59
KEX-M8196ZT,M8196ZT-91,M8396ZT-02,M8396ZT-92
ASL ADJUSTMENT
Preset conditions
1. Set VR301 and VR351 around the center of the adjustable range.
2. Ground pins 3 and 16 of IC301.
Step Input
Output
Adjustment
No.
(MIC)
(Pin 22 of IC301)
Adj.point
Spec.
Conditions
1
By using an oscillator, apply a sine
Observe the output at
VR351
1.8±0.3V
Pin 16:Ground
wave of 7Hz/2.0mV to the MIC
Pin 22 on a DC voltmeter
Pin 3:Open
terminal (+) via a 600-ohm resistor.
(pointer-type).
Wait for 20 seconds.
2
By using an oscillator, apply a sine
Observe the output at
VR301
5.2±0.1V
Pin 16:Ground
wave of 7Hz/20mV to the MIC
Pin 22 on a digital
Pin 3:Ground
terminal (+) via a 600-ohm resistor.
multimeter.
3
Repeat Steps 1 and 2 until doth adjustments satisfy the specifications.
4
By using the jig(CAN-906,CAN-912),
Observe the output at
VR351
5.2±0.1V
Pin 16:Ground
apply a sine wave of 100dB-SPL
Pin 22 on a digital
Pin 3:Ground
voltage directly to the MIC terminal.
multimeter.
5
End
DOLBY B/C NR ADJUSTMENT
No.
Test Tape
Adjustment Point
Adjustment Method
(Switch Position)
1
NCT-150
VR301(Lch),VR302(Rch)
mV Meter(2) : –8.24dBs+1.5dB,-0.5dB
(400Hz,200nwb/m)
(DOLBY NR Switch : OFF)
DC Regulated
Power Supply
VR351
VR301
MOTHER PCB
MIC
Oscillator
600
Ω
DC volt meter
Digital multi
meter
CN901
CN902
MUTE
GND
RL
CN901
SLD
13.2V
TOP VIEW
BOTTOM VIEW
22pin
MOTHER PCB
FL
FR
RR
BEEP
TEL
MUTE
SGND
AMPB
ANTB
ILL+
ILL-
BU
ACC
GND
MOTHER PCB
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