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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+++++++++++++++++++++++++
SA-PT650P / SA-PT650PC
8.2.2.2.
TX-TYPE B / RX-TYPE 2
EEPROM
Note:
RF
RF
- FX65/FX66 SIGNAL FLOW - FX85 SIGNAL FLOW - ONE WAY AND SIMULTANEOUS - FX65/FX66 + FX85 - FX65/FX66 TRANSMITTER NOT USED, NEED TO IDSET FX65/FX66 - TX TYPE B BUT RX CHANGED FROM TYPE 2 TO TYPE 1, CH1 SIGNAL REDIRECTED TO DAC
BB
BB
ADC
ADC
MCU
DAC
CH2 IN
TX
CH1 IN
CH2 OUT
RX Type 2
Type B
· Type B transmitter uses two ADC (Analog to Digital Converter) to send audio streams from Channel 1 and Channel 2 for the FX65/FX66 surround sound and FX85 second room audio, respectively. Type 2 receiver outputs audio through Channel 2. The software multiplexes which channel to listen to by setting the baseband accordingly. For example, if the receiver is configured as an FX85 receiver (Type 2), the baseband is configured to accept Channel 1 audio transmission and redirect it to Channel 2 Out. If the receiver is set as an FX65/FX66 or wireless subwoofer, the baseband is configured to accept channel 2 audio transmission and redirect it to the same Channel 2 Out.
8.2.3.
Activation
· FX65/FX66 can be activated in the main unit by using either transmitter Type A or Type B and enabling surround sound by selecting Surround Music, DPL or Super Surround (Music/Movie). · FX85 Wireless feature is enabled by default when the user uses transmitter type B.
8.2.4.
LED Indication
· For FX65/FX66, there will be two-color LED that will be used to indicate Power On and Link. If link, the two-color LED will be green, else, it will be red. For FX85, the front panel will have LED indicators for Standby,, Wireless Link, Charge, Option and Music Port. During Power On, Standby LED will be OFF. Only during power OFF will this LED be ON (Red). Wireless Link indicator will be ON (Green) when link is established between TX and RX and OFF when link is lost. Pressing the selector button will toggle from any of the selector modes Wireless, Option and Music port. Only the currently selected mode will be ON (Green), the other two will be OFF. Charge LED will be ON (Red) once iPod charging is initiated.
8.2.5.
Key Operation (FX85)
· Selector Button This button will be used to select Wireless, Option or M.Port and enabling the corresponding LED indicators for each mode. During Power On, by default, selector mode is set to Wireless when power is initially supplied to the system. But during Power On/OFF button, it will remember the last selector mode setting. · Play Button This button will send command to the main unit to play CD/DVD as well as the iPod. This function is therefore meaningful only 27
MCU
EEPROM
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