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tres bon document
cela a permis de verifier la connection de l'ecran
merci
salutations
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The manual was of good quality with high resolution schematic diagrams.
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The manual was very clear and contained all the information I was looking for. My dishwasher is working again because of this servicemanual!
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Quality scan, great manual. I solved my problem with this manual.
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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.
Higher Bits Hexadecimal 8 4 2 1 Bit b7 b6 b5 b4 Binary 0000 0000 0000 0000 0001 0010 0100 1000
Lower Bits Details Hexa8421 decimal When 0 When 1 b3 b2 b1 b0 0001 01 Emphasis OFF Emphasis ON 0010 02 Monaural Stereo 0100 04 This is 2-bit display. Normally 01. 1000 08 01:Normal audio. Others:Invalid 0000 10 Audio (Normal) Invalid 0000 20 Original Digital copy 0000 40 Copyright exists No copyright 0000 80 Write prohibited Write is allowed
Reading the Display: Convert the hexadecimal display of each digit into binary display. The several causes are added and displayed. Example When 84 is displayed: Higher bit: 8 = 1000 � b7 Lower bit: 4 = 0100 � b2 This example shows that �Emphasis: OFF�, �Monaural�, �Original�, �Copyright exists� and �Writing is allowed� because b2 and b7 are 1 while all other bits are 0. Example When 07 is displayed: Higher bit: 0 = 0000 � all 0 Lower bit: 7 = 0111 � b0+b1+b2 This example shows that �Emphasis: ON�, �Stereo�, �Original�, �Copyright exists� and �Writing is prohibited� because b0, b1 and b2 are 1 while all other bits are 0.
Hexadecimal � Binary Conversion Table Hexadecimal Binary Hexadecimal 0 1 2 3 4 5 6 7 0000 0001 0010 0011 0100 0101 0110 0111 8 9 A B C D E F
Binary 1000 1001 1010 1011 1100 1101 1110 1111
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