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PARTS LIST / TECHNICAL GUIDE
Cal. No.
Item
・3 Hands (Hour, Minute, Second)
Driving system
Additional function
Normal position
Crown
1st click position
operation
2nd click position Time setting, hand position adjustment / resetting the circuit
Loss/Gain
Regulation system
Current consumption
Gate time for rate measurement
Coil resistance
Battery No.
Power supply
Battery voltage
Battery life
Jewels
ANALOGUE QUARTZ Cal. 6N23A
Step motor (Load compensated driving pulse system type)
・Electronic circuit reset switch
・Train wheel setting device
・Day and Date setting
・Battery life indicator
Free
Date setting (counter clockwise), Day settimg(clockwise)
Monthly rate : Less than 15 seconds (at normal temperature range)
Nil
・Movement: Less than 0.95 μA
・Circuit block: Less than 0.20 μA
Use 10-second gate
*Set the crown at the normal position
4004 317
2.15 - 2.35KΩ
SEIKO SB-AG SR621SW (Silver oxide battery)
1.55V
Approximately 3 years
0 jewels
6N23A
Movement Size
・Outside diameter: φ 18.50 mm
3H - 9H : 16.10
12H - 6H : 18.20
Casing diameter : φ 18.10 mm
3H - 9H :
12H - 6H : 17.80
・Height : 3.05 mm
1/13
－
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Summary of Contents for Seiko 6N23A
- Page 1 PARTS LIST / TECHNICAL GUIDE ANALOGUE QUARTZ Cal. 6N23A Cal. No. 6N23A Item Movement Size ・Outside diameter: φ 18.50 mm ・3 Hands (Hour, Minute, Second) 3H - 9H : 16.10 12H - 6H : 18.20 Casing diameter : φ 18.10 mm －...
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Page 2: Parts List
PARTS LIST Cal. 6N23A ① ㉝ → Disassembling procedures Figs. Lubricating : Types of oil Oil quantity AO-3 Normal Quantity ㉝ ① → Reassembling procedures Figs. AO-2 Sufficieet Quantity ① Hour, minute and second hands ② Dial * Oiling position ③... - Page 3 PARTS LIST Cal. 6N23A Lubricating : Types of oil Oil quantity AO-3 Normal Quantity AO-2 Sufficieet Quantity * Oiling position ⑬ Battery *Refer to the page 7 ⑭ 0351 332 Winding stem ⑮ 0016 121 Screw for Battery connection (+) ⑯...
- Page 4 PARTS LIST Cal. 6N23A Lubricating : Types of oil Oil quantity AO-3 Normal Quantity AO-2 Sufficieet Quantity * Oiling position ⑳ 4004 317 Circuit block with coil block ㉑ *Fourth wheel and pinion *Refer to the 6 page ㉓ 0701 170...
- Page 5 PARTS LIST Cal. 6N23A ●Tools and consumables required for disassembling/reassembling ・Movement Holder UNIVERSAL MOVEMENT HOLDER (S-682) ・Waich oils SEIKO watch oil AO-2 and AO-3 AO-2 AO-3 5/13...
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Page 6: Technical Guide
TECHNICAL GUIDE Cal. 6N23A Remarks： □Date dial Positing of Positing of Color of Part code Color of figure crown date frame Background 0148 092 Black White 0878 172 White Black □Day star with dial disk Positing of Positing of Color of... - Page 7 TECHNICAL GUIDE Cal. 6N23A REMARKS ON DISASSEMBLING AND REASSEMBLING THE MOVEMENT ① Hands How to install Place the movement directly on an universal movement holder to install the hands. Universal movement holder ⑬ Battery How to install battery Insert the battery aslant in the direction shown by the arrow.
- Page 8 TECHNICAL GUIDE Cal. 6N23A REMARKS ON DISASSEMBLING AND REASSEMBLING THE MOVEMENT ⑰ Insulator Setting position Notes: In order to insulate the battery connection (+) and the battery connection (-), the insulator should put at the three pins securely as below.
- Page 9 TECHNICAL GUIDE Cal. 6N23A REMARKS ON DISASSEMBLING AND REASSEMBLING THE MOVEMENT ㉙ Pin for setting wheel Notes: ・In disassembling and reassembling ，take care not to damage the pin, since it is made of plastic and easily damaged. ・In disassembling，pick the pin up vertically from the main plate with care.
- Page 10 TECHNICAL GUIDE Cal. 6N23A 〔STRUCTURE OF THE CIRCUIT BLOCK〕 Notes: Since the circuit block and coil block are an integrated structure, take care not to cut the coil wire. while disassembling and reassembling Crystal unit C-MOS-IC Input terminal(+) Coil Block Input terminal(-) ●...
- Page 11 When measuring the current consumption using the SEIKO digital multi-tester (S-860), use the range of 40 μ A of SUPPLY V (= 1.55 V) & GATE TIME (2 S). 2. Connect the AC component to the positive terminal for 2 seconds until a short circuit occurs to reset the integrated circuit.
- Page 12 TECHNICAL GUIDE Cal. 6N23A ●Water resistance test Check the water resistance according to the designated specification of the watch Marking on the case back Test method Applied pressure WATER RESISTANT(WATER RESIST) Air leak test 3 BAR WATER RESIST 5BAR 5 BAR...
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Page 13: Troubleshooting
TECHNICAL GUIDE Cal. 6N23A TROUBLESHOOTING Symptom Possible causes Solutions Movement The watch stops operating. The battery has been depleted. Measure the bat tery voltage. Replace the battery with a new one. The hour wheel and the pinion of Check the relevant parts, and...