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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.
;
The manual was very clear and contained all the information I was looking for. My dishwasher is working again because of this servicemanual!
;
Quality scan, great manual. I solved my problem with this manual.
 ;
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.
CFD-S26L/S36L SECTION 4 MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened swab : record/playback head pinch roller erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer close to the erase head.) 3. Do not use a magnetized screwdriver for the adjustments. 4. The adjustments should be performed with the rated power supply voltage (9V) unless otherwise noted. Torque Measurement Mode FWD Torque meter CQ-102C Meter reading 2.95 � 6.86 mN � m (30 � 70 g � cm) (0.42 � 0.97 oz � inch) 0.15 � 0.53 mN � m (1.5 � 5.5 g � cm) (0.021 � 0.076 oz � inch) CQ-201B more than 5.88 mN � m (more than 60 g � cm) (more than 0.83 oz � inch) more than 5.88 mN � m (more than 60 g � cm) (more than 0.83 oz � inch)
SECTION 5 ELECTRICAL ADJUSTMENTS
TAPE SECTION 0 dB = 0.775 V
� Standard Output Level Output terminal load impedance output signal level � Test Tape Type WS-48A Signal 3 kHz, 0 dB Used for tape speed adjustment HP OUT 32 � 0.25 V (�10 dB)
Tape Speed Adjustment Procedure: Mode: playback
test tape WS-48A (3 kHz, 0 dB) 32 � set i jack (J321) digital frequency counter
FWD Back Tension
CQ-102C
FF
REW
CQ-201B
Adjust so that the value on the digital frequency counter is 3,000 Hz. Tape Tension Measurement Mode FWD Tension meter CQ-403A Meter Reading more than 100 g (more than 3.53 oz) Specification Value: Digital frequency counter 2,940 to 3,060 Hz Adjust so that the frequency at the beginning and that at the end of tape winding are between 2,970 to 3,030 Hz. Adjustment Location:
Tape speed adjustment control inside motor
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