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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.
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/
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!
It was just what I need to fix my old BMW's CD player. Very convenient also. Thank you.
Great Manual! It contains all the wiring schematics and mechanical exploded views that are essential for service and repair. I was surprised I even found this for such an old machine. Only wish I knew of this site many years ago.
No. ITEM INPUT SETTINGS OUTPUT SETTINGS Apply the sensor section of optical power meter on the pickup lens. PLAYER SETTINGS While pressing the DISC 3 key, turn the AC ON. Press the DISPLAY key, and then press the SELECT [ 3 ] key. confirm that the display is "2 01". Press the SELECT key(3), then confirm that the display is"2 01". ALIGNMENT POINTS ALIGN FOR On the power from 0.05 to 0.15 mW, when the diffraction grating is correctly aligned with the RF level of 0.8 Vp-p or more. Symmetry between upper and lower patterns DC=0Â±25mV FIG.
TRACKING ERROR BALANCE
Test disc Type 4
Connect an oscilloscope as follows. CH1 : RF (CN2 PIN1) CH2 : TE1 (CN2 PIN6)
TE BALANCE VR2
FOCUS ERROR BIAS
Test disc Type 4
Connect an oscilloscope as follows. CH1 : RF (CN2 PIN1) CH2 : TE1 (CN2 PIN6) Connect a LPF to CN2 pin 5-6 to which you connect an oscilloscope or AC voltmeters.
Press the SELECT key(3), then confirm that the display is "2 02".
FE BIAS VR1
Optimum eye pattern
(b) or (d)
Test disc TRACKING Apply Type 4 of 1.2 signal GAIN kHz, 50mVrms to CN2 pin 5-6.
Press the SELECT display then confirm that thekey(3), is "2 02".
TRACKING GAIN VR3
Two VTVMs should read the same value.
Note: Type 4 disc : SONY YEDS-18 Test Disc or equivalent. LPF: Around 47 kâ¦ + 390 pF or so. Step 1~4 are in Test Mode.
(a) Laser power
(e) Tracking gain CN2
1 2 3
VC + + L.P.F. VTVM
_ Pickup 1.2 kHz 50 mVrms Optical power meter +
4 5 6 7