JVC KS-FX725R User Manual 2
SERVICE MANUAL
TP
RDS
PTY
DISP
CASSETTE RECEIVER
KS-FX725R
KS-FX725R
Contents
DISP
TP
RDS
PTY
8 9 10 11 127
Safety precaution
Disassembly method
Adjustment method
Description of major ICs
DAB
MO
Area Suffix
EE ---- Russian Federation
1-2
1-3
1-18
1-22
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
No.49721
Mar. 2002
KS-FX725R
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
Disassembly method
<Main body>
Removing the front panel assembly
(See Fig.1)
1.
Press the eject button in the lower right part of the
front panel. Remove the front panel assembly from
the body.
Removing the front chassis assembly
(See Fig.2 , 3)
Front panel assembly
Joint
KS-FX725R
Eject button
Fig.1
a
Prior to performing the following procedure, remove
the front panel assembly.
1.
Release the four joints a on both sides of the front
chassis assembly and remove the front chassis
assembly toward the front.
Joint
Front chassis assembly
Heat sink
a
Fig.2
Joint
Joint
a
a
Front chassis
assembly
Fig.3
1-3
KS-FX725R
Removing the heat sink (See Fig.4)
1.
Remove the three screws A on the left side of the
body.
Removing the bottom cover
(See Fig.5 , 6)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly
and the heat sink.
1.
Turn over the body and unjoint the five joints b with
the bottom cover and the body using a screwdriver.
CAUTION:
When disengaging the joint c using a
screwdriver, do not damage or break the
board.
AA
Heat sink
Fig.4
Joint b
Bottom cover
Joint c
Joint b
Rear panel
Fig.5
Joint b
Bottom cover
Joint b
Joint c
Rear panel
Fig.6
1-4
KS-FX725R
Removing the main board
(See Fig.7 , 8)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink and the bottom cover.
1.
Remove the screw B, the three screws C and the
two screws D attaching the rear bracket on the back
of the body. Remove the rear panel.
2.
Remove the two screws E attaching the main board
on the bottom of the body. Disconnect connector
CP401 on the main board in the direction of the
arrow.
D
E
Rear panel
Fig.7
Main board
C
B
C
D
E
Removing the cassette mechanism section
(See Fig.9)
Prior to performing the following procedure, remove
the front panel assembly, the front chassis assembly,
the heat sink, the bottom cover and the main board.
1.
Remove the four screws F attaching the cassette
mechanism section on the back of the top chassis.
Fig.8
CP401
Cassette mechanism section
FF
FF
Fig.9
Top chassis
1-5
KS-FX725R
Removing the control switch board
(See Fig.10 ~ 12)
Prior to performing the following procedure, remove
the front panel assembly.
1.
Remove the four screws G attaching the rear cover
on the back of the front panel assembly.
2.
Unjoint the ten joints d with the front panel and the
rear cover.
3.
Remove the control switch board on the back of the
front panel.
G G
G
Rear cover
Fig.10
G
Front panel
Joint d
Rear cover
Front panel
Joint d
Joint d
Joint d
Fig.11
1-6
Control switch board
Fig.12
KS-FX725R
REFERENCE:
Prior to performing the following
procedures, turn the mode gear on the
bottom of the body until the respective part
comes to the EJECT position (Refer to
Fig.1).
Removing the reinforce bracket
(See Fig.1 and 2)
1.
Remove the screw A attaching the reinforce bracket
on the bottom of the body.
2.
To release joint a, turn and detach the reinforce
bracket from the side bracket assembly as shown in
Fig.2
Removing the cassette guide (See Fig.3)
1.
Turn the mode gear to set to RVS play or
subsequent mode.
2.
Remove the cassette guide from the main chassis
while releasing each two joint tabs b in the direction
of the arrow.
Mode gear
Reinforce bracket
A
Fig.1
Joint a
Reinforce bracket
Removing the head board (See Fig.4)
1.
Remove the screw B on the upper side. Unsolder
the wires on the under side of the head board, if
necessary.
REFERENCE:
Cassette guide
When reassembling, twist the wires by
turning the head board twice remarked c
and pass through the notch d as shown
in Fig.4.
Head board
B
Fig.2
Head board
Soldering
notch d
Tab b
Tab b
c
Fig.4Fig.3
1-7
KS-FX725R
Removing the load arm (See Fig.5)
1.
Remove the E-washer attaching the load arm.
2.
Move the load arm in the direction of the arrow and
release the joint e on the cassette catch.
Removing the cassette hanger assembly /
cassette holder (See Fig.6 to 9)
1.
Check the mode is set to EJECT. Push down the
front part of the cassette holder and move in the
direction of the arrow to release the joint f.
2.
Move the rear part of the cassette hanger assembly
in the direction of the arrow to release it from the two
joint bosses g.
