Technics SLP 520 Service Manual

Page 1

Service

Compact Disc Player

@figfi

DIGITAL AUDIO

Color

(K)...Black Type
(S)...Si|ver Type

\

ORDER NO. HAD861073860

Compact Disc Player

D
(\I
~ L-P520 m
D.
Color Areas -1
(K) [M] .....U.S.A. U)
(K) [MC]...Canada.
(K) (S) [E] ...... Switzerland and
Scandinavia.
(K) (S) [EK]....Uniled Kingdom.
(K) (S) [XL]....Australia.
(K) (S) [EG] ...F.R. Germany.
(K) (S) [EBI....Be!gium.
(K) (8) [EH] ...Holland.
(K) (S) France.
(K) (3) Italy.
(K) (S) [XA]....Asia, Latin America,
Middle Near East,
Africa and Oceania.
(K) (S) [XB]....Saudi Arabia.
(K) (S) [PA]....East PX.
(K) (S) [PE]....European Miliary.
(K) (S) [PC]....European Audio Club.

SPECIFICATIONS
I Audio

[*Measured by ElAJ(CP-307)]

I Infrared remote control unit

No. oi channels
Frequency response
Dynamic range

S/N ratio

Harmonic distortion
Total harmonic distortion
Channel separation
Wow and flutter
Low-pass filter
Output voltage
Output Impedance
Load impedance

l Signal Format
Sampling trequency
Correction system
D-A conversion

I Pickup

Type
Access time

Light source
Wavelength
Traverse system
Spindle system

\ Technics

2(left and right stereo)
4A20,OOD Hz i0.3 dB"
96 dB

100 118

0.0015% (1 kHz. 0 dB)
0.003% (1 kHz, 0 dB)
100 dB

Below measurable lirnit
Hight Resolution Digital Filter
2.0 v (at 0 dB)

Approx. 6000

More than 10 kt)

44.1 kHZ
Technics Super Decoding Algorithm
16-bit linear

Fine-focus, one beam

1 second

(access to the last track)
Semiconductor laser
780 nm
High-speed linear access system
Brushless DD motor

Matsushita Services Company

50 Meadowiand Parkway,

Secaucus, New Jersey 07094

0' Puerto Rico, Inc.

Ave. 65 De Inianteria, KM 9.7

Victoria Industrial Park

Panasonic sales Company,
Division at Matsushlta Electfic

Dimensions (WXDXH)
Batteries

Weight

I Headphones
Output level
Impedance

Plug

I General
Power supply

65><155><18 mm

UM-3 AA" batteries or IEC R6

or equivalent (1.5 V><2)
140 9 (including batteries)

80 mW max. (variable)
32 O
1/4 inch stereo

For USA. and Canada:

AC 120V. GOHZ

For United Kingdom and Australia:

AC 240V, 50 HZ

For Continental Europe:

AC 220 V, 50 HZ

ForOthers:

Power consumption
Dimensions (WXDXH)

Weight

Panasonic Hawaii Inc.
91-238 Kauhi St. Ewa Beach
P.0. BOX 774

Honolulu. Hawaii 938080774

Matsusnitn Electric

of Canada Limited

5770 Ambler Drive, Mississauga,
Ontario, L4W 2T3

Carolina. Puerto Rico 00630

AC 110~127 VI220~24O V, 50/60 HZ

17 W
430X2SOX87 mm

(16-15/16">(10~1/4><3-13/32")

4.3 kg (9.5 lbs.)

Matsushita Electric Trading 00., Ltd.
no. Box 238. Central Osaka Japan

Panasonic Tokyo Oiiice
Matsushita Electric Trading Co., Ltd.
6m Floor, World Trade Center Bldg.,
No. 41, Harnamarsu-cno z-cname, Minato-kul
Tokyo 105, Japan

Page 2

l Functions

When using remote control unit:

