Sony service manual ResNV CC, ResOK?, 021 Res, Reset, MZ-N1 Section Electrical Adjustments

Page 19

MZ-N1

SECTION 5

ELECTRICAL ADJUSTMENTS

Outline

In this set, automatic adjustment of CD and MO can be per- formed by entering the test mode.

However, before starting automatic adjustment, the memory clear, power supply adjustment, and laser power check must be performed in the manual mode.

A key having no particular description in the text, indicates a set key.

For the LCD display, the LCD on the remote commander is shown, but the contents of LCD display on the set are same.

Precautions for Adjustment

1.Adjustment must be done in the test mode only. After adjusting, release the test mode.

2.Use the following tools and measuring instruments.

• Test CD disc

TDYS-1

 

(Part No. : 4-963-646-01)

SONY MO disc available on the market

Digital voltmeter

• Laser power meter LPM-8001

(Part No. : J-2501-046-A)

• Thermometer (using the Temperature Correction)

3.Unless specified otherwise, supply DC 3V from the DC IN 3V jack (J601).

4.Switch position

HOLD switch ............................................... ON

Adjustment Sequence

1.

NV Reset (EEPROM clear)

 

Manual Mode

 

r

 

 

2.

Power Supply Manual Adjustment

 

Manual Mode

 

r

 

 

3.

Temperature Correction (item number: 015)

 

 

r

 

 

Manual Mode

4.

Laser Power Check

 

 

r

 

 

 

 

5.

Electrical Offset Adjustment

 

Caution: This adjustment must be made with

 

 

 

no disc loaded.

 

 

r

Overall Mode

6.

CD Overall Adjustment

 

 

 

r

 

 

 

7.

MO Overall Adjustment

 

 

 

 

r

Manual Mode

 

8.

RESUME Clear

 

Note: If the version of the microcomputer is 1.000 or later, “3. Tempera- ture Correction” and “2. Power Supply Manual Adjustment” can be performed continuously in reverse order with pressing the [PLAY MODE] key on the remote commander in the overall adjustment mode.

NV Reset

Caution: The shipment data will be cleared when the NV is reset. Therefore, change the NV adjusted values following the Change of NV Adjusted Values immediately after the NV was reset.

Change the NV adjustment values according to the mi- crocomputer version.

• Setting method of NV reset

1.Select the manual mode of the test mode, and set item number 021 NV Reset (see page 14).

Remote commander LCD display

021 ResNV CC

2. Press the X key.

Remote commander LCD display

021ResOK?

3.Press the X key once more.

Remote commander LCD display

021Res***

NV reset (after several seconds)

021Reset!

4.Press the x/CHG key to quit the manual mode, and return the test mode (display check mode).

Change of NV adjusted values (version 1.000)

Caution: Change the NV adjustment values according to the mi- crocomputer version.

In this set, some adjusted values were set in the manual mode at the shipment, but these will be cleared when the NV is reset. There- fore, modify the NV adjusted values through the following proce- dure immediately after the NV was reset.

1.Item numbers in which the NV adjusted values are to be modi- fied

Change ABCD gain [Hpit] initial value (item number 336) Caution: The ABCD gain [Hpit] initial value must be changed before the overall adjustment.

Change DFTC threshold value (item number 151)

Turn off sound generation speed-up (item numbers 861 to 864)

Change CLV drive voltage limiter (item numbers 865, 866)

Change x2 CLV speed gain, +6dB compared to conventional (item numbers 867, 868)

Change x2 CLV phase gain, +3dB compared to conventional (item numbers 871, 872)

Change x2/x1 switching temperature threshold value (+10° C t +5° C) (item numbers 873, 874)

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Contents MZ-N1 SpecificationsMZ-N1 Battery lifeFlexible Circuit Board Repairing Table of ContentsDisassembly DiagramsServicing Notes SectionRecorder Section GeneralDisassembly Flow MZ-N1 Section DisassemblyUpper Panel Section Bottom Panel AssyMain Board Section LCD MODULE, Upper Panel AssyMD Mechanism Deck MT-MZN1-171, Chassis Assy Battery Case ASSY, Main BoardGear SA Screw M1.4 OP Service Assy LCX-5RDC Motor Sled M602 Holder AssyOver write head up/down Releasing the Test Mode MZ-N1 Section Test ModeSetting Method of Test Mode Operation in Setting the Test ModeA n u a l Configuration of Test ModeManual Mode Transition method in manual mode011 0 5 9 a 0 011 C 6 8 S 0F F J 0 011 0 6 3 B 0Description of indication history Reset the Error Display CodeDescription of error indication codes Setting method of reset the error display code000 JOG+OK 000 P * * RPush 000 JOG+SET OK RPLAYRMC OK ResOK? ResetMZ-N1 Section Electrical Adjustments ResNV CC862 V1 dat AbcdGnDfct 861 V1 num874 V6 dat 873 V6 numVLpwmH Power Supply Manual AdjustmentVclPWM VLpwmLSetTmp RECpwLRECpwH VdpwmIC301 WritPwOfstOK AssyAssy11 OfstResume CC 000 *** NGCD OK MO OKRewriting the patch data PreparationServicing Notes Pre-checkMZ-N1 MZ-N1 Block Diagram SERVO/USB Section MZ-N1 Section DiagramsBeep Mute HP/L Block Diagram Audio SectionBlock Diagram DISPLAY/KEY CONTROL/POWER Supply Section Lead Layouts Main Board Semiconductor LocationIC301 See page 41 for IC Block Diagrams Schematic Diagram Main Board 1/4Flah 40S8 Schematic Diagram Main Board 3/4 See page 40 for WaveformsVCC1 VCC2 22.7 ∝ s WaveformsIC302 AN17020A-VB IC Block Diagrams IC301 AK5354VT-E2IC501 SN761057A IC551 SC111258FCR2 IC601 XPC18A22AFCR2 IC901 XPC18A32AFCR2 IC PIN Function Description SSB Data DRAMVSS0DVSS0 DVDD0Aout SEL KDITrst VG CTLWK DET LCD RSTVref MON Vbus DETVsiosc VdioscOsci OscoIFVDD3 LrckDVSS3 DVDD3Flashvdd XOEXWE EVAChassis section Exploded ViewsNot supplied Bottom Panel Section107 110 102 103 102104 Chassis Section101 108 106156 152 155 154 158 159 153 151157 MD Mechanism Deck Section MT-MZN1-171 Resistors Main Section Electrical Parts ListMain Diode MZ-N1 MainRES-CHIP Short 503 501 502505 504Revision History
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MZ-N1 specifications

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