Load arm
E-washer
Cassette holder assembly
Side bracket
Joints f
Joint e
Fig.5
Boss g
Cassette hanger
assembly
Boss g
3.
Release the holder stabilizer spring from the hooks h
and i, then pull out from the cassette hanger
assembly.
4.
Bring up the rear side of the cassette hanger
assembly to release the joint j and k.
5.
Pull out the cassette catch from the cassette hanger
assembly.
Cassette holder
assembly
Cassette holder assembly
Fig.6
Cassette hanger assembly
Cassette stabilizer spring
Hook i
Hook h
Fig.7
Cassette hanger assembly
Cassette catch
Cassette holder assembly
1-8
Hook j
Fig.8
Cassette hanger assembly
Hook k
Fig.9
KS-FX725R
Removing the side bracket assembly
(See Fig.10 to 12)
1.
Remove the screw C attaching the side bracket
assembly.
2.
Detach the front side of the side bracket assembly
upward and pull out forward to release the joint l and
m in the rear.
CAUTION:
CAUTION:
When reassembling, make sure that the
boss n of the main chassis is set in the
notch of the load rack under the side
bracket assembly. Do not reattach the
load rack on the boss n.
After reattaching the side bracket
assembly, confirm operation.
Side bracket assembly
Joint l
Joint m
C
Side bracket assembly
Fig.10
Side bracket assembly
Joint l
Joint m
Load rack
Load rack
Boss n
Boss n
Fig.11
Fig.12
1-9
KS-FX725R
Removing the pinch arm (F) assembly
(See Fig.13 and 14)
1.
Remove the polywasher and pull out the pinch arm
(F) assembly.
2.
Remove the compulsion spring.
Removing the pinch arm (R) assembly
(See Fig.13 and 15)
1.
Remove the polywasher and pull out the pinch arm
(R) assembly.
Removing the slide chassis assembly
(See Fig.16 and 17)
Polywasher
Pinch arm
(R) assembly
Polywasher
Compulsion spring
Fig.13
Pinch arm
(F) assembly
Pinch arm (F) assembly
Polywasher
REFERENCE:
It is not necessary to remove the head
and the tape guide.
1.
Move the slide chassis assembly in the direction of
the arrow to release the two joints o and remove
from the main chassis.
2.
Remove the rack link.
CAUTION:
When reassembling, first reattach the rack
link, and next fit the boss p and hook q of
the slide chassis assembly to the hole of the
main chassis, and engage the two joints o.
Rack link
Fig.14
Boss p
Pinch arm
(R) assembly
Fig.15
Head
Hook q
Polywasher
Tape guide
Joint o
Slide chassis assembly
1-10
Fig.16
Joint o
Fig.17
KS-FX725R
Removing the head / tape guide
(See Fig.18 and 19)
REFERENCE:
1.
Remove the band attaching the wire to the head.
2.
Remove the two screws D, the head and the head
support spring.
3.
Remove the pinch arm spring from the tape guide.
4.
Remove the tape guide and the pinch spring arm.
CAUTION:
CAUTION:
It is not necessary to remove the slide
chassis assembly.
When reattaching the pinch arm spring, set
both end of it to the pinch spring arm (
remarked r).
When reattaching the head, set the wires
into the groove of the tape guide (Fig.18).
D
Slide chassis assembly
Head
Tape guide
Fig.18
D
Pinch arm spring
Head
Head support spring
Tape guide
Removing the flywheel assembly (F) & (R)
(See Fig.20 and 21)
REFERENCE:
1.
Remove the belt at the bottom.
2.
Remove the two polywashers on the upper side.
3.
Pull out each flywheel assembly downward.
Flywheel assembly (F)
It is not necessary to remove the slide
chassis assembly.
Belt
r
Pinch spring arm
r
Slid chassis assembly
Fig.19
Polywasher
Polywasher
Flywheel assembly (R)
Fig.20
Flywheel assembly (F)
Fig.21
Flywheel assembly (R)
1-11
KS-FX725R
Disassembling the flywheel assembly (F)
(See Fig.22 and 23)
1.
Push and turn counterclockwise the spring holder (F)
to release the three joints s on the bottom of the
flywheel.
2.
The spring holder (F), the TU spring and the friction
gear play come off.
3.
Remove the polywasher and felt.
Flywheel assembly (F)
Joints s
Flywheel assembly (R)
Joints t
Disassembling the flywheel assembly (R)
(See Fig.22 and 24)
1.
Push and turn clockwise the spring holder (R) to
release the three joints t on the bottom of the
flywheel.
2.
The spring holder (R), the FF spring and the friction
gear FF come off.
3.
Remove the polywasher and the felt.
Removing the reel board
(See Fig.25 and 26)
1.
Remove the two screws E attaching the reel board.
2.
Move the reel board in the direction of the arrow to
release the joint u.
3.
Unsolder the wires if necessary.
CAUTION:
When reattaching, confirm operation of
the MODE switch and the ST-BY switch.
