Sony MZ-E505 service manual VclPWM, Res NV CC, Res OK?, 021 Res, Reset

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MZ-E505

SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. GENERAL

In this set, CD and MO discs can be automatically adjusted by set- ting the Overall Adjustment mode within the TEST MODE, Before performing these automatic adjustments, it is necessary to clear the memory and adjust the power in the Manual mode.

5-2. NOTES FOR ADJUSTMENT

5-2-1. Jigs

 

CD disc

TDYS-1 (part code: 4-963-646-01)

MO disc

PTDM-1 (part code: J-2501-054-A)

 

 

or commercially available MO disc (recorded)

Digital voltmeter

Ammeter

5-2-2. Adjustment sequence

The adjustments should be always performed in the following sequence:

5-4. MANUAL POWER ADJUSTMENTS

5-4-1. Adjustment sequence

The adjustments should be always performed in the following se- quence:

1Vc PWM Duty (L) adjustment (item No.:762)

r

2 Vl PWM Duty adjustment (item No.:764) r

3 Vb A/D value check (item No.:731)

5-4-2. Vc PWM Duty (L) adjustment

Connection:

digital voltmeter

MAIN board

1Reset NV (Clear the memory)

2Manual power adjustments

3Electrical offset adjustments (Do not enter the disc)

4Overall CD adjustments

5Overall MO adjustments

6RESUME clear

7Rewrite the NV value

5-2-3. Power

Manual mode

Overall adjustment mode

TP901 (VC)

TP921 (GND)

Procedure:

1.Confirm that the power voltage is at 1.5 V DC.

2.Set the TEST MODE.

3.Set the overall adjustment mode and press PLAYMODE key, item No. will change to 762.

LCD display

762 VclPWM XX

4.Connect a digital voltmeter to TP901 (VC) and TP921 (GND) on the main board and adjust VOL + (voltage up) and VOL –

(voltage down) on the remote control.

The power is supplied with 1.5 V DC from the battery case.

5-3. RESET NV

5-3-1. How to reset NV

1.Set the TEST MODE.

2.Set the Manual mode and set the item No. 021, Reset NV. LCD display

021 Res NV CC

Adjustment value:2.35V

Standard value:2.34 to 2.355V

5. Press X key to write the adjustment value.

3.Press X key on the remote control. LCD display

021 Res OK?

4.Press X key on the remote control again. LCD display

021 Res ***

After reset is completed.

021Reset!

5.Press x key to terminate the Manual mode and return to the

TEST MODE.

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Contents Specifications NEWLCX-4E Diagrams Table of ContentsDisassembly Exploded ViewsFlexible Circuit Board Repairing Section Servicing NotesSilver Blue Pink Violet Section GeneralSection Disassembly Disassembly FlowBattery Case LID Case RearMain Board Upper Panel SectionSwitch Board Holder Assy ZMechanism Deck MT-MZE505-176 Bracket L Assy Bracket R AssyOptical PICK-UP LCX-4E DC SSM18B Motor Spindle M901DC Motor Sled M902 Section Test Mode Setting the Test ModeGeneral OFEJ5E ManualXXXS5E 011 063B5ESelf-diagnostic mode Overall Adjustment ModeSELF-DIAGNOSTIC Display Mode 001 1 AdrsClearing the error display code 000 0F 000 P**P##000 P**R00 000 EIB Stat Adrs BEmp 000 ###### 000 FF 0FRes NV CC ResetVclPWM Res OK?Assy11 VlPWMVbAD Ofst041 Res MO OKNoClock ResClr075 GRN35H LED Voltage Adjustments071 Red35H LED voltage checkVred High luminosity RED voltage value item No LED voltage adjustment Section Diagrams Block DiagramWaveforms IC501 ed RF OUTPrinted Wiring Board Main board Component Side Semiconductor LocationComponent Side Printed Wiring Board Main board Conductor Side IC5511RT 1FT 1FF 1RF VI2 RMC Dtck IC Block Diagrams IC301 TA2131FL ELIC551 SC111258FCR2 XPC18A32FCR2 IC PIN Function Description SO1 SCS1SI1 SCK1AVS2 AdioAVD2 AdrbDSPVSS1 SpdwDSPVDD2 SpcuSSB Data TEST1, TEST0EVA SSB CLKOPR LED G H XCS LCDLCD STB REC OPR LEDSection Exploded Views Upper PANEL, Case Rear Section60 X-3381-109-1 Terminal Board ASSY, Battery Ornamental Belt Section310 Mechanism Deck Section MT-MZE505-176314 313 312 311 306 308 307 305 304 303 302 301Main BOARD, Complete Capacitor Section Electrical Parts ListMain Ceramic ChipDiode 1SS367-T3SONY Ferrite Bead ConnectorDiode FerriteSwitch Revision History

MZ-E505 specifications

The Sony MZ-E505 is a portable mini-disc player that emerged in the early 2000s as part of Sony's innovative move towards digital audio solutions. This compact device combines functionality, versatility, and cutting-edge technology, making it a popular choice among music enthusiasts. The MZ-E505 stands out due to its sleek design and impressive features, setting the standard for portable audio players of its time.

One of the main characteristics of the MZ-E505 is its lightweight design, weighing approximately 160 grams. Its portability is complemented by an elegant, user-friendly interface, which includes a simple set of buttons for easy navigation through tracks and folders. The device features a bright LCD display that shows essential information such as track number, time elapsed, and battery life, ensuring users remain informed while on the go.

The MZ-E505's standout feature is its mini-disc technology, allowing users to record and playback high-quality audio. Mini-discs, introduced by Sony in the 1990s, offer an advanced storage solution that can hold up to 74 minutes of high-fidelity stereo sound on the standard format. The player also supports LP2 and LP4 modes, enabling users to double or quadruple the recording capacity, which is perfect for those who require more space for their music collections.

In terms of sound quality, the MZ-E505 utilizes Sony’s ATRAC (Adaptive Transform Acoustic Coding) compression technology, which ensures that audio playback is clear and precise. The device is equipped with a 20-second shock protection mechanism to prevent interruptions during playback, giving users peace of mind while enjoying their favorite tracks during activities like jogging or commuting.

Battery life is another crucial aspect, and the MZ-E505 doesn’t disappoint. It features a rechargeable battery that can provide up to 10 hours of continuous playback on a full charge. Additionally, users have the option to utilize standard AA batteries as an alternative power source.

The MZ-E505 also incorporates a variety of connectivity options, including an analog line-in for direct recording from external sources. This feature was particularly appealing for audiophiles who wanted to create their mix compilations.

Overall, the Sony MZ-E505 is a remarkable blend of portability, sound quality, and innovative technology, representing the quintessential qualities of early digital audio devices. Although the mini-disc format has since been largely superseded by other digital technologies, the MZ-E505 remains a cherished piece of audio history, celebrated for its unique capabilities and breathtaking design.