Zoom G2.1u Service Manual
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Zoom G2.1u Service Manual

Guitar effects pedal
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Summary of Contents for Zoom G2.1u

  • Page 2: Table Of Contents

    Contents Introduction .............................. 3 Controls and Connections......................... 4 Specifications ............................5 Block Diagram ............................6 Description of Block Diagram ......................... 8 Back Up User’s Data ..........................11 Function Test ............................13 Special Start-up ............................16 Recovering the Factory Default ......................17 Circuit Check Specifications ........................

  • Page 3: Introduction

    40 kHz, and input-converted signal-to-noise ratio is an amazing 120 dB, demonstrating the high level of performance achieved by the G2.1u. The G2.1u also has a USB connection and can be used as a direct guitar/computer interface.

  • Page 5: Specifications

    16-bit (stereo configuration for recording/playback) Sampling frequency: 32kHz, 44.1kHz, 48kHz Power requirements AC adapter 9V DC, 300 mA (center minus plug) (ZOOM AD-0006) Batteries Four IEC R6 (size AA) batteries, Approx. 7.5 hours continuous operation (alkaline batteries) Dimensions 165 mm (D) x 255 mm (W) x 79 mm (H)

  • Page 6: Block Diagram

    BLOCK DIAGRAM Digital In Digital Out McBSP 64Fs 6.USB 2.ANALOG SDRAM EMIF 1M x16bit ZFX-3 16bit BLOCK BLOCK McBSP Data Bus 256Fs Clock GPIO Foot SW/Ex-Pedal Ctrl In 24.576MHz 1.Power Supply Block BTT level Ex.Bus Port +3.3VA +3.3VD 11point EEPROM Linear-Reg.
  • Page 7 GUITAR Input -10dB Digital In Digital Out Pre Emphasis 3.CPU Block S/N:97dB 64Fs +14d CODEC 2.Analog Block AK4552 96kHz 24bit +6dB (USB) Output De-emphasis S/N:100dB +6dB data from USB data to USB +10dB De-Emphasis +10dB USB CODEC PCM2904 48kHz 16bit +0dB Pre-emphasis +0dB 6.USB Block...

  • Page 8: Description Of Block Diagram

    For headphone: 20 mW + 20 mW into 32-ohm load · Maximum output level +5 dBm · de-emphasis -16dB in 40kHz or higher · Frequency response Refer to the following figure. G2.1u Frequency response (Bypass) INPUT signal -10(dBm) 1000 10000...
  • Page 9 4) AD/DA converter: AK4552VT-E2 Sampling frequency 96 kHz System Clock (256fs) 24.576 MHz A/D 2-channel 64-times oversampling justified 24-bit resolution, MSB D/A 2-channel 128-times oversampling justified 24-bit resolution, LSB 3. CPU block 1) CPU uPD703015BYGC-A29-8EU 32-bit processing microprocessor (D163-0003) Internal ROM 128 Kbyte A/D converter 10-bit resolution, 8-channel Master clock 20 MHz 2) EEPROM:...
  • Page 10 4. Panel block STATIC KEY (x 7) STATIC LED (x 5) DINAMIC LED (x 6) ROTARY ENCODER (x3) 11 click VOLUME (x1) 7segment LED (x 1) All LEDs are lit under the control of the CPU. 5. USB Power Supply block USB Power Supply USB BUS Power ·...

  • Page 11: Back Up User's Data

    If necessary, back up the user’s effect patch data to avoid an accidental erasing. Required · User’s G2.1u as a transmitter (hereinafter referred to as “the transmitter”) · Another G2.1u as a receiver (hereinafter referred to as “the receiver”) · Jumper wires 1.
  • Page 12 7. Press the [TYPE +] key of the transmitter and make sure that the 7 segment LED lit “tx”. The indication flashes on and off at once. And the transmitter starts to send the data. When sending and receiving finish successfully, and hexadecimals including two dots such as [x.x.] appears on the display.

