Panasonic RX-DT505 User manual

ervice M
Portable Stereo CD System
COMPACT
oie
DIGITAL AUDIO
ORDER NO. AD9204111C2
anual
Radio Cassette
RX-DT505
Colour
CK). serene Ac Black Type
Areas
Suffix for
Model No. Area Colour
(EB) Great Britain
Europe and
(Ee) Germany
TAPE DECK: RX-FD55 MECHANISM SERIES (AR300)
TRAVERSE DECK: RX-DT55 MECHANISM SERIES (SODD110)
m@ SPECIFICATIONS
General:
Power Requirement:
Power Consumption:
Power Output:
Speaker:
Input:
Outputs:
Dimensions:
Weight:
Disc Player Section:
Sampling Frequency:
D-A Conversion:
Beam Source:
No. of Channels:
Frequency Range:
Wow and Flutter:
D/A converter:
AC; (EB)...240 V, 50 Hz
(EG)...220 V, 50 Hz
Battery; 15 V (10 R20/LR20, UM-1
batteries)
Memory Back-up for Computer/
Clock; 6 V (4 R6/LR6, UM-3
batteries)
43 W
50 W...PMPO
Woofer; 10 cm PM Dynamic speaker
2.79
Tweeter; 2 cm Ceramic speaker
MIX MIC; 5 mV/200~600Q, @3.5
HEADPHONES; 32Q, 23.5
CD OUT; 1 V(CD 0 dB)
680 (W) x 174 (H) x 263 (D) mm
6.6 kg without batteries
44.1 kHz
16-bit linear
Semiconductor laser
(wavelength 780 nm)
2 channels, stereo
20~20,000 Hz (+ 1/—2 dB)
Less than possible measurement data
MASH (1 BIT)
Notes:
Radio Section:
Frequency Range: FM; 87.5~108 MHz
LW; 144~288 kHz
MW; 522~1611 kHz
Intermediate Frequency: FM; 10.7 MHz
AM (LW/MW); 459 kHz
FM; 14dByuV
MW; 35 dB/m/0.5 mW output
LW; 40 dB/m/0.5 mW output
Sensitivity:
Tape Deck Section:
Frequency Range: 30~ 16,000 Hz (with normal tape)
30~ 17,000 Hz (with CrO:z tape)
Recording System: AC bias, AC erase (Deck 2)
Tape Speed: 4.8cm/s
Monitor System: Variable sound monitor
Track System: 4-track 2-channel stereo recording and
playback
1. Weights and dimensions shown are approximate.
2. Design and specifications are subject to change without notice.
Panasonic

