Sharp ER-A450T User manual

SERVICE MANUAL
ELECTRONIC
CASH REGISTER
MODEL ER-A450T
SRV Key : LKGIM7113RCZZ
PRINTER: PR-45M
("U" and "A" version)
CAUTION
EXTREME CAUTION MUST BE TAKEN WHEN SERVICING THIS MACHINE. WHEN THE
MODE SWITCH IS IN THE OFF POSITION, VOLTAGE IS STILL SUPPLIED TO THE ENTIRE
MACHINE.
WHEN WORKING ON THIS MACHINE MAKE SURE THAT THE POWER CORD IS
REMOVED FROM THE WALL OUTLET.
CHAPTER 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
CHAPTER 3. SERVICE RESET AND MASTER RESET . . . . . . . . . . . . . . . . 3-1
CHAPTER 4. HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
CHAPTER 5. TEST FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
CHAPTER 6. DOWN LOAD FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
CHAPTER 7. SERVICE PRECAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
CHAPTER 8. CIRCUIT DIAGRAM & PWB LAYOUT . . . . . . . . . . . . . . . . . . . 8-1
PARTS GUIDE
SHARP CORPORATION
CONTENTS
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.

CONTENTS
PARTS GUIDE
MODEL ER-A450T
PRINTER:PR-45M
SRV KEY:LKGIM7113BHZZ
(for U.S.A,Canada)
1Exteriors
2Keyboard unit
3Packing material & Accessories
4Drawer box unit (SK423 type)
5Main PWB unit(include Block6)
6RS232C PWB unit
7PS PWB unit
8Front LED PWB unit
9Pop up LED PWB unit
FPrinter PWB unit
GArticles for consumption
HService route options
■Index
Parts marked with "!" are important for maintaining the safety of the set.Be sure replace these parts with
specified ones for maintaining the safety and performance of the set.
SHARP CORPORATION This document has been published to be
used for after sales service only.
The contents are subject to change without
notice.
ER-A450TU/A

1Exteriors
NO. PARTS CODE PRICE
RANK NEW MARK PART RANK DESCRIPTION
1PFILW6976BHSA AU N D Front filter
2GCABB7861BHZZ AN D Pop up cabinet
5CPWBF7504BH01 BC E Pop up LED PWB unit(NORMAL)
6PFILW6961BHSF AP N D Pop up filter
7QCNW-7878BHZZ AK C Flat cable(Pop-up) (15P)
8GCABB7857BHZE BD D Top cabinet (Gray282)
9XBBSC30P08000 AA C Screw (3×8)
10 HDECP6864BHSB AM N D Deco panel
13 GCOVH7144BHZZ AH D RS232C cover
14 LANGK2897BHZZ AQ C RS232C angle B
16 XUPSD40P10000 AA C Screw (4×10)
17 GFTAF6921BHSC AH D Clerk cover A
18 XEBSD30P08000 AA C Screw (3×8)
19 QCNW-7880BHZZ AF C Battery cable
20 UBATZ6661BHZZ BA B Battery (Ni-MH)
21 GCOVH7143BHZZ AH D Battery cover
22 CPWBF7552BH01 BC E Front LED PWB unit
23 CPWBX2878BH02 CL N E Main PWB unit
27
! QACCD8411BHNA AX B AC cord (SP-035)(Y-G)
28 XHBSD40P06000 AA C Screw (4×6)
29
! RTRNP2421BHZZ BF N B Power transformer
30 QCNW-7872BHZZ AK C PS cable
31 LBNDJ2003SCZZ AA C Cable band (Large)
32 XNESD30-24000 AA C Nut (M3)
34 XHBSD30P04000 AA C Screw (3×4)
35 QTANZ6661BHZZ AE C Faston terminal
38 CPWBF7554BH04 BK N E PS PWB unit [include No.71]
39 PRDAF6666BHZA AN C Heat sink
41 XEBSD30P10000 AA C Screw (3×10)
43 QCNW-7121RCZZ AD C Printer GND wire
44 XBPSD30P06K00 AA C Screw (M3×6K)
45 KI-OB2359BHZZ CA E Printer unit (PR-45M)
46 LHLDZ6847BHZZ AS C Printer stand
48 GCOVA7140BHZZ AZ D Printer cover
49 PFILD6973BHZZ AS D Journal filter
62 LX-BZ6644BHZZ AA C Screw (M3.5×8S)
63 GCOVH7147BHZZ AK D PS cover
64 CPWBX2878BH02 CL N E Main PWB unit [RS232C PWB]
65 GCOVH7142BHZA AT D Trans cover
66 LX-BZ6782BHZZ AA C Screw (3×6)
67 XBPBZ40P08K00 AA C Screw (4×8K)
68 QTANP0004BHZZ AE C Earth terminal
70 NROLP6651BHSC AE C Paper plate roller
71 LX-BZ6644BHZZ AA C Screw (M3.5×8S) [Q1(HEAT SINK fixing)]
72 PCAPH1005ACZZ AC D Connector cover (9pin)
74 LX-BZ6792BHZZ AF C Bolt(D-sub screw)
75 XEBSD30P14000 AA C Screw (3×14)
76 QCNW-7898BHZZ AP C Flat cable (40P)
77 QCNW-3112BHZZ AE C GND wire (RS PWB-KEY BOARD)
ER-A450TU/A
– 1 –

1Exteriors
32
34
35
65 66
66
RCP00363
74
34A
77
B
B
18
62
63
10
13
14
16
17
18
18
64
1
25
6
7
89
75
43
75 44
44
45
49
48
41
34
34
70
19
20
21
28
27
31
18
39
46
41 18
18
22
29
30 18
18
18
18
18
23
38
71
72
76
67
68
ER-A450TU/A
– 2 –