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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+++++++++++++++++++++++++
A-107
1. CONTRAST OF MISCELLANEOUS PARTS
NOTES : ÷ Parts marked by � NSP � are generally unavailable because they are not in our Master Spare Parts List. ÷ The mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. ÷ Reference Nos. indicate the pages and Nos. in the service manual for the base model. ÷ When ordering resistors, first convert resistance values into code form as shown in the following examples. Ex. 1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J = 5%, and K = 10%). 560 � = 56 � 10 1 = 561 ................................................... RD1/4PU 5 6 1 J 47k � = 47 � 10 3 = 473 .................................................. RD1/4PU 4 7 3 J 0.5 � = R50 ...................................................................... RN2H � 5 0 K 1 � = 1R0 ......................................................................... RS1P 1 � 0 K When there are 3 effective digits (such as in high precision metal film resistors). 5.62k � = 562 � 10 1 = 5621 ........................................... RN1/4PC 5 6 2 1 F
Ex. 2
CONTRAST TABLE
A-107/MLXJ, MYXJ/EW, MYXJ/GR and A-207/MLXJ are constructed the same except for the following:
Part No. Ref. No. Mark Symbol and Description A-207 MLXJ
AWG7012 AWX7121 AWX7122 AWM7355 AWX7112 AWX7113 AWX7114 AWX7116
MLXJ
AWG7011 AWX7121 AWX7120 AWM7353 AWX7112 AWX7113 AWX7114 AWX7111
A-107 MYXJ/EW
AWG7011 AWX7121 AWX7120 AWM7353 AWX7112 AWX7113 AWX7114 AWX7111
Remarks MYXJ/GR
AWG7011 AWX7121 AWX7120 AWM7353 AWX7112 AWX7113 AWX7114 AWX7111
NSP P5 - 2 P5 - 1 NSP P5 P5 P5 P5 6 4 5 7
PCB ASSEMBLIES CONTROL ASSY FRONT R ASSY FRONT L ASSY AF COMPLEX ASSY VOLUME ASSY AC PRIMARY ASSY HEADPHONE ASSY AF ASSY PACKING Operating Instructions (Engkish/Spanish/Chinese) Operating Instructions (English) Operating Instructions (German) Operating Instructions (French/Spanish/Italian/Dutch/ Swedish/Portuguese) Packing Case Warranty Card EXTERIOR SECTION Fuse (FU1 : 1.25A) Fuse (FU1 : 0.8A) Power Transformer (T1 : AC220�230V) Rear Panel Insulator Screw Front Panel
�
NSP
�
P3 - 1 P3 - 1 P3 - 1 P3 - 1
ARE7158 Not used Not used Not used
ARE7158 Not used Not used Not used
Not used ARB7137 ARC7178 ARC7179
Not used Not used ARC7178 Not used
P3 - 5 NSP
AHD7562 Not used
AHD7560 Not used
AHD7559 ARY7009
AHD7559 ARY7009
P5 - 8 P5 - 8 P5 - 11 P5 - 13 P5 - 14 P5 - 16 P5 - 38
REK1023 Not used ATS7190 ANC7642 AMR7198 ABA1027 AMB7492
Not used REK1021 ATS7192 ANC7637
Not used REK1021 ATS7192 ANC7620
Not used REK1021 ATS7192 ANC7620 PNW2766 BBZ30P080FZK AMB7491
AMR7198 PNW2766 BBZ30P080FZK BBZ30P080FZK AMB7491 AMB7491
Note �: Refer to � 7 CONTRAST OF PCB ASSEMBLIES � and � 2. SCHEMATIC DIAGRAM �.
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