Yamaha QL5 Service Manual

QL5/QL1
11 7
C. PHANTOM VOLTAGE (INPUT 1)
With No.2 and No.3 pins of XLR shorted and 10 kΩ load
connected between No.2 and No.1 pins, check that the voltage
is as follows when the +48 key is turned on.
Also, check that discharging starts immediately when the +48
key is turned off.
2-2. QL5: INPUT 17-32
→
OMNI OUT 1-16
QL1: INPUT 9-16
→
OMNI OUT 1-8
Parameters:
QL5: Input the analog signal from INPUT (XLR) of CH 17-32
and measure the signal output from OUTPUT of CH 17-32.
Assign OMNI IN CH 17-32 to OMNI OUT 1-16.
QL1: Input the analog signal from INPUT (XLR) of CH 9-16
and measure the signal output from OUTPUT of CH 9-16.
Assign OMNI IN CH 9-16 to OMNI OUT 1-8.
A. GAIN MIN
1 Gain
2 Distortion
3 Noise level
Parameters: Short the CH IN to be measured with 150 Ω.
4 QL5:
CH17‒32/QL1:CH9‒16
level difference
Confi rm the range of difference in the gain measured in item
1
above as follows.
5 Crosstalk between adjacent channels
Parameters: Turn on OMNI OUT of only one odd number
channel for output, turn off OMNI OUT of other
channels and measure the noise level of even
number channels next to the odd number channel
on both sides.
Short INPUT of the even number channels to be
measured with 150 Ω.
Perform the same check on the even number channels.
Input Frequency Input Level Prescribed Output Level Permissible Range
1 kHz +10 dBu +4 dBu +4±2 dBu
Input Frequency Output Level Permissible Range
1 kHz +22 dBu 0.01 % or below
Permissible Range
–80 dBu or below
5 QL5:
CH1‒16/QL1:CH1‒8
level difference
Confirm the range of difference in the gain measured in
item 1 above as follows.
6 Crosstalk between adjacent channels
Parameters: Turn on OMNI OUT of only one odd number
channel for output, turn off OMNI OUT of other
channels and measure the noise level of even
number channels next to the odd number channel
on both sides.
Short INPUT of the even number channels to be
measured with 150 Ω.
Perform the same check on the even number channels.
7 Maximum output
(QL5: OMNI OUT 1–16 / QL1: OMNI OUT 1–8)
Parameters: Assign only the built-in oscillator to OMNI OUT
1-16 (in case of QL5) or OMNI OUT 1-8 (in case
of QL1).
B. GAIN MIN
1 Gain (QL5: INPUT 1–16 / QL1: INPUT 1–8)
2 Distortion (QL5: INPUT 1–16 / QL1: INPUT 1–8)
3 Noise level EIN (QL5: INPUT 1–16 / QL1: INPUT 1–8)
Parameters: Short the CH IN to be measured with 150 Ω.
If the measured value is out of the above permissible
range,confi rm that “measured value – (Gain at 1kHz)
≦
-128”
is obtained.
4 Level difference (QL5:
CH1‒16/QL1:CH1‒8
)
Confirm the range of difference in the gain measured in
item 1
above as follows.
Input Frequency Output Level Permissible Range
Permissible Range(Distortion)
1 kHz +24 dBu +24±0.5 dBu 0.01 % or below
Input Frequency Input Level Prescribed Output Level Permissible Range
1 kHz –62 dBu +4 dBu +4±2 dBu
Input Frequency Output Level Permissible Range
1 kHz +22 dBu 0.02 % or below
Permissible Range
Within 2 dB
Permissible Range
–62 dBu or below
Permissible Range
Within1dB
Permissible Range
Within1dB
Input Frequency
Output Level
(Odd Channel)
Permissible Range
(Even Channel)
1 kHz +23 dBu
‒57dBu or below
Input Frequency
Output Level
(Odd Channel)
Permissible Range
(Even Channel)
1 kHz +23 dBu
‒57dBu or below
Permissible Range
DC 33.6 V — 36.1 V

Yamaha QL5 Specifications

General

DJ mixer	-
Product color	Black
Video capability	No
Channels quantity	72 channels
Supported sample rates	44.1, 48 kHz
Digital sound processing	- bit
Phantom power	48 V
AC input voltage	100-240 V
AC input frequency	50 - 60 Hz
Power consumption (typical)	200 W
Total Harmonic Distortion (THD)	0.05 %

Weight and Dimensions

Depth	563 mm
Width	828 mm
Height	272 mm
Weight	21800 g