Circuit Check Specifications - Zoom G2.1u Service Manual

G2.1u Circuit Check Specification
No. Items Ch
1 Current consumption
2 Power supply voltage 3.3VA
+3.3VD
+1.26VD
+8VA
3 Output level ( L )
(Load: 32ohms) ( R )
4 Frequency response ( L )
(No Load) ( R )
( L )
( R )
5 Noise level ( L )
(No Load) ( R )
6 Harmonic distortion ( L )
(No Load) ( R )
7 Function of D-MUTE ( L )
(DSP Mute) ( R )
8 Function of A-MUTE ( L )
(Analog Mute) ( R )
9 Battery warning voltage
10 Control input Foot sw_OFF
Foot sw_ON
Foot pedal_MIN
Foot pedal_MAX
11 System operation
* Conditions (if there is no note)
Power supply AC adaptor AD-0006
Input signal Sine wave to [INPUT] jack
Output load None (100 kilohms or more)
PHONES: 32 ohms
Specifications Inputs
190mA±20mA (FLASH uPU) Short
180mA±20mA (MASK uPU) Short
3.3V±0.15V Short
3.3V±0.15V Short
1.26V±0.05V Short
8.74V±1.0V Short
-1.5dBm±1.5dB 440Hz -20dBm
-4.5dBm±1.5dB 440Hz ±0dBm
+2.5dBm±1.5dB 20Hz -20dBm
-1.0dBm±1.5dB 20Hz ±0dBm
-16.5dBm±1.5dB 20kHz -40dBm
-20.0dBm±1.5dB 20kHz -20dBm
-80.0dBm or less Short
-90.0dBm or less Short
0.1% or less 440Hz -5dBm
0.1% or less 440Hz -5dBm
Check function of Mute 440Hz -20dBm
Check function of Mute 440Hz -20dBm
Check function of Mute 440Hz -20dBm
Check function of Mute 440Hz -20dBm
4.0V or less (Warning voltage)
4.6V or more (released warning)
0 FS-01
6-9 FS-01
6-9 FP-01
E3-FF FP-01
Make sure that keys, dial(11click), knobs, pedals, EEPROM, and LEDs including display and indicator normally operate.
Conditions/notes
Immediately after Test mode starts All LEDs are lit.
Immediately after Test mode starts All LEDs are lit.
Immediately after Test mode starts All LEDs are lit.
Immediately after Test mode starts All LEDs are lit.
Immediately after Test mode starts All LEDs are lit.
Immediately after Test mode starts All LEDs are lit.
Load=32ohms / Output waveform is not clipped.
Load=32ohms / Output waveform is not clipped.
Output waveform is not clipped.
Output waveform is not clipped.
Output waveform is not clipped.
Output waveform is not clipped.
Insert IHF-A
Insert IHF-A
Delay Mode / Insert 20KHz-LPF.
Delay Mode / Insert 20KHz-LPF.
Press "Type-" key and check muting on/off.
Press "Type-" key and check muting on/off.
Press "Down" key and check muting on/off.
Press "Down" key and check muting on/off.
Make sure that "bt" on display is blinked at 3.9V.
Make sure that the warning is released at 4.7V.
Make sure that "0" is displayed.
Make sure that value of "6-9" is displayed.
Make sure that value of "6-9" is displayed.
Make sure that value of "E3-ff" is displayed by hexadecimal.
s
Display and Indicator Keys pressed in "Test mode"
All lit None (Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
All lit None(Start up)
"2.P" "Type+" key(SW5)
"2.P" "Type+" key(SW5)
None "Type-" key(SW4)
None "Type-" key(SW4)
"mt" "Down" key(SW9)
"mt" "Down" key(SW9)
"bt" blinked
Return to normal status