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Very quick and easy website to use and fast download of manual, quality of manual is excellent and will be pleased to use this service again in the future, thanks so much!
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Easy and secure way to get a complete service manual of a vintage hifi component. Only some parts of the print copy are dificult to read. Nice price!
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The manual is an excellent reproduction with complete schematics, made troubleshooting and repair a simple process.
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Up to now you are the BEST! Prompt-efficient and so reasonable ! I have been after SONY service manual for quite some time !Thank you very much ! I can recomend your service to
all my collegagues ! V.Bergfield .
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This is a very good quality print (scan) of the original SONY service manual. The original from Sony is on very thin paper. Nevertheless it is very clear and sharp and excellent readable. I'm very satisfied to have now this rare document. I've looking for it many years (infrequent). It contains very detailed circuit diagrams, exploded views, part lists, PCB view with good readable connection lines. Very recommended.
SECTION 1 SERVICING NOTES
1-1. WRITING FOCUS/TRACKING AUTO GAIN DATA
In general for the CD players that use a digital servo IC, the focus/ tracking gain is automatically adjusted each time a disc is changed. In this set, the gain in test disc (YEDS-18) has been written to a nonvolatile memory (IC803: X24C01S) on the Display Board, and therefore the gain is not readjusted even if a disc is changed. Accordingly, always write auto gain data when replacing the Servo Board, IC803 on Display Board, or optical pick-up. 1)Connect CN805 1 pin (IN/OUT SW) and 6 pin (GND) on Display Board. Under this condition, the set will operate even when the disc lid is open (or Key Board is not connected). 2)Connect TP (ADJ: CN105 3 pin) on Servo Board to GND, and TP (VC: CN108 2 Pin) to TP3 (TEI: IC105 @¶ pin) with lead wires respectively. 3)Connect an oscilloscope to TP (TE: CN108 1 pin).
Oscilloscope SERVO board TP (TE) TP (VC)
+ �
1-2. AF MODE
With the TP (AFJ: CN105 2 Pin) connected to the GND on Servo Board, turn on the POWER switch, and the AF mode is activated and the following checking can be made. 1-2-1. FL tube check All tubes turn on, then if · button is pressed, the display will be as shown below. (Segment ON 1)
(Segment ON 1)
IF P button is pressed, the display will be as shown below. (Segment ON 2)
2 6 12 16 18 8 14 20 4 10
(Segment ON 2)
4)Insert the test disc (YEDS-18), turn on POWER switch, and play fifth music with · (PLAY) and AMS Keys on the Remocon. 5)Adjust RV101 so that the waveform on oscilloscope is verticolly symmetric with respect to the A [Vdc], and also its level is 1.3 ± 0.6 Vp-p.
B 0Vdc A
If STOP p is pressed, all tubes turn on again.
symmetric level: 1.3 ± 0.6 Vp-p
At this time, A/B � 100 = ± 22 (%) or less 6)The auto gain data are written when a lead wire between TP (ADJ: CN105 3 pin) and GND is removed. Note: If the POWER switch was turned on without connecting TP (ADJ) to the GND, auto gain data are not written to the memory even if a disc is inserted, but the previous data saved in the memory are used as focus/tracking data.
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