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MZ-R500/R500PC
SERVICE MANUAL US Model
Canadian Model
V Ver 1.0 2001. 01 er 1.0 2001. 06
MZ-R500/R500PC
AEP Model
This service manual contains the
UK Model
information on the MZ-R500
(9-873-054-11).
E Model
Chinese Model
MZ-R500
Photo: MZ-R500
Model Name Using Similar Mechanism NEW
US and foreign patents licensed from Dolby
Laboratories Licensing Corporation.
Mechanism Type MT-MZR500-172
Optical Pick-up Name LCX-4R
SPECIFICATIONS
System Modulation system General
Audio playing system EFM (Eigh
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MZ-R500/R500PC Battery operation time Flexible Circuit Board Repairing 1) 2) Battery life (Unit: approx.hours) (EIAJ ) • Keep the temperature of the soldering iron around 270°C 3) LR6 (SG) alkaline dry battery Normal LP2 LP4 during repairing. 4) Recording 7.5 10 13.5 • Do not touch the soldering iron on the same conductor of the Playback 36 42 48 circuit board (within 3 times). • Be careful not to apply force on the conductor when soldering 1) The battery life may be shorter due to operating con
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MZ-R500/R500PC TABLE OF CONTENTS 1. SERVICING NOTE ......................................................... 4 5. ELECTRICAL ADJUSTMENTS 5-1. Outline ............................................................................... 18 5-2. Precautions for Adjustment ............................................... 18 2. GENERAL 5-3. Adjustment Sequence ........................................................ 18 Looking at the Controls ...................................................... 5
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MZ-R500/R500PC SECTION 1 SERVICING NOTE • In performing the repair with the power supplied to the set, NOTES ON HANDLING THE OPTICAL PICK-UP removing the MAIN board causes the set to be disabled. BLOCK OR BASE UNIT In such a case, fix a convex part of the open/close detect switch The laser diode in the optical pick-up block may suffer electro- (S806 on MAIN board) with a tape in advance. static break-down because of the potential difference generated Handle the FLEXIBLE board (overwrite
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MZ-R500/R500PC SECTION 2 This section is extracted from GENERAL instruction manual. 5
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MZ-R500/R500PC 6
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MZ-R500/R500PC SECTION 3 DISASSEMBLY Note : This set can be disassemble according to the following sequence. Set Case (Lower) Assy Case (Upper) Assy LCD Module Main Board MD Mechanism Deck Service Assy, OP Holder Assy Motor Flexible Board Motor, DC (M602) "Motor, DC (M601)"," Motor, DC (M603)" Note : Follow the disassembly procedure in the numerical order given. 3-1. CASE (LOWER) ASSY 4 claw 3 screws (1.7), MI 1 screw (1.7), MI knob (hold) 5 6 case(lower) assy 2 screw (1.7), MI 3-2. CASE (UPPER)
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MZ-R500/R500PC 3-3. LCD MODULE 2 screws (1.7x3), tapping 1 screws (1.7x3), tapping 4 LCD module 3 case (upper) assy 3-4. MAIN BOARD 4 screws (M1.4x2), toothed lock 2 Remove the solders 3 screws (M1.4x2), 7 CN501 toothed lock qa Remove the solder 1 CN701 6 8 MAIN board qs terminal (-), battery 5 screw (M1.4x2), toothed lock 9 Remove the solder 0 terminal (+), battery 8
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MZ-R500/R500PC 3-5. MD MECHANISM DECK 3 MD mechanism deck boss 2 chassis assy, set 1 screws (1.7), MI 3-6. SERVICE ASSY, OP 1 washer (0.8 - 2.5) 5 precision pan screw 3 precision pan screw 2 gear (SA) (M1.4) (M1.4) 6 spring, thrust detent 4 rack spring (S) 8 Pull off the lead screw. 7 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 over write head. over write head section
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MZ-R500/R500PC 3-7. HOLDER ASSY 4 Remove the holder assy to direction of the arrow B. 1 Open the holder assy. A 2 B 3 boss 3-8. MOTOR FLEXIBLE BOARD 1 Remove four solders of 5 motor flexible board DC motor (sled) (M602). 2 Remove two solders of DC motor (over write head up/down) (M603). 3 Remove four solders of 4 adhesive sheet DC motor (spindle) (M601). Note: Align a circular hole in the stripping paper with a circular hole in the DC motor (sled), when mounting the motor flexible board. 10
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MZ-R500/R500PC 3-9. MOTOR, DC (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) 3-10. “MOTOR, DC (M601)”, “MOTOR, DC (M603)” Note: Press-fit the gear (HA) up to the 1 Remove six solders of qs DC motor (over write head up/down) position of the DC motor (over write motor flexible board. (M603) head up/down) (M603) as shown below. gear (HA) 6 two precision pan screws (M1.4) 2.65 mm 4 three precision
