Sony STR-DN840 (serv.man2) Service Manual ▷ View online
STR-DN840
5
Flow of Repair (when sound is not outputted) (4/5)
NG
OK
OK
OK
OK
OK
NG
OK
NG
NG
NG
NG
– Continued on page 6 –
Check that voltages of the connector pins on the Digital board are the following value. DIGITAL board: CN1501 pin 1, 2: +6.0 V CN1501 pin 3, 4: +3.3 V CN1501 pin 5, 6: +3.6 V CN1501 pin 7, 8: +2.0 V CN1500 pin 3, 4: +3.3 V
Check that voltage of the following pin is 3.3 V, 1.3 V DIGITAL board: IC3506 pin 112, 173: 3.3 V (Vout) pin 18, 111, 116: 1.3 V (Vot)
Check that voltage of the following pin is 3.3 V. DIGITAL board: IC3000 pin 57: 3.3 V (INITX)
Check that the X3000 on the DIGITAL board is oscillated normally.
Check the following parts and the surrounding circuit, and exchange the defective parts. DIGITAL board: IC3000
Check the following parts and the surrounding circuit, and exchange the defective parts. DCDC board: IC1901, IC1902, IC1903, IC1904, F940, F941
Check the following parts and the surrounding circuit, and exchange the defective parts. DIGITAL board: IC3506
Check the following parts and the surrounding circuit, and exchange the defective parts. DIGITAL board: IC3001, IC2100
Check the following parts and the surrounding circuit, and exchange the defective parts. DIGITAL board: X3000
Perform the “SOFTWARE VERSION DISPLAY MODE” (refer to page 14 on the original service manual), and check that the video micro-processor version is not “0.00”.
Check that the sound from the HDMI input is outputted.
STR-DN840
6
Flow of Repair (when sound is not outputted) (5/5)
NG
OK
OK
NG
Explain the settings of this unit to the customer.
Check that the speaker pattern setting is normal.
Check the surrounding circuit of power transistor of the channel to which data is not outputted (example: Q600 on the MAIN board) and the surrounding circuit of power amplifier circuit, and exchange the defective parts.
Check that the sound is outputted from each speaker, when the sound field is “A.F.D.”
END
MEMO
STR-DN840
7
STR-DN840
REVISION HISTORY
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Ver.
Date
Description of Revision
1.0
2013.02
New
1.1
2013.05
Addition of SERVICING NOTES (TROUBLESHOOTING) (SUPPLEMENT-1).
Addition of Mexican and Taiwan models.
Add R2303 and R2304 in DIGITAL board.
Change of DIGITAL board (Suffi x 14).
Change procedure of USB UPDATE TEST MODE in page 15.
Change P/N and description for Q321 and Q324.
Change P/N and description for R3625 in DIGITAL board.
Change of MAIN board, DCDC board and STANDBY board (Suffi x 22).
Change illustration of heat sink section in DISASSEMBLY (page 13).
Change illustration of chassis.
Change location of screws in DISASSEMBLY (page 10) and EXPLODED VIEWS (page 74 and 77)
section.
Change location of C2161 in DIGITAL board.
Delete 1 bracket beam support in DISASSEMBLY (page 10) and EXPLODED VIEWS (page 74 and 77)
section.
Delete R3371 in DIGITAL board.
Display
