Technics SL-PG420A Service Manual

ORDER NO. MB9203020C2
ervice Manual
® compact Compact Disc Player
. gee =
SL-PG420A
Colour
multi-stage noise shaping
(K)... Black Type
Area
Mam PCH
REP ISSLA-M
7 oe
SPECIFICATIONS passe C3 eMmEes2nrP
;—,
i Audio lf Genera Serce i — IS 3S | Cel CEEY-SS
No. of channels 2 (left and right, stereo) Power supply AC 50/60 Hz, 230 V~240 V
e@ Frequency response 2-20,000 Hz, +0.5 dB Power consumption 10W
Output voltage : 2 V (at 0 dB) Dimensions (WxHxD) 430x 103x283 mm
Dynamic range ; 96 dB Weight 3.6 kg
S/N ratio : ; 100 dB
Harmonic distortion 0.003% (1 kHz, 0 dB) Note:
Total harmonic distortion 0.005% (1 kHz, 0 dB) Specifications are subject to change without notice.
Wow and flutter Below measurable limit Weight and dimensions are approximate.
DA converter MASH (4 DAC)
Output impedance Approx. 600Q
Load impedance More than 10 kQ «Techni : a
Headphone output level 15 mW max. 320 (adjustable) echnics (or Panasonic) developed the world's first MASH
type DAC and ADC. MASH technology was invented by
,
i Pickup
NTT (LSI Labs).
& Wavelength 780 nm © >< MASH is a trademark of NTT.
CONTENTS.
a P Page Page
PLACEMENT. .....sscssssscssestesnesnesssosnornesesossonsncnnacsacssnsenasenssonsasennces 2 SCHEMATIC DIAGRAM .......scccssssccssseesssssenssesonscernceneneese 19~24
. CLEANING OF LENS... See TERMINAL GUIDE OF IC'S,
ACCESSORIES ..........-:s-cssersecssersess we 2 TRANSISTORS AND DIODEG.............:cccssescsesssesssennensncen 24
PRECAUTION OF LASER DIODE we 3 PRINTED CIRCUIT BOARDG...............scrsscsssrsssesecseseneees 25~28
LOCATION OF CONTROLS.......... we A WIRING CONNECTION DIAGRAM ..........ccccsssssscstsscreenserersees 29
CONNECTIONS wreisicsnciasssasccssccsesivcssesesensevosesvesnseortconssernssunsviniens 5 REPLACEMENT PARTS LIST..........-. . 30~32
DISASSEMBLY INSTRUCTIONG...........sscssssorssorssessesssessees 6~9 EXPLODED VIEWS .......:s:sscsccssesssee . 33~35
CHECKING OF THE SERVO P.C.B. .....:sssssscsssssssssssscessssssensnees 9 RESISTORS & CAPACITORS.. =. 36, 37
MEASUREMENTS AND ADJUSTMENTS . . . . . . . . . . . . . : 0 0 0 0 0 0 0 10, 11 PACKING uw. ccssenccssncessenenscnnnacsensccessosncucossessncsnansccenacenteonsenvennsarune 37
TERMINAL FUNCTION OF IC'S...... wee 12~15 TROUBLESHOOTING GUIDE....... :
BLOCK DIAGRAM. .....scsssssessesssssssssensoessesssaseunseassesssovaneasaes 16, 17
INTERNAL CONNECTION OF FL........sscssssssssnssssssenscncsnseses 18
* TECHNICAL INFORMATION .
* This technical information is located on pp 49~~56 of the SL-PU46A
: Service Manual (Order No. AD8902036C2).
, : Therefore, refer to that Service Manual.
Technics