Safety precautions
Preventing static electricity
Important for laser products
Disassembly method
Adjustment Method 1
(CD/MD section)
Adjustment Method 2
(Cassette mechanism section)
Flow of functional operation
until TOC read (CD)
1-2
1-3
1-5
1-6
1-35
1-38
1-40
COLOR
DIMMER
REV.MODE
STANDBY/ON
CLOCK
FM MODE
MD GROUP
SLEEP
/TIMER
MD TITLE
MARK
1 2 3
IMPUT/EDIT
DISPLAY
4 5 6
/CHARA
MD TITLE
7 8 9
SEARCH
SET
10
0
+
10
CANCEL
ENTER
REPEAT
PLAY MODE
FM/AM
CD
MD
TAPE
/AUX
BEEP
SOUND
AHB
VOLUME
MODE
PRO
RM-SUXF70MDU
SP-UXF72MD
PHONES
CA-UXF72MDCA-UXF70MDSP-UXF70MDSP-UXF70MD
MICRO COMPONENT MD SYSTEM UX-F72MD
COMPACT
DIGITAL AUDIO
STANDBY/ON
Area Suffix
UB
UF
Flow of functional operation
until TOC read (MD)
Maintenance of laser pickup
Replacement of laser pickup
Maintenance of MD pickup
Procedures of changing
the MD pickup
Description of major ICs
SP-UXF72MD
Hong Kong
China
1-41
1-42
1-42
1-43
1-43
1-44~71
This service manual is printed on 100% recycled paper.
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
No.21028
1-1
Sep. 2001
Page 2
UX-F70MD/UX-F72MD
Safety Precautions
1. This design of this product contains special hardware and many circuits and components specially
for safety purposes. For continued protection, no changes should be made to the original design
unless authorized in writing by the manufacturer. Replacement parts must be identical to those
used in the original circuits. Services should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of
the product should not be made. Any design alterations or additions will void the manufacturer`s
warranty and will further relieve the manufacture of responsibility for personal injury or property
damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics.
These characteristics are often not evident from visual inspection nor can the protection afforded
by them necessarily be obtained by using replacement components rated for higher voltage,
wattage, etc. Replacement parts which have these special safety characteristics are identified in
the Parts List of Service Manual. Electrical components having such features are identified by
shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a
substitute replacement which does not have the same safety characteristics as the recommended
replacement parts shown in the Parts List of Service Manual may create shock, fire, or other
hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the
like to be separated from live parts, high temperature parts, moving parts and/or sharp edges
for the prevention of electric shock and fire hazard. When service is required, the original lead
routing and dress should be observed, and it should be confirmed that they have been returned
to normal, after re-assembling.
After re-assembling the product, always perform an isolation check on the exposed metal parts
of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control
shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure
the leakage current from each exposed metal parts of the cabinet , particularly any exposed
metal part having a return path to the chassis, to a known good earth ground. Any leakage
current must not exceed 0.5mA AC (r.m.s.)
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms
per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by
a 0.15 F AC-type capacitor between an exposed
metal part and a known good earth ground.
Measure the AC voltage across the resistor with the
AC voltmeter.
Move the resistor connection to eachexposed metal
part, particularly any exposed metal part having a
return path to the chassis, and meausre the AC
voltage across the resistor. Now, reverse the plug in
the AC outlet and repeat each measurement. voltage
measured Any must not exceed 0.75 V AC (r.m.s.).
This corresponds to 0.5 mA AC (r.m.s.).
0.15 F AC TYPE
1500 10W
Good earth ground
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
Place this
probe on
each exposed
metal part.
CAUTION
!
1-2
Warning
1. This equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.
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.
Page 3
UX-F70MD/UX-F72MD
Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.1. Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
1.1.1. Ground the workbench
1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over
it before placing the traverse unit (optical pickup) on it.
1.1.2. Ground yourself
1. Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
1.1.3. Handling the optical pickup
1. In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.
1.2. Handling the traverse unit (optical pickup)
1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific
details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse
unit. Be careful not to take too long a time when attaching it to the connector.
3. Handle the flexible cable carefully as it may break when subjected to strong force.
4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
1-3
Page 4
UX-F70MD/UX-F72MD
CN451
MAIN board
CN321
CD SERVO board
Pickup
Soldering part b
1.3. Cautions on removing the CD traverse unit
* For removing the CD traverse unit in detail, refer to the "Adjustment Method" section of this manual.
1. Before disconnecting the flexible wire from the connector CN601 on the CD SERVO board, solder the part shown in
the figure below.
(Note:If the flexible wire is disconnected from the CN601 without presoldering, it may cause breakdown of the CD
pickup assembly.)
2. When reassembling the CD traverse unit, be sure to remove the solder from the soldered part after reconnecting the
flexible wire to the CN601.
CD SERVO board
CD SERVO board
CN601
CN601
1-4
Soldering part
Page 5
UX-F70MD/UX-F72MD
1-5
Page 6
UX-F70MD/UX-F72MD
Disassembly method
<Main body>
Removing the rear cover
(See Fig.1 and 2)
1.
Remove the seven screws A on the back of the
body.
2.
Remove the two screws B on the bottom of the
body.
3.
Unlock the speaker terminal and the antenna
terminal, then remove the rear cover backward with
releasing the hooks.
Removing the side panels
(See Fig.3 to 5)
Prior to performing the following procedure, remove
the rear cover.
Rear cover
A
Antenna terminal
Side panel (R)
A
Speaker terminal
Fig.1
(Bottom)
B
A
A
Rear cover
1.
Remove the two screws C attaching the side panels
on the bottom of the body.
2.
Remove each side panel backward while releasing
the eight joints a as shown in Fig.4 and 5.
Joint a
Joint a
Side panel (L)
Fig.2
C
C
Side panel (R)
Side panel (L)
Fig.3
Joint a
B
Joint a
1-6
Side panel (L)
Fig.5
Side panel (R)
Fig.4
Page 7
Removing the cassette mechanism
assembly section (See Fig.6 and 7)
UX-F70MD/UX-F72MD
Cassette mechanism assembly
Prior to performing the following procedure, remove
the rear cover and the side panels.
1.
Remove the two screw D on each side of the body.
2.
Release the joint b on each side of the body and
remove the cassette mechanism assembly section in
the direction of the arrow.
3.
Disconnect the card wires from connector CN705,
CN743 and CN744 on the system control board on
the left side of the body.
Removing the fan assembly (See Fig.6)
Prior to performing the following procedure, remove
the rear panel and the right side panel.
1.
Disconnect the wire from connector CN907 on the
main board on the right side of the body.
Joint b
Fan assembly
E
CN744
CN743
D
E
Main board
CN907
Fig.6
Cassette mechanism assembly
CN705
D
Joint b
2.
Remove the two screws E attaching the fan
assembly.
Removing the MD mechanism assembly
section (See Fig.8)
Prior to performing the following procedure, remove
the rear cover, the side panels, the cassette
mechanism assembly section and the fan assembly.
1.
Disconnect the card wire from connector CN721 on
the system control board.
2.
Disconnect the card wire from connector CN522 on
the underside of the MD mechanism assembly
section.
3.
Remove the four screws F and the MD mechanism
assembly section upward.
System control board
System
control board
CN721
F
F
Fig.7
MD mechanism assembly
CN522
F
F
Fig.8
Front panel
1-7
Page 8
UX-F70MD/UX-F72MD
Removing the system control board
(See Fig.9)
Prior to performing the following procedure, remove
the rear cover, the side panels and the cassette
mechanism assembly section.
1.
Remove the screw G on the left side of the body.
2.
Disconnect the card wire from connector CN701 and
CN721on the system control board.
3.
Disconnect connector CN709, CN711 and CN712 on
the system control board from the body outward.
4.
Disconnect the card wire from connector CN704 on
the underside of the system control board.
System control board
CN712
CN711
CN701
CN721
CN709
Removing the tuner board (See Fig.10)
Prior to performing the following procedure, remove
the rear cover and the right side panel.
1.
Disconnect the card wire from connector CN1 on the
tuner board on the right side of the body.
2.
Remove the screw H and remove the tuner board
upward while disengaging the three joint c.
CN704
CN1
G
Fig.9
Tuner board
H
Joint c
1-8
Fig.10
Page 9
UX-F70MD/UX-F72MD
Removing the front panel assembly
(See Fig.11 and 12)
Prior to performing the following procedure, remove
the rear cover, the side panels, the cassette
mechanism assembly section and the system control
board.
1.
Release the two joints d on the lower right and left
sides of the front panel assembly, then remove the
front panel assembly toward the front.
Front panel assembly
Joint d
Fig.11
Front panel assembly
Removing the headphone jack board
(See Fig.13 and 14)
Prior to performing the following rear cover, the side
panels, the cassette mechanism assembly section,
the system control board and the front panel
assembly section.
1.
Disconnect the wire from connector CN804 on the
main board.
2.
Remove the plastic rivet fixing the headphone jack
board.
Joint d
Fig.12
Main board
CN804
Headphone jack board
Fig.13
Plastic rivet
Headphone jack board
Fig.14
1-9
Page 10
UX-F70MD/UX-F72MD
Removing the main board / the heat sink
(See Fig.15 to 17)
Prior to performing the following procedure, remove
the rear cover, the side panels, the cassette
mechanism assembly section, the system control
board and the MD mechanism assembly section.
1.
Remove the screw I attaching the main board.
2.
Remove the screw H attaching the grounding
terminal extending from the main board.
3.
Disconnect the wire from connector CN804 on the
main board.
4.
Disconnect connector CN805 on the main board
from the AC jack board while pulling out it. Remove
the main board in the direction of the arrow and
disconnect the wire from connector CN803 on the
reverse side of the main board.
5.
Remove the three screws J attaching the heat sink
on the reverse side of the main board.
H
Main board
Main board
CN805
CN805
CN803
CN803
I
CN804
AC jack board
Fig.15
Removing the AC jack board
(See Fig.18 and 19)
Prior to performing the following procedure, remove
the rear cover, the side panels, the cassette
mechanism assembly section, the system control
board, the MD mechanism assembly section and the
main board / the tuner board.
1.
Disconnect the wire from connector CN809 on the
AC jack board.
2.
Remove the screw K and screw L attaching the AC
jack board.
AC jack board
K
CN804
Heat sink
Power transformer assembly
J
Heat sink
Fig.16
Main board
Fig.17
CN809
1-10
AC jack board
L
CN809
Fig.19
Fig.18
Page 11
UX-F70MD/UX-F72MD
Removing the power transformer
assembly (See Fig.20)
Prior to performing the following procedure, remove
the rear cover, the side panels, the cassette
mechanism assembly section, the system control
board, the MD mechanism assembly section and the
main board.
1.
Disconnect the wire from connector CN809 on the
AC jack board.
2.
Cut off the band setting the wire on the CD
mechanism cover.
3.
Remove the four screws M attaching the power
transformer assembly.
Removing the CD mechanism assembly
(See Fig.21 to 23)
Power transformer
assembly
CD mechanism cover
Band
M
M
CD mechanism cover
Fig.20
AC jack board
CD mechanism assembly
CN809
Band
Notch
Headphone
jack board
Prior to performing the following procedure, remove
the rear cover, the side panels, the cassette
mechanism assembly section, the system control
board, the front panel assembly section, the MD
mechanism assembly section, the main board / the
tuner board and the AC jack board.
1.
Cut off the band setting the wire on CD mechanism
cover.
2.
Release the wire extending from the headphone jack
board from the three notches of the CD mechanism
cover on the left side of the body.
3.
Remove the four screws N on the left and right side
of the CD mechanism cover. Then remove the CD
mechanism cover upward.
4.
Remove the three screws O attaching the CD
mechanism assembly.
N
Notches
Fig.21
CD mechanism cover
CD mechanism assembly
Band
N
Fig.22
O
O
CD mechanism assembly
Fig.23
1-11
Page 12
UX-F70MD/UX-F72MD
<MD mechanism assembly section>
Prior to performing the following procedure, remove
the rear cover, the side panels, the cassette
mechanism assembly section, the fan assembly and
the MD mechanism assembly section.
