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SONY DVPNS900V
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY DVPNS900V Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 115 (click to view)
3. Specific item failed in Diag All Check A mounting failure of IC or faulty IC for that item is doubtful. If �1901NG� is displayed, a loose connection of CN601, mounting failure of AUDIO DSP (IC601), or faulty IC is doubtful. 4. Picture and sound are not outputted Check the CN601 & 501 for connection, and the flat cable for damage or loose connection. 5. Picture is outputted, but sound is not outputted A mounting failure of AUDIO DSP (IC601) or AUDIO DAC (IC603, IC604), power supply failure, or faulty IC is doubtful. 6. Sound is outputted, but picture is not outputted Using an oscilloscope, measure the yd, yh, yl, uf, uj, and i; pins of AVD (IC502) to check if analog signals are outputted respectively. If not outputted, a soldering failure of that line, a short with other line, missing capacitor or resistor, or faulty AVD is doubtful.

4. At [POWER] button ON, LED lights in green but fluorescent display tube does not light Loose connection between power supply block and IF-87 board, loose connection of connectors, or faulty IF-87 board is doubtful. 5. Picture and sound are not outputted Loose connection between power supply block and IF-87 board or between IF-87 and VP-57/EV-14 board or between VP-57/EV14 board and MB-101 board, loose connection of connectors, or faulty VP-57/EV-14 board is doubtful. 6. Picture is out outputted correctly A mounting failure of BNR (IC601) on the MB-101 board, or faulty AVD (IC502) or ARP&SERVO (IC302), or faulty 27 MHz output (frequency, waveform) from 27-1OUT (3, 4 pin) of PLL (IC103) is doubtful.

6-11-5. Power is not Supplied
1. Red LED does not light when AC is supplied The power (EVER +3.3 V) is not supplied to the IF CON (IC703) on the FL-125 board. The X701 does not oscillate. 2. At [POWER] button ON, LED is kept in red (standby state) Any button has been pressed. The voltage at PONCHK (e; pin) of the IF CON (IC703) on the FL-125 board exceeds 0.5 V. 3. At [POWER] button ON, LED lights in green but returns to red (standby state) after several seconds The PONCHK (e; pin) of the IF CON (IC703) on the FL-125 board is abnormal (slow rising from 0.5 V to more than 1.5 V, or voltage not rising to more than 1.5 V). The SYSTEM CONTROL (IC104) on the MB-101 board is faulty.

6-11-3. Drive Auto Adjustment stops by an error
Faulty analog circuits of ARP&SERVO (IC302) or faulty peripheral circuits of DIGITAL SERVO (IC202) on the MB-101 board, faulty optical pickup, or loose connection of flat cable is doubtful.

6-11-4. Power is Supplied but Unstable
If Syscon Diagnosis completed successfully, basically the boards other than MB-101 board, connection, optical pickup, or mechanical deck will be faulty. 1. Red LED does not light when AC is supplied Check if the specified voltage is outputted from the EVER �11 V (3 pin), EVER +3.3 V (qa pin), and EVER +11 V (qd pin) of CN201 or CN920 in the power supply block. If not outputted, the power supply block will be faulty. 2. At [POWER] button ON, LED does not light in green even once, but kept in red (standby state) Check if the specified voltage is outputted from the EVER �11 V (3 pin), EVER +3.3 V (qa pin), and EVER +11 V (qd pin) of CN201 or CN920 in the power supply block. If not outputted, the power supply block will be faulty. Check the P-CONT (2 pin) of CN401 on the IF-84 board if it becomes �H�. If not �H�, a soldering failure of that line, a short with other line, missing capacitor or resistor, faulty AVD (IC502), loose connection between power supply block and IF-87 board, loose connection of connectors, faulty power supply block, or faulty IF-87 board is doubtful. 3. At [POWER] button ON, LED lights in green but returns to red (standby state) after several seconds (e.g. it returns to standby state after �SONY DVD� was displayed) There is no regularity between faulty parts and timing when the set returns to the standby state). Check if the specified voltage is outputted from the power supply block. If not outputted, the power supply block will be faulty. Check the XFRRST (7 pin) of CN101 on the MB-101 board if it is fixed to �L�, or the XIBUSY (6 pin), XIFCS (5 pin), SI0 (4 pin), SO0 (3 pin) and SC0 (2 pin) of CN101 if they are fixed to �L� or �H�. If fixed to �L� or �H�, a soldering failure of that line, a short with other line, missing capacitor or resistor, or faulty AVD (IC502) is doubtful. If not fixed to �L� or �H�, loose connection between power supply block and IF-87 board or between IF-87 board and MB-101 board, loose connection of connectors, or faulty IF-87 board is doubtful.

6-19 E 6-19

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