Sony MZ-R91 service manual C l P W M, C h P W M, R h V c l, R h V c h, R l V c l, R l V c h

Page 19
digital
voltmeter
digital
voltmeter
digital
voltmeter

•Adjustment method of VC PWM Duty (L) (mode number: 762)

1.Select the manual mode of the test mode, and set the mode number 762. (See page 12)

LCD display

762V c l P W M

•Adjustment method of VC PWM Duty (H) (mode number: 765)

1.Select the manual mode of the test mode, and set the mode number 765. (See page 12)

LCD display

765V c h P W M

2.Connect a digital voltmeter to the TP915 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.5 ± 0.02 V.

Proceed to the next step without pressing X key if voltage is already adjusted.

digital

voltmeter

MAIN board

TP915 (VC)

TP5105 (GND)

3. Press the X key to write the adjusted value.

• Adjustment method of VREM PWM Duty (H) (mode number: 763)

1.Select the manual mode of the test mode, and set the mode number 763. (See page 12)

LCD display

763V r h V c l

2.Connect a digital voltmeter to the TP915 (VC) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.75 ± 0.02 V.

Proceed to the next step without pressing X key if voltage is

already adjusted.

MAIN board

TP915 (VC)

TP5105 (GND)

3. Press the X key to write the adjusted value.

• Adjustment method of VREM PWM Duty (H) (mode number: 766)

1.Select the manual mode of the test mode, and set the mode number 766. (See page 12)

LCD display

766V r h V c h

2.Connect a digital voltmeter to the TP914 (VR) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.75 ± 0.02 V.

Proceed to the next step without pressing X key if voltage is already adjusted.

digital

voltmeter

MAIN board

TP914 (VC)

TP5105 (GND)

3. Press the X key to write the adjusted value.

•Adjustment method of VREM PWM Duty (L) (mode number: 764)

1.Select the manual mode of the test mode, and set the mode number 764. (See page 12)

LCD display

764V r l V c l

2.Connect a digital voltmeter to the TP914 (VR) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.75 ± 0.02 V.

Proceed to the next step without pressing X key if voltage is already adjusted.

digital

voltmeter

MAIN board

TP914 (VC)

TP5105 (GND)

3. Press the X key to write the adjusted value.

•Adjustment method of VREM PWM Duty (L) (mode number: 767)

1.Select the manual mode of the test mode, and set the mode number 767. (See page 12)

LCD display

767V r l V c h

2.Connect a digital voltmeter to the TP914 (VR) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.5 ± 0.02 V.

Proceed to the next step without pressing X key if voltage is

already adjusted.

MAIN board

TP914 (VC)

TP5105 (GND)

3. Press the X key to write the adjusted value.

2.Connect a digital voltmeter to the TP914 (VR) on the MAIN board, and adjust [VOL +] key (voltage up) or [VOL --]key (voltage down) so that the voltage becomes 2.5 ± 0.02 V.

Proceed to the next step without pressing X key if voltage is

already adjusted.

MAIN board

TP914 (VC)

TP5105 (GND)

3. Press the X key to write the adjusted value.

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Contents NEW SpecificationsLCX-2R Flexible Circuit Board Repairing Table of ContentsDiagrams Exploded Views Electrical Parts ListEeprom Section Servicing NotesLocation of Controls Headphones with a remote control RM-MZ2SSection GeneralPanel ASSY, Bottom Section DisassemblyUpper Panel Section MZ-R90 LCD MODULE, BUTTON, CONTROL, Service ASSY, Upper PanelMZ-R91 Belt ASSY, Ornamental Main BOARD, Case ASSY, BatteryChassis ASSY, SET, MD Mechanism Deck MT-MZR90-165 Service ASSY, OPMotor Flexible Board Holder AssyMOTOR, DC Sled M602 Releasing the Test Mode Test ModeSetting Method of Test Mode Operation in Setting the Test ModeManual Mode Configuration of Test ModeA n u a l 011 0 5 9 a 0 Overall Adjustment Mode011 0 F F J 0 011 0 6 3 B 0T r y Sound Skip Check Result Display ModeSetting method of Sound Skip Check Result Display Mode T a t000 1 s t Self-Diagnosis Display ModeREC Description of Error Indication CodesClearing Self-Diagnosis Data and Total Recording Time Description of Indication HistoryKey Indication Key Check ModeE s Section Electrical AdjustmentsE s N E s O K ?R h V c h C l P W MC h P W M R h V c lD O K E t T m pS S Y D R U NE s C l r Laser Power CheckO O K E s u m eREC Digital Section DiagramsBlock Diagram Servo Section Signal PathBlock Diagram KEY CONTROL/DISPLAY/POWER Supply Section Block Diagram A/D, D/A CONVERTER, Audio SectionSignal Path Play Analog OUT REC Analog REC Digital Semiconductor Location Printed Wiring BoardJEW MZ-R90/R91 IC304, 305 RN5RZ25AA-TR IC Block Diagrams IC301Waveforms IC501 SN761056ADBTIC602 IC601IC605 XC6367B103MR IC803 XC6383C301MR IC603IC902 IC901 IC804 RV5C348A-E2IC PIN Function Description VSC0 VDC0Swdt SclkIxoe VDIO1VSIO1 XrasVDC4 XlrfApcref LddrWrpwr Sync RECPause KEY SenseGND SW FfclrSleep TSB EdgeREC KEY Half LockRMC KEY SET KEYPanel Section MZ-R90 Section Exploded ViewsHK, CH, JEW Chassis section Not supplied Panel Section MZ-R91101 105 113 112 114 106 110 107 111 109 Chassis Section102 103 104 108 109 MD-MECHANISM Deck Section Main Electrical Parts ListCAP, Chip Ceramic Chip 5PFIC MPC17A56FTAEB ConnectorFILTER, Chip EMI Common Mode CXD2660GATransistor ZDT6718TA FET HAT2051T-ELFET HAT2050T-EL FETComposition Circuit Block SwitchOPEN/CLOSE Detect Miscellaneous SWITCH, Slide HoldSWITCH, Slide Synchro REC Thermistor TH901 1-803-795-21 THERMISTOR, Positive VibratorSubject Addition of Korean Model Correction MZ-R90/R91Exploded Views Electrical Parts ListHong Kong Model Korean Model 151 176 @ 112 105 106 #114Indicates changed portion.EXPLODED Views IC MPC18A31FTAEB IC MPC17A56FTA
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