Removing the MD mechanism assembly
(See Fig.24 to 26)
1.
Remove the four screws P attaching the brackets
(1) and (2) on the left and right side of the MD
mechanism assembly.
2.
Disconnect the card wire from connector CN521 on
the MD mechanism board.
3.
Remove the MD mechanism bottom cover
downward.
MD mechanism assembly
P
brackets (1)
Fig.24
MD mechanism assembly
P
CN521
brackets (2)
Fig.25
MD mechanism assembly
MD mechanism bottom cover
1-12
Fig.26
Page 13
<Front panel assembly section>
UX-F70MD/UX-F72MD
Prior to performing the following procedure, remove
the rear cover, the side panels, the cassette
mechanism assembly section, the system control
board and the front panel assembly section.
Removing the relay board (See Fig. 27)
Disconnect the wire from connector CN906, CN907
1.
and the card wire from CN908 on the relay board
respectively.
Remove the two screws Q.
2.
Removing the drive motor assembly
(See Fig.28)
Prior to performing the following procedure, remove
the relay board.
1.
Remove the four screws R attaching the drive motor
assembly.
CN907
Drive motor
assembly
Drive motor assembly
CN908
Fig.27
Q
Q
Door switch board
R
Relay board
CN906
Removing the belt and the drive motor
(See Fig.29)
REFERENCE:
1.
Remove the two screws S attaching the plate.
2.
Remove the belt from the two pulleys.
3.
Remove the two screws T attaching the drive motor.
REFERENCE:
The belt and the drive motor can be
removed respectively without removing the
drive motor assembly from the front panel
section.
When removing the drive motor only,
remove the belt from the drive motor
pulleys in advance.
Drive motor
Fig.28
Belt
T
Fig.29
R
Plate
S
1-13
Page 14
UX-F70MD/UX-F72MD
Removing the door switch board
(See Fig.30 and 31)
Prior to performing the following procedure, remove
the relay board.
1.
Loosen the screw U attaching the door switch.
2.
Remove the door switch board while releasing it from
the joint e.
CAUTION:
When reattaching the door switch board,
fit it to the joint e and check the
operating state of the switch before
tightening the screw U.
Removing the LCD section
(See Fig.32 to 34)
Prior to performing the following procedure, remove
the relay board.
1.
Loosen the two screws V attaching the lock lever.
Drive motor assembly
Switch section
U
Fig.30
Door switch board
U
Fig.31
Door switch board
Joint e
Joint e
2.
Push the part f of the lock lever in the direction of
the arrow as shown in Fig.33-1 / 33-2 and disengage
the LCD section from the front panel assembly.
CAUTION:
Because the LCD may come off, hold it
when loosening the screws V.
LCD section
Front panel assembly
Lock leverLock lever
V
Front panel assembly
Fig.32
Lock lever fLock lever f
V
1-14
Fig.34
Joint f
Fig.33-1Fig.33-2
Page 15
UX-F70MD/UX-F72MD
Removing the LCD board assembly
(See Fig.35 to 39)
Prior to performing the following procedure, remove
the relay board and the LCD section.
1.
Remove the four screws W attaching the case
cover.
2.
Remove the four screws X attaching the LCD panel
on the back of the LCD section.
3.
Remove the LCD cover.
4.
Release the joint g and remove the LCD board
assembly in the direction of the arrow.
W
X
W
Case cover
W
W
Fig.35
LCD section
Joint g
X
Fig.36
LCD panel
Fig.37
LCD board assembly
LCD cover
Fig.38Fig.39
1-15
Page 16
UX-F70MD/UX-F72MD
<Cassette mechanism assembly section>
Prior to performing the following procedure, remove
the rear cover, the side panels and the cassette
mechanism assembly section.
Removing the operation switch board
(See Fig.40)
1.
Remove the seven screws Y attaching the operation
switch board on the reverse side of the cassette
mechanism assembly.
Y
Cassette amplifier board
Y
Operation switch board
Y
Removing the cassette mechanism
assembly (See Fig.41)
1.
Remove the four screws Z on the reverse side of the
cassette mechanism assembly.
Z
Fig.40
Cassette mechanism assembly
1-16
Cassette amplifier board
Z
Fig.41
Page 17
UX-F70MD/UX-F72MD
Disassembly method
<Main body>
Removing the main board
(See Fig.1 and 2)
1.
Turn over the body and disconnect the card wire
from connector CN408 and the flexible wire from
CN407 on the main board.
2.
Remove the two screws A attaching the main board.
Slide the main board in the direction of the arrow to
release the two joints a with the single flame.
3.
Solder part b on the pickup in the body. Disconnect
the flexible harness from connector CN321 and
CN451 on the underside of the main board. Then
remove the main board.
AA
(Bottom)
Main board
CN408
CN407
Joint b Joint b
Fig.1
Main board
CN451
CN321
Removing the mechanism cover
(See Fig.3)
1.
Remove the four screws B on both sides of the
body.
2.
Move the mechanism cover toward the front to
disengage the front hook of the mechanism cover
from the internal loading assembly (Joint c). Then
remove the mechanism cover upward.
Fook
Joint c
Joint c
B
Pickup
Fig.2
Fig.3
Solder part b
Mechanism cover
B
1-17
Page 18
UX-F70MD/UX-F72MD
Removing the head lifter (See Fig.4 to 6)
1.
Move the head lifter on top of the body in the
direction of the arrow and turn around.
2.
Detach the spring from the hook of the body.
Remove the head lifter with the spring.
3.
If necessary, remove the spring from the head lifter.
Head lifter
Fig.5
Head lifter
Fig.4
Spring
Removing the head assembly (See Fig.7)
1.
Remove the screw C on the upper side of the body.
Remove the head assembly while pulling the flexible
harness from the body.
Head lifter
Spring
Fig.6
Head assembly
1-18
C
Fig.7
Page 19
Removing the Loading assembly
(See Fig.8 and 9)
Ref:
The loading assembly, the traverse mechanism
assembly and the single flame will be
removable after removing the loading assembly
from the body.
D
UX-F70MD/UX-F72MD
D
Prior to performing the following procedure, remove
the main board, the mechanism cover, the head lifter
and the head assembly.
1.
Remove the three screws D on the upper side of the
body.
2.
Move the loading assembly forward to disengage it
from the traverse mechanism assembly (Joint d).
Then remove it upward.
3.
Remove the traverse mechanism assembly from the
single flame.
Joint d
Loading assembly
D
Fig.8
Loading assembly
Fig.9
Traverse mechanism
assembly
Single flame
1-19
Page 20
UX-F70MD/UX-F72MD
<Loading assembly>
Slide base (R)
E'
Removing the slide base (L) / (R)
(See Fig.10)
1.
Remove the two screws E on the upper side of the
loading assembly.
2.
Remove the slide base (L) outward. (Release it from
the joint bosses E.)
3.
Remove the slide base (R) outward.
Removing the loading mechanism
assembly (See Fig.11)
1.
Detach the loading mechanism assembly upward to
release the four pins on both sides from the loading
motor, paying attention to the part e of the loading
mechanism base.
E
Slide base (L)
E
E'
Fig.10
Part e
Loading mechanism assembly
Removing the loading motor
(See Fig.12 and 13)
1.
Disconnect the harnesses from the wire holder and
from connector CN612 on the cam switch board.
2.
Remove the screw F attaching the loading motor
and release the joint f.
3.
Remove the belt from the loading motor assembly.
4.
Remove the two screws G attaching the loading
motor.
Removing the cam gear and the cam
switch board (See Fig.12)
Loading mechanism
assembly
Loading motor assembly
Joint f
CN612
F
Loading mechanism base
Fig.11
Wire holder
H
Cam switch board
Slit washer
H
Cam gear
Fig.12
Loading motor
1.
Remove the slit washer attaching the cam gear and
pull out the cam gear.
2.
Disconnect the harness from the wire holder and
from connector CN612 on the cam switch board.
3.
Remove the two screws H and the clamp. Remove
the cam switch board.
1-20
G
Belt
Fig.13
Page 21
Removing the cartridge holder assembly
(See Fig.14 and 15)
UX-F70MD/UX-F72MD
1.
Remove the two screws I on the upper side of the
loading assembly.
I
I
Removing the slide bar and the eject bar
(See Fig.14 and 15)
Prior to performing the following procedure, remove
the cartridge holder assembly.
Slide bar
Cartridge holder assembly
Eject bar
Eject bar
Part g
Fig.14
I
1.
Remove the slide bar upward.
2.
Move the eject bar outward until it stops as shown in
Fig.14. Push the convex part g on the bottom of the
body and remove the eject bar from the chassis.
Slide bar
k
Eject bar
UD base
Cartridge holder assembly
Fig.15
1-21
Page 22
UX-F70MD/UX-F72MD
<Traverse mechanism assembly>
Removing the Insulators (See Fig.16)
1.
Disengage the four insulators from the notches of the
traverse mechanism chassis.
Removing the pickup unit (See Fig.17)
1.
Turn over the traverse mechanism assembly and
remove the screw J attaching the shaft holder (F).
2.
Move the shaft inward and remove it from the shaft
holder (R).
Pickup unit
Insulators
Traverse machanism chassis
Fig.16
Joint h
Pickup guide
Pickup unit
Insulators
3.
Detach the shaft side of the pickup unit upward and
release the joint h with the pickup guide. Then
remove the pickup unit with the shaft.
Removing the pickup (See Fig.18)
1.
Draw out the shaft from the pickup.
2.
Remove the two screws K attaching the rack spring.
Shaft holder (F)
Rack spring
Shaft holder (R)
J
Fig.17
K
Pickup
1-22
Shaft
Fig.18
Page 23
Removing the feed motor assembly
(See Fig.19-1, 19-2)
It is not necessary to remove the pickup unit.
1.
For the white and black harnesses extending from
the feed motor assembly, unsolder the soldering i on
the traverse mechanism board.
UX-F70MD/UX-F72MD
Traberse mechanism boardSoldering j
M
2.
Remove the two screws L attaching the feed motor
assembly.
3.
Remove the two screws N attaching the feed motor
bracket.
Removing the traverse mechanism
board (See Fig.19-1)
Prior to performing procedure, remove the feed
motor assembly.
1.
For the red and black harnesses extending from the
spindle motor, unsolder the soldering j on the
traverse mechanism board.
Soldering i
Feed motor assembly
L
Fig.19-1
Feed motor
Feed motor bracket
N
2.
Remove the screw M attaching the traverse
mechanism board.
Fig.19-2
1-23
Page 24
UX-F70MD/UX-F72MD
<Reattaching the loading assembly>
1.
Reattach the eject bar to the UD base.
(Fig.15 and 20)
2.
Reattach the slide bar to the loading mechanism
chassis while fitting the boss marked k to the eject
bar slot. (Fig.20)
3.
Slide the slide bar and the eject bar in the direction
of the arrow in Fig.20 and reattach the cartridge
holder assembly using the two screws I.
(Fig.20 and 21)
ATTENTION:
Make sure the pin of the eject lever
marked l is fitted to the slot of the eject
bar marked m at the bottom of the
loading mechanism chassis after
moving the eject lever and the loading
slider of the cartridge holder assembly
in the direction of the arrow.
(Refer to Fig.21)
Slide bar
I
I
Cam switch board
H
Point marked
H
Cam switch boss
Ditch
UD base
Eject bar
Fig.20
1-24
UD base (Bottom)
Cartridge holder assembly
Ditch m
Loading slider
Eject lever
l
Fig.21
Page 25
4.
Reattach the wire holder to the UD base while
engaging the UD base hook marked u to the wire
holder slot marked t (At the same time, the boss on
the reverse side of the wire holder is fitted to the UD
base round hole).
5.
Reattach the cam switch board using the two screws
H. (Fig.22)
6.
