Part 1: Watch Block
1. Circuit Diagram
The circuit diagram illustrates the internal connections of the watch module. Key components include the LSI (Large Scale Integration) chip, Quartz oscillator for timekeeping, Battery as the power source, LCD (Liquid Crystal Display) for showing time and other information, and two Chip capacitors (C1, C2) and a Transistor (Tr) for circuit regulation and signal processing.
2. Checking Terminals and Components
This section details the physical layout and identification of components on the Printed Circuit Board (P.C.B.) with LSI. The top view shows the P.C.B. with LSI, Quartz oscillator (XT), and various terminals (VDD, Vss1, BD, S1, S3, S4). The bottom view shows the P.C.B. with connections for Vcc, Vss1, VDD, Vc, and components like Chip capacitor (C1), Transistor (Tr), and Coil (L).
LCD Drive Terminals: A diagram shows the various terminals connecting to the LCD, labeled with alphanumeric codes (e.g., 1Z, 2Z, 3Z, 5Z, 6Z, 7Z, 8Z, 9Z, 10Z, 11Z, 12Z, 13Z, 14Z, 15Z, 16Z, 17Z, 18Z) and corresponding pin numbers.
Specifications
| Item | Detail | Item | Detail |
|---|---|---|---|
| Battery | No. 365/SR1116W (28mAH, 1.55Vdc) | Accuracy | ±30 sec./month |
| Battery life | Approx. 2 years | Accuracy setting system | Pad selection (G1~G3) |
| Current consumption | 1.55µA maximum | Accuracy checking | See page 5 |
| Alarm system | Piezo plate on back cover | Accuracy setting | +0.9~-0.7 sec./day |
4. Exploded View
An exploded view illustrates the assembly of the watch module. It shows components such as the LCD, P.C.B. with LSI, Quartz oscillator, Chip capacitors, Transistor, Coil, Battery contact, Battery supporter, Interconnector, Coil spring, Insulation sheet, Main (Switch) plate, Housing parts, and Cushion. Each part is assigned a number and a code number for identification.
5. Parts List
The parts list categorizes spare parts into A Rank (Very Important) and B or C Rank (Important, Others). It provides detailed information for each part, including Item number, Code No., Part Name, Spec. No., Applicable Model (TM-100, QW-661C02), Quantity (Q'ty) per unit, and minimum order/supply quantity (*).
| Item | Code No. | Part Name | Spec. No. | Applicable Model | Q'ty | Unit Price N.R. Yen (¥) (FOB: JAPAN) |
|---|---|---|---|---|---|---|
| A Rank | ||||||
| 1 | 7000 4101 | LCD | C506-01 | QW-661C02 | 1 | |
| 2 | 7100 2128 | P.C.B. with LSI | MSM6087C-459 | " | 1 | |
| 3 | 7101 0074 | Transistor | 2SC1622A | " | 1 | |
| 4 | 7103 2167 | Chip capacitor | CM-21YV104P15V | " | 2 | (10) |
| 5 | 7110 1070 | Quartz oscillator | KF-26GT | " | 1 | (5) |
| 6 | 7020 0236 | Coil | OL3.3 x 1.6DR-01 | " | 1 | (5) |
| B or C Rank | ||||||
| 7 | 7225 1024 | Battery contact (-) 156 | Q32496-1 | QW-661C02 | 1 | (20) |
| 8 | 7212 3174 | Battery supporter 187 | Q32612A-1 | " | 1 | (10) |
| 9 | 7010 1343 | Interconnector 506B | Q410135-1 | " | 1 | (20) |
| 10 | 7201 8877 | Coil spring 506B | Q410700A-1 | " | 1 | (50) |
| 11 | 7211 8103 | Insulation sheet 231 | Q43835-1 | " | 1 | (20) |
| 12 | 7212 5821 | Main (Switch) plate 661 | Q23065-1 | " | 1 | (10) |
| 13 | 7222 0404 | Housing 506-1 | Q22124-1 | " | 1 | (20) |
| 14 | 7222 0421 | Housing 506-2 | Q22125-1 | " | 1 | (20) |
| 15 | 7211 9649 | Cushion 506B | Q49500 | " | 1 | (20) |
| 16 | Battery | No. 365 (SR1116W) | QW-661C02 | 1 | ||
Operation Chart: Module QW-661
This section details the operational procedures for various modes of the watch and transmitter.
Reading the Display
[Regular timekeeping mode]: Displays time (Hour, Minute, Second) and PM indicator. Buttons: [Press B] to cycle modes, [Press C] to set time/calendar. [Release B] to return.
[Countdown alarm]: Displays countdown period indicator. Buttons: [Press C] to set countdown period (1 to 30 minutes). [Press B] to start/stop countdown. When countdown reaches zero, a beeper sounds for 10 seconds. Any button stops the beeper.
[Calendar]: Displays Month, Date, Day. Buttons: [Press C] to set.
[Daily alarm mode]: Displays Time-signal-ON mark and Alarm-ON mark. Buttons: [Press C] to set hour, [Press B] to set minute. [Press C] to complete. Auto-retrieve to regular timekeeping mode if no button is pressed for 1-2 minutes.
