SONY DF201
Manual de Servicio

D-F200/F201 SECTION 1 SERVICE NOTE
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. Precautions for Checking Emission of Laser Diode Laser light of the equipment is focused by the object lens in the optical pick-up so that the light focuses on the reflection surface of the disc. Therefore, be sure to keep your eyes more then 30 cm apart from the object lens when you check the emission of laser diode. Before Replacing the Optical Pick-Up Block Please be sure to check throughly the parameters as par the �Optical Pick-Up Block Checking Procedures� (Part No.: 9-960-02711) issued separately before replacing the optical pick-up block. Note and specifications required to check are given below. � FOK output : IC601 yg pin When checking FOK, remove the lead wire to disc motor. � RF signal P-to-P value : 0.45 ± 0.1 Vp-p � The repairing grating holder is impossible.
16

detection lever

detection lever

S801

main board

� MAIN BOARD (SIDE B) �
C34 C36
CF1 TP18 TP5

D304
TP311 Q7 C29 FB311 FB111 Q8

C201

C2

TP1 D1 L1 FR MODEL S801 CD DOOR OPEN TP816

R17 R843

R27 R28 C30

C300

C104 R19 C318 C7

operable. � Method: Emission of the laser diode is visually checked. 1. Open the upper lid. 2. With a disc not set, turn on the S801 with a screwdriver having a thin tip as shown in Fig.1. or TAP802 is shorted as shown in Fig.2. Note: Do not push the detection lever strongly, or it may be bent or damaged. 3. Press the N X button. 4. Observing the objective lens, check that the laser diode emits light. When the laser diode does not emit light, automatic power control circuit or optical pick-up is faulty. In this operation, the objective lens will move up and down 5 times along with inward motion for the focus search.

CT3 C352 R101 R7 R18 C354

R6 D2 C46 L4

TP20

R354

C8 C319 C301 C353 R16 R317 R102 R26 C351

R24

ROD ANTENNA

C359

TP813

C13 C10 P75

S801

IC302

C15 R9

D3 S810

C9

13 24

1 12

C37

C41

S811

R154

the S801. (push switch type) The following two checking methods for the laser diode are

L3 AM FERRITE-

R841 R353 R316 C841

Fig. 1

C154 Q53 R70 C350 R254

C254

Laser Diode Checking Methods During normal operation of the equipment, emission of the laser diode is prohibited unless the upper lid is closed while turning ON

R3

R2 C3

C313
R202

L312

� MAIN BOARD (SIDE A) �

C361 C204

C39

R201 C360

R25

C43 TAP802

R8 TP416 D301

TAP802

Fig. 2

R72

3