Hitachi UC 12SF Techical Data And Service Manual
- Category
- Battery chargers
- Type
- Techical Data And Service Manual
CHARGER
UC 9SF
UC 12SF
UC 14SF
UC 18SF
UC 9SF
UC 12SF
UC 14SF
UC 18SF
MODEL
U
LIST Nos.H857, H858, H859, H860 Mar. 2010
CONTENTS
Page
1. PRODUCT NAME----------------------------------------------------------------------------------------------- 1
2. MARKETING OBJECTIVE ----------------------------------------------------------------------------------- 1
3. APPLICATIONS ------------------------------------------------------------------------------------------------ 1
4. SELLING POINTS ---------------------------------------------------------------------------------------------- 1
4-1. Selling Points---------------------------------------------------------------------------------------------------------- 1
5. SPECIFICATIONS --------------------------------------------------------------------------------------------- 2
5-1. Specifications---------------------------------------------------------------------------------------------------------- 2
5-2. Comparison with Similar Product--------------------------------------------------------------------------------- 2
6. PRECAUTIONS ON SALES PROMOTION-------------------------------------------------------------- 3
6-1. Safety Instructions --------------------------------------------------------------------------------------------------- 3
6-2. Points Requiring Special Attention During Sales Promotion----------------------------------------------- 4
7. REFERENCE MATERIAL ------------------------------------------------------------------------------------ 5
7-1. Structure --------------------------------------------------------------------------------------------------------------- 5
8. PRECAUTIONS ON DISASSEMBLY AND REASSEMBLY ----------------------------------------- 5
8-1. Disassembly----------------------------------------------------------------------------------------------------------- 5
8-2. Reassembly ----------------------------------------------------------------------------------------------------------- 5
8-3. Confirmation after Reassembly --------------------------------------------------------------------------------- 6
9. TROUBLESHOOTING GUIDE ------------------------------------------------------------------------------ 6
9-1. Failure During Charging ------------------------------------------------------------------------------------------- 6
10. STANDARD REPAIR TIME (UNIT) SCHEDULES---------------------------------------------------- 10
Assembly Diagram for UC 9SF
Assembly Diagram for UC 12SF
Assembly Diagram for UC 14SF
Assembly Diagram for UC 18SF
-1-
EB 914S
EB 9B
BCC 912
EB 1814SL
EB 1820L
BCC 1812
EB 1820
EB 18B
UC 9SF
EB 1414S
EB 14B
BCC 1412
UC 14SF
EB 1214S
EB 1220BL
BCC 1212
EB 12B
UC 12SF UC 18SF
1. PRODUCT NAME
Hitachi Charger Models UC 9SF, UC 12SF, UC 14SF and UC 18SF
2. MARKETING OBJECTIVE
The Models UC 9SF, UC 12SF, UC 14SF and UC 18SF are inexpensive 9.6 V, 12 V, 14.4 V and 18
V chargers, respectively, that were developed to promote the sales of our low-cost cordless tools.
3. APPLICATIONS
Recharging of Hitachi Ni-Cd batteries
Applicable batteries:
Model
Item
UC 9SF UC 12SF UC 14SF UC 18SF
Applicable
batteries
BCC 912 [9.6 V,1.2 Ah]
EB 912S [9.6 V,1.2 Ah]
EB 9S [9.6 V,1.2 Ah]
EB 914S [9.6 V,1.4 Ah]
FEB 9S [9.6 V,1.4 Ah]
EB 9B [9.6 V,2.0 Ah]
EB 924 [9.6 V,2.4 Ah]
BCC 1212 [12 V,1.2 Ah]
EB 1212S [12 V,1.2 Ah]
EB 12S [12 V,1.2 Ah]
EB 1214S [12 V,1.4 Ah]
EB 1214L [12 V,1.4 Ah]
FEB 12S [12 V,1.4 Ah]
EB 12B [12 V,2.0 Ah]
EB 1220BL [12 V,2.0 Ah]
EB 1224 [12 V,2.4 Ah]
BCC 1412 [14.4 V,1.2 Ah]
EB 1412S [14.4 V,1.2 Ah]
EB 1414S [14.4 V,1.4 Ah]
EB 1414 [14.4 V,1.4 Ah]
EB 14B [14.4 V,2.0 Ah]
EB 1424 [14.4 V,2.4 Ah]
BCC 1812 [18 V,1.2 Ah]
EB 1812S [18 V,1.2 Ah]
EB 1814SL [18 V,1.4 Ah]
EB 18B [18 V,2.0 Ah]
EB 1820 [18 V,2.0 Ah]
EB 1820L [18 V,2.0 Ah]
EB 1824 [18 V,2.4 Ah]
4. SELLING POINTS
4-1. Selling Points
(1) Inexpensive charger for Ni-CD battery
(2) Approx. 180 minutes to fully charge the 1.2 Ah battery
-2-
5. SPECIFICATIONS
5-1. Specifications
Maker
Models
Item
UC 9SF UC 12SF UC 14SF UC 18SF
Power supply
Frequency: 50 Hz, 60 Hz
Voltage: 230 V
Input capacity 12 W 15W 18 W 23 W
Voltage drop method Isolating transformer with center tap
Rectifying method Full wave rectification
Overcharging protection
system
A thermostat and thermistor monitor the storage battery surface
temperature.
