Digi DS-685L Series, DS-685F Series Service Manual
SERVICE MANUAL
Model: DS-685L/F Series
Edition Month Year
1st March 1996
2nd May 1996
3rd April 1997
4th March 2002
5th
SHANGHAI TERAOKA ELECTRONIC CO., LTD. --- Technical Service Dept.
Ting Lin Industrial Development Zone, Jin Shan District, Shanghai P. R. China 201505
Tel: +86-21-5723-4888 Fax: +86-21-5723-9330 E-Mail:
steservice@digi-scale.com
DS-685L/F Service Manual Revised
CONTENT
1. General Specification
1.1. Model Specification --------------------------------------------------------------------- 1
1.2. Features ----------------------------------------------------------------------------------- 1
1.3. Overall View ------------------------------------------------------------------------------ 2
1.4. Dimension --------------------------------------------------------------------------------- 3
1.5. Key-Sheet Layout ----------------------------------------------------------------------- 4
1.6. Key Function ----------------------------------------------------------------------------- 4
1.6.1. Type A (8 Preset Keys) ---------------------------------------------------------- 4
1.6.2. Type B (14 Preset Keys) -------------------------------------------------------- 4
1.7. Operation Condition -------------------------------------------------------------------- 5
1.8. Charging Condition (For Rechargeable Battery Only) ------------------------- 5
1.9. Analog Specification ------------------------------------------------------------------- 5
1.10. Main Components Used ------------------------------------------------------------- 5
1.11. Capacity / Minimum Graduation / Tare Range --------------------------------- 6
1.11.1. DS-685L --------------------------------------------------------------------------- 6
1.11.2. DS-685F --------------------------------------------------------------------------- 6
2. Maintenance Mode
2.1. SPAN SW Location & Stopper Screws ------------------------------------------- 7
2.2. Internal Count & A/D Count Display ----------------------------------------------- 7
2.3. SPAN Adjustment ---------------------------------------------------------------------- 8
2.4. Escape From Calibration Mode ----------------------------------------------------- 8
2.5. Specification Setting Operation ----------------------------------------------------- 9
2.5.1. User Specification Setting (141) ----------------------------------------------- 9
2.5.2. Specification Entry (142) -------------------------------------------------------- 9
2.6. DS-685L Specification List (V1.26) ------------------------------------------------ 10
2.6.1. Customer Specification List (141) V1.26 ------------------------------------ 10
2.6.2. Weight & Measure Specification List (142) V1.26 ------------------------- 10
2.7. DS-685F Specification List (V1.06) ------------------------------------------------- 12
2.7.1. User Specification List (141) V1.06 ------------------------------------------- 12
2.7.2. For Weight & Measure (142) V1.06 ------------------------------------------- 12
2.8. Location of Sealing Screw ------------------------------------------------------------ 14
3. Error Message ------------------------------------------------------------------------------- 15
4. Hardware Detail
4.1. DS-685L ----------------------------------------------------------------------------------- 16
4.1.1. NRFI Electrical Connection Block Diagram --------------------------------- 16
1
DS-685L/F Service Manual Revised
4.1.2. RFI Electrical Connection Block Diagram ----------------------------------- 16
4.1.3. Microcomputer Pin Assignment ------------------------------------------------ 17
4.2. DS-685F ----------------------------------------------------------------------------------- 19
4.2.1. NRFI Electrical Connection Block Diagram --------------------------------- 19
4.2.2. RFI Electrical Connection Block Diagram ----------------------------------- 19
4.2.3. Microcomputer Pin Assignment ------------------------------------------------ 20
5. Circuitry Diagram ---------------------------------------------------------------------------- 22
2
CONTENT
I. INTRODUCTION
1. Feature ........................................................................................................ I-1
II. SPECIFICATION
1. General specification
1.1 Overall view ................................................................................. II-1
1.2 Dimension ................................................................................. II-2
1.3 Model specification ..................................................................... II-3
1.4 Operation condition ……………………………………………… II-3
1.5 Main components used ……………………………………………… II-3
1.6 Capacity / Minimum graduation / Tare range ……………………… II-4
III. INITIAL SETUP
1. Specification setting
1.1 Specification entry (141) ..................................................................... III-1
1.2 Specification entry (142) ..................................................................... III-2
