Sony XM-1505SX, XM-1805GX Service manual

XM-1505SX/1805GX

SERVICE MANUAL

Photo: XM-1805GX

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION 40 watts/150 watts per channel minimum continuous average power into 4 ohms, 5channels driven from 50 Hz (1505SX), 20 Hz (1805GX) to 20 kHz/20 Hz to 300 Hz (subwoofer) with no more than 0.04% total harmonic distortion per Car Audio Ad Hoc Committee standards.

US Model

Canadian Model

XM-1505SX/1805GX

E Model

XM-1505SX

Other Specifications

Circuit system OTL (output transformerless) circuit

Pulse power supply Inputs RCA pin jacks Outputs Speaker terminals

Through out pin jacks Speaker impedance 2 – 8 Ω (stereo)

4 – 8 Ω (when used as a bridging amplifier)

1.3 – 8 Ω (only for subwoofer output) (XM-1805GX)

Maximum outputs 80 watts × 4 + 300 watts × 1 (at 4 Ω) Rated outputs (supply voltage at 14.4 V)

5 Speakers: 1505SX:

40 watts × 4 (50 Hz – 20 kHz, 0.04%

THD, at 4 Ω) + 150 watts × 1 (20 –

300 Hz, 0.04% THD, at 4 Ω)

60 watts × 4 (50 Hz – 20 kHz, 0.1%

THD, at 2 Ω) + 180 watts × 1 (20 –

300 Hz, 0.1% THD, at 2 Ω)

1805GX:

40 watts × 4 (Front: 50 Hz – 20 kHz,

Rear: 20 Hz – 20 kHz, 0.04% THD, at

4 Ω) + 150 watts × 1 (20 – 300 Hz,

0.04% THD, at 4 Ω)

60 watts × 4 (Front: 50 Hz – 20 kHz,

Rear: 20 Hz – 20 kHz, 0.1% THD, at

2 Ω) + 180 watts × 1 (20 – 300 Hz,

0.1% THD, at 2 Ω)

3 Speakers: 120 watts × 2 (50 Hz – 20 kHz, 0.1%

THD, at 4 Ω) + 150 watts × 1 (20 –

300 Hz, 0.04% THD, at 4 Ω)

Frequency response 5 Hz – 50 kHz ( dB) Harmonic distortion 0.005% or less (at 1 kHz, 4 Ω) Input level adjustment range

0.2 – 6.0 V (RCA pin jacks) High-pass filter 50 – 300 Hz, –12 dB/oct Low-pass filter 50 – 300 Hz, –12 dB/oct Phase shift adjustment range (XM-1805GX)

0° – 180° (at 40 Hz) (only for subwoofer output)

Power requirements 12 V DC car battery

(negative ground) Power supply voltage 10.5 – 16 V Current drain at rated output : 42 A

Remote input : 1.0 mA Dimensions Approx. 358 × 50 × 264 mm

(w/h/d) (14

projecting parts and controls Mass Approx. 3.5 kg (7 lb. 11 oz.) not incl. accessories Supplied accessories Mounting screws (4)

Design and specifications are subject to change without notice.

+0 –3

1/8 × 2 1/4 × 10 1/2 in.) not incl.

STEREO POWER AMPLIFIER

SECTION 1

SERVICE NOTE

TABLE OF CONTENTS

1. SERVICE NOTE................................................................. 2

2. GENERAL

Location and Function of Controls.......................................... 3

Connections ............................................................................. 4

3. DISASSEMBLY

3-1. Plate, Bottom ....................................................................... 6

3-2. Amp Board Section ............................................................. 6

3-3. Amp Board, HPF Board, LPF Board................................... 7

3-4. LED Board........................................................................... 7

4. ELECTRICAL ADJUSTMENT...................................... 8

5. DIAGRAMS

5-1. Block Diagram..................................................................... 9

5-2. Printed Wiring Board –Amp Section– ............................... 11

5-3. Schematic Diagram –Amp Section (1/2)–......................... 12

5-4. Schematic Diagram –Amp Section (2/2)–......................... 13

5-5. Printed Wiring Boards –HPF, LPF, LED Section–............ 14

5-6. Schematic Diagram –HPF, LPF, LED Section– ................ 15

6. EXPLODED VIEWS

6-1. Heat Sink (Main) Section .................................................. 16

6-2. Amp Board Section ........................................................... 16

7. ELECTRICAL PARTS LIST......................................... 17

NOTE FOR REPLACEMENT OF Q510 AND Q512

When replacing Q510 and Q512, remove C937 and then remove the screw securing the heat sink (retainer plate).

heat sink (retainer plate)

C937

Notes on Chip Component Replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Q512

Q510

SECTION 2

GENERAL

This section is extracted from instruction manual.

456

SECTION 3

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.

3-1. PLATE, BOTTOM

4 P 2.6x2.8

3 BTP 3x6

2 BTP 3x6

1 BTP 3x6

5 plate, bottom

7 sheet, insulating

3-2. AMP BOARD SECTION

6 CNP808

1 B.TT. 3x14

2 B.TT. 3x14

3 B.TT. 3x14

5 AMP board section

3-3. AMP BOARD, HPF BOARD, LPF BOARD

)

2 P 3x8

6 HPF board

5 CNP806

4 BVTT 3x5

7 BVTT 3x5

9 LPF board

0 AMP board

8 CNP807

3-4. LED BOARD

1 P 3x8

3 panel (5ch), front

1 BTP 3x6

2 LED board

heat sink (main

SECTION 4

ELECTRICAL ADJUSTMENT

Bias Adjustment

Note : The Bias adjustment should be performed only if any of

Q106, Q107, Q206, Q207, Q306, Q307, Q406, Q407, Q506 Q507 and Q509 to Q512 are replaced.

Setting :

Stabilized

Power supply

B+,REM terminals

set

GND terminal test points

Procedure :

1. Rotate the variable resistors VR101, VR201, VR301, VR401 and VR501 fully in the clockwise direction to minimize the idling current of the stabilized power supply.

2. The input signal is to be no signal.

3. Set the power voltage to +14.4 V, and turn the remote mode ON (Connect between the REM terminal and B+ terminal).

4. Connect on digital voltmeter between each test points.

5. Adjust VR101, VR201, VR301 and VR401 so that the digital voltmeter reading is 5 ± 0.5 mV.

6. Adjust VR501 so that the digital voltmeter reading is

3.5 ± 0.5 mV.

RV Ref. No. Test points

VR101 TP101 and TP102 VR201 TP201 and TP202 VR301 TP301 and TP302 VR401 TP401 and TP402 VR501 TP501 and TP502

Digital

Voltmeter

+ _

Adjustment Location :

– AMP BOARD (COMPONENT SIDE) –

BIAS ADJUSTMENT

Test Point Location :

– AMP BOARD (CONDUCTOR SIDE) –

TP502

TP501

VR401

BIAS ADJUSTMENT

VR301

VR201

VR101

VR501

BIAS ADJUSTMENT

TP401TP402

TP301 TP302

TP201

TP202

TP101

TP102

+ 18 hidden pages