Acroprint ATR120 User manual

Service Manual
QUARTZ TIME RECORDER
ATR120
Acroprint Time Recorder Co.
5640 Departure Drive
Raleigh, NC 27616 USA
Phone: [phone]
06-0394-000 Rev. B Fax: [phone]

CONTENTS
1 OUTLINE----------------------------------------------------------------------------------------------------------------------------1
2 BLOCK DIAGRAM----------------------------------------------------------------------------------------------------------------2
3 DISASSEMBLYAND REASSEMBLY OF BASIC PARTS------------------------------------------------------------------3
3-1. Exploded------------------------------------------------------------------------------------------------------------------------4
3-2. Tools Required-----------------------------------------------------------------------------------------------------------------5
3-3. Disassembly--------------------------------------------------------------------------------------------------------------------6
3-4. Reassembly-------------------------------------------------------------------------------------------------------------------10
4 DISASSEMBLYAND REASSEMBLY OF MECHANISM-----------------------------------------------------------------11
4-1. Exploded----------------------------------------------------------------------------------------------------------------------12
4-2. Tools, Oil and Detergent----------------------------------------------------------------------------------------------------13
4-3. Disassembly-------------------------------------------------------------------------------------------------------------------14
4-4. Reassembly-------------------------------------------------------------------------------------------------------------------29
5 TROUBLESHOOTING-----------------------------------------------------------------------------------------------------------30
5-1. No Operation At All---------------------------------------------------------------------------------------------------------31
5-2. No Display--------------------------------------------------------------------------------------------------------------------32
5-3. Motor Operation Full--------------------------------------------------------------------------------------------------------34
5-4. No Printing-------------------------------------------------------------------------------------------------------------------35
5-5. Changing Red and Black Ribbons Failure-------------------------------------------------------------------------------36
5-6. Column Key Malfunctioning ----------------------------------------------------------------------------------------------37
5-7. Relay Failure-----------------------------------------------------------------------------------------------------------------38
5-8. Piezoelectric Buzzer Failure------------------------------------------------------------------------------------------------39
5-9. No Power Backup in Case of Power Failure-----------------------------------------------------------------------------40
5-10. How to Locate Problem From Error Codes-----------------------------------------------------------------------------42
6 FUSE REPLACEMENT----------------------------------------------------------------------------------------------------------45
7 MEASUREMENT-----------------------------------------------------------------------------------------------------------------46
7-1. Voltage Check----------------------------------------------------------------------------------------------------------------47
7-2. Measuring Voltage at NiCd Battery Terminals--------------------------------------------------------------------------48
7-3. Motor Operation Check-----------------------------------------------------------------------------------------------------48
7-4. Head Resistance Measurement---------------------------------------------------------------------------------------------49
8 CONTROL CIRCUIT OPERATION--------------------------------------------------------------------------------------------50
8-1. Control Circuit Board Ass’y------------------------------------------------------------------------------------------------51
8-2. One-chip microprocessor---------------------------------------------------------------------------------------------------51
8-3. Circuit Block Diagram------------------------------------------------------------------------------------------------------52
8-4. Port List-----------------------------------------------------------------------------------------------------------------------53
8-5. CPU Operation---------------------------------------------------------------------------------------------------------------54
8-6. Status and Operation in Case of Power Failure--------------------------------------------------------------------------55
8-7. Key Switch and LED lights------------------------------------------------------------------------------------------------56
8-8. LCD Panel--------------------------------------------------------------------------------------------------------------------56
8-9. Sensor Circuit----------------------------------------------------------------------------------------------------------------56
8-10. Motor Drover Circuit------------------------------------------------------------------------------------------------------57
8-11. Head Pin Driver Circuit---------------------------------------------------------------------------------------------------58
8-12. Piezoelectric Buzzer Circuit----------------------------------------------------------------------------------------------58
8-13. Relay Control Circuit------------------------------------------------------------------------------------------------------58
8-14. Panel Switch and Mechanical Switch Circuit--------------------------------------------------------------------------58

