11. Protection & Safety Circuits
11-1 Pr
HL-2.5KFX is equipped with ten protection circuits as shown in the table below.
Protections are commanded by the 16bit microprocessor chip, and DC drain
voltage (120 V) is cut off, when the protection circuit works. Also PROT lamp is lit
a
rough” state.
If PROT
t the shut down with OPER/STBY
switch. Reason for the shut down is displayed on LCD panel except for some
cases.
O
ER TEMP shut downs, turn the AC Power switch off
a
otection
Circuits
nd the amplifier becomes “th
lamp is blinking, you may rese
←
Example of LCD display
(In this case, over drive)
For VER VDD and OV
nd on to reset the amplifier.
No.
PROTECTI
CONDITION
RESET
REMARKS
1
O er drive
PROT OVER DRIV
ceeded 150 W
*1
OPER
2
B
Amp gain is less than five times
*1
OPER
Or when amp out of
order
3
O er current
PROT OVER ID
ID (drain) exceeded 35 A
*1
OPER
4
F q. Inhibit
PROT INHBT FREQ
Driven freq-ranged 26 to28 MHz
*1
OPER
FCC rule
5
Output power exceeded 1800 W
*1
OPER
6
Over P
R
eflected power exceeded 120 W
*1
OPER
7
Over Dissipation
PROT OVER Plos
wer dissipation exceeded
*1
OPER
Theoretical
8
O er Tj
PROT OVER Tj
Functon temp. reached 190
℃
*1
OPER
Theoretical calculation
9
Over voltage
Drain voltage exceeded 140 V
*2
AC POWER
10 Over heat
OVER
Heat sink temp reached 90
℃
*2
AC POWER
11 Fuse blown
OW
Fuse was blown
(F1, F2 of Unit 10)
Not resettable
Check Fan Control
Unit, Unit 10
*1: Reset OPER/STBY switch.
*2: Reset AC main POWER switch.
ON
LCD DISPLAY
Drive ex
v
and mis-set
PROT BAND-MISS
v
re
Over P
F
PROT OVER Pf
PROT OVER Pr
R
Drain po
2000 W
v
PROT OVER VDD
PROT
TEMP
PROT FUSE-BL
19
