JVC RX-D Series Installation guide

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