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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+++++++++++++++++++++++++
CD-323M/324M/DPF-J5020
CIRCUIT DESCRIPTION
3. TEST MODE
INPUT KEY Insert the AC plug to the wall outlet with pressing the SKIPDOWN key. PROCEDURE INITIAL CONDITION � Disc No.1 moves to the center and clamp it. � Clear the memory of the SRAM. � Door opens. � Set the switch of TIMER ON PLAY to ON. � Set the switch of SYSTEM CONTROL to XS8. CIRCUIT ADJUSTMENT � Open the door and load the disc to the Disc No.1. � Close the door. The unit chances to test mode �05� after clamping the disc. Change the mode 05(tracking-on) and 03 (tracking-off) alternately by the PLAY key. Stop the function. The pickup travels outwards. The pickup travels inwards. Shows the result of self-adjustment. 07 EF/FB à ó 08 TG/FG ó 09 FE/RF ó 10 TE/VC ìì Mode changes alternately by the RANDOM key. � Check the transmission signal (Disc No.1 and Track No.99) of the remote controller. *DPF-J5020, CD-324M only. Playback PGM signal of the Track No.7,13,23,30,34 and 41 in the order. And release Release the test mode. Check the switch position. Check the switch position. Check the SL16-TEXT port. �TxD : H - RxD:L, TxD:L - RxD:H� CHECK THE MECHANISM JAMMING. the order. Clamp the Disc No1,2,100,50,200 and 199 in the order. THE MECHANISM TEST MODE. Display shows NIAGARA until pressing any key. Change the mode 05 (tracking-on) and 03 (tracking-off) alternately by the PLAY key. Stop the function. Shows the result of self-adjustment. 07 EF/FB à ó 08 TG/FG ó 09 FE/RF ó 10 TE/VC ìì Mode changes alternately by the STOP key. Arm Motor Load operation. Arm Motor Unload operation. Rotary Motor Clockwise turning. Rotary Motor Counterclockwise turning. DISPLAY INITIAL OK!! MECH. INITIAL INITIAL NG TIMER, NG SER, NG TEST ON
Insert the AC plug to the wall outlet with pressing the REPEAT key PLAY/PAUSE STOP UP DOWN RANDOM
05 1 : 23
03 2 : 34
00 MOTOR FORWARD MOTOR REVERSE 07 XXX:XXX 08 XXX:XXX 09 XXX:XXX 10 XXX:XXX NG : blinking shows niagara mode
DISPLAY POWER
REPEAT CONFIRM (TIMER PLAY SW) (SL16/XS8 SW) (TxD port) Insert the AC plug to the wall outlet with pressing the UP key. Insert the AC plug to the wall outlet with pressing the RANDOM key. PLAY/PAUSE STOP
TIMER ON, TIMER OFF 16BIT, 8BIT
05 1 : 23
03 2 : 34
07 XXX:XXX 08 XXX:XXX 09 XXX:XXX 10 XXX:XXX NG : blinking MOTOR LOAD MOTOR UNLOAD MOTOR CW MOTOR CCW
UP DOWN RANDOM DISPLAY
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