BOSE 264563-TT Schematic

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Page 1

CLASS

DWG NO.

REVISIONS REV DESCRIPTION ENG DATE 00 INITIAL RELEASE PETE CORTESE/

4/09

JIM SLOWEY

SIGNATURES REQUIRED

PRINT NAME SIGNATURE

TSG REPRESENTATIVE JIM SLOWEY CELL LEAD MANEL THOMPSON REPAIR SUPERVISOR

KEVIN KING

OTHER(________________)

TSG TECHNICIAN

Pete

DATE

4/09

FRAMINGHAM, MA 01701-9168

Cortese

APPLICABLE DOCUMENTS: DESCRIPTION

SERVICE MANUAL: 264563-SM

Lifestyle AV-28 Media Center

Troubleshooting Tips

SIZE

FSCM

32108

CLASS

DWG NO.

264563-TT

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Troubleshooting Tips

Lifestyle AV-28 Media Center

Refer to the Lifestyle AV-28 Media Center service manual, reference number 264563-SM for schematics, PCB layouts and parts lists located on service web site.

Preventative Repair Measures Note: Perform the following on all units returned for repair.

Product Check Action

AV28 Media Center C839 on main pcb On all units with a date code before 2200 that come

in for repair, inspect the orientation of C839 located on the main PCB. The negative (marked) lead of the capacitor should face toward J102 and away from Y700. If it doesn't, remove surface mount electrolytic capacitor C839 and install a new part (part number 256772-331A) in the direction indicated. Refer to service bulletin 264563-B3.

AV28 Media Center J104 on tuner pcb Check for solder fractures. AV28 Media Center Software revision Update to latest revision AV28 Media Center CD/DVD power cable Replace on all units. Part # 304996-265. Refer to

service bulletin 271000-B4.

AV28 Media Center DVD drive part number.

Refer to service bulletin 264563-B5.

USA units built between 6/3/02 and 9/12/02 should be checked for the presence of DVD drive part number 266439-001 (DOM range 2190 - 2255). If a DVD drive part number 266439-001 is found in an AV28 media center, the drive must be replaced.

Troubleshooting Tips

Product Symptom Check Action

AV28 Media Center

No Power Solder fracture on

J104 on tuner pcb

No Power FB1 on tuner pcb,

refer to service bulletin 264563-B2.

No Power Check for 12V, 5V

and 3.3V at switching power supply IC’s U302 (tuner pcb), U802 and U803 (main pcb).

No Power C301 and C310 on

tuner pcb Unit has power, but will not boot up

CD/DVD drive Occasionally a software issue with the

Repair fractured solder joint.

If the resistance measurement is greater than 1.00 ohm or there is any sign of physical damage to the part, replace FB1 part number 256116-181.

Check the power supply for the 12V, 5V, and

3.3V at switching power supply IC's U802, U803 and U302 pins 2 and 3. If any of the voltages are not present first check to see that the input voltage 33VDC is present at pins 8 and 9. If the input voltage is there replace the corresponding IC with part # 193486-001.

Check for solder fractures.

CD/DVD drive will cause the unit not to boot up. Attempt to power the unit on with a test drive, replace if defective.

Framingham, MA 01701-9168

SIZE

FSCM 32108

CLASS

DWG NO.

264563-TT

SHEET

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Troubleshooting Tips, continued

Product Symptom Check Action

AV28 Media Center AV28 Media Center

AV28 Media Center

No Display Q101 Check for shorted transistor Q101 on main

pcb. Part # 260354-001. No dialogue from left and right channels when in 5 speaker mode. Unit has power, but will not boot up

No audio, no remote response

No Video Check for 8Vdc at

No audio from Zone 1.

Flash IC U2 on main pcb

Flash IC U2 on main pcb,

Check for 10V at U302 pin2 on tuner pcb.

VR1 pin 4 on main pcb Check Zone 1 protocol setting on display menu. R342, R341, R340 and T301 on main pcb.

If resetting the console and the bass module

does not correct this issue, replace flash IC

U2. Part # 307513.

If all power supply voltages are present and

a test CD/DVD drive does not work, flash IC

U2 may be defective. Replace IC part #

307513 if defective.

If the +10V is not present U201 on main pcb

may be internally shorted to ground through

pin 3. Lift the pin to see if the 10V comes

back. If U201 is not shorted, the following

components on the main board also use the

10V supply: U204, U205, U305, U405 and

U504.

If the 8V supply is missing, check for shorted

cap C627 on bottom side of main pcb.

If Zone 1 protocol is set to legacy, there will

be no audio from Zone 1.

Using an oscilloscope, check for a SPDIF

signal at pins 1 and 2 of din connector J301.

If the signal is not present check U306 pin

26. If the signal is coming out of U306 check

the following components for open: R342,

R341, R340 and T301.

AV28 Media Center

Framingham, MA 01701-9168

SIZE

FSCM 32108

CLASS

9-Pin Din, Pin Location

To measure T301, check for continuity

between pins 1 and 4, and pins 5 and 8.

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