ALLEN & HEATH ZED 14 2 - Headphone Amplifier Protection Update; HF Instability on Mono I;P Fix

ALLEN&HEATH ZED 14 service manual AP7176 Issue 4 Page - 5 - of 11
HEADPHONE AMPLIFIER
PROTECTION [RECN1518
Implemented from serial number
Z142120x086111
To protect headphone amp
compnents from damage when
headphone jack is inserted
slopwly. Also improves
headphone performance.
Resistor value changes on headphone/meter PCB 003-659.
Resistor Old Value New value
R23
10R 0R
R26 10R 75R
R27 10R 75R
HF INSTABILITY On Mono I/P
Implemented on Issue 5 mono i/p PCB 003-652. AG6744_5
Resistor value changes on mono i/p PCB 003-652.
Resistor Old Value New value
R22
0R 68R
Resistor Old Value New value
R23
10R 0R
R26 10R 75R
R27 10R 75R