Onkyo TX 906 Service Manual
This is the 54 pages manual for Onkyo TX 906 Service Manual.
Read or download the pdf for free.
If you want to contribute, please mail your pdfs to info@audioservicemanuals.com.
Extracted text from Onkyo TX 906 Service Manual (Ocr-read)
Page 1
ONKYO SERVICE MANUAL
TX~904/ 906
Ref. No. OM3399
QUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODEL TX-904
MODEL TX-906
Black model
BHUD. BHUI)N. BHUDC
120V AC. (fllH7
BHUP
230V AC. SUHZ
BHUW
l2ll/ZZUV AC SO/GOHZ
BIIUQA
240V AC Slle
SAFETY-RELATED COMPONENT WARNING
COMPONENTS INDENTIFIED RV MARK A().\
THE SCHEMATIC DIAGRAM AND IN IIII:
PARTS LIST ARE CRITICAL FOR RISK ()l FIRIE
AND ELECTRIC SHOCK, REPLACI: 'IIII'SI:
COMPONENTS WITH ONKYO PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL,
MAKE LEAKAGE-CURRENT ()R RFSISTANCI"
MEASUREMENTS TO DETERMINE 'l HAT
EXPOSED PARTS ARE ACCEPTABLY
INSULATED FROM THE SUPPLY ('IRCUI'I'
BEFORE RETURNING THL APPLIANCE. 'I()
THE CUSTOMER
l ONKYot
l
l mum cumpnutms ,
-1H
TABLE OF CONTENTS
Specifications..
Exploded View Model TX-906,
Model TX-904
Model TX-906
Model TX-904 ......................
Block diagram Tuner section 120V model.
ax:-
Parts list
Other modelsm...
Model "IX-906.
Model TX-904.
Amplifier section
Mosooqm
Microprocessor descriptions
Connection diagram .....................................................
Terminal description .................
1C block diagrams and descriptions
Adjustment procedures ................
Printed circuit board views t
Schematic diagram ,,
Model "TX-906 120V model ..........................
Other models
120V model
Other models .......................................
Model TXu904
Printed circuit board
Model TX-904 ..
Service procedures,..
Packing procednrcs ........................................................... 74
Page 23
904/906
0703
uPD17103CX-531 (Remote Control Decoder)
U701 0703 0715
Transmitter V Preamp. Decoder Buffer 7 Bus
Infrared GPlUSOXS Line
0501 E E GND
oscz [j E POBZ ~ STAND-BY
RESET B E P051 ~ RECE-tvs
REMOTE-IN ~ P000 Q E POBO ~ -VOL IND
Pl'l SENS PODl E E POC3 - VOL UP
POWER » P002 E E P002 ~ VOL 00th
srs IN ~ P003 E E POCI ~ PLAYER
v00 E 3 P000 ~ SYS OUT
Pin No. lSymbol Terminal Description
1 OSC] OSC Connect to the 8.00MHz ceramic oscillator.
2 OSCZ
3 l RES RESEl System reset terminal, Active low.
4 PODO fiEMOTE LN Signal input termtnal from preamp. for remote control. Active low.
5 PODI PHONO SENES Phono detection input terminal. Active low.
6 PODZ POWER Stand-by detection input terminal. During low Input. only the POWER code is decoded.
7 POD3 SYS lN System code input terminal.
8 Von +B Power supply terminal.
9 POCD SYS UUl Output at this terminal are the custom code (16bits) remote control code input to REMOTE
IN. data code (Shits), and the serial code (12bits) that has been convened corresponding to
the decoded data code (Sbits)
10 POC] PLAYER When the player PLAY/REEJECI' is input. a high pulse of 200ms is output.
11 POCZ VOL DOWN When the volume DOWN code ts input. a high pulse of 120ms is output.
12 POC3 VOL UP When the volume UP code ts input. a high pulse of 120ms is output.
13 P080 lND During the output of VOLUME UP/DOWN, a pulse ( T T T Tl: 250ms) is output
(Not used)
14 FOB] m This is the display output for remote control reception. Output is low when decoded code is
being recieved,
15 P082 STANDABY STAND-BY indication terminal.
16 vs: GND Ground terminal.
-23-