Crown Audio IQ-USM 810 - Manual (Page 25)

©2000 Crown International, Inc.
Maintenance 4-5
130447-1 Rev. A IQ-USM 810 Service Manual
Send: DA DT CT C1 55 0A CS; Get Control Port Analog
Input 12
Return String: DA DT AK CT C1 55 0C IN12 CS
Send: DA DT CT C1 56 0A CS; Get Control Port Analog
Input 14
Return String: DA DT AK CT C1 56 0C IN14 CS
Send: DA DT CT C1 57 0A CS; Get Control Port Analog
Input 16
Return String: DA DT AK CT C1 57 0C IN16 CS
Open drive to all Control Port Analog Inputs.
Use the following commands to verify all the analog
inputs are between $19 and $00:
Send: DA DT CT 81 54 0A CS; Get Control Port Analog
Input 9
Return String: DA DT AK CT 81 54 0C IN9 CS
Send: DA DT CT C1 54 0A CS; Get Control Port Analog
Input 10
Return String: DA DT AK CT C1 54 0C IN10 CS
Send: DA DT CT 81 55 0A CS; Get Control Port Analog
Input 11
Return String: DA DT AK CT 81 55 0C IN11 CS
Send: DA DT CT C1 55 0A CS; Get Control Port Analog
Input 12
Return String: DA DT AK CT C1 55 0C IN12 CS
Send: DA DT CT 81 56 0A CS; Get Control Port Analog
Input 13
Return String: DA DT AK CT 81 56 0C IN13 CS
Send: DA DT CT C1 56 0A CS; Get Control Port Analog
Input 14
Return String: DA DT AK CT C1 56 0C IN14 CS
Send: DA DT CT 81 57 0A CS; Get Control Port Analog
Input 15
Return String: DA DT AK CT 81 57 0C IN15 CS
Send: DA DT CT C1 57 0A CS; Get Control Port Analog
Input 16
Return String: DA DT AK CT C1 57 0C IN16 CS
4.6.13 DISPLAY TEST
Spec:
All LEDs and LED segments individually light.
Procedure:
Start the display test mode:
Send: DA DT CT 80 06 09 03 CS; Select test display
mode.
Verify display lights all LEDs according to the test pat-
tern. (See Section 4.9 for test pattern)
Stop the display test mode:
Send: DA DT CT 80 06 09 02 CS; Select test display
mode.
4.6.14 PUSHBUTTON TEST
Spec:
Pushbuttons operational.
Procedure:
Use one of the following two methods to test the three
front panel pushbuttons:
Method 1 (Manual Verification)
Hold in the “SEL” button and verify the IQ-USM 810
display cycles between the three display modes (pre-
set, address, and baud rate).
Use the “SEL” button to select the preset mode
Press the “
∧ ” button and verify the preset display in-
creases its number.
Press the “
∨ ” button and verify the preset display de-
creases its number.
Method 2 (Auto Verification)
Use the following IQ command to continually poll the
switch status object:
Send: DA DT CT C1 05 0A CS; Return button status
Return String: DA DT AK CT C1 05 0C BTN CS
Press the “SEL” button and very the object returns $01.
Press the “
∧ ” button and verify the object returns $02.
Press the “ ∨ ” button and verify the object returns $04.
4.6.15 REAL TIME CLOCK
Spec:
The RTC can be set, can be read, keeps time,
and power backup is operational.
Note: The real time clock Ucode object uses a four-byte time
code. The code is the number of seconds from 12:00AM on
January 1, 1970. The data bytes are returned least significant
first.
Example: For 3:34:14 PM on July 21,1999:
1999-1970 = 29 years =
29 years / 4 = 8 leap year days=
July 1 = (31+28+31+30+31+30)=
181 days =
21st = 21 days =
PM = 12 hours =
3:34:14 =
Time from 12:00 AM Jan. 1,1970=
932,744,054 converted to hex = $37988B76
$37988B76 broken into bytes, LSB first = $76 $8B $98 $37.
914,544,000 seconds
691,200 seconds
15,638,400 seconds
1,814,400 seconds
43,200 seconds
12,854 seconds
932,744,054 seconds
Note: The real time clock is powered from a 1 mF capacitor
(C25) when the unit is unpowered. This capacitor must be
charged above 2.2 volts for the real time clock to operate with-
out unit power. Normal charging time is 14 minutes. To fast
charge the capacitor short TP7 and TP8 for at least 4.2 min-
utes. Remove jumper prior to a power cycle to prevent dis-
charging the capacitor.