  • Page 13: Function Test

    Function Test After repairing, the inspection should be performed with the built-in program for inspection. ※ Equipment required · AC voltage meter (audio analyzer would be better) · IHF-A filter (audio analyzer might include it) · Oscillator · AC adapter (AD-0006) ·...
  • Page 14 7. SWITCH / LED check Press the [RHYTHM] key, and make sure that the 7segment LED is displayed [r h]. The [RHYTHM] key turn on and off by pressing the [RHYTHM] key. Press the [TAP] key, and make sure that the 7segment LED is displayed [t P]. The [TAP] key turn on and off by pressing the [TAP] key.
  • Page 15 Press both [▼]/[▲] foot switches together briefly and release, and start the tuner mode and the bypass state. Make sure that then the 7segment LED is displayed as [bp] and the G2.1u is available as the tuner. 17 USB interface operation Check Connect the unit to PC with USB cable and start up USB inspection software.

  • Page 16: Special Start-Up

    Special Start-up There are some methods to start up the G2.1u for service. To start up the unit, set the [POWER] switch to “ON” while holding any keys. The following table shows which keys are held down. Keys held down...

  • Page 17: Recovering The Factory Default

    Recovering the Factory Default In the factory default condition, the patches of the user area (A0-d9) contain the same settings as the patches of the preset area (00-39). Even after overwriting the user patches, their original content can be restored in a single operation (“All Initialize” function). If necessary, back up the user’s patch data.

  • Page 18: Circuit Check Specifications

    G2.1u Circuit Check Specification Items Specifications Inputs Conditions/notes Display and Indicator Keys pressed in "Test mode" Current consumption 190mA±20mA (FLASH uPU) Short Immediately after Test mode starts All LEDs are lit. All lit None (Start up) 180mA±20mA (MASK uPU) Short Immediately after Test mode starts All LEDs are lit.

  • Page 19: Circuit Diagram

    USB PCB 0.1u PH-7A (2mmP) open-c Title D164 MAIN PCB(PCB-5155) ANALOG circuit 1/7 G2.1u CIRCUIT DIAGRAM 8.2k 1500p Size Number Revision Z3A-0223-A3 MAIN PCB (ANALOG) PCB-5155A - 19 - Date: 14-Dec-2005 Sheet of File: C:\Documents and Settings\inoue\ƒfƒXƒNƒgƒbƒv\19-25-G2.1u Circuit.ddb Drawn By:...
  • Page 20 G2.1u CIRCUIT DIAGRAM MAIN PCB (CPU) PCB-5155A Title D164 MAIN PCB(PCB-5155) CPU circuit 3/7 D164 MAIN PCB(PCB-5155) ANALOG circuit 1/7 Size Number Revision Z3A-0223-A3 Z3A-0223-A3 - 20 - Date: 14-Dec-2005 Sheet of File: C:\Documents and Settings\inoue\ƒfƒXƒNƒgƒbƒv\19-25-G2.1u Circuit.ddb D164MP_cpusch Drawn By:...
  • Page 21 G2.1u CIRCUIT DIAGRAM SN74HCU04ANS MAIN PCB (DSP) PCB-5155 Title D164 MAIN PCB(PCB-5155) ANALOG circuit 1/7 D164 MAIN PCB(PCB-5155) DSP circuit 4/7 Size Number Revision Z3A-0223-A3 Z3A-0223-A3 - 21 - Date: 28-Dec-2005 Sheet of File: \\Server\PAT\‹Z p•”\Service Manual\G2.1u\Œ³ƒlƒ^\19-25-G2.1u Circuit.ddb Drawn By:...
  • Page 22 SW_RHYTHM SW10 ECA_LEVEL ECB_LEVEL 1104RTA-2 1104RTA-2 SW_TAP LED_TONE LED_LEVEL LED_RHYTHM FOOTSW-PCB PCB-5158 LED_TAP +3.3VD 20FMZ-ST Title G2.1u CIRCUIT DIAGRAM Size PANEL PCB (PANEL) PCB-5156 Number Revision Date: 14-Dec-2005 Sheet of - 22 - File: C:\Documents and Settings\inoue\ƒfƒXƒNƒgƒbƒv\19-25-G2.1u Circuit.ddb Drawn By:...
  • Page 23 AVSS 0.1u LED9 LED10 SW_SELECT IC400A SELECT ZH-0069:7Pin 2mmPich L=80mm NJM2100M SW400 AVSS 1104RTA-2 Title G2.1u CIRCUIT DIAGRAM Size Number Revision USB PCB (PEDAL) PCB-5160 Date: 14-Dec-2005 Sheet of - 23 - File: C:\Documents and Settings\inoue\ƒfƒXƒNƒgƒbƒv\19-25-G2.1u Circuit.ddb D164MP_pedal.sch Drawn By:...
  • Page 24 EXT2 100u/16V 470u/16V open-c 0.1u 0.1u 470u/16V PWM1 PWM2 + C81 300k-F XC9502B093AR 10u/16V Title G2.1u CIRCUIT DIAGRAM Size Number Revision MAIN PCB (POWER) PCB-5155A Date: 14-Dec-2005 Sheet of - 24 - File: C:\Documents and Settings\inoue\ƒfƒXƒNƒgƒbƒv\19-25-G2.1u Circuit.ddb D164MP_power.sch Drawn By:...
  • Page 25 R515 R514 IC501B 10u/16V NP 8.2k C525 1500p open NJM2100M R516 2200p C527 R517 Title G2.1u CIRCUIT DIAGRM Size USB PCB (USB) PCB-5160 Number Revision Date: 14-Dec-2005 Sheet of - 25 - File: C:\Documents and Settings\inoue\ƒfƒXƒNƒgƒbƒv\19-25-G2.1u Circuit.ddb D164MP_usb.sch Drawn By:...

