Power-Up Problems And Power-Up Self-Test Errors; Other Error Codes; Other Test Utilities; Field Test Mode Operation - Fender CYBER DELUXE Service Manual

Power-up Problems and Power-up Self-test Errors

At power-up, display is blank. Probable Host Processor (U28) boot/operation problem.
1. Check Host EPROM Socket and chip (U34) for wear, damage, or poor pin contact.
2. First check regulator devices and voltages. Inspect U17, U27, U19, U25 and associated parts. U17 pin 6
should be 0v (RESET). U17 pin 5 should be approx 5V (RESET(not)).
At power-up, a "Er" is displayed momentarily, "E3" is displayed. Probable DSP (U20) boot/operation problem.
The Host does not acknowledge response from the DSP processor communications port.
1. Press EXIT. The normal host prelude should be displayed. Change to another preset. If "Er" is
displayed, then "b2", then followed six sets of two characters (and repeats), the Host is O.K. and the DSP
processor is not operating, or communication is faulty.
2. Check DSP EPROM Socket and chip (U23) for wear, damage, or poor pin contact.
3. Check data and address lines between U20 & U23 for shorts due to foreign, conductive material.
Immediately after power up, a self-test error code is displayed.
or a Host-DSP communications problem. Note each error code, and press EXIT until errors are not longer displayed.
1. "Er", then "E1"
2. "Er", then "E2"
3. "Er", then "E3"
4. "Er", then "E4"
5. "Er", then "E6"

OTHER ERROR CODES

Customers may report an error code when invalid System Exclusive MIDI LOADS are attempted. The amp will
display "Er" momentarily, then "E8".
that the number of preset "packets" dumped is incorrect. The error code is a non-destructive event. The user can
press EXIT and continue using the amplifier.

OTHER TEST UTILITIES

For troubleshooting problems in the analog channels and the CODECs, it maybe useful to place the Amplifier into
Field Test Mode. This mode configures the analog channels for test conditions referred to on the service diagram. It
also contains built-in tests for the clean and distortion channels.
To invoke the Field Test mode, perform the following procedure:
Turn the test fixture power OFF. Press the MANUAL and COMP buttons simultaneously and hold while turning the
test fixture power ON. In this test mode, the Data Wheel is used to select one of ten test setups, displayed as "t0"
through "t9".

Field Test Mode Operation

In the Field Test Mode, the amplifier is configured with audio "pass through" conditions, which means the tone
controls, effects, and timbre filters are removed form the path. Gain, Volume, and Master settings are set up
automatically for each test setup, "t0" through "t9". The built-in tests automatically perform a "frequency sweep" test
of
CYBER DELUXE
Host EEPROM Error. Check U26 device and lines.
Host SRAM Error. Check U32 device and lines.
Host-DSP Comm Error. Check DSP Processor (U20) and U23 device
and lines.
DSP Self-Test Error. Check DSP Processor (U20) device and lines.
DSP SRAM Error. Check U22 device and lines.
This indicates that the SysEx MIDI information is not in the expected format, or
Probable localized memory device problem,