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This service manual helped me to repair my PIONEER. Iam very satisfied, that I found it here.
Even the price of manual was not so high that person would not be able to spend a few money.
But that is very worth spent money. Thanks
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Excellent quality service manual. Quick processing, fair prices. Love to do business again. Thank you!!!
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Excellent service manual, the only known point of note is the alignment of improvability scanned pages within the pdf page. The resolution is good.
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I was very glad recieving the service manal from You. Additionaly very fast. Extremaly nice servicing. Thanks very mach! Now my GX-220 working better, than it was made. Alexander from Moscow, Russia/
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Sweet! I won the item on eBay and couldn't adjust the geometry or even keep a steady picure. This guide has the full schematics (not available anywhere else as far as I could tell), and was a bargain for the wealth of knowledge it contains. I hooked it up to my testing equipment, tweaked a few potentiometers and got it playing videogames in no time. Thanks!
SECTION 1 SERVICING 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. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30cm away from the objective lens. Before Replacing the Optical pick-up Block Please be sure to check thoroughly the parameters as per the �Optical pick-up Block Checking Procedure� (Part No. : 9-960027-11) issued separately before replacing the optical Pick-up block. Note and specifications required to check are given below. � FOK output : IC601 ((£ pin (FOK). When checking FOK, remove the lead wire to disc motor. � S curve P-to-P value : 1.2 � 2Vp-p IC501 !§ pin. When checking S curve P-to-P value, remove the lead wire to disc motor. � RF signal P-to-P value : 0.5 � 0.9Vp-p � Traverse signal P-to-P value : 1.2 � 2.0Vp-p � The repairing grating holder is impossible. Laser Diode Checking Methods During normal operation of the equipment, emission of the laser diode is prohibited unless the upper panel is closed while turning ON the S804 (push switch type). The following two checking methods for the laser diode are operable. Method-1 (In the service mode or normal operation) : Emission of the laser diode is visually checked. 1. Open the upper lid. 2. Push the S804 as shown in Fig. 1-1. 3. Press the � key. 4. Check the object lens for confirming normal emission of the laser diode. If 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 ON about 2.5 seconds for focus searching.
TP810
AC2211397 current value A : less than 48 mA year month date shift No. line No. version
3. Connect a digital voltmeter as shown in Fig. 1-2 4. Press the � key. 5. Calculate the current value by the reading of the digital voltmeter. Reading of the digital voltmeter V ÷ 4.7 � = current value (A) (Example) Reading of the digital voltmeter of 0.2256 V : 0.2256 V ÷ 4.7 � = 0.048 (A) = 48 mA 6. Check that the current value+5 within the following range. is � Current value of the label -11 mA(25�C) Variation by temperature : 0.4mA / �C Current increases with temperature increased. Current decreases with temperature decreased. If the current is more than the range above, there is a trouble in the automatic power control circuit or the laser diode is in deterioration. If less than the range, a trouble exists in the automatic power control circuit or the optical pick-up.
Q506
[MAIN BOARD] (SIDE B)
R543 L506 R542 C529 R518 R525 C519 R523 R517 R513 R510 R511 C509 TP521
R522 R528
IC501
R507 TP512 R506
digital voltmeter TP524 TP520
C516
R516
R544
C526
R512
TP522 TP523 (FE) (TE)
Fig.1-1 Method to push S804
E C B TP540 R554
E C B
C530
BCE
C508
Fig. 1-2 Digital Voltmeter Connecting Location
�3�
Q501
R531
R532
1. Remove the upper panel. 2. Read the current printed on the rear side of the optical pick-up. (Print on the rear side of the optical pick-up)
BC E
C525 TP534
D501
Method-2 (In the service mode or normal operation) : Check the value of current flowing in the laser diode.
TP537 TP530 R527 Q503
TP535(RFO) TP524
TP520
C507
C502
R509
R514
R520
Q504
Q507
TP525
BCE
R521 C518
Q502
S804
R519
6 5 4
16 25 34 R526
1 2 3 R515
R751
TP752 TP508 (VC)
11 15 20 5 1 10
TP809 C522 TP531 TP536
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