Zoom G9.2tt Manual de usuario

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Contents

Specifications ........................................................................................................................................... 3

Function Test ............................................................................................................................................ 5

Tube Adjustment Specification............................................................................................................... 17

Back Up User’s Data .............................................................................................................................. 24

Recovering the Factory Default ............................................................................................................. 26

Circuit Check Specifications .................................................................................................................. 27

Circuit Diagram ...................................................................................................................................... 28

Exploded view ........................................................................................................................................ 43

Parts List ................................................................................................................................................ 44

Spare Parts Order List ............................................................................................................................ 51

Spare Parts Order Sheet ..........................................................................................................................56

Supplement 1: G9.2tt optical sensor problem..........................................................................................57

Supplement 2: G9.2tt PEDAL SW Adjustment specifications................................................................61

Importance: Harness Fixing.....................................................................................................................63

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Specifications

Number of effect types 106 types

Number of effect modules 10 simultaneously usable modules

Patch memory User area : 5 patches x 20 banks = 100 (read/write enabled)

Preset area : 5 patches x 20 banks = 100 (read only)Total: 200

patches

Sampling frequency 96 kHz

A/D conversion 24-bit, 64-times oversampling

D/A conversion 24-bit, 128-times oversampling

Signal processing 32-bit

Frequency response 20 Hz - 40 kHz +1.0 dB, -3.0 dB (10 kilohm load)

Display 2-digit 7-segment LED display

16-digit 2-line backlit LCD

Inputs Guitar input Standard monaural phone jack

Rated input level: -10 dBm

Input impedance: 1 megohm

AUX input Mini phone jack (stereo)

Rated input level: -10 dBm

Input impedance: 10 kilohms

External Return Standard mono phone jack

Rated input level: -10 dBm/+4 dBm (switchable)

-4-

Outputs

Line output Standard monaural phone jack x 2

Rated output level: -10 dBm/+4 dBm (switchable)

Maximum output level: +19 dBm (into load impedance of 10

kilohms or more)

Output impedance: 1 kilohm or less

Headphone output Standard stereo phone jack

Rated output: 60 m W (into 32-ohm load), 20 m W (into 300-ohm

load)

Output impedance: 47 ohm

External Send Standard mono phone jack

Rated output level: -10 dBm/+4 dBm (switchable)

Tube circuitry 12AX7 x 2

Control connectors MIDI OUT, MIDI IN

USB interface

PC interface 16-bit (record/play, stereo)

Sampling frequencies 32 kHz, 44.1 kHz, 48 kHz

Power requirements 15 V AC, 1.5 A (from supplied AC adapter AD-0012)

Dimensions 235 (D) x 595 (W) x 85 (H) mm

Weight 5.5 kg

• 0 dBm = 0.775 Vrms

• Design and specifications subject to change without notice.

-5 -

Function Test

After the G9.2tt is assembled, the following inspections and settings should be made.

* Equipment required

· AC voltage meter (audio analyzer would be better)

· IHF-A filter (audio analyzer might include it)

· Oscillator

· AC adapter (AD-00012)

· Cables

●Set up before start up Test Mode.

* Adjust both [GAIN SW] (SW200) of OUTPUT and [GAIN SW] of EXT LOOP in -10 dBm.

* Adjust [OUTPUT LEVEL] (VR200) in MAX.

* Adjust both [TUBE] knob (VR201) of ENERGIZER and [BOOST] knob (VR202) of

ENERGIZER in 0 (turn counterclockwise extremely).

* Adjust [TUBE] knob (VR701) of ACCELERATOR in 5 (center) and [SOLIDSTATE] knob

(VR703) of ACCELERATOR in 5 (center).

1. Starting built-in inspection program.

Connect the AC-adapter.

(1)Turn on the "Power SW" while holding [AMP SELECT SYSTEM] key(SW5) and [EXIT]

key(SW19).

Or TP1 of the main PCB connect to the GND before power on. And then power will be turn on, the

set is running as Test Mode.

*AC adapter must be used AD-0012.