Turn the cam switch to bring the boss to the point
marked on the cam switch board. Reattach the
cam gear using a slit washer while fitting the cam
gear slot to the cam switch boss. (Fig.22)
UX-F70MD/UX-F72MD
ATTENTION:
When reattaching the cam gear, the
cam switch boss should be fitted to the
cam gear slot, and the triangle mark of
the cam gear should be aligned to the
hole of the eject bar as shown in
Fig.22.
7.
Reattach the loading motor assembly, using the
screw F. Connect the harness extending from the
loading motor to connector CN612 on the switch
board and fix it with the wire holder. (Fig.22)
Slide barCN612
Loading motor assembly
Point marked
Boss
Cam switch
Cam switch board
F
Eject lever
Fig.22
Cam gear
n
Cam gear
(Triangle mark)
Eject lever
1-25
Page 26
UX-F70MD/UX-F72MD
8.
Reattach the UD base while engaging the four pins
on both sides of the UD base to the notches of the
loading mechanism base and placing the edge
(marked e’) of the cartridge holder assembly under
the hook e of the loading mechanism base. (Fig.23)
9.
Reattach the slide base (R) while fitting the two pins
on another side of the UD base to the slots of the
slide base (R). (Fig.24)
ATTENTION:
10.
Reattach the slide base (L) on the slide base (R)
while fitting the two pins on another side of the UD
base to the slots of the slide base (L) (Fig.25). Make
sure the two slots of the slide base (L) are fitted to
the two bosses marked E’ and tighten the two
screws E. (Fig.26)
Ref:
To expedite the work, bring up the UD base
slightly when fitting each pin to the appropriate
notch.
Fit the part v of the slide base (R) to
the part w on the inward side of the
cam gear rib. (Fig.25)
Hook e
Hook e'
Hook e'
Pin
Loading mechanism base
Fig.23
Slide base (R)
Part v
Pin
E
E'
Pin
Slide base (L)
Pin
Part w
Fig.24
Slide base (L)Slide base (R)
Slide base (R)
Cam gear
E
Part v
Part w
1-26
E'
Fig.25Fig.26
Page 27
UX-F70MD/UX-F72MD
<Cassette Mechanism Section>
Removing the Recording, Playback / Erasing
Head (Refer to Figs. 1 to 3.)
1. Shifting the trigger arm seen in the right side of the
head mount in the arrow-marked direction, turn the
flywheel (R) counterclockwise until the head mount
clicks while moving frontwards. (See Fig. 1.)
2. Turn the flywheel (R) counterclockwise. The
playback head accordingly turns counterclockwise
from the position shown in Fig. 2 to that in Fig. 3.
3. Leaving the playback head in the position shown in
Fig. 3, disconnect the flexible wire coming from the
playback head from the connector CN31 on the
head amplifier & mechanism control P.C. board.
4. Remove the flexible wire from the hook b of the
chassis base.
5. Remove the spring a from the back of the head.
Cassette mechanism
Head mount
Head (REC, PB/Erasing)
Flexible wire
Flywheel (R)
Trigger arm
Fig. 1
Spring a
Trigger arm
6. Loosen the reversing azimuth screw A that fastens
the head.
7. Remove the recording, playback/erasing head from
the front side (head side) of the head mount.
Reinstalling the Recording, Playback /
Erasing Head
1. Install the recording, playback/erasing head from the
front side of the head mount as shown in Fig. 3.
2. Tighten the reversing azimuth screw A.
3. Install the spring a from the back of the head.
4. Set the flexible wire at the hook b of the chassis
base.
5. Connect the flexible wire coming from the head to
the connector CN31 on the head amplifier &
mechanism control P.C. board.
Head amp. & mechanism
control P.C. board
Head (REC, PB/Erasing)
Spring a
Flexible wire
Hook b
Hook b
Flywheel (R)
Fig. 2
Reversing azimuth
screw A
Head mount
Head amp. & mechanism
control P.C. board
Fig. 3
1-27
Page 28
UX-F70MD/UX-F72MD
Removing the Head Amplifier & Mechanism
Control P.C. Board (Refer to Figs. 4 and 5.)
1. Disconnect the flexible wire from the connector
CN31 on the head amplifier & mechanism control
P.C. board mounted on the back of the cassette
mechanism assembly.
2. Remove the three screws B fastening the head
amplifier & mechanism control P.C. board.
3. Disconnect the connector CN32 of the head
amplifier & mechanism control P.C. board from the
connector CN1 on the reel pulse P.C. board.
Note: Remove the 4-pin parallel wire soldered to the
main motor depending on the situation.
Removing the Main Motor Assembly (Refer
to Figs. 4 to 7.)
The main motor assembly can be removed without
removal of the head amplifier & mechanism control
P.C. board.
Head amp. & mechanism
control P.C. board
BB
B
Flexible P.C. board4-pin parallel wire
Fig. 4
Main motor assembly
Capstan belt
Main motor assembly
Belt
Main motor
assembly
C
C
1. Remove the two screws C fastening the main motor
assembly.
2. Lifting the main motor assembly slightly upwards,
disengage the capstan belt from the motor pulley.
Note: Be careful not to soil the capstan belt with grease
or the like. When reinstalling the main motor
assembly, refer to Fig. 6 and Fig. 7 for engaging
the capstan belt.
Capstan belt
Main motor assembly
Motor pulley
Fig. 5
Main motor assembly
Motor pulley
Fig. 6
1-28
Flywheel
Capstan belt
Motor pulley
Fig. 7
Page 29
UX-F70MD/UX-F72MD
Removing the Flywheel (Refer to Figs. 8
and 9.)
Remove the head amplifier & mechanism control
P.C. board.
Remove the main motor assembly.
1. Remove the slit washers c and d that fasten the
capstan shafts (L) and (R) from the front side of the
cassette mechanism assembly, and then draw out
the flywheels (L) and (R) from the back side of the
cassette mechanism assembly in the arrow-marked
direction for removing them.
Removing the Reel Pulse P.C. Board /
Solenoid (Refer to Fig. 10.)
Remove the head amplifier & mechanism control
P.C. board.
Remove the main motor assembly.
1. Remove the screw D fastening the reel pulse P.C.
board.
Flywheel (R)
Capstan
shaft (R)
Slit washer d
Fig. 8
Flywheel (L)
Capstan
shaft (L)
Slit washer c
2. Disengage the five hooks e that retain the reel
pulse P.C. board by pressing each in the arrowÂmarked direction.
3. Disengage the two hooks f that retain the solenoid
by pressing each from the front side of the cassette
mechanism assembly in the arrow-marked
direction.
Note: When reinstalling the reel pulse P.C. board and
solenoid, make sure that the hook g of the
solenoid is properly engaged.
Hook e
Hook f
Hook f
Hook e
Flywheel (R)
Flywheel (L)
Fig. 9
Hook e
Reel pulse P.C. board
D
1-29
Page 30
UX-F70MD/UX-F72MD
Disassembly Method
<CD Mechanism Assembly>
Removing the CL. Base Assembly and Tray
(Refer to Figs. 1 to 5.)
1. Remove the two screws A fastening the CL. base
assembly from the top of the CD mechanism
assembly.
CL. base assembly
A
Hook a
A
Hook a
2. Move the CL. base assembly diagonally upwards
as indicated by the arrow to release it from the two
hooks a.
3. Turn the idle gear in the arrow-marked direction
from the upper side of the CD mechanism
assembly. Accordingly, the TRAMECHA assembly
moves downwards.
Note: When drawing out the tray, shift down the
TRAMECHA assembly to the position where
the tray does not contact the T-T assembly
of the TRAMECHA assembly.
4. Draw out the tray frontwards for removing it.
Note: When reinstalling the tray:
Turn the idle gear so that the part b of the
tray gear is positioned in the part c shown in
Fig. 4. (Eject position)
Engage the right and left hooks d and e of
the tray with the right and left grooves of the
TRAMECHA assembly respectively for
retaining the tray.
Fig. 1
Idle gear
TRAMECHA
assembly
Tray
Fig. 2
TRAMECHA assembly
1-30
Hook d
Idle gear
Tray gear
Hook d
Tray
Tray gear
Idle gear
Tray
Fig. 3
Part c
Part b
Fig. 4Fig. 5
Page 31
UX-F70MD/UX-F72MD
Removing the TRAMECHA Assembly
(Refer to Figs. 6 to 9.)
Remove the CL. base assembly and tray.
Reference: The TRAMECHA assembly can be
removed without removal of the
mechanism P.C. board.
1. If the TRAMECHA assembly is lowered and it is
located out of the PLAY position, turn the idle gear
in the arrow-marked direction so that the hole in the
part f of the tray gear meets the hole on the CL.
base assembly. (Set the TRAMECHA assembly at
the PLAY position.)
2. Remove the three screws B fastening the
TRAMECHA assembly and then remove the
TRAMECHA assembly upwards from the front side.
3. At the same time, remove the spring from the groove of
the CH. base assembly in the part g of the TRAMECHA
assembly.
Note: When reinstalling the TRAMECHA assembly:
Check to see if the spring is properly
engaged with groove of the CH. base
assembly in the part g of the TRAMECHA
assembly.
After making sure that the three insulators of
the TRAMECHA assembly are properly set
on the bosses of the L. base assembly's
guide, fasten them with the screws.
TRAMECHA
assembly
B
Part g
L. base assembly
B
Fig. 6
Fig. 7
B
Idle gear
Tray gear
Tray gear
Part f
Spring
Part g
Fig. 8
Spring
Groove of CH. base assembly
Fig. 9
1-31
Page 32
UX-F70MD/UX-F72MD
Removing the Mechanism P.C. Board
(Refer to Fig 10.)
Reference:The mechanism P.C. board can be
removed without removal of the
TRAMECHA assembly.
C
Flexible wire
Shorting round
Note: Before disconnecting the flexible wire coming
from the pickup from the connector, be sure to
solder its shorting round.
If the flexible wire is connected without
soldering, it may cause breakdown of the
pickup.
1. Solder the shorting round of the flexible wire
connected with the mechanism P.C. board from the
back of the mechanism assembly.
2. Disconnect the flexible wire from the connector
CN601 on the mechanism P.C. board.
3. Remove the three screws C fastening the
mechanism P.C. board.
4. Unsolder the two points of the part h and one point
of the part i of the mechanism P.C. board. Then,
remove the mechanism P.C. board upwards.
Note: When reinstalling the mechanism P.C. board,
connect the flexible wire coming from the
pickup to the connector first and then remove
the solder from the shorting round of the
flexible cable.
Soldered
part h
C
CN601 on
mechanism
P.C. board
C
Soldered part i
Fig. 10
1-32
Page 33
UX-F70MD/UX-F72MD
Removing the Pickup
(Refer to Figs. 11 to 14.)
Remove the CL. base assembly and tray.
Remove the TRAMECHA assembly.
Reference: The pickup can be removed without
removal of the mechanism P.C. board.
Note: Before disconnecting the flexible wire coming
from the pickup from the connector, be sure to
solder its shorting round.
If the flexible wire is connected without
soldering, it may cause breakdown of the
pickup.
1. Solder the shorting round of the flexible wire
connected with the mechanism P.C. board from the
back of the TRAMECHA assembly.
2. Disconnect the flexible wire from the connector
CN601 on the mechanism P.C. board.
Part j of
rack plate
CH. base
assembly
Flexible wire
Shorting round
CN601 on
mechanism
P.C. board
Fig. 11
T-T assembly
Pickup assembly
3. Turn the idle gear in the arrow-marked direction from
the top of the TRAMECHA assembly so that the
pickup assembly is shifted to the reverse side of the
T-T assembly.
Move the pickup assembly until the part j of the rack
plate in the lower part of the pickup assembly comes
out of the CH. base assembly.
4. Remove the two screws D retaining the shaft of the
pickup assembly. Next, disengage the hook k from
the CH. base assembly and then remove the pickup
assembly together with the shaft.
5. Pull the shaft out of the pickup.
6. Remove the two screws E fastening the rack plate
from the pickup.
