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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 2 SERVICE NOTE
[Service Mode]
Mode which enables the mechanism to be operated with the MAIN board opened.
TP50
[MAIN Board]
AF oscillator + � 50K� TO PLUNGER FF ND701 REW TO MOTOR TP52 BATT SQUARE WAVE (SINE WAVE) 10Hz, �3.5dB BATT
1. Setting 1) Refer to �Disassembly� and remove the cabinet and open the MAIN board. 2) Connect the MAIN board to the motor and plunger using a jumper wire. Use �Extension tool (1-769-143-11) (one set 10 tools)� to make connection simple. 3) Short-circuit theTP52 and GND by soldering. 4) Turn OFF the BL SKIP switch. 5) Apply a square wave signal or a sine wave signal to TP52. (see the right figure) 6) Supply 1.3V to the battery terminals (+) and (�) using a stabilized power supply. 2. Preset State This state must be set to set the PLAY, FF, and REW modes. 1) Check that the lever (NR SW) is at the center and F/R switch (S701) is at the center. If not, set the preset state as follows. 2) Move the N/R switch (S701) according to the side faced by the lever (NR SW). 3) Turn OFF the stabilized power supply switch once and then turn it ON again so that the lever (NR SW) can be moved. Move the N/R switch (S701) according to this timing and set to the center. 3. FF REW Mode 1) Check the �2. Preset State� and press the FF switch and REW switch. 4. PLAY Mode 1) Check the �2. Preset State�. 2) Press the � switch. The lever (NR SW) will move to the F side once and then to the R side. Move the N/R switch (S701) according to this timing to set the PLAY (R side) mode. Press the � switch another time and move the N/R switch (S701) according to the movement of the lever (NR SW) to set the PLAY (N side) mode.
Note 1: If the above cannot be performed, start again from preset. Note 2: Use the remote control �, p, FF, and REW switches as much as possible. If the remote control is not available, do not touch switch with the hand and use something with a round tip to press them. Note 3: By using a headphone, the timing for moving S701 can be known by the beep.
� Side A � � Side B �
IC702 PH701 S701
N SIDE CENTER
R SIDE
[Lever (NR SW)]
Center R side Lever (NR SW) F side
�4�
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