(2)After turning on the power, 7SEG LED will be displayed as [8.8.] and LCD, all of the SW, LED

will be ON.

*There is no sound comes out from OUTPUT in this status.

*To make sure that there is no broken or any no dark LED was found.

*After power turned on, the tube will be warm and bright.

(3)When any key will be pressed, the system will be start to DSP Download test mode.

This is the test for Test mode program downloading to the DSP.

This test methodology is comparing with the data which was written and the data which was read.

If in the case of successfully, LCD will be displayed as [DSP DOWNLOAD OK].

If in the case of fail, LCD will be displayed as [DSP DOWNLOAD NG]. If in this case all of the

testing after that will be ignored.

After holding display for 1sec, the LCD comes up all segments again, and then DSP can do a

signal processing.

(De-Emphasis and Emphasis circuit are working in this status.)

*After this the sound which is added from [INPUT] and [AUX IN] comes out from all [OUTPUT ]

(PHONE, L/MONO, R terminal).

When any key will be pressed, all LCD and LED will be off and then the system will be into

another test mode.

2. GAIN SW check

Following the operation “1.”, input sin wave (440Hz/-20dBm) to [INPUT] jack and monitor the

output from [OUTPUT] jack (L/MONO, R) with speakers and oscilloscope.

Make sure that output level changes by switching [-10dBm] and [+4dBm]. Then, output from

[Phones] jack doesn’t change.

*Refer to “Circuit Check Specifications” about the specs of output.

3. OUTPUT LEVEL check

Turn right [LEVEL] volume.

Input audio signal to [AUX IN] jack.

Make sure that outputs level from [PHONE] jack gradually changes by turning around the

[LEVEL] volume of output.

*Insert 32 ohm load.

*Make sure output level changes smoothly by turning volume knob.

*Refer to “Circuit Check Specifications” about the specs of output.

4. VERSION, REVISION, and CRC32 check

Press the [CHANNEL A] key (SW12), and make sure that the [CHANNEL A] key lights up.

Make sure that the LCD is displayed [G9 v1.01 R9031 CRC : 3D78B445] 4/18 present

Press the [CHANNEL B] key (SW13), and make sure that the [CHANNEL B] key lights up.

Make sure that the LCD is displayed [G9F v1.07 R8011 CRC : B2FF05EA].

However, this numbers are indicated only right after flash writing, and this numbers change if

some function like EX PEDAL setting or All Initialize is carried out.

4/18 present

*When it comes and there is no writing information (the contents of FLASH are empty), LCD is

displayed [Empty].



5. DIAL/VOLUME check

Turn the knob (DIAL/VOLUME) in the following table.

Make sure that the indications “01 ->02 -> 03 ... ->Fd ->FE ->FF” appear on the 7segment LED

display when the dial is turned clockwise, and that “FF ->FE ->Fd ... 02 -> 01 -> 00” when turned

anticlockwise.

And the LCD display is changed by every turning those knobs.

Table1. DIAL/VOLUME LCD display

DIAL/VOLUME LCD

[TYPE](SW30) TYPE

[PARM 1](SW31) PARM1

[PARM 2](SW32) PARM2

[PARM 3](SW33) PARM3

[PARM 4](SW34) PARM4

[AMP TYPE](SW35) AMP TYPE

[GAIN](VR1) GAIN

[LEVEL](VR2) LEVEL

[BASS](VR3) BASS

[MIDDLE](VR4) MIDDLE

[TREBLE](VR5) TREBLE

[PRESENCE](VR6) PRESENCE

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-7 -

6. SEND / RETURN check

Input sin wave (440Hz/-20dBm) to [INPUT] jack and [RETURN] jack, and monitor the output

from [OUTPUT] jack (L/MONO, R) with speakers and oscilloscope.

Then, insert to [RETURN] jack and pull from [RETURN] jack, and make sure that the LCD

display indicates [RETURN plugged].

Press the [PEDAL1 SETTING] key, and this key lights up red and the LCD display indicates

[PEDAL1 SETTING TUNER IN/RETURN]. Besides, by pushing the key repeatedly, the

7segment LED displays [tn], [rt] alternately.