7. Remove the screw F retaining the P.S. spring from
the pickup.
D
Idle gear
Shaft
Fig. 12
Pickup assembly
Par t k
CH. base
assembly
D
Fig. 13
Pickup
Par t j
Rack plate
P.S. spring
F
E
Fig. 14
1-33
Page 34
UX-F70MD/UX-F72MD
Reinstalling the Pickup Assembly
(Refer to Figs. 15 and 16.)
Reference: Refer to the explanation of "Removing
the Pickup" on the preceding page.
1. Fit the P.S. spring and rack plate to the pickup.
2. Insert the shaft into the pickup.
3. Engage the hook k of the pickup assembly with the
CH. base assembly first, and set the part j of the
rack plate in the opening I next. Then, reinstall the
pickup assembly while shifting it to the T-T side
(inward) so that the part m of the rack plate is
positioned as shown in Fig. 16.
4. Move the pickup assembly to the center position
and fasten the shaft with the two screws D. (Make
sure that the part n of the rack plate is correctly
engaged with the middle gear.)
5. After passing the flexible wire coming from the
pickup through the opening of the CH. base
assembly, connect it to the connector CN601.
Part I
Part j
Part m
Part k
Pickup
assembly
CH. base
assembly
Fig. 15
Middle gear
Note: When reinstalling the pickup assembly,
remove the solder from the shorting round
after connecting the flexible wire coming from
the pick to the connector CN601.
Removing the Feed Motor Assembly
(Refer to Fig. 17.)
Remove the CL. base assembly and tray.
Remove the mechanism P.C. board.
Remove the two screws E fastening the feed motor
assembly from the top of the mechanism assembly.
Rack plate
Part n
Fig. 16
E
Feed motor assembly
1-34
Fig. 17
Page 35
Adjustment Method 1 (CD/MD section)
1. Jigs and test instruments
Laser power meter
Laser power meter sensor (or disk sensor)
Premastered disk (MRG-1018)
Recordable disk (MDW-74/AU1)
2. Adjustment and check items
1) Indications in the modes that all LCD's are on
2) CD section
(1) Indication of the C1 error
(2) Cancel of the C1 error indication
3) MD section
(1) Setup of the TEST MODE 1
(2) Initialization of the EEPROM
(3) Adjustment of the laser power
(4) Adjustment of the disk
(5) Setup of the TEST MODE 2
(6) Indication of variation in the pickup adjustment value
(7) Indication of the C1 error
(8) Cancel of the TEST MODE
UX-F70MD/UX-F72MD
3. Adjustment and check method
1) CD section
(1) Indication of the C1 error
While pressing both the POWER key
and BACK SKIP key on the main unit,
turn on the primary power supply.
FL indication
CRC = 0
Press the CD OPEN/CLOSE key
and insert the test disk.
Press the CD PLAY key. The set starts
counting and the number of error correction
times is indicated every 10 seconds.
FL indication
CRC = ***
200 Hz or less
(2) Cancel of the C1 error indication
To cancel the C1 error indication, cut off the power supply.
1-35
Page 36
UX-F70MD/UX-F72MD
2) MD section
(1) Setup of the TEST MODE 1
While pressing both the POWER
key and FORWARD SKIP key, turn
on the primary power supply.
FL indication
MD TEST MODE 1
Setup is complete.
(3) Adjustment of the playback laser power
Set up the MD TEST MODE 1.
(2) Initializing the EEPROM
(For initializing the EEPROM,
it is the prerequisite that the
test mode has been
completely set up. Use the
remote controller for the
following operation.)
Among the keys on the main
unit, only the EJECT key is
used for ejecting the disk.)
(4) Adjustment of the recording laser power
Set up the MD TEST MODE 1.
Initialization of the EEPROM
Press the OPEN/CLOSE
key on the main unit.
Press the REC SPEED key
on the remote controller.
Press the STOP key on
the remote controller.
Press the STOP key on
the remote controller.
Initialization is complete.
Press the stop key
the remote controller.
Insert the laser power
meter sensor.
Press the "2" key on
the remote controller.
Set up the playback
laser power.
Increase the laser
power with the F.
SKIP key on the
remote controller.
Adjust the power to be 0.68 mW or
more. If the value exceeds 0.68 mW,
approximate it to 0.68 mW as
accurately as possible.
Press the stop key
the remote controller.
Decrease the laser
power with the B.
SKIP key on the
remote controller.
Press the stop key
the remote controller.
Insert the laser power
meter sensor.
Press the "4" key on
the remote controller.
Set up the recording
laser power.
Increase the laser
power with the F.
SKIP key on the
remote controller.
Adjust the power to be 6.23 mW or
more. If the value exceeds 6.23 mW,
approximate it to 6.23 mW as
accurately as possible.
Press the stop key
the remote controller.
Decrease the laser
power with the B.
SKIP key on the
remote controller.
1-36
Press the MD EJECT
key on the main unit.
Setup of the MD laser
power is complete.
Press the MD EJECT
key on the main unit.
Setup of the MD laser
power is complete.
Page 37
(5) Adjustment of the disk
Set up the MD TEST MODE 1.
Press the stop key
the remote controller.
Insert the
premastered disk.
UX-F70MD/UX-F72MD
Reading of TOC ends.
Press the MD PLAY
key on the remote
controller.
FL indication
ON TUNING
Automatic adjustment starts.
Adjustment OK?
YES
FL indication
OK TUNING
Press the STOP key on
the remote controller.
Press the EJECT key
on the main unit.
Insert a recordable
disk.
Press the MD PLAY key
on the remote controller.
FL indication
ON TUNING
Automatic adjustment starts.
Adjustment OK?
NO
NO
* If an error indication of "ERR:07"
appears at the first adjustment, try
to make a fresh start of the same
adjustment.
Press the POWER key on the
main unit or remote controller.
Cut off the power supply after
cancelling the TEST MODE.
1-37
Page 38
UX-F70MD/UX-F72MD
Adjustment Method 2 (Cassette mechanism section)
Tuner section
Playback/Recording &
eraser head
Head azimuth
adjusting screw
(Forward side)
Head azimuth
adjusting screw
(Reverse side)
Head azimuth
adjusting screw
(Forward side)
Playback/Recording &
eraser head
Removing the Cassette Mechanism Assembly
1. Remove the rear cover.
2. Remove the side panels (right and left).
3. Remove the cassette mechanism assembly.
4. Remove the four screws S fastening the cassette mechanism assembly from the back
of the cassette mechanism.
5. Press the EJECT button on the front side of the cassette mechanism assembly to open
the cassette door, and then remove the cassette mechanism assembly.
Head azimuth
adjusting screw
(Reverse side)
1-38
Page 39
Check and Adjustment of the Head Amplifier Section
UX-F70MD/UX-F72MD
Item
1. Head azimuth
adjustment
2. Tape speed
adjustment
(Reference value)
Speed difference
between the
normal and
reverse directions
Wow and flutter
3. Recording /
playback
frequency
characteristic
adjustment
(Reference value)
Recording bias
frequency
(Reference value)
Erasing current
Check/Adjustment Method
1) Play back the end part of the test tape VT703 (10 kHz).
2) Adjust the head azimuth screws so that the output becomes
maximum in both the normal and reverse directions. After
adjustment, lock the screws with screw bond without fail.
Measuring output terminal: Speaker terminal, 3 load resistance
Difference between L-ch and R-ch: Within 3 dB
Difference between FWD and REV directions: Within 4 dB
1) Play back the end part of the test tape VT712 (3 kHz).
2) Adjust VR37 so that the frequency counter reads 3015 15 Hz
in playback in the normal direction.
Measuring output terminal: Speaker terminal
Make sure that speed difference between the normal and
reverse directions is 60 Hz or less by reading of the frequency
counter. (With the beginning part of the test tape)
Play back the end part of the test tape VT712 (3 kHz).
Make sure that the wow and flutter meter reads 0.25 % (WRMS)
or less.
1) Set a blank cassette tape (Type I: AC225) and enter the set into
the recording pause mode.
2) Cancel the pause mode and start recording. Repeat to input the
1 kHz and 10 kHz reference signals alternately from the CD test
disk to record the signals on the blank tape.
3) While playing back the repeatedly input 1 kHz and 10 kHz
reference signals, adjust VR31 so that output distortion between
the 1 kHz and 10 kHz signals is -1 dB 1 dB.
1) Set a blank cassette tape (Type I: AC225) and enter the set into
the recording pause mode.
2) Make sure that the bias frequency at the bias test point on the
head amplifier P.C. board is 70 9 kHz.
1) Set a blank cassette tape (Type I: AC225) and enter the set into
the recording pause mode.
2) After connecting a 1 resistor to the erasing head in series,
cancel the pause mode and start recording. Connect the
electronic voltmeter to both the terminals and measure the
erasing current.
Adjusting
Point
Head
azimuth
screw
VR37
VR31
Standard
Value
Maximum
output
3015 15Hz
60 Hz or less
0.25 %
(WRMS) or
less
-1dB 1dB
70 9kHz
Erasing
current: 60
mA (Type I
tape)
1-39
Page 40
UX-F70MD/UX-F72MD
Flow of functional operation until TOC read (CD)
Power ON
Power Key
Slider turns REST
SW ON.
Automatic tuning
of TE offset
Check to see if the voltage at the
pin 72 of IC701 or pin 5 of CN602
becomes 0 V for an instant. (The
moment the switch is turned on,
the voltage becomes 0 V.)
Check Point
VREF
Tracking error waveform at TOC reading
pin 25 of
IC601(TE)
Approx
1.8V
Tracking
servo
Disc statas
to rotate
off statas
Automatic measurement
of TE amplitude and
automatic tuning of
TE balance
Approx.3sec
Tracking
servo
on statas
Disc to be
braked to stop
TOC reading
finishes
500mv/div
2ms/div
Fig.1
Laser ON
Detection of disc
Automatic tuning of
Foucus offset
Automatic measurement of
Focus A-curve amplitude
Disc is rotated
Focus servo ON
(Tracking servo ON)
Automatic measurement of
Tracking error amplitude
Automatic tuning of
Tracking error balance
Make sure of the H level at
the pin 40 of IC603.
Confirm that the Focus error
S-curve siganl at the pin28 of
IC603 is approx.2Vp-p
Confirm that the siganl from
pin24 IC603 (R645) is 0V as
a accelerated pulse during
approx.400ms.
Make sure that the TE
signal (1.8 Vp-p approx.)
indicating the tracking
servo off status is output
from the pin 25 (one side
of R609) of IC601.
1-40
Automatic tuning of
Focus error balance
Automatic tuning of
Focus error gain
Automatic tuning of
Tracking error gain
TOC reading
Play a disc
Confirm the eys-pattern
at the lead of TP602
Page 41
Flow of functional operation until TOC read (MD)
Power ON
MD play key
Check Point
Slider turns REST
Switch ON.
Confirm that the voltage
at the pin 9 of CN408 are 0V
UX-F70MD/UX-F72MD
Mechanism Operation ON
Laser ON
Detection of Disc
Automatic tuning of
Focus S-curve amplitude
Disc is rotated
Focus servo ON
(Tracking servo ON)
Automatic tuning of
Focus error gain
Confirm that the voltage
at the pin 50 of IC500 are 4V
Confirm that the Focus error
S-cuve signal at the pin34 of
IC310 is approx.2Vpp
It is confirmed that pin7 of CN408
become 0V from VREF as an acceleration
pulse between about 400ms.
Automatic tuning of
Tracking error gain
TOC reading
Play a disc
Confirm that the eye-pattern
at the pin38 of IC310
1-41
Page 42
UX-F70MD/UX-F72MD
Maintenance of laser pickup
(1) Cleaning the pick up lens
Befor you replace the pick up, please try to
clean the lens with a alcohol soaked cotton
swab.
(2) Life of the laser diode (Fig.1)
When the life of the laser diode has expired,
the following symptoms wil appear.
(1) The level of RF output (EFM output:ampli
tude of eye pattern) will below.
