Onkyo HTR 557 Service Manual

Page 1

ONKYO SERVICE MANUAL

HT-R557

Ref. No. 4028
092007

AV RECEIVER
MODEL HT-R557

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RC-681 M

HT-R557 for HT-SP904 Black model

B MDD 120V AC, 60Hz

HT-R557 for HT-SR750 Black model

B MDD 120V AC, 60Hz

SAFETY-RELATED COMPONENT
WA R N I N G ! !

COMPONENTS IDENTIFIED BY MARK A ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.

MAKE LEAKAGE-CURRENT 0R RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE To THE CUSTOMER.

ONKYO®

IMAGINATIVE SIGHT SI SOUND

Page 54

05E

IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS-7
0301 : CS42518 (8-Ch Codec with S/PDIF Receiver)-2/4

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CX_SD|N1 [ 1 48 ] RXP1/GPO1
CXgSCLK l: 2 47 ] RXP1/GPO1
CX,LFICK [ 3 46 ] RXP1/GPO1
VD [ 4 45 ] RXP1/GPO1
DGND [ 5 44 ] RXP1/GPO1
VLC [ 6 43 ] RXP1/GP01
SCL/CCLK [ 7 42 ] RXP1/GPO1
SDA/ODOUT [ a CS 4251 8 41 ]VARX
AD1/CDIN [ 9 40 ] AGND
ADO/CS [ 1o 39 ] LPFLT
INT [ 11 38 ] MUTEC
FIST [ 12 37 ] AOUTA1-
AINR- [13 36 ] AOUTA1+
AINR+ [14 35 ] AOUTB1+

AINL+ [ 15 34 ] AOUTB1-

AINL- [ 16 33 ] AOUTA2-
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TERMINAL DESCRIPTION
Name Pin No. Function
CX7SDIN1 l Codec Serial Audio Data Input (Input) - Input for two's complement serial audio data
CX7SDIN2 64
CX,SDIN3 63
CX7SDIN4 62
CX7SCLK 2 CODEC Serial Clock (Input/Output) - Serial clock for the CODEC serial audio interface
CX7LRCK 3 CODEC Left Right Clock (Input! Output) - Determines which channel, Left or Right, is currently active on
the CODEC serial audio data line
VD 4 Digital Power (Input) - Positive power supply for the digital section.
51
DGND 5 Digital Ground (Input) - Ground reference Should be connected to digital ground.
52
VLC 6 Control Port Power (Input) - Determines the required signal level for the control port.
SCL/CCLK 7 Serial Control Port Clock (Input) - Serial clock for the serial control port Requires an external pull-up
resistor to the logic interface voltage in 12C mode as shown in the Typical Connection Diagram.
SDA/CDOUT 8 Serial Control Data (Input/Output) - SDA is a data 1/0 line in IC mode and requires an external pull-up
resistor to the logic interface voltage, as shown in the Typical connection Diagram. CDOUT is the output
data line for the control port interface in SPI mode.
ADI/CDIN 9 Address Bit 1 (12C)/Serial Control Data (SPI) (Input) - ADl a chip address pin in 12C mode; CDIN is
the input data line for control port interface in SPI mode.