RX-DT505
m CONTENTS
Page Page
@PRECAUTION OF LASER DIODE .....................005 2 e PREPARATIONS FOR CHECK AND ADJUSTMENT OF
@TIME ADJUSTING......... 000... ccc cee cee eee eeeeee 3 PLC Bes watancthce sas mane teem alae de tee eee 45~48
@LOCATION OF CONTROLS ......... 0... c ccc cccccceceuue A~7 eMEASUREMENTS AND ADJUSTMENTS ............ 49~52
e@HANDLING PRECAUTIONS FOR TRAVERSE DECK ...... 8 eSELF DIAGNOSTIC FUNCTION................-.. 00 52
@DISASSEMBLY INSTRUCTIONS .............20..0000. 8~20 eTROUBLESHOOTING GUIDE .................. 0. 53, 54
FT se RAGE TCL Ona Wirek a DiI ured 20 @FUNCTION OF IC TERMINALS ...........0..00.0000- 55~54
@SCHEMATIC DIAGRAM .......cccccccccccccccccecee 21~32 @BLOCK DIAGRAM...........0 0... c cece cee eee + 60~66
@CIRCUIT BOARD DIAGRAM ...............00.00000. 33~38 eREPLACEMENT PARTSLIST .............. 67~74, 77, 78, 84
eWIRING CONNECTION DIAGRAM .................... 39, 40 @LOADING UNIT PARTS LOCATION ................005 75, 76
@CHECKING THE OPERATION PROBLEMS ON THE @MECHANISM PARTS LOCATION ...............00005 79~81
TRAVERSEDECK
....................000
41,
42
@CABINET
PARTS
LOCATION
..........0...0.0.c00ee
cues
82,
83
@DIGITAL SERVO SYSTEM ......... 000.00. c cece ee. 43, 44
CAUTION:
THIS PRODUCT UTILIZES A LASER.
USE
OF
CONTROLS
OR
ADJUSTMENTS
OR
PERFORMANCE
OF
PROCEDURES
OTHER
THAN
THOSE
SPECIFIED
HEREIN
MAY
RESULT
IN HAZARDOUS
RADIATION
EXPOSURE.
m™ PRECAUTION OF LASER DIODE
CAUTION:
This
product
utilizes
a
laser
diode
with
the
unit
turned
“on”,
invisible
laser
radiation
is
emitted
from
the
pick
up
lens.
Wave length: 780 nm
Maximum output radiation power from pick up: 100 ujW/VDE
Laser radiation from the pick up lens is safety level, but be sure the followings:
. Do not disassemble the optical pick up unit, since radiation from exposed laserd diode is dangerous.
. Do not adjust the variable resistor on the pickup unit. It was already adjusted.
. Do not look at the focus lens using optical instruments.
. Recommend not to look at pick up lens for a long time.
hWONMD—
ACHTUNG:
Dieses
produkt
enthalt
eine
laserdiode.
Im
eingeschalteten
zustand
wird
unsichtbare
laserstrahlung
von
der
lasereinheit
abgestrahlt.
Wellenlange: 780 nm
Maximale strehlungsleistung der lasereinheit: 100 upW/VDE
Die strahlung an der lasereinheit ist ungefahrlich, wenn folgende punkte beachtet werden:
Die lasereinheit nicht zerlegen, da die strahlung an der freigelegten laserdiode gefahrlich ist.
Den werksseitig justierten einstellregler der lasereinreit nicht verstellen.
Nicht mit optischen instrumenten in die fokussierlinse blicken.
Nicht uber langere zeit in die fokussierlinse blicken.
PwON>
CLASS 1
LASER PRODUCT
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT

RX-DT505
- VARO! Avattaessa ja
ADVARSEL: USYNLIG LASERSTRALING suojalukitus ohitettae-
VED
ABNING,
NAR
SIKKERHEDSAF-
ssa
olet
alttiina
BRYDERE ER UDE AF FUNKTION. nakymattémalle
UNDGA UDSATTELSE FOR STRALING. lasersateilylie.
Ala katso sdteeseen.
VARNING! — Osynlig
“Msi -Anvisi laserstralning nar
VORSICHT-Unsichtbare § DANGER-Invisible denaadal-ai bppiad
Laserstrahlung,
wenn
oo
when
och
sparren
ar
Abdeckung geiffnet.
Nicht dem Strahl
aussetzen.
@ TIME ADJUSTING
Before operation, press the operation switch to turn on the
unit.
For example:
To set the time at 16:20.
1,
Press the timer mode button, and then turn the jog dial to
select the “CLOCK” mode
The display will change to “P-TIMER’-"R-TIMER™—
“SLEEP"—"“CLOCK".
Press the SET button.
. Turn the jog dial to adjust the correct hour display.
FWD: Increase.
REV: Decrease.
if
1
Ant 7
Et
cS |
Na
1
,
fi
rt
Flashing
Press the SET button.
AVOID
DIRECT
EX-
urkopplad.
POSURE
TO
BEAM.
Betrakta
ej
stralen.
VARO! Avattaessa ja
suojalukitus ohitettae-
ssa olet alttiina
nakymattomalle
lasersateilylle.
Ala katso sateeseen.
ADVARSEL: USYNLIG LASERSTRALING
VED ABNING, NAR SIKKERHEDSAF-
BRYDERE ER UDE AF FUNKTION.
UNDGA UDSATTELSE FOR STRALING.
VARNING! Osyntig
laserstralning nar
denna del ar oppnad
och sparren ar
urkopplad.
Betrakta ej stralen.
VORSICHT-Unsichtbare | DANGER-Invisible
Laserstrahlung, wenn = radiation when
Abdeckung gedffnet. AVOIO DIRECT EX-
Nicht
dem
Strahl
POSURE
TO
BEAM.
aussetzen.
Fig. 2
1
MODI
3. Turn the jog dial to adjust the correct minute display. 4. Press the SET button to finish setting the time.
Note that the minute “00” display appears following “59”, The display will change to the previous display.
but the hour display is not changed.
When the SET button is pressed, the clock is reset to "0"
Nt
(Seo a | second.
L ! J When a wrong operation occurs while operations of
steps 1~3, press the cancel button, then the unit is
returned to the previous mode.
Flashing

