Technics SLP 770 Service Manual

Page 1

ORDER NO. HA0880101800

Service Manual

[flCDMPACT

DIGITAL AUDIO

Color

El GIT/IL

(K) Black Type

SPECIFICATIONS

I Audio

No. of channels:
Frequency response:
Output voltage:
Dynamic range:

S/N ratio:

Harmovic distortion:

Total harmonic distortion:

Channel separation:
Wow and flutter:
Low-pass tiller:

Output impedance:
Load impedance:
Headphone output level:

I Signal Iormat
Sampling frequency:
Correction system:
D-A conmveision:

I Pickup
TYPE:

Light source:
Wavelength:
Traverse system:
Spindle system:

Technics

2 (left and right stereo)
2~20.000 HZ t0.2 dB

2.5 rms V (at 0 dB)

100 dB

113 dB

0.0013% (1 kHz. 0 dB)
0.0025% (1 kHz, 0 dB)

110 dB

Below measurable limit
Hight Resolution Digtal Filter
Approx. 6000

More than 10 km

100 mW max. 320 (adjustable)

44.1 kHz
Technics Super Decoding Algorithm
16-bit inner

Fine-focus one beam
Semiconductor laser

780 rim

High-speed linear access system
Brushless DD motor

Mlliulhlta Service: Company
50 Meadowland Parkway.
Secaucus, New Jersey 07094

Plnlwnlc Soles company,
oivliion ol Matsushlll Electrlc
ul Puerlo Rico. Inc.

Ave 65 De lnlanterla. Km. 9.7
Victor)a Industrial Park

Compact Disc Player

SL- P770

Color Area

(K) [M] ..... U.S.A.

(K) [MC] Canada.

(K) [E] ..... Continental
Europe.

(K) [EK].... United Kingdom.

(K) [XL] Australia.

(K) [EG] F.R.Germany.

(K) [EB] Belgium.

(K) [EH],... Holland.

(K) [EF] France.

(K) [Ei] ..... Italy.

(K) [XA].... Asia, Latin
America, Middle
Near East, Africa
and Oceania.

(K) [XB) . . .. Saudi Arabia.

(K) [PA] . . .. Far East PX.

(K) [PE] European Military.

(K) [PC].... European Audio
Club.

l Infrared remote control transmitter

Dimensions (WXHXD): 73 X 22 X 181 mm
(2-7/8 X 7/8" X 7-1/8)

Batteries: UM-4 AA batteries or IEC-R03
or equivalent (1.5 V X 2)
Weight: 130 9 (including batteries)
(0.28 lbs)
I General

For U.S.A. and Canada:
AC 120 V, 60 HZ
For United Kingdom and Australia:
AC 240 V, 50 Hz
For Continental Europe:
AC 220 V, 50 Hz
For Others:
AC 110N127 V/ 220N240 V,
50/60 Hz
Power consumption: 16 W
Dimensions (WXHXD): 430 X 129 X 333 mm
(16-15/16" X 5-3/32" >< 134/8")
Weight 8.1 kg
(17.9 lbs)

Power supply:

Specifications are subject to change without notice.
Weight and dimensions are approximate.
Measured by EIAJ (OP-307).

Flnllonlc MINI, Inc. Mltlushltl Electrlc Trldlng 00., Lid.
91-236. Kautli Street, Ewa Beach PO. Box 288, Central Osaka Japan
P.O. Box 774

Honolulu, Hawaii 96808-0774 Pun-mill: Tokyo OIIIEO

Mltluihlll Electric Trading C0,. Ltd.
Mltiulhlu Eiectrlc 6th Floor. World Trade Center Bldg,
0| Clnldl lelted No 4-1. HamamatsuVChu 2-Chome,
5770 Ambler Drive, M)sslssauga, MIrlato-ku, Tokyo 105, Japan
Ontario, L4W 2T3

Carolina, Puerto RICO 00630

SL-P770

I CONTENTS

Page Page
. 2 SCHEMATIC DIAGRAM ............................... 28~34
3 PRINTED CIRCUIT BOARD AND

SAFETY PRECAUTIONS ..............................
PRECAUTION OF LASER DIODE .....

BEFORE USING THIS UNIT .......... 3 CONNECTION DIAGRAM .................. ..35N38
FRONT PANEL CONTROLS AND FUNCTIONS N5 REPLACEMENT PARTS LIST (Electric parts) ..39N40
REMOTE CONTROL TRANSMITTER . 6 EXPLODED VIEWS .......................... ..41~43

6 REPLACEMENT PARTS LIST (Mechanical parts) .i
N!) REMOTE CONTROL UNIT PARTS ............
. 10 PACKING .....................................

CONNECTIONS ..
OPERATION .....
CONVENIENT FUNCTIONS ........

.45

RECORDING FROM COMPACT DISCS. . 12 RESISTORS AND CAPACITORS ................ ..47~49
HANDLING PRECAUTIONS FOR OPTICAL PICKUP .15 BLOCK DIAGRAM ............. . ,50N52
DISASSEMBLY INSTRUCTIONS. . .. .............. 16~19 TERMINAL FUNCTION OF LSI ................. ..53N57
MEASUREMENTS AND ADJUSTMEN ............... 20~26 INTERNAL CONNECTION OF FL ......................... 58

SCHEMATIC DIAGRAM OF REMOTE CONTROL UNIT .... 27

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 manufacturer's recommended components for safety.

