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MARANTZ DR6000
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of MARANTZ DR6000 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 19 (click to view)
Key matrix lines The lines connected to pins 34, 35, 36 and 37 of the display controller act as matrix scanners. Without a key pressed, they maintain a low level. As soon as a key is pressed, the scanning line connected to that key puts out a scanning signal, which should look like the oscillogram below. This scanning signal goes via the pressed key to I/O port 4 of the display controller (pins 28 to 33). The display controller can now determine which key has been pressed. Without a key pressed, pins 28 to 33 of the display controller maintain a high level (+5V).
PM3392A

PM3392

Pin1 Pin3

CH1 5.00 V= CH2 5.00 V=

M TB20.0ms- 1.92dv ch2CL 96532121_033.eps 141099

+5V
Figure 7-7 TURN ANTI-CLOCKWISE

0V

The pulses created this way arrive at pin 16 and 17 of the display controller. The first pulse to arrive tells the controller the direction of the rotation. Counting the pulses reveals the amount of rotation. Combining and decoding this information, the display controller will execute the appropriate task.

CH1!2.00 V=

MTB5.00ms

ch1+
CL 96532121_031.eps 141099

Push button operation This button connects to the key matrix lines and thus the operation is identical to the ordinary keys. Without being pressed, pin 4 of the easy jog maintains the low level, pin 5 the high level. When pressed the scanning signal goes through the
closed contact of pins 4 and 5, and can be checked at both pins.

Figure 7-5 KEY MATRIX SCAN LINE

Easy jog knob
Rotary operation The easy jog knob (SY26) incorporates a whole heap of user control possibilities in just one knob. Without the knob being operated, pin 1 and 3 of the knob (and thus pin 16 and 17 of the display controller), maintain the +5V level. Turning the knob clockwise briefly connects pin 1 to GND followed by pin 3.
PM3392

IR receiver - remote control In the DR6000 the IR receiver ZY01 is mounted on the display board. In all versions the IR receiver connects to the display controller. The signal coming from the receiver can be checked at pin 22 of the display controller. This signal is normally high (+5V). When the remote control is being operated, pulses mixed in with the +5V can be measured. The oscillogram gives an indication of how the signal looks like with the RC being operated.

Pin1 Pin3
PM3392A

+5V

CH1 5.00 V= CH2 5.00 V=

0V
MTB20.0ms- 1.92dv ch2CL 96532121_032.eps 141099

1

Figure 7-6 TURN CLOCKWISE Turning the knob anti-clockwise briefly connects pin 3 to GND followed by pin 1.
CH1!2.00 V= MTB20.0ms ch1+
CL 96532121_034.eps 141099

Figure 7-8 IR RECEIVER SIGNAL

17

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