The mode position between EJECT and
ST-BY is optimum for reattaching.
Joint s
Fig.22
Polywasher
Polywasher
Spring holder (R)
Spring holder (F)
TU spring
Friction gear FF
Friction gear play
Felt
Flywheel assembly (F)
FF spring
Felt
Flywheel assembly (R)
Fig.23 Fig.24
Joint t
1-12
Connect the card wire extending from
the reel board to the FFC pad before
reattaching the reel board.
FFC pad
E
Reel board
E
Fig.25
Joint u
FFC pad
CT-1 switch
MODE switch
Soldering
ST-BY switch
Fig.26
KS-FX725R
Removing the gear base arm / gear base
link assembly (See Fig.27 to 29)
1.
Move the gear base arm in the direction of the arrow.
2.
Insert a slotted screwdriver to the gear base spring
under the gear base arm, and release the gear base
arm upward from the boss on the gear base
assembly.
3.
Remove the gear base arm from the main chassis
while releasing the two joints v.
4.
Move the gear base link assemby in the direction of
the arrow to release the two joints w.
REFERENCE:
When reattaching the gear base arm,
make sure that the boss on the gear
base assembly is inside the gear base
spring.
Removing the FFC pad
(See Fig.27 and 29)
Gear base
link assembly
Gear base spring
Joint w
Gear base arm
Joints v
Hook x
FFC pad
Hook x
Joint w
Fig.27
Gear base arm
Screwdriver
1.
Push each joint hook x of the FFC pad and remove
toward the bottom.
Gear base link assembly
Fig.28
Gear base arm
Fig.29
FFC pad
1-13
KS-FX725R
Removing the mode gear
(See Fig.30 and 33)
1.
Remove the polywasher on the bottom and pull out
the mode gear.
Removing the mode switch actuator
(See Fig.30, 31 and 33)
1.
Pull out the mode switch actuator at the bottom.
REFERENCE:
When reattaching the mode switch
actuator to the main chassis, make sure to
set on the shaft and insert y into the slot z.
Removing the direction link / direction
plate (See Fig.31 to 33)
1.
Remove the polywasher attaching the direction link.
2.
Bring up the direction link to release the three joints
a’, b’ and c’ at a time.
3.
Move the direction plate in the direction of the arrow
to release the two joints d’.
REFERENCE:
When reattaching the direction plate,
engage the two joints d’ and move in the
direction of the arrow (See Fig.32).
Mode switch actuator
Direction plate
Direction link
Fig.30
Direction plate
Joints d'
Joint c'
Direction link
Slot z
Joint b'
Polywasher
Fig.31
Direction plate Mode rack assembly
Joint k'
Mode gear
Polywasher
Mode rack assembly
Joint a'
Joint k'
Joint l'
REFERENCE:
When reattaching the direction link,
move the direction plate in the direction
of the arrow and engage the three joint
a’, b’ and c’ at a time (See Fig.33).
Removing the mode rack assembly
(See Fig.31 and 32)
1.
Move the mode rack assembly in the direction of the
arrow to release the two joints k’ and the joint l’.
REFERENCE:
When reattaching, set the two k’ on the
bottom of the mode rack assembly into the
slots of the main chassis and move in the
direction of the arrow (See Fig.32).
Joints d'
Fig.32
Direction link
Mode switch actuator
Polywasher
y
Mode gear
Direction plate
Mode rack assembly
Fig.33
1-14
KS-FX725R
Removing the gear base assembly / take
up gear / reflector gear (See Fig.34 to 36)
1.
Push in the pin e’ of the gear base assembly on the
upper side of the body and move the reflector gear
toward the bottom, then pull out.
2.
Remove the polywasher on the bottom and pull out
the take up gear.
3.
Move the gear base assembly in the direction of the
arrow to release it from the two slots f’ of the main
chassis.
REFERENCE:
The parts are damaged when removed.
Please replace with new ones.
Gear base assembly
Pin e'
Polywasher
Slot f'
Slot f'
Fig.34
Take up gear
Removing the reel driver / reel spindle
(See Fig.36)
1.
Draw out the reel driver from the shaft on the main
chassis and remove the reel driver spring and the
reel spindle respectively.
CAUTION:
The reel driver is damaged when
removed. Please replace with a new
one.
Reflector gear
Reel driver
Reel driver spring
Reel spindle
Main chassis
Fig.35
Reel driver
Reel driver spring
Reel spindle
Gear base assembly
Slots f’
Take up gear
Reflector gear
Polywasher
Fig.36
1-15
KS-FX725R
Removing the side bracket assembly
(See Fig.37 to 41)
1.
Remove the eject cam plate spring.
2.
Push the joint g‘ through the slot to remove the load
rack downward.
3.
Move the eject cam limiter in the direction of the
arrow to release it from the boss h’ of the side
bracket assembly and from the two joints i’.
4.
