Technics SLPD 627 Service Manual

Page 1

ORDER NO. ADS20308401

Service Manual

@COMPACT

MASH

mulli- 5" min shaping

m

DIGITAL AUDIO

NEW MECHANISM SERIES (RAE0201-1)
SPECIFICATIONS

I Audio
No. of channels
Frequency response

2 (left and right, stereo)
2-20,000 Hz, :1 dB

Output voltage 2 V (at 0 :18)
Dynamic range 92 dB
SIN ratio 100 63

Total harmonic distortion
Wow and flutter

DA converter

Output impedance

Load impedance

0.009% (1 kHz, 0 dB)
Below measurable limit
MASH (1 bit)

Approx. 1 kn

More than 10 k0

.CONTENTS

PRECAUTION OF LASER DIODE.
SAFETY PRECAUTION
ACCESSORIES .........
LOCATION OF CONTROLS AND COMPONENTS
CONNECTIONS
BEFORE MOVING
BASIC OPERATING PROCEDURE
HANDLING PRECAUTIONS FOR OPTICAL PICKUP..
INSTRUCTIONS FOR TRAVERSE OIL
DISASSEMBLY INSTRUCTIONS ......
HOW TO CHECK THE MAIN AND SERVO P.C.B.
OPERATING THE UNIT WITHOUT THE FRONT

PANEL ASSY (OPERATION P.C.B. AND KEYS) ................ 18
DISPLAY FUNCTION OF AUTOMATICALLY-ADJUSTED
RESULTS (SELF-CHECK FUNCTION) ........................... 19, 20

Technics

Multi Compact Disc Player

SL- PD627

Colour
(K)... Black Type
Area

Suffix for
Model No. Area Colour

(P) u.s.A.

(K)
(PC) Canada.

>26 -Technics (or Panasonic) developed the world's first MASH
type DAC and ADC. MASH technology was invented by
NIT (LSI Labs).

0 MASH is a lrademark oi NTT.

I Pickup

Wavelength 780 nm
I General

Power consumption 13 W
Power supply AC 120 V, 60 Hz

430x130x401 mm
(165/16X 51/a>< 1525/32")
Weight 5.0 kg
(1 I .0 lb.)

Dimensions (WxHxD)

Note:
Specifications are subject to change without notice Weight and
dimensions are approximate.

DIGITAL SERVO SYSTEM...
TROUBLESHOOTING GUIDE.
MEASUREMENTS AND ADJUSTMENTS
TERMINAL FUNCTION OF ICS.
INTERNAL CONNECTION 0F FL .
BLOCK DIAGRAM .........
SCHEMATIC DIAGRAM
PRINTED CIRCUIT BOARDS ..
WIRING CONNECTION DIAGRAM
REPLACEMENT PARTS LIST .
CABINET PARTS LOCATION .
TRAVERSE DECK PARTS LOCATION..
REPLACEMENT PARTS LIST..
RESISTORS 8i CAPACITORS..
PACKAGING .........................

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SL-P 0627

.PRECAUTION OF LASER DIODE

CAUTION: This unit utilizes a class 1 laser. Invisible laser radiation is emitted from the optical pickup lens when
the unit is turned on:

Do not look directly into the pickup lens.

Do not use optical instruments to look at the pickup lens.

Do not adjust the preset variable resistor on the optical pickup.

Do not disassemble the optical pickup unit.

If the optical pickup is replaced, use the manufactures specified replacement pickup only.

Use of control or adjustments or performance of procedures other than those specified herin may

result in hazardous radiation exposure.

PWPPN.

I SAFETY PRECAUTION (This safety precaution" is applied only in U.S.A.)

Before servicing, unplug the power cord to prevent an electric shock.

When replacing parts, use only manufacturers recommended components for safety.

Check the condition of the power cord. Replace if wear or damage is evident.

After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

Before returning the serviced equipment to the customer, be sure to make the following insulation resistance
test to prevent the customer from being exposed to a shock hazard.

S-PPNr

INSULATION RESISTANCE TEST

0

1. Unplug the power cord and short the two prongs of the plug with a jumper wire.

2. Turn on the power switch.

3. Measure the resistance value with ohmmeter between the jumpered AC plug and each exposed metal cabinet
part, such as screwheads antenna, control shafts, handle brackets, etc. Equipment with antenna terminals
should read between 3M0 and 5.2M!) to all exposed parts. (Fig. A) Equipment without antenna terminals
should read approximately infinity to all exposed parts. (Fig. B)

Note: Some exposed parts may be isolated from the chassis by design. These will read infinity;

Antenna
terminal
Exposed Fx
metal metal
part part
Ohmmeter Ohmmeter
(Fi9.A) (Fig. 8)
Resistance = 3MQ-52 M9 Resistance = Approx co

4. If the measurement is outside the specified limits, there is a possibilty of a shock hazard. The equipment
should be repaired and rechecked before it is returned to the customer.

I ACCESSORIES

Remote control cable
[(SJA172-1).. .. (SJP2257T) ......................................... 1 pc.
SJA172 ,

Stereo connection cable
(SJP2249-3) ......................................... 1 pc.