JVC RX-D Series Guida all'installazione

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TRAINING BOOK

FOR DIGITAL AMPLIFIER RECEIVER RX-D… SERIES

By JSCA ENGINEERING DEPARTMENT JUNE 2006

Second Edit November 2006

CONTENT

• OVERALL

• POWER SUPPLY

• POWER PROTECTION

• DIGITAL AMPLIFIER

• AUDIO DIGITAL PROCESS

• VIDEO DIGITAL PROCESS & HDMI *

• USB WIRE OR WIRELESS**

*

THESE FEATURES APPLY TO RX-D401//402/701/702 ONLY.

**

WIRELESS APPLIES TO RX-D301/302/701/702 ONLY.

OVERALL BLOCK DIAGRAM

Signal Flow and DC Power Supply

*

IN

=DIGITAL SIGNAL =ANALOG SIGNAL

DVD A. Multi

OVERALL BLOCK DIAGRAM

note

•A AUDIO means Analog audio, D-OUT means Digital audio output.

• The HDMI outputs video only, even when the HDMI input has both

video & audio data. In the future models, the HDMI will output both A

& V data.

• The digital audio output is not available on models RX-D201/202.

The output format is the same as the digital input signal; other audio

input signals (including HDMI & USB) cannot go through the

DIGITAL OUT.

• The front left & right speaker out audio is applied to headphones.

The CPU will turn off the 7 speaker relays after it detects the

headphone jack is plugged in.

• The ‘DVD analog multi channel’ input audio bypasses the DSP

board, and goes into Master Volume Board directly.

• directly.

POWER SUPPLY BLOCK DIAGRAM

‘AMP_+/-B’ switch regulator

POWER SUPPLY 1/5

CN530-5

Q171

CN114-3

D+5V_DSP

CN114-4

R152 +12V_RY CN530-7

PWM PCB

IC201/301

IC401/801

Master Clock PCB

Regulate

PCB

POWER SUPPLY 1/5

note

•The power supply circuits for 2005 year of RX-D… series are similar. One main

difference is the ‘D+5V_HDMI’ is not in models RX-D201/202/301/302.

•There are two AC power transformers in the unit.

1. T101 for standby power: supplies D+5V and B+5V_Mi DC power for CPU IC501

and RY+9V (power ON/OFF relay circuit).

2. T102 for unit operation after power on: There are more than 15 different DC

voltages provided for unit operation after power is turned on.

•The DC voltages: +B, AMP+B, AMP-B+12V and DCDC_-B+12V all vary (along

with output volume) referenced to ground. The ‘–B’ voltage is -50v~ -62v

referenced to ground. The label ‘DCDC_-B+12V’ DC voltage means this is the

DC voltage supply to the DCDC converter circuit, the +12 DC refers to –B; if

referenced to ground, it is -38v~-50v.

•The +B and AMP+B voltages are higher in models RX-D402/702, because the

output power is higher than RX-D201/202.

•The +2.5v, DCDC_+12V, DCDC_-B+12V, AMP-B+12V, D+5V_DSP and

D+5V_HDMI are not produced in the main PCB.

•You could check all of the voltages at the indicated (underlined) locations

without any extension cable, before or after power is turned on. (See the next

page)

•Some additional DC voltages are produced in ‘Regulate PCB’ and ‘Master clock

PCB’.

POWER SUPPLY 2/5

CN114

3. D+5V_DSP

4. D+5V_HDMI

*

(CN130)

*

The ’D+5V_HDMI’ for models RX-D401/402/702 only.

The ‘AMP_+/-B’ switch regulator

composes three sections:

1. MOSFET switch circuit (the important parts are

Q1101/1102, D1107/1108, L1101/1102,

C1117/1118…)

2. Switch driver circuit-IC101.

3. DC-DC Converter Control Board

DC-DC

CONVERTER

CONTROL

MOSFET

DRIVE

IC101

+

MOSFET

SWITCH

Q1101/1102…

_

1

3 2

AMP_B

7 CHANNEL

POWER

AMP

AMP_ +/-B

LEVEL

CONTROL

CPU IC501

SOUND

LEVEL

DETECT

POWER SUPPLY 3/5

‘AMP_ +/-B’ switch regulator-1a

The CEMF current (via D1107/8) loop

after Q1101/1102 switch off.

IC101

+B

AMP_+B

-B

AMP_-B

-B +12V

+12V

V. feedback

V.out_det.

POWER SUPPLY 3/5