Move the eject cam plate in the direction of the arrow
to release the joint j’.
Joint g'
CAUTION:
Joint i'
When reassembling, confirm operation of
each part before reattaching the eject cam
plate spring.
Side bracket assembly
Boss h'
Eject cam limiter
Side bracket assembly
Joint i'
Joint g'
Eject cam plate spring
Joint i'
Load rack
Fig.37
Boss h'
Eject cam limiter
Eject cam plate
Fig.39
Joint i'
1-16
Fig.38
Side bracket assembly
Boss h'
Eject cam plate
Fig.40
Load rack
Joint j'
Side bracket assembly
Eject cam plate
Joint j'
Fig.41
KS-FX725R
Removing the main motor assembly /
sub motor assembly (See Fig.42 to 44)
1.
Remove the belt at the bottom.
2.
Remove the polywasher and pull out the mode gear.
3.
Pull out the reduction gear (B).
4.
Remove the polywasher and pull out the reduction
gear (A).
5.
Remove the two screws F attaching the main motor
assembly.
6.
Remove the two screws G attaching the sub motor
assembly.
7.
Unsolder the wires on the reel board if necessary.
CAUTION:
When reassembling, adjust the length of the
wires extending from the sub motor
asswmbly by attaching them to the side of
the sub motor assembly with the wires
extending from the main motor assembly
using a spacer.
Belt
Reduction gear (B)
Reduction gear (B)
G
Polywasher
Fig.42
F
G
Mode gear
Polywasher
Reduction gear (A)
F
Main motor
assembly
Reduction
gear (A)
Polywasher
Sub motor
assembly
Spacer
Main motor assembly
Sub motor assembly
Main motor assembly
Sub motor assembly
Fig.43
Spacer
Fig.44
1-17
KS-FX725R
Adjustment method
Test instruments reqired for adjustment
1. Digital osclloscope(100MHz)
2. Frequency Counter meter
3. Electric voltmeter
4. Wow & flutter meter
5. Test tapes
MC-109C
VT724.......................
VT739............For playback frequency measurement
VT712....For wow flutter & tape speed measurement
VT703..................... For head azimuth measurement
6. T orque gauge ....................Cassette type for CTG-N
...................
for TAPA CURL confirmation
(without Padd type)
for DOLBY level measurement
(mechanism adjustment)
Standard volume position
Balance and Bass,Trable volume, Fader
:Center(Indication"0")
Loudness,Dolby NR,Sound,Cruise:Off
Volume position is about 2V at speaker output with
following conditions.Playback the test tape VT721.
FM1/FM2: 87.5MHz to 108.0MHz
FM3 : 65MHz to 74 MHz
AM : (MW)522kHz to1620kHz
(LW) 144kHz to 279kHz
Measuring conditions(Amplifier section)
Power supply voltage.............. DC14.4V (11V to 16V allowance)
Line-Out Level/Impedance....... 2.0V/20k load(250 nWb/m) ...........
1-18
Arrangement of adjusting & test points
Cassette mechanism
(Surface)
Motor assembly
KS-FX725R
Tape speed adjust
Head section view
Azimuth screw A
(Forward)
Playback head
Azimuth screw B
(Reverse)
Azimuth screw B
(Reverse)
Azimuth screw A
(Forward)
Playback Head
1-19
KS-FX725R
Arrangment of adjusting
Head amplifier board section (Reverse side)
R411
VR402
FSMW1093A
B409
R426
C423
R425
D401
1
T11
R424
IC402
VR402:Rch
(Dolby NR level
B407
C425
C424
Q401
R410
B406
D402
R401
R416
C419
C422
C413
C414
B408
C421
adj)
C418
R420
Q403
R412
11
R414
R415
R418
B411
B410
21
R413
R417
C417
B404
CJ403
2
C415
1
B413
C416
B403
(Dolby NR F
C412
1
IC401
31
C411
B405
B412
VR401
B402
R423
requency response adj)
B401
R408
C410
C409
R405
R406
C405
C406
R407
C407
C403
C408
R403
R402
C402
2
CJ401
1
C404
R404
C401
1
R422
Q402
VR401:Rch
Information for using a car audio service jig
1. We're advancing efforts to make our extension cords common for all car audio products.
Please use this type of extension cord as follows.
2. As a U-shape type top cover is employed, this type of extension cord is needed to check operation of the
mechanism assembly after disassembly.
3. Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assembly
and main board assembly .
Check for mechanism driving section such as motor ,etc..
Cassette mechanism
Disassembly method
1. Remove the bottom cover.
2. Remove the front panel assembly.
3. Remove the top cover .
4. Install the front panel.
5. Confirm that current is being carried by connecting
an extension cord jig.
Note
Available to connect to the CP701 connector when installing the front panel.
