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How do I perform a leakage current check for the DENON DRA-F101?
Before returning the DENON DRA-F101 to the customer, ensure that you perform a leakage current check or a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from the chassis to either side of the power cord is less than 460 kohms, the unit is defective.
How do I perform the idling current adjustment for the DENON DRA-F101?
For the setup, place the DENON DRA-F101 in an ordinary position, avoiding direct air flow from an air-conditioner or fan. Perform the adjustment at a temperature between 15 degrees Celsius (59 degrees Fahrenheit) and 30 degrees Celsius (86 degrees Fahrenheit). Set the VOLUME control fully counterclockwise to the minimum position. For the SPEAKER terminals, ensure they are open; do not connect the speakers or dummy loads.
For the adjustment procedure, follow these steps:
1. Remove the top cover of the DENON DRA-F101 and connect a DC voltmeter to the test points CX031 and CX032 of the POWER P.W.B.
2. Connect the power cord to an AC 230V outlet, and turn the POWER switch to ON.
3. Right after power on, adjust VR351 and VR352 so that the DC voltmeter reads 10 plus or minus 1mV.
4. After a 2-minute warmup, adjust VR351 and VR352 so that the DC voltmeter reads 10 plus or minus 1mV.
5. After a 10-minute warmup, adjust VR351 and VR352 so that the DC voltmeter reads 10 plus or minus 0.5mV.
How do I disassemble the DENON DRA-F101?
Follow these procedures to disassemble the DENON DRA-F101. Note that you should follow the procedures in reverse order when reassembling.
Top Cover: Remove 2 screws on both sides, and 5 screws on the rear.
Front Panel: (1) Remove 4 bottom screws from the Front Panel. (2) Remove 2 side screws from the Inner Panel. (3) Widen the Inner Panel as shown in the manual to release it from both hooks of the chassis.
Display P.W.B., Encoder P.W.B.: (1) Remove 2 knobs and 1 nut. (2) Remove 10 screws.
System Connector P.W.B.: Remove 2 screws.
Tuner Pack: (1) Disconnect the FFC. (2) Remove 3 screws.
Power P.W.B., Heat Sink: (1) Remove 4 screws. (2) Detach the Power P.W.B. and Heat Sink to the arrow direction.
Shield Plate, Back Panel, Main P.W.B.: (1) Remove 2 screws, 7 screws, and 1 screw to detach the Back Panel. (2) Remove 2 screws to detach the Shield Plate. (3) Remove 1 screw, 2 screws and release the P.W.B. holder to detach the Main P.W.B.
What are the specifications for the tuner section of the DENON DRA-F101?
The specifications for the tuner section of the DENON DRA-F101 are as follows:
| Reception frequency range | FM: 87.50 MHz to 108.00 MHz, AM: 522 kHz to 1611 kHz |
| Practical sensitivity | FM: 1.2 microvolts/75 ohms (12.8 dBf), AM: 18 microvolts |
| FM stereo isolation | 40 dB (1 kHz) |
| FM S/N ratio | Monaural: 74 dB, Stereo: 70 dB |
| FM harmonic distortion | Monaural: 0.3 percent, Stereo: 0.4 percent |
What are the specifications for the power amplifier section of the DENON DRA-F101?
The power amplifier section of the DENON DRA-F101 has a rated output power of 35W + 35W (4 ohms, DIN, 1 kHz, T.H.D. 0.7 percent). The output terminals support 4 to 16 ohms.
What are the general characteristics of the DENON DRA-F101?
The general characteristics of the DENON DRA-F101 include:
| SN Ratio (IHF A Network) | PHONO: 80 dB (at 5 mV input) (input terminals short-circuited), CD, DVD/AUX, TAPE, MD: 90 dB (SOURCE DIRECT: ON) |
| Frequency Response | 5 Hz to 80 kHz: +0.5, -3 dB (SOURCE DIRECT: ON) |
| Tone Control Adjustable Range | BASS: 100 Hz +/- 8 dB, TREBLE: 10 kHz +/- 8 dB, LOUDNESS: 100 Hz +8 dB, 10 kHz +6 dB |
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