Casio PCR-365A User manual

SERVICE MANUAL
ELECTRONIC CASH REGISTER
(without price)
Printer Model : M-190G-071
PCR-365A(EX-248AC)
CE-250(EX-248BC)
CE-200(EX-248CC)
JUN. 2000
INDEX

CONTENTS
PCR365A/CE-250/CE-200 Page
1.SPECIFICATIONS........................................................................................1
2.INITIALIZE (MAC) OPERATION..................................................................2
3.BLOCK DIAGRAM.......................................................................................3
3-1.PCB CONNECTION.....................................................................................................3
3-1.BLOCK DIAGRAM.......................................................................................................4
4.DISASSEMBLY............................................................................................5
5.CIRCUIT EXPLANATION............................................................................7
5-1.Power supply circuit..................................................................................................7
5-2.CPU (uPD78052GC-159-3B9).....................................................................................8
5-3.Display controller (uPD16312GB-3B4)...................................................................10
5-4.Initilize IC (Reset circuit)..........................................................................................11
5-5.Power down detection circuit (PWD)......................................................................11
5-6.Address latch circuit................................................................................................11
5-7.RAM / ROM bank selection circuit..........................................................................12
5-8.Head drive circuit for printer...................................................................................13
5-9.Power supply circuit for display.............................................................................14
6.DIAGNOSTIC OPERATION.......................................................................15
6-1.To start the diagnostic program.............................................................................15
6-2.Check item................................................................................................................15
6-3.Operation of each test..............................................................................................15
6-4.To exit the diagnostic test.......................................................................................20
7.ERROR CODE LIST...................................................................................21
7-1.Operation error code................................................................................................21
7-2.System lock code.....................................................................................................22
8.IC DATA.....................................................................................................23
9.PCB LAYOUT............................................................................................26
10.CIRCUIT DIAGRAM...................................................................................27
11.PARTS LIST...............................................................................................42

— 1 —
• CPU Name µPD78052GC-159-3B9
Number of control bit 8bit
• RAM Name TC55257DPL-70L/85L
Capacity 256 Kbits
• ROM Name M27C512-10/12F1
Capacity 512 Kbits
• Printer Name M-190G (071)
Print method Dot matrix printing
MCBF 1,500,000 lines
Life 2,250,000 lines
(Motor, Head unit, Cam trigger set, etc.)
• Roll paper Type Fine-quality paper
of Pressure-sensitive copy paper
Size Width 57.5 ±0.5 mm
Roll diameter 80 mm or less
Thickness Upper : 0.066 mm
Lower : 0.058 mm
1. SPECIFICATIONS
1-1. Electrical specifications
120V
• Power consumption In operation Max. 0.28 A
Min. 0.12 A
Power OFF 0.10 A
• Memory protection Back-up battery Mangan Battery (UM-3 ×3 pcs)
Back-up period 1 year (25 °C)
Battery life Replace the battery every 1 years.
• Clock & Calendar Accuracy Within ±30 sec. per month (25 °C)
Auto calendar Effective until 2099 A.D.
1-2. Environmental specifications
• Operating temperature 0 °C ~ 40 °C
• Operating humidity 10 % ~ 90 %
• Storage temperature -25 °C ~ 65 °C
• Storage humidity 10 % ~ 95 %
• Vibration strength 1.5 G (The machine must be in the carton box)
1-3. Main components

— 2 —
DEVICE NAME MODEL NOTE
• Wet cover WT-73
• P/C cable PRL-CB-2 Com 1 port only
• Ink ribbon cassette ERC-40P Ribbon life: approx. 2,000,000 characters
1-5. Option List
1-4. Drawer List
DRAWER NAME Specification NOTE
• DL-1324 (M type) D-14B2M-D54RP-9* USA
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the manufacturer.
Dispose of used batteries according
to the manufacture’s instructions.
VORSICHT !
Explosionsgefahr bei unsachgemäßem Austausch der Batterie.
Ersatz nur durch denselben oder einen vom
Hersteller empfohlenen gleichwertigen Typ.
Entsorgung gebrauchter Batterien nach
Angaben des Herstellers.
ADVARSEL !
Lithiumbatteri - Eksplosionsfare ved fejlagtig hándtering.
Udskiftning má kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandØren.
2. INITIALIZE (MAC) OPERATION
1. Set the mode switch to "OFF" position.
2. Pressing the "FEED" button and turn the mode switch to "PRG" position.
3. Release the "FEED" button.
4. Initialize operation is executed.