When a specified temperature is detected, indicating that charging is
completed, an electronic control circuit turns off the power to prevent
overcharging.
Charging indication
method
Battery set lamp indication:
With battery mounted: On
With battery removed: Off
Charging voltage 9.6 V 12 V 14.4 V 18 V
Charging current 0.7 A
Charging time
at 20°C (68°F)
Approx. 180 minutes (at 1.2 Ah), at below 0°C: Approx. 240 to 360 min.
Approx. 210 minutes (at 1.4 Ah), at below 0°C: Approx. 280 to 420 min.
Approx. 300 minutes (at 2.0 Ah), at below 0°C: Approx. 400 to 600 min.
Approx. 360 minutes (at 2.4 Ah), at below 0°C: Approx. 470 to 720 min.
Product weight 0.13 kg (0.29 lbs.)
Operating temperature 0°C to 40°C (32°F to 104°F)
Unplug the battery from the charger upon reaching the approximate charging time above. The
Battery Set lamp goes off when the battery is unplugged from the charger. Note that in case of low
battery temperature (below 0°C) or low supply voltage, the battery may not be fully charged.
Should you feel that the charger potential has been lowered, charge the battery longer than the
charging time above.
5-2. Comparison with Similar Product
HITACHI
Maker
Models
Item
UC 9SF UC 12SF UC 14SF UC 18SF UC 12SD
Charging time
min.
Approx. 180 (at 1.2 Ah), at Under 0°C: Approx. 240 to 360 min
Approx. 210 (at 1.4 Ah), at Under 0°C: Approx. 280 to 420 min
Approx. 300 (at 2.0 Ah), at Under 0°C: Approx. 400 to 600 min
Approx. 360 (at 2.4 Ah), at Under 0°C: Approx. 470 to 720 min
Approx. 60
(at 1.2 to 1.4 Ah)
Charging voltage
V
9.6 12 14.4 18 12
Charging current
A
0.7 1.55
Applicable ambient
temperature range
°
C
(
°F)
0 to 40
(32 to 104)
10 to 40
(50 to 104)
Charging completion
system
Thermostat and Thermistor Thermistor Thermostat
Outer dimensions
mm
(in)
75 x 80 x 69
(2-61/64 x 3-9/64 x 2-23/32)
181 x 87 x 80
(7-1/8 x 3-7/16
x 3-5/32)
Product weight
kg
(Ibs.)
0.13
(0.29)
1.5
(3.3)
-3-
6. PRECAUTIONS ON SALES PROMOTION
6-1. Safety Instructions
In the interest of promoting the safest and most efficient use of the Models UC 9SF, UC 12SF, UC
14SF and UC 18SF Chargers by all of our customers, it is very important when concluding a sale
that the salesperson carefully ensure that the buyer seriously recognizes the importance of the
Handling Instructions, and fully understands the precautions listed on the Caution Plate and
Nameplate attached to the tool.