Extension cord
EXTKSRT002-18P
to Cassette mechanism
1-20
EXTKSRT002-18P
Main board
to Main board
Front panel assembly
KS-FX725R
Item
Head
1.
azimuth
adjustment
Conditions
Test tape:
SCC-1659
VT703(10kHz)
Adjustment and Confirmation methods
Head height adjustment
Adjust the azimuth directly. When you
adjust the height using a mirror tape,
remove the cassette housing from the
mechanism chassis. After installing the
cassette housing, perform the azimuth
adjustment.
Load the SCC-1659 mirror tape. Adjust with
1.
height adjustment screw A and azimuth
adjustment screw B so that line A of the
mirror tape runs in the center between Lch
and Rch in the reverse play mode.
After switching from REV to FWD then to
2.
REV, check that the head position set in
procedure 1 is not changed. (If the position
has shifted, adjust again and check.)
Adjust with azimuth adjustment screw B so
3.
that line B of the mirror tape runs in the
center between Lch and Rch in the forward
play mode.
Head azimuth adjustment
Load VT724 (1kHz) and play it back in
1.
the reverse play mode.
Set the Rch output level to max.
Load VT703 (10kHz) and play it back in
2.
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 .
Engage the reverse mode and adjust the
3.
output level to max, with azimuth
adjustment screw C.
(The phase difference should be 45 or
more.)
When switching between forward and
4.
reverse modes, the difference between
channels should be within 3dB. (Between
FWD L and R, REV L and R.)
S.Values Adjust
A line
Head shield
The head is at low position
during.
B line
Head shield
The head is at High position
during REV.
Output
level:
Maximum
PBHead
FWD Adj B
REV Adj C
(0 ) (45 )
HEIGHT Adj A
phase
Tape speed
2.
and wow
flutter
confirmation
Play back
3.
frequency
response
confiramation
When VT721 (315Hz) is played back,
5.
the level difference between channels
should be within 1.5dB.
Test tape: VT712
(3kHz)
Test tape: VT724
(1kHz)
VT739
(63Hz / 1kHz / 10kHz)
The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack.
Check to see if the reading of the F, counter /
1.
wow flutter meter is within 3015 3045(FWD
/ REV), and less than 0.35% (JIS RMS).
In case of out of specification, adjust the
2.
motor with a built-in volume resistor.
Play test tape VT724, and set the volume
1.
position at 2V.
Play test tape VT739 and confirm.
2.
1kHz / 10kHz: -1 3dB,
1kHz / 63Hz: 0 3dB,
When 10kHz is out of specification, it will be
3.
necessary to read adjust the azimuth.
Tape speed:
3015
3045Hz
Wow
flutter: less
than 0.35%
Speaker out
1kHz / 63Hz
: 0 3db
1kHz / 10kHz
: -1 3db
Built-in volume
resistor
1-21
KS-FX725R
Description of major ICs
UPD178018AGC584(IC701) : System controller micon
1.Terminal Layout
24 – 1
25
80
–
40
–
65
41 – 64
2.Description
Pin
Symbol I/O Function
No.
1 KEY0 I Key input 0
2 KEY1 I Key input 1
3 KEY2 I Key input 2
4 LEVEL I Level meter input
5 SM I Signal meter input
6 SQ I Signal quality input
7 LCDCE O Chip enable output to LCD driver
8 LCDDA O Data output to LCD driver
9 LCDSCK O Clock output to LCD driver
10 BUSI/O O J-BUS I/O switch output
11 UNLOCK O PLL unlock output L:unlock H:lock
12 BUSSI I J-BUS data input
13 BUSSO O J-BUS data output
14 BUSSCK O J-BUS clock output
15 - 20 NC - Non connect
21 GNDPORT - GND for port
22 VDDPORT - VDD for port
23 NC - Non connect
24 AFCK O AF check output L:AF check
25 MONO O Monaural ON/OFF output H:Monaural ON
26 FM/AM O Output for FM power supply H:FM Mode
27 SEEK/STOP O Auto seek/Stop output H:Aut seek L:Stop
28 NC I Non connect
29 IFC I FM middle frequency counter input
30 VDDPLL - VDD for PLL
31 OSC I FM/AM oscillation input
32 NC - Non connect
33 GNDPLL - GND for PLL
34 EO0 O Error out output from change pump
35 EO1 O Error out output from change pump
36 IC - Connect to Ground
37 SD/ST I Seek/Stop port H:SD input
Seek/Stop port L:Stereo input
38 STAGE I H:It is CD mode and there is REPEAT
L:Does not exist
39 NC - Non connect
40 MOTOR O Main motor output H:At rotation
41 FF/REW O MS IC sensitivity switch output L:FF/REW
42 F/R O FWD/REV change input H:FWD L:REV
Pin
Symbol I/O Function
No.
