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I Have looked for this manual for quiet a while now, I have finally found it here. I believe this is the only place they have them in a very nice scan, pages are very clear to read, some of the pages are a bit tilted but overall it is great to have this manual available for purchase. Thanks
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This is quiet a rare manual, I Have looked for this manual for quiet a while now, I have finally found it here. I believe this is the only place they have them in a very nice scan, Excellent guide: very clear, enabling us to print readable diagram overall it is great to have this manual available for purchase. This is a complete service manual no pages are missing. Thanks
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This SM is quiet scarce and hard to find it is an excellent Service manual, very clear to read and to print schematics and diagrams, Hi quality, Complete manual with no pages missing. I am very pleased with the manual and the fast service I have received. Great place to shop.
Good luck finding you manual...
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Quick delivery, the document was usefull, although the copy was i little bit unclear in the details.
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A complete and well done copy of the manual, at a not expansive price!
The delivery of the manual is very fast.
Thank you for all
NOTE ON BEFORE STARTING REPAIR
1. Forced discharge of electrolytic capacitor of power supply block
When repair is going to be attempted in the set that uses relay circuit in the power supply block, electric potential is kept charged across the electrolytic capacitors (C101, 102) even though AC power cord is removed. If repair is attempted in this condition, secondary defect can occur. In order to prevent the secondary trouble, perform the following measures before starting repair work.
Discharge procedure
1 Remove the AC power cord. 2 Connect a discharging resistor at an end of lead wire that has clips at both ends. Connect the other end of the lead wire to metal chassis. 3 Contact the other end of the discharging resistor to the positive (+) side (+VH) of C101. (For two seconds) 4 Contact the same end of the discharging resistor as step 3 to the negative (-) side (-VH) of C102 in the same way. (For two seconds) 5 Check that voltage across C101 and C102 has decreased to 1 V or less using a multimeter or an oscilloscope.
MAIN C.B D101
3 C101 C102
4
2
2
Select a discharging resistor referring to the following table. Charging voltage (V) (C101, 102) 25-48 49-140 Discharging resistor (�) 100 220 Rated power (W) 3 5 Parts number 87-A00-247-090 87-A00-232-090
Fig-1
Note: The reference numbers (C101, C102) of the electrolytic capacitors can change depending on the models. Be sure to check the reference numbers of the charging capacitors on schematic diagram before starting the discharging work.
2. Check items before exchanging the MICROCOMPUTER
Be sure to check the following items before exchanging the MICROCOMPUTER. Exchange the MICROCOMPUTER after confirming that the MICROCOMPUTER is surely defective.
2-1. Regarding the HOLD terminal of the MICROCOMPUTER
When the HOLD terminal (INPUT) of the MICROCOMPUTER is �H�, the MICROCOMPUTER is judged to be operating correctly. When this terminal is �L�, the main power cannot be turned on. Therefore, be sure to check the terminal voltage of the HOLD terminal before exchange. When the MICROCOMPUTER is not defective, the HOLD terminal can also go �L� when the POWER AMPLIFIER has any abnormalities that triggers the abnormality detection circuit on the MAIN C. B. that sets the HOLD terminal to �L�.
� Good or no good judgement of the MICROCOMPUTER
1 Turn on the AC main power. 2 Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the �H� level or not. 3 When the HOLD terminal is �L� level, the abnormality detection circuit is judged to be working correctly and the MICROCOMPUTER is judged to be good.
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