TABLE OF CONTENTS
SAFETY INSTRUCTIONS ................................................................... 2
SAFETY PRECAUTION .................................................................. 2
PRODUCT SAFETY NOTICE ......................................................... 2
BEFORE ATTEMPTING SERVICE ................................................. 2
TABLE OF CONTENTS ...................................................................... 3
E1 THEORY OF OPERATION ............................................................ 4
RF BOARD...................................................................................... 4
Power........................................................................................... 4
Input..................................................................................... 4
Distribution........................................................................... 4
Antenna Input............................................................................... 4
HF Section ................................................................................... 4
Signal Path .......................................................................... 4
Envelope Detection, AGC, and S-Meter............................... 5
Synchronous Detector......................................................... 5
FM (VHF) Section ........................................................................ 6
HF and FM Local Oscillator.......................................................... 7
BFO ............................................................................................. 7
Audio Selection............................................................................ 7
FRONT PANEL BOARD ..................................................................... 9
Power Supply............................................................................... 9
Processor Section/LCD Control ................................................... 9
Voltage Detection......................................................................... 9
Other Switching / Misc................................................................. 9
DC-DC Converter......................................................................... 9
Audio Filter................................................................................... 9
Tactile Switch Matrix.................................................................... 9
XM INTERFACE BOARD.................................................................. 11
Power Supply............................................................................. 11
XM Interface............................................................................... 11
ETON E1 ALIGNMENT PROCEDURE.............................................. 13
RF BOARD.................................................................................... 13
I. Preliminary Tests ................................................................. 13
A. Battery Input and Polarity Protection.................................. 13
B. External Power Jack Test.................................................. 13
C. Power Switching Test........................................................ 13
II. SW Mode Tests .................................................................... 13
A. SW Receiver Power........................................................... 13
B. First LO Alignment ............................................................. 13
C. SW Front End Bandpass Test............................................ 13
D. 45 MHz Crystal Filter Alignment......................................... 15
E. 2
nd
LO Adjustment.............................................................. 15
F. Main Reference Adjustment............................................... 15
G. I.F. Gain AGC adjustment .................................................. 15
H. S-Meter Full Scale Setting ................................................. 15
I. Synchronous Detector Alignment....................................... 16
J. BFO Test ........................................................................... 16
K. 1
st
Mixer Balance Adjustment............................................. 16
L. Final Recovered Audio Test............................................... 16
M. Sensitivity Test................................................................... 16
N. Telescopic (Whip) Antenna Sensitivity Test....................... 16
III. FM MODE .............................................................................. 17
A. Supply Switching Test........................................................ 17
B. LO Adjustment................................................................... 17
C. Front End Tracking Filter Alignment................................... 17
D. Detector Alignment ............................................................ 18
E. Discriminator Voltage Alignment........................................ 18
F. S-Meter Full Scale Setting ................................................. 18
G. Stereo Demodulator Alignment .......................................... 18
H. Final Recovered Audio Test............................................... 18
I. Squelch Test...................................................................... 18
J. Sensitivity Test................................................................... 18
K. Whip Input Sensitivity Test................................................. 18
IV. AUX MODE ........................................................................... 18
V. SAT MODE ............................................................................ 19
VI. MISCELLANEOUS TESTS ................................................... 19
AUDIO BOARD ............................................................................. 19
A. Main Output Amplifier Test................................................. 19
B. Tone Control Test, (Left Channel)...................................... 19
C. Tone Control Test, (Right Channel) ................................... 19
D. External Speaker Test....................................................... 20
E. Headphones Test............................................................... 20
FRONT PANEL BOARD............................................................... 20
A. Visual Inspection................................................................ 20
B. Voltage Checks.................................................................. 20
C. Backlight, Low Batt, and Battery Gauge Test..................... 20
D. Low and High Voltage Shutoff Test.................................... 21
E. Power Loss Detection Test................................................ 21
F. Squelch Indicator Test....................................................... 21
G. ìPC Time Base Adjustment............................................... 21
H. Controller Time base Measurement................................... 21
I. Auto Clock Set Audio Input Test........................................ 21
J. Preprogramming EEprom Memory..................................... 21
K. UNIT TO UNIT MEMORY TRANSFER.............................. 21
XM INTERFACE BOARD.............................................................. 22
A. Power Supply Switching and Regulation Test.................... 22
B. Power Supply Load Detection Test.................................... 22
C. Power Supply Current Limit Test ....................................... 22
D. Digital Interface Test.......................................................... 22
FINAL TEST ...................................................................................... 23
A. Inspect for appearance flaws............................................. 23
B. Verify operation from external power and from battery...... 23
C. Check each control and button.......................................... 23
D. Inspect display for cleanliness and backlight. .................... 23
E. Check each of the side connectors.................................... 23
F. Headphones (and headphones display indication)............. 23
G. Check for proper sound and loudness............................... 23
H. Verify that whip antenna is tightly mounted........................ 23
I. Spot test sensitivity on all bands........................................ 23
J. Test XM mode.................................................................... 23
ILLUSTRATIONS
Figure 1: Main Board Block Diagram ................................................... 8
Figure 2: Front Panel Board Block Diagram....................................... 10
Figure 3: E1 XM Interface Board Block Diagram................................ 11
Figure 4: Audio Board Block Diagram................................................ 12
Figure 5: .1 – 1 MHz (preamp off)..................................................... 13
Figure 6: .1 – 1 MHz (preamp on)..................................................... 13
Figure 7: 1 – 2 MHz (preamp off)....................................................... 14
Figure 8: 2 – 4 MHz (preamp off)....................................................... 14
Figure 9: 4 – 8 MHz (preamp off)....................................................... 14
Figure 10: 8 – 16 MHz (preamp off)................................................... 14
Figure 11: 16 – 30 MHz (preamp off)................................................. 14
Figure 12: 16 – 30 MHz (preamp on)................................................. 14
Figure 13: 45 MHz Crystal ................................................................. 15
Figure 14: VHF High (preamp off)..................................................... 17
Figure 15: VHF High (preamp on)..................................................... 17
Figure 16: VHF Low (preamp off)...................................................... 17
Figure 17: Main Board Test Points.................................................... 24
Figure 18: Main Board Adjustments.................................................. 25
Figure 19: Front Panel Board Test Points & Adjustments................. 26
Figure 20: Audio Board Connections & Adjustments ........................ 27
Figure 21: XM Interface Board Test Points ........................................ 28
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