Casio QW-2424 Manuals

SERVICE MANUAL & PARTS LIST (WITHOUT PRICE) QW-2424 MODULE NO. R REF. NO. S/M-756 NOV. 2001 MSG-130D — 1 — 1. SPECIFICATIONS: QW-2424 Battery CR1620 Battery life Approx. 3 years Current consumption 1.19 µA maximum Alarm system Piezo plate on Back cover Accuracy ±15 sec./month Accuracy setting system Trimmer capacitor Accuracy checking See page 8 Functions • Shock resistant • Multi Illuminator (Multi-color LED backlight) Afterglow • 1/100-second stopwatch Measuring capacity: 23:59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times Other: Auto-start • Daily alarm • Hourly time signal • Auto-calendar (to year 2039) • 12/24-hour formats • Regular timekeeping: Hr, min, sec, am/pm, month, date, day, daylight saving on/off Item Detail CONTENTS Page 1. SPECIFICATIONS: QW-2424..................................................................... 1 2. OPERATION CHART: QW-2424 ................................................................ 2 3. DRAWINGS: QW-2424 3-1. LCD DIAGRAM ................................................................................... 3 3-2. CIRCUIT DIAGRAM ............................................................................ 4 3-3. CHECKING TERMINALS AND COMPONENT .................................. 5 4. EXPLODED VIEW: QW-2424 ..................................................................... 6 5. PARTS LIST: QW-2424 .............................................................................. 7 6. PRECAUTIONS FOR REPAIR: QW-2424 6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ............................ 8 6-2. ACCURACY CHECKING .................................................................... 8 — 2 — 2. OPERATION CHART: QW-2424 General Guide • Press B to change from mode to mode. Timekeeping Mode Alarm Mode Stopwatch Mode Press . Timekeeping Mode Day of week Month - Day PM indicator Seconds Hour : Minutes DST on indicator • In the Timekeeping Mode, press C to switch between the 12-hour and 24- hour format. • When the 12-hour format is selected, “p.m.” times are indicated on the display by P, while “a.m.” times are indicated by A. No indicators are used with the 24-hour format. To set the time and date 1. Hold down A until the second’s digits start to flash. 2. Press B to move the selection around the display in the following sequence. DST on/off Seconds Day Hour Year Month Minutes 3. While the second’s digits are selected (flashing), press C to reset them to 00. If you press C while the second’s count is in the range of 30 to 59, they are reset to 00 and 1 is added to the minutes. If the second’s count is in the range of 00 to 29, the minute’s count is unchanged. 4. While the DST* setting is selected (DST on indicator is flashing), press C to toggle it on (on) and off (OF). 5. While any other setting (besides seconds) is selected (flashing), press C to change it. Holding down C changes the digits at high speed. • The date can be set with the range of January 1, 2000 to December 31, 2039. 6. After you set the time and date, press A to return to the Timekeeping Mode. • If you do not operate any button for a few minutes while a selection is flashing, the flashing stops and the watch goes back to the Timekeeping Mode automatically. • The day of the week is automatically set in accordance with the date. • The watch’s built-in full automatic calendar automatically makes allowances for different month lengths and leap years. Once you set the date, there should be no reason to change it except after the replacement of the watch’s battery. Da * ylight Saving Time (DST), which is also sometimes called “summer time” advances the time for one hour, as is the custom in some areas during the summer. Remember that not all countries or even local areas use Daylight Saving Time. About the Multi Illuminator Backlight • In any mode, press L to illuminate the display for about 3 seconds. • The backlight of this watch employs a “Multi Illuminator” light, which illuminates the display using one of three colors. • The color of the backlight changes according to function. • Frequent use of the backlight shortens the battery life. • The illumination provided by the backlight may be hard