Panasonic rx dt 401 service manual

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ORDER NO. M0930301708

Service Manual

Portable Stereo CD System Radio Cassette

RX-DT401

t t

t t

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:0"!an Colour
(K) ..... Black Type
DIGITAL AUDIO Area
Suffix f0! -
Model No. Area °°'°'
MASH* '
. . . (EB) Great Britain
muIIr-slixenoiseshapmr, ,
(ES) FR Germany & Italy (K)
(GN) Oceania

Tape section: sc-zow Mechanism Series
CD section: Traverse deck series (RAEO111Z)

I SPECIFICATIONS

General: . Radio Section:
Power Requirement: AC; 230~240V. 50H: Frequency Range: FM1,2; 87.5 ~ 108 MHz

Battery ; 15V (10 RQO/LFIZO size, LW ; 144 - 288 kHZ

UM-i batteries) MW ; 522 ~ 1611 kHz

Memory Back-up Battery tor computer; Intermediate Frequency: FM; 10.7 MHz

6 V (4 RGILRG size, UM»3 batteries) AM; 459 kHz
Power Consumption: 45W (AC only) Sensitivity: FM1,2; 12 dB/50mW output
Power Output: 50W (PMPO) - (. 3 dB Limit Sens.)
Speaker: Woofer; 10cm_(4') x 29.79) MW ; 49 dBISOmW output
Outputs: HEADPHONES; 329. t) 3.5 . LW ; 54 dB/mISOmW output
Dimensions: 610(W) x 182(H) x 262(0) mm Tape Deck Section:
Weight: 5.5 lg without batteries. Frequency Range: - 40~14,000 Hz (with normal tape)

Recording System: AC bias (1 00kHz). Ac erase

Disc Player Section: Tape Speed: 4.8 cm/s (Whips)
Sampling Frequency: 441 kHz Monitor System: Varlable sound monitor .
D- A Conversion: MASH (1 Bit D AC) Track System: 4-track 2-channel stereo recording and

Beam Source:

No. of Channels:
Frequency Flange:
Wow and Flutter:
Decoding:

Semiconductor laser
(wavelength 780 nm)

2 channels, stereo
2o~20,000Hz (+0l-2 dB)
Unmeasurable

16-bit linear

Notes:

Fast forward and Rewind
time:

playback
Approx. 120 Sec with 0-60 casseette
tape

*MASH

. MASH (Mum-Stage Noise Shaping) is an etiectwe
oversampling D/A conversion technique which
realizes a high SIN ratio and needs no highly complex
manufacturing processes such as a laser trimming.

- MASH is a trademark of NTT (Nippon Telegragh and
Telephone Corporation).

1. Weights and dimensions shown are approximate.
2. Design and specifications are subject to change without notice

Panasonic

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nx-or4o1 J

I CONTENTS

0 PRECAUTION OF LASER DIODE ............................
HANDLING PRECAUTIONS FOR TRAVERSE DEC

OLOCATION OF CONTROLS ....................................... - 6
0 DISASSEMBLY INSTRUCTIONS ...7 ~ 9
OSCHEMATIC DIAGRAM ............ 10 ~ 20
'TERMINAL GUIDE OF IC'S ,TRANSISTORS & DIODES ........... 21
.PRINTED CIRCUIT BOARD DIAGRAM2 - 25

'AUTOMATIC ADJUSTMENT SEQUENCE OF THE DIGITAL

SERVO SYSTEM ..............................
O MEASUREMENT AND ADJUSTMENT
U WIRE CONNECTION DIAGRAM .....

OTROUBLESHOOTING GUIDE...
IFUNCTION OF IC TERMINAL .
IINTERNAL CONNECTIONS OF LCD
.BLOCK DIAGRAM ............
U MECHANISM PARTS LIS ..
OMECHANISM PARTS LOCATION ........................................ 45 ~ 46
oCABINET PARTS LOCATION.
OREPLACEMENT PARTS LIST
0 RESISTORS & CAPACITORS...
o CDREPLACEMENT PARTS LIST

CAUTION:
THIS PRODUCT UTILIZES A LASER.

USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCES OR PROCEDURES OTHER THAN THOSE SPECIFIED
.HERIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE .

I 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 1.1WNDE

Laser radiation from the pick up lens is within saiety level ,but take precaution on the followings:

1. Do not disassemble the optical pick up unit ,slnce radiation lrorn exposed Iaser diode is dangerous .
2. Do not adjust the variable resistor on the pickup unit .1! has already been adjusted .

3. Do not look at the focus lens using optical instruments .

4. it is Not advisable to look at the pick up lens for a long period of time .

ACHTUNG: Dieses Produkt enth'éiit eine Laserdiode. Im eingeschalieten Zustand wird unsichtbare Laserstrahlung von der

Lasereinheit abgestrahlt.

Wellenl'énge: 760 nm

Maximaie Strahlungsieistung der Lasereinheit: 1ODuWNDE

' Die Strahlung an der Lasereinheit ist ungéiahnioh, wenn folgende Punkie béachtet werden:

1. Die Laserainheii nicht zerlegen, da die Sirahiung an derfreigelegten Laserdiode gé'iahrlich ist.
2. Den werkseitig justienen Einstellregler der Lasereinheit nicht verstelien.

a. Nlchi mlt optischen Instrumenten in die Fokussieriinse blicken.

4. Nicht fiber léingere Zelt in die Fokussierlinse blicken.

CLASS 1
LASER PRODUCT

LUOKANI LASERLAITE
KLASS 1 LASER APPARAT

(Back of product)
(Tuoteen takacsassa)--
(Apparatens baksida)

. ADVANSELNSYIILIG LASEHSTHALIIIB
VED ABNING, NAH SIKKEHHEDSAF-

(lnderslden at spparatet)

DANGERipvisibIe laser
radiation when open
and interlock defeated.
AVfliD DIRECT EX
PUSURE TU BEAM.

(Inside aI product)

VARDI Avlmusai:
:uoilikitus onixenmn
olelalttlin '
Lannitoily .
Ali hill: site's-en.

kymitfm

VAHNINGI Osyniig
llaemrllning nir Henna
«I it own och
wimn Ir u plan.
3mm el tl'ri In.

onznseu Usynlig
humming n5: dIan
Apnea on Iikkernedslk
bryln. unngl

«spun-ring lot sullen.

BRYDERE ER uns AF rummau.
unmet unsmase run minus.

(marten sissna)
(Appalatens inside)
(Fradukistsinnside)

-2;

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