RX-DT505
m@ LOCATION OF CONTROLS
The
functions
indicated
by
the
numbers
with
black
back
ground
(for
example
@)
can
also
be
activated
from
the
remote
control
transmitter.
(See
page
6.)
eCD/GENERAL CONTROLS
@ Operation switch
@ Play button (>)
Press this button to start the disc play.
© Volume control (VOLUME)
© CD mode/stop button (CD/D)
Press this button to listen to CD or to stop the CD
playing.
© CD open/close button (CD OPEN/CLOSE)
© Beep sound button (BEEP)
The beep sound (beep) will be emitted each time the
operation button is pressed. The beep function can be
turned on and off by pressing the beep button.
@) Extra bass system button (XBS LEVEL)
Tone level button (TONE LEVEL)
@ Compact disc edit button (CD EDIT)
Press this button to select the desired edit mode.
Automatic tape level setting button (ATLS)
@ ® ®
Press
this
button
to
begin
the
recording
from
a
CD.
@ Cancel button (CANCEL)
...t(‘
)}|
@
SET
button
(SET)
Ci
=
=a
3)
Jog
dial
(Al
JOG)
SS
= OOO —
fit
3
oy
|
Panel
cover
|____{
__}
\
(5)
Speakers
[Woofer]
(10
cm,
2.70)
—
4
Speakers
[Tweeter]
(2
cm)
—————————
- :
p——-F\
@
Operation/battery
check/AC
connection
indicator
ey
(OPR/BATT-STANDBY
(')
)
NO
see
er
The
indicator
lights
green
when
the
unit
is
turned
on.
It
C—O functions as a battery check indicator when the unit is
Pe
_|__1]
operated
on
batteries.
When
the
AC
mains
supply
is
used, it functions as an AC connection indicator. (The
indicator colour changes to red when the unit is turned
@
@®
®
@
oft)
:
Remote control sensor
Disc tray
@0) Headphones jack (PHONES) (23.5, 320)
@)) Display section
: CD mode indicator (Cd)
: Track display
: Playing time display
: Repeat indicator ((@5))
: Program indicator ([PROGRAM))
Random indicator (RANDOM)
: Music matrix
: Over mark indicator ([>})
: Volume level display (VOLUME)
au VOLUME
THe t
“def, ot f
-~-xo™mooupr

TUNER CONTROLS
@® Tuner band button (TUNER, BAND)
Press this button to select the desired radio band.
@3 Tuning mode button (TUNING MODE)
@ Display section’
: Band indicator (FM/LM/MW)
: Frequency display
: Channel number indicators
: Program indicator ([PROGRAM]))
: Tuning indicator (Gy)
: Stereo indicator (iia)
: Monaural indicator ([MoNo ])
If the FM mode/beat proof button on the remote
control unit is used to select monaural mode, this
indicator will appear.
om7mmooawp
DECK CONTROLS
RX-DT505
@3)
MODE
(= ONE TOUCH EDIT —
CNCRMAL [IGH TT seer)
TAPE CONTROL
(Corcx v2 Reverse wopeoourenncse] | om [as _)
) ) G2 )
| @&KXIER)
DECK 1 DECK 2
_) Gea
boa
MODE