— 3 —
3.BLOCK DIAGRAM
3-1.PCB CONNECTION
Mode SW
E266-E3-1
CN4
24P 24P
Main Display
(SH101MA)
E248-E2-1
12P10P
Pop up Display
(SH1019A)
E248-E2-2
Fuse
Transformer
TE248-E1D
3P CN8 CN1(4P)
CN9
CN5
CN10
2P
20P
3P CN2
CN11
25P
7P
Mangan Battery
(UM-3 X 3 )
Winder
Motor
Printer
(M-190G)
Drawer
E248-1
FPC

— 4 —
3-2. BLOCK DIAGRAM
CPU
uPD78052GC-093-3B9
Head Drive Circuit
Reset Circuit
Keynoard
Mode key
Power Supply Circuit
HA.A ~ HD.H
PRINTER
M-190G
DISPLAY CONTROL
uPD16312GB-3B4
CUSTOMER DISPLAY
SH1019A MAIN DISPLAY SH101MA
DI,DO,CLK,STB
Segment & Digit data
A8 ~ A15
KC0 ~ KC4
Select address
AD0 ~ AD7
AD0 ~ AD5
AD0 ~ AD7
AD0 ~ AD7
ROM
RAM
A8 ~ A11
A8 ~ A15
A0 ~ A7
A0 ~ A7
ASTB
enable
BUS Select Circuit
KEY Circuit
FD,RP,MD,DP
MAIN PCB E248-1

— 5 —
4. DISASSEMBLY
1. Open the printer cover.
Remove the 2 screws of the upper case.
Remove the 2 screws.
2. Slide the upper case to the front side.
3. Open upper case from the left side.

— 6 —
Hook
4. Release the hook them Remove the write side.
5. Release 3 screws to remove printer plastic
stand.
6. Release 2 screws to remove printer unit.
7. To remove the main PCB, release 7 screws.
Remove the 3 screws
Remove the 2 screws
Remove the 7 screws

— 7 —
Q1: Power transistor
Q2: Voltage detection transistor
Voltage level at above check point (unit: V )
Measurement
position ABCD
Voltage (V) 12.5V 5.3V 6.2V 2.47V
5. CIRCUIT EXPLANATION
5-1. Power supply circuit
A C
B
D

— 8 —
Pin No. Signal Description In/Out Status of
Power On Status of Power OFF
1FB3Not used ———
2FB4RAM bank 3 OutHigh High
3FB5RAM bank 4 OutHigh High
4AVSS GND—GNDGND
5PGMNot used ———
6RAMChip select signal for RAM OutHigh Low
7AVREF VDD—5 V 5 V
8RXDReceive data InHigh High
9TXDSend data OutHigh High
10WDWinder motor drive signal OutLowLow
11DIData signal from uPD16312 InPulse High
12DOData signal to uPD16312 OutPulse High
13CLKClock signal for uPD16312 OutPulse High
14STBData strobe signal for uPD16312 OutPulse High
15KC0Key common signal (KC0) OutPulse High
16KC1Key common signal (KC1) OutPulse High
17KC2Key common signal (KC2) OutPulse High
18KC3Key common signal (KC3) OutPulse High
19AD0Address / Data signal (AD0) In/Out Pulse High
20AD1Address / Data signal (AD1) In/Out Pulse High
21AD2Address / Data signal (AD2) In/Out Pulse High
22AD3Address / Data signal (AD3) In/Out Pulse High
23AD4Address / Data signal (AD4) In/Out Pulse High
24AD5Address / Data signal (AD5) In/Out Pulse High
25AD6Address / Data signal (AD6) In/Out Pulse High
26AD7Address / Data signal (AD7) In/Out Pulse High
27A8Address signal (A8) OutPulse High
28A9Address signal (A9) OutPulse High
29A10Address signal (A10) OutPulse High
30A11Address signal (A11) OutPulse High
31A12Address signal (A12) OutPulse High
32A13Address signal (A13) OutPulse High
33VSSGND —GND GND
34A14Address signal (A14) OutPulse High
35A15Address signal (A15) OutPulse High
36INIT PAD2 status ———
37VPPPAD1 status ———
38DSRData set ready signal InHigh High
39KC4Key common signal (KC4) OutPulse High
40RDOutput enable signal of RAM/ROM (RD) OutPulse High
41WRWrite enable signal of RAM (WR) OutPulse High
42RA14 Address signal of ROM (Bank 0) OutHigh High
43ASTB Latch enable for Address decoder (ASTB) OutPulse Low
44KI12 Key input signal (KI12) InHigh High
45KI13 Key input signal (KI13) InHigh High
46RA16 Address signal of ROM (Bank2) OutHigh High
47RA15 Address signal of ROM (Bank 1) OutHigh High
48MDMotor drive signal of printer (MD) OutLowLow
49DRW Drawer drive signal (DRW) OutLowLow
50BUZ Buzzer signal (BUZZ) OutLowLow
51FDPaper feed signal of printer (FD) OutLowLow
52HD.A Head drive signal of printer (HD.A) OutLowLow
53HD.B Head drive signal of printer (HD.B) OutLowLow
54HD.C Head drive signal of printer (HD.C) OutLowLow
55HD.D Head drive signal of printer (HD.D)OutLow Low
5-2.CPU (uPD78052GC-159-3B9)