43 DOLBY O Dolby NR output H:Dolby NR ON
44 MS IN I Between tunes signal input
H:Between tunes
45 I2CSCK I/O E-VOL IC control clock I/O
46 I2CDAO O E-VOL IC control data output
47 I2CDAI I E-VOL IC control data input
48 REEL I Reel rotation detect signal input
49 SUBMO- O Sub motor output 50 SUBMO+ O Sub motor output +
51 MODE I Mode position detection input H:Non-mode
L:Mode position
52 TAPEIN I Cassette in detect input H:IN L:OUT
53 STBY I Standby detect input H:Eject side
L:Operation side
53 T-END I Tape end detect input 200ms L:tape end
54-59 NC - Non connect
60 MUTE O L:Mute ON H:Mute OFF
61 POWER O Power supply output H:power ON
62 TEL-MUTE I TEL-MUTE input
63, 64 NC - Non connect
65 ENC1 I Encoder signal input
66 ENC2 I Encoder signal input
67 ON I H:Operation mode L:Power save mode
68 STOP I Stop mode input
69 RDSCK I RDS clock input
70 RDSDA I RDS data input
71 REMOCON I Remocon signal input (Not used)
72 DETACH I Detach input It is "L" of 200ms or more and
an operation mode H:power save mode
73 JBUS INT I J-BUS Interruption input
74 REGCPU - Connects GND through the capacitor
of 0.1 F
75 GND - To ground
76 X2 - Crystal oscillator connection for system
77 X1 - clock oscillation
78 REGOSC - Connects GND through the capacitor
of 0.1 F
79 VDD - Power supply
80 NC - Non connect
1-22
HA13158A (IC941) : Power amp
1. Pin layout
1 ~ 23
2. Block diagram
14 18 6
INVCC
INPUTBUFFER1
IN1
2
STBY
1
PVCC1PVCC2
AMP1
KS-FX725R
3
+
4
-
5
IN2
IN3
IN4
11
13
23
10
MUTE
INPUTBUFFER2
INPUTBUFFER3
INPUTBUFFER4
PROTECTOR (ASO
SURGE, TSD)
12 22
AMP2
AMP3
AMP4
TAB
7
+
8
-
9
15
+
16
-
17
19
+
20
-
21
1-23
KS-FX725R
CXA2559Q(IC401):Playback equalizer amplifier with music sensor
1.Pin layout
40 31
1
30
10
11 20
2.Blockdiagram
PBFB2
PBRIN2
PNGND
PNFIN2
VCT
PBREF
PBFIN1
PBGND
PBRIN1
PBFB1
21
31
32
33
34
35
36
37
38
39
40
45k
PBTC2
30
7k/12k
300k
F2
30k
30k
F1
300k
7k/12k
PBOUT2
OUTREF2
29
28
-
+
+
-
TAPEIN2
27
100k
70 /12070 /120
T2
X1
X1
T1
100k
GND
26
FWD/RVS
LPF
DIREF
25
BIAS
MUTE
TAPE EQ
Vcc
+
-
F3
LINEOUT2NCNC
24
23
24dB
-
+
MS MODE
DET
+
-
24dB
22
MSSW
21
MS ON/
OFF
20
19
18
17
16
15
14
13
12
11
MSMODE
DRSW
TAPESW
MUTESW
NC
NC
MSOUT
MSTC
G1FB
G2FB
1-24
1
2
PBTC1
PBOUT1
3
4
TAPEIN1
OUTREF1
5
NC
6
NC
7
8
NC
LINEOUT1
9
NC
10
MSLPF
KS-FX725R
3.Pin function
Pin No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
1
2
3
4
5
6
7
8
9
Symbol
PBTC1
PBOUT1
OUTREF1
TAPEIN1
Vcc
NC
LINEOUT1
NC
NC
MSLPF
G2FB
GI1FB
MSTC
MSOUT
NC
NC
MUTESW
TAPESW
DRSW
MSMODE
MSSW
NC
NC
LINEOUT2
DIREF
GND
TAPEIN2
OUTREF2
PBOUT2
PBTC2
PBFB2
PNRIN2
PBGND
PBFIN2
VCT
PBREF
PBFIN1
PBGND
PBRIN1
PBFB1
I/O
Function
-
Terminal of capacity of reproduction equalizer reproduction
O
Equalizer output terminal
O
Output standard terminal
I
Tape input terminal
-
Power supply terminal
-
Non connection
O
Line-out output terminal
-
Non connection
-
Non connection
-
Detection LPF terminal between tunes
-
Detection level set terminal between tunes
-
Detection level set terminal between tunes
-
Time constant connection terminal for the detection between tunes
O
Detection output terminal between tunes
-
Non connection
-
Non connection
I
Mute function control terminal
I
Reproduction equalizer control terminal
I
Head change control terminal
I
Detection mode control terminal between tunes
Detection function control terminal between tunes
I
Non connection
Non connection
Line-out output terminal
O
Resistance connection terminal for standard current setting
Earth terminal
Tape input terminal
I
Output standard terminal
O
Reproduction equalizer output terminal
O
Terminal of capacity of reproduction equalizer
Reproduction equalizer return terminal
I
Reproduction equalizer input terminal
I
Reproduction equalizer system earth terminal
Reproduction equalizer input terminal
I
Middle point terminal
O
Reproduction equalizer standard terminal
O
Reproduction equalizer input terminal
I
Reproduction equalizer system earth terminal
Reproduction equalizer input terminal
I
Reproduction equalizer return terminal
I
CXA2559Q 2/2
1-25
KS-FX725R
HA13164(IC961):REGULATOR
1.Terminal layout
1 2 3 4 5 6 7 8 9 101112131415
2.Block diagram
ANT OUT
C3
0.1u
EXT OUT
C4
0.1u
ANT CTRL
CTRL
CD OUT
C5
0.1u
AUDIO OUT
C6
10u
11
12
10
BATT.DET OUT
9
COMPOUT
6
VDD OUT
4
SW5VOUT
5
14
UNIT R:
+B
ACC
ILMOUT
R1
C7
0.1u
C8
0.1u
C1
100u
VCC ACC
8
2
1
7
Surge Protector
BIAS TSD
15
3
note1) TAB (header of IC)
connected to GND
ILM AJGND
13
C2
0.1u
C:F
1-26
3.Pin function
Pin No. Symbol Function
1
2
EXTOUT
ANTOUT
Output voltage is VCC-1 V when M or H level applied to CTRL pin.