Is RF output
1.25 0.22Vp-p?
YES
O.K
NO
Replace it.
Replacement of laser pickup
Turn off the power switch and,disconnect the
power cord from the ac outlet.
Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)
Plug the power cord in,and turn the power on.
At this time,check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.
Play a disc.
(Fig.1)
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed
circuit board which is attached to the pickup
is used to adjust the laser power.Since this
adjustment should be performed to match the
characteristics of the whole optical block,
do not touch the semi-fixed resistor.
If the laser power is lower than the specified
value,the laser diode is almost worn out, and
the laser pickup should be replaced.
If the semi-fixed resistor is adjusted while
the pickup is functioning normally,the laser
pickup may be damaged due to excessive current.
Check the eye-pattern at TP602.
Finish.
1-42
Page 43
UX-F70MD/UX-F72MD
Maintenance of MD pickup
1. Cleaning of pickup lens
(1) Prior to changing the pickup, clean the pickup lens.
(2) For cleaning the lens, use the following cotton swab after
mearsing it in alcohol.
2. Confirmation of the service life of laser
diode when the service life of the laser
diode has been exhausted, the following
symptoms will appear.
(1) Recording will become impossible.
(2) The RF output (EFM output and eye pattern amplitude)
will become lower.
(3) The drive current required for light emitting of laser diode
will be increased.
Confirm the service life according to the following flow chart:
Procedures of changing
the MD pickup
Change the MD pickup by referring
to "Removing the MD pickup" in the
Disassembly Method.
Set the pickup to [TEST] mode according
to the procedures described in the
Adjustment Method.
Adjust the laser power.
Completion the disc.
Is the recording power
(6.23mV) output with the
laser power under
test mode?
YES
Is the drive current
of laser diode
120mA or less?
YES
NO
Change the pickup
NO
Change the pickup
OK.
3. Method of measuring the drive current of
laser diode
For disk check after the laser power adjustment, be
sure to use a disk that is not only clean without
scratch but full of circular recording, because the
adjustment is automatically carried out and resultant
setup values are written in the memory.
Completion of changing the MD pickup.
[Caution]
Since this system is designed to perform
magnetic recording, the laser power ten
times or over of the conventional MD player
will be output. Therefore, be sure to perform
not only adjustment and operation of this
system so carefully as not to directly look at
the laser beam or touch on the body.
Measure the voltage at both sides of R337 on
the MD servo control P.C. board. If the voltage
is 120 mV or more, the laser diode is judged
as it has come to the end of its service life.
4. Semi-solid state resistors on
the APC P.C. board
The semi-solid state resistor on the APC P.C.board
attached to the pickup is used for adjusting the laser
power. Since these resistor should be adjusted in
pair according to the characteristics of the optical
block, be sure not to touch on the resistors.
Since the service life of the laser diode will be
exhausted when the laser power is low, it is
necessary to change the pickup. Meanwhile, do not
pickup. Otherwise, the pickup will be damaged due
to over current.
Not connected
Not connected
Not connected
Stereo detection
Stereo indicator detection
Not connected
Tuner switch output
CD switch output
Connected with VDD
Not connected
PB mute output
Not connected
Power key input
LED control output
Buzzer output
MD PB output
MD reset output
System mute output
Not connected
Not connected
Power-on control output
GND
Door position detection - UP
Door open/shut motor control output
Door open/shut motor control output
Door position detection - MIDDLE
Door position detection - DOWN
Door open/shut motor speed control output
Volume control clock
Volume control chip enable
Volume control data
Active hyper bus control
Backup detection
Battery control
Not connected
Power-off clock oscillator control
Power supply
Master clock
Master clock
GND
Clock for timer
Clock for timer
Power-on reset
Remote control sensor
Not connected
Not connected
Reel pulse detection
DO
DI
SCL
CS
TEST
STS_RDY
MMON10
MMON11
MMON12
MMON13
NC
NC
NC
POWER
PWAD
PWDA
EMPHA
ID0
ID1
ID2
ID3
Vss
NC
MODON
MODCHG
NC
NC
NC
DRIVER_ON
XTSL
Vdd
TX
NC
RECP
NC
NC
XRST
SENS
XLAT
MNT3
MNT2
MNT1
MNT0
Vpp
CAM4
CAM3
CAM1
CAM2
NC
NC
3. Pin function (2/2)
Description
Symbol
Pin No.
Serial data output for external EEPROM
Serial data input for external EEPROM
Clock output for external EEPROM
Chip select output for external EEPROM
Test pin
Not used
Parallel operation monitor input
Parallel operation monitor input
Parallel operation monitor input
Parallel operation monitor input
Not connected
Not connected
Not connected
Power on/off control (H: Power on)
Audio A-D converter on/off control (L: Power down)
Audio D-A converter on/off control (L: Power down)
PB signal emphasis on/off signal (L: On)
Connected to GND
Connected to GND
Connected to GND
Connected to GND
GND
Not connected
Laser pickup high frequency duplex on/off (L: On [in PB])
Laser pickup high frequency duplex voltage control (L: PB, H: REC)
Not connected
Not connected
Not connected
Driver shoot
Connected with DSP (IC350) XTSL terminal (for switching input frequency)
Power supply
REC data output enable signal
Not connected
Connected with DSP (IC350) RECP terminal (for switching laser power)
Not connected
Not connected
Connected with DSP (IC350) XRST terminal (reset input)
Connected with DSP (IC350) SENS terminal (internal status output)
Connected with DSP (IC350) XLAT terminal (microcomputer serial interface latch input)
Connected with DSP (IC350) MNT3 terminal (monitor output)
Connected with DSP (IC350) MNT2 terminal (monitor output)
Connected with DSP (IC350) MNT1 terminal (monitor output)
Connected with DSP (IC350) MNT0 terminal (monitor input/output)
Cam switch input 4
Cam switch input 3
Cam switch input 1
Cam switch input 2
Not connected
Not connected
UX-F70MD/UX-F72MD
1-49
Page 50
UX-F70MD/UX-F72MD
UPD780024AGKB21 (IC251) : Unit micon
1. Pin layout
64 ~ 49
1
48
~
16
17 ~ 32
2. Pin function (1/2)
Pin
No.
SymbolI/ODescription
P50/A8
1
P59/A9
2
MCS
3
MRDY
4
CDINDEX
5
CDEMP
6
CDTNO
7
CDCOPY
8
VSS0
9
VDD0
10
P30
11
P31
12
P32
13
MUTE
14
SUBQ
15
P35/SO31
16
SQCK
17
KCMND
18
M STAT
19
MCLK
20
RXDO
21
TXDO
22
P25/SCK0
23
VDD1
24
AVSS
25
KEY1
26
KEY2
27
PCHK
28
P14/AN14
29
P13/AN13
30
/OPEN
31
/REST
32
~
33
Connected to GND
Not used
ÂPull-up +B
Not used
ÂNot used
ÂCD emphasis detection
I
CD track No. detection
I
CD copy detection
I
GND
ÂPower supply
ÂNot used
ÂNot used
ÂNot used
ÂMute output
O
Sub-code Q data input from IC651
I
Not used
ÂSub-code Q register clock output to IC651
O
Kick command data
O
CD control status output to IC801
O
CD control command clock input from IC801
I
Digital data input
I
Digital data output
O
Connected to GND
Power supply
ÂGND
ÂKey input 1
I
Key input 2
I
Parity check
I
Connected to GND
Connected to GND
Open switch input
P10/AN10
AVREF
AVDD
/RESET
XT2
XT1
IC
X2
X1
VSS1
FLAG
BLKCK
/RFDET
EQx2
EQx4
VCOx4
OPEN
/CLOSE
IREFx4
P75/BUZ
/RESET
S TAT
/DMUTE
/P.ON
MLD
M DATA
MCLK
CLKSW
JIG
JIG
JIG
JIG
Connected to GND
Analog circuit reference voltage. Connected with analog circuit power supply
Analog circuit power supply
CD control reset input from IC801
Not used
Connected with power supply
Flash memory control
Connected with external crystal oscillator
Connected with external crystal oscillator
GND
Flag signal input from IC651
Sub-code block clock signal input from IC651
RF signal amplitude detection input
2 equalizer switch output
4 equalizer switch output
Not used
Open door detection
Closed door detection
4 DSP current switch output
Not used
Reset signal output to IC651 (L: Reset)
Status signal input from IC651
Muting output to IC651
Power on/off switch signal output to IC291
Microcomputer command load signal output to IC651
Microcomputer command data output to IC651
Microcomputer command clock signal output to IC651
Not used
Not used
Not used
Not used
C-connector terminal comprising volume + equalizer output and super-bass filter
Super-bass band filter C & R connector terminal
Bass band filter C & R connector terminal
Bass band filter C & R connector terminal
Treble band filter C connector terminal
Volume input
Input selector output
CD signal input
AUX signal input
MD signal input
Tape PB signal input
FM tuner signal input
Analog GND
FM tuner signal input
Tape PB signal input
MD signal input
AUX signal input
CD signal input
Input selector output
Volume input
Treble band filter C connector terminal
Bass band filter C & R connector terminal
Bass band filter C & R connector terminal
Super-bass band filter C & R connector terminal
C connector terminal consisting of volume + equalizer output and super-bass filter
Op-amp non-inverse input
Op-amp inverse input
Op-amp output
Power supply
Serial data and clock input
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
6
5
UX-F70MD/UX-F72MD
4
3
2
1
BC
DE
F
G
HA
I
2-3
Page 77
MD control circuit
UX-F70MD/UX-F72MDUX-F70MD/UX-F72MD
C323
0.0068
C325
6
C327
R309
470k
C314
0.022
R310
330
KRA102S-X
R451
47k
R452
56k
D451
D452
R311
Q331
SM+
FM+
FM-
LM+
LM-TRDR
NAD0006-103X
C452
0.1