  • Page 26: Harness

    Harness 120 mm Main PCB VR PCB: soldered ZH-0060 Flat Cable: B3B-PH-K-S(JST) 2mm-pitch 3pin 80 mm Main PCB SW PCB: soldered Flat Cable: B3B-PH-K-S(JST) ZH-0061 2mm-pitch 3pin 80 mm Main PCB 7Segment PCB: soldered B10B-PH-K-S(JST) Flat Cable: ZH-0062 2mm-pitch 10pin 80 mm Main PCB Pannel PCB...
  • Page 27 50 mm USB PCB PHOTO PCB: soldered ZH-0065 Flat Cable: B3B-PH-K-S(JST) 2mm-pitch 3pin 70 mm Main PCB USB PCB: soldered Flat Cable: ZH-0067 B3B-PH-K-S(JST) 2mm-pitch 5pin 200 mm Main PCB USB PCB: soldered B10B-PH-K-S(JST) Flat Cable: ZH-0068 2mm-pitch 7pin 80 mm Main PCB LED PCB: soldered...

  • Page 28: Device Pin Assignment

    BVSS P102/RTP2/A7 BVDD P103/RTP3/A8 P47/AD7 P104/RTP4/A9 P46/AD6 P105/RTP5/A10 P45/AD5 P106/RTP6/A11 P44/AD4 *Voltage Regulator /uPC29M33AT-E1 /NEC *DSP /SC63 /ZFX-3(1.26V, 3.3V) /IC10 /ZOOM /176P LQFP /IC2 +3.3V GPIO6 GPIO4 GPIO2/BOOTM2 *SDRAM GPIO1/BOOTM1 GPIO0/BOOTM0 /IS42S16100C1-7TL TIM1 TIM0 INT0 /ISSI CVDD DVDD INT1 INT2...
  • Page 29 G dp G dp - 29 -...
  • Page 30 EXT1 EXT2 PWM1 PWM2 -30-...
  • Page 31 Added IC for G2.1u *Digital Transistor *USB Codec /ROHM /Texas Instruments /DTC124EKA /PCM2904 /SC59 /28P SSOP /DT3 /IC502 SSPND D– DGND DGNDU TEST1 HID0 TEST0 HID1 CCXI HID2 AGNDX SEL0 SEL1 CCCI CCP2I AGNDC AGNDP CCP1I *FET /Onsemi /NTGS3441T1 /TSOP-6pin...
  • Page 34 PCB-5157 PCB-5158 Top Layer Top Layer Bottom Layer Bottom Layer...

  • Page 36: Exploded View

    No. PART NAME DROWING No. Q'ty 1 G2.1u_TOP_COVER Z2B-0170 2 G2.1u_BOTTOM_COVER Z2B-0171 3 G2 SWITCH BUTTON Z2B-0158 4 G2.1u SWITCH BUTTON R Z2B-0172 5 EX PEDAL SW BUTTON Z2B-0173 6 VR KNOB 1 Z2B-0160 7 VR KNOB 2 Z2B-0161 8 G2 SIDE COVER L Z2B-0162 9 G2.1u SIDE COVER R...

