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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+++++++++++++++++++++++++
THE SPEAKER WIRES CONNECTING
(1) UC model POWER TERMINAL THE SPEAKER TERMINALS
Three-channel mode, two-way system The speaker output mode can be two-chan-
GM-222
18
� Be sure to use the special red battery wire nel (stereo), one-channel (mono), or three-
supplied with the amplifier and connect directly to channel (stereo + mono). To connect the battery. Use the supplied black ground wire by about 10 mm and twist it using speaker leads to suit mode. Connect the and connect to the vehicle body. nippers or a cutter.
1. Expose end of the speaker wires
speakers according to figures on the following pages. 1. Pass battery wire from the Twist C1
Mid-high (Left)
engine compartment to the interior
connect the RCA output.
� When connecting to the speaker input, do not
10 mm Woofer (Mono)
of the vehicle.
L1 � When connecting to the RCA input, do not C1 Mid-high (Right)
� After making all other connections to the connect the speaker input. amplifier to the positive (+) terminal of
Fig. 13
amplifier, connect the battery wire terminal of
Two-channel mode (stereo)
Three-channel mode, three-way system compartInterior of
C1 (Left)
2. Attach lugs to speaker wire ends.
the battery. (Right) � Use pliers, etc., crimp lugs to wires. Fig. 19 Fuse (30A)
the vehicle Positive terminal
L2 C2 Insert the O-ring rubber
Engine Speaker input Lug (Left) ment
High/mid-high Speaker wire hole into the
Drill an 8-mm Fig. 14 Mid/mid-bass
grommet into the vehicle vehicle body. body. (Left) Woofer/sub-woofer 3. Connect speaker wires to the � Fix speaker wires securely with the termiMid/mid-bass High/mid-high One-channel mode (mono) screws. Speaker input Power terminal System remote � The inductor (L1 or L2 in the diagram) terminal (Left) control terminal Speaker Fig. 11 speaker terminals. (Mono) (Right)
(Left)
L1
2. Connect wires to the terminal. nal screws. Fig. 17 (Right)
L2 C2
� Fix wires securely with the terminal UC model:
GND terminal (Right) Fig. 20
(Right) Terminal screw
acts as a low-pass filter. The capacitor
control wire (Blue) Speaker output on the woofer/sub-woofer, and that a Speaker wire terminal capacitor (C) shall be used on the
(C1 or C2 in the diagram) acts as a highpass filter. The inductor (L) shall be used System remote high/mid-high.
Speaker (Mono) � Remember when bridging an amplifier it Ground wire Fig. 15
Battery wire Three-channel mode (stereo +
ES and EW models: impedance. Therefore, you must use speakers that have ratings of 4 ohms or The power amplifier is basically a twoFig. 12
Fig. 18 will see only half of the original speaker
Terminal screw mono)
lower impedance ratings it may cause
� When the inductors and capacitors are combining the stereo and mono modes
Speaker wire
higher. If you use speakers that have channel/one-channel bridgeable amplifier, damage to the amplifier. but three channels can be achieved by using inductors and capacitors. connected to the speaker wires, secure or Speaker output
solder them so they cannot be pulled
terminal
loose. Tape or use heat shrink on the joints to prevent short circuits. Fig. 16
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