— 9 —
Pin No. Signal Description In/Out Status of
Power On Status of Power OFF
56 HD.E Head drive signal of printer (HD.E) Out Low Low
57 HD.F Head drive signal of printer (HD.F) Out Low Low
58 HD.G Head drive signal of printer (HD.G) Out Low Low
59 HD.H Head drive signal of printer (HD.H) Out Low Low
60 RESET Reset signal (RESET) In High High
61 DP Dot pulse form printer (DP) In Low High
62 RP Reset pulse from printer (RP) In High High
63 OFF Mode key status (OFF) Out High Low
64 PWD Power down signal (PWD) In Low High
65 RB0 Address signal for RAM (Bank 0) Out High High
66 RB1 Address signal for RAM (Bank 1) Out High High
67 RB2 Address signal for RAM (Bank 2) Out High High
68 VDD VDD — 5 V 5 V
69 X2 System clock (5 MHz) In Pulse High
70 X1 System clock (5 MHz) In Pulse High
71 IC GND — GND GND
72 XT2 Sub system clock (32.768 KHz) In Pulse Pulse
73 XT1 Sub system clock (32.768 KHz) In Pulse Pulse
74 AVDD VDD — 5 V 5 V
75 AVREF0 VCC — GND GND
76 BAT Low battery signal In High High
77 VPP.S VPP detection signal (VPP.S) In Low Low
78 FB0 Address signal of Fiscal ROM bank 0 Out High High
79 FB1 Address signal of Fiscal ROM bank 1 Out High High
80 FB2 Address si
g
nal of Fiscal ROM bank 2 Out Hi
g
hHi
g
h

