
PBFB1 40 120 /70 NR 11 G1FB
PBEQ1 1
PBOUT1 2
Vcc 3
TAPEIN1 4
AUXIN 5
MSLPF 6
LINEOUT1 7
TCH1 8
TCL1 9
G2FB 10
2. Pin functions
Pin No. Symbol I/O Functions
1 PBEQ1 O Resistance for selecting the equalizer amplifier time constant.
2 PBOUT1 O Playback equalizer amplifier out put.
3 Vcc - Power supply
4 TAPEIN1 I TAPE input.
5 AUXIN1 I External input.
6 MSLPF - Cut-off frequency adjustment of the music sensor LPF.
7 LINEOUT1 O Line out.
8 TCH1 - Time constant for the HLS.
9 NC - Non connection.
10 G2FB - Music signal interval detection level setting.
11 G1FB
12 MSTC Time constant for detecting the music signal interval.
13 DGND - Logic ground (Connect to GND)
14 MSUOT O Music sensor output.
15 NC I Non connection.
1-18
KS-LX200R
Pin Symbol I/O Functions
16 NRSW I Dolby NR control L:NR OFF H:NR ON
17 INSW I Line amplifier input select control L:TAPE IN H:AUX IN
18 METAL I Playback equalizer amplifier control L:120us H:70us
19 DRSW I Head select control L:FORWARD H:REVERSE
20 FF/REW I Music sensor mode control Low(open):G1 High:G2
21 MSSW I Music sensor control Low(open):MS on High:MS OFF
22 NC - Non connection
23 TCH2 - Time constant for the HLS
24 LINEOUT2 O Line output
25 DIREF - Resistance for setting the reference current (Connects 20(18)K
between DIREF pin and GND for the standard setting.)
26 NC - Non connection.
27 TAPEIN2 I TAPE input.
28 GND - To ground.
29 PBOUT2 O Playback equalizer amplifier output.
30 PBEQ2 O Resistance for