6-1-1. Handling instructions
Salespersons must be thoroughly familiar with the contents of the Handling Instructions in order to
give pertinent advice to the customer.
(1) The charged battery voltages are fixed to 9.6 V for the UC 9SF, 12 V for the UC 12SF, 14.4 V for
the UC 14SF, and 18 V for the UC 18SF.
Never try to charge a battery whose voltage is higher than the voltage that the adapter can
supply. Doing so may damage the charger’s printed circuit board or the AC adapter.
(2) Only connect the charger to an AC power outlet.
The use of any other power source (e.g., DC outlet, engine-powered generator) will cause the
charger to overheat and burn out.
(3) Do not use any voltage-increasing equipment (e.g., voltage regulator) between the power
supply and the charger.
Using the charger with voltage exceeding that indicated on the unit will result in malfunction.
(4) Conduct battery charging in an ambient temperature range of 0°C to 40°C.
Any attempt at charging when the ambient temperature is below 0°C will fail or overcharging
will occur due to a malfunctioning recharging control circuit. Any attempt at charging when the
ambient temperature is above 40°C will result in charging being stopped before the battery is
fully charged due to a rise in temperature during charging, given the small difference between
the upper-limit rechargeable battery temperature (40°C) and the ambient temperature.
(5) Do not use the charger for repeated charging.
Charging two or more batteries successively at a very hot location may cause an excessive
rise in charger temperature and result in charger failure. Instruct the customer to wait at least
15 minutes before charging a second battery. Particular care is necessary in summer.
(6) Do not insert foreign objects into the air vents on the charger.
The charger case is equipped with air vents to protect internal electronic components from
overheating. Instruct the customer to never drop or insert foreign matter, such as metallic or
flammable objects, into the air vents. This could cause electric shock, fire or other serious
hazards.
(7) Do not attempt to disassemble the charger.
Incorrect parts replacement and/or wiring will cause malfunctions that could result in fire or
other hazards. Instruct the customer to bring the charger to an authorized service center in the
event that repair or replacement is necessary.
-4-
A
mbient temperature
at below 0°C (below 32°F)
at 0°C to 40°C (32 to 104°F)
Storage battery: 1.2 Ah Battery
s s
95% of
rated voltage
105% of
rated voltage
Rated voltage
(Voltage listed
on nameplate)
360
300
240
180
120
Charging time
Input power supply voltage
(minutes)
6-2. Points Requiring Special Attention During Sales Promotion
The customer should be advised of the following points during sales promotion of the charger.
6-2-1. Charging may not be possible at high storage battery temperature
Charging may not be possible when the battery temperature is 40°C (104°F) or higher after the
battery has been exposed to direct sunlight for a long time or immediately after it has been used.
In such cases, the customer should be advised to place the battery in the shade with good airflow,
and allow it to cool sufficiently prior to recharging. This condition is common to all existing chargers
(both Hitachi's and its competitor's models) that employ temperature-sensitive devices to
terminate charging. The cooling period required before charging varies from a few minutes to
about 30 minutes, depending on how long the battery was used and the ambient temperature.
6-2-2. Charging time may be longer under low ambient temperature or power supply voltage
The charging time is greatly influenced by the ambient temperature and input power supply
voltage.
Fig. 1 shows the relation between input power supply voltage and charging time.
Charging takes less time under high input power supply voltage; it takes more time under low
voltage. Be sure to advise the customer to charge the batteries at the ambient temperature
specified in the Handling Instructions and at the rated voltage listed on the nameplate.
Fig. 1 Relation between input power supply voltage and charging time
-5-
AC-Adapter [7]
Case (B) [2]
Tapping Screw
(W/Flange) D3 x 20 [5]
Printed Circuit Board [3]
Terminal (A)
Case (A) [4]
7. REFERENCE MATERIAL
7-1. Structure
(1) The outer frame consists of Case (A) [4] and Case (B) [2]. The printed circuit board is located
inside this frame.
(2) The printed circuit board consists of other electronic devices to permit rapid charging and
protect against overcharging.
Fig. 2
8. PRECAUTIONS ON DISASSEMBLY AND REASSEMBLY
[Bold] numbers in the descriptions below correspond to item numbers in the parts list and
exploded assembly diagram.
