Technics SJHDA 710 Service Manual

Page 1

ORDER NO ADDOOSt 10028

Service Manual

Mini Disc Deck
SJ-HDA71O

Mechanism unit: MRSA Mechanism

Series

Colour

(N) ................ Gold Type
Areas

EG ................... Europe.

EB .................. Great Britain.

This product is option for systems at SC-HDA710

Specifications
.System Minidisc digital audio system
Recording Magnetic field modulation direct overwrite OOutput
Reading Nonrcontacl optical system With Analog output
Semiconductor laser (=780nm) (Level/impedance): 2 OV/GOOQ
Sampling frequency: 44.1 kHz
Cording system: ATRAC .General
Channel: 2channeli slereo Dimensions (WxHxD): 196x1058x243mm
Frequency response: 10-20000Hz (tOOdB) Weight: 1 8kg
SIN Ratio (PLAY): 9W3 Power supply: AC230-240V, 50Hz
Dynamic range (PLAY): 90dB Power consumption: 12W(at STANDBY condition:2.0W)
Wow and flutter: Below measurable limit
Notes:
.Input 1.Design and specifications are subiect to change without notice.
Analog "9? 2.Dimensions and weight are approximate
' fl 2
(Levellimpe ance) 500mV/47kn 3.Tota| harmonic distortion iS measured by the digital spectrum
Digitat input (Optical in 1, analyzer
Optical in 2)
i th:
Wave eng 660nm

A WARNING

This service intormation is designed for experienced repair technicians only and is not designed for use by the general public.

it does not contain warnings or cautions to advise non«technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this sen/ice information by anyone else could result in serious injury or death,

r 2000 Matsushita Electric industrial Co.. Ltd. A!'

9 ®
rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

CONTENTS

1 Accessories

2 Precaution of Laser Diode . 3
3 Caution for AC Main Lead -------------------------------------------------------- 4
4 Loganon of Controls ...................................................
5 Handling Precautions for Traverse Deck (MD Unit)--------------- 6
51. Handling of MD Unit (optical pickup) . ... ~
5.2. Grounding for electrostatic breakdown prevention ------------ 6

6 Operation Checks and Component Replacement Procedures?
6.1. Checking for the main P.C.B.
6.2. Checking for the MD servo PCB.-
6.3. Checking for the operation PCB. 8

8.4. Replacement for the magnetic head and optical pickup , B
6.5. Replacement tor the belt and loading motor a-r. ' y ------ 11

6.6. Replacement tor the traverse m - : :s; ' y rrrrrrrrrrr ~ 12
7 Self-Diagnostic Function ----- ...13
7.1. Switching to the Sell-Diagnostic Mode ---------------------------- 13

7.2. Canceling the Self-Diagnostic Mode -

7.5. Clearing the Self-Diagnostic Mode
8 Self Check Function

8.1. Setting to the Sell Check Function . ~ . . . ~ ~ 14
8,2, Checking the operation switches------------------»---------~-- 14
8.3. Checking the FL display »- ~ ~~~ . ... 14

9 Measurements and Adjustments (Laser Power Adjustment) -15
9.1. Necessary Instruments ------------------------------------------------- 15

1 Accessories

- AC power supply cord... .1pc.

For (EB) area:
(RJAoo44-sc)

For (EG) area:
(RJAOOdS-tC)

9.2 Set the Unit to the Adjustment Mode
9.3. Adjustment Procedure

10 Troubleshooting Guide ------------------------------------------------------------ 1'
11 Schematic Diagram Notes . ~ . ~ ~ ~ ~ ~ ~ ~ ~ . 2:
11.1. Schemtic Diagram Notes ---------------------------------------------- 2:
11.2 Type Illustration of lCIS, Transistors and Diodes-~ -» . . 2
12 Schematic Diagram ................................................................ 21

13 Printed Circuit Board-
14 Block Diagram

15 Wiring Connection Diagram

16 Terminal Function of lCIs ------------------------------------------------------- 41
16.1 |C1 (AN8772FHO) RF AMP ~ ~ ~ ~ ~ ~ ~ ~ . 41
16.2 ICZ (AN881dsB-E1) : FOCUS/TRACKING COlL,

SF'lNDLE/TFlAVERSE MOTOR DRIVE . . ~~ 41
16.3 103(M6616RA1) . ATRAC ENCORDEFl/DECORDER.
SERVO SIGNAL PROCESSOR ------------------------------------- an

16.4 lC10 (MN101DOSDAA) : SYSTEM CONTROL-
165. iC72 (MNV4400-T8T) 1 4M DRAM '-
16.6. lC901 (M30218MAA204). FL DRIVE/SYSTEM CONTROL

. 4:
17 Replacement Parts List 5|
18 Cabinet Parts Location ''''''' . ~ ~ 51
19 MD Mechanism Parts Location----*---------*---"---'----------------"--'--Si
2° packaging ............................................................................... 5-

- Stereo phono cables ............. 2pcs.
(FlJL2POO4E108A)

~ Optical cable ............... 1 pc.
(RJL1X001805)
' Flemote control batteries ............... 2pcs.

