Marantz MAR775 Easy jog knob, Rotary operation, Push button operation, IR receiver remote control

Page 20

PM3392A

 

 

 

+5V

 

 

 

0V

 

 

 

CH1!2. 00 V=

MT

B5.00m s

ch1+

 

 

 

CL 96532076_026.eps

 

 

 

290799

Figure 8-5 ‘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

Pin1

Pin3

CH1 5.00 V=

 

CH2 5.00 V=

MTB20.0ms- 1.92dv ch2-

CL 96532076_023.eps 290799

Figure 8-6 ‘Turn clockwise’

Turning the knob anti-clockwise briefly connects pin 3 to GND followed by pin 1.

PM3392

Pin1

Pin3

CH1 5.00 V=

 

CH2 5.00 V=

MTB20.0ms- 1.92dv ch2-

CL 96532076_022.eps 290799

Figure 8-7 ‘Turn anti-clockwise’

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.

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.

IR receiver - remote control

In the CDR570/930 the IR receiver RPM6934-V4 (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.

 

PM339 2A

 

 

 

+5V

 

 

 

 

0V

1

 

 

 

 

CH1! 2.00

V=

MTB20. 0ms

ch 1+

 

 

 

 

CL 96532076_021.eps

 

 

 

 

290799

 

Figure 8-8 ‘IR receiver signal’

18

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Contents Service Manual USA Europe / TradingBrazil AmericasPlayback & Recording and Disc CDR loader CDR main module CDL4009 or MAR770 This PCB contains the headphone socketTechnical Specifications GeneralESD IIIService Hints Service Tools Status of player Dealer modeDealer diagnostics Electrical service diagnostics Software versions, test for defective componentsMechanical service diagnostics DC-erase service mode Erasement of complete CD-RWFaultfinding trees CDR-ModuleCD-DA Disc Loaded CD R Wiring Power Supply Voltages Electrical Service Diagnostics CD-RW Disc LoadedDisplay no CD RWCheck Flex Connection from CDR Main Board Power Supply +3V3 AT IC7000 Pins 5,17,21,57, Check Safety ResistorsCD Module OPEN/CLOSECD Module Playback Display Board Description of display boardGeneral description Display controller TMP87C874FClock signal Control signalsTest instructions Supply voltagesIR receiver remote control Easy jog knobRotary operation Push button operationDisplay board troubleshooting guide Clock SignalControl Signals FTD Drive LinesPower Supply Unit P816 Description of P816Description of controller MC44603 Pin connectionsVCC Pin function descriptionPin Name Block diagram of MC44603 Operating description of MC44603Start up sequence of P816 Regulation of P816Ch1 Drain voltage Ch2 Drain current Ch3 Gate voltage Circuit description of P816 Troubleshooting P816 CD Main BoardMeasurements Block DiagramDescription Pin Configuration Input conditions conn 1006 pin Outputs conn Ucoil Vcoil WcoilTest points on driver Hallu Hallv HallwDC Settings HF PathTransfer Characteristics Hfdet SettingIIS CLK11 Nmute DAC Amplifier Wiring Diagram PinkWY01at conn.F934of WY02 WY03 WY04 CDR main board 10 D5V WC01at conn.1209 WC02at conn.140012V CD W801at conn.1500Block Diagram CDR Main BoardSchematic Diagram and Parts Location PY46Switching Power Supply PCB. P816 Q810 Q801 Q891 Q871 Q825 Q861 Q862 Q851 Q892QN54 QN53 QN58 QN57 Q311 Q681 QF52 QF51 QN52 QN51 QG56 QN55 QY01 QY02 QY04Exploded View and Parts List Packing Not Standard Spear PartsElectroly CAP Electrical Parts ListCeramic CAP P816-POWER Circuit Board P816-CAPACITORS P816-RESISTORSP816-SEMICONDUCTORS P816-MISCELLANEOUSPP16-REAR Panel Circuit Board PP16-CAPACITORS PP16-RESISTORPP16-SEMICONDUCTORS PP16-MISCELLANEOUSPY36-ROTARY Encoder Circuit Board
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