Laney ChromeOzone User Manual - page 8
Laney
7
7
VALVE IDENTIFICATION
VALVE REPLACEMENT AND TROUBLE SHOOTING
VALVE REPLACEMENT AND TROUBLE SHOOTING
The valves in your new valve amplifier will eventually need replacing due to wear, this is normal with valve amps. In most instances
you should be able to effect valve replacement yourself without incurring the costs of a service engineer. Following are some of the
most likely symptoms of valve malfunction and a suggested method of correction.
Normally valve-amps give optimum performance when fitted with matched sets of output valves as factory fitted to all Laney valve
amps. NB: Damage will not occur by not fitting matched sets, although the amplifiers performance may be impaired.
SOLUTION 1
SYMPTOM 1
Check time delay POWER FUSE and replace if necessary:-
100-120 Volts T1.5Amp time delay
220-240 Volts T630ma time delay
Amp connections have been performed correctly but power light fails to illuminate.
SOLUTION 2
SYMPTOM 2
Power light illuminates, no sound output.
Check secondary HT fuse and if blown replace with T500ma time delay.
5: When using the BRIGHT SWITCH on the amplifier, keep in mind that it has a greater audible effect the lower the amount of
distortion produced by the pre-amplifier. At some distortion levels the BRIGHT SWITCH may appear to have no effect at all.
3
4
1
2
5
6
7
8
9
10
Pre Amplifier
input valves
6 x ECC83
Power Amplifier
output valves
4x EL84 matched quartet
VALVE FUNCTIONS
1. First-gain stage: Clean-channel.
2. Second-gain stage: Clean-channel.
3. First-gain stage: Drive-channel.
4. Second-gain stage: Drive-channel.
5. Third-gain stage: Drive-channel.
6. Power-driver stage.
7, 8, 9 & 10: 4 x EL84 Output-valves.
In the interest of continued product development BLT Industries reserves the right to change
the product specification without prior notice