24
GM-8886ZT,8886ZT-91
ASL SECTION
Preset conditions
1. Set VR601 and VR602 around the center of the adjustable range.
2. Ground pins 3 and 16 of IC601.
Step Input
Output
Adjustment
No.
(MIC)
(Pin 22)
Adj.point
Spec.
Conditions
1
By using an oscillator, apply a sine
Observe the output at
VR602
1.3±0.3V
Pin 16:Ground
wave of 7Hz/3.6mV to the MIC
Pin 22 on a DC V meter
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
VR601
4.6±0.1V
Pin 16:Ground
wave of 7Hz/64mV 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
VR602
3.6±0.1V
Pin 16:Ground
apply a sine wave of 7Hz/100dB-SPL Pin 22 on a digital
Pin 3:Open
directly to the MIC.
multimeter.
5
End
To connect the Amp unit and the DSP unit, use Jig GGD1153.
VR602
VR601
DSP UNIT
MIC
DSP UNIT
Oscillator
600
Ω
DC V meter
Digital multi
meter
CN903
CN902
CN901
WF+
L-
TLMT
R+
R-
BUS-
BUS+
FL-
GND
FL+
ACC
WF-
L+
RL+
RR-
SGND
RR+
RL-
MUTE
GND
CN901
CN903
BU
DC Regulated
Power Supply
13.2V
13.2V
TOP VIEW
BOTTOM VIEW
AMP UNIT
22pin
FR-
FR+
Summary of Contents for CRT2242
Page 5: ...5 GM 8886ZT 8886ZT 91 5 6 7 8 5 6 7 8 D C B A A A b A B ...
Page 6: ...6 GM 8886ZT 8886ZT 91 1 2 3 4 1 2 3 4 D C B A PD5452A HA12187FP A a A a A b ...
Page 7: ...7 GM 8886ZT 8886ZT 91 5 6 7 8 5 6 7 8 D C B A A a A a A b B B 7 13 0 93 13 87 ...
Page 8: ...8 GM 8886ZT 8886ZT 91 1 2 3 4 1 2 3 4 D C B A A a A b A b A ...
Page 9: ...9 GM 8886ZT 8886ZT 91 5 6 7 8 5 6 7 8 D C B A A b A a A b B ...
Page 11: ...11 GM 8886ZT 8886ZT 91 5 6 7 8 5 6 7 8 D C B A A SIDE A B CN905 ...
Page 12: ...12 GM 8886ZT 8886ZT 91 1 2 3 4 1 2 3 4 D C B A DSP UNIT A A ...
Page 13: ...13 GM 8886ZT 8886ZT 91 5 6 7 8 5 6 7 8 D C B A 2 3 1 SIDE B A ...
Page 14: ...14 GM 8886ZT 8886ZT 91 1 2 3 4 1 2 3 4 D C B A B B CN52 A AMP UNIT ...
Page 15: ...15 GM 8886ZT 8886ZT 91 5 6 7 8 5 6 7 8 D C B A SIDE A CN51 A B ...
Page 16: ...16 GM 8886ZT 8886ZT 91 1 2 3 4 1 2 3 4 D C B A B AMP UNIT B ...
Page 17: ...17 GM 8886ZT 8886ZT 91 5 6 7 8 5 6 7 8 D C B A SIDE B B ...
Page 23: ...23 GM 8886ZT 8886ZT 91 6 ADJUSTMENT Jigs GGD1153 ...
Page 25: ...25 GM 8886ZT 8886ZT 91 NJM78M08FA TA8221AH1 7 GENERAL INFORMATION 7 1 IC ...
Page 26: ...26 GM 8886ZT 8886ZT 91 PD2055A ...
Page 30: ...30 GM 8886ZT 8886ZT 91 7 3 EXPLANATION 7 3 1 BLOCK DIAGRAM A B ...