[Rs/Lne (AA, UM-E) l
Note:These are available on sales route.

- Remote control transmitter ............. 1pc.
(EUR645274)

Page 23

11 Schematic Diagram Notes

11.1. Schemtic Diagram Notes
This schematic diagram may be modified at any time with the
development of new technology
Notes:
- S1 ' PROTECT det. swnch.
- S2 : REFLECT det. switch.
-SS ' LOAD OPEN det. swttoh.
~ 84 : DISC IN det. switch.
- 85 : LOAD PLAY/REC det. switch.
- $6 : LOAD PLAY det. switch
- S7 : LOAD TRG det. switch.
- 88 : Traverse det. swrtch.
. 8901 . Standby/on ( il )switch.
- $902 '. Input selector (INPUT SELECTOR) switch.

egos : skip/Search ( K4 /<4 REC LEVEL -)
Switch

8904 : Skip/Search ( bb/ )H REC LEVEL +)
Swttch

-ssos : Edit (EDIT) switch.
- $906 1 Enter (ENTER) switch.

- 8907 : Pause ( II )switch.

- 8908 : (DISPLAY) switch.

- $909 : Eject ( A EJECT) switch.

- 8910 : Stop ( I )swtch.

- $911 : Playback/Recording start ( ) ) switch.
- 5912 : Record( . REC) switch.

- VR1. Laser power adi V.R.

- Indicated voltage values are the standard values for the
unit measured by the DC electronic circwt tester (high-
impedance) with the chassis taken as standard,

23

Therefore. there may exist some errors in the voltage
values, depending on the internal impedance of the DC
circuit tester

No mark: MD STOP

( ): MD play [1kHz, L+R, DdB]

<>: MD rec. [1kHz, L+R, OdB]

Important safety notice:
Components identified by A mark have spectal
characteristics important for safety
Furthermore, special parts which have purpose of fire-
retardant (resistors), high»quality sound (capacitors),
lowinolse (resistors), etc. are used. When replacing any
of components, be sure to use only manufactures
specified parts shown in the pans list.

Cautionl

IC and LSI are sensitive to static electricity.

Secondary trouble can be prevented by taking care
during repair.

Cover the parts boxes made of plastics with aluminum
foil.

Ground the soldering iron.
Put a conductive mat on the work table.

Do not touch the legs of IC or LSI with the fingers
directly.

Voltage and signal lines

Positive voltage line
: Negative voltage line
: Playback signal line
: Recording Signal line

Illil

Page 56

19 MD Mechanism Parts Location

Note' When changing loading mechanism
pans. apply the specified grease to
the areas marked " xx "as shown in
the drawing.

Rsfno. 'Part No.
. o NRFKXPGBAU

* Lia-102

1104

l _ ' r l 1 MEN
x
1 \ggg f _

4

Note: We do not supply those Items of pans marked *.

56

Page 57

SJ-HDW II)

20 Packaging

;.
Remotecomrol Dana (,5 [R6/LH6(AA,UM-3)3 A1VA1-1
NowThese are avatlabe on sales mule.

-P2

57 Printed in Germany

Page 59

ORDER NOADOOOSHOCQS

Service Manual

Service Schematics

This publication consists of schematics for product
identified in the schematics. It is not intended as a
substitute for a service manual, which is available from
MATSUSHITA in CD or print format. For proper repair
instructions it is neccessary to consult the CD or print
version of the full service manual.

Specifications

.System
Recording
Reading

Sampling lrequency:
Cording system:
Channel:

Frequency response:
SIN Ratio (PLAY):

Dynamic range (PLAY):

Wow and flutter:

.lnput

Analog input
(Level/impedance):

Digital input (Optical in 1,

Optical in 2)
Wavelength:

Minidisc digital audio system
Magnetic iield modulation direct overwrite

Non-contact optical system with
Semiconductor laser (=780nm)

44.1 kHz
ATRAC

Zchannel, stereo
10-20000Hz (10.3dB)
91dB

90dB

Below measurable limit

SOOmV/47k57.

660nm

Mini Disc Deck
SJ-HDA710

Mechanism unit: MR3A Mechanism
Series

Colour

(N) ................... Gold Type

Areas

EG ................... Europe.

EB ................... Great Britain.

This product is option for systems of SC-HDA710.

.0utput
Analog output

(Levelfimpedance): 2.0V/600§1

.General
Dimension 5 (Wx H xD):

Weig ht:

196x105.8x243mm

1.8kg

A02307240V, SOHZ

12W(at STANDBY condition:2.0W)

Power supply:
Power consumption:

Notes:
1.De5Ign and specifications are subject to change Without notice.
2 Dimensions and weight are approximate.

2,Tota| harmonic distortion is measured by the digital spectrum
analyzer.

& WARNING

This service information is de5igned for experienced repair technicians only and is not designed for use by the general public.

it does not contain warnings or cautions to advise non-technical individuals at potential dangers in attempting to sen/ice a product
Products powered by electricity should be servtced or repaired only by experienced protesssonal techmcrans. Any attempt to sen/ice
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Technics®

© 2000 Matsushita Electric tndustrial (30.. Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.