This document is a service manual for the Aiwa XP-V714 and XP-V716C portable compact disc players, including detailed specifications, circuit diagrams, and maintenance instructions.
Function Description
The Aiwa XP-V714 and XP-V716C are portable compact disc players. The XP-V716C model also includes a car audio cassette adapter. Both models are designed to play compact discs, with the XP-V714 supporting AEZ, AHC, and AK region codes, and the XP-V716C supporting Y region codes. The devices feature a 3-beam laser tracking system and a semiconductor laser pickup. Digital-to-analog conversion is handled by a 4-times oversampling digital filter plus a 1-bit DAC.
Important Technical Specifications
XP-V714 (AEZ, AHC, AK):
- Tracking system: 3-beam laser
- Laser pickup: Semiconductor laser
- D/A conversion: 4-times oversampling digital filter + 1-bit DAC
- Frequency response: 20 - 20,000 Hz
- Output: PHONES / LINE OUT jack (stereo mini-jack), DIGITAL OUT jack (optical)
- Maximum output: 12 mW + 12 mW (EIAJ 16 ohms at 1 kHz) for headphones, 500 mV (47 kohms at 1 kHz) for line out.
- Power supply: DC 3 V using two LR6 (size AA) alkaline batteries, or DC 2.4 V using two supplied rechargeable batteries (Ni-Cd 1.2 V 700 mAh). Can also be powered by AC house current using the supplied AC adaptor.
- Dimensions: 127.9 (W) x 28.2 (H) x 130.6 (D) mm (5 1/8 x 1 1/8 x 5 1/4 in.)
- Weight: Approx. 204.6 g (7.2 oz.) excluding batteries
- AC adaptor AC-D603: Rated voltage AC 230 V, 50 Hz.
XP-V716C (Y):
- Tracking system: 3-beam laser
- Laser pickup: Semiconductor laser
- D/A conversion: 4-times oversampling digital filter + 1-bit DAC
- Frequency response: 20 - 20,000 Hz
- Output: PHONES / LINE OUT jack (stereo mini-jack)
- Maximum output: 12 mW + 12 mW (EIAJ 16 ohms at 1 kHz) for headphones, 500 mV (47 kohms at 1 kHz) for line out.
- Power supply: DC 3 V using two LR6 (size AA) alkaline batteries, or DC 2.4 V using two supplied rechargeable batteries (Ni-Cd 1.2 V 700 mAh). Can also be powered by AC house current using the supplied AC adaptor.
- Dimensions: 127.9 (W) x 28.2 (H) x 130.6 (D) mm (5 1/8 x 1 1/8 x 5 1/4 in.)
- Weight: Approx. 204.6 g (7.2 oz.) excluding batteries
- AC adaptor AC-D603: Rated voltage AC 220 V, 50 Hz.
- Car audio cassette adaptor CAP-6:
- Frequency range: 50 - 20,000 Hz
- Cord Length: 1.5 m (4 ft 11 in.)
- Dimensions: 102.4 (W) x 12.1 (H) x 63.8 (D) mm (4 1/8 x 1/2 x 2 5/8 in.)
- Weight: Approx. 41 g (1.4 oz.)
- Car battery adaptor DC-602:
- Input voltage: DC 12 V / 24 V
- Output voltage: DC 6 V 300 mA
- Cord length: 1.5 m (4 ft 11 in.)
- Weight: Approx. 53 g (1.9 oz.)
Usage Features
The device features a clear LCD display that provides information such as program (PRGM), random (RNDM), resume (RESUME) playback modes, battery status (E-A-S-S for Full, Medium, Empty, and Low-Batt indications), track number, and time. Control buttons include PLAY, STOP, F-SKIP, B-SKIP, MODE, and ENT. The XP-V716C model includes a car audio cassette adapter, allowing it to be used with car audio systems. The device also has a HOLD function to prevent accidental button presses.
Maintenance Features
The service manual provides comprehensive instructions for maintenance and repair.
- Laser Safety: Emphasizes protection of eyes from laser beam during servicing, with warnings about invisible laser radiation and the need to observe from a distance of more than 30cm from the objective lens. The device is classified as a CLASS 1 LASER PRODUCT.
- Optical Block Replacement: Detailed precautions for replacing the SF-P200 optical block, including grounding the body and workbench to prevent electrostatic discharge that could damage the laser diode. Instructions specify removing solder after connection.
- Parts List: Includes a detailed electrical main parts list (ICs, transistors, diodes, capacitors, connectors, coils, switches) and a mechanical exploded parts list with corresponding part numbers and descriptions. Chip resistor part coding is explained.
- Wiring and Schematic Diagrams: Provides wiring diagrams for the main/jack board and lid, as well as schematic diagrams for the main/jack board and lid, aiding in troubleshooting and component identification.
- Test Mode: Describes a "Test Mode" for adjustment-free servo circuit and disc distinction. This mode allows confirmation of RF level, tracking balance, and individual servo adjustments (Focus Bias, Tracking Balance, Tracking Gain, Focus Error Offset). It also enables confirmation of sled movement and disc distinction (CD-DA, CD-R, CD-RW) based on judgment values displayed on the LCD.
- Waveforms: Illustrates expected waveforms at specific IC pins (RF, TEOUT, FEOUT, OSC1) to assist in diagnosing circuit performance.
- IC Description: Provides a pin-by-pin description of the main ICs (MN101C439AA/AD, MN662782RPT1, BH6554FV, AN8838NSB, TA2120FN), detailing their functions and I/O types.
- Battery Indication: Explains the hexadecimal values corresponding to different battery status indications (Green, Orange, Red, Lo-Batt).
- A/D Tables: Provides tables for K-FUNC, SWEASS, SWR/H, K-P/S, and K-RMC inputs, showing the hexadecimal values and their corresponding functions/states.
- Accessories/Package List: Lists all included accessories such as AC adaptors, headphones, RC units, and car adaptors.
The manual is designed for service personnel, providing all necessary information for accurate diagnosis, repair, and maintenance of the Aiwa XP-V714 and XP-V716C CD players.
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