1SS355-X
6.8k
C315
0.001
R340
2.2k
XC62ER3602M-X
TP441
R456
0.1
C451
D454
NI
D453
NI
C312
47/4
C311
1
0.001
C331
NI
5
FCS+
FCS-
TRK+
TRK-
0
CN321
QGF0501F2-21X
R302
4
R420
FRDR
22k
R422
FFDR
22k
3
R424
22k
TFDR
R426
0.01
TP422
VREF
C455
CAM4
CAM3
CAM2
CAM1
SM+
SM-
FM+
FM-
MPROT
MREF
SSTOP
100p/100
22k
QAR0144-001
MT603
C406
NI
QGF1006F2-08W
CN407
CN612
QGA1501F1-02
QGF1006F2-09W
H601
QAH0039-001
CN611
QGF1016F3-08
CN601
MT601
MT602
2
S611
QSW0848-001
FF-110PH-08280
QAR0144-001
NSW0057-002X
S601
S602
S602
NSW0007-001X
1
C405
NI
C407
100p
C408
NI
C415
C416
QGF1016F2-04WQGF1006F2-09W
CN451CN408
NI
C330
0.1
C302
0.1
R305
2.2k
NI
C300
C303
R421
C421
R423
C423
560p
560p
C425
R425
10k
C427
LM-
LM+
R454
1
C456
NI
R453
1
470k
R306
0.1
KRA116S-X
C301
NI
0
10k
560p
10k
R427
10k
560p
0.1
Q333
R301
Q332
KRA116S-X
MODON
MODCHG
2SA1363/EF/-X
C400
NI
C410
C411
1
FCS+SM-
FCS-
TRK+
TRK-
C412
0.1
100/16
C450
C453
R455
NI
C310
0.0022
Q330R338R337
2SA1362/G/-X
4.71
C334
0.1
R401R402
C402
330p
IC410
M63008FP-X
IC450
TP309
0.15
C333
15k5.6k
C307
100k
R336
100/6.3
C401
RB160L-60-X
RB160L-60-X
8.2
R330
27
R331
Q400
22/16
BD7910FV-X
0.01
C361
0.1
1k
R387
10
XBCKI
COMMAND
1k
R518
1k
R514
MNT3
XLAT
NI
NI
LOAD
MNT2
330
R389
47/4
C350
L351
SET3
DIN1
SET1
1k1k1k
R558
R557
R556
R509
R517
EJECTADDT
R506
MNT0
MNT1
10k
1k
1k1kNI
R563
R564
CAM3
CAM4
R328
0.22
100
0.022
C324
C326
IC310
CXA2523AR
0.0047
C320
R320
0.1
DTRF
CKRF
D310
NI
Q451
XLRF
R314
C316
13k
R312
10k
C341C340
0.0220.022
IC400
0.1
Q401
R403
470
33k
R404C409
2SA1363/EF/-X
C429
0.0039
R428
R429
3.9k
24k
R430
24k
C431
3.9k
R431
0.0039
0.01
C437
R436
22k
R437
3k
R438
C439
0.01
3k
R439
8.2k
R433
R432C433
0.0056
R435
R434
8.2k
C435
0.0056
100/4
IC590
BR93LC66F-X
1
C317
NI
IC340
R315
R313
100k
22k
12k
12k
R342R341
2.2k2.2k
47/4
C403
KRC102S-X
24k
R300
R440
10k
10k
R441
Q410
KRC102S-X
Q411
0
SPRD
SPFD
EJECT
SFDR
SRDR
LOAD
C342
0.1
SVIB
4REC
0.1
C591
R591
TC7S08F-W
100k
10k
R593
R592
NI
PEAK
10k
10k
100k
R372
R371
R370
K346
NQR0360-002X
NAX0355-001X
10k10k
R355R354
0.1
NI
C510
SVIB
R361
R362
R363
R364
R365
R366
R356
R367
R368
R369
D351
NI
D350
NI
330
R397
R335
47k
R339
47k
R334
47k
R333
47k
R332
47k
DIN0
SCLK
1k
R520
1k1k1k
R510
R511
R512
XTSLTXRECP
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
3301k1k
330
R396
R398
R399
R390
LRCKI
DATAI
DIN1
DOUT
SRDT
SWDT
STATUS
COMCLK
1k
1k
1k
R516
R515
R519
IC500
UPD784217AGC139
1k
R513
SENS
XRST
BOTM
R327
330
ABCD
R326
330
R324
R323
C321
1
56k
C328
R316
100k
C318
0.0068
ESCL
FE
1k
AUX
TP331
330
ADFG
C322
1
R322
SE
330
TP332
R321
TE
330
C329
NI
R325
4.7k
R343
1k
F0CNT
R317
APCREF
10k
C319
0.033
EDO
EDI
ESCL
ECS
PWAD
PWDA
EMPHA
NI
R549
MODON
MODCHG
EDO
2.2k
R522
EDI
ECS
STSRDY
0
R545
C515
0.1
XRST
MNT0
MNT1
MNT2
MNT3
SWDT
SCLK
XLAT
SRDT
SENS
XRST
SQSY
DQSY
RECP
XINT
TX
XTSL
X350
C358
0.1
K353
NQR0389-003X
VREF
C359
K505
NQR0389-003X
4REC
R521
1k
R523
1k
R524
1k
R525
1k
R546
0
R547
0
R548
0
1k1k1k
R394
R393
LRCK
DADT
MODESE
1k
R554
R555
R553
R552
R551
R565
R566
CAM1
CAM2
SPFD
SPRD
SFDR
SRDR
FRDR
FFDR
TFDR
TRDRA11
C355
0.1
IC350
CXD2662R
560
R392
R391
FS256
XBCK
100k
NI
100k
100k
000
R560
R562
R561
R537
10k
R536
10k
R534R533
10k
R535
NI
A05
A06
A07
A00
R559
1k1k1k
R567
MPROT
A10
0
XINT
DQSY
SQSY
R568
SSTOP
A08
A04
33p
C378
22k
R570
R569
MREF
A03
A02
A01
1
C351
R532
NI
R531
NI
NI
ADFG
XLRF
CKRF
DTRF
F0CNT
APCREF
TE
47/4
C352
SE
1
C353
C391
AUX
FE
ABCD
BOTM
PEAK
1
C354
R375 R376
10k 100k
0.01
C375
XRAS
XOE
XCAS
A09D1XWED3D0
D2
C492
0.001
C491
0.001
C480
47/6.3
CDTNO
CDEMP
EMPHA
PWAD
PWDA
FS256
LRCK
XBCK
ADDT
DADT
C481
1
C484
10/16
C485
0.1
C486
0.1
C488
10/16
1k
R395
R490
NI
47k
47k
47k
R538
R540
R541
R530
1k
R529
CDCOPY
1k
R528
1k
C511
R503
0.1
C512
2.2k
R504
0.1
33k
C501
18p
NI
R501
C502
X500
R502
18p
1.5k
NAX0426-001X
R378
3.3k 1k
C376
R381
1M
0.47
AK4519VF-X
C380
R382
150
0.015
1k
R380
R379
470p
680k
R492
470
R491
470
IC480
D0
D1
XWE
C379
0.47
XRAS
A11
C377
R377
A10
A00
A01
10
L352
A02
A03
R483
0
R481
10
4.7/35
C489
C487
0.1
22/6.3
C482
C483
0.1
NI
IC390
M11L1644SA-50T
D3
D2
XCAS
XOE
A09
A08
A07
A06
A05
A04
C390
10/6.3
CDTNO
CDCOPY
LRCKI
CDEMP
DATAI
XBCKI
K521
K522
NQR0354-001X
NQR0389-003X
K495
L526
NQL274M-1R5X
K492
K491
K523
NQR0354-001X
DOUT
DIN0
KRA116S-X
KRA102S-X
KRC102S-X
0.01
C493
C490
1
IC485
TK11140SC-W
C497
0.1
C496
1
R497
1
NQR0022-005X
NQR0022-005X
NQR0389-003X
K524
C495
C494
NI
NI
K496
R496
470
NQR0022-005X
NQR0022-005X
R495
470
L525
NQL274M-1R5X
C590
0
0
0
0
0
COMMAND
STATUS
MODESE
100p
RESET
COMCLK
STSRDY
SET3
DIN1
SET1
CN522
K530
K531
K528
K532
K527
K529
0
CN521
QGF1006F2-08W
QGF1006F2-21W
MD SIGNAL
BC
DE
2-4
F
G
HA
I
Page 78
CD control circuit
6
5
4
3
0.1
C003 C002
UX-F70MD/UX-F72MD
CDTNO
MCS
MRDY
CDEMP
CDCOPY
IC251
UPD780024AGKB21
MLD
MCLK
MDATA
CDINDEX
1k
1k1k100
1k
R282
R281
R283
R256
K655
R284
BLKCK
FLAG
NQR0007-002X
SRDATA
K656
MCLK
R251
1k
MDATA
R252
1k
MLD
R253
1k
/DMUTE
1k
R254
STAT
/RESET
IREFx4
R264
10k
R265
20k
D251
DA204U-X
D292
10k
C255
0.1/16
R275
R291
10k
1SS355-X
LRCK
BCLK
K657
K658
NQR0251-004X
NQR0251-004X
NQR0251-004X
D603
R675
10
100/6.3
0.1/16
C657
C655
MA112-X
47/10
C254
IC291
1
1
R292
R293
C291
XC62HR3502P-X
1/16
C292
1/16
KCMND
R258
MSTAT
MRDY
KCLK
R260
MCS
R255
R285
C658
0.1/16
NI
CN671
QGF1016F3-19
CN651
1k
1k
1k
1k
R601
220k
R602
82k
39k
C604
0.022
C603
C602C601
0.001
AN22000A-W
IC601
0.022
1/16
0.1/16
100/6.3
C611
C623
C624
C608
NI
R611
R613
5.6k
F
E
B+D
A+C
HDU-110
0.1
1
C001
CN001
47k
F-
F+
T+
T-
CN601
QGF1037F1-15W
47k
VR001
1k
C633
A+C
0.022
F
R635
R608
R607
10
E
B+D
R636
150
C632
1/16
R634
3.9
0.001
D601
NI
R631
R632
2.2
C631
3.9
10/16
2SA1037AK/RS/-X
Q631
C605
270p
R603
82p
220k
R604
C606
0.1/16
100/6.3
C622
C621
0.039
0.0027
0.1/50
680p
C617
C614
C615
C612
C610
0.056/16
R617
3.3k
5.6k
330p
C616
C681
6p
C682
15p
C683
22p
TP1
Q651
DTC114EUA-X
Q652
DTC114EUA-X
TBAL
FBAL
FE
TE
SUBQ
C270
NI
C272
C271
100p
GCTL
/RFDET
OFT
BDO
ARF
RFENV
TP2
SQCK
/OPEN
/REST
100p
R257
1k
KCMND
R259
MSTAT
1k
KCLK
R261
0
1k
R263
1k
R262
0.1/16
C256
NI
6.8k
10k
10k
10k
R274
R276
R272
R271
R273
C261
NI
C273
0.1/16
X251
QAX0664-001Z
STAT
SUBQ
SQCK
BLKCK
/RESET
/DMUTE
R651
R652
R653
R654
C653
0.33/10
1k
1k
1k
1k
TVD
ECM
ECS
TRD
R812
C802
1.5k
C815
1/10
R803
1000p
T+
F+
F-
C801
390p
0.022
390p
C814
C811
1/16
LA6541-X
IC801
R804
47k
R811
2
1
SW102
QSW0931-001
SW101
QSW0927-001
QAR0176-001
QAR0175-001
/OPEN
/REST
M851
M852
FM-
C818
1/16
FM+
SM-
C817
1/16
SM+
R801
10k
390p
C812
SM-T-
2.7k
C821
390p
C813
SM+
FM-
FM+
4.7k
TRD
R813
1.8k
C816
1.5/6.3
R802
R808
R805
FOD
1.5k
C822
220/10
ECM
18k
ECS
R809
1.5k
TVD
12K
FOD
FBAL
TBAL
FE
R682
TE
RFENV
OFT
/RFDET
BDO
GCTL
1k
C676
0.1/16
R683
1M
DTA114EKA-x
R672
C661
470p
Q673
NI
R663
R673
68k
0.022
C664
ARF
R667
4.7
D602
NI
0.1/161k100/6.3
C680
C679
IC651
MN662790RSC
R679
68k
R685
R671
680k
C667
330
R662
68k
R664
68k
0.15/16
0.022
1.5M
C663
C665
R668
0.47/16
C668
5.6k
0.047
R669
100
R665
C651
1p
NAX0476-001X
1k
X651
C652
1p
0.1/16
C678
C673
100/6.3
R666
C677
100
0.1/16
K652
R677
FLAG
47k
R661
20k
R659
0.1/16
C656
IREFx4
NI
R656 R655
R862
680
R861R863
680
NINI
C862
560
C864R864
2700p
1000p
C863
C861
2700p
1000p
560
IC652
NI
R657
NI
C654
NI
R658
NI
CDINDEX
CDTNO
CDCOPY
LRCK
CDEMP
SRDATA
BCLK
K651
NI
QGF1016F2-08W
CN606
NI
CN607
QGF1016F2-04W
CN605
R678
1k
CD SIGNAL
BC
DE
F
G
HA
I
2-5
Page 79
Cassette control circuit
6
5
4
3
QAH0047-001
QGF1205F1-06
CN31
UX-F70MD/UX-F72MDUX-F70MD/UX-F72MD
IC1
22
R201
C203
220/6.3
C204
220P
C202
C103
220P
R101
C102
QVP0008-203Z
VR31
0.033
C104
0.033
DTC114TKA
220/6.3
22
Q203
R203
2.4K
DTC114TKA
R103
2.4K
820P
C201
IC31
BA3126N
1K1K
R216R116
R301
220
4.7/25
C301
100/10
R327
470K
C209
0.0068
R207
12K
R107
12K
C210
C110
820P
0.0068
4.7/25
C109
R121
15K
R221
15K
C101
C121
330P
C221
330P
Q103
R102
1.8K
R202
1.8K
Q101
DTC114TKA
0.0047
C319
Q201
1K
R122
DTC114TKA
R222
R305
2.2K
C205
0.0022
R206
3.3K
1K
C206
10/16
C106
10/16
R106R205
3.3K100K
100K
0.0022
R105
C105
QQR1118-001
0.022
C316
22/16
22/16
C304
C302
L301
560P
C207
C305
C306
220/6.3
0.039
C303
39K
R303
100/10
C313
R204
1.2K
47/16
R304
100
IC32
AN7317
560P
C107
L303
QQL244K-100Z
1.5
C314
R208
5.6K
C108
R108
5.6K
4.7/25
Q302
2SC2001/K/
2.2
C310
R313
4.7
R310
Q305
2SC2001/LK/
C208
4.7/25
R109
R353
QRZ9005-100X
R315
100
0.022
R210
2.7K
1K
R209
C113
1K
R110
C211
0.0015
R212
2.2K
0.0015
R211
36K
R104
1.2K
R111
36K
C111
R112
2.2K
R335
1.5K
Q321
DTC144EKA
C307
0.01
Q375
2SB562/C/
C376
0.01
D375
2SC2412K/RS/
Q376
150
R375
DTC114TKA
MA3051/M/
DTC124EKA
R376
4.7K
2.2K
R345
Q331
C334
4.7/25
C213
0.039
0.039
2.7K
R314
15K
C308
0.0015
VR37
QVP0008-103Z
Q371
Q372
SW4
VWS304-06A13K
R371
2SA952/LK/
1K
R372
IC33
R339
R336
SW5
FW31
12K
BU4094BCF
2.2K
4.7K
QSW0859-001
SW6
SW1
SW2
C371
MSI-5U2LWA
C374
R338
3.9K
R337
3.3K
4.7/25
SG-105F3-BB,C
100/10
390
R340
47/16
C331
D1
1SR139-400-T2
12K
R341
20K
R342
VKZ3174-00A
CN1
QGB2011L1-10
CN32
QGB2011M1-10
18K
R343
2
CN34
QGF1205F1-10
TO CN744
OF FMH-025-1
SHEET 5/7
1
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
BC
DE
F
G
2-6
CN33
QGF1205F1-09
TO CN743
OF FMH-025-1
SHEET 5/7
TAPE P. B. SIGNAL
SHEET 4/7
HA
I
Page 80
Tuner circuit
6
UX-F70MD/UX-F72MD
TU1
5
R1
QNB0014-001
1SS133-T2
D1
J1
1SS133-T2
56
D2
C1
1SS133-T2
D3
D4
1SS133-T2
R5
56
C3
0.022
10/16
CF1
VCF2L3B-105Z
R4
330
R3
220K
Q1
C2
C4
0.01
0.01
2SC2814/4-5/-X
R2
R6
47
330
100/10
C25
4
L1
QQR0796-001
3
C11
0.1
R13
R15
3.3k
C12
C13
0.047
10K
12P
R14
100K
R16
4.7K
R17
C14
68( 1/4W) F.RES.