RX-DT505
@ Fast/tape program sensor buttons (<J<] DP)
Press one of these buttons to fast forward or rewind the
tape during stop condition, or to skip to the beginning of
the next or present tune during playback.
@ Tape mode/stop button (TAPE/X)
Press this button to listen to tapes or to stop the tape.
@ Reverse-side playback button (<))
Press this button to begin the playback (or recording)
from the reverse side of the tape.
@ Forward-side playback button ([>)
Press this button to begin the playback (or recording)
from the forward side of the tape.
@9 Edit recording buttons (ONE TOUCH EDIT)
Press one of these buttons to start the synchronized edit
recording.
€) Deck selector (DECK 1/2)
Press this button to select the operation deck (deck 1 or
2).
eTIMER CONTROLS
@)
—— ONE TOUCH EDIT — MOOE MODE
(NORMAL rie eer) we BS LEVEL] eel
| eon 2
@}) Reverse mode select button (REVERSE MODE)
@2 Counter reset button (COUNTER RESET)
Press this button to reset the tape counter.
@® Rec-pause button (@ #1)
Deck 1 cassette eject button (4 EJECT)
@5) Deck 1 cassette compartment cover
Deck 2 cassette compartment cover
@? Deck 2 cassette eject button (4 EJECT)
Display section
: Tape mode indicator (TAPE)
: Tape counter
: Running indicator
: Deck 1/2 indicators (EEN
: Reverse mode indicator (C_))
Link edit indicator ([Link]})
: Edit indicator ([EpiT})
: Automatic tape level setting indicator ([aTLs
: Recording indicator (GTx&)
: Tape direction indicators (<!<1 >>)
e-rommooo>r
Timer play button (PLAY-TIMER)
Press this button for timer play.
Timer recording button (REC-TIMER)
Press this button for timer recording.
@ Sleep button (SLEEP)
Press this button when you wish to fall asleep while
listening to music.
@ Timer mode button (TIMER MODE)
Display section
: Timer ON indicator (ON)
: Timer play indicator (TIMER)
: Timer recording indicator (TIMER-REC)
: Timer OFF indicator (OFF)
: Sleep timer indicator (SLEEP)
: Time display
12m0O0OO >

RX-DT505
@REAR PANEL SECTION
@ Telescopic antenna
@) Handle
AC socket (AC IN~)
@ Battery compartment cover
CD output jacks (CD OUT) (1 V, CD 0 dB)
Mixing microphone jack (MIX MIC) (@3.5, 200~600Q)
eREMOTE CONTROL OPERATION
@ Numeric buttons (1-10/0, +10)
These buttons are used to specify the CD’s track (1-10,
+10), and select the preset memory channel of the tuner
(1-10).
@ Random button (RANDOM)
Press this button to let the microcomputer make a
random selection of the sequence.
@ Repeat button (REPEAT)
Press this button to activate the repeat mode. The repeat
indicator will appear.
@® Program button (PROGRAM)
Press this button for CD program-play and for preset
memory of the tuner.
® FM mode/beat proof button (FM MODE/B.P)
The functions of this button change according to the
selected radio band.
LW/MW: Beat proof (for recording from the LW/MW
radio)
FM: MONO/STEREO
@® Pause button (11)
Press this button to stop the disc temporarily.
@ Display button (DISPLAY)
Press this button when you wish to confirm the present
time while listening to CD, radio and tape.
@ Skip/search buttons (44/4. p> /pp})
Press one of these buttons to skip (backward or forward)
the tracks, or to search (backward or forward) the
desired portion of the disc.
Note:
Please refer to “LOCATION OF CONTROLS” for the con-
trols not described above.

RX-DT505
M@ HANDLING PRECAUTIONS FOR TRAVERSE DECK
The
laser
diode
in
the
traverse
deck
(optical
pickup)
may
break
down
due
to
potential
difference
caused
by
static
electricity
of
clothes
or
human
body.
So,
be
careful of
electrostatic
breakdown
during
repair
of
the
traverse
deck
(optical pickup).
Optical pickup
®Handling of traverse deck (optical pickup)
1. Do not subject the traverse deck (optical pickup) to static P Lens (Do not touch)
electricity as it is extremely sensitive to electrical shock. -
2. To prevent the breakdown of the laser diode, an anti-static
shorting pin is inserted into the flexible board (FPC board).
Variable resistor
(Do not turn)
When removing or connecting the short pin, finish the job in as FPC board
short time as possible. (Handle it carefully)
3. Take care not to apply excessive stress to the flexible board (FPC
board).
4. Do not turn the variable resistor (laser power adjustment). It has a
already
been
adjusted.
Be
sure
to
short
this
portion
~
Grounding for electrostatic breakdown (Use the shorting pin or clip.)
prevention
Clip
Shorting
pin
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity
from your body.
2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area where
the traverse deck (optical pickup) is placed, and ground the sheet.
Caution:
The static electricity of your clothes will not be grounded through the
wrist strap. So, take care not to let your clothes touch the traverse
deck (optical pickup).
1+M0
Iron plate or some metals
to conduct electricity
@ DISASSEMBLY INSTRUCTIONS
Use
a
Phillips
screwdriver
whose
blade
is
13
cm
Be
sure
to
place
the
unit
on
soft
cloth
or
similar
material
to
long
and
over
to
remove
screws
fixing
the
rear
prevent
scratches
when
disassembling
it.
cabinet.
=>
13 cm long and over—
Soft cloth
Handie
1.
Remove
2
screws
(@,
@).
2.
Slide
out
the
handle
in
the
direction
of
the
arrow.

