Technics SL-PD647 Service Manual

Service Manual
multi-stage noise SH i
anise [DIGITAL M ASH
WISI
DIGITAL AUDIO
NEW MECHANISM SERIES
(RAE0301: Type A/RAE0302: Type B)
SPECIFICATIONS
@ Audio
No. of channels
Frequency response
2 (left and right, stereo)
2-20,000Hz, +1dB
Output voltage ; 2V (at OdB)
Dynamic range ' 92dB
SIN 100dB
0.007 % (1 kHz, OdB)
Below measurable limit
MASH (1 bit)
Approx. 1kQ
More than 10kQ
Total harmonic distortion
Wow and flutter
DA converter
Output impedance
Load impedance
Mi CONTENTS
Page
PRECAUTION OF LASER DIODE ........cscsssssssssssssessnssensensnssanssaerene 2
ACCESSORIES wi siisicecincssiucsvscessdesinistesesces tes! ccesecosenicossedtoenssesecnestoece 3
CONNECTIONS w.. scseseereccssasessasasesaessesssesasstsecasasicivansannesucanansavagesossesie 3
FRONT PANEL CONTROLS AND FUNCTIONG..........:0c0cs0s00 4,5
BEFORE MOVING uu.........ssesssscsscssssesecncesecsarcnnensesoeenssneeseessessenneennenes 6
HANDLING PRECAUTIONS FOR OPTICAL PICKUP .............000 7
INSTRUCTIONS FOR TRAVERSE OIL ..........sessssssssssssstsnsesereneesors 7
DISASSEMBLY INSTRUCTIONS ..........c0sccssciestsssessssssecersencnse 8~15
HOW TO CHECK THE MAIN AND SERVO P.C.B. .............. 16, 17
OPERATING THE UNIT WITHOUT THE FRONT PANEL
ASS'Y (OPERATING P.C.B. AND KEYS) .........:scsccssesssesseae 18
DISPLAY FUNCTION OF AUTOMATICALLY-ADJUSTED
RESULTS (SELF-CHECK FUNCTION).........cccssescseeees 19, 20
NEW DIGITAL SERVO CIRCUIT.......c:cssccsecssssscsssssecssssssesereneeres 20
Technics
ORDER NO. AD9304104C8
Compact Disc Changer
SL-PD647
Colour
(K)... Black Type:
Area
Suffix for
© [ewe «|
Asia, Latin America,
Middle Near East
and Africa.
¢ Technics (or Panasonic) developed the world's first MASH
type DAC and ADC.. MASH technology was invented by
(K)
NTT (LSI Labs).
© MASH is a trademark of NTT.
@ Pickup
Wavelength 780nm
i General
Power consumption 15W .
Power supply
For (E, GN) areas.: AC 50/60Hz, 230-240V
For (GC) area: AC 50/60 Hz, 110V/127V/220V/240V
Dimensions (W x H x D) 430 x 130.x 401mm
Weight 5.0kg
Design and specifications are subiect to change without notice.
Weight and dimensions are approximate.
Page
NEW DIGITAL SERVO SYSTEM ...........essssenrersersenrseensnseseens 21, 22
TROUBLESHOOTING GUIDE..........sscsssenesee wu 23, 24
MEASUREMENTS AND ADJUSTMENTS..... wn 25, 26
TERMINAL FUNCTION OF IC'S.........esessseseeseee » 27~30
BLOCK DIAGRAM. .....ccscsserssssscssessesseenernesenrensnenense w 3133
SCHEMATIC DIAGRAM............ 34~39
PRINTED CIRCUIT BOARDS .............. . 40~43
WIRING CONNECTION DIAGRAM ....cccsssscsssssessenersessneseessseseeroene 44
INTERNAL CONNECTION OF FL.......cssssssssssssscrsseesnsssnsersnsesonsenss 45
REPLACEMENT PARTS LIST sssnseuad - 46~48
PACKAGING......... succenveucunandoaulbsGecedaccuadtsansccnedensansanstvastodssccivessdlceare 47
EXPLODED VIEWS...... 49~52
RESISTORS AND CAPACITORG.........sscssssssesssesssesnersesstecntestseneeee 53