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PRODUCT NAME
Hitachi Charger
Model UC 36YRL
CONTENTS
LIST No.
UC 36YRL: G884
Aug. 2007
Page
PRECAUTIONS IN DISASSEMBL Y AND REASSEMBLY --------------------------------------------------------- 1
1. Disassembly ----------------------------------------------------------------------------------------------------- 1
2. Reassembly ------------------------------------------------------------------------------------------------------ 1
3. Confirmation after Reassembly ----------------------------------------------------------------------------- 3
TROUBLESHOOTING GUIDE --------------------------------------------------------------------------------------------- 4
1. Troubleshooting Based on Pilot Lamp Indications ----------------------------------------------------- 4
2. Troubleshooting and Repair Procedures ----------------------------------------------------------------- 4
ST ANDA RD REPAIR TIME (UNIT) SCHEDULES---------------------------------------------------------------------- 8
U
International Sales Division
Page 2
. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
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The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and exploded
assembly diagram for the Model UC 36YRL .
-1. Disassembly
(1) Remove Case (A) [2] after removing the four Case Rubbers [12] and the four Tapping Screws (W/Flange) D3
x 18 [11] .
(2) Remove Fan [20] after removing the two Tapping Screws (W/Flange) D3 x 25 [19] and remove the connector
of the Fan [20] from the Printed Circuit Board Ass'y [7].
(3) Remove Fin (D) [5] and Fin (E) [8] from the Printed Circuit Board Ass'y [7] after removing the three Machine
Screws (W/Washers) M3 x 12 [3], three Nuts M3 [6] and four TP Tapping Screws D3 x 8 [4].
(4) Remove the Insulator [9] from the Printed Circuit Board Ass'y [7].
(5) Remove the Terminal Holder [15] after removing the three TP Tapping Screws D3 x 8 [4], connector of the
Terminal Holder [15] from the Printed Circuit Board Ass'y [7] and melt their soldered connections of the red
and black lead wires of the Terminal Holder [15] with a soldering iron and remove them.
(6) Remove the Cord [18] from the Printed Circuit Board Ass'y [7] after melting their soldered connections with a
soldering iron. (The long lead wire of the Cord [18] for U.S.A/Canada is covered with the tube.)
(7) A Prism [14] for pilot lamps is built into Case (A) [2] and the Filter [16] is sticked on Case (A) [2].
(NOTE)
Ideally, the soldered portions should be freed with a solder absorber. If a soldering iron must be used,
use one with a rated power of 35 W.
As excessive heat may damage the material of the printed circuit board, use of the soldering iron should be
limited to less than three seconds at one time.
-2. Reassembly
Reassembly can be accomplished by following the disassembly procedures in reverse; however, special attention
should be given to ensure that lamps, cord armor and charging terminals are properly installed in their prescribed
grooves.
(1) Screw tightening torque
•
1 Machine Screws (W/Washers) M3 x 12 [3]................................................... 0.6 - 1.0 N
2 TP Tapping Screw D3 x 8 [4]
• Attaching Fin (D) [5] and Fin (E) [8] ........................................................... 0.8 - 1.2 N•m (8.0 - 12.0 kgf•cm)
• Attaching Terminal Holder [15] ................................................................... 0.3 - 0.7 N•m (3.0 - 7.0 kgf•cm)
3 Tapping Screw (W/Flange) D3 x 18 [11] ....................................................... 0.8 - 1.2 N•m (8.0 - 12.0 kgf•cm)
m (6.0 - 10.0 kgf•cm)
4 Tapping Screw (W/Flange) D3 x 25 [19] ....................................................... 0.8 - 1.2 N•m (8.0 - 12.0 kgf•cm)
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TP Tapping Screw D3 x 8 [4]
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Printed Circuit Board Ass'y [7]
Fuse [17]
Fin (E) [8]
Case (B) [10]
Machine Screw (W/Washers)
M3 x 12 [3]
Nut M3 [6]
Fin (D) [5]
Tapping Screw (W/Flange) D3 x 25 [19]
Long lead wire of the Cord [18]
Tube (for U.S.A/Canada)
Short lead wire of the Cord [18]
Fan [20]
Cord [18]
Connector of the Fan [20]
Insulator [9]
Lead wire (black) of the
Terminal Holder [15]
Lead wire (red) of the
Terminal Holder [15]
Connector of the Terminal Holder [15]
Terminal Holder [15]
TP Tapping Screw D3 x 8 [4]
Filter [16]
Case (A) [2]
Prism [14]
Fig. 1
Page 4
-3. Confirmation after Reassembly
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(1) Confirm the following after reassembly. The red pilot lamp on the charger lights up when charging is started.
• When charging an BSL 3626 battery, confirm that the red pilot lamp flashes at 1 second intervals approx.
80 minutes from commencing charging.
(2) Measure the insulation resistance and conduct a dielectric strength test.
• Insulation resistance: 10 M Ω or more between the plug blade of cord and the name plate or case fastening
screws, 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 name plate or the fastening screws on the case.
Based on the voltage listed on the Name Plate, dielectric strength test should be conducted.
Voltage on the name plate Test voltage
120 V
220 V to 240 V
AC 1,240 V (1 minute)
AC 3,750 V (1 minute)
CAUTION: Without fail, insulation resistance must be measured between the plug blade of the cord and
the name plate or the fastening screws, and dielectric strength test must be conducted
between the plug blade of the cord and the charging terminal blade or between the plug blade
of the cord and the name plate or the fastening screws on the case. Under no circumstances
should testing be conducted between both blades of the plug, or both blades of the charging
terminal, which may cause burn-out of the charger.