|__ RX-DT505
Ref. No.
2 Removal of the Front Cabinet | Front cabinet
Procedure
t
12
ve | eo =\, \
1. Remove the battery cover.
2. Remove 6 screws (@~@).
Speaker output
connector (CP601)
Notes:
®Note that the two claws (shown in the right figure) hook the front
cabinet when removing the front cabinet.
i i not to bend pins of the speaker output connector Claw Giaw
eee || Removal of the Operation P.C.B. a ies Removal of the Operation Button
Procedure Procedure
1-2-3 | 1523-4
Nets See te a Soe fe See oe ee
Operation button
1. Remove 2 screws (@, @).
2. Release 3 claws in the direction of arrow @).
3. Remove the operation P.C.B. in the direction of arrow @.
daa
Removal
of
the
Cassette
Panel
Procedure
-
1-2-5
Release 8 claws in the direction of arrows.
3
\
‘Cassette panel
Sealing panel
3. Pull out the jog dial.
1.
Open
the
sealing
panel.
4.
Release
2
claws
in
the
direction
of
arrow
@.
2.
Remove
3
screws
(@~®).
5.
Remove
the
cassette
panel
in
the
direction
of
arrow
@.

RX-DT505
Ref. No.
Removal of the Main Unit
Procedure
1-25-56
Note:
Hold the CD unit
so as not to slip it
down.
Main unit
CD unit
3. Since the CD unit is not mounted on the main unit, be sure
1.
Release
the
connector
(CP901).
to
hold
the
CD
unit
so
as
not
to
slip
it
down
and
remove
it
2.
Remove
2
screws
(@,
@).
from
rear
cabinet
as
shown
above.
Removal of the Mechanism Unit
Procedure
1>2—5-7
Mechanism unit
. Remove 6 screws (@~@).
Remove the mechanism unit.
Release 4 connectors (J951, J971, CP301, CP302).
Resolder 2 solders.
Remove the screw (@).
. Release 2 bosses.
. Release 4 hooks.
. Remove 2 screws (@, ©).
SPNONAONS
Ref. No.
8
|
Removal
of
the
Al
Operation
Button
Removal
of
the
Al
Operation
P.C.B.
Procedure
Procedure
peo
1-2—5-8
1>2—5-—8—>
Al operation P.C.B.
1. Release the connector (CM801).
Release
6
claws
in
the
direction
of
arrows.
—4o=
2. Release 7 claws in the direction of arrows.

