TRACE ELLIOT V-TYPE V8, Руководство по обслуживанию

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2
Sine wave tests
10) Insert 1Khz, -20dBu (77mVrms) sine wave into the PASSIVE INPUT .
Turn up GAIN I fully then adjust MASTER until the output starts to clip.
Check the power is >400W (40vrms @ 4
Ω Ω
) and the EM84 display valve is fully lit.
Using screwdriver handle gently tap each valve and check for microphony and instability.
11) Switch to HALF POWER mode. (on rear panel)
Check there is a reduction in output power (~25vrms @ 4
Ω Ω
) . Return to FULL POWER .
12) Turn GAIN I back to half way. Insert sig. gen. lead into ACTIVE INPUT and then back into
PASSIVE . Check that when in ACTIVE the output level approximately halves.
13) Press BRIGHT , signal should increase slightly.
14) Pull out GAIN II . Check signal on scope is as shown:-
Adjust GAIN II & LEVEL controls to check smooth operation.
Return to half way.
15) Push DEEP . Signal should increase slightly. Push out again.
16) Turn TREBLE , MIDDLE & BASS to minimum.
Turn BASS to maximum, check signal on scope:-
Return to minimum.
17) Turn MIDDLE to maximum, check signal on scope:-
Return to minimum.
18) Turn TREBLE to maximum, check signal on scope:-
Return controls back to half way.
Push in GAIN II . Signal should be clean again.
19) Switch on COMPRESSOR , signal should increase slighlty.
Turn up LEVEL , the blue LED should be lit just before full.
Turn off COMPRESSOR , blue LED should fade out.
Rear Panel
20) Check that none of the rear LED’s are lit.
Using a screwdriver remove each fuse, one at a time. Check each LED lights up.
21) Check correct functionality of 2 way foot switch socket.
Tip should switch from GAIN I to GAIN II , ring switches COMPRESSOR on/off.
22) Check there is an output at the correct level from the following sockets:-
DI OUT – (POST/GROUND) ~20mV p/p
DI OUT – (PRE/GROUND) ~350mV p/p
LINE OUT ~1.2V p/p
SEND ~200mV p/p
23) Turn MASTER control to minimum and switch unit to STANDBY .
Connect output to appropriate speaker cabinet and bass guitar
Aurally test main features of each channel and check for any excessive hum or noise.
24) Connect to load & sig. gen., set up for full power and soak test for approx. 30 minutes.
End of test.