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SERVICE MANUAL Model: DS-685L/F Series Edition Month Year 1st March 1996 nd May 1996 rd April 1997 4 th March 2002 5 th 2 3 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: [email protected] 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 ..................................................................... 1.4 Operation condition ……………………………………………… 1.5 Main components used ……………………………………………… 1.6 Capacity / Minimum graduation / Tare range ……………………… II-3 II-3 II-3 II-4 III. INITIAL SETUP 1. Specification setting 1.1 Specification entry (141) ..................................................................... 1.2 Specification entry (142) ..................................................................... 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 ..................................................................... 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 3. Span adjustment ............................................................................................. IV-1 4. Escape from maintenance mode 5. Error message 2. DS-685F ...................................................................... IV-2 ............................................................................................. IV-3 V. ELECTRICAL CIRCUITRY 1. DS-685 ...................................................................... IV-1 III-1 III-2 III-9 DS-685L/F Series Service Manual 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. Page No. 1 DS-685L/F Series Service Manual 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 Page No. 2 DS-685L/F Series Service Manual 1.4. Dimension DS-685 Bench type DS-685 Pole type Page No. 3 DS-685L/F Series Service Manual 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. Page No. 4 DS-685L/F Series Service Manual 1.7. Operation Condition z Power source a) DS-685L: AC 240/230/220V, 117/100V (+10%, -15%) (Factory Set) DC 6 x D size dry battery (9V) b) DS-685F: AC 240/230/220V, 117/100V (+10%, -15%) (Factory Set) DC 12V 3Ah rechargeable battery (optional) z Operating Temperature: -10oC to +40oC z Operating Humidity: 15% to 85% RH z Power Consumption a) DS-685L: 1.5W for AC Power / 0.1W for Dry Battery b) DS-685F: 18W for AC Power / 3.6W for Rechargeable Battery 1.8. Charging Condition (For Rechargeable Battery Only) a) DS-685L Power Source: DC 8V from charger Charging Current: 800mA Charging Time: 12 ~ 14 hours b) DS-685F Power Source: AC 240/230/220V, 117/100V. (Factory set) Charging Current: 800mA Charging Time: 18 ~20 hours 1.9. Analog Specification z Input Sensitivity: 1mV/V z Zero Adjustment Range: 0 ~+/-2.5mV z Zero Balance Range: 0 ~ +/-0.5mV z L/C Exciting Voltage: DC 5V z A/D Conversion Speed: 3 times/sec z Internal Resolution: 1/30,000 (DS-685L), 1/60,000 (DS-685F) 1.10. Main components used z Microcomputer: DS-685L: NEC uPD75308GF (4 Bit, 8K PROM) or NEC Upd75304GF (4Bit, 4K ROM) DS-685F: NEC uPD75P216ACW (4 BIT 16K PROM) or NEC uPD75212ACW (4 BIT 12K ROM) z Crystal Oscillator: 4.19 MHz z Display Device: DS-685L: Liquid Crystal Display (LCD) DS-685F: Vacuum Fluorescent Display (FIP) z Load Cell: 1K resistance load cell (OIML) Page No. 5 DS-685L/F Series Service Manual 1.11. Capacity / Minimum Graduation / Tare Range 1.11.1. DS-685L * Single interval Capacity 3 kg 6 kg 15 kg 30 kg 30 lb Minimum Graduation 1g (1e = 10IR) 2g (1e = 10IR) 5g (1e = 10IR) 10g (1e = 10IR) 0.01lb (1e = 10IR) Tare Range 0 - 1.499kg 0 - 2.998kg 0 - 7.495kg 0 - 14.99kg 0 - 14.99lb * Multi-interval Capacity Minimum Graduation Tare Range 1g (1e = 10IR) 3 kg (0 3 kg) 1g (1e = 5IR) (3 - 6 kg) - 2g (1e = 10IR) 6 kg (0 - 6 kg) - 2g (1e = 4IR) (6 - 15 kg) - 5g (1e = 10IR) 15 kg (0 15 kg) 5g (1e = 5IR) (15 - 30 kg) - 10g (1e = 10IR) 30 kg (0 - 15 lb) - 0.005lb (1e = 5IR) (15 - 30 lb) - 0.01lb (1e = 10IR) 30 lb Note: IR = Internal Resolution, e = division (minimum increment) 0 - 1.499kg 0 - 2.999kg 0 - 5.998kg 0 - 9.995kg 0 - 9.995lb Internal count (full capacity) = 30000IR 1.11.2. DS-685F * Single interval Capacity 3 kg 6 kg 15 kg 30 kg 30 lb Minimum Graduation 1g (1e = 20IR) 2g (1e = 20IR) 5g (1e = 20IR) 10g (1e = 20IR) 0.01lb (1e = 20IR) Tare Range 0 - 1.499kg 0 - 2.998kg 0 - 7.495kg 0 - 14.99kg 0 - 14.99lb * Multi-interval Capacity 3 kg 6 kg 15 kg 30 kg 30 lb Minimum Graduation 1g (1e = 10IR) Tare Range 0 - 1.499kg (0 - 3 kg) - 1g (1e = 10IR) (3 - 6 kg) - 2g (1e = 20IR) 0 - 2.999kg (0 - 6 kg) - 2g (1e = 8IR) (6 - 15 kg) - 5g (1e = 20IR) (0 - 15 kg) - 5g (1e = 10IR) (15 - 30 kg) - 10g (1e = 20IR) (0 - 15 lb ) - 0.005lb (1e = 10IR) (15 - 30 lb) - 0.01lb (1e = 20IR) 0 - 5.998kg Note: IR = Internal Resolution, e = division (minimum increment) Internal count (full capacity) = 60,000IR Page No. 6 0 - 9.995kg 0 - 9.995lb DS-685L/F Series Service Manual 2. Maintenance Mode 2.1. SPAN SW Location & Stopper Screws Before setting up of DS-685, remove the “LOADCELL STOPPER” from the bottom of the scale as shown in the diagram below. Load Cell Stoppers Hole For SPAN Switch Please remove the “ Load Cell Stoppers”, before processing for calibration: 1. Place platter on the platter support. 2. Turn on the scale power supply and check the scale functional. 3. Before calibration, use a small insulate rod to switch on the SPAN-SW, which is at the bottom of the scale (as shown above diagram). 4. Refer to Calibration Operation for further detail. 2.2. Internal Count & A/D Count Display 1 - ZERO 2 - NET 3 - HOLD Operation [Re-Zero] + [0] [0] [9] [T] 4 - AUTO Weight 5 - MEMORY U. Price 6 - BATTERY T. Price 1 88888 88888 888888 DS685 4890 0 0.0 0 0 0.0 0 0.0 0 2 3 4 5 6 Remarks Enter 0 0 9 while depressing [Re-Zero] U.Price window display A/D count, Total Price window displays Internal Count 'T' key back to Weighing mode a) Please make sure that nothing has been placed on the platter during internal count checking. b) In order to call up the internal count mode, enter [0] [0] [9] while depressing [Re-Zero] key. c) The display shows count in the “UNIT PRICE” column for A/D data count and “TOTAL PRICE” column for internal count. Page No. 7 DS-685L/F Series Service Manual z DS-685L Zero internal count should be 4,800 +/- 300, if you can not get 4,800 +/- 300 count, do span adjustment again. z DS-685F Zero internal count should be 9,600 +/- 300, if you can not get 9,600 +/- 300 count, do span adjustment again. d) Depress “ T “ key to exit “INTERNAL COUNT AND A/D COUNT” mode. 2.3. SPAN Adjustment 1 - ZERO 2 - NET 3 - HOLD Operation 4 - AUTO Weight U. Price 0.0 0 0 SPAN Switch ON 5 - MEMORY 6 - BATTERY T. Price 0. 