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TC Electronic A/S
Gold Channel Service manual
page 5
Quick Trouble Shooting
Use this table to solve problems or find out what to do next. (check also the section; Software Changes, on page 14)
Symptom
Comments / Action:
Noise when using Mic. in
No output when using Mic. in
Update or replace the Mic amp board (P12905-x).
Please refer to service note no. 720 10 06 04 and 720 10 06 05 and 720 10 06 06 in appendix
Analog in/out fails
Update or replace the Mic amp board (P12905-x).
Please refer to service note no. 720 10 06 04 and 720 10 06 05 and 720 10 06 06 in appendix
Try with other cables or read section "Built-in Test program". Note: When analog in/out is connected to unbalanced
equipment, XLR pin 3 must be connected to pin 1.
Note: If IC35 or IC36 or IC41 is defective, they should be replaced with type MC33079
Note: In the Built-in test program it says "Meter must show -12dB.." However, if the meter only shows -16dB, it is also OK.
Cannot turn power off with power switch at front
The switch must be pressed for at least 1 second to turn off power. The delay provide unintended power off during recording.
Blank display. Cannot run application software.
Enter the SOFTWARE BOOT menu, by keeping ENTER button pressed at power on.
Dial option to INFO, press ENTER to check the application software. If corrupted; load the application software again.
Or try to run the self test prom, see section "Built-in Test program".
Lines or spots in display
Backlight is blinking
Make sure no external equipment is influencing the display, i.e. magnetic fields, hot fields. If the picture is still distorted,
replace the display. If the backlight is bad or blinking; check the soldering on the display itself, especially the two connections
going to the upper part of the display.
Message: "User Preset Error, Cleared All Presets"
Appears normally at first power on after RESET. All Presets are set to factory default!
Bad LED's, keys or Parameter/Value wheel.
See section "Built-in Test program".
Digital or Midi in/out fails
Try with other cables or read section "Built-in Test program". Digitech pedals are incompatible.
External Control In fails
Try with other cables or read section "Built-in Test program".
Check also the section; Software Changes, on page 14
Summary of Contents for Gold Channel
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