— 10 —
Pin No. Signal Description In/Out Status of
Power On Status of Power OFF
1 SW1 Not used (GND) — GND GND
2 SW2 Not used (GND) — GND GND
3 SW3 Not used (GND) — GND GND
4 SW4 Not used (GND) — GND GND
5 DOUT Data out signal to CPU Out High High
6 DIN Data in signal from CPU In Pulse High
7 VSS GND — GND GND
8 CLK Clock signal (CLK) In Pulse High
9 STB Data strobe signal (STB) In Pulse High
10 KEY1 Not used — — —
11 KEY2 Not used — — —
12 KEY3 Drawer sensor signal (DRW.S) In High High
13 KEY4 VCC — 5 V 5 V
14 VDD VCC — 5 V 5 V
15 SEG1 Display segment signal (Sa) Out Pulse Low
16 SEG2 Display segment signal (Sb) Out Pulse Low
17 SEG3 Display segment signal (Sc) Out Pulse Low
18 SEG4 Display segment signal (Sd) Out Pulse Low
19 SEG5 Display segment signal (Se) Out Pulse Low
20 SEG6 Display segment signal (Sf) Out Pulse Low
21 SEG7 Display segment signal (Sg) Out Pulse Low
22 SEG8 Display segment signal (Sdp) Out Pulse Low
23 SEG9 Display segment signal (Str) Out Pulse Low
24 SEG10 Display segment common signal (Scom) Out Pulse Low
25 SEG11 Not used Low Low
26 SEG12 Not used Low Low
27 VEE Power for display (-VN) — -32 V -32 V
28 GRD10 Display digit signal (G10) Out Pulse Low
29 GRD9 Display digit signal (G9) Out Pulse Low
30 GRD8 Display digit signal (G8) Out Pulse Low
31 GRD7 Display digit signal (G7) Out Pulse Low
32 GRD6 Display digit signal (G6) Out Pulse Low
33 GRD5 Display digit signal (G5) Out Pulse Low
34 GRD4 Display digit signal (G4) Out Pulse Low
35 GRD3 Display digit signal (G3) Out Pulse Low
36 GRD2 Display digit signal (G2) Out Pulse Low
37 GRD1 Display digit signal (G1) Out Pulse Low
38 VDD VCC — 5 V 5 V
39 LED4 Not used — Pulse Low
40 LED3 Not used — Pulse Low
41 LED2 Not used — Pulse Low
42 LED1 Not used — Pulse Low
43 VSS GND — GND GND
44 OSC S
y
stem clock
(
500 KHz
)
In Pulse Pulse
5-3. Display controller (uPD16312GB-3B4)

— 11 —
5-4. Initilize IC (Reset circuit)
VDD: Voltage of memory protection battery
To Pin No.60 of CPU
When the voltage level at Pin No.60 of CPU is not stabilized, CPU does not work properly in rare case.
Therefore, this machine uses the initialize IC for stabilizing the voltage.
Even the voltage level of VDD (Pin No.2) is changed, Pin No.1 of initilize IC outputs stabilized 5 volts.
When the VDD voltage become less than 1.9 V, the initialize IC send a reset signal to CPU.
To Pin No.64 of CPU
When the VP voltage become less than 4.8 V, the pin No.1 of IC5 become “Low” level.
Then,the transistor Q44 become OFF.
WhenQ44becomeOFF,thevoltagelebelofpinNo.64ofCPUchangesto“High”levelfrom“Low”.Then,
CPU knows power failure.
5-6. Address latch circuit
CPU uses 8 port (AD0 ~ AD7) for
address bus and data bus.
To select the address, CPU use the
IC13.
CPU send the address to IC13, and
send ASTB signal at same time.
Then, IC13 store the address and
output the address immediately.
In this way, CPU select the address
and data signal.
5-5. Power down detection circuit (PWD)

— 12 —
5-7. RAM / ROM bank selection circuit
This circuit is used for address decoder for memory.
Memory Map
C000
A000
8000
6000
4000
2000
0000
RAM BANK select
area (4 K)
E000
RAM common area
(8 K)
EP ROM
Common (16 K)
Mask ROM
(16 K)
F800
Internal RAM
(High speed access)
288 bytes
Internal RAM
(High speed access)
Short direct area
192 bytes
FE20
FFFF
FA80 Internal RAM
(High speed access)
Outer I/O area
F000 General purpose
register 32 bytes
Special function
register (SFR)
256 bytes
FEE0
FFF0
Bank
0 Bank
5
Bank
4
Bank
2
Bank
1 Bank 3
EP ROM
Bank select area
(16 K) FAE0
FD00
Buffer RAM 32 bytes FAC0
KI signal port (F800,F801)
0000000000100010 00011 00100 00101 00110
Bank
29
11101
RAM 256 K RAM 1 M

— 13 —
5-8. Head drive circuit for printer
Motor drive circuit
Normally, the transistor of motor drive circuit is followng condition.
TR1, TR2, TR5 : OFF
TR3, TR4 : ON
MD (-) signal : VP level
When the CPU want to rotate the motor, CPU change the MD signal to “High” from “Low”.
Then, TR1, TR2 and TR5 are become ON and MD (-) signal is become GND level,
and then motor is rotated.
Head drive circuit
When the CPU wants to print, CPU send “High” signal from HD.A ~ HD.H terminal.
This signal goes to printer unit, and then print.
RP: Reset pulse from printer
DP: Dot pulse from printer
TR4 TR3
TR1
TR2
TR5