0 0 0.0 0 D S 6 8 5 V r x. x x S-On 1 2 3 4 5 6 Weighing mode Enter 8 7 1 5 while depressing [Re-Zero] 88888 88888 888888 [Re-Zero] + [8][7][1][5] CAL00 [*] - - - - - After few second CALSP Load Weight [ * ] - - - - - After calibration 1 5.0 0 0 Remarks Ensure no weight on platter, Calibrating zero point Put full capacity weight on platter (e.g. 15kg) Calibrating Span 0.0 0 Back to Weighing mode 0.0 0 2.4. Escape Form Calibration Mode 1 - ZERO 2 - NET 3 - HOLD Operation 4 - AUTO Weight 0.0 0 0 SPAN Switch ON [T] 5 - MEMORY U. Price 6 - BATTERY T. Price 0. 0 0 0.0 0 D S 6 8 5 V r x. x x S-On 0.0 0 0 0. 0 0 0.0 0 SPAN Switch ON D S 6 8 5 V r x. x x S-On [Re-Zero] + [8][7][1][5] 88888 88888 888888 1 2 3 4 5 6 Remarks Weighing mode Escape to Weighing mode Enter 8 7 1 5 while pressing [Re-Zero] CAL00 [T] 0.0 0 0 0. 0 0 0.0 0 SPAN Switch ON D S 6 8 5 V r x. x x S-On [Re-Zero] 88888 [Re-Zero] + [8][7][1][5] CAL00 Enter 8 7 1 5 while pressing [RE-ZERO] Ensure no weight on platter, [ * ] - - - - - Calibrating zero point 88888 888888 Escape CALSP [T] 0.0 0 0 0. 0 0 0.0 0 Page No. 8 Escape to Weighing mode DS-685L/F Series Service Manual 2.5. Specification Setting Operation 2.5.1. User Specification Setting (141) 1 - ZERO 2 - NET 3 - HOLD Operation 4 - AUTO Weight 5 - MEMORY 6 - BATTERY U. Price T. Price Remarks [Re-Zero]+[1][4][1] SPC00 0000 0000 Enter [1] [4] [1] while depressing [ReZero] [+] SPC01 0000 0000 [+] Key only increase specification count, It does not update spec data [-] SPC00 0000 0000 [-] Key only decrease specification count, it does not update spec data [0][1][0][1] SPC00 0000 0101 Only [1] & [0] key are enable [*] SPC01 0000 0000 [*] Key to store specification [-] SPC00 0101 0000 [T] 0.0 0 0 0.0 0 0.0 0 Store SPECS to EEPROM & escape to weighing mode Note: For 12 Preset-Keys type, please press preset-key 12# instead of [+] key, and press preset-key 11# instead of [-] key. 2.5.2. Specification entry (142) Note: It can only work when SPAN SWITCH is on (Enable) Operation Weight U. Price T. Price [Re-Zero]+[1][4][2] SPC08 0000 0000 Enter [1][4][2] while depressing [Re-Zero] [+] SPC09 0000 0000 [+] key only increase spec number [+] SPC10 0000 0000 it does not update spec data [1][0][1][1] SPC10 0000 1011 only [1] & [0] KEY are enable [*] SPC11 0000 0000 [*] to store specification [-] key only decrease specification number, does not update Spec data [-] SPC10 1011 0000 [+] SPC11 0000 0000 [1][1][1][1] SPC11 0000 1111 [C] SPC11 0000 0000 [1][0][1][0] SPC11 0000 1010 [*] SPC12 0000 0000 [+] SPC13 [T] 0.0 0 0 0000 Remarks [*] KEY to store specification 0000 0.0 0 0.0 0 Store SPECS to EEPROM & escape to weighing mode Note: For 12 Preset-Keys type, please press preset-key 12# instead of [+] key, press preset-key 11# instead of [-] key. Page No. 9 DS-685L/F Series Service Manual 2.6. DS-685L Specification list (Version 1.26) 2.6.1. Customer Specification List (1 41) V1.26 SPEC Bit 3 Bit 2 Bit 1 Bit 0 Power Auto Off function (When no key operation & weigh operation) 00 0000: No Auto Power Off Function 0001: 3 minute 0010: 10 minutes 0011: 30 minutes 0100: 1 hour 0101: 3 hours 0110 ~ 1111: Not used Buzzer 01 0: On 1: Off Not Used Not Used Not Used Not Used Not Used Multi-Currency (Convert National Currency to “EURO”) *V1.22 02 00: No Conversion 01: Method 1 10: Method 2 11: Not used Decimal Point Position on EURO conversion Rate 03 000: 7th digit (0.000000) 001: 6th digit (0.00000) 010: 5th digit (00.0000) *V1.25 011: 4th digit (000.000) 100: 3rd digit (0000.00) 101 ~ 111: Not used Not Used 2.6.2. Weight & Measure Specification List (1 4 2) V1.26 Note: It can only work when the SPAN Switch is on (Enable) SPEC Bit 3 Bit 2 Bit 1 Bit 0 Price Base: 08 0000: $/kg 0001: $/100g AMT/TEMD Operation 09 0: Method B 1: Method A Zero Lamp "On" 10 11 0010: $/lb 0011 ~ 1111: Not used G.T. Correct Key-Sheet Layout 0: Enable 1: Disable 0: 6/8 Preset Keys 1: 14 Preset Keys Scale Start Auto Operation 0: Automatic 0: Gross 0 1: Manual 1: Net 0 Decimal Point Position On Weight Display 00: No decimal point 01: Not used 10: 3rd digit (000.00) 11: 4th digit (00.000) 0: No 1: Yes Display Hold 0: NO 0: No 1: YES 1: Yes Decimal Point Position On Unit And Total Price Display 00: No decimal point 01: 2nd digit (0000.0) 10: 3rd digit (000.00) 11: Not used Minus Weight Display Mask 12 IR Mode Protected By SPAN SW Fixed Zero At The End Of Unit And Total Price Display 00: Minus gross > 9e 01: Minus gross Weight 10: Minus Net Weight 11: Not used 00: NO fixed zero 01: 1 fixed zero Page No. 10 10: 2 fixed zero 11: Not used DS-685L/F Series Service Manual SPEC Bit 3 Bit 2 Bit 1 Bit 0 Selection Of Capacity 13 0000: 3000: (3.000kg, 30.00kg, 30.00lb) 0001: 6000: (6.000kg) 0011: 15000: (15.000kg) 0101: 30000: (30.000kg, 30.000lb) 1000: 30000: (30.000kg) Selection Of Resolution 14 00: Single Interval 01: Multi Interval 10: 1/7500 or 1/6000 11: Not Used Additional Rounding For Total Price 15 00: NO Additional Rounding 01: 1/4 Rounding (25 step) 10: Special Rounding (5 step) 11: Rounding For 1ST Digit 1-------, -------2 / 1(0~3000) , 2(3000~6000) 5 / 2(0~6000) , 5(6000~15000) 10 / 5(0~15000), 10(15000~30000) 10 - - - - - - - , -------Multi-Interval Setting For Selection Of Model 0: Net 1: Gross 0: DS-685 1: DS-688 Rounding For Total Price Selection Of Segment-Check Style *V1.21 0: Rounding 1: Truncation *V1.21 0: Fast 1: Standard Manual Tare Clear Tare Subtraction Tare Accumulation Re-zero Function 16 0: Enable 1: Disable 0: Allow 1: Inhibit 0: Allow 1: Inhibit 0: Allow 1: Inhibit 17 Digital Tare Accumulation When Tare Zero Tracking When Tare Weight Reset When Tare 0: Enable 1: Disable 0: Inhibit 1: Allow 0: Allow 1: Inhibit Tare Value Exchange AUTO Tare Clear When Re-zero Tare AUTO Clear Unit Price AUTO Clear 0: Allow 1: Inhibit 0: No 1: Yes AUTO Clear Condition WT Data Synchronization (+ Key) Accumulation Number Display Management Mode (Grand Total) 0: >= Gross 21e & >= Net 5e 1: >=Net 1e & price not 0 0: No 1: Yes 0: No 1: Yes 0: Enable 1: Disable Accumulation Subtraction Multiplication Tender Or Change 0: Allow 1: Inhibit 0: Allow 1: Inhibit 0: Allow 1: Inhibit 0: Allow 1: Inhibit Exit From Accumulation Mode After 15 Sec Accumulation When Exit From Accumulation Mode Weight Not Removed When Weight Change 0: Allow 1: Inhibit 0: No 1: Yes 0: Enable 1: Disable 18 19 20 21 0: No 1: Yes 22 Tax *V1.22 0: Inhibit 1: Allow 23 Start Range 00: +-10% FS 01: +-5% FS Key Layout 0: Inhibit 1: Allow *V1.26 0: Inhibit 1: Allow Accumulation When Weight Change < +/10e 0: Disable 1: Enable *V1.22 