OdB display
Automatic play OAII tracks ' 'Outpui level indicator
Random access play 0 Random access to any OMusic scan indicator
track or index oProgrammed order (No.)
Program play 0Max. of 20 program selections (when recall button is pressed)
Skip play OForward and backward track skip _
nForward and backward program track skip I ImralEd remote control unit
Search play 0Forward and backward manual search
oDiaI search (2-speed) Remote control function Basic buttons: 7
Display functions OMusic Matrix (20 tracks) Program buttons: 12
OTreok number display Time mode select buttons: 1
Olndex numberdisplay Index button: 1
ITime display (min/sec.) Recall button: 1
oOverflow mark (>) Music scan button: 1
ORepeat indicator Repeatbutton: 1
OA-B repeat indicator A-Brepeat button: 1
CSearch speed indicator Digital volume attenuation buttons: 2
00utput level indicator Specifications are subject to change without notice ior
OAuto space indicator further improvement
oTime mode indicator Weight and dimensions are approximate.
l CONTENTS p...
SAFETY PRECAUTION . . ..................... 2 TROUBLESHOOTING. . . . ............
PRECAUTION OF LASER DIODE . . . . 3 RESISTORS AND CAPACITORS. . . .
BEFORE USING THIS UNIT . . . . . . . . . . . . . . ...... 3 REPLACEMENT PARTS LIST. . . ................ 24
LOCATION OF CONTROLS ..................... 4 EXPLODED VIEWS . . . . . . . . ................. 27
PLAYINGADISC.... . ..... . 6 PRINTEDCIRCUITBOARDAND
HANDLING PRECAUTIONS FOR OPTICAL PICKUP 1D WIRING CONNECTION DIAGRAM ............ 30
DISASSEMBLY INSTRUCTIONS ........... . 11 PRINTED CIRCUIT BOARDS . . 32
HOW TO REPLACE ICS (Small outline type) . . . . . . . 15 SCHEMATIC DIAGRAM . . . . 36
TERMINAL FUNCTION OF LSI .................. 16 BLOCK DIAGRAM ......... 43
PACKING....... ..... 46

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.

(fiwaA

INSULATION RESISTANCE TEST

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 thejumpered 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 5.2MS2 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 \ 1-

Exposed " Exposed ,2 9
metal metal
part part
Ohmmeter Ohmmeter
(FioA) (Fig. 8)
Resistance = 3 IMP-5.2 MQ Resistance = Approx 00

4i. 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.

_2_

Page 6

SL-P520 j

TURNTABLE HEIGHT ADJUSTMENT
1, Connect CH1 of the oscilloscope to (+) of
main P.C.B. and chassis (-).
Oscilloscope setting: VOLT
SWEEP.
INPUT... ...DC
2. Set the DC zero balance of the oscilloscope.
3. Turn the power switch 0N and play back the test
disc (SZZP1014F or SZZP1054C).
4. Turn the adjusting screw so that the center of
waveform on the oscilloscope is 0:50mV.
(Insert a flat head screwdriver from the bottom of

the set as shown.) Splndle P.C.B.
5. After the adjustment, apply screw-lock paint I

(FtZZOL01) to the adjusting screw. Screwdriver

0V

MECHANICAL ADJUSTMENT

1. Connect CH1 of the oscilloscope to (+) and
-(-) of main P.C.B.
Oscilloscope setting: VOLT.

SWEEP..
INPUT... ..

2. Turn the power switch 0N and play back the
track 9 of test disc (SZZP10560).

(If any track other than track 9 is playback, this
adjustment cannot be achieved.)

3. Shift the set as shown with it played back. (If the
set is reversely shifted, it cannot be completely
adjusted.)

4. Alternately turn the Mechanical adjusting screws
(2 pcs.) so that the vertical fluctuation of the
waveform (RF signal) on the oscilloscope is
minimized.

