Clarion McIntosh PF-2551I-A

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PF-2551I-A

Published by Service Dept.

Printed in Japan

Clarion Co., Ltd.

50 Kamitoda, Toda-shi, Saitama 335-8511 Japan

Service Dept.: 5-66 Azuma , Kitamoto-shi, Saitama 364-0007 Japan

Tel: +81-48-541-2335 / 2432 FAX: +81-48-541-2703

298-6090-00

Jul.2003

Service Manual

Model

SUBARU Automobile Genuine

AM/FM 6-Disc CD Changer Deck

PF-2551I-A

(Genuine No.86201AG240)

SPECIFICATIONS

Radio section

Tuning system: PLL Frequency synthesizer system

Receive range: AM 531 kHz to 1,629 kHz

FM 87.5 MHz to 108 MHz

Intermediate frequency:

AM 450 kHz

FM 10.7 MHz

Quieting sensitivity: AM Less than 41 dBu

(at 20 dB S/N)

FM Less than 15 dBu

(at 30 dB S/N)

Separation: FM More than 20 dB

Auto tuning stop sensitivity:

AM 37 +6/-6 dBu

FM 26 +6/-6 dBu

CD section

Disc: Compact disc (8 cm / 12 cm)

Separation: More than 65 dB (at 20 kHz LPF)

S/N ratio: More than 80 dB

Frequency respomse: 17 Hz(0 +3/-3 dB)

to 20 kHz(-1 +2/-2 dB)

General

Load impedance: 4.7 kohm

Output level: More than 2.5 V x 4

(at CD 1 kHz 0dB)

Typ. 3.0 V x 4

Power supply voltage: DC13.2 V (10.8 V to 15.6 V)

Negative ground

Current consumption: Less than 3A

Less than 5mA(at Backup)

Dimensions(mm): 178 (W) x 100 (H) x 165.3 (D)

(Main section)

264.7 (W) x 100 (H)

(Escutcheon section)

Weight: 2.6 kg

NOTE

We cannot supply PWB with component parts in principle.

When a circuit on PWB has failure , please repair it by com-

ponent parts base. Parts which are not mentioned in ser-

vice manual are not supplied.

Specifications and design arevsubject to change without

notice for further improvement.

COMPONENTS

PF-2551I-A

Main unit ----------- 1

CAUTIONS

In case that the main unit or the CD changer mechanism is

transported for repair, the lock pin(966-0653-00) must be

set to fix the mechanism assy.

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This document describes the Clarion Subaru Automotive Genuine AM/FM 6-Disc CD Changer Deck, Model PF-25511-A. It is a car audio system designed for Subaru vehicles, featuring a multi-disc CD changer, AM/FM radio, and various audio control functions.

Function Description

The PF-25511-A serves as a central audio unit for a vehicle, providing entertainment through radio broadcasts and CD playback. Its core functions include:

AM/FM Radio Tuner: Receives both AM and FM radio signals, with PLL frequency synthesizer tuning for precise station selection. It supports DX/Local selection and stereo reception.
6-Disc CD Changer: Allows for the loading and playback of up to six audio CDs, providing extended music playback without manual disc changes.
Audio Control: Features an electronic volume control (E-VOL) with bass, treble, fader, and balance adjustments. It also includes a loudness function.
System Integration: Designed to integrate with the vehicle's electrical system, including ACC detection, illumination control, and steering wheel remote control input. It communicates with other components via a Ce-NET serial data bus and an F-BUS for system control and audio muting.
Display: Utilizes a VFD (Vacuum Fluorescent Display) for displaying information such as station frequency, track number, and other operational data.
Safety Features: Incorporates safety mechanisms for fire and voltage protection, emphasizing the use of specified parts for repairs.

