Pioneer VSX-D704S User manual

Service
Manual
AUDIO/VIDEO STEREO RECEIVER
VSX-D 704
VSX-79
e The al above illustration shows VSX—D704S.
( PIONEER’
The Art of Entertainment
ORDER NO.
RRV1237
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Power Reguirement
yA
VSX — D704S VSX-79
The voltage can be converted by the
following method.
With the voltage selector
CONTENTS
1. SAFETY INFORMATION EGG HOH 2 7. ADJUSTMENTS aa adm diis pha ER YR TR ