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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!
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It was just what I need to fix my old BMW's CD player. Very convenient also. Thank you.
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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.
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Great manual very clear copied. You are making an incredible job. I appreciate a lot the rapidity and your efficiency. Thanks a lot
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Good pdf of the service manual for this unit. Includes disassembly instructions, full schematics, board layouts, parts lists and diagnostic information. Some information is in the pdf twice (single pages, and split pages), but that could be how it was originally generated by panasonic, or perhaps the idea is to make it eaiser to put onto 8.5 x 11" pages.
Information was exactly what I needed. Delivery was overnight (less than 12 hours) and I was happy with the process.
7
Does pulse of L = 1.65V and H = 3.3V develop at pin 131 and L = 0V and H = 1.65V develop at pin 132 of IC401? Y Y Check signal process system following to IC402. Does RF output higher than 1 V(p-p) develop at pin 30 (TP502) of IC502? Y N
Disc playback is NG (DVD).
N
Is PLL locked? (Refer to waveforms.)
N
Check peripheral circuits of IC401 and IC306.
Check IC502. Lens cleaning.
N
Pin 43 of IC502 = 2.4V Pin 44 of IC502 = 3.0V
Pickup mechanism replacement
Y Check peripheral circuits of IC401 and IC306. Check peripheral circuits of IC502 and IC401.
Fig. 1-3-16
PLL works as a servo loop to generate a clock signal for reading RF signal binary data. With the PLL locked, the eye pattern is identified clearly when triggered with the read clock PLCK.
DVD RF signal
DVD playback waveform
DVD RF signal Pin 30 (TP502) of IC502
DVD RF signal Pin 30 (TP502) of IC502
V : 500 mV/div H : 50 ns/div
DVD PLCK Pin 117 (TP409) of IC401
Fig. 1-3-17
CH1 : TP502 DVDRF 500 mV/div CH2 : TP409 DVDPLCK 5 V/div 50 ns/div
Fig. 1-3-19
CD RF signal
CD playback waveform
CD RF signal Pin 30 (TP502) of IC502
CD RF signal Pin 30 (TP502) of IC502
V : 500 mV/div H : 100 ns/div
CD PLCK Pin 117 (TP409) of IC401 CH1 : TP502 CDRF 500 mV/div CH2 : TP409 CDPLCK 5 V/div 100 ns/div
Fig. 1-3-18
Fig. 1-3-20
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