1.3 Specification list of DS-685 (Version 1.21) ……................................... III-3
1.4 Specification list of DS-685F (Version 1.00) …………………………..
III-6
2. Key layout and function
2.1 8 preset key type ..................................................................... III-9
3. Location of sealing screw ................................................................................. III-11
4. Set up procedure ………................................................................................. III-11
IV. ADJUSTMENTS
1. Span enable switch setting ................................................................................. IV-1
2. Internal count and A/D count ...................................................................... IV-1
3. Span adjustment ............................................................................................. IV-1
4. Escape from maintenance mode ...................................................................... IV-2
5. Error message ............................................................................................. IV-3
V. ELECTRICAL CIRCUITRY
1. DS-685
2. DS-685F
DS-685L/F Series Service Manual
Page No. 1
1. General Specification
1.1. Model specification
z Model Name: DS-685L / DS-685F
z Display Resolution: 1/3,000
z Internal Resolution: 1/30,000 (DS-685)
1/60,000 (DS-685F)
z Platter Size: 300mm x 225mm (11.8” x 8.8”)
z Display: Double-sided display
A) LCD display version
Weight - 5 digits
Unit Price - 5 digits / - 6 digits (1 fixed zero) / - 7 digits (2 fixed zeros)
Total Price - 6 digits / - 7 digits (1 fixed zero) / - 8 digits (2 fixed zeros)
B) FIP display version
Weight display - 5 digits
Unit price display - 5 digits
Total price display - 6 digits
1.2. Features
DS-685 offers the following features:
z Low cost digital price computing scale
z Quick response to weight changes
z Capacity: 3kg, 6kg, 15kg, 30kg, 30lb
z Resolution:
A) DS-685 (LCD display): Display resolution 1/3,000, Internal resolution 1/30,000.
B) DS-685F (FIP display): Display resolution 1/3000, Internal resolution 1/60,000.
z Low power consumption:
A) DS-685 (LCD display): 6 x D size dry battery back up for more than 500 hours of
continuous usage.
B) DS-685F (FIP display): Rechargeable battery backup for 8 hours of continuous
usage. (Optional)
z Battery low detection
A) DS-685L (LCD Display)
Two –Point lower detect for Dry Battery
* When battery is weak, the battery indicator will light up.
* When the power from battery becomes lower, scale cannot compute accurately,
all display will shut off except the battery indicator. The power is then shut off
completely after 1 minute.
DS-685L/F Series Service Manual
Page No. 2
B) DS-685F (FIP Display)
Four-Point battery status detect (Rechargeable battery)
* When battery is weak, the battery indicator will light up.
* When the power from battery becomes lower, scale cannot compute accurately,
all displays will shut off except the battery indicator. The power is then shut off
completely after 1 minute.
* When battery needs to charge and AC power available, battery will be charged.
* Automatically stop charging when battery is fully charged.
z Calibration by software
z Splash water proof
z Customer and operator displays (optional customer pole display)
z 30 keys: ON/OFF key, 10 Numeric keys, 11/5 Operational keys, 8/14 Preset keys
z Plastic housing
z Display Tube:
DS-685L: High contrast LCD display
DS-685F: FIP display
1.3. Overall view
DS-685 Bench type DS-685 Pole type
DS-685L/F Series Service Manual
Page No. 3
1.4. Dimension
DS-685 Bench type
DS-685 Pole type
DS-685L/F Series Service Manual
Page No. 4
1.5. Key-Sheet Layout
Keysheet Type A
Keysheet Type B
1.6. Key Function
1.6.1. Type A (8 Preset Keys)
: ON/OFF key. Turn the power ON or OFF.
to
: PRESET keys. Set up or call either unit price.
to
: Numeric keys. Input numeric value.
: TARE key. Set or clear tare value.
: CLEAR key. Clear numerical values.
: AUTO key. Select whether or not to clear a unit price (and/or) tare value.
: Multiple key, Register the same non-weighing product multiple times.
: HOLD key. Holds the display value for 8 seconds.
: MINUS key. Correction operation on products.
: AMT/TEND key. Used to enter amount tendered. Two different types of AMT/TEND
operation can be selected by SPEC 9 BIT 3.
: PLUS key. Adds sum, accumulated sum.
: RE-ZERO key. Resets weight display to zero.
: MODE SET key. Switch into following modes: Program & Grand Total Check Mode.
: Data Setting key. Set up or clear mode.
1.6.2. Type B (14 Preset Keys)
: ON/OFF key. Turn the power ON or OFF.
to
: PRESET keys. Set up or call either unit price.
to
: Numeric keys. Input numerical value.
: TARE key. Set or clear tare value.
: CLEAR key. Clear numerical values.
: RE-ZERO key. Resets weight display to zero.
: MODE SET key. Switch into Program Mode.
: Data Setting key. Set up or clear mode.
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