Vibra GZ II Series User manual


GZ II Series
Service Manual
SHINKO DENSHI CO., LTD.

Table of Contents
Chapter 1 Appearance............................................................................................1
1-1 Appearance of the Round Pan Type ............................................................................1
1-2 Appearance of the Square Pan Type ...........................................................................1
Chapter 2 Configuration of the Electric Components ..............................................2
2-1 Entire Wiring Diagram....................................................................................................2
Chapter 3 Troubleshooting......................................................................................4
3-1 Inspection Procedure.....................................................................................................4
3-2 Quick Reference Guide for Troubleshooting.................................................................5
3-3 Initial Inspection.............................................................................................................7
3-4 Inspection of the Electrical Components.......................................................................8
Chapter 4 Adjustment and Setting Procedures.....................................................12
4-1 Span Adjustment (CAL) ...............................................................................................12
4-2 Corner Error Adjustment..............................................................................................13
4-3 Coefficient Data Correction and Linearity Adjustment Procedures.............................14
4-4 How to Check (Enter) the Coefficient Data..................................................................15
4-5 LinearityAdjustment ....................................................................................................17
Chapter 5 Replacement Procedures.....................................................................18
5-1 Procedure for Replacing the Mechanical Sensor Assembly.......................................18
5-2 Procedure for Replacing the Tuning Fork Assembly...................................................21
5-3 Procedure for Replacing the GZDSP-2 Board ............................................................24
5-4 Procedure for Replacing the GZOSC-1 Board............................................................27
5-5 Procedure for Replacing the GZLF Board...................................................................28
Chapter 6 Replacement Procedures for Options...................................................29
6-1 Procedure for Replacing the Insulating Barrier ...........................................................29
6-2 Procedure for Replacing the GZJP Board...................................................................30
6-3 Procedure for Replacing the GZ Printer Output (R1)..................................................31
6-4 Procedure for Replacing the GZRS232C Output (R2)................................................33
6-5 Procedure for Replacing the GZRS422C Output (R4)................................................35
6-6 Procedure for Replacing the GZ Printer Output + GZRS232C Output (R5)...............37
6-7 Procedure for Replacing the GZ Relay Contact Output + External Tare (LM1)..........39
6-8 Procedure for Replacing the GZ Relay Contact Output + RS232C Output (LM3)......41
6-9 Procedure for Replacing the GZBCD Output..............................................................43

1
Chapter 1 Appearance
1-1 Appearance of the Round Pan Type [1000–2000 g]
1-2 Appearance of the Square Pan Type [6000–15 kg]
(Figure 1-1)
(Figure 1-2)

2
Chapter 2 Configuration of the Electric
Components
2-1 Entire Wiring Diagram
(1) Power Box Type
(Figure 2-1)
Weighing part
Mechanical part
Power box
GZOSC-1 board
Display part
GZLF board
GZDSP-2 board
GZSW-2 board
ON/OFF
Print
Limit/Add
Zero/Tare
Set/Switch

3
(2) Battery Type
(Figure 2-2)
Weighing part
Mechanical part
GZOSC-1 board
Display part
Battery box
GZSW-2 board
GZBDSP-1 board
ON/OFF
Print
Limit/Add
Set/Switch
Zero/Tare

4
Chapter 3 Troubleshooting
3-1 Inspection Procedure
(Figure 3-1)
Is “
“ displayed?
Start
Perform the initial
inspection.
Weight
display mode
Is the displayed
weight stable?
Is the display
normal during
measurement?
Check the
stoppers. Readjustment
Check the corner
error.
Adjust the corner
error
.
Check the
linearity error.
Adjust the
linearity.
The instrument
is normal.
Check the
memory.
Reenter the
coefficient.
Return to the
initial inspection.
Check the output
waveform.
The mechanical
unit has failed.
Replace the
mechanical unit.
Replace the
tuning fork
assembly.
Is the
power supply
voltage in the circuit
normal?
The GZDSP-2
(GZBDSP-1)
board has failed.
The GZLF board
has failed.
Replace the
GZLF board.
Return to the
initial inspection.
The GZOSC-1
board has failed.
The GZOSC-1
board is normal.
The tuning fork
assembly has
failed.
Replace the
GZOSC-1
board.
Is the power
box connected?
Is the battery
box connected?
Connect the
power/battery
box.
Return to the
start.
Are all
necessary
connecters
connected?
Connect all
necessary
connectors.
Return to the
initial inspection.
The instrument
is normal.
Is the GZLF
board normal?
Replace
the GZDSP-2
(GZBDSP-1)
board.

5
3-2 Quick Reference Guide for Troubleshooting
Symptoms Probable causes Remedies
1. The GZDSP-2 (GZBDSP-1) board has
failed. 1. Replace the GZDSP-2 (GZBDSP-1) board.
2. The power/battery box has failed. 2. Replace the power/battery
box.
3. The connection cables inside the balance
are incorrectly connected. 3. Check the connection of the cables.
Noting is displayed.
4. The dry-cell batteries have run out
(battery box type). 4. Replace the dry-cell batteries.
1. The wrong kind of pan is being used. 1. Check the pan.
2. The tuning fork assembly or mechanical
unit has failed. 2. Replace the tuning fork assembly or mechanical
unit.
3. The GZDSP-2 (GZBDSP-1) board has
failed. 3. Replace the GZDSP-2 (GZBDSP-1) board.
4. The coefficient data is improperly set
(when the data was entered). 4. Check the coefficient data.
After “ ” is
displayed,
“ ” or “ ”
is displayed.
5. The coefficient has changed due to static
electricity or noise. 5. Check the coefficient data.
1. Something is in contact with the stopper. 1. Check the mechanical
stopper.
2. Something is in contact with the
calibration weight unit. 2. Check the area around the calibration weight unit.
3. Something is in contact with the pan (or
pan base). 3. Check the area around the pan.
4. There is foreign matter in the balance. 4. Check the area around the
balance’s mechanical part.
5. The tuning fork assembly or mechanical
unit has failed. 5. Replace the tuning fork assembly or mechanical
unit.
6. The balance is being affected by wind or
vibration, etc. 6. Check the area around the balance.
The displayed value is
unstable.
Poor repeatability.
The zero point changes.
7. The GZOSC-1 board has failed. 7. Replace the GZOSC-1
board.
1. The tare is too heavy. 1. Check the tare weight.
2. The coefficient data is improperly set. 2. Check the coefficient data.
3. The coefficient has changed due to static
electricity or noise. 3. Check the coefficient data.
4. Span adjustment has been made with
erroneous weights. 4. Check the adjustment weights.
“ ” is displayed
before the weighing
capacity is reached.
5. Something is in contact with the
calibration weight unit. 5. Check the area around the calibration weight unit.
1. The tuning fork assembly or mechanical
unit has failed. 1. Replace the tuning fork assembly or mechanical
unit.
2. The GZDSP-2 (GZBDSP-1) board has
failed. 2. Replace the GZDSP-2 (GZBDSP-1) board.
3. The coefficient data is improperly set
(when the data was entered). 3. Check the coefficient data.
The span is significantly
incorrect.
4. The coefficient has changed due to static
electricity or noise. 4. Check the coefficient data.
1. The tuning fork assembly or mechanical
unit has failed. 1. Replace the tuning fork assembly or mechanical
unit.
2. The coefficient data is improperly set. 2. Check the coefficient data.
3. The coefficient has changed due to static
electricity or noise. 3. Check the coefficient data.
4. Span adjustment has been made with
erroneous weights. 4. Check the adjustment weights.
Poor linearity
5. The GZOSC-1 board has failed. 5. Replace the GZOSC-1
board.
(Table 3-1)

6
Symptoms Probable causes Remedies
1. The mechanical section has failed. 1. Replace the mechanical
unit.
Improper corner error
2. Something is in contact with the pan (or
pan base). 2. Check the area around the pan.
1. The GZDSP-2 (GZBDSP-1) board has
failed. 1. Replace the GZDSP-2 (GZBDSP-1) board.
2. The power/battery box has failed. 2. Replace the power/battery
box.
The display turns off
during measurement.
3. The batteries have run out. 3. Replace the batteries.
“ ” is displayed.
1. When span adjustment is performed
with external weights, the reference
weights are less than 50% of the
weighing capacity.
1. Set reference weights so
that they weigh 50% or
more of the weighing
capacity.
“ ” is displayed.
1. During semi-auto span adjustment,
adjustment was made with something
placed on the pan.
1. Remove the object on the
pan.
“ ” is displayed.
1. The tuning fork assembly or mechanical
unit has failed. 1. Replace the tuning fork
assembly or mechanical
unit.
“ ” is
displayed. 1. The internal coefficient has
inadvertently been changed. 1. Check the coefficient data.
1. During addition operation, the additions
are overlapped. 1. Adhere to correct operating procedures.
“ ” is
displayed. 2. During addition operation, a 0 (zero) or
negative value was added. 2. Check the added weight.
(Table 3-2)

7
3-3 Initial Inspection
Make sure the balance is not being affected by wind or vibration.
Make sure the pan base and pan are properly in place.
Make sure no foreign objects are present under the pan (or pan base).
Make sure the right kind of pan is used.
Make sure the balance is placed on a stable surface.
Make sure the balance is property leveled.
Make sure the power/battery box is properly connected.

8
3-4 Inspection of the Electrical Components
* The value of Type B is only different in CN-4.
In other check points, the value is shared between Type B and Type D.
1. Power supply voltage check
CN4-… +11 to +13 V (Type B: +6.00 to +10.32 V)
2. In-circuit power supply voltage check
CN2-….. +4.88 to +5.12 V
CN2-….. −4.88 to −5.12 V
3. Signal waveform check
TP0-CN2(tuning fork waveform input)
TP0-CN2(temperature waveform input)
TP0-IC1
64 (main clock)
(Figure 3-2)