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Perfect for my use.Could have better pictures,but otherwise perfect ;)
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This is one of four manuals I have downloaded recently.
Purchase was very straight forward and the authorising email arrived in about 4 hours.
The quality of the scan is good. Print is clear and square to the page edges.
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Exactly as advertized. High quality digital copy of the Nak 610 user manual. Easy download and access. Highly recommended.
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The manual was exactly what I wanted and I found it nowhere else. Thanks!
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Having purchased a 1994 Kenwood music system from a Charity shop in 2013 (it was a high end product in its day), I found myself not quite knowing where to plug in what, and how to do this, that and the next thing. I needed a Manual, and after failure with another online 'Manual provider' I found Owner Manuals dot com. Well, I wasn't sure, but it was only $5, and if things didn't work out, I wouldn't have lost much...
But things DID work out. After paying my childrens inheritance money, $4.99, I was sent a Manual for my Kenwood System very quickly. Alas, it was in German, and being Scottish, I could not read it or get my system in order from it...a rapid email to them brought the English Manual in short order, and my retro-system was and IS up and running in it's regulation settings.
I am very grateful to http://www.owner-manuals.com for their quick service and for even having such an obsolete Manual in the first place! If you need a Manual for ANYTHING, try here first. I wouldn't be surprised if I bought a 1928 Marconi radio, and got the user Manual for THAT here too!
Top marks.
John Copeland
Glasgow
Scotland
Section V Paragraphs 5-74 to 5-76 5-74. The cause of excessive output ripple on any of the supplies can be isolated in the following manner. Measure the ripple at the output of the rectifiers of the supply in question. Compare the measurement with the value given on the schematic diagram, figu r e 5-33. If the ripple is excessive, check the input filter capacitors and bleeder resistors. If the input ripple is normal, the cause is most likelylow gain in the amplifier transistors.
Model 175A 5-75. Table 5-5 gives troubleshooting aids for locating causes of loss of regulation in each supply. 5-76. The balance between the +6.3 volt and -6.3volt supply outputs and ground is determined by the supply load. The load is a series-parallel arrangement of tube heaters, diagrammed in figure 5-34. An unbalanced output voltage can usually be traced to an open o r shorted tube heater o r a wrong type tube.
Table 5-5. Troubleshooting the Low-Voltage Supply
~~ ~~ ~~ ~
Symptom High output
Procedure
Effect
Trouble Q461 shorted Q461 good
Disconnect base lead of Q461 from Output remains high printed circuit board. This is the yellow lead which connects to r e a r Voltage drops edge of board adjacent to fan motor Reconnect yellow wire to printed circuit board and short collector of Q464 to emitter.
Voltage drops Output remains low Voltage rises
~
Q464 open Q461 open Q461 good CR465 shorted CR465 good Q463 open o r C466 shorted Q463 and C466 Q464 shorted Q464 good Trouble in +llOV
Low output
Short collector of Q462 to emitter
Remove short from Q462 and measu r e voltage across CR465 Measure voltage across R470
0 volt 6 volts
Within 10 volts of output L e s s than output
Measure voltage from collector of Q464 to emitter +llOV High output Check -100 volt supply output
0 volt approx 10 volts
Normal
Disconnect base lead of Q442 from printed circuit board. This is the white lead which connects to r e a r edge of board adjacent to fan motor Voltage drops Reconnect white lead and measure voltage from collector of Q443 to emitter Measure voltage from collector of Q444 to emitter
~~
0 volt
Q443 shorted Q443 good Q444 shorted Q444 good Trouble in + l l O V
Greater than 2 volts
0 volt Greater than 2 volts
Normal Abnormal
Low output
Check -100 volt supply output
Short collector of Q443 to emiiter
Output remains low Voltage r i s e s
I
I
Q441 o r Q442 open Q441 and Q442 good
I
5-14
01526- 2
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