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PIONEER XV-EV61A/DTXJN
Service Manual


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

Description of PIONEER XV-EV61A/DTXJN 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 131 (click to view)
5

6

7

8

Protection circuit that activates against a POW ERR error
2 When the main power supply becomes LO level because of short-circuit or disconnection of connectors
2 -1 Short-circuit-detection circuit for the amplifier power circuit (+15 V[VP+15], VD+5, -12 V [VA-12]) Circuit for shutting the power off when VP+15, VD+5, or VA-12 is short-circuited to ground (GND) 2 -3 Checking for VA+12 or VM+12 is short to Gnd or Not.
A

E

IF/AF Assy
DVD+12 VD+12 VA+12 Q8771 2SD2012 VP+15 VA+12 VP+15

M

MOD. AMP Assy
VD+5 R108 27k
B

VD+5

VH+ (VP+15) Q101_2/2 C8771 D101 (D102)
B E2 (Q103_2/2) B2 C2 C2 E2

Q101_1/2 E (Q103_1/2)
C

+ +

Q102_2/2 (Q104_2/2)
B2

B
R102 (R105) 10k

to XPROTECT C (µ-com) Q102_1/2 (Q104_1/2)
E

R101 (R104) 1k + C101 (C102) 1/50

B
R109 820 D8701 to XPROTECT (µ-com) GNDM D8702

A

R103 (R106) 10k

D105 (D106) VH– (VA–12)

• In Normal mode, as Q101 (Q103) (E2, B2, C2) and Q102 (Q104) (E2, B2, C2) are on, the voltage at Point A is about 5 V. The voltage at Point B is therefore about the same. As Q101 (Q103) (E, C, B) is off, Q102 (Q104) (E, C, B) is also off. (1) When VH+(VP+15) is short-circuited to GND As the voltage at Point B becomes almost ground potential, and Q101 (Q103) (E, C, B) then Q102 (Q104) (E, C, B) are turned on, the level of XPROTECT becomes low. → The microcomputer detects the XPROTECT level and shuts the power to the unit off. (2) When VH-(VA-12) is short-circuited As the electric potential of VE at Q102 (Q104) (E2, C2, B2) becomes the same as that at VB, Q102 (Q104) (E2, C2, B2) is turned off. Following this, Q101 (Q103) (E2, B2, C2) is turned off, which changes the voltage at Points A and B to a value other than 5 V. Therefore, Q101 (Q103) (E, C, B) then Q102 (Q104) (E, C, B) are turned on, the level of XPROTECT becomes low. (3) When VD+5 is short-circuited The level of the XPROTECT line becomes low. The microcomputer detects the XPROTECT level and shuts the power to the unit off. 2 -2 Short-circuit-detection circuit for the DVD power supply (VP+8)

If VFDP is short-circuited to GND, or if the DC electric potential at FL AC1 becomes GND level (in Normal mode: about -27 V) because of a failure in the DC bias circuit of FL AC1, Q107 then Q115 are turned on, and the level of XPROTECT becomes low. → The microcomputer detects the XPROTECT level and shuts the power to the unit off.

C

3 When the FAN connector is disconnected or when rotation of the fan is interrupted

M

MOD. AMP Assy
VD+5 VPF+15 1/50 R3654 1.8k R8772 R8771 10 10k
C

to XPROTECT (µ-com)

R108 27k
C2

D3658 UDZS7.5B
B

A

Q3651_2/2 RN1901

B2

Q3652 DTA124TK R3657 33(1/4W) FAN+ D3655 1SS355 C8773 FAN– D3656 S5688G R3656 22k V-12F 1/50

D

Q3651_1/2 C3652 D3657 RN1901 47/50 1SS355 R3655 8.2k Q3654 2SD2144S

M

MOD. AMP Assy

VD+5 R108 27k

VP+8 D104 1SS355

If no fan is connected between FAN+ and FAN-, or when the fan cannot rotate because of a foreign object caught in the blades, the BASE of Q3652 becomes OPEN, and Q3652 and Q3651 (E, C,
E

XPROTECT

Q106 DTC124EUA Q107 DTA124EUA TUNER

B) are turned off. Then Q3651 (E2, B2, C2) is turned on, and the level of XPROTECT becomes low. → The microcomputer detects the XPROTECT level and shuts the power to the unit off. When FAN+ and FAN- are short-circuited, the electric potential at Point A becomes higher than GND level by the addition of the values at D3656 and D3657. As this value is lower than that at D3658, Q3651 (E, C, B) is turned off, Q3651 (E2, B2, C2) is turned on, and the level of XPROTECT becomes low.
F

As the TUNER line is fixed to GND level, Q107 is always on. If the level at VP+8 falls to GND level because of short-circuit, etc., Q106 is turned on, and the level of the XPROTECT line becomes low. ← The microcomputer detects the XPROTECT level and shuts the power to the unit off.

XV-EV61
5 6 7 8

C8772 0.047

E2

E

+

R3658 2.2k

131

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