Output voltage is VCC-1 V when M or H level to CTRL pin and H level
to ANT-CTRL.
3
4
5
6
7
8
9
10
11
12
13
14
15
ACCIN
VDDOUT
SW5VOUT
COMPOUT
ANT CTRL
VCC
BATT DET
AUDIO OUT
CTRL
CD OUT
ILM AJ
ILM OUT
GND
Connected to ACC.
Regular 5.7V.
Output voltage is 5V when M or H level applies to CTRL pin.
Output for ACC detector.
L:ANT output OFF , H:ANT output ON
Connected to VCC.
Low battery detect.
Output voltage is 9V when M or H level applied to CTRL pin.
L:BIAS OFF, M:BIAS ON, H:CD ON
Output voltage is 8V when H level applied to CTRL pin.
Adjustment pin for ILM output voltage.
Output voltage is 10V when M or H level applies to CTRL pin.
Connected to GND.
SAA6579T-X(IC761):RDS Detector
KS-FX725R
1.Terminal Layout
QUAL
RDDA
MUX
VDDA
GND
SCOUT
Vref
CIN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
RDCL
T75
OSCO
OSC1
VDD
GND
TEST
MODE
2.Pin Function
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
QUAL
RDDA
Vref
MUX
VDDA
GND
CIN
SCOUT
MODE
TEST
GND
VDD
OSC1
OSC0
T75
RDCL
FunctionI/OSymbol
Non connect
RDS data output
O
Reference voltage output
O
Multiplex signal input
I
+5V Supply voltage for analog
Ground for analog part (0V)
Sub carrier output of reconstruction filter
I
Ground for digital part (0V)
O
Ground for digital part (0V)
Ground for digital part (0V)
Ground for digital part (0V)
+5V supply voltage for digital part
Oscillator input
I
Oscillator output
O
Non connect
RDS clock output
O
3.Block Diagram
4
8
7
5
3
ANI-
ALLUDING
FILTER
CLOCKED
COMPARATOR
REFERENCE
VOLTAGE
1413
5kHz
BAND PASS
(8th ORDER)
COSTAS LOOP
VARIABLE AND
FIXWD DIVIDER
CLOCK
REGENERATION
AND SYNC
6
RECONSTRUCTION
FILTER
BIPHASE
SYMBOL
DECODER
TEST LOGIC AND OUTPUT
OSCILLATOR
AND
DIVIDER
SELECTOR SWITCH
9
10
12
DUALITY BIT
GENERATOR
DIFFERENTIAL
DECODER
11
1
2
16
15
1-27
KS-FX725R
TEA6320T-X (IC911) : E.volume
1.Pin layout
SDA
1
GND
2
OUTLR
OUTLF
MUTE
TL
B2L
B1L
IVL
ILL
QSL
IDL
ICL
IMD
IBL
IAL
3
4
5
6
7
8
9
10
11
12
13
14
15
16
3.Pin functions
CD-CH
TAPE
TUNER
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
SCL
VCC
OUTRR
OUTRF
TR
B2R
B1R
IVR
ILR
QSR
IDR
Vref
ICR
CAP
IBR
IAR
2.Block diagram
10 8 9 7 6
21
31
2
19
16
15
13
11
14
22
20
18
17
POWER
SUPPLY
SOURCE
SELECTOR
23 25 24 26 27 28
VOLUME 1
+20 to -31 dB
LOUDNESS
LEFT
VOLUME 1
+20 to -31 dB
LOUDNESS
RIGHT
BASS
LEFT
+15 dB
LOGIC
BASS
RIGHT
+15 dB
5
TREBLE
LEFT
+12 dB
TREBLE
RIGHT
+12 dB
12
MUTE
FUNCTION
ZERO CROSS
DETECTOR
VOLUME 2
0 to 55 dB
BALANCE
FENDER REAR
VOLUME 2
0 to 55 dB
BALANCE
FENDER FRONT
HC BUS
REC
VOLUME 2
0 to -55dB
BALANCE
FENDER FRONT
VOLUME 2
0 to -55dB
BALANCE
FENDER REAR
3
4
32
1
29
30
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Symbol
SDA
GND
OUTLR
OUTLF
TL
B2L
B1L
IVL
ILL
QSL
IDL
MUTE
ICL
IMO
I/O
Serial data input/output.
