Contents
US Model
MZ-R900
PORTABLE MINIDISC RECORDER
Canadian Model
6.DIAGRAMS
TABLE OF CONTENTS
3.DISASSEMBLY
MZ-R900
MZ-R900 SECTION SERVICING NOTES
Notes on chip component replacement
Flexible Circuit Board Repairing
NOTES ON LASER DIODE EMISSION CHECK
MZ-R900 SECTION GENERAL
The headphones/earphones with a remote control
The display window of the remote control
Looking at controls
3-1.DISASSEMBLY FLOW
MZ-R900 SECTION DISASSEMBLY
3-2.PANEL ASSY, BOTTOM
3-3.PANEL ASSY, UPPER SECTION
MZ-R900
3-4.“LCD MODULE”, “PANEL ASSY, UPPER”
MZ-R900
3-6.“CASE ASSY, BATTERY”, “MAIN BOARD”
2 case assy, battery 3 main board
3-5.MAIN BOARD ASSY
5 Remove the “strip, ornamental” B
MZ-R900
3-7.STRIP, ORNAMENTAL
in the direction of arrow C
3-9.SERVICE ASSY, OP LCX-4R
MZ-R900
3-10.HOLDER ASSY
MZ-R900
3-11.MOTOR FLEXIBLE BOARD
MZ-R900
3-12.MOTOR, DC SLED M602
MZ-R900 SECTION TEST MODE
Setting Method of Test Mode
Operation in Setting the Test Mode
Outline
Overall Adjustment Mode
Servo Adjustment
Audio Adjustment
Major item switching
011C 6 8 S
011 0 5 9 A
011 L r e f P w
011O F F J
Setting method of Reset the Error Display Code
Reset the error display code
Description of Error Indication Codes
MZ-R900
000P * * R
Setting method of NV reset
021Reset
MZ-R900 SECTION ELECTRICAL ADJUSTMENTS
Change of Adjusted Values
Adjustment method of Vc PWM Duty H item number
Adjustment sequence
Adjustment method of Vc PWM Duty L item number
Adjustment method of Vl PWM Duty item number
Adjustment Method of temperature correction
Temperature Correction
Laser Power Check
000 ADJ OK
Electrical Offset Adjusting Method
Configuration of overall adjustment
Overall Adjustment Mode Title Display
MZ-R900
XXXCD RUN
Overall CD and MO adjustment items
000 Assy11
000 *** NG
043 Resume CC
0230D6000
0230D5DAA
0230D6909
0230D751C
SECTION
DIAGRAMS
SIGNAL PATH
MZ-R900
PLAYBACK
• SIGNAL PATH
MZ-R900
REC ANALOG IN
Page
MZ-R900
Waveforms
MZ-R900
MZ-R900
3131
IC301
IC Block Diagrams
MZ-R900
AK4562VNS-L
IC601
IC551
SC111257FCR2
XPC18A22FCR2
Pin No
MZ-R900
6-6.IC PIN FUNCTION DESCRIPTION
Pin Name
MZ-R900
PAUSE KEY
Focus error signal input from RF amp IC501
MZ-R900
MZ-R900
DSPVDD2
MZ-R900
156
MZ-R900
XPD ADA
7-1.PANEL SECTION 2
SECTION EXPLODED VIEWS
MZ-R900
1 9 2 7 8 2 2 6
MZ-R900
7-2.CHASSIS SECTION
MZ-R900
7-3.MD MECHANISM DECK SECTION MT-MZR900-171
SECTION
ELECTRICAL PARTS LIST
MZ-R900
MAIN
MAIN
MZ-R900
Ref. No
MZ-R900 MAIN
MAIN
MZ-R900
Ref. No
MZ-R900
Ref. No
MEMO
MZ-R900
Date
REVISION HISTORY
MZ-R900
Description of Revision