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SONY HCDVX550
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY HCDVX550 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 17 (click to view)
CD SECTION
Note: 1. CD Block is basically designed to operate without adjustment. Therefore, 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 10 MΩ 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.

E-F Balance (1 Track Jump) Check
oscilloscope BD board TP (TE) TP (VC)
+ –

VIDEO SECTION Frequency Adjustment
Connection:
frequency counter VIDEO board (27 MHz) + –

S-Curve Check
oscilloscope BD board TP (FE) TP (VC)
+ –

Procedure : 1. Connect oscilloscpe to TP (TE) and TP (VC). 2. Turn the power ON. 3. Load a disc (YEDS-18) and playback the number five track. 4. Press the ^ (CD) button. (Becomes the 1 track jump mode) 5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.
1 track jump waveform

Procedure: 1. Connect oscilloscope to TP (FE). Connect between TP (FE1) and TP (VC) by lead wire. Connect between TP (AGCCON) and TP (GND) by lead wire. Turn the power ON. Load a disc (YEDS-18) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search) 6. Cofirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 4 ± 1 Vp-p.
S-curve waveform
symmetry

2. 3. 4. 5.

center of waveform B

Procedure: 1. Connect the frequency counter to check point of the VIDEO board. 2. Turned power switch on. 3. Press the FUNCTION button to select the CD. 4. Adjust CT503 on the VIDEO board so that the frequency counter reading 27.0 MHz ± 80 Hz at stop status. Adjustment Location:

0V

A (DC voltage)

VIDEO Board (SIDE B)

level = 1.3 ± 0.6 Vp-p

symmetry

A Specified level: B × 100 = less than ± 22%

6. After check, remove the lead wire connected in step 1.
A within 4 ± 1 Vp-p B

Checking Location: BD BOARD (Side B)
CN501
100 81 51 80 SL501 SL502
TP (FE1)

7. After check, remove the lead wire connected in step 2 and 3.
Note: • Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. • Take sweep time as long as possible and light up the brightness to obtain best waveform.

(GND) 30
TP (AGCCON) TP (GND) TP (RF)

1

RF Level Check
oscilloscope BD board TP (RF) TP (VC) + – IC102 TP (TE) TP (FE) IC103

CT503 31 VIDEO Frequency Check point Adjustment (27 MHz) 50

IC505

Procedure: 1. Connect oscilloscope to TP (RF). 2. Connect between TP (AGCCON) and TP (GND) by lead wire. 3. Turn the power ON. 4. Load a disc (YEDS-18) and press the ^ button to play. 5. Confirm that the oscilloscope waveform is clear and check RF signal level is correct or not. 6. After check, remove the lead wire connected in step 2.
Note: Clear RF signal waveform means that the shape “≈” can be clearly distinguished at the center of the waveform.

CN502
IC101 TP (VC)

D502

SL503

VOLT/DIV: 200 mV TIME/DIV: 500 ns

level: 1.45 ± 0.3 Vp-p

17

17

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