TC Electronic ATAC, Service Manual

Page: 6 / 55

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TC Electronic A/S ATAC Service manual page 6
Built-in Test Program:
The ATAC has a Built-in Test Program. Use the program to narrow down problems
with keys, encoders, LED's etc.
To run the program; press UNDO while powering up.
Follow the instructions on the display.
To leave the Built-in Test Program; turn off power.
ATAC Built-in Test Program Version 1.01 has following tests:
1. Display
2. Midi connection (automatic, uses internal relay)
Notice: Midi functions are not implemented in software version 1.24 or lower.
3. Remote connection (automatic, uses internal relay)
4. Keys
5. Encoders (dial knobs)
6. LED's (indicators)
7. Voltages
The voltage labels refers to labels in schematics. Some voltages are attenuated to protect
the test circuit. When measuring manually, measurements must take place before the
attenuators (marked with dash lines in schematics) to match the above voltage limits.
Voltage limits in automatic voltage test:
Voltage label limits
U-PSIN: +7.5 to +15.5 VDC
U-REMIN: +4.7 to +5.1 VDC *
U+5V: +2.17 to 2.25 VDC
U-NEGATIV: -14.2 to -12.8 VDC
U-CONT: -8.67 to -7.83 VDC
U-BATT: +3.0 to +4.0 VDC
UCC-PCMCIA1: 0.0 to +0.3 VDC
UCC-PCMCIA2: +4.8 to +5.0 VDC
CC-PCMCIA3: +11.4 to +12.4 VDC
* U-REMIN will fail test, if D13 is removed. See part list.