9 POWER SUPLLY CIRCUIT-----------------------------------------------------------------------------------------------------59
9-1. General------------------------------------------------------------------------------------------------------------------------60
9-2. Operations---------------------------------------------------------------------------------------------------------------------60
9-3. Output--------------------------------------------------------------------------------------------------------------------------61
9-4. Changing Circuit-------------------------------------------------------------------------------------------------------------61
9-5. Output Voltage----------------------------------------------------------------------------------------------------------------61
9-6. Flow of Repair----------------------------------------------------------------------------------------------------------------62
9-7. Abnormal Test Results-------------------------------------------------------------------------------------------------------63
10 ERROR CODE LIST-------------------------------------------------------------------------------------------------------------64
11 CONNECTOR PIN ASSIGNMENT-------------------------------------------------------------------------------------------65
12 CIRCIUT DIAGRAM------------------------------------------------------------------------------------------------------------67
13 PARTS LIST-----------------------------------------------------------------------------------------------------------------------71
13-1. Overall Explode View------------------------------------------------------------------------------------------------------72
13-2. Mechanism------------------------------------------------------------------------------------------------------------------73
13-3. Control PCB Assembly----------------------------------------------------------------------------------------------------75
13-4. Packing Material------------------------------------------------------------------------------------------------------------78
13-5. Option Function BOM-----------------------------------------------------------------------------------------------------79
Note: This service manual is for the mode ATR120 made in IC 74HD4889H33B.

1 OUTLINE
Take special care to avoid electric shock when repairing.
Note: Some part names are different between this Service Manual and the Instraction Manual/Operation Manual.

2 BLOCK DIAGRAM

3 DISASSEMBLYAND REASSEMBLY OF BASIC PARTS
CONTENTS
3-1. Exploded
3-2. Tools Required
3-3. Disassembly
Remove Front Enclosure
Remove KeyBoard PCB Ass’y
Remove Clock Enclosure and Clock
Remove Ribbon
Remove Back Enclosure and Small Back Cover
Remove LCD PCB Ass’y
Remove Main Control PCB Ass’y
3-4. Reassembly

3- 1. Exploded

3-2. Tools Required
 Phillips type screwdriver No.2(general use)
 Solder
3-3. Disassembly
Before disassembly and reassembly, turn the power off by disconnecting theAC cable to avoid electric shocks.
Disassembly the parts in the following order:
Remove Front Enclosure 
Remove Ribbon ---
Remove Active Enclosure and Quartz ---
Remove Back Enclosure ---
Remove KeyBoard PCB Ass’y ------
Remove LCD PCB Ass’y ------
Remove Main Control PCB Ass’y ------


Remove Front Enclosure
1. Pull theAC plug off from the outlet, downward the back of the unit..
2. Remove the screws 
A
Screw 
A
: P.H. Screw with SPW M3×8 (NTR-07-004)

3. Set up the unit, press the two place and push out the Front Enclosure



Remove Ribbon
1. Remove and discard the pin and clip .
2. Remove the ribbon by hand.


RemoveActive Enclosure and Quartz
1. Remove the screw 
B
and clip. screw 
B
: P.H.T. Screw ST3×7 (NTR-07-012)
2. Remove the Active Enclosure.
3. Remove the Cover A, Second Hand, Minute hand, Hour Hand, Cuprum Cushion, and the Quartz, Rubber
Cushion.



Remove Back Enclosure
1. Remove the screw 
C
.
screw 
C
: P.H. Screw M4×10 (NTR-07-011)
2. Disconnect the KeyBoard FFC
3. Remove Back Enclosure


Remove KeyBoard PCB Ass’y
1. Remove the screw 
B
and clip.
screw 
B
: P.H.T. Screw ST3×7 (NTR-07-012)
2. Remove the KeyBoard PCB Ass’y.