8-1. Disassembly
(1) Remove the two Tapping Screw (W/Flange) D3 x 20 [5], and take off Case (B) [2].
The Printed Circuit Board [3] and AC-Adapter [7] cord can then be taken out in an assembled
body.
(2) To separate the Printed Circuit Board [3] and AC-Adapter [7] cord, use a soldering iron to melt
the soldered portions.
NOTE: Ideally, the soldered portions should be freed with a solder absorber. When a
soldering iron must be used, use one with a rated power of 35 W.
8-2. Reassembly
For reassembly, reverse the following disassembly steps. However, special attention should be
taken to ensure that the Battery Set lamp, AC-Adapter [7] cord and charging terminals are
properly installed in their prescribed grooves.
-6-
8-3. Confirmation after Reassembly
Upon completing reassembly, confirm the items below.
(1) Confirm the following after reassembly:
• Plug the AC-Adapter [7] into the AC power outlet.
Use a tester to confirm that the voltage on terminal (A) is within the specified range below.
Model
Terminal (A)
Check terminal
Voltage range
(V)
UC 9SF
+ -
T
16.6 to 20.7
UC 12SF
+ -
T
20.7 to 25.6
UC 14SF
+ - -
22.6 to 28.0
UC 18SF
+ - -
28.1 to 34.2
In Adaptors UC 9SF and UC 12SF, the T terminal functions as a negative terminal - .
• Connect the battery to the charger for charging.
Make sure the Battery Set lamp lights.
(2) Measure the insulation resistance and conduct a dielectric strength test.
Insulation Resistance: 10 megohms or more between the plug blade of the cord and the
nameplate or fastening screws on the case as measured with a DC 500 V megohm tester
Dielectric strength test:
(a) Between the plug blade of the cord and the charging terminal blade
(b) Between the plug blade of the cord and the nameplate or fastening screws on the case
The dielectric strength test should be conducted at the following voltage:
Voltage on the nameplate Test voltage
230 V AC 3,750 V (for 1 minute)
CAUTION: Insulation resistance must be measured between the plug blade and the
nameplate or fastening screws on the case; the dielectric strength test must
be conducted between the plug blade and the charging terminal blade.
Under no circumstances should tests be conducted between both plug
blades or both charging terminal blades, which may cause the charger to
burn out.
9. TROUBLESHOOTING GUIDE
9-1. Failure During Charging
The battery was inserted into the
adapter, but the Battery Set lamp
remains off.
The battery was inserted into the
adapter and the Battery Set lamp goes
on, but charging does not start.
Abnormal heat is generated.
To Failure Mode (A)
To Failure Mode (B)
To Failure Mode (C)
Failure
-7-
(1) Failure Mode (A) Steps and Repair Procedures
YES
YES
YES
NO
NO
NO
YES
NO
Use a tester to check voltage.
Adapter terminal
resistance 1kΩ or
more?
Charger and terminal
(A) dirty?
Rated voltage on power outlet?
The battery was inserted into
the adapter, but the Battery
Set lamp remains off.
The printed circuit board is
defective.
Replace the printed circuit
board unit.
(S)-(-) battery terminal
resistance 2k to 100kΩ?
A
pply rated voltage.
Replace AC adapter.
Clean both parts. Check fo
r
terminal (A) deformation.
Replace battery.
The rated voltage is 230 VAC.
-8-
(2) Failure Mode (B) Steps and Repair Procedures
YES
YES
NO
NO
NO
YES
NO
YES
YES
NO
The battery was inserted into the
adapter and the Battery Set lamp goes
on, but charging does not start.
Use a tester to check voltage.
A
pply rated voltage.
Rated voltage on power outlet?
Regulate ambient temperature.
Ambient temperature
OK?
The battery is not charged if the
body temperature is 40°C or
higher.
Battery body hot?
Battery voltage stable?
The printed circuit board is
defective.
Replace the printed circuit
board unit.
Can the battery be
charged by another charger?
Set ambient temperature in the
range of 0 to 40°C.
Fully cool the battery and recharge it.
The rated voltage is AC 230 V.
Replace the battery.
