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tres bon document
cela a permis de verifier la connection de l'ecran
merci
salutations
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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.
IL50
IL50 ADJUST BIAS PROCEDURE
(Mandatory when any output MOSFET transistors Q3,4,7,8 are replaced)
1. Amplifier should be unplugged and OFF. 2. Remove Amp assembly from cabinet; remove rear plastic cover if present. All wires exiting the cover can remain connected unless they will prevent you from removing the amplifier or accessing potentiometers on the Linear board PCB in the following steps. 3. Locate the Linear board assembly (PCB with the output transistors) 4. Adjust R11 and R27 fully Counter Clockwise. See diagram below. 5. Apply 120 VAC power to unit, Turn power switch ON. 6. Verify LED illuminates on the front gain control dial unless you have disconnected the plug. 7. Remove shorting plug on terminal J7 on Linear board, and insert current meter, set to the low mA range. 8. Verify initial current is less then 1 mA. 9. Adjust R11 Clockwise until current meter reads 5 mA + the initial current from step #8. 10. Adjust R27 Clockwise until current meter now reads 10 mA + the initial current from step #8. 11. Turn amplifier OFF. Disconnect AC power to unit. 12. Remove current meter; insert shorting plug back in terminal J7. 13. Replace cover (if present), wires if disconnected, and replace amplifier back into cabinet.
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