Remove LCD PCB Ass’y
1.Disconnect the LCD FFC from the connector in the LCD PCB Ass’y.
2. Remove the screw 
D
. screw 
D
: P.H. Screw with SPW M3×6 (NTR-07-002)
3. Remove the LCD PCBAss’y.


Remove Main Control PCB Ass’y
1. Remove all the Connector and the FFC.
2. Remove the screws 
E
.
Screw 
E
: P.H. Screw with SPW M3×7 (NTR-07-003)
3. Remove the AC cable from the Main Control PCBAss’y by solder.

3-4. Reassembly
Reassembly the parts in the reverse procedure to disassembly.
Follow the instructions below when reassembling the parts:
Connect the connectors and tighten the screws securely.
When attaching the parts, be careful not to catch or cut the harnesses or cables.
After reassembly, check the functions to make sure that all the parts have been assembled properly.

4 DISASSEMBLYAND REASSEMBLY OF MECHANISM
CONTENTS
4-1. Exploded
4-2. Tools, Oils and Detergent Required
4-3. Disassembly
4-4. Reassembly

4-1. Exploded

4-2. Tools, Oils and Detergent Required
Tools required
 Phillips type screwdriver for M3 screws
 Phillips type screwdriver for M2.6 screws(for the motor and platen shaft)
 Standard type screwdriver, tip blade thickness:1mm or less (for FPC guide and gears)
 Small pliers(for snap rings)
 Tweezers(for small parts)
Oils required
 CL-21
 SF-100
Detergent required
Alcohol(for cleaning the parts)
Note: To clean the parts, wipe them with a soft cloth, etc. moistened with alcohol. Do not dip
any parts directly in alcohol.

4-3. Disassembly
Disassembly the parts in the following order:
Print Head
Card inlet 
Sensor harness assembly ---
LF reduction gear 
Mid gear
Roller gear
Motor block 
Lever holding spring
Cassette holding plate R 
Ribbon cam spring
Ribbon cam ---
Cam gear ------
Reduction gear
Change gear
Gear guite
Lead screw gear 
Paper feed shaft ---
Bearing A (of paper feed shaft)
Card guide ------
Card guide B
Carrier auxiliary board ---
Ribbon drive shaft
Ribbon clutch gear
Ribbon clutch spring
Bearing B (of ribbon drive shaft)
Lead screw assembly ------------------
Platen bearing
Lead screw top
Carrier ---------
Guide pillar
Friction Spring 
Friction shaft
Friction roller
Switch lever 
Switch lever B
Platen 
Platen shaft



Remove Print Head
1. Remove the FPC guide in the direction of the arrow Ausing a standard type screwdriver.
2. Disconnect the FPC cable from the connector on the Main Control PCB Ass’y. (Make sure that the
FPC cable is disconnected from the connector on the Main Control PCB Ass’y)
3. Pull the Head toward the front in the direction of arrow B. Lift it to remove.


Remove the Card inlet
Remove the four screws 
Efixing the card inlet, and lower right parts, then remove the Card inlet.
Screw 
E: P.H. Screw with SPW M3×7 (NTR-07-003) 4PCS



Remove Sensor harness assembly
1. Disconnect the sensor harness assembly from the connector on the Main Control PCB Ass’y. (Make sure that
the harness assembly is disconnected from the connector on the Main Control PCB Ass’y)
2. Press the hooks of the right and left sensors slightly outwards in the direction of arrow A and pull out the
Sensors in the direction of arrow B. Be careful not to break the hooks.



Remove the LF reduction gears, Mid gear, and Roller gear
1. Remove the Snap rings 
J
. Pull the two LF reduction gears our of the shaft. (Insert a standard type
screwdriver into the gap between the LF reduction gear and frame, and lift the gear)
2. Remove the Snap rings 
J
. Remove the Mid gear in the same manner as shown in step 1 above.
3. Remove the Snap rings 
J
. Remove the Roller Gear in the same manner as shown in step 1 above.
snap rings 
J
: BE-24; 3PCS