100/10
C7
0.001
C17
0.0039
C18
0.47/50
R23
1.8k
R10
2.2K
C15
12P
LC72136N
X1
IC2
QAX0402-001
C16
12P
1K
1K
R18
R19
C22
150P
150P
C23
150P
C24
C20
1000P
C19
0.047
R26
2.2K
R25
R22
1K
R20
330
4.7k
R21
5.6K
Q5
DTA114YKA-X
R30
1.2K
R29
10K
10K
R24
R27
R28
10K
10K
C54
C53
C52
0.27
0.047
22/16
R41
3.3K
T1
QQR0793-001
C6
0.001
D11
1SS133-T2
C57
0.001
CF2
VCF2L3B-105Z
C51
1/50
IC1
LA1838
C48
0.0022
C49
470P
C58
C50
22/16
0.047
C32
0.047
C31
22/16
C21
0.022
0
R60
R40
C60
24K
C47
C46
1/50
0.027
C33
0.047
47
R34C34
0.022
0.047
C35
CF3
QAX0610-001Z
R33
330
*R38
C45
10/16
C44
10/16
*R39
*C43
*C42
C41
10/16
C40
10/16
R37
10K
R36
3.3K
C38
1/50
0.22/50
C37
1/50
C39
5.6k
C36
1/50
R35
C30
100/10
R32
1K
C26
0.001
C27
0.001
R31
1K
2
DATA
TO CN701 OF FMH-025-1
SHEET 5/7
GND
QGF1205F1-09
CN1
5.6V
LOUT
ROUT
STEREOCE9V
CK
AM SIGNAL
FM/TUNER SIGNAL
1
Parts are safety assurance parts.
When replacing those parts make
BC
DE
sure to use the specified one.
F
G
SHEET 1/7
HA
I
2-7
Page 81
Printed circuit boards
Main board Block No. 01
UX-F70MD/UX-F72MDUX-F70MD/UX-F72MD
TUCK
K2302
R2008
R2007
BU+5V
C2316
B2760
R2015
R2061
TUST
C2218
9
R2072
1
TUDATA
C2305
R2012
R2073
K2301
R2083
R2082
R2081
R2080
B2917
CN701
B2754
R2011
R2005
100
R2070
1
C2216
R2010
R2003
TX
21
MODESE,
SET1
1
C2215
L2201
L2101
E
R2009
R2077
R2075
CDRST
MCS
NC
Q2301
R2303
L2401
NC
R2079
NC
NC
NC
R2714
CDRXD
C2115
C2217
C2117
A
NC
C2118
K2303
B2933
R2084
R2713
R2716
1
CDTXD
STATUS
L2302
B
R2002
R2001
B2903
CN704
COMMAND
RESET
C2306
D2301
C2317
W702
R2090
R2006
R2718
R2717
R2715
MGND
L2304
C2318
Q2706
M5.5V
DIN1
L2306
C2319
C2014
C2013
C2012
Q2708
DOUT
C2308
DGND
21
K2305
C2310
Q2707
MDLOUT
CN721
K2304
R2086
B2922
19
8V
R2111
R2110
1
R2235
C2131
R2020
8V
C2128
R2066
MGND
C2228
D2201
R2019
R2064
MGND
1
R2018
R2062
OUTR
9
TUR
C2219
R2057
80
R2060
R2088
CDAGND
CDAGND
AGND
R2085
TUL
CN701
C2010
OUTL
5V
R2215
C2116
R2115
R2122
R2222
R2016
3031
CDDGND
CDDGND
9V
R2017
C2009
MPX
81
BU+5V
1
5
FKEY2
DGND
BUZZER
FKEY1
PIN
R2026
B
Q2701
E
X2701
R2051
R2210
C2225
R2231
C2703
C2704
R2053
R2136
R2137
R2025
C2005
C2230
R2135
R2024
R2052
C2750
R2232
Q2103
R2023
R2701
C2114
C2231
C2709
R2054
5
C2130
R2022
CN705
C2210
R2237
CN705
D2202
R2021
IC701
R2134
50
51
R2087
C2011
C2006
C2007
R2234
Q2203
B2932
Q2352
D2703
C2208
R2503
C2208
C2119
D2705
Q2351
D2351
R2351
R2352
B2906
C2209
C2229
C2226
19
IC702
36
1
B2905
B2908
C2125
R2132
C2110
12
C2701
Q2705
Q2704
R2703
R2709
R2712
R2711
C2713
R2040
R2039
C2706
R2029
X2702
C2002
R2044
L2002
B2918
6
CN744
1
MGND
R2411
D2046
SW10V
NC
Q2201
PBR
AGND
PBL
8V
RECR
Q2101
NC
RECL
10
R2106
C2129
R2203
R2204
C2212
R2103
R2104
C2112
C2227
C2453
C2853
R2852
10
B2920
R2856
R2855
5
J2001
D2451D2451
D2452
4
C2855
R2853
R2092
R2223
R2123
Q2104
Q2853
R2209
R2407
R2208
Q2204
IC703
R2105
C2452
B
Q2453
D2455
D2851
R2206
CN744
R2093
R2854
R2108
10
E
C2403
W702
A
B2255
1
1
1
R2205
R2207
R2107
B
Q2452
E
E
C2127
D2852
C2852
R2096
B
D2402
12
AGND
LOPOUT
R2415
R2416
ROPOUT
R2109
MGNDA
CD+B
B2902
1
R2408
SAFETY3
CDDGND
CN712
CN743
Q2403
SW10V
B2403
C2109
SAFETY2
DGND
R2418
R2225
1
CDAGND
MICON+B
C2404
CN712
9
C2107
D2708
R2417
C2202
R2130
C2108
12
C2326
C2712
3
CN711
1
MGNDB
5V
MD+B
MDDGND
W201
FCD
2
MDPOUT
SMUTE
POUT
A9V
SAFETY4
AHB
NC
12
12
CN743
PHOTO
1
PLAY
KEY1
SAFETY1
DGND
SCK
SW5V
R2229
R2230
SDATA
9
STTA
C2205
C2206
C2201
C2103
R2133
CN711
R2708
R2126
R2707
L2001
C2004
R2037
C2101
R2036
R2041
R2042
C2207
B2907
C2714
R2043
R2045
C2102
D2702
K2001
D2701
R2032
R2033
R2034
C2502
R2228
C2203
R2233
C2204
R2227
R2128
R2129
B2919
R2125
C2104
C2106
C2105
R2127
1
B2916
Q2703
R2706
R2705
R2095
R2138
CN704
119
C2352
C2351
R2354
C2214
R2353
R2211
D2353
D2352
C2211
R2505
18
R2131
C2126
B2910
R2702
R2028
C2001
R2704
C2707
R2710
R2027
C2702
BE
Q2702
D2001
C2705
C2708
C2711
R2031
R2030
C2710
R2049
R2050
R2046
R2047
R2048
D5.5V
R2740
R2741
R2742
R2743
MDROUT
C2309
R2744
R2745
K2002
C2015
A5V
CN709
C2307
L2305
1
2
C2313
20
1
RECL
AGND
W202
1 RECR
CN721
K2003
C2753
C2752
C2751
CN709
NC
1
BLUE
SW10V
GREEN,
RED
DGND
REM
SCL
CS
RESET
SDA
RS
LEDCTL
UP
MIDDLE
DOWN
LCD5V
MOTOR+
MOTOR-
MGNB20
1
BC
DE
2-8
F
G
HA
I
Page 82
Power amplifier & control & AC jac k board Block No. 02
UX-F70MD/UX-F72MD
S2610
R2608
R2604
D1605
CDAGND
Z1007
1
CN802
C1002
R1004
S2604
C1042
R1049
F1003
R2606
R2605
D1007
Q1004
1
Z1006
E
Q1023
B
DGND
C1018
D1008
BZ
S2609
CN802
C1003
FKEY1
D1003
R1101
R1210
FKEY2
R1209
5
PIN
S2606
E
C1205
R1615
D1002
C1005
D1005
C1209
R1211
R1213
R1201
E
R1110
Q1202
C1005
C1206
Q1607
C1106
C1057
R1617
C1105
C1043
B
R1109
E
C1047
R1077
Z1005
F1005
B
BE
D1603
R1616
D1005
R1113
B
Q1102
D1403
C1501
B
R1802
R1801
D1604
E
Q1705
Q1703
C1302
C1109
Q1704
J,CONLY
R1111
C1707
C1046
R1807
R1099
E
D1903
R1601
R1301
D1404
D1902
C1601
T1002
R1112
R1803
L1006
C1108
R1705
R1114
C1056
Q1901
D1405
Q1301
B
E
D1301
R1704
R1214
C1208
D1801
R1602
R1212
R1806
C1803
C1058
R1804
C1602
B
R1903
B1002
B1007
C1903
C1301
B
B
15
R1805
R1502
1
D1601
C1801
C1802
R1901
R1215
R1902
Q1803
C1107
R1115
B1001
C1902
CN804
C1207
Q1802
RY801
B1003
B1006
C1110
L1101
C1210
L1201
R1702
R1703
1
14
1
C1901
IC801
E
IC802
C1502
E
D1501
R1501
Q1801
B
E
CN909
SW10V
GREEN
MTR-
MGND
Z1002
BLUE
RED
DGND
REM
SCL
RESET
LCD5V
-
CS
CN809
SDA
MTR+
OTHERSVER
C1111
C1211
E
Q1701
B
RS
LEDCL
UP
MID
DOWN
20
Z1004
F1001
USERIESONLY
C1706
S1001
F1002
J1001
B
Q1702
E
4
CN906
1
1
CN909
14
T001B
Z1001
Z1003
J1003
B1004
B1005
20
14
CN908
RESET
RS
LCDCK
LCD5V
LCDCE
REM
SDA
M.GND
GREEN
BLUE
RED
SW10V
LEDCTL
1
DGND
CN907
C1009
2
1
S2605
K1010
L1004
L1003
S2615
L1005
R2611
J1002
S2612
S2611
S2614
R2609
R2610
W1001
K1009
6
SW202
SW201
1
4
BZ201
R2607
5
S2607
S2601
S2608
R2601
R2603
R2602
S2603
S2602
R2613
R1091
R1090
S2613
R2612
S2616
CN808
4
CN801
K1003
12
SAFETY4
AHB
A9V
SMUTE
POUT
-
C1055
R1087
D1027
C1053
C1052
C1054
R1086
D1026
3
D1606
K1006
K1005
D1904
D1905
C1402
C1401
2
T1003
D1702
BE
R1924
CN807
Q1909
R1925
B
Q1910
B
E
Q1908
E
R1923
R1926
C1907
1
D1401
D1901
IC803
F1004
D1703
C1701
Z1010
CN803
R1708
C1014
D1701
6.3A-125V
R1707
E
B
Q1708
MDPOUT
FCD
K1004
E
Q1707
B
R1706
MDGND
B
E
C1006
Z1009
MD+B
Q1706
C1017
SW5V
K1002
D1015
MGNDB
D1012
B1801
1
CN801
12
CDGND
SAFETY3
INL
INR
CD+B
SAFETY2
AGND
MGNDA
SW10V
US6V