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MZ-R500/R500PC SECTION 4 TEST MODE 4-1. Outline 4-3. Operation in Setting the Test Mode • This set provides the Overall adjustment mode that allows CD • When the test mode becomes active, first the display check mode and MO discs to be automatically adjusted when in the test mode. is selected. In this overall adjustment mode, the disc is discriminate between • Other mode can be selected from the display check mode. CD and MO, and each adjustment is automatically executed in • When the test mod
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MZ-R500/R500PC 4-5. Configuration of Test Mode + VOL key: 100th Place of item number increase. Major item switching Test mode (Display Check Mode) VOL – key: 100th Place of item number + Press the > or VOL key decrease. N key x key Manual Mode Press the x key Servo Adjustment + VOL key: 10th Place of item number increase. Audio Adjustment Medium item switching Power Supply Adjustment VOL – key: 10th Place of it
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MZ-R500/R500PC 5. The display changes a shown below each time the 4-8. Self-Diagnosis Result Display Mode [ENTER] key on the set is pressed. This set uses the self-diagnostic function system in which if an error occurred during the recording or playing, the mechanism control block and the power supply control block in the microcomputer detect it and record its cause as history in the • Address & Adjusted Value Display nonvolatile memory. This set LCD display By checking this history in the test
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MZ-R500/R500PC • Description of Error Indication Codes Problem Indication code Meaning of code Simple display Description No error 00 No error --- No error Illegal access target 01 Adrs Attempt to access an abnormal address address was specified Servo system error 02 High temperature Temp High temperature 03 Focus error Fcus Disordered focus 04 Spindle error Spdl Abnormal rotation of disc 11 TOC error TOC Faulty TOC contents TOC error 12 Data reading error Data Data could not be read at SYNC Pow
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MZ-R500/R500PC 4-10. Sound Skip Check Result Display Mode • Cause of Sound Skip Error This set can display the count of errors that occurred during the Cause of error Description of error recording/playing for checking. EIB Sound error correction error • Setting method of sound skip check result display Stat Decoder status error mode Play Adrs Address access error 1. Set the test mode (see page 12). 2. Press the N key or [T.MARK] + [PLAY] keys, and the play- BEmp Buffer is empty ing or recording
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MZ-R500/R500PC 4. When all the keys on the set and on the remote commander are considered as OK, the following displays are shown for 4 sec- onds. Example1: When the keys on the set are considered as OK: This set LCD display 888RMC OK 5. When all keys were checked or if the upper panel is opened, the key check mode quits and the test mode (display check mode) comes back. 17
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MZ-R500/R500PC SECTION 5 ELECTRICAL ADJUSTMENTS 5-1. Outline • Setting method of NV reset 1. Select the manual mode of the test mode, and set item number • In this set, automatic adjustment of CD and MO can be per- 021NV Reset (see page 13). formed by entering the test mode (see page 12). However, before starting automatic adjustment, the memory This set LCD display clear, power supply adjustment, and laser power check must be performed in the manual mode. • A key having no particular descript
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MZ-R500/R500PC 3) Press the X key to write the adjusted value. • Setting method of power supply manual adjustment 4) Select the manual mode of the test mode, and set item number 1. Make sure that the power supply voltage is 3V. 862 (see page 13). 2. Set the test mode (see page 12). 3. Press the . or [VOL--] key to activate the overall adjustment This set LCD display mode. This set LCD display 862V1dat 000Assy11 5) Adjust with the [VOL+] key (adjusted value up) or [VOL--] key (adjusted valu
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MZ-R500/R500PC 2. Connect a digital voltmeter to the TP902 (VC) on the MAIN 3. Adjust with [VOL +], [VOL --] key so that the adjusted value board, and adjust [VOL +] key (voltage up) or [VOL --] key (hexadecimal value) becomes the ambient temperature. (voltage down) so that the voltage becomes 2.75 ± 0.01 V. (Initial value: 14h = 20 °C, Adjusting range: 80h to 7fh (–128 °C to +127 °C) digital voltmeter This set LCD display MAIN board TP902(VC) TP910(GND) 014 S14 : Address 14: Adjusted value