  • Page 37: Parts List

    Parts List ELECTRONIC PARTS LIST Main PCB PCB-5155A No. NAME SPECIFICATIONS DESCRIPTION REFERENCE No. Q'ty uPD703015BGC-A29-8EU LQFP-100pin Built in mask ROM for G2/4 (163-0002) ZFX-3 LQFP-176pin SDRAM IS42S16100C１-７TL TSOP-50pin EM636165TS-7G TSOP-50pin K4S161622H-UC60 TSOP-50pin AD/DA AK4552VT-E2 TSSOP-16pin IC15 EEPROM IS93C86A-3GRLI SOP-8pin 16kbit IC14 M93C86-WMN6P SOP-8pin 16kbit...
  • Page 38 56 Chip Resistor 330-J 1608(0603) 57 Chip Resistor 470-J 1608(0603) 58 Chip Resistor 620-J 1608(0603) R7 R30 R31 R32 R33 59 Chip Resistor 1k-J 1608(0603) R34 R44 R45 R46 R47 R54 R75 R86 R87 60 Chip Resistor 1.3k-J 1608(0603) 61 Chip Resistor 2.2k-J 1608(0603) 62 Chip Resistor...
  • Page 39 7seg PCB PCB-5157 No. NAME SPECIFICATIONS DESCRIPTION REFERENCE No. Q'ty 7SEGMENT LED E20561-GFOR DIP-18pin SEG1 TOD-5261BH-D-K DIP-18pin SEG1 R200 R201 R202 R203 R204 Resistor 1K-J 1/8W Pitch=7.5mm R205 R206 R207 Harness PH-10Y 2651#26/L=80MM ZH-0062: to Main PCB 10Pin 2mmPitch 80mm CN8B-CN8A PH10P L=80mm ZH-0062: to Main PCB 10Pin 2mmPitch 80mm...
  • Page 40 24 BATTERY SPRING (-) Z2A-0083 SWIC-F d=0.7mm (24) Same as G2 25 BATTERY SPRING (+/-) Z2A-0084 SWIC-F d=0.7mm (25) Same as G2 26 G2.1u LED LENS A Z2B-0179 ABS(CLEAR) (26) 27 G2.1u LED LENS HOLDER Z2B-0180 ABS(BLACK) (27) 28 BATTERY CUSHION Z2E-0190 sponge 73.4x10.2 T=7, with adhesive tape...

  • Page 41: Spare Parts Order List

    Spare Parts Order List ELECTRONIC PARTS The parts with ''*'' are available from G2.1u. Main PCB : PCB-5155A (PCB-5155) CODE No. NAME SPECIFICATIONS Q'ty PRICE(Japanese yen ) MICRO PROCESSOR SP02032 MPU uPD703015BGC-A29-8EU(D163-0003) SIGNAL PROCESSOR SP02033 DSP ZFX-3 MEMORY SP02034 SDRAM IS42S16100C１-７TL...
  • Page 42 PH3P 3Pin 2mmPich L=50mm CODE No. NAME SPECIFICATIONS Q'ty PRICE(Japanese yen) PCB ASSEMBLY FR-4 Double side pattern G2.1u MAIN PCB Assy (PCB-5155Awith Harness) FR-1 One side pattern G2.1u PANEL PCB Assy (PCB-5156, PCB-5157, PCB-5158, PCB-5159 with Harness) FR-4 Double side pattern G2.1u USB PCB Assy...
  • Page 43 G2.1u TOP COVER Z2B-0170 LOWER PANEL G2.1u BOTTOM COVER Z2B-0171 SIDE COVER SP02057 G2 SIDE COVER L Z2B-0162 G2.1u SIDE COVER R Z2B-0174 FOOT PEDAL EX PEDAL BASE Z2B-0175 EX PEDAL SHAFT GUIDE Z2B-0176 BKT PWB_PHOT Z2B-0178 EX PEDAL SPACER...

  • Page 44: Spare Parts Order Sheet

    To: ZOOM Corp. Overseas Sales Group page of Parts Order Sheet Code No. Product name Parts name Specifications Unit price ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥ ¥...

  • Page 45: Supplement: Identification Of Main Pcb

    Supplement: Identification of main Main PCB is common use for other production. Therefore, this main PCB has check box to identify which production will be used for. See below figure, it shows check box location on the main PCB (As of September, 2005).

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