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. TROUBLESHOOTING GUIDE
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-1. Troubleshooting Based on Pilot Lamp Indications
Phenomenon
Typical causes
Check procedures
Pilot lamp fails to light or flash.
Red pilot lamp does not stay lit
(continues to flicker) after
battery has been connected.
Pilot lamp remains green (red
fails to light) after battery has
been connected.
Pilot lamp indicates abnormality
by flashing red rapidly (at 0.2
second intervals.)
-2. Troubleshooting and Repair Procedures
(1) Trouble mode (A)
Pilot lamp fails to light or flash.
(1) Faulty AC cord
(2) Blown fuse (3.15 A) on primary side
(1) Poor connection of (T) or (LS) terminal
(2) Faulty battery (open circuit)
(3) Faulty PCB
(1) Poor connection of (T) or (LS) terminal
(2) Faulty PCB
(1) Faulty battery (short-circuit, or open circuit)
(2) Faulty PCB
Refer to trouble mode (A).
Refer to trouble mode (B).
Refer to trouble mode (C).
Refer to trouble mode (D).
voltage applied
to the plug ?
Check with tester.
continuity between
the blades of the
AC cord plug ?
YES
Faulty internal circuit
Replace PCB.
Is rated
YES
Is there
NO
NO
Apply rated voltage.
Replace the fuse.
YES
on the primary side
Is there
an open circuit in
the AC cord ?
NO
Is the fuse
blown ?
NO
YES
Replace the AC cord.
Faulty internal circuit
Replace PCB.
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(2) Trouble mode (B)
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Red pilot lamp does not stay lit
(continues to flash) after battery
has been connected.
Are the connection terminals
of the charger or the battery dirty, deformed,
or otherwise abnormal ?
NO
Check with tester.
Is the resistance between
(LS) and (
2 KΩ to 100 KΩ ?
Faulty internal circuits
---
) terminals
YES
YES
NO
Remove dirt or
correct abnormality.
Replace the battery.
Replace PCB.
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(3) Trouble mode (C)
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Pilot lamp remains green (red fails to light)
after battery has been connected.
Is ambient temperature
within designated range (between
0 C and 40 C) ?
YES
Is the
battery very
hot ?
NO
Are the connection
terminals of the charger
or the battery dirty or
deformed ?
NO
NO
YES
YES
Conduct charging within
designated temperature range.
0 C to 40 C
Allow battery to cool prior to
charging.
Charging cannot be accomplished if
battery temperature is above 50 C.
Clean, or repair deformed
terminals.
Is the resistance
between (LS) and (
2 K Ω to 100 K Ω ?
Faulty internal circuits
Replace PCB.
---
) terminals
YES
NO
Replace battery.
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(4) Trouble mode (D)
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Pilot lamp flickers red,
indicating abnormality.
Is the battery
connected surely ?
NO
Is there some
sort of conductive foreign
matter in the hole where the
battery is inserted ?
NO
Is the battery short-circuited
or opened ?
NO
Faulty internal circuit
YES
YES
YES
Insert battey surely.
Remove foreign matter.
Replace the battery.
Replace PCB.
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. STANDARD REPAIR TIME (UNIT) SCHEDULES
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MODEL 10 20 30 40
UC 36YRL
Fixed
General Assembly
Variable
Work Flow
Case (A)
Case (B)
Printed Circuit
Board Ass'y
Prism
Terminal
Holder
Fuse
Fan
Fin (D)
Fin (E)
Insulator
Cord
60 min.50
Page 10
Hitachi Power Tools
Ташев-Галвинг ООД
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ELECTRIC TOOL PARTS LIST
LIST NO. G884
CHARGER
Model UC 36YRL
1
2
4
5
2007 • 8 •10
(E1)
14
3
15
4
4
6
7
3
8
9
10
11
6
16
17
18
19
20
12
13
Page 11
PARTS
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ITEM
*18 328-634 CORD 1
*18 328-635 CORD 1 FOR NZL, AUS
*18 328-636 CORD 1 FOR GBR
CODE NO.
NO.
1 328-637 HITACHI LABEL 1
2 328-630 CASE (A) 1
3 993-963 MACHINE SCREW (W/WASHERS) M3X12 3
4 327-174 TP TAPPING SCREW D3X8 7
5 328-632 FIN (D) 1
6 949-553 NUT M3 (10 PCS.) 3
7
8 328-633 FIN (E) 1
9 328-622 INSULATOR 1
10 328-618 CASE (B) 1
11 326-358 TAPPING SCREW (W/FLANGE) D3X18 4
12 327-173 CASE RUBBER 4
13 NAME PLATE 1
14 322-201 PRISM 1
15 327-176 TERMINAL HOLDER 1
16 328-531 FILTER 1
17 328-679 FUSE (250V-3.15A) 1
19 327-175 TAPPING SCREW (W/FLANGE) D3X25 2
20 326-809 FAN 1
PRINTED CIRCUIT BOARD ASS’Y 230V-240V
DESCRIPTION
NO.
USED
1 INCLUD. 17
UC 36YRL
REMARKS
--- 2 ---
ALTERNATIVE PARTS
*
Printed in Japan
(070810N)
8 -- 07
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