Summary of the content on the page No. 1
MZ-R90/R91
SERVICE MANUAL US Model
Canadian Model
Ver 1.4 2001.01
Australian Model
With SUPPLEMENT-1
Chinese Model
(9-927-187-83)
MZ-R90
AEP Model
UK Model
E Model
Tourist Model
MZ-R90/R91
Photo: MZ-R91 (Blue type)
Model Name Using Similar Mechanism NEW
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
Mechanism Type MT-MZR90-165
Optical Pick-up Name LCX-2R
SPECIFICATIONS
1)
System LINE OUT: 194 mV, load impedance 10 The battery life may be shorter due to
kilohm ope
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TABLE OF CONTENTS Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270 ˚C dur- ing repairing. 1. SERVICING NOTES ............................................... 3 • Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). 2. GENERAL ................................................................... 4 • Be careful not to apply force on the conductor when soldering or unsoldering. 3. DISASSEMBLY ...........................
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SECTION 1 SERVICING NOTES • When repairing this device with the power on, if you remove NOTES ON HANDLING THE OPTICAL PICK-UP the MAIN board or open the upper panel assy, this device stops BLOCK OR BASE UNIT working. The laser diode in the optical pick-up block may suffer electro- In this case, you can work without the device stopping by fas- static break-down because of the potential difference generated tening the hook of the open/close detect switch (S801) with tape. by the charged
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SECTION 2 This section is extracted from instruction manual. GENERAL • LOCATION OF CONTROLS – The recorder – 1 x (stop) /CHARGE button 0 2 Display window 1 3 REC indicator qa 4 DC IN 3V jack 2 5 Jog lever qs 6 i/LINE OUT (headphones/line out) jack 3 7 MIC (PLUG IN POWER) jack qd 8 LINE IN (OPTICAL) jack 4 9 HOLD switch qf Slide to lock the controls of the recorder. 5 0 N (play) button qg qa X (pause) button 6 qs T MARK (track mark) button qh qd REC (record) switch 7 qf Battery compartment qj
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SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. Main Board, “Case Assy, Battery” Set Panel Assy, Bottom Upper Panel Section LCD Module, “Button, Control”, “Service Assy, Upper Panel” (R90/R91) “Chassis Assy, Set”, Belt Assy, Ornamental Main Board, “Case Assy, Battery” MD Mechanism Deck (MT-MZR90-165) Service Assy, OP Holder Assy Motor Flexible Board Motor, DC (Sled) (M602) “Motor, DC SSM-01C14A (Spindle) (M601)”, “Motor, DC (Over Write Head Up/Down) (M603)” Note:
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LCD MODULE, “BUTTON, CONTROL”, “SERVICE ASSY, UPPER PANEL” • MZ-R90 1 five screws (1.4) 2 LCD module 3 control button 4 upper panel service assy • MZ-R91 1 five tapping screws (1.7) 2 LCD module 3 control button Note: The control buttons are stuck with strong adhesive sheets. As the control buttons are very fragile, do not peel them off forcibly. 5 upper panel service assy 4 adhesive sheet (control button) Note: Also replace the adhesive sheets (control button), when replacing the control
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MAIN BOARD, “CASE ASSY, BATTERY” 2 flexible board (LCD module) (CN801) 2 flexible board (over write head) (CN601) 1 Remove the solder of joint. 3 four toothed lock screws (M1.4) 1 Remove the solder of 4 battery terminal (minus). 6 main board 8 batter case assy 1 Remove the solder of 2 motor flexible board battery terminal (plus). (CN602) 5 flexible board (optical pick-up) (CN501) Note: Before removing the flexible board from CN501, be sure to solder the flexible board. (Refer to servicing
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“CHASSIS ASSY, SET”, MD MECHANISM DECK (MT-MZR90-165) 3 MD mechanism deck 2 boss (MT-MZR90-165) 2 boss 4 tension spring (arm) 1 screw (1.4) 5 set chassis assy 1 screw (1.4) SERVICE ASSY, OP 1 washer (0.8 - 2.5) 2 gear (SA) 3 precision pan screw (M1.4) 7 Pull off the lead screw. 5 screw 4 rack spring 5 screw 6 8 bearing 9 Opening the over write head toward the direction A, remove the OP Service assy toward the direction B. B Note: Do not open the entire assy forcibly, when opening the
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HOLDER ASSY 5 Remove the holder assy in the direction of arrow C. B 1 Open the holder assy. 2 Push the convex portion toward the direction B and A open the holder assy toward the direction A to erect uprightly. 3 C 4 boss MOTOR FLEXIBLE BOARD 1 Remove four solders of DC motor (sled) (M602). 1 Remove two solders of DC motor (over write head up/down) (M603). 1 Remove four solders of 2 adhesive sheet DC motor (spindle) (M601). Note: Align a circular hole in the stripping paper with a circu
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MOTOR, DC (SLED) (M602) 1 Remove four solders of motor flexible board. 2 washer (0.8 - 2.5) 4 two precision pan screws (M1.4) 3 gear (SA) 5 DC motor (sled) (M602) “MOTOR, DC SSM-01C14A (SPINDLE) (M601)”, “MOTOR, DC (OVER WRITE HEAD UP/DOWN) (M603)” 1 Remove six solders of motor flexible board. Note: Press-fit the gear (HA) up to the qa DC motor (over write head up/down) position of the DC motor (over write (M603) head up/down) (M603) as shown below. gear (HA) 6 two precision pan s
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SECTION 4 TEST MODE [Outline] 2 In the normal mode, turn on the HOLD switch on the set. While pressing the N key on the set, press the following set keys • This set provides the Overall adjustment mode (Assy mode) that in the following order: allows CD and MO disc to be automatically adjusted when in the test mode. In this overall adjustment mode, the protect switch >t >t .t .t >t .t is detected to judge the disc, CD or MO, and each adjustment is >t .t Xt X automatically executed in order.
