TC Electronic G-Force, Service Manual

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TC Electronic A/S G-Force Service manual page 14
Power On Sequence, continued
No Event Trouble shooting
6d TP68, 256FS starts up (11.2896MHz).
7 IC 15 pin59, DARC3 clock. Starts up (44.1KHz). IC15
8 TP5, Reset signal goes high. Battery connections, IC4
9 A: MPU, IC3 sets ports. B: The signal DSP RESET* is set low. C: SER MUTE is set to
low. D: Checks checksum in Flash. E: VCA left/right out is set to zero. Reload Boot Sector or replace the Flash, IC35.
10 MPU checks if the ENTER button is pressed If pressed; Boot menu appears. Check D8 if no picture.
11 MPU tests SRAM If reset or not OK; this message appears: "User Preset Error, Cleared All Presets ". Check
IC8, IC4 or battery.
12 MPU checks header in application software. If not OK; Boot menu appears. Try to reload application software
13 MPU checks if the BYPASS button is pressed If pressed; Reset menu appears.
14 MPU tests Preset information in SRAM If not OK; message appears: "Preset Error". Check IC8, IC4 or battery.
15 MPU, IC3 pin 107 goes high, (DSP RESET*) IC3 + soldering, see sequence picture in schematics for main board
16a MPU tests DSP If not OK; message appears: "DSP not OK"
16b IC 15 pin59, DARC3 clock goes from 44.1KHz to 80MHz IC15 + soldering
16c TP71, DA1_DATA starts up IC24
16d TP73, AD_DATA starts up IC39
17 Picture with "G-Force" and software version appears on the display. Front connection, display,
17 Picture with "Pitch Technology" appears on the display. Application software
18 RECALL picture appears on the display. Application software