D-FS601
SECTION 1
SERVICING NOTES
TABLE OF CONTENTSNOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR
1. SERVICING NOTESááááááááááááááááááááááááááááááááááááááááááááááááááááááá3BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
2. GENERALáááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááá4breakdown because of the potential difference generated by the charged
electrostatic load, etc. on clothing and the human body. During repair, pay
3. DISASSEMBLYáááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááá6attention to electrostatic breakdown and also use the procedure in the printed
matter which is included in the repair parts.
3-1. Upper Lid, Middle Cabinet ááááááááááááááááááááááááááááááááááááááááááá 6
The flexible board is easily damaged and should be handled with care.
3-2. MD Assy (CDM-3125ER), MAIN Board ááááááááááááááááááááá 7
3-3. Turn Table Motor Assy (Spindle) (M901) ááááááááááááááááááááá 7
NOTES ON LASER DIODE EMISSION CHECK
3-4. Motor Assy (Sled) (M902), Optical Pick-upThe laser beam on this model is concentrated so as to be focused on the disc
(DAX-25E) áááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááá 8reflective surface by the objective lens in the optical pick-up block. Therefore,
3-5. SWITCH Board, Hold Leverááááááááááááááááááááááááááááááááááááááááá 8when checking the laser diode emission, observe from more than 30cm away
from the objective lens.
4. ELECTRICAL ADJUSTMENTSááááááááááááááááááááááááááááááááá9
Before Replacing the Optical pick-up Block
Please be sure to check thoroughly the parameters as per the OOptical pick-
5. DIAGRAMSáááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááááá11
up Block Checking Procedure� (Part No. : 9-960-027-11) issued separately
5-1. Block Diagrams � MAIN Section � áááááááááááááááááááááááááááá 12before replacing the optical Pick-up block.
� TUNER Section �ááááááááááááááááááááááááááááááááááááááááááááááááááááá 13Note and specifications required to check are given below.
5-2. Printed Wiring Board � MAIN Board (Side A) � ááááááá 14
Y FOK output : IC601 yg pin (TP610)
5-3. Printed Wiring Board � MAIN Board (Side B) � ááááááá 15
When checking FOK, remove the lead wire to disc motor.
5-4. Schematic Diagram � MAIN Board (1/5) � ááááááááááááááá 16
Y RF signal P-to-P value : 0.4 to 0.5Vp-p
5-5. Schematic Diagram � MAIN Board (2/5) � ááááááááááááááá 17
5-6. Schematic Diagram � MAIN Board (3/5) � ááááááááááááááá 18Laser Diode Checking Methods
5-7. Schematic Diagram � MAIN Board (4/5) � ááááááááááááááá 19During normal operation of the equipment, emission of the laser diode is
5-8. Schematic Diagram � MAIN Board (5/5) � ááááááááááááááá 20prohibited unless the upper panel is closed while turning ON the S801 (push
5-9. Printed Wiring Board � SWITCH Board � áááááááááááááááá 21switch type).
The following two checking methods for the laser diode are operable.
5-10.Schematic Diagram � SWITCH Board � ááááááááááááááááááá 22
5-11.IC Pin Function Descriptions áááááááááááááááááááááááááááááááááááááá 23
Method :
5-12.IC Block Diagrams áááááááááááááááááááááááááááááááááááááááááááááááááááááá 27
Emission of the laser diode is visually checked.
1. Open the upper lid.
6. EXPLODED VIEWSáááááááááááááááááááááááááááááááááááááááááááááááááááááá282. Push the S801 as shown in Fig. 1 .
6-1. Upper Lid Section ááááááááááááááááááááááááááááááááááááááááááááááááááááááá 283. Check the object lens for confirming normal emission of the laser diode.
6-2. Cabinet Section ááááááááááááááááááááááááááááááááááááááááááááááááááááááááááá 29If not emitting, there is a trouble in the automatic power control circuit or
the optical pick-up. During normal operation, the laser diode is turned
6-3. Cabinet Lower Section áááááááááááááááááááááááááááááááááááááááááááááááá 30
ON about 2.5 seconds for focus searching.
6-4. Optical Pick-up Section (CDM-3125ER)áááááááááááááááááááá 31
7. ELECTRICAL PARTS LISTááááááááááááááááááááááááááááááááááááááá32
S801
Fig. 1 Method to push the S801
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ACEC