0: Standard 1: Japan Not Used Not Used Not Used Not Used *V1.26 10: +-3% FS 11: +-2% FS Page No. 11 DS-685L/F Series Service Manual 2.7. DS-685F Specification List (version 1.06) 2.7.1. User Specification List (1 4 1) V1.06 SPEC Bit 3 Bit 2 Bit 1 Bit 0 Power Auto Off function (for no key operation & weigh operation) 0 1 0000 – No Auto power off function 0001 - 3 minute 0010 - 10 minutes 0011 - 30 minutes 0100 - 1 hour 0101 - 3 hours 0110 ~ 1111 - Not used Buzzer FIP Brightness Levels (Varying Levels For Different Brightness) 0 - On 1 - Off 000 - Highest Brightness Level | 111 - Lowest Brightness Level Multi-Currency (Convert to “EURO”) *V1.02 2 00 - No Multi-Currency 01 - Method 1 Not Used 10 - Method 2 11 - Not used Decimal Point Position on EURO conversion Rate 3 000 - 7th digit (0.000000) 001 - 6th digit (0.00000) 010 - 5th digit (00.0000) Not Used *V1.05 011 - 4th digit (000.000) 100 - 3rd digit (0000.00) 101 ~ 111 - Not used Not Used 2.7.2. For Weight & Measure - (1 4 2) V1.06 NOTE: It can only work when the SPAN Switch is on (Enable) SPEC Bit 3 Bit 2 Bit 1 Bit 0 Price Base 8 0000 - $/kg 0001 - $/100g 0010 - $/lb 0011 ~ 1111 - Not used AMT/TEMD Operation G.T. Correction 9 10 Key Layout IR Mode Protected By SPAN SW 0 - Method B 1 - Method A 0 - Allow 1 - Inhibit 0 - 6/8 Preset Keys 1 - 14 Preset Keys ZERO Lamp ON Scale Start Auto Operation Display Hold 0 - Gross 0 1 - Net 0 0 - Automatic 1 - Manual 0 - NO 1 - YES 0 - NO 1 - YES Decimal Point Position On Weight Display 0 - NO 1 - YES Decimal Point Position On Unit And Total Price Display 11 00 - No decimal point 01 - 2nd digit (0000.0) 10 - 3rd digit (000.00) 11 - 4th digit (00.000) 12 Negative Weight Display Mask Decimal Point Form Tax 00 - Minus gross >9e 01 - Minus gross 0 - Period (.) 1 - Comma (,) 0 - NO 1 - YES 00 - No decimal point 01 - 2nd digit (0000.0) 10 - 3rd digit (000.00) 11 - 4th digit (00.000) 10 - Minus Net 11 - Not used *V1.02 Selection Of Capacity 13 0000 - 3000 - (3.000kg, 30.00kg, 30.00lb) 0001 - 6000 - (6.000kg) 0011 - 15000 - (15.000kg) 0101 - 30000 - (30.000kg, 30.000lb) 1000 - 30000 - (30.000kg) Page No. 12 1 -------, -------2 / 1(0~3000) , 2(3000~6000) 5 / 2(0~6000) , 5(6000~15000) 10 / 5(0~15000), 10(15000~30000) 10 - - - - - - - , -------- DS-685L/F Series Service Manual SPEC 14 Bit 3 Bit 2 Bit 1 Selection Of Resolution Multi-Interval Setting Selection Of Model 00 - Single Interval 01 - Multi Interval 0 - DS-685 0 - Net Multi-Interval 1 -Gross Multi-Interval 1 - DS-688 10 - 1/7500 Or 1/6000 11 - Not Used Rounding For Total Price Additional Rounding For Total Price 15 16 17 000 - NO Additional Rounding 001 - 1/4 Rounding (25 step) 010 - Special Rounding (5 step) 19 20 21 22 23 Segment-Check Style Tare Subtraction Tare Accumulation 0 - Allow 1 - Inhibit 0 - Allow 1 - Inhibit 0 - Allow 1 - Inhibit Digital Tare Accumulation When Tare Zero Tracking When Tare Weight Reset When Tare 0 - Allow 1 - Inhibit 0 - Inhibit 1 - Allow 0 - Allow 1 - Inhibit Tare Value Exchange AUTO Tare Clear When Re-zero 0 - Allow 0 - Inhibit 1 - Inhibit 1 - Alow Tare AUTO Clear Unit Price AUTO Clear Auto Clear Condition WT Data Synchro. (+ Key only) 0 - >= Gross 21e 0 - NO & >= Net 5e 1 - >=Net 1e & price 1 - YES not 0 Accumulation Number Display Management Mode (Grand Total) 0 - NO 1 - YES 0 - Enable 1 - Disable Accumulation Subtraction Multiplication Tender Or Change 0 - Enable 1 - Disable 0 - Enable 1 - Disable 0 - Enable 1 - Disable 0 - Enable 1 - Disable Exit From Accumulation Mode After 15 Sec Exit From Accumula. Price Accumulation Mode When Weight Without Removing Changed Weight 0 - Inhibit 1 - Allow 0 - Inhibit 1 - Allow Charging Lamp On When Charging Keyboard & Display Type 0 - Fast 1 - Standard 0 - Disable 1 - Enable 0 - Allow 1 - Inhibit 0 - Disable 1 - Enable Price Accumulation When Weight Changed < +/- 10e 0 - Allow 1 - Inhibit *V1.01 0 - NO 1 - YES 000 - Standard Type 001 - CA Type 010 - U1 Type kg/lb Conversion (CA Type) *V1.01 Unit Price 1/2,1/4 lb Price Base (UK Type) Price Base AUTO Base (U1 Type) *V1.01 *V1.01 Clear (UK Type) 0 - Inhibit 1 - Allow 0 - Inhibit 1 - Allow Start Range 24 011 - Rounding For 1st Digit 100 - 5 Floor (0-4 -> 0, 5-9 -> 5) 0 - Rounding 101 - Truncate 1st Digit 1 - Truncation Manual Tare Clear 0 - Allow 1 - Inhibit 18 Bit 0 00 - +-10% FS 01 - +-5% FS *V1.06 10 - +-3% FS 11 - +-2% FS Page No. 13 011 - UK type 100 - Japan type *V1.02 100 ~ 111 - Not Used 0 - Inhibit 1 - Allow *V1.01 0 - Inhibit 1 - Allow Re-Zero Function *V1.06 0 - Enable 1 - Disable Not Used DS-685L/F Series Service Manual 2.8. Location Of Sealing Screw DS-685 provides two sealing positions for the purpose of sealing as shown in the diagram below. Page No. 14 DS-685L/F Series Service Manual 3. Error Message The following error message will appear when a incorrect operation is performed. Message Reasons Appropriate OF When displayed weight exceeded capacity+9d, or something is on the platter when power on. Remove the item on the platter. UF When displayed minus weight < -9d Re-Zero or On/Off again, if still no good please check the Load Cell or A/D board are problem or not. ERROR When calibration operation is not correct, or A/D starting check error. Repeat calibration operation, if still no good please check the load cell or A/D board are problem or not. ##### Scale is not steady when power on Place scale on firm, flat base. If still no good please try to recalibrate it. totAL FULL When current Total overflow. Clear current Total, or check the memory chip. G.t. FULL When Grand Total overflow. Clear Grand Total, or check the memory chip. (*Note) Note: “ # # # # # ” - All segment display. If you still cannot remove the trouble what you met according to above information, please contact to our Technical Service Dept. as cover page indicated. Page No. 15 DS-685L/F Series Service Manual 4. Hardware Detail 4.1. DS-685L 4.1.1. NRFI Electrical Connection Block Diagram 4.1.2. RFI Electrical Connection Block Diagram Page No. 16 DS-685L/F Series Service Manual 4.1.3. Microcomputer Pin Assignment The uPD75P308GF/uPD75308GF Microcomputer was chosen for the following reasons: z Low operating current z Having an on-chip programmable LCD controller/driver z Six interrupt sources and efficient interrupt processing z Three versatile timers z Less chip count z Pin compatibility of similar package with difference ROM sizes z Good support Pin I/O Assignment Device Remark P01/SCK O SCK 93C46P EEPROM P02/SO O S0 93C46P EEPROM P03/SI I SI 93C46P EEPROM P10/INT0 I SPANSW SWITCH Span Enable/Disable P11/INT1 I A/D INT uPC4062 