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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.
SECTION 1 SERVICING NOTE
JIG FOR CHECKING BD BOARD WAVEFORM
The special jig (J-2501-124-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows. I+3V IOP TEO VC RF : : : : : For measuring IOP (Check the deterioration of the optical pick-up laser) For measuring IOP (Check the deterioration of the optical pick-up laser) TRK error signal (Traverse adjustment) Reference level for checking the signal RF signal (Check jitter)
Mechanism deck VC TEO IOP I + 3V CN110 RF
Jig (J-2501-124-A)
FORCED RESET
The system microprocessor can be reset in the following way. Use these methods when the unit cannot be operated normally due to the overrunning of the microprocessor, etc. Method : Disconnect the power plug, short-circuit the land of RESET.
[MAIN BOARD] (Conductor Side)
CN303 Short land IC401 TP (RESET)
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