Crestron qm-rmcrx-ba 用户手册

Crestron QM-RMCRX-BA   

         QuickMedia™ Receiver/Processor

 

Incorrect cable connections. 

Verify 15-pin output cable connection. 
Verify QM input cable connections. 

Video from RGB 
source is garbled 
or no output. 

Signal skew due to cable 
length or unequal pair length.

Verify maximum QM cable length and 
compensation for skew. 

Poor RGB or 
video image 
quality. 

Incorrect peak and/or boost 
setting. 

Adjust peak or boost controls till image 
quality is improved. 

Hum on audio. 

Grounding problem. 

Refer to note and diagram on page 19 
for ground wire connection 
instructions.  

QM input connector loose or 
not connected. 

Verify that QM input connector is 
securely plugged in. 

Room output (speaker) 
wire(s) loose or not 
connected. 

Verify that speaker wires connected to 
SPEAKER connectors are secure. 
 

Audio distorted 
or not present at 
room output. 

Improper hookup. 

Verify that you are not using the 
SPEAKER output and the AUDIO line 
outputs at the same time. 

Intermittent or no 
audio/mic output.

Incorrect peak setting. 

Adjust peak control until audio is 
restored. 

The System Monitor allows you to reload firmware into the QM-RMCRX-BA 
in the event that you cannot load the firmware in the normal mode. 

Perform the following procedure to correct the “System does not function” 
trouble situation (in reference to Corrective Action). 

If the system does not function, perform the following procedure: 

1.  Connect DB9 null-modem RS-232 cable between the PC and  

QM-RMCRX-BA COM port B. Refer to “Hardware Hookup”  
on page 17. 

2.  Open Toolbox and select Tools | Manage Address Book to access the 

port settings. 

3.  In the window, select RS-232 (Connection Type), 57600 (Baud Rate), 

N (Parity), 8 (Data Bits), 1 (Stop Bits), RTS/CTS On, XON/XOFF 
Off, and click OK.  

4.  Power down the QM-RMCRX-BA. 

5.  While powering up the QM-RMCRX-BA, press and hold ALT+K on 

the keyboard until the following text (or similar) appears in Toolbox. 

System Monitor [v1.001 (0001)] 

12-19-01 16:25:23 32MB RAM, 4MB FLASH 

CS> 

NOTE:  After this, you can increase the baud rate to 115200 (for faster 
communication) by pressing F8 on the keyboard and then selecting 115200 from 
the “Set Baud Rate” window. 

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