5. After the adjustment, apply screw-lock paint
(RZZOL01) to the adjusting screw.

Mechanical adjustment screw

_I_

Adjust so that

vertical fluctuation
unu- u l is minimied

a n... .. a

T

Printed in Japan
i 7 ' 861008000®AM

Page 16

- MN6618A (Digital Filter) .TROUBLESHOOTING
f
Pin 0 . Pln IIO - .
No. Mark Devlsion L Function No. Mark Devision Function Notes.
1 ii 22 1. Before using this unit, release the lock shaft which secures the pick-up at the bottom of the unit.
. 2. Carefully handle the compact disc because stains, dust or warping may cause generation of noise.
2 0°12 0 154)" 03'3 data 0"th 23 MCLK ' °°mmand °'°°k '"P" 3. For the voltage value and waveform. refer to the schematic diagram. (The voltage value and waveform slightly varies
3 DDt1/SCK o 16-bitparalleldataoutput/ P4 MLD l Command load Input depending on the measuring set and tester.)
L seviamuinutbitclock r 25 L 4. The possible defects are mainly shown by semiconductors. The adjacent electronlc circuits (C, R, etc.) are
l - omitted.
16-bit arellel data out utl -- ~
4 J D010ISOUT 0 Erie gulp! data p 26 HST I j Reset signal input (reset at L)
5 ED I 7 GND terminal 27 *_ -
a D09 0 16-bit paralled data 28 LFlCK I n/L signal 0 Power leCUIt check
7 - - 29 - -~ 12V (+, -) power check N0 S1, T1 04
a DOB 0 15-bit parallel data so SFT i i Serial data input clock - lG1, pin 3 voltage _is +12v '2 -> D1 ~11 defective A
l . - I02. pin 3 voltage Is - 12V ? K31. 2 Focus search signal is emitted ? N° mm defecme
9 nor 0 16-bit parallel data 31 SIN l Ser'a' data "9" (IG101, pin 35)
YES
10 - - 32 -
YES I
11 - - 33 X OUT 0 Clock output (Not used) 11.5V(+, -) power check N0 31, T1
. 0 (C4, in 1 Volta e is +11.5V? -> DS~8 defective lC102
12 D06 0 16-bit parallel data 34 X IN | Clock input (16-9344MHZ) . IC5,:ln1voltageis -11.5V ? '04, 5 Focus lens movdesgp and down NO 0105 d r t
. . for a few secon s . e at: lve
13 [305 0 16-bit parallel data 35 OSEL | ggélfifiualiflfiueusgna' lemon YES } (After power 0N, without disc) 34:: PU
14 004 o 16-bt ilel d t
I para a a 36 LDGL L channel deglitch signal 7 6V(+ __) owercheck
15 Dos/LRCK 0 15-bit parallel data/RL signal . ' . p , 0 011,12 . YES
37 RDGL Ft channel deglltch stgnal - Q11, emitter voltage is +7.6V '? *7 D11 12 }defectlve NO
16 . . _ _ ? r . - u n r, _
38 VDD l Power supply (connected to +5V) . 012' emitter voltage Is 7 6V Focus 0" slgnal '8 L (0V) ' IC101 defectlve
F 17 _ _ (IC401, pin 31)
39 0015 16-bit parallel data (MSE) YES 7
15-bit parallel data/serial output YES
18 002/ch 0 word dock 40 0014 16-bit parallel data 5V (+, -) Power Check No ,011 } N
. - lC11 pin 3 voltage is +5V ? --> defective RF signal is emitted o 0 ic1o1 .
. 41 - ' ~ ~
19 Dot 0 16 bit parallel data . |C12, pin 3 voltage ls -5V ? |C12 (Test point 301) Optical PU }de(ectlve
20 F000 16-bit parallel data (LSB) i742 D013 0 16-bit parallel data
YES
21 MDATA I Command data input i
F'- P°W°'Fh°°k N0 T1 0 Tracking servo check
0 013, emitter voltage is -32V 1 _ DQ detective
- CN1,voltage between plnsZ 013,14
_ . d8is AC4.5V? Q13 TRON si nalcheck
o AN 29 S l le at r Drive a 9 N0 .
8 0 (Sp nd M 0 ) ((0401, pin 271" play, H 7 £18: >defectlve
. . search/skip)
Pln .. . IIO Pln IIO - .
No. Mark Devislun No. Mark Davtsian Function FOCUS servo check YES
Minimum potential of lCcontrol. 13 H3- l . .
1 GND l (Inthis unit, it ls connected to Not used in this unit. Power C'mu check Tracking error signal ls emitted 2 NO iC101 }d l t'
VEE[-7.6V].) 14 H3+ I (cmoz, pin 1) -> Optical PU 9 es lve
Standard voltage of FA1, PC, CLK. _ Negative output of Hall element YES
2 Dc ' (lnthis unit, it is connected t02.5V.) 5 H2 ' islnput- J No YES
F Reset signal is H (4.9V)" .7 IC402 d te t' e
Torque commandrilter amp. input. 16 H2+ I Positive output of Hall element ls input. (IC402, pin 5) e ° W Tracking errorsignal is emitted ? "0 |C101 } defective
3 FAI I Normal rotation command '
flvi'len FAI < DCR.) Negative output of Hall element 00101. pm16) 3102
17 H1- I is input YES
. ' YES ;
4 FAQ 0 Filter am .out ut. _ _
p p 13 H1 + | Positive output 01 Hall element ls Input. Clock stgnal (4.2336 M Hz) IS NO X301 . . NO
5 D1 l Absolute value circuit input. emitted 7 V } defective Trackjump pulse is given during _ IC101 detective
19 new | 3" SW'W 0* a" 9"" (IC401, pin 64) 3301 search/skip 700101, pin 20) mm
Capacitorterminal for low pass filter (OFF when PC>DCFt)
6 LPF I of current feedback loop. YES
- 20 HB | Bias power of Hall element. YES 1
7 A1 0 _ _ _ _
21 V60 l Power Input for It: comm Focus ON signal is L (00" 7 NO_ "3101 } detective Tracking COII drive signal ls N07 0103 } defectlve
8 l A2 Drive signal output. P t I (lC401, pin 28) IC401 emitted 2 0104
ower con [0 .
9 T A3 22 PC | (Power down mode when PC> DCR) YES
Minimum potential of |C power. Clock input. . '
1o PGND 1 (In this unit, it is connected to 23 CLK I (DCR standard» operated at the Laser APC 5'9 '5 ON 7 No "3101 } defective
v'EE [-mvl). edge of rise.) (0110, collector 2.8V) 0110
Dive current detection resistor Triangular wave generation
11 OS I terminal. 24 LTC I capacitor terminal. YES
12 PVCC l Power Input for lC power. 1

719.-

_20_