Onkyo DX 6850 Service Manual

Page 2

REF. NO. 3410

ONKYOQ SERVICE MANUAL

COMPACT DISC PLAYER
MODEL DX-706/MODEL DX-708

Black and Silver models

UDN, UD

120V AC, 60 HZ

UP

230V AC, SOHZ

UW

120/220V AC, 50/60Hz

UQA

240V AC, 50 Hz

SAFETY-RELATED COMPONENT WARNINGLV

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 PARTS NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.

MAKE LEAKAGECURRENT 0R RESISTANCE MEA-
SUREMENTS TO DETERMINE THAT EXPOSEDPARTS
ARE ACCEPTABLY INSULATED FROM THE SUPPLY
CIRCUIT BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER,

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TABLE OF CONTENTS

Specifications

Service procedures i
Laser warning labels
Chunk-exploded View DX-706 .
Pans Iisl Dx-706 ,.
Chassiscxploded Vie
Pans Iisi DX-708
Mechanism-exploded View
Parts list

Caution on replacemenl of pickup
Pmuecu'm. 0! eyes [mm laser beam during servicing
IC block diagrams and descriptions ..
Adjustment procedures
Troubleshooting guide
Primed circuit board View from bottom side
Primed circuit board~pms list DX-706 .
Primed circuil boardwarls list DX-708 .
Printed circuit board View from helium si e
Block diagram DX-706
Block diagram DX-708
Packing view

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Page 28

708

No. SYMBOL 110 DESCRIPTION N0, SYMBOL 1/0 DESCRIPTION
1 FOK 1 Focus 0K input 42 DA08 0 DA08 GFS output ' fl
2 st 0 Output tilter changeover output of spindle motor 43 DA07 o DA07 RFCK output 1
't MON 0 spindle motor control output 44 mos 0 DA06 c2P0 output 771 t
4 MDP 0 Spindle motor servo control 45 DA05 0 DA05 XRAOF output 77 77* 7 l
5 MDS 0 spindle motor servo control 46 DA04 0 DA04 MNT3 output . l
6 LOCK 0 H when GFS is high 47 DA03 0 DAO:1 MNTZ output 7
7 NC 48 DA02 0 DA02 MNTl output .
8 vcoo o oscillation circuit output tor analog FEM PLL 49 mm o DA01 MNTO output 7 77 (
s) v001 l Oscillation circuit input for analog EFM PLL I
(8. 543mm) 50 APTR 0 control output tor aperture correction. H when itch
777E 77Tfi7j Test terminal 51 APTL 0 Control output tor aperture correct7io7n7 H when71r1if7
11 PDo o n Charge pump output tor analog EFM PLL 52 vss around if
12 vss .cround terminal 53 XTAI 1 crystal oscillation circuit input ot 16 111441le oil
3 13.15 NC ,1 :l:d.86§814§z inputr W
i 16 v1>co 0 PLL charge pu7mp output tor variable pitch 54 XTAO o Crysta7l mama circuit output7ot 16 9344117472
. l7 VCKI 1 Clock input tor uariahle pitch tron. vco 55 1 XTSL 1 Crystal selection input terminal Lwhen 7
L (16 934MHz) 16.9344MH2 H when 3:1 8688MH2 A
l 18 1 PlLo 0 Filter output lor master PLL 56 FSTT 0 2/3 divided output ol pins 5:; at 54 A
l 19 Flu I Filter input tor master PLL 57 CAM o 4 .tiMHz output . . 7'
l PCO 0 Charge pump output for master PLL 58 CltiM o 16, 9344171142 output 7
AVss Analog ground 59 mm 1 Digital output control input on at H at ()[f at L 7
CLTV I VCO conlml voltage input for master 60 DOUT 0 Dlgltal output
AVDD Analog section power supp1y(+EiV) 61 EMPH 0 Emphasis control output. Active H
RF 1 EFM signal input 62 WFCK 0 Write trame oloolt output 77 W . d
25 TESTZ 1 connect to the ground. 63 SCOR o Sulrcode detection7ou7tput, H when is detected so or
26 TESTS 1 connect to the ground. 51.
27 ASYO o EFM lull swing output 64 SBSO 0 Serial output ot sub code(P~W) 7
23 TEST4 I Connect to the ground. 65 1:ch I Clock input lor read out SBSO T
29 NC 66 SQSO 0 Sub Q 80 hits. PCM peak. and level data lti hits
30 PSSL 1 Audio data output mode changeover input. output { 77 W
Serial data at L and paraller data at H. 67 SQCK I Clock input for read out 505317777 7 J
31 WDCK o D/A intertace tor 48 hits slot. word clock Hrs 68 MUTE o Muting control output Active H.
32 LRCK o D/A intertace tor 43 hits slot. LR cloolr f:Fs. 69 SENS r Sens output. output to microprocessor
33 VDD Power supply lerminal(+5V) 7o XRST 1 System reset. Rest at low level. 7
3449 Data output terminals 70 DATA 1 Serial data input lroin microprocessor 7
PSSL=1 PSSL20 72 XLTA 1 Latch input irom microprocessor, Latch the serial
34 DAlfi 0 DA16 Serial data ot 43 bits slot data at trailing. i
35 DAls o DA15 Bit clockof 43 hits slot 73 VDD Power supply 7
36 DA14 0 DA14 serial data ot 64 hits slot 74 CLOK 1 Serial data transler clock input tron. microprocessor
37 DA13 o DA13 Bit clock oi 68 hits slot 75 SEIN l Sens input lrom SSP 7
38 DAIZ o DA12 LR clock of 68 hits slot 76 CNCI 1 Track iuinp numbers count signal input
39 DA11 o DA11 GTOP output 77 DATO 0 Serial data output to SSP
40 mm 0 DAIO XUGF output 78 XLTO 0 Serial data latch output to SSP, Latch at trailing 3
41 BAG!) 0 DA09 XPLCK output 79 CLKO 0 Serial data transter cloth output to SS? "4
so MIRR 1 Mirror signal input i

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