SERVICE MANUAL
DA
TA
BASIC MD MECHANISM : MT-MZR900-171
MINIDISC RECORDER
AM-F90
S/M Code No. 09-01A-355-4N2
AHK1 (S)
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TABLE OF CONTENTS
SPECIFICATIONS .............................................................................................................................................. 3
ACCESSORIES/PACKAGE LIST-1/1 ................................................................................................................. 4
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING ............................................................ 5
Optical Pickup Block and Base Unit Handling Precautions ................................................................................. 6
Service Note ........................................................................................................................................................ 7
DISASSEMBLY INSTRUCTIONS .................................................................................................................. 8-13
ELECTRICAL MAIN PARTS LIST ............................................................................................................... 14-17
BLOCK DIAGRAM-1/3 (SERVO) ...................................................................................................................... 18
BLOCK DIAGRAM-2/3 (AUDIO) ....................................................................................................................... 19
BLOCK DIAGRAM-3/3 (DISPLAY/KEY CONTROL/POWER) .......................................................................... 20
WIRING-1/1 ....................................................................................................................................................... 21
SCHEMATIC DIAGRAM-1/1 ............................................................................................................................. 22
WAVE FORM ............................................................................................................................................... 23-25
TEST MODE ................................................................................................................................................ 26-31
ELECTRICAL ADJUSTMENT ...................................................................................................................... 32-42
IC BLOCK DIAGRAM ................................................................................................................................... 43-45
IC DESCRIPTION-1/2 (CXA1782BQ)-1/1 ......................................................................................................... 46
IC DESCRIPTION-2/2 (CXD2671-203GACXD2671-203 GA) ..................................................................... 47-52
MECHANICAL EXPLODED VIEW-1/3 (MAIN UNIT) ........................................................................................53
MECHANICAL EXPLODED VIEW-2/3 (MAIN C.B BLOCK) ............................................................................. 54
MECHANICAL EXPLODED VIEW-3/3 (MD MECHANISM DECK) ................................................................... 55
MECHANICAL PARTS LIST-1/1 ................................................................................................................. 56, 57
APPENDIX1/1 ................................................................................................................................................... 58
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SPECIFICATIONS
· Design and specifications are subject to change without
notice.
· Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories
Licensing Corporation. HX Pro originated by Bang &
Olufsen.
"DOLBY", the double-D symbol
and "HX PRO" are
trademarks of Dolby Laboratories Licensing Corporation.
Laboratories Licensing Corporation.
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REF. NO
PART NO.
KANRI
DESCRIPTION
NO.
ACCESSORIES/PACKAGE LIST-1/1
1
8B-HM1-902-010
IB,HK(ECH)
2
8B-HM1-951-010
RC UNIT,RC-F90
3
87-B30-138-010
MIC,CM-MS001
4
87-B30-491-010
HEADPHONE,HP-M041(S) S-G
5
91-251-895-110
CASE,BAT UM-3
!
6
91-EM0-003-110
AC ADAPTOR,AMF90EX
7
91-756-120-110
BAT,NH-14WM(A)
8
93-043-060-010
CASE,BAT
9
93-220-749-010
CARRYNG,CASE
10
9X-337-932-120
CASE ASSY,BAT
11
91-EM0-007-110
OPTICAL CABLE
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PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
VAROITUS!
Laiteen Käyttäminen muulla kuin tässä käyttöohjeessa mainit-
ulla tavalla saattaa altistaa käyt-täjän turvallisuusluokan 1 ylit-
tävälle näkymättömälle lasersäteilylle.
VARNING!
Om apparaten används på annat sätt än vad som specificeras i
denna bruksanvising, kan användaren utsättas för osynling
laserstrålning, som överskrider gränsen för laserklass 1.
Caution: Invisible laser radiation when
open and interlocks defeated avoid expo-
sure to beam.
Advarsel:Usynling laserståling ved åbning,
når sikkerhedsafbrydere er ude af funktion.
Undgå udsættelse for stråling.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
ATTENTION
L'utilisation de commandes, réglages ou procédures autres que
ceux spécifiés peut entraîner une dangereuse exposition aux
radiations.
ADVARSEL!
Usynlig laserståling ved åbning, når sikkerhedsafbrydereer ude
af funktion. Undgå udsættelse for stråling.
This Compact Disc player is classified as a CLASS 1 LASER
product.
The CLASS 1 LASER PRODUCT label is located on the rear
exterior.
This set employs laser. Therefore, be sure to follow carefully the
instructions below when servicing.
WARNING!
WHEN SERVICING, DO NOT APPROACH THE LASER EXIT
WITH THE EYE TOO CLOSELY. IN CASE IT IS NECESSARY TO
CONFIRM LASER BEAM EMISSION. BE SURE TO OBSERVE
FROM A DISTANCE OF MORE THAN 30cm FROM THE
SURFACE OF THE OBJECTIVE LENS ON THE OPTICAL
PICK-UP BLOCK.
CLASS 1
KLASSE 1
LUOKAN 1
KLASS 1
LASER PRODUCT
LASER PRODUKT
LASER LAITE
LASER APPARAT