[Stopwatch mode]: Displays Hour, Minute, Second, 1/10 second. Buttons: [Press A] to start/stop. [Press A] again to reset. Total elapsed time display is limited to 59 minutes 59.9 seconds.
[Time/calendar setting mode]: Used for setting time and date. Buttons: [Press C] to set.
Countdown Alarm Operation
Countdown can be set from 1 minute to 30 minutes by repeatedly pressing [Button C]. When countdown reaches zero, a beeper sounds for 10 seconds. Press any button to stop the beeper.
Daily Alarm Operation
A beeper sounds for 20 seconds at the preset time daily. If the time signal is set, a signal sounds every hour on the hour. (Sound demonstration: Press and hold [Button A] in alarm mode to sound beeper.)
[Setting Daily Alarm]
- Press [Button C] in daily alarm mode to set the hour. Pressing [Button B] increments the digit. Holding [Button B] allows high-speed change.
- Press [Button C] to set the minute digits. Pressing [Button B] increments the digit. Holding [Button B] allows high-speed change.
- Press [Button C] to complete.
[On or off setting of daily alarm and time signal]:
- Press [Button A] to cycle through options: Daily alarm and time signal sound, Daily alarm and time signal do not sound, Daily alarm only sounds, Time signal only sounds.
Using Transmitter
1. Switch on FM radio and set to a frequency (88 MHz to 108 MHz) where no broadcast is received. Set stereo/mono switch to "mono" if available. Noise should be heard.
2. Switch on transmitter and pull out antenna. [Switch off transmitter when not in use.]
3. Slowly turn the tuning knob to the position where the noise on the radio stops. High volume settings may cause howling.
4. Speak into the microphone on the transmitter and adjust radio tuning.
Transmitter Precautions
- This product is not intended to be used to invade the privacy of others.
- Never attempt to increase the power of the transmitter by altering internal circuitry or extending the antenna, as this may violate local laws.
- Avoid frequencies used by commercial radio stations.
- Transmitter efficiency is reduced in low temperatures.
- Maximum communication distance is approximately 60 meters under optimum conditions; actual distance depends on surroundings and radio conditions.
- Orient the antenna for best position.
- Stable reception may be difficult with radios using headphone/earphone cords as antennas; use a high-sensitivity FM radio for best results.
Transmitter Applications
- Sending a voice to a remote radio unit.
- Recording of conversation on a radio cassette recorder.
- Using a radio as a wireless PA device.
- Intercommunication between motor vehicles over FM radio.
Transmitter Battery Maintenance
Transmitter signal weakens when battery power decreases. Replace the battery periodically (every 2 years). Do not leave a dead battery in the unit to avoid malfunction. Remove the battery if the transmitter is not used for extended periods.
- Using a coin, remove the rear battery cover. [Do not throw away the ring.]
- Replace the battery, ensuring the plus (+) side is facing up.
- Place the ring on top of the battery and screw on the cover. The ring protects the unit from dust and humidity.
6. AC (All Clear)
Press the AC (All Clear) contact when inserting a new battery, or memories and counters may give erratic displays. Touch the AC contact and the positive battery side (+) with metal tweezers for about 2 seconds.
7. Accuracy Checking
Accuracy checking requires specific operations because the internal display drive wavelength is 42.6 Hz. To check accuracy by 32 Hz, select the "ACCURACY CHECKING MODE".
A) CHANGE TO THE "ACCURACY CHECKING MODE"
Push all buttons ([Button A], [Button B], and [Button C]) simultaneously for about 3 seconds. All segments will display, and the LCD drive signals will change from 42.6 Hz to 32 Hz. Check accuracy with a quartz timer's LCD sensor.
B) CANCELLATION OF THE "ACCURACY CHECKING MODE"
Push any button. The display will return to the regular timekeeping mode. The mode will automatically return to regular mode in 1-2 hours without operation.
Part 2: Transmitter Block
1. Specifications
- A) TYPE: 3-transistor FM transmitter
- B) TRANSMISSION FREQUENCY: 88 MHz ~ 108 MHz
- C) MODULATION: Frequency modulation (FM)
- D) FIELD STRENGTH: Less than 15µV/m at a distance of 100 meters
- E) ANTENNA: 105mm overall length (77mm extended portion)
- F) TRANSMISSION RANGE: Approx. 60m in flat area, line-of-sight (Actual distance differs according to environmental and radio conditions.)
- G) BATTERY TYPE: No. 389/SR1130W (1.55 V, 85mAH)
- H) BATTERY LIFE: Approx. 5 hours (continuous operation)
- I) CURRENT CONSUMPTION: 6mA ~ 8mA
2. Repair
Precise adjustment and fine tuning by a special instrument are required when repairing the P.C.B. assembly in the transmitter block. If a trouble occurs, replace the entire P.C.B. assembly with a new one.
3. Exploded View
An exploded view shows the assembly of the transmitter block. Components include the Battery cover, Back seal rubber, Back cover assembly, Terminal plate, Screws, Packing ring, WATCH BLOCK (refer to Page 3), Crown button assembly, Push button assemblies (for Set and Function), Case center sub assembly with glass, Front button assembly, Contact switch, Front button guide, O-ring, Water protect sheet, Antenna, and Antenna guide. Components marked with "*" are detailed in the Parts List P/L-401.
