STR-DH540 (serv.man2) - Sony Audio Service Manual (repair manual)

str-dh540 (serv.man2) service manual
Model
STR-DH540 (serv.man2)
Pages
8
Size
40.84 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / SUPPLEMENT-1
File
str-dh540-sm2.pdf
Date

Read Sony STR-DH540 (serv.man2) Service Manual online

SERVICE MANUAL
1
SUPPLEMENT-1
Subject: Addition of SERVICING NOTES (TROUBLESHOOTING)
File this supplement with the service manual.
STR-DH540
Ver. 1.1  2013.04
9-890-614-81
US Model
Canadian Model
AEP Model
UK Model
Australian Model
STR-DH540
2
SECTION 1
SERVICING NOTES
TROUBLESHOOTING
Flow of Repair (when sound is not outputted) (1/5)
NG
START
OK
 
OK
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
NG
OK
OK
OK
NG
Check the surrounding circuit of power transistor (example:  Q600 on the MAIN board) and the surrounding circuit of  power amplifier circuit (example: FL on the MAIN board),  and exchange the defective parts. 
– Continued on  page 
– 
Measure the power amplifier circuit (example: FL on the MAIN  board) with a tester, and check the following things.  1. Check that between the power supply line and the ground does 
not short-circuit. 
2. Check that resistance is normal. 
1. Check the R2140, R2141 Short or Open circuit?  2. Check Main Board +7 V Regulator. 
Check that voltage of the follow pin 2.8 V.  Digital Board: IC2100 Pin 99 (Fuse_Det) 
Check that the “PROTECT” is not  displayed on the fluorescent  indicator tube. 
Check that voltage of the follow pin 0.6 V.  Digital Board: IC2100 Pin 67, 68  
 
 
 (Temp_Sensor_1&2) 
Check that voltage of the following pin is 3.3 V.  DIGITAL board: IC2100 pin 92 (PROTECT) 
Check that the defect is not improved, even if you  do the following works. 1. Short-circuit the both ends of the C2186 on the 
DIGITAL board.
2. Perform the “SHIPMENT MODE” (refer to 
page 10 on the original service manual).
Check the IC2100 on the DIGITAL board and the  surrounding circuit, and exchange the defective  parts. 
Check the surrounding circuit, and exchange  the defective parts. 
Check that between the +59 V line/–59 V line and  the ground does not short-circuit. (Main Board) 
Check the surrounding circuit, and exchange the  defective parts. 
Measure the power transistor (example: Q600 on  the MAIN board) with a tester, and check the  following things.  1. Check that the circuit does not short-circuit.  2. Check that resistance is normal. 
Check the surrounding circuit of power transistor  (example: Q600 on the MAIN board) and the  surrounding circuit of power amplifier on the MAIN  board, and exchange the defective parts. 
Digital Board: Check R2115, R2134, C2164, C2165,     
Short to Gnd?
Main Board: Check TH251, TH252 
Check that the following fuses are not damaged. MAIN board: F912, F913 STANDBY board: F901 
Check that the power transistor (example: Q600 on the  MAIN board), the power amplifier circuit and the  surrounding circuit are not defect. 
Check that the surrounding circuit of current detect  (example: Q605 and Q604 on the MAIN board) is not  defect. 
Check the surrounding circuit of protector  (example: Q320 on the MAIN board), and exchange the  defective parts. 
STR-DH540
3
Flow of Repair (when sound is not outputted) (2/5)
NG
OK
OK
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
– Continued on  page 4 – 
Check the following parts and the surrounding circuit, and  exchange the defective parts. DIGITAL board: IC2100        HP board: J101 MAIN board: Q375, RY921
Check the following parts and the surrounding circuit, and  exchange the defective parts. DIGITAL board: IC2100, IC2502
Check the following parts and the surrounding circuit, and  exchange the defective parts. DIGITAL board: IC2100, IC2104
Check the following parts and the surrounding circuit, and  exchange the defective parts. DIGITAL board: IC2100 MAIN board: IC400
Perform the “SOFTWARE VERSION DISPLAY MODE”  (refer to page 10 on the original service manual), and  check that the DSP version is not “0.00”.
Check that data is outputted from the following pins. DIGITAL board: IC2107 pin 16, 19, 20, 21
Check that sound occurs from the RY921 on the  MAIN board by inserting and removing headphone. 
Press the [MUTING] button on the remote  commander once, and check that the sound is  outputted from this unit. 
Explain the settings of this unit to the customer.  
Check that data is outputted from the following  pins.  DIGITAL board: IC2502 pin 48, 50, 41, 56 
Check that data is outputted from the following  pins.  DIGITAL board: IC2104  pin 15, 16, 19, 20, 21, 22, 26, 27 
Check that data is inputted to the following pins.  MAIN board: IC400  pin 63, 64, 66 ~ 73 
Check the surrounding circuit of power transistor  (example: Q600 on the MAIN board) and the  surrounding circuit of power amplifier circuit, and  exchange the defective parts. 
Press the [A.F.D.] button to select  the “MULTI ST”, and check that the  sound by various source (example:  coaxial input, analog input) is  outputted from all the channels (FL/  FR/SL/SR/SBL/SBR/C/SW). 
Check that voltage of pins of the IC2502 on the  DIGITAL board is the following value. pin 5: 1.1 V        pin 4: 3.3 V
Check the following parts and the surrounding  circuit, and exchange the defective parts. DIGITAL board: IC2100, IC2502, IC2503, X2500
Check the following parts and the surrounding  circuit, and exchange the defective parts. DIGITAL board: IC2100, IC2107, X2102
Check the following parts and the surrounding  circuit, and exchange the defective parts. DIGITAL board: IC2500 DCDC board: IC1902, IC1903
STR-DH540
4
Flow of Repair (when sound is not outputted) (3/5)
NG
NG
NG
OK
OK
OK
OK
OK
NG
NG
– Continued on  page 5 
– 
Check the following parts and the surrounding circuit, and  exchange the defective parts.  DIGITAL board: IC2105, IC2107 
Check the following parts and the surrounding circuit, and  exchange the defective parts.  MAIN board: IC2351, IC2352  DIGITAL board: IC2107 
Check that “COAX” is displayed on the fluorescent  indicator tube.
Check that “OPT” is displayed on the fluorescent  indicator
Check the following parts and the surrounding  circuit, and exchange the defective parts. DIGITAL board: IC2104
Check the following parts and the surrounding  circuit, and exchange the defective parts.  MAIN board: IC400, J401, J402 
Check that the sound from the coaxial input is  outputted.
Check that the sound from the optical input is  outputted. 
Check that the sound from the analog input is  outputted, when the sound field is “A.F.D. AUTO”. 
Page of 8
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Here you can read online and download Sony STR-DH540 (serv.man2) Service Manual in PDF. STR-DH540 (serv.man2) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony STR-DH540 (serv.man2) Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.