-9-
(3) Failure Mode (C) Steps and Repair Procedures
NO
NO
YES
NO
YES
YES
Too hot battery or adapter
Battery too hot?
AC adapter too hot?
Replace the battery.
A
pply rated voltage.
Rated voltage on powe
r
outlet?
Replace the adapter.
The printed circuit board is
defective.
Replace the printed circuit
board unit.
Use a tester to check voltage.
The battery is hot immediatel
y
after full charging.
It's not a problem.
The rated voltage is AC 230 V.
A
higher supply voltage ma
y
break the adapter.
-10-
10. STANDARD REPAIR TIME (UNIT) SCHEDULES
MODEL
Variable
Fixed
10 20 30 40 50 60 min.
Work Flow
UC 9SF
UC 12SF
UC 14SF
UC 18SF
General Assembly
Case (B)
Case (A)
Printed Circuit
Board
AC-Adapter
Model UC 9SF
CHARGER
LIST NO. H857
(E1)
2010 3 11
1
2
3
4
5
6
7
•
•
PART
S
UC 9SF
DESCRIPTION REMARKS
1 NAME PLATE 1
2 332-725 CASE (B) 1
3 332-739 PRINTED CIRCUIT BOARD 1
4 332-721 CASE (A) 1
5 300-036 TAPPING SCREW (W/FLANGE) D3 X 20 2
6 CAUTION LABEL 1
* 7 332-735 AC-ADAPTER (9.6V U.K) 1
* 7 332-736 AC-ADAPTER (9.6V EURO) 1
- 2 - Printed in Japan 03 - 10
(100311N)
*ALTERNATIVE PARTS
ITEM
NO.
NO.
USED
CODE NO.
Model UC 12SF
CHARGER
LIST NO. H858
(E1)
2010 3 11
1
2
3
4
5
6
7
•
•
PART
S
UC 12SF
DESCRIPTION REMARKS
1 NAME PLATE 1
2 332-724 CASE (B) 1
3 332-739 PRINTED CIRCUIT BOARD 1
4 332-721 CASE (A) 1
5 300-036 TAPPING SCREW (W/FLANGE) D3 X 20 2
6 CAUTION LABEL 1
* 7 332-732 AC-ADAPTER (12V U.K) 1
* 7 332-733 AC-ADAPTER (12V EURO) 1
- 2 - Printed in Japan 03 - 10
(100311N)
*ALTERNATIVE PARTS
ITEM
NO.
NO.
USED
CODE NO.
Model UC 14SF
CHARGER
LIST NO. H859
(E1)
2010 3 11
1
2
3
4
5
6
7
•
•
PART
S
UC 14SF
DESCRIPTION REMARKS
1 NAME PLATE 1
2 332-723 CASE (B) 1
3 332-740 PRINTED CIRCUIT BOARD 1
4 332-721 CASE (A) 1
5 300-036 TAPPING SCREW (W/FLANGE) D3 X 20 2
6 CAUTION LABEL 1
* 7 332-729 AC-ADAPTER (14.4V U.K) 1
* 7 332-730 AC-ADAPTER (14.4V EURO) 1
- 2 - Printed in Japan 03 - 10
(100311N)
*ALTERNATIVE PARTS
ITEM
NO.
NO.
USED
CODE NO.
Model UC 18SF
CHARGER
LIST NO. H860
(E1)
2010 3 11
1
2
3
4
5
6
7
•
•
PART
S
UC 18SF
DESCRIPTION REMARKS
1 NAME PLATE 1
2 332-722 CASE (B) 1
3 332-738 PRINTED CIRCUIT BOARD 1
4 332-721 CASE (A) 1
5 300-036 TAPPING SCREW (W/FLANGE) D3 X 20 2
6 CAUTION LABEL 1
* 7 332-726 AC-ADAPTER (18V U.K) 1
* 7 332-727 AC-ADAPTER (18V EURO) 1
- 2 - Printed in Japan 03 - 10
(100311N)
*ALTERNATIVE PARTS
ITEM
NO.
NO.
USED
CODE NO.
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Hitachi UC 12SF Techical Data And Service Manual
- Category
- Battery chargers
- Type
- Techical Data And Service Manual
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