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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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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+++++++++++++++++++++++++
FE-1A SELF DIAGNOSTIC SOFTWARE
The identification of errors within the FE-1A chassis is triggered in one of two ways :- 1: Busy or 2: Device failure to respond to IIC. In the event of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with continuous flashing LED) and then communicate with each device in turn to establish if a device is faulty. If a device is found to be faulty the relevant device number will be displayed through the LED (Series of flashes which must be counted) See Table 1., non fatal errors are reported using this method. Each time the software detects an error it is stored within the NVM. See Table 2.
Table 1
ERROR No error Not allowed (may be confused with Sircs response flash!) Protection circuit trip < ANY TIME > Reserved No vertical sync AKB IIC bus clock and/or data lines low at Power ON NVM no IIC bus acknowledge at Power ON Jungle controller no IIC acknowledge at Power ON Tuner no acknowledge at Power ON Sound processor no acknowledge at Power ON LED ERROR COUNT 00 01 02 03 04 05 06 07 08 09 10
How to enter into Table 2
1. 2. Turn on the main power switch of the TV set and enter into the �Standby Mode�. Press the following sequence of buttons on the Remote Commander.
i+
(ON SCREEN DISPLAY)
5
(DIGIT 5) (VOLUME -) (TV)
3.
The following table will be displayed indicating the error count.
Table 2
Error Times -
Flash Timing Example : e.g. error number 3
StBy LED ON ON ON
2 3 4 5 6 7 8 9 10
OFF
OFF
Note: To clear the error count data press �80� on the Remote commander.
6
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