RX-DT505 RX-DT505 |
Removal of the Al Operation P.C.B. : Removal of the Relay P.C.B. (1) Ref. No. Removal of the Disc Tray
Holder Removal of the CD Unit pee | and Relay P.C.B. (2) 16 Ornament
(— = Pe
Procedure
Procedure
Procedure
Procedure
1-2—-5-—>6—>
1—2—5—6—
1
25-6
8-—+9—10 11 1112-14-15
Disc tray ornament
Al operation
P.C.B. holder
Relay P.C.B. (1)
e@Remove the relay P.C.B. (1) and relay P.C.B. (2) in the Release 2 claws and remove the disc tray ornament in the
direction of arrow. direction of arrow.
CD unit Ref. No. Removal of the Power Supply Ref. No.
PCB. 18 Removal of the Battery P.C.B.
1. Release 2 connectors (CP790, CS702). T P d
2.
Remove
the
CD
unit
in
the
direction
of
arrow.
Procedure
e
(3)
rocedure
1-2—5—6—
17
1>2—5—6— Battery P.C.B.
Removal of the Tuner P.C.B.
Procedure Procedure
1 2— 5 > 6 1—-2—5— 6
12 8—9— 10-13
Earth plate CP902 Power supply P.C.B. ©
1. Release the connector (CP902).
1. Release the connector (CP902). 2, Remove the battery P.C.B. in the direction of arrow @ by
2. Remove 5 screws (@~@). keeping the claw pressed in the direction of arrow @.
Ref. No. Removal of the Back-up Battery Ref. No. Removal of the Woofer Speaker
19 P.C.B. 20
Headphones
Procedure
Procedure
Jack P.C.B. 1— 2-20 a Woofer @ e Woofer ®
, Speaker ri . speaker ”
: | ‘
1. Remove the screw (@). k- “SX
2. Remove the earth plate. Seie CB }
Release
3
claws
in
the
direction
of
arrows.
3.
Release
2
claws
in
the
direction
of
arrows.
iti
eae
=
a
Battery cover / \ / \
1. Remove the battery cover. a % A %,
Removal of the Main P.C.B. 2. Remove the ease eared P.C.B. sna arpa of 8 4) 7) 3)
arrow (2) by keeping the claw pressed in the direction of Remove 8 screws (Q@~®).
arrow (1).
Procedure g
1>2-5-6> : Ref. No Ref. No Removal of the Speaker Out
: . No. . No. ut
: : + Y Removal of the Tweeter Spe P P
11-1214
—
|
21
peaker
22
Connector
Procedure a Procedure
1>2->21
152-22
Speaker output connector
CD unit holder
1. Release the connector (CM801). 4. Remove 6 screws (@~@).
2. Remove 2 screws (@, Q). 5. Release 3 claws in the direction of arrow @.
3. Remove the CD unit holder. 6. Remove the main P.C.B. in the direction of arrow @.
Remove the tweeter speaker in the direction of arrow. Remove 2 screws (@, @).
=11= -12-

Procedure
152-523
Ea Removal of the Sealing Panel!
1. Remove the spring.
2. Remove the sealing panel by keeping the 2 ribs pressed in the
direction of arrow.
a
Removal
of
the
Cassette
Holder
Procedure
1>52—5-24
Cassette holder (DECK 2)
Cassette holder (DECK 1)
Eject button
1. Press the eject button and then open the cassette holder.
Removal of the Eject Lever, Eject
Button and Eject Rod
1-25-25
ee Cassette holder Cassette holder (DECK 2)
Eject button
1. Press the eject button to open the cassette holder (DECK
1 and DECK 2).
(ow aT mai
C=
d= ~ hel —
fe ahs AC
ie. 7 = . oer. Eject | button )
! 4
ofa
EE
ome
N
je
|
1
|
|
|
t
'
|
ey
4. Release 6 claws in the direction of arrow.
5. Remove the eject button.
RX-DT505
RX-DT505
Rib
Om 1 2
Spring (0) Oo COO
O Cae
" Sealing
Cassette panel
: Te panel
Oo oO O* © :
ral
2. Remove the cassette holder by keeping the ribs pressed in
the direction of arrow.
Eject lever Eject lever
,___ (DECK 2) | (DECK 1)
©m om if I Hi}
C=
©)
¢ oJ
fo oO QO OF
we) ee ey u
Aa
Eject spring Eject spring
(DECK 2) (DECK 1)
2. Remove the eject spring.
3. Remove the eject lever in the direction of arrow.
| Claw Ejectrod |
6. Fit the claw into the groove of the eject rod.
7. Remove the eject rod in the direction of arrow.
-13-
Ref. No.
26
Procedure
1525-6
Removal of the Disc Clamper
Disassembly of the disc clamper
1. Release 3 claws in the direction of arrows.
2. Disassemble the disc clamper as shown above.
Peer oe
Rib Claw
|
| TIL)
Procedure
1—2—5—6—>
11-26-27
1. Slide the lever fully in the direction of arrow @.
(The traverse unit goes down.)
4. Lift the disc tray in the direction of arrow @.
5. Unfasten the rib from the claw of the chassis.
+ oe
rim
be
2. Remove the disc tray slightly in the direction of arrow @
to unfasten the claw and the rib.
3. Remove 2 screws (@, @).
cs)
~
Shaft
Slider
6. Remove the screw @.
7. Remove the slider and the shaft.
Removal of the CD P.C.B.
Procedure
11-28
1. Remove 2 screws (@, @).
2. Release 2 claws in the direction of arrows.
3. Lift the CD P.C.B.
4. Release 3 connectors (CS701, CP702, CP703).
—~14-

