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IX-W9
Symptom
. Auto Wipe
operation is
abnormal
Mode:
Wipe
Manual/Auto:
Auto
* Check items on @ to @.
* Check that 1C69 pins 9, 12 are low, and output pins 10, 11 are always low,
.Speed control
is abnormal
. Switch operation
is abnormal
.No audio output
at any output
terminal,
.No audio output
at EFFECT MON.
and REC OUT
terminals (audio
out terminals)
(With BYPASS
both ON and
OFF)
.No audie output
at audio termi-
nals of Effect
Monitor and Rec
Out terminals
(When Bypass
is OFF)
|
.Audio fader
operation is
abnormal
Fade: Audio
Manual/Auto:
Manual
18 (No. 70053)
Impedance between
Apprex, 500 kohms to 0 kohm
NO:
eVR42 is defective.
{C58 pin 2 and
(Power OFF)
e Check the peripheral pattern.
VR42 center pin.
@ Input 1: Check connector CN35
@ Input 2: Check connector CN35
@ AUX
IN: Check connector CN3
e Check voltages and waveforms of all
transistor.
Emitter of Q70,
1070, Q71, 1071,
Q72, 1072.
(Channel to which
signal is input)
Input: -10.0 dB Vrms
~9.8
dBVRus
IC25 pin 1 (Rech)
@ Check voltages and waveforms in the
1C24 pin 7 (Lech)
©
:
vicinity of 1C25, 24.
: @ Check connectors CN32 and 30.
-10
dBVrRus
@ Check voltages and waveforms in the
vicinity of 1C26.
e Check connector CN9-2, and balance VR.
e Check that IC26 pin 1 (fade control pin)
is approx.1.0V.
: @Check voltages and waveforms of !C21
in/out pins 8,9 (Reh) and 1C23 in/out
pins 11, 10 (Lch).
@ Check gate No. 12 (pin 6), No. 10 (pin
12) according to "Switching Truth
Table'.
1C26 pin 5 (R)
-17 dBVrus
@ Check that 1C26 pin 1 is
1.0 V when
output is maximum, and is 4.8 V when
output is minimum.
e YES:
Check voltage in the vicinity of
1C26,
®NG:
Check connector CN21-1.
> Check @&.
1C26 pin 5 (R)
Max: -17 dBVRMS
Min: -80 dBVRMS or below
®@ Check voltages of 1C57 pins 5, 6 and 7.
(Voltage at 1C57 pin 5 is approx. 5.5 V
when Fader ON, and 0.7 V when
Fader
off.)
DC 2.0 V (max) to 9.9 V (min)
Variable with manual VR
1C57 pin 7
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