to see when viewed under direct sunlight. • The backlight automatically turns off whenever an alarm sounds. Alarm Mode When the Daily Alarm is turned on, an alarm sounds for 20 seconds at the preset time each day. When the Hourly Time Signal is turned on, the watch beeps every hour on the hour. • If you do not operate any button for a few minutes while in the Alarm Mode, the watch goes back to the Timekeeping Mode automatically. To set the alarm time 1.Hold down A until the hour digits start to flash on the display. The hour digits flash because they are selected. At this time the Alarm is automatically turned on. 2.Press B to change the selection in the following sequence. Hour Minutes Mode indicator Hour : Minutes Alarm on indicator Hourly time signal on indicator 3. Press C to increase the number. Holding down C changes the digits at high speed. • The format (12-hour and 24-hour) of the alarm time matches the format you select for normal timekeeping. • When setting the alarm time using the 12-hour format, take care to set the time correctly as morning or afternoon. 4. After you set the alarm time, press A to return to the Alarm Mode. • If you do not operate any button for a few minutes while a selection is flashing, the flashing stops and the watch goes back to the Alarm Mode automatically. To stop the alarm • Press any button to stop the alarm after it starts to sound. To turn the Daily Alarm and Hourly Time Signal on and off Press C while in the Alarm Mode to change the status of the Daily Alarm and Hourly Time Signal in the following sequence. Hourly Time Signal only Daily Alarm only Both OFF Both ON To test the alarm Hold down C while in the Alarm Mode to sound the alarm. Stopwatch Mode The Stopwatch Mode lets you measure elapsed time, split times, and two finishes. The range of the stopwatch is 23 hours 59 minutes, 59.99 seconds. • If you do not operate any button for a few minutes while the all-zero screen is on the display in the Stopwatch Mode, the watch goes back to the Timekeeping Mode automatically. Mode indicator 1/100 second Hours Minutes Seconds (a) Elapsed time measurement Start Stop Re-start Stop Clear Start Split Split release Stop Clear Start Split Stop Split release Clear (b) Split time measurement (c) Split time and 1st-2nd place times First runner finishes. Second runner finishes. Record time of first runner. Record time of second runner. About the Auto-Start function With the Auto-Start function, the watch performs a 5-second countdown. When the countdown reaches zero, stopwatch operation starts automatically. During the final three seconds of the countdown, a beeper sounds with each second. To turn the Auto-Start function on and off While the display is showing all zeros in the Stopwatch Mode, press A to toggle it on and off. AUTO START indicator Press . Auto start ON Auto start OFF • To stop the Auto-Start countdown and return to the all-zero display, press A. • Pressing C while the Auto-Start countdown is in progress immediately starts the stopwatch. — 3 — 3. DRAWINGS: QW-2424 3-1. LCD DIAGRAM SEG. COM. L 1 L 2 L 3 L 4 L 5 L 6 L 7 L 8 L 9 L10 L11 L12 L13 LC1 c6 d6 e6 X0Y6 X1Y6 X2Y6 X3Y6 X4Y6 X5Y6 X6Y6 X6Y0 X5Y0 LC2 b6 g6 f6 a6 X0Y2 X1Y2 X2Y2 X3Y2 X4Y2 X5Y2 X6Y2 X6Y1 X5Y1 LC3 c8 e7 d7 c7 X0Y3 X1Y3 X2Y3 X3Y3 X4Y3 X5Y3 X6Y3 AUTO-ST c0 LC4 g8 hyp g7 b7 X0Y4 X1Y4 X2Y4 X3Y4 X4Y4 X5Y4 X6Y4 SPL b0 LC5 a8 b8 f7 a7 X0Y5 X1Y5 X2Y5 X3Y5 X4Y5 X5Y5 X6Y5 a0 SEG. COM. L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24 L25 L26 L27 LC1 X4Y0 X3Y0 X2Y0 X1Y0 X0Y0 j2 d2 j3 d3 j4 d4 j5 PM (DST2) LC2 X4Y1 X3Y1 X2Y1 X1Y1 X0Y1 c2 e2 c3 e3 c4 e4 c5 AM a9 LC3 d0 e0 c1 SIG i2 g2 i3 g3 i4 g4 i5 adeg5 d8 LC4 g0 b1 g1 d1 ALM b2 f2 b3 f3 b4 f4 b5 col0 e8 LC5 f0 a1 f1 e1 DST1 h2 a2 h3 a3 h4 a4 h5 col1 f8 a1 b1 c1 d1 e1 f1 g1 a8 b8 c8 e8 d8 g8 f8 a d e g 5 b5 c5 h5 i5 j5 h2 a2 f2 g2 e2 d2 j2 c2 i2 b2 h3 a3 f3 g3 e3 d3 j3 c3 i3 b3 h4 a4 f4 g4 e4 d4 j4 c4 i4 b4 AM PM col0 col1 DST1 ALM SIG AUTO-ST SPL a0 b0 c0 d0 e0 g0 f0 a6 b6 c6 d6 e6 f6 g6 a7 b7 c7 d7 e7 f7 g7 h y p a9 X6 X0 X1X2 X3X4X5 Y6 Y0 Y1 Y2 Y3 Y4 Y5 L12 L27 L26 L25 L24 L23 L22 L21 L20 L19 L18 L17 L16 L15 L14 L13 L 1 L 2 L 3 L 4 L 5 L 6 L 7 L 8 L 9 L10 L11 LC1 LC2 LC3 LC4 LC5