When the 7segment LED displays [tn], input sound of [INPUT] jack is outputted from

[SEND] jack.

Then, make sure output sound changes by selecting [EXT LOOP] GAIN SW.

When the 7segment LED displays [rt], input sound of [RETURN] jack is outputted from

[SEND] jack.

Then, make sure output sound doesn’t change by selecting [EXT LOOP] GAIN SW.

7. DSP-MUTE check

Press the [AMP SELECT SYSTEM] key (SW5).

Make sure the [AMP SELECT SYSTEM] key lights red, and LCD is displayed [AMP

SEL/SYSTEM DSP MUTE].

Then, no sound comes L/MONO jack from [INPUT] jack.

By pushing key repeatedly, 7segment displays [on], [oF] alternately.

*The sound from [AUX IN] jack will be no change.

8. SDRAM check

Press the [BYPASS TUNER] key (SW15).

Make sure the [BYPASS TUNER] key lights red, and LCD is displayed [BYPASS/TUNER

SDRAM].

< delay check >

Input sin wave (440Hz/-20dBm) to [INPUT] jack and monitor the output from [OUTPUT] jack

(L/MONO, R) with speakers and oscilloscope.

*The output sound from [AUX IN] does not change.

Make sure that the delayed signal is output from the [L/MONO OUTPUT] jack and left channel of

[AUX IN] jack.

(Delay time is 0.5 seconds)

9. FLASH check

Press the [PAGE] key (SW17).

Make sure the [PAGE] key lights red, and LCD is displayed [PAGE].

Device check of FLASH is performed.

After a device check, if it is OK, LCD is displayed [Flash Write OK] and 7segment LED is

displayed [ok].

When a device check is not able to be checked, or there is fault, it is displayed [Flash Write NG].

*Make sure that there is no defect on the sound (abnormal noise .etc)

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10. ANALOG-MUTE check

Press the [STORE/SWAP] key (SW16).

Make sure that the [STORE/SWAP] key lights red, and LCD is displayed [STORE/SWAP

ANALOG MUTE].

The 7segment LED turns [on] and [oF] by pressing the [STORE/SWAP] key.

When the 7segment LED turns on, sound from [PHONE] jack, [L/MONO] jack, [R] jack, and

[SEND] jack are extremely low.

*Make sure that there is no defect on the sound (abnormal noise .etc)

11. USB-MUTE (SW) check

Press the [EXIT] key (SW19)

Make sure that the [EXIT] key lights red, and LCD is displayed [EXIT USB MUTE].

The 7segment LED turns [on] and [oF] by pressing the [EXIT] key.

*Make sure that there is no defect on the sound (abnormal noise .etc)

12. DIRECT-MUTE check

Press the [PEDAL2 SETTING] key (SW20).

Make sure that the [PEDAL2 SETTING] key lights red, LCD is displayed [PEDAL2 SETTING

DIRECT MUTE].

The 7segment LED turns [on] and [oF] by pressing the [STORE/SWAP] key.

When the 7segment LED turns on, output sound from [PHONE] jack is lower than

ANALOG-MUTE.

*The output sound is smaller than ANALOG-MUTE, during DIRECT-MUTE on.

*The output sound from [SEND] jack doesn’t change.

*Make sure that there is no defect on the sound (abnormal noise .etc)

13. SW/LED check

When press the key in the following table2, the pressed Key lights green.

Make sure that the indications [green -> red -> orange -> light off -> green -> red …] appear on

the press the key in the following table when it pressed repeatedly.

* Only [COMP] key (SW1), below all switches turn on if pressing that key.

Table2. SW LCD display

SW LCD

[COMP](SW1) COMP

[WAH/EFX](SW2) WAH/EFX

EXT LOOP (SW614) EXT LOOP

[ZNR](SW6) ZNR

[PRE-AMP](SW9) PRE-AMP

[EQ](SW4) EQ

[CABINET](SW7) CABINET

[MOD/EFX2](SW10) MOD/SFX

[DELAY](SW8) DELAY

[REBERB](SW11) REVERB

[TOTAL/FUNCTION](SW3) TOTAL/EFX CHAIN

-9 -

14. MIDI LOOPBACK check

Connect MIDI cable to [MIDI IN] and [MIDI OUT] (J401)

PUSH [HOLD MANUAL BANK↓] FOOT SW (SW22).