MICONGND
D1014
C1016
C1015
D1013
1
+B
US6V
POUT
B1802
AGND
4
CN805
4
D1004
D1001
C1004
C1001
Z1008
1
2.5A-125V
D1402
BC
DE
F
G
HA
I
2-9
Page 83
UX-F70MD/UX-F72MDUX-F70MD/UX-F72MD
Tuner board Block No. 03
6
5
4
CD servo control boar d Block No. 04
Forward side
R255
R285
SW101
M852
R812
C802
C815
C658
C821
C822
CN651
R809
C812
R254
SW102
R604
C611
C608
C605
R603
IC601
R611
C651
C652
R613
C679
X651
R617
C612
R661
R659
C661
R672
R665
C606
C676
C663
C665
C667
C610
R668
R664
C668
R669
C673
R662
R685
CN601
C622
C617
R682
C677
C624
IC651
R671
Q631
R677
R634
R632
C631
C678
C657
R652
R653
R654
IC291
C291
K656
K655
R291
R292
R293
C653
R651
K657
K658
R258
R260
C292
R804
R803
C254
R805
R801
C801
R808
R284
R261
R256
R813
R282
C816
R281
C261
M851
R283
R257
R802
C272
R272
R271
CN605
C271
CN606
CN607
X251
Reverse side
R636
C633
R864
R656
R655
K652
C621
R683
R679
C623
D602
R666
C622
R608
C616
C612
C602
C615
C656
R607
C614
C682
C683
R657
TP1
R667
K651
R663
R658
C680
C664
C601
C603
C681
Q651Q652
C679
R673
Q673
C654
IC652
C254
IC801
C255
CN651
D292
C822
R263
R678
R259
M851
C256
C813
C818
C811
R811
C814
3
CN671
R262
R276
R273
R274
2
R275
X251
IC251
R265
R264
SW102
D251
R251
R252
R253
C273
1
SW101
C861
C817
C632
TP2
R631
D601
D603
C863C864
R863
R861
M852
C631
R601
R602
C655
R635
C604
C624
R675
C657
C862
R862
C673
BC
DE
2-10
F
G
HA
I
Page 84
UX-F70MD/UX-F72MD
MD servo board Block No. 05
C323
R328
C324
C326
C325
6
R324
R327
R321
R322
R323
R326
C375
C376
R376
R375
R377
C377
5
R380
C380
R379
R382
R378
C379
R381
CN407
IC350
R422
R420
R428
C327
IC390
R430
4
R391
C321
C310
R389
IC310
R392
C405
R387
R361
R390
R393
R399
R369
R356
R362
C406
R320
R368
R363
R563
C407
R314
R315
D351
C307
C390
R396
R564
R313
C300
D350
R537
C318
C378
C408
R394
R364
R565R566
C319
R309
R534
R317
R340
C314
R310
R512
R511
R514
CN408
R316
R536
R510
C328
R306
R305
R513
R367
R567
R343
C301
R532
R535
R531
R301
R302
IC500
C303
R398
R397
R339
R335
R533
R546
R547
R548
R502
R501
R569
R568
C501
X500
IC590
C511
C502
R559
R593
R541
R570
(Forward side)
C488
R592
R504
R591
C591
R562
R561
R355
R560
R530
R529
R528
R540
R538
C412
R503
C415
C416
C402
R401
Q400
R404
R354
Q401
C359
C409
C401
R427
C427
R431
C484
R403
R402
R425
C425
C429C431
R429
C400
C403
C421
C489
R423
C423
IC485
IC400
IC410
C490
R421
C497
K522
C493
K523
C496
K521
R497
C411
K524
CN521
CN522
C410
K496
K495
L525L526
Traverse mehanism board Block No. 06
(Forward side)
S601
(Reverse side)
(Traverse mechanism board)
S602
MT602
CN601
MT601
(MD servo board)
(Reverse side)
R496
C495
C494
R495
R481
C487
R483
C481
C452
R492
C491C492
C451
IC450
C455
R451
R454
R456
R491
D454
R490
C456
R453
R452
C483
C486
C485
R395
C453
D453
R455
R557
R437
R439
R558
R555
D452
D451
C482
R521
R556
C433
R436
C437
K505
C439
R509
C435
R435
R554
R553
R433
R434
R552
R438
R432
R551
R517
Q411
C510
Q410
3
IC480
C480
C590
K492
K491
R519
R515
R518
K528
K529
K530
K531
K527
K532
TP422
CN451
Q451
C450
2
1
R549
C515
R522
R545
C342
C333
R342
R338
R336
R523
C341
Q331
R341
R506
IC340
C340
R311
R524
D310
R525
C512
C315
R337
C334
CN321
Q330
R331
Q332
R366
R371
R365
R372
C302
C317
R516
R300
R520
R333
Q333
R312
R334
R332
C361
C316
C330
R330
R370
X350
C331
K346
R440
R441
C358
C320
C322
C311
C312
C351
C355
K353
R426
R424
C350
R325
L351
C329
C391
L352
C354
C353
C352
BC
DE
F
G
HA
I
2-11
Page 85
UX-F70MD/UX-F72MDUX-F70MD/UX-F72MD
Head amplifier board Block No. 07
6
MB
PBR
PBL
RECR
RECL
5
4
3
VR37
L301
VR31
R314
C308
B155
R315
R327
C310
Q302
C319
C221
R313
C314
AG
C313
C317
C121
B112
SW8V
L303
C316
AG
1
MS
R310
R335
MG
CN34
C106
Q103
B198
R353
Q305
R305
C307
Q321
R303
R122
Q101
C103
B163
R221
10
B156
C303
R115
B157
R108
R101
C113
R110
R109
R102
C110
1
C108
C107
C104
9
R301
R121
B151
R112
R111
C102
R107
B152
C111
C302
R103
1
B164
C301
C306
R304
B158
8
B106
C101
C109
6
B166
R116
9
R212
R211
C211
9
IC32
R216
B101
C201
B109B108
C209
CN33
R342
C213
R210
R209
C207
B159
16
B102
R341
C208
R207
1
CN31
B200
B110
1
R340
R205
R105
C105
R208
B160
NC
R343
C305
C206
R201
R345
TAP
C304
1IC31
B113
RRE
C202
C210
Q331
SOL
C375
C205
B161
R215
R339
C203
C334
MG
R106
R206
5V
R204
C204
R203
B168
PHO
B153
R104
R222
R202
C333
PLA
R375
Q201
C332
Q372
Q203
C331
R331
FRE
B167
70u
B162
16
1
10
CN32
R372
R373
C371
R371
Q375
R376
E
C374
R338
D375
E
R337
C376
Q371
R336
9
8
Q376
IC33
Cassette switch board Block No. 08
B
B
SW1SW2SW3
D1
T01
P1
CN1
IC1
SW4SW5
SW6
2
1
BC
DE
2-12
F
G
HA
I
Page 86
UX-F70MD/UX-F72MD
PARTS LIST
[ UX-F70MD ]
[ UX-F72MD ]
* All printed circuit boards and its assemblies are not available as service parts.
Area suffix
UB --------------------- Hong Kong
UF ---------------------------- China
- Contents -
Exploded view of general assembly and parts list (Block No.M1)
CD mechanism assembly and parts list (Block No.MB)
MD mechanism assembly and parts list (Block No.ME)
Cassette mechanism assembly and parts list (Block No.MP)
Electrical parts list (Block No.01~08)
Packing materials and accessories parts list (Block No.M3,M5)
L.BASE ASSY
CH.BASE ASSY
FEED MOTOR
SPECIAL SCREW
MOTOR GEAR
CD PICK UP
RACK PLATE
MINI SCREW
C.D SHAFT
SPECIAL SCREW
P.S.SPRING
TAP SCREW
T.T.ASSY
SP.MOTOR
SPECIAL SCREW
FPC
SPECIAL SCREW
INSULATOR
INSULATOR
TRAY
CL.BASE ASSY
T.SCREW
SPACER
T.SCREW
LOADING ASSY
CAM GEAR
SLIT WASHER
MINI TAP SCREW
WIRE HOLDER
L.MOTOR ASSY
MOTOR
E-SI C WIRE C-F
MOTOR PULLEY
MINI SCREW
BELT
MINI TAP SCREW
SPACER
SPACER
SLIDE BASE R
SLIDE BASE L
MINI TAP SCREW
LOAD.MECHA BASE
FPC CABLE
MINI TAP SCREW
TM.CHASSIS ASSY
SP.MOTOR BASE
COLLAR
SPRING
SCREW
SP.MOTOR
MINI TAP SCREW
T.TABLE ASSY
SHAFT HOLDER R
SHAFT HOLDER F
GUIDE SHAFT
MINI TAP SCREW
T.SPRING HOLDER
COM.SPRING
MINI TAP SCREW
FEED MOTOR BKT.
MINI SCREW
MOTOR
FEED WORM
MINI TAP SCREW
SCREW SHAFT
S.SHAFT GEAR
PICK UP GUIDE
MINI TAP SCREW
MD PICK UNIT
FPC CABLE
RACK SPRING
MINI SCREW
CHASSIS B.ASS'Y
REEL GEAR
B.T. SPRING
PLAY IDLE GEAR
BLIND
EARTH SPRING
HEAD MOUNT ASSY
CASSETTE SP.
PLAY SW LEVER
CONTROL CAM
HEAD BASE SP(R)
HEAD BASE SP(L)
BRAKE(R)
BRAKE(L)
T.SCREW
MAIN PULLEY ASY
FR ARM
SWING SPRING
TRIGGER ARM
FR SPRING
ELEVATOR SPRING
WASHER
T.SCREW
CLUTCH ASS'Y
F.WHEEL ASSY(R)
SLIT WASHER
F.WHEEL ASSY(L)
SLIT WASHER
DC SOLENOID
CAPSTAN BELT
D.C.MOTOR ASS'Y
MOTOR PULLEY
SCREW
T.SCREW