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[Configuration of Test Mode] [VOL +] key:100th place of mode number increase. [Major item switching] [Test Mode $Display Check Mode%] [VOL --] key:100th place of mode number Press the > or [VOL +] key decrease. N key x key [Manual Mode] Press the x key [VOL +] key:10th place of mode number [Servo Mode] increase. [Medium item switching] [Audio Mode] [VOL --] key:10th place of mode number [Power Mode] decrease. N key x key [OP Alignment Mode] Press the . or [VOL --] key [Overall Ad
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5. The display changes a shown below each time the jog key on [Overall Adjustment Mode] the set is turned up or [DISPLAY] key on the remote com- Mode to adjust the servo automatically in all items. mander is pressed. Normally, automatic adjustment is executed in this mode at the repair. Adjust the CD first, when performing adjustment. • Configuration of overall adjustment • Address & Adjusted Value Display > key . key Title LCD display display 011 C68S01 N key adjusted value protect switch
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[Sound Skip Check Result Display Mode] 4. When [REC] key on the set is pressed, the total of error count is displayed on the LCD, and each time the > key is This set can display and check the error count occurring during pressed, the error count descents one by one as shown below. record and play. Also, when . key is pressed, the error count ascends by one. If N key is pressed, the error count during play is dis- • Setting method of Sound Skip Check Result Display played. Mode 1. Setting the tes
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[Self-Diagnosis Display Mode] • This set uses the self-diagnosis system in which if an error oc- curs in recording/playback mode, the error is detected by the model control and power control blocks of the microprocessor and information on the cause is stored as history in EEPROM. By viewing this history in test mode, it helps you to analyze a fault and determine its location. Total recording time has been recorded as optical pick-up using time, and it is compared with the total recording time in
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• Description of Indication History History code number Description 1st0 The first error 1st1 Total recording time when 1st0 was generated (Higher rank byte) 1st2 Total recording time when 1st0 was generated (Lower rank byte) N 0 The last error N 1 Total recording time when N 0 was generated (Higher rank byte) N 2 Total recording time when N 0 was generated (Lower rank byte) N-10 One error before the last. N-11 Total recording time when N-10 was generated (Higher rank byte) N-12 Total recording
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[Key Check Mode] This set can check if the set and remote commander function nor- mally. • Setting Method of Key Check Mode 1. Setting the test mode. (See page 11) 2. Press the [T MARK] or [DISPLAY] key on the remote com- mander for several seconds activates the key check mode where all segments of LCD turn OFF. (At the last two digits of DOT section, AD value of remote commander key line is displayed in hexadecimal) 3. When each key is pressed, it is displayed on the LCD, imply- ing that it was
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Ver 1.4 2001. 01 SECTION 5 ELECTRICAL ADJUSTMENTS [Outline] [NV Reset] • In this set, automatic adjustment of CD and MO can be per- • Setting method of NV reset formed by entering the test mode. (See page 11) 1. Select the manual mode of test mode, and set mode num- However, before starting automatic adjustment, the memory ber 021NV Reset. clear, power adjustment and temperature adjustment must be LCD display performed in the manual mode. • The keys in the description refer to the keys on bot
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• Adjustment method of VC PWM Duty (L) • Adjustment method of VC PWM Duty (H) (mode number: 762) (mode number: 765) 1. Select the manual mode of the test mode, and set the mode 1. Select the manual mode of the test mode, and set the mode number 762. (See page 12) number 765. (See page 12) LCD display LCD display 762 765 VclPWM VchPWM 2. Connect a digital voltmeter to the TP915 (VC) on the MAIN 2. Connect a digital voltmeter to the TP915 (VC) on the MAIN board, and adjust [VOL +] key (voltage up)
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[Temperature Correction] • CD Automatic Adjustment item • Adjustment Method of temperature correction Mode No. Description 1. Select the manual mode of test mode, and set the mode num- 312 ber 014. (See page 12) 313 CD electrical offset adjustment LCD display 314 014 328 CD TWPP gain adjustment SetTmp 321 CD tracking error gain adjustment 323 CD tracking error offset adjustment 2. Measure the ambient temperature. 332 3. Adjust with [VOL +], [VOL --] key so that the adjusted value 336 CD ABCD lev