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

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

.USSAN

o INSULATION RESISTANCE TEST

1. Unplug the power cord and short the two prongs of the plug With a )umper Wire,

2. Turn on the power switch.

3. Measure the resistance value with Ohmmeter between the )ompered AC plug and each exposed metal cabinet part, such as
screwheads antenna, control shafts, handle brackets, etc. Equipment with antenna terminals should read between 3M9
and 5.2MSZ to all exposed parts. (Fig. A) Equipment without antenna terminals should read approximately infinity to
all exposed parts. (Fig. 8)

Note: Some exposed parts may be isolated from the chasm by de5ign. These will read infinity.

Antenna
terminal \

Exposed Exposed 9
metal metal
part part
Ohmmeter Ohmmeter
(Fig-A) (Fig.8)

ReSISIance=3MQ-5.2MQ ReSIstancezApprox oo

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

Page 2

SL-P770

I PRECAUTION OF LASER DIODE

Caution: This product utilizes a laser diode.
ADVARSEL: I dette a apparat anvendes laser.

0 Use 0' caution labels Note 0 Mark I5 used, >< Mark IS not used

CLASS

l
LASER PRODUCT

Obs:

Areas SOWDAS SQWD10 SOWD7 SOWDIS
(MC) x O X X
[E] o x o o
[EKL [XL], (E6).
[E5]. [EH], [EF].
(Eli. rm [XS] 0 x O O
SQWD45

DANGER-Invisible laser
radialion when open

ADVARSE L»Usynligl
laserlys udstrales ved
sbnmg,UNDG§ Der
EKTE BESTRALING.

SOWDlO

AVOID DIRECT EX-
POSURE TO BEAM

mum.

Apparaten Innehéller laser
Komponent av noger Iaserklass
an klass l.

~CIUIIIIIIIrun-tum mu. m
murmur"; mum- mu nvtr */
"ATTIIIIIUII urn-lint" mm H

[Illlllllfllillfllli lillillllll SI WIIII'

FE

SOWDTQ

VAROlTUS! Laite sisaltaa laserdiodin.
joka lahettaa n'akymaténta silmille
vaarallista lasersateilya

I BEFORE USING THIS UNIT

1. Place a sottcloth under the unit to protect it from scratches.
2. Press the lock shaft on the bottompanel to the in (FREE)
position (1).

NOTE:

IF THE UNITIS TRANSPORTED AGAIN. PERFORM THE
FOLLOWING STEPS:

1) Remove the disc from the holder.

2) Pull the lock shaft to the out (LOCK) position (-41).
CAUTION:

Do not transport the unit without locking the lock shaft.
SEVERE DAMAGE WILL RESULT.

Lock shaft
(in the locked condition)

«@

is Push to unlock.

@

Soft cloth or similar material (to prevent scratches)

I FRONT PANEL CONTROLS AND FUNCTIONS

ol section

(D Power switch (power)

@Remote-control signal receptor
(remote sensor)

©Disc holder

@Digital output button/indicator
(digital output)
While this indicator illuminates, compact-disc sounds can
be output (as digital signals) from the digital output
terminals on the rear panel of this unit.

6) Numeric buttons (1 ~20, +10, 0)
These buttons can be used to select the track numbers and
the recording time.

@ Clear button (clear)
® Recall button (recall)
Programmed-play button (program)

© Search-speed select button (fast/slow/oft)
This button can be used to select the speed when using the
search dial to locate the beginnings of tracks.
last:
Set to this position to search at high speed. (One turn of the
dial is equivalent to about 25 seconds.)
slow:
Set to this position to search at slow speed. (One turn of the
dial is equivalent to about 1 second.)
off:
Set to this position when the search dial is not being used.

Compact-disc edit button (edit)
When compact-disc sounds are to be recorded to tape, this
button can be used to calculate the number of tracks that
can be recorded on the two sides of the tape, considering
the length of the cassette tape used, so that there is no
interruption of tracks.

® Tape-side select button (side A/B)

® Peak-level search button (peak)
This button can be used to locate the maximum signal level
(peak level) lor the signals on the disc. This is a convenient
feature that helps when adjusting the recording level when
compact-disc sounds are to be recorded to tape.

@A-B peak-level search button (A-B)
Search dial (search dial)
@ Automatic play stand-by button (auto cue)

@ Music scan button (music scan)

This button can be used to play the first part 01 each track in
order.

® Random-play button (random)
This button can be used to select "random play (the unit's
microcomputer selects the sequence of track play in a
random order).

Repeat button (repeat)

Time-display select button (time mode)

® A-B repeat button (A-B repeat)

@ Display-mode select button (display mode)
This button can be used to select, each time it is pressed,
either the display of the play position of the disc, or the
display at the output level, by the indicator.

® Play button/indicator (play/>)

® Pause button/indicator (pause/I l)

® Stop button (stop/l)
This button can be used to stop the disc play, as well as to
cancel the various play modes.

@ Skip buttons (l« skip/skip >H)