A/D Conversion Interrupt P12/INT2 I BATTERY DETECT 1 uPC393C Detects battery Voltage Level 1 P13/TI0 I BATTERY DETECT 2 uPC393C Detects battery Voltage Level 2 P20/PTO0 O A/D CONTROL 74HC4066 A/D Conversion Control P00/INT4 P21 O A/D CONTROL 74HC4066 A/D Conversion Control P22/PCL O A/D CONTROL 74HC4066 A/D Conversion Control P23/BUZ O A/D CONTROL 74HC4066 A/D Conversion Control P30 O CS 93C46P EEPROM P31 O MAIN POWER ON/OFF Power Switch DC MAIN POWER P32 O BUZZ Buzzer Buzzer Sounder P40 O T8 Keyboard Key Scanning Line P41 O T1 Keyboard Key Scanning Line P42 O T2 Keyboard Key Scanning Line P43 O T3 Keyboard Key Scanning Line P50 O T4 Keyboard Key Scanning Line P51 O T5 Keyboard Key Scanning Line P52 O T6 Keyboard Key Scanning Line P33 P53 O T7 Keyboard Key Scanning Line P60/KR0 I K1 Keyboard Key Return Line P61/KR1 I K2 Keyboard Key Return Line P62/KR2 I K3 Keyboard Key Return Line P63/KR3 I K4 Keyboard Key Return Line P70/KR4 I K5 Keyboard Key Return Line S0 O SEGMENT 0 T195013 Segment Signal Output S1 O SEGMENT 1 T195013 Segment Signal Output S2 O SEGMENT 2 T195013 Segment Signal Output P71/KR5 P72/KR6 P73/KR7 Page No. 17 DS-685L/F Series Service Manual Pin I/O Assignment Device Remark S3 O SEGMENT 3 T195013 Segment Signal Output S4 O SEGMENT 4 T195013 Segment Signal Output S5 O SEGMENT 5 T195013 Segment Signal Output S6 O SEGMENT 6 T195013 Segment Signal Output S7 O SEGMENT 7 T195013 Segment Signal Output S8 O SEGMENT 8 T195013 Segment Signal Output S9 O SEGMENT 9 T195013 Segment Signal Output S10 O SEGMENT 10 T195013 Segment Signal Output S11 O SEGMENT 11 T195013 Segment Signal Output S12 O SEGMENT 12 T195013 Segment Signal Output S13 O SEGMENT 13 T195013 Segment Signal Output S14 O SEGMENT 14 T195013 Segment Signal Output S15 O SEGMENT 15 T195013 Segment Signal Output S16 O SEGMENT 16 T195013 Segment Signal Output S17 O SEGMENT 17 T195013 Segment Signal Output S18 O SEGMENT 18 T195013 Segment Signal Output S19 O SEGMENT 19 T195013 Segment Signal Output S20 O SEGMENT 20 T195013 Segment Signal Output S21 O SEGMENT 21 T195013 Segment Signal Output S22 O SEGMENT 22 T195013 Segment Signal Output S23 O SEGMENT 23 T195013 Segment Signal Output BP0/S24 O SEGMENT 24 T195013 Segment Signal Output BP1/S25 O SEGMENT 25 T195013 Segment Signal Output BP2/S26 O SEGMENT 26 T195013 Segment Signal Output BP3/S27 O SEGMENT 27 T195013 Segment Signal Output BP4/S28 O SEGMENT 28 T195013 Segment Signal Output BP5/S29 O SEGMENT 29 T195013 Segment Signal Output BP6/S30 O SEGMENT 30 T195013 Segment Signal Output BP7/S31 O SEGMENT 31 T195013 Segment Signal Output COM0 O COMMON 0 T195013 Common Signal Output COM1 O COMMON 1 T195013 Common Signal Output COM2 O COMMON 2 T195013 Common Signal Output COM3 O COMMON 3 T195013 Common Signal Output BIAS O BIAS - LCD Drive Power Supply VLC0 - VLC0 - LCD Drive Power Pin VLC1 - VLC1 - LCD Drive Power Pin VLC2 - VLC2 - LCD Drive Power Pin RESET I RESET - SYSTEM RESET X1 I - Oscillator 4.19 MHz Crystal X2 I - Oscillator 4.19 MHz Crystal XT1 I - - Connect To The VSS Pin - - - Grounding Potential Pin XT2 VSS VDD - - - Positive Power Pin (5V) NC/VPP - - - Connect To The VDD Pin Page No. 18 DS-685L/F Series Service Manual 4.2. DS-685F 4.2.1. NRFI Electrical Connection Block Diagram 4.2.2. RFI Electrical Connection