— 14 —
5-9. Power supply circuit for display
This circuit is making the power for display tube.
Voltage level: -VN Est. -31.2 V
VF1 - VF2 Est. AC4.85 V

— 15 —
FEED 055 051 789 046 040 034 028 022 016
058 054 050 456 045 039 033 027 021 015
057 053 049 123 044 038 032 026 020 014
056 052 C0011 012 043 037 031 025 019 013
047 041 035 029 023 017
048 042 036 030 024 018
6. DIAGNOSTIC OPERATION
6-1. To start the diagnostic program
1. Set the mode switch to “OFF” position.
2. Pressing the “FEED” button and turn the mode switch to “PRG” position.
3. Release the “FEED” button.
4. Input “9999900000” and press “ST” (“#2” key).
5. Diagnostic program is executed.
6-2. Check item
The following test can be checked in the diagnostic test.
1. Key code test
2. Switch status test
3. Individul function test.
6-3. Operation of each test
1. Key code test
When pressing a key, the machine displays
the following key code.
HARD KEY CODE TABLE
Hard key code
0 1 3
DISPLAY
“020” buttons are work for “#2” key.

— 16 —
2. Switch status test
Press “C” button, the switch status is appeared on the display.
No display
No display
[DISPLAY]
No display
No display
Low battery
L: Low battery
Nil: Battery OK
PAD2 status
1: Short
0: Open
PAD1 status
1: Short
0: Open
Always: 1
Drawer sensor
1: Close
0: Open
Mode switch status
1: PGM
2: RF
3: REG
4: CAL
5: X
6: Z
No display: OFF

— 17 —
3. Individual function test
3-1. Series test
“Y” “X” “1” + “#2” key
Y: 0: Normal test
1: Execute next test even if an error happend at ROM check sum
X: 0: Autockecking of RAM capacity
1: 256 Kbit RAM test
2: 1 Mbit RAM test
Execute the following test in order.
1. Display test
2. Check sum test of EP-ROM
3. RAM test
4. Drawer open test
5. Printing test
6. Date and Time test
1. Display test (All segment light on)
2. Ckeck sum test of EP-ROM
Normal end Error end
XX00: Check sum value XXXX : Check sum value
3. RAM test (Read/Write test)
Normal end receipt
256 Kbit RAM 1 Mbit RAM
Error end receipt
YY: Bank
XXXX: Address
4. Drawer open test
5. Printing test
6. Date and Time test
Set the date and time as follows.
Date : 31 / 12 / 96 Time : 25:59
Then, issues a receipt and display the following character.
ROM E R
ROM SUM OK
RAM 128K R/W OKRAM 32K R/W OK
RAM 32K E R
BBBBBBBBBBBBBBBBBBBBBBBB
12. 3 4 5. 6 7 8. 9 0

— 18 —
3-2. Print test
Input “Y” “X” “2” + “#2” key.
X: 0: Print the following character continuously.
Printing speed : 45 times / Min.
1: Print the following character, open the drawer and issue a receipt
Printing speed : 25 times / Min.
Drawer open : 5 times / Min.
Receipt issue : 5 times / Min.
Y: 0: No effect
1: Print the following character without waiting time. ( Continuously print )
To stop this test, press any key or turn the mode switch to “OFF” position.
Printing sample:
3-3. RAM read only test
Input “X” “5” + “#2” key.
X: 0: Read the data from start to end address and issues receipt.
1: Read the data from start to end address continuously until power off.
Brink " - " signal on the display during checking.
Note: Be sure to execute the series test ( 1 + #2 ) before this test.
256 Kbit check receipt 1 Mbit check receipt
Display
3-4. INIT OPERATION (To set a Factory Default setting)
Input “8” “6” + “#2” key.
The machine is executed a INIT operation according to PAD status.
Set the data and time to “0”.
(00-00-00, 00:00:00)
3-5. Voltage check for Memory protection battery
Input “7” + “#2” key.
Display the battery voltage.
To stop this test, press any key or turn the mode switch to “OFF” position.
BBBBBBBBBBBB
RAM 128K READ OK RAM 32K READ OK
XXX
X.XX: Voltage value