This document provides a comprehensive service manual for the Panasonic Portable CD Player models SL-CT700GD and SL-CT700GK. The manual covers various aspects of the device, including its specifications, accessories, precautions, operation checks, component replacement, self-diagnostic functions, troubleshooting, and schematic diagrams.
Function Description:
The Panasonic Portable CD Player is designed for playing compact discs (CDs) and features digital audio output. It supports various CD formats, including CD-DA, CD-R, and CD-RW. The device is portable and can be powered by an AC adaptor or rechargeable batteries. It offers connections for an audio system, external battery case, and car audio, enhancing its versatility for different usage scenarios. The player includes standard controls for play, pause, stop, skip, search, and volume adjustment, accessible both on the main unit and via a remote control. It also incorporates an anti-shock memory to prevent sound interruptions during movement.
Important Technical Specifications:
- CD-DA Section:
- No. of channels: 2 channels (left and right, stereo)
- Frequency response: 20 Hz to 20,000 Hz (+0.5 dB to -1.5 dB)
- Output voltage: 0.6 V (50 kΩ)
- S/N: 96 dB (JIS A)
- Wow and flutter: Below measurable limit
- DA converter: 1 bit, MASH
- Headphone output level: 9 mW + 9 mW/16 Ω (adjustable)
- Pickup:
- Light source: Semiconductor laser
- Wavelength: 780 nm
- MP3 Section:
- Supported bit rates: 32 kbps to 320 kbps (128 kbps recommended)
- Supported sampling frequency: 48 kHz/44.1 kHz/32 kHz
- Maximum number of items (sum of albums and tracks): 999
- Maximum album number: 100
- General:
- Operational temperature range: 0 - 40 degree
- Rechargeable temperature range: 0 - 40 degree
- Power supply:
- Rechargeable batteries (included): DC 4.8 V
- AC adaptor input:
- SL-CT700GD: AC 220 V, 50 Hz
- SL-CT700GK: AC 220 V, 50 Hz
- Power consumption:
- Using AC adaptor (MP3/CD-DA): 3.3 W/3.3 W
- Recharging: 5.2 W
- Play time (approximate operating time in hours using MP3 at the recommended bit rate of 128 kbps, with anti-shock off, and CD canceled, at 25 degrees on a flat, stable surface):
- Rechargeable batteries (LRO3):
- 1 rechargeable battery: Approx. 67-7 h
- 2 rechargeable batteries: Approx. 17/11 h
- 2 supplied rechargeable batteries: Approx. 40/6 h
- Note: Play time may be less depending on operating conditions.
- Recharging time: Approx. 2 to 3 h
- Dimensions (W x H x D): 133.8 x 17.5 x 133.8 mm
- Mass: 204 g (with batteries) / 170 g (without batteries)
Usage Features:
- Portability: The compact design and battery power option make it highly portable for on-the-go listening.
- Versatile Connectivity:
- Optical Digital / Line Out Jack: Allows connection to an audio system for high-quality digital audio output. Requires an AC adaptor for use.
- DC IN Jack: For connecting the AC adaptor to power the unit and recharge batteries.
- Headphone Jack: Standard 3.5mm jack for connecting headphones or earphones.
- Battery Case Terminal: For connecting an external battery case to extend play time.
- Car Audio Integration: Compatible with optional car power adaptors (SH-CDC9) and car stereo cassette adaptors (SH-CDM10A) for in-car use and battery recharging.
- Remote Control: A wired remote control provides convenient access to play, stop, skip, search, volume, display panel, tone selection, play mode, and program/recall/display functions.
- MP3 Playback: Supports MP3 files, offering extended playback duration compared to standard audio CDs.
- Rechargeable Batteries: Comes with rechargeable batteries (RP-BP61GY-S) for convenient power.
Maintenance Features:
- Precaution for Laser Diode: The manual emphasizes caution regarding the invisible laser radiation emitted from the pick-up lens. Users are warned not to disassemble the optical pick-up unit, adjust variable resistors, or look at the pick-up lens with optical instruments.
- Handling Precautions for Traverse Deck: Detailed instructions are provided for handling the traverse deck and optical pick-up to prevent electrostatic breakdown. This includes using an anti-static wrist strap and ensuring the work table is properly grounded with a conductive mat.
- Operation Checks and Component Replacement: The manual outlines procedures for checking the operation of major printed circuit boards and replacing main components. It specifies steps for opening the CD lid unit, removing cabinet parts, and accessing internal components like the main P.C.B., CD lid unit, shaft, axle hole board, traverse motor, and optical pick-up.
- Self-Diagnostic Function: The device includes a self-diagnostic function that displays error codes (e.g., "F15") on the remote control display to indicate specific issues, such as problems with the traverse deck or switch failures.
- Troubleshooting: A comprehensive section provides a flowchart for checking operation problems on the traverse deck, including checks for focus search, laser turn-on, tracking, and RF signal output. It also details procedures for checking skip search and manual search.
- Automatic Adjustment Results Display Function / Self-Check Function: The unit can display automatic adjustment results on the remote control display, which is useful for identifying incorrect adjustment circuits.
- Schematic Diagrams and Parts List: Detailed schematic diagrams for the main circuit and block diagrams are provided, along with a comprehensive replacement parts list. Components critical for safety are identified with a triangle mark.
- Static Electricity Precautions: Explicit warnings are given about the sensitivity of ICs and LSIs to static electricity, advising technicians to take care during repair, cover parts boxes with aluminum foil, ground soldering irons, use conductive mats, and avoid touching IC/LSI legs directly.
- Rechargeable Battery Replacement: Specific instructions and warnings are provided for handling and replacing rechargeable batteries, including precautions against shorting them with metal.
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