Sony Ericsson CDP-CX220 service manual Section Electrical Adjustments, Curve Check, Balance Check

Page 19

SECTION 6

ELECTRICAL ADJUSTMENTS

Note:

1.CD Block is basically designed to operate without adjustment. There- fore, check each item in order given.

2.Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3.Use an oscilloscope with more than 10MΩ impedance.

4.Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

S-Curve Check

oscilloscope

BD board

 

TP (FE1)

+

TP (VC)

–

Procedure :

1.Connect oscilloscope to test point TP (FE1) on BD board.

2.Connect test point TP (ADJ) on MAIN board to ground with lead wire.

3.Turn I/u button on to set the ADJ mode.

4.Put disc (YEDS-18) in and playback. Press the [CHECK] button.

5.Check the oscilloscope waveform (S-curve) is symmetrical be- tween A and B. And confirm peak to peak level within 3 ± 1 Vp-p.

S-curve waveform

symmetry

A

within 3 ± 1 Vp-p

B

6. After check, remove the lead wire connected in step 2.

Note: • Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7.

Note: A clear RF signal waveform means that the shape “ ◊” can be clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV: 200 mV

TIME/DIV: 500 ns

level: 1.2 +0.25–0.20Vp-p

E-F Balance Check

oscilloscope

BD board

 

TP (TE)

+

TP (VC)

–

Procedure :

1.Connect oscilloscpe to test point TP (TE) on BD board.

2.Connect the test point TP (ADJ) on MAIN board to the ground with a lead wire.

3.Turn the I/u button on to set the ADJ mode.

4.Put disc (YEDS-18) in to play the number five track.

5.Press the [GROUPÊ3] button. (The tracking servo and the sled- ding servo are turned OFF.)

6.Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following :

A/B x 100 = less than ± 22%

Traverse waveform

Center of the waveform

B

•Take sweep time as long as possible and light up the brightness to obtain best waveform.

0 V

A (DC voltage)

RF Level Check

oscilloscope

(AC range)

BD board

 

TP (RFO)

+

TP (VC)

–

Procedure :

level: 1.3 ± 0.6 Vp-p

7.Press the [GROUPÊ8] button. (The tracking servo and sled- ding servo are turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 6.

Traverse waveform

1.

Connect oscilloscope to test point TP (RFO) on BD board.

2.

Turn

I/u

button on.

3.

Put disc (YEDS-18) in to play the number five track.

4.

Confirm that oscilloscope waveform is clear and check RF sig-

 

nal level is correct or not.

0 V

C (DC voltage)

Tracking servo

 

 

 

Tracking servo

 

 

Sled servo

 

 

 

Sled servo

OFF

 

 

 

ON

8. Disconnect the lead wire of TP (ADJ) connected in step 1.

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Contents Specifications Mechanical Adjustments Table of ContentsExcept for the customers in the United States and Canada Section Servicing Notes Safety CHECK-OUTChecking Method CD-TEXT Test DiscRestrictions in CD-TEXT Display ′ μ Location of Parts and Controls Section GeneralFront Panel Case Section DisassemblyFront Panel Section Rear Panel Section Guide ASS’YBase Unit Mechanism DeckKEY and Fluorescent Display Tube Check Mode Test ModeDisplay Check Mode ADJ ModeOrder of Disc Change Aging ModeSequence of Aging Mode Partial lightingError code Error DisplayAging Method Section Mechanical Adjustments Guide Disc T Alignment Holder Disc A2 Alignment Sensor Alignment Pully and Disc Center Hole Alignment Magnet ASS’Y Alignment RF Level Check Section Electrical AdjustmentsCurve Check Balance CheckRF PLL Free-run Frequency Check Disc Sensor AdjustmentAdjustment Location Circuit Boards Location Section DiagramsThese are omitted Main Section Waveforms BD Section Panel SectionSee page 22 for Circuit Boards Location Printed Wiring Board BD SectionPage CDP-CX220 Schematic Diagram BD SectionPrinted Wiring Board Main Section See page 24 for Waveforms. See page 45 for IC Block Diagrams Schematic Diagram Main SectionPrinted Wiring Boards Jack Section Schematic Diagram Jack Section Printed Wiring Boards Panel Section Semiconductor Location Disp Board See page 24 for Waveforms. See page 46 for IC Block Diagrams Schematic Diagram Panel SectionPrinted Wiring Boards SENSOR/MOTOR Section Page Schematic Diagram SENSOR/MOTOR Section IC Block Diagrams BD Board IC101 CXD2587Q Main Board IC503 CXA1291P IC103 CXA2568M-T6Disp Board IC702 M66310FP IC506 LA5616Pin No Pin Name Function IC PIN Function DescriptionSubq CASE, Front Panel Section Section Exploded Views4949-619-1 Panel ASSY, Front Except US, CND 66 A-4724-031-A Main BOARD, Complete Except US, CND Guide ASSY, Rear Panel SectionAEP, UK, AED, SP, AUS Chassis Section Mechanism Deck CDM-40B 209 212206 210 213 206 205 201 202 203 215 204 214 216258 255 252 X-4947-244-1 Slider BU Adjustment Assy259 259 255 258 257 256 255254 251 252304 Optical PICK-UP Section KSM-213BKN/M-N305 306 303 302Section Electrical Parts ListSens Luminous Sens RAY Catcher Disp Disp Door Motor Door SW Illumination Jack Jack JOG Motor Main Diode RD6.2ESB2 Diode RD30ESB2PST994D Main Motor Sens Sony Corporation

CDP-CX220 specifications

The Sony Ericsson CDP-CX220 is a notable model within the realm of compact disc players, designed to blend advanced technology with user-friendly features. Launched in the late 90s, this device showcases Sony's commitment to delivering high-quality audio experiences through its innovative engineering and design.

One of the standout features of the CDP-CX220 is its impressive capacity. This compact disc player can hold up to 200 CDs, thanks to its innovative carousel system. This allows users to enjoy extended listening sessions without the need to change discs frequently, making it particularly appealing for audiophiles and casual listeners alike. The unit is designed to be both functional and space-efficient, fitting seamlessly into various media setups.

The CDP-CX220 employs Sony’s advanced Digital Sound Processing (DSP) technology, which enhances sound quality by providing clarity and depth to audio playback. This feature is particularly advantageous for those who appreciate detailed soundscapes, as it minimizes distortion and optimizes audio fidelity.

In terms of connectivity, the CDP-CX220 comes equipped with multiple outputs, including digital coaxial and optical connections. This provides users with the flexibility to integrate the player into a wider home audio setup, allowing for high-quality sound transfers to amplifiers and surround sound systems. Additionally, the CDP-CX220 supports standard RCA outputs for connecting to traditional stereo systems.

Navigating through stored CDs is made easy with the CDP-CX220’s user-friendly interface. It includes a remote control, allowing users to access playlists and selections from a distance. The intuitive display provides clear information about track numbers and playback status, ensuring a smooth and enjoyable listening experience.

Furthermore, the player incorporates various playback modes, including shuffle and repeat functions, enabling personalized listening experiences. Users can tailor their listening sessions to suit their moods, whether they desire randomness or continuity in their music selection.

Overall, the Sony Ericsson CDP-CX220 exemplifies a fusion of technology and practicality, designed to cater to the diverse needs of music lovers. Its impressive capacity, superior sound processing, versatility in connectivity, and user-friendly features solidify its reputation as a robust and reliable compact disc player that has stood the test of time.
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