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The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
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Perfect source for service manuals: fast and professional transaction; high quality, perfect readable and largely scaleable PDF; complete schemes, diagrams and spare part list. Tnx a lot, cu again!!!!
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I got your link from a friend and I must say that I am really satisfied with your service. Specially this B&O manual I didn't find anywhere on the web... but you could deliver it :-) . You deliver very fast and the copy is of good quality. So your webpage is bookmarked. Thanks
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This was the Sony CCU-500A Service manual I was looking for.
The price was reasonable.
The permission to download was quck.
I will use Owner-Manual.com for all my manual needs.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
3-3-1. Keyboard Check
1) Turn power ON while pressing the 2 LEARN key in Fig. 1 and the 7 ASMBL key in Fig. 2 at the same time. 2) Press the !] EJECT key. 3) Again press the !] EJECT key, and �11�� appears on the left 7-segment display. Press keys in the order of 1, 2, 3�#\ and #;. When mistake the operation, press keys in the order of 1, 2, 3�#\ and #; again. 4) Press the !] EJECT key. �22�� appears on the left 7-segment display while �P1 on� appears on the right 7-segment display. (1) Place all indoor switches #' to $= in Fig. 1 in upper position, and press the !] EJECT key. If a fault is found, �Error� is displayed. In this case, press the ![ STDBY key, then the number of error switch is displayed. If many error exist, the number of next error switch is displayed whenever press the ![ STDBY key. For switch number, refer to the following.
1
PLAYER
TC RTC CTL
All LEDs must come on.
All LEDs must go off.
01, 02�35, 0H must appear on the right 7-segment display. No error display allowed.
�P1_ _ _ _0H� must appear on the right 7-segment display. No error display allowed.
3
PREROLL
7 5 3
4
SYNCHRO
ON/CF ON OFF
6
RECORDER
TC RTC CTL
LEARN
7 6 5 4 3
SYSTEM PRESET
2 1 0
ON OFF
7
6
5
4
3
2
1
0
7
8 . . . . . 13 14 15 16 . . . . . 21 22
(2) Place the above switches in lower position, and press the !] EJECT key twice. (3) Place #', #,, #. and $/ switches in Fig. 1 in center position, and press the !] EJECT key twice. 5) Press the !] EJECT key. �33�� appears on the left 7-segment display. (1) Set both search dials to SHUTTLE. Place both search dials in the center position. (2) Check that left search dial display varies as shown to the right when turning left search dial clockwise. Check that display as shown to the right is obtained at fully clockwise rotation. The same change must appear also in counterclockwise rotation. (3) Check that turning of right search dial provides the same display change as left search dial. 3-4 (E)
�P2_Error� must appear on the right 7-segment display. Press the 
