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tres bon document
cela a permis de verifier la connection de l'ecran
merci
salutations
;
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.
IC DESCRIPTION IC, MC68HC05P6SCD2776
Pin No. 1 2 3 4 Pin Name SYSTEM RESET WAKE UP SYSTEM AGC CONT INPUT SEL 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 AUD MUTE TIME SEL
________
ELECTRICAL ADJUSTMENT
I/O I I � I Initializes the system. Low input.
Description
Detects the key input and starts up the system. Low input. System selector (setting each model). High: 8RC-9. AGC control. High: OFF. Low: ON. High: TAPE. Low: MIC. Audio mute. Setting the recording time in the L/L mode. High: ON. Low: OFF. High: 10 sec. Low: 45 sec.
I/O I/O I O I/O I/O O I I/O � � I I I I I/O I I I � I I/O I/O I
RADIO/MIC DO DI SK CS ISD MOSI ISD MISO SCLK VSS VREF BAT IN PB/REC KEY STOP/REW KEY FF KEY ISD SS LED PB LED REC ISD RAC TCMP ISD INT OSC2 OSD1 VDD
System setting by selecting signal. High: RADIO (PAUSE). Low: MIC (OFF). Data input from EEPROM. Data output to EEPROM. System clock to EEPROM. System selector to EEPROM. Data output to ISD. Data input from ISD. System clock of ISD. GND. 0 V. Reference voltage to A/D converter. 3.3 V TYP. Battery voltage input. (for voltage identification). 8RC-9: BAT IN. PB/REC KEY input. 2/3 VCC PB. 1/2 VCC REC. STOP/REW KEY input. 2/3 VCC STOP. 1/2 VCC REW. FF KEY input. Low: FF. ISD system selector. PB LED. REC LED. ISD RAC input. Not used. ISD INT input. 2.0 MHz ceramic filter. 2.0 MHz ceramic filter. Power supply input.
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 $4.99 CRIC90 AIWA
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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