RX-DT505
Ref. No.
29
Procedure
1 2—5—6—
1126-27-29
Removal of the Traverse Unit
Traverse unit
1. Slide the lever in the direction of arrow (1). 4. Remove the lead wires.
2. After the lever is slid, the traverse unit goes down. Slide the disc
tray in the direction of arrow @.
3. Slide the disc tray fully in the direction of arrow @).
Turn table
Traverse unit
5. Remove the two pins using a regular screwdriver. 6. Lift the traverse unit.
(Be especially carefui not to scratche the turntable.)
Procedure
1>2—5-—6—
11—26— 27-28
—>29— 30
1. Slide the gear in the direction of arrow @ by holing 2. Make sure that the bosses are fit in the 3 grooves of
the claw pressed in the direction of arrow @. the traverse chassis.
(Itis enough to slide the gear but very little.) 3. Lift the traverse chassis by keeping the two claws
pressed in the direction of arrow ©.
=45=

RX-DT505
Removal
of
the
Lever
@
Removal
of
the
Lever
Procedure Procedure
1-2—5—-6— 1—-2—5-—6—
11— 26—27—28— 11> 26— 27— 28-—
29-30-31 29> 30->31—32
Lever
Remove the lever @ by keeping the lever © pressed
in the direction of arrow.
Removal of the Lever ©
Procedure
1—2— 5 6—
11 26—> 27 28—
29— 30> 32-533
2. Release the claw in the direction of arrow.
Remove the lever © in the direction of arrow @ by keeping
the claw pressed in the direction of arrow @.
Procedure
152—5-—-6—>
11— 26— 27— 28—
29—>30—31—32—
33— 34
®Slide the lever © fully in the direction of arrow and pull out
the lever ©).
Removal of the Loading Motor and
Loading switch
Procedure
1 2—5—6—
11+ 26-27-35
Loading motor P.C.B.
3. Remove the screw (@) and
1.
Remove
the
belt.
remove
the
loading
motor.
2. Remove 2 screws
(@. @).
4. Resolder the 2 solders
@®.
Remove the loading
motor.
5. Resolder the solder B
and release 4 claws in
the direction of arrow.
Remove the loading
;
Loading
switch
ie
switch.
g
Loading
motor
a!
—~16—

1 RX-DT505 RX-DT505
eINSTALLING DISC TRAY UNIT ‘ead Engage the under tray gear
Ref. No. Removal of the Loading Pulley and
36
Loadi
G
with
the
disc
tray
gear.
sine
ical
1.
Install
the
under
tray
on
the
disc
tray.
Holder
°
Procedure
2.
Install
the
holder
on
the
disc
tray
with
the
two
screws
@
o>
1>2-5—-6—
and
@.
i
3.
Screw
the
under
tray
on
the
disc
tray
©.
<
|
Under
tray
11->26— 27-36
Make sure that the under tray moves smoothly after
installing the disc tray unit.
~Belt
1. Remove the belt. : 2. Release 2 claws in the direction of arrow.
eCD UNIT ASSEMBLY em
Ref.
No.
:
y
37
Removal
of
the
Loading
Roller
/
>
ea |
Procedure
j
1>2—5—6—
m
Claw
/
11-+26— 27-37 =
Pa —
Wa ~
® \
ss
\
Make
sure
that
the
claw
is
Claw
positioned
as
shown
above
|
J
after
installing
Lever
©.
\ @
\ y Roller 1. Install Lever © on the chassis by fitting the claws of Lever 2. Slide Lever © in the direction of arrow @ while keeping it
Ne Y © in the two grooves of the chassis. held down lightly in the direction of arrow (1).
“~~
e@Remmove the Loading roller in the direction of arrow @ by 3. Remove the pulley and gear. Lever
keeping the 2 claws pressed in the direction of arrow @).
Procedure
1-2—5— 6
. Remove 3 screws (@~®).
. Remove the gear in the direction of arrow @ by
keeping the 2 claws pressed in the direction of the
arrow (1).
4. Slide Lever © fully in the direction of arrow @).
5. Keep holding down the claw in the direction of arrow @)
3. Install Lever ©) on the chassis by fitting the claws of Lever and slide Lever © in the direction of arrow @) to stop.
in the three grooves of the chassis as shown above. (Slide but very littie.)
Boss Lever @
eINSTALLING OF SHAFT
Guide holder
1. Insert the shaft into the guide holder.
2.
Install
ihe
shaft
on
the
chassis
with
the
2
screws
(@,
@).
6.
Install
Lever
@
on
the
chassis
by
fitting
the
two
claws
of
7.
Install
Lever
©
on
the
chassis
by
fitting
the
claw
of
Lever
Lever
(@)
in
the
two
grooves
of
the
chassis
and
the
two
in
the
groove
of
the
chassis.
bosses
in
the
two
grooves
as
shown
above.
8.
Install
the
spring
on
Lever
®
and
the
chassis.
ApS — 18 -