Block Diagram Page No. 19 DS-685L/F Series Service Manual 4.2.3. Microcomputer Pin Assignment The uPD75P216A/uPD75212A Microcomputer was chosen for the following reasons: z Low operating current. z Having an on-chip programmable FIP controller/driver. z Eight interrupt sources and efficient interrupt processing. z Four versatile timers. z Less chip count. z Pin compatibility of similar package with difference ROM sizes. z Good support. Pin I/O Assignment Device Remark P00/INT4 I ON/OFF ON/OFF KEY Detects ON/OFF Key Status P01/SCK O SCK 93C46P EEPROM P02/SO O S0 93C46P EEPROM P03/SI I SI 93C46P EEPROM P10/INT0 I A/D INT uPC4062 A/D Conversion Interrupt P11/INT1 I VPAC L7815 Detects AC Power ON P12/INT2 I * VBATL2 LM324 Detects BATT Low 2 P13/TI0 I TI0 74HC4520 External Event Pulse Input P20 O CS 93C46P EEPROM P21 O FIP-PW FIP-PW Controls FIP Power P22 O RES 74HC4520 Controls 74HC4520 Reset P23/BUZ O BUZZ Buzzer Buzzer Sounder P30 I * VBATL1 LM324 Detects BATT Low 1 P31 I EN 74HC4520 Controls 74HC4520 EN P32 O * BAT-CHG BAT-CHG Controls BATT Charge P33 O * BAT-PW BAT-PW Controls BATT Power P40 O A/D PA 74HC4066 Controls A/D Conversion P41 O A/D PZ 74HC4066 Controls A/D Conversion P42 O A/D P- 74HC4066 Controls A/D Conversion P43 O A/D P+ 74HC4066 Controls A/D Conversion P50 I Q0 74HC4520 Input data P51 I Q1 74HC4520 Input data P52 I * VBATLH2 LM324 Detects BATT High Level2 P53 I * VBATLH1 LM324 Detects BATT High Level1 P60 I K1 Keyboard Key Return Line P61 I K2 Keyboard Key Return Line P62 I K3 Keyboard Key Return Line P63 I K4 Keyboard Key Return Line S0 O P17 19-LT-03GK Segment Signal Output S1 O P16 19-LT-03GK Segment Signal Output S2 O P15 19-LT-03GK Segment Signal Output S3 O P14 19-LT-03GK Segment Signal Output S4 O P13 19-LT-03GK Segment Signal Output S5 O P12 19-LT-03GK Segment Signal Output S6 O P11 19-LT-03GK Segment Signal Output S7 O P10 19-LT-03GK Segment Signal Output S8 O P9 19-LT-03GK Segment Signal Output S9 O P8 19-LT-03GK Segment Signal Output Page No. 20 DS-685L/F Series Service Manual Pin I/O Assignment Device Remark T15/S10 O T1 19-LT-03GK Digtal SignalOutput T14/S11 O T2 19-LT-03GK Digtal SignalOutput T13/S12 O T3 19-LT-03GK Digtal SignalOutput T12/S13 O T4 19-LT-03GK Digtal SignalOutput T11/S14 O T5 19-LT-03GK Digtal SignalOutput T10/S15 O T6 19-LT-03GK Digtal SignalOutput T9 O U1 19-LT-03GK Digtal SignalOutput T8 O U2 19-LT-03GK Digtal SignalOutput T7 O U3 19-LT-03GK Digtal SignalOutput T6 O U4 19-LT-03GK Digtal SignalOutput T5 O U5 19-LT-03GK Digtal SignalOutput T4 O W1 19-LT-03GK Digtal SignalOutput T3 O W2 19-LT-03GK Digtal SignalOutput T2 O W3 19-LT-03GK Digtal SignalOutput T1 O W4 19-LT-03GK Digtal SignalOutput T0 O W5 19-LT-03GK Digtal SignalOutput VPRE - VPRE - Power Supply VLOAD - VLOAD - Pull-down Resistor Pin PPO O SC 93C46P Output Pulse RESET I RESET - SYSTEM RESET X1 I - Oscillator 4.19 MHz Crystal X2 I - Oscillator 4.19 MHz Crystal XT1 I - - Connect to VDD Pin VSS - - - Gounding Potential Pin VDD - - - Positive Power Pin (5V) XT2 Note: '*' - For Rechargeable Battery type only. Page No. 21 DS-685L/F Series Service Manual 5. Circuitry Diagram We can not issue the electrical file for Circuitry Diagram, so please contact to us for paper copy if you need it. Thanks for your cooperation! Page No. 22