[HOLD MANUAL BANK↓] LED lights red.

LCD displays [MIDI LOOPBACK]. Confirmation of data transmission will be done.

If transmission is OK, LCD displays [MIDI LOOPBACK Success], 7 segment LED displays [ok].

Otherwise, LCD displays [MIDI LOOPBACK 00 timeouted], 7 segment LED displays [nG].

15. LCD CONTRAST check

Push [HOLD BYPASS/TUNER] FOOT SW (SW24).

[HOLD BYPASS/TUNER] LED lights red.

LCD displays [LCD CONTRAST 0123456789ABCDEF].

Check deepness of LCD contrast.

7 segment LED displays [01]-[04]. [01] presents most pale, [04] presents most deep, respectively.

16. CH A/B FUNCTION1 (SW) check

Press the [CH A/B FUNCTION1] FOOT SW (SW26).

Make sure that the [CH A/B FUNCTION1] LED lights green, and LCD is displayed [CH A/B

FUNCTION1].

The [CH A/B FUNCTION1] LED repeats [green -> red -> orange -> light off -> green -> red …]

by pressing the [CH A/B FUNCTION1] FOOT SW.

*Make sure that there is no defect on the sound (abnormal noise .etc)

17. TAP FUNCTION2 (SW) check

Press the [TAP FUNCTION2] FOOT SW (SW 628).

Make sure that the [TAP FUNCTION2] LED lights green, and LCD is displayed [TAP

FUNCTION2].

The [TAP FUNCTION2] LED repeats [green -> red -> orange -> light off -> green -> red …] by

pressing the [TAP FUNCTION2] FOOT SW.

*Make sure that there is no defect on the sound (abnormal noise .etc)

18. WAH/EFX1 (SW) check

Press the [WAH/EFX1] FOOT SW (SW21).

Make sure that the [WAH/EFX1] FOOT SW lights red, and LCD is displayed [TUBE

ENERGIZER].

The 7segment LED turns [on] and [oF] by pressing the [WAH/EFX1] FOOT SW.

*Make sure that there is no defect on the sound (abnormal noise .etc)

-10 -

19. INPUT CIRCUIT NOISE check

Push [PRE-AMP] FOOT SW (SW23)

[PRE-AMP] key lights red.

LCD displays [GAIN +60].

About this check, adjust [TUBE] of ACCELERATOR, [SOLID STATE] of ACCELERATOR,

[TUBE] of ENERGIZER, and [BOOST] of ENERGIZER to 5.

Make sure that noise level increases.

When 7 segment LED displays [on], DSP has +60dB gain and increase white noise of [OUTPUT]

jack (PHONE, L/MONO, R jack) and [SEND] jack sound.

By pushing key repeatedly, 7 segment displays [on], [oF] alternately, and at the same time DSP

gain will be on/off.

20. PRE EMPHASIS check

Push [MOD/EFX2] FOOT SW (SW25)

[MOD/EFX2] key lights red.

LCD displays [PRE EMPHASIS].

By pushing key repeatedly, 7 segment displays [on], [oF] alternately.

* When 7 segment displays [on], PRE-EMPHASIS is on by DSP

21. DE EMPHASIS check

Push [DELAY] FOOT SW (SW27).

[DELAY] key lights red.

LCD displays [DE EMPHASIS].

By pushing key repeatedly, 7segment displays [on], [oF] alternately.

* When 7 segment displays [on], DE-EMPHASIS is on by DSP

22. REVERB (SW) check

Press the [REVERB] FOOT SW (SW 629).

Make sure that the [REVERB] LED lights red, and LCD is displayed [TUBE ACCELARATOR].

By pushing key repeatedly, 7segment displays [on], [oF] alternately.

*The output sound doesn’t change by this operation.

*Make sure that there is no defect on the sound (abnormal noise .etc)

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