4. Parts List
This parts list details components for the TRANSMITTER BLOCK OF MODULE QW-661C02 (TM-100). Parts are categorized into A Rank and B or C Rank, with columns for Item, Code No., Part Name, Spec. No., Applicable Model, Quantity (Q'ty), and Unit Price.
| Item | Code No. | Part Name | Spec. No. | Applicable Model | Q'ty | Unit Price N.R. Yen (¥) (FOB: JAPAN) |
|---|---|---|---|---|---|---|
| A Rank | ||||||
| 1 | 7240 2134 | P.C.B. ass'y | Q23164*2 | QW-661C02 | 1 | |
| 2 | 7105 0033 | Microphone | WM-62A | " | 1 | |
| B or C Rank | ||||||
| 3 | 7225 2141 | Battery contact (+) 661 | Q311052-1 | QW-661C02 | 1 | (20) |
| 4 | 7225 2133 | Battery contact (-) 661 | Q311048-1 | " | 1 | (20) |
| 5 | 7201 9106 | Coil spring 661 | Q412827-1 | " | 1 | (50) |
| 6 | 7207 8470 | Screw 465B | Q48694B-1 | " | 3 | (50) |
| 7 | 7212 5829 | Terminal plate 661 | Q311051-1 | " | 1 | (20) |
| 8 | 7212 5837 | Terminal plate 661-1 | Q412892-1 | " | 1 | (10) |
| 9 | 7212 6061 | Terminal plate 661-2 | Q311482-1 | " | 1 | (20) |
| 10 | 7212 6093 | Terminal plate 661-4 | Q311694-1 | " | 1 | (10) |
| 11 | 6324 0443 | Insulation seal for battery | A43337-1 | " | 1 | (10) |
| 12 | 7218 0470 | Insulation sheet 661 | Q412889-1 | " | 1 | (20) |
| 13 | 7218 0926 | Insulation sheet 661-1 | Q413218-1 | " | 1 | (20) |
| 14 | 7218 0982 | Insulation sheet 661-2 | Q413396-1 | " | 1 | (20) |
| 15 | 7218 1000 | Insulation sheet 661-3 | Q413397-1 | " | 1 | (20) |
| 16 | Battery | No. 389 (SR1130W) | QW-661C02 | 1 | ||
5. Transmitter Characteristic
A. Field strength and transmission range
What is meant by a field strength of 15 µV/m? It is a value indicating the strength of a radio wave, expressed by the voltage induced in a 1-meter-long conductor placed in space. 15 µV/m means a 15 microvolt (15/1,000,000 of one volt) induced voltage.
Transmission range by a field strength of 15 µV/m? A highly sensitive radio set can receive signals with several dB input for practical use. However, high ambient noise levels make reception difficult unless the desired signal is considerably higher than the noise. The signal-to-noise (S/N) ratio, generally needing to be over 20 dB (signal strength ten times noise strength), is used to express this relation. 15 µV/m is equivalent to 23.5 dB. This field strength is adequate for suburbs with lower noise levels. In urban or industrial areas with higher noise, the S/N ratio decreases, necessitating proximity to the radio source.
- Transmission range varies depending on radio set performance (sensitivity, etc.).
- Transmission range varies depending on the noise level around the receiving station (urban areas typically have ~20 dB noise level).
- Practical transmission range is shorter with high-rise buildings or hills on the propagation path.
B. Transmission range depending on surroundings
The TM-100's feeble field strength and short antenna affect transmission range based on surroundings. Conductive materials near the TM-100 can weaken or strengthen the radio field, depending on the radio wavelength. Radio field strength weakens in cases such as:
- Communication between a room enclosed by metallic material (e.g., a ferro-concrete building) and the outside.
- When a window is open but is small relative to the radio wavelength.
- Communication over obstacles like fences.
Radio field strength becomes strong in the following cases:
- Field strength is induced around a conductive object near the TM-100.
- Areas close to water.
- The TM-100 is operated at a high altitude.
C. Transmission techniques for the TM-100
The TM-100 produces a weak radio wave with a short antenna that retracts into the watch case, making it much shorter than a conventional rod antenna. Variations in radio field strength occur based on the direction the user faces and the position of the wrist. For example, turning the back towards the receiving station can improve reception due to backward directionality. The height of the person holding the TM-100 also causes variations.
Distance travelled by radio waves varies with voice input level. Low voice input and long communication distance reduce speech articulation. Positioning the microphone too close to the mouth distorts sound; maintain a distance of 5 to 8 cm and speak at the proper input level.
Note: Never attempt to increase transmitter power by altering internal circuitry or extending the antenna, as this may violate local laws governing radio transmitters.
D. Receiving techniques by radio sets
To increase transmission range without violating laws, radio set performance should be improved. This can include connecting a high-performance antenna or attaching an FM receiving amplifier. Adjusting the direction of the receiving antenna can optimize reception.