I/O
Ground.
output left rear.
O
output left front.
O
Treble control capacitor left channel or
I
input from an external equalizer.
Bass control capacitor left channel or
-
output to an external equalizer.
Bass control capacitor left channel.
Input volume 1. left control part.
I
Input loudness. left control part.
I
Output source selector. left channel.
O
Not used
Not used
Input C left source.
I
Not used
-
Functions Functions
Pin
No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Symbol
IAR
IBR
CAP
ICR
Vref
IDR
QSR
ILR
IVR
B1R
B2R
TR
OUTRF
OUTRR
I/O
I
Input A right source.
I
Input B right source.
-
Electronic filtering for supply.
I
Input C right source.
-
Reference voltage (0.5Vcc)
-
Not used
O
Output source selector right channel.
I
Input loudness right channel.
I
Input volume 1. right control part.
-
Bass control capacitor right channel
Bass control capacitor right channel or
O
output to an external equalizer.
Treble control capacitor right channel or
I
input from an external equalizer.
O
Output right front.
O
Output right rear.
1-28
15
16
IBL
IAL
Input B left source.
I
Input A left source.
I
31
32
Vcc
SCL
-
Supply voltage.
I
Serial clock input.
LC75823E (IC651) : LCD Driver
1. Pin Layout & Symbol
KS-FX725R
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
2. Pin Function
DICLCE
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
S17
S18
S19
OSC
S20
Vss
S21
VDD2
VDD1
S22
S23
INH
S24
VDD
S25
COM3
COM2
S26
S27
COM1
S52
S28
S29
S51
S30
S50
S31
S49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
S32
S48
S47
S46
S45
S44
S43
S42
S41
S40
S39
S38
S37
S36
S35
S34
S33
Pin No.
1 to 52
53 to 55
56
57
58
59
60
61
62
63
Symbol
S1 to S52
COM1 to COM3
VDD
INH
VDDD1
VDD2
Vss
OSC
CE
CL
I/O
O
Segment output pins used to display data transferred
Function
by serial data input.
O
Common driver output pins. The frame frequency is given
by : t0=(fosc/384)Hz.
--
Power supply connection. Provide a voltage of between
4.5 and 6.0V.
I
Display turning off input pin.
INT="L" (Vss) ----- off (S1 to S52, COM1 to COM3="L"
INT="H" (VDD)----- on
Serial data can be transferred in display off mode.
I
Used for applying the LCD drive 2/3 bias voltage
externally.
Must be connected to VDD2 when a 1/2 bias drive scheme
is used.
I
Used for applying the LCD drive 1/3 bias voltage
externally.
Must be connected to VDD1 when a 1/2 bias drive scheme
is used.
--
Power supply connection. Connect to GND.
I/O
Oscillator connection.
An oscillator circuit is formed by connecting an external
resistor and capacitor at this pin.
Serial data CE : Chip enable
interface connection
I
to the controller. CL : Sync clock
64
DI
DI : Transfer data
1-29
KS-FX725R
HD74HC126FP-X (IC751) : Buffer
1.Terminal layout
1
2
3
4
5
6
7
2.Block diagram
Input
14
13
12
11
10
9
8
Vcc Vcc
1A
2A
3A
4A
1C
2C
3C
See Function Table
4C
3.Pin function
Output
1Y
2Y
Output
2Y
Output
3Y
Output
4Y
Input Outout
C
A
L
X
H
L
H
H
Y
Z
H
L
1k
S1
CL
1k
Sample as Load Circuit 1
Sample as Load Circuit 1
Sample as Load Circuit 1
LB1641 (IC402) : DC motor driver
1. Pin layout
1 2 3 4 5 6 7 8 9
GNDOUT1 P1
VZ IN1 IN2
VCC1
2. Pin function
Input Output
IN1 IN2 OUT1 OUT2
0 0 0 0
1 0 1 0
0 1 0 1
1 1 0 0
1-30
10
VCC2 P2
OUT2
Mode
Brake
CLOCKWISE
COUNTER-CLOCKWISE
Brake
Loading...