9. Instail the traverse unit on the chassis by fitting the three
bosses of the traverse unit in the three grooves of the
chassis.
eINSTALLING DISC TRAY
Traverse unit
Lever
1. Move Lever ©) in the direction of arrow @ and Lever @ in
the direction of arrow @). (The traverse unit rises.)
Disc tray
6. Slider the under tray in the direction of arrow ©.
7. Hold the disc tray and slide the under tray fully in the
direction of arrow ©. (Slide but very little and the loading
gear is engaged with disc tray gear.)
f RX-DT505
RX-DT505
10.
Make
sure
that
the
traverse
unit
is
engaged
with
the
two
claws
@.
11.
Slide
Lever
©
in
the
direction
of
the
arrow.
Be
sure
to
check
if
claw
@)
is
set
as
shown
above.
(Slide
Lever
but
very
little.)
Disc tray
& Under tray
2. Screw the disc tray on the slider as shown above.
3. Slide the under tray fully in the direction of arrow @.
4. Slide the disc tray fully in the direction of arrow @.
5. Lay the disc tray down in the direction of arrow ©).
Traverse unit
Under tray
8. Move Lever @) in the direction of arrow @.
(The traverse unit is lowered.)
9. Slide the disc tray in the direction of arrow ©.
(Make sure that the under tray is moved in the direction of
arrow @).)
Traverse unit
10.
Slide
the
lever
in
the
direction
of
arrow
@
and
check
if
the
traverse
unit
rises
in
the
direction
of
arrow
@.
eINSTALLATION
OF
CASSETTE
HOLDER
Cassette holder
1. Install the spring of the cassette holder.
@INSTALLATION OF MECHANISM UNIT
Ay . Spring
Groove
Mechanism-.
unit
2.
Fit
the
spring
of
the
cassette
holder
1.
Install
the
mechanism
unit
by
connecting
the
into
the
groove.
connectors
correctly.
3. Fix the rib.
eINSTALLATION
OF
FRONT
PANEL
@MEASURE
FOR
TAPE
TROUBLE
—_«| — Speaker output == Se
connector
(CP601)
hh
aie
_
\
|
|
|
y
t
j
Tr
Install the front panel by connecting the speaker connector
correctly.
mLCD
-Front panel
ae at | y
/
Pulley Se Pulley ,
4 ee Me
If a cassette tape cannot be removed from the deck
since
the
tape
is
caught
by
the
capstan
or
pinch
roller
during playback or recording, rotate the pulley in the
direction of the arrow to remove the tape.
-20-

7 RX-DT505 RX-DT505
m SCHEMATIC DIAGRAM etunerico cIRUIT (Pars list on pages 67~73,)
1 2 3 4 5 6 7 8 9 10
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Notes:
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voltage
measurements
are
taken
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electronics
voltmeter.
=>
:
FM
Signal
Line
emma
|
FM
OSC
Signal
Line
®No switches or VRs. The negative terminal of the battery provides negative meter connection point.
i
LW/MW
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Signal
Line
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FM/LW/MW
Vcap
Control
Signal
Line
<for CD circuit> (__ )...LW/MW < >...FM ((__ ))...CD
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:
Rest
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‘
CD
Signal
Line
eVR701 : Best eye adjustment VR. eThis schematic diagram may be modified at any time with the development of new technology.
-21- —22-

RX-DT505 RX-DT505
10
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RX-DT505 RX-DT505
@ SCHEMATIC DIAGRAM ecoperatTioN/MAIN/RELAY/HEADPHONES/LOADING MOTOR/ POWER SUPPLY CIRCUIT (Parts list on pages 67~73.)
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