I didn't realise a manual for an early plasma TV such as the one we were gifted could be so easily obtained. No manual was supplied with it, and as senior citizens we were a little puzzled over some aspects of its use. I do not want a listing for your store credit as we are not fairly big computer users. The manual was well organised, as it should be, with its backing of the Pioneer name. The download was prompt and everything worked quite smoothly. Thank you. Gordon.
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.
Text excerpt from page 21 (click to view)
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Flowchart of Failure Analysis for The Video-system Assy
A
DTV doesn't work
DTV
Digital broadcasting is not received. YES
< PDP-427XDA : Only >
Is any function which inputs signal selected with the input selector? YES Has the symptom settled when the Digital RF IN terminal and input cable are checked ? NO
NO
Select a designated input with the input selector.
YES
Poor contact of the terminal part or input cable is defective.
Is the power-supply voltage of CN4017 normal? YES
NO
Check between CN4017 and P3,P8 (Power Supply).
B
Is RESET_DT(IC8401 159pin) High? YES Do you communicate by TXD_DT(IC8401:103) and RXD DT(IC8401:102)? YES Is a signal output from CN4013? YES Is the signal input from CN4013 to IC8001? YES Has the symptom settled when the DTB Assy is replaced? NO Has the symptom been settled when the MAIN Ass'y is replaced? YES YES The DTB Assy is defective. Replace the DTB Assy. NO Check between CN4013 and IC8001. NO Check between IC8401(102,103) and CN4014. NG Replace Main Ass'y NO Check between IC8401(159pin) and CN4014.