Important Technical Specifications

Radio Section:

Tuning System: PLL Frequency Synthesizer
Tuning Voltage: AM: 531 kHz to 1,629 kHz; FM: 87.9 MHz to 108 MHz
Intermediate Frequency: AM: 450 kHz; FM: 10.7 MHz
Quieting Sensitivity: AM: Less than 41 dBu (at 20 dB S/N); FM: Less than 15 dBu (at 30 dB S/N)
Separation: FM: More than 20 dB
Auto Tuning Stop Sensitivity: AM: 37 +/-6 dBu; FM: 26 +/-6 dBu

CD Section:

Disc: Compact disc (8 cm / 12 cm)
Separation: More than 65 dB (at 20 kHz LPF)
S/N Ratio: More than 90 dB
Frequency Response: 17 Hz to (+3/-3 dB) to 20 kHz (+1/-2 dB)

General:

Load Impedance: 4.7 kOhm
Output Level: More than 2.25 V x 4 (at CD 0 dB, 0 dB)
Power Supply Voltage: DC 13.2 V (10.8 V to 15.6 V) (Negative ground)
Current Consumption: Less than 5A (at Backup); Less than 5mA (at Backup)
Dimensions (mm): 178 (W) x 100 (H) x 165.3 (D) (Main section); 264.7 (W) x 100 (H) (Escutcheon section)
Weight: 2.6 kg

Usage Features

Multi-Disc Convenience: The 6-disc CD changer allows users to load multiple CDs, providing a continuous music experience without needing to swap discs frequently.
Electronic Volume and Tone Controls: Users can easily adjust volume, bass, treble, fader (front-rear balance), and balance (left-right balance) to customize their listening experience.
Loudness Function: Enhances bass and treble at low volume levels, compensating for the human ear's reduced sensitivity to these frequencies.
System Integration: Designed for seamless operation within a Subaru vehicle, supporting steering wheel controls and vehicle illumination for a cohesive user experience.
VFD Display: Provides clear and easy-to-read information about the current audio source, track, or station.

Maintenance Features

The manual provides detailed instructions and warnings for engineers performing repair or inspection:

Use Specified Parts: Emphasizes the critical importance of using only genuine or equivalent specified parts for replacements to maintain safety features (fire and voltage protection) and prevent product liability issues.
Original Placement of Parts and Wiring: Instructions to ensure that all parts and wiring are returned to their original positions after repair, especially insulation tubes, bonding, and wiring clamps, to prevent issues with heated or high-voltage parts.
Safety Check After Repair: Mandates a thorough check to ensure all screws, parts, and wires are securely in place to prevent secondary problems.
Caution with Automobile Wiring: Advises disconnecting the battery terminal before working on automobile wiring to prevent short circuits or fires.
Cautions Regarding Chips: Recommends against reusing removed chips, even if they appear normal, and to replace them with new ones. Special care is advised for tantalum capacitors due to heat susceptibility.
Handling Flexible PWB: Provides guidelines for soldering flexible PWBs, including maintaining an iron tip temperature of around 270°C and avoiding repeated or forceful application of the iron tip.
Power Off During Disassembly: Instructs to turn off the unit during disassembly and parts replacement, and to recheck all work before applying power.
Cautions for Optical Pickup: Warns about potential eye damage from prolonged viewing of the laser diode (keep eyes more than 30cm away) and the risk of electrostatic damage to the laser diode.
Laser Diode Handling: Specifies that laser diode terminals are shorted for transportation to prevent electrostatic damage and that this short should be opened after replacement and re-applied when removing the pickup.
Actuator Handling: Cautions against placing magnetic materials near the actuator due to its powerful magnetic circuit, which could alter its characteristics. Also, ensure no foreign substances enter ventilation slots.
Lens Cleaning: Recommends using a small amount of isopropyl alcohol on lens paper to gently clean the optical lens to maintain performance.
Adjustment Procedures: Includes specific adjustment steps for FM and Diversity functions, such as inputting a specified signal and adjusting voltage on a test point (TP1) with VR100 using an SSG (Standard Signal Generator) and Milli-volt meter.