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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!
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1. CONTRAST OF MISCELLANEOUS PARTS
NOTES:
A
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. Screws adjacent to mark on product are used for disassembly. 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 x 101 561 RD1/4PU 5 6 1 J 47k 47 x 103 473 RD1/4PU 4 7 3 J 0.5 R50 RN2H R 5 0 K 1 1R0 RS1P 1 R 0 K Ex.2 When there are 3 effective digits (such as in high precision metal film resistors). 5.62k 562 x 101 5621 RN1/4PC 5 6 2 1 F
CONTRAST TABLE
PDP-434PE/WYVIXK/1 and PDP-434PU/TUCK are constructed the same except for the following :
Part No. Ref. No. Mark
B P9 - 1 P9 - 5 P9 - 7 P9 - 8 P9 - 11 P9 - 12 P9 - 13 P9 - 13 P9 - 14 P9 - 14 P9 - 15 P9 - 18 > NSP PACKING Power Cord Code Case Warranty Card Mirror Mat Pad (PP B- L) Pad (PP B- R) Carton (43PU) Carton (43) Upper Carton (43PU) Upper Carton (43) Vinyl Bag Vinyl Bag S Mic Label (434PU CASE) REAR SECTION Name Label (43PU) Name Label (43PE) Caution Label Bolt Caution Label Terminal Label (PU) Terminal Label (PC) Mic Label (434PU PDP) FRONT PANEL SECTION Protect Panel Assy (43) ADG1215 AHC1041 ARY1138 AHG1284 AHA2343 AHG2344 AHD3193 Not used AHD3179 Not used AHG1310 AHG1338 AAX3045 ADG1214 AHC1049 ARY1114 AHG1327 AHA2317 AHA2318 Not used AHD3189 Not used AHD3188 AHG1326 Not used Not used
Symbol and Description
PDP-434PU TUCK
PDP-434PE WYVIXK/1
Remarks
*1
C
P19 - 3 P19 - 3 P19 - 4 P19 - 4 P19 - 5 P19 - 5
NSP NSP
AAL2467 Not used AAX3007 Not used AAX2997 Not used AAX3044
Not used AAL2480 Not used AAX3005 Not used AAX3006 Not used
*2
P21 - 5
AMR3303
AMR3345
Note: The numbers in the remarks column correspond to the numbers on the � EXPLODED VIEWS �.
EXPLODED VIEWS
� PACKING
Upper Carton
� REAR SECTION
Rear Case
*1
D
*2 *1
2
1 2
PDP-434PE
3 4
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