Do you have a question about the Citizen Quartz 7870 and is the answer not in the manual?
Describes the analog solar power watch that converts optical energy into electric energy.
Details specifications like module size, accuracy, oscillation, operating temperature, and secondary battery usage.
Explains quick start, time setting indication, insufficient recharging warning, and overcharging prevention.
Provides guidance on handling the watch, similar to a common analog watch, emphasizing light exposure.
Instructions for careful handling of the solar cell to prevent damage and maintain performance.
Guidelines for replacing secondary batteries in specific calibers, emphasizing designated types.
Precautions for handling capacitors, especially regarding over-charging and installation.
Procedures for removing and installing the setting stem for different case back structures.
Procedure to measure the voltage of the secondary battery or capacitor for diagnostic purposes.
Checks the output signal from the watch's electronic circuit for proper operation.
Examines connection parts for looseness, stains, or detachment to identify faults.
Measures the resistance of the coil unit to check its integrity.
Inspects the train wheel mechanism for proper function and alignment.
Examines the dial side mechanism for any operational issues or damage.
Checks the solar cell for breakage, stains, or electrode issues.
Details how to measure current consumption of the module and electronic circuit unit.
Covers measuring the watch's timekeeping accuracy and rate.
Confirms the watch's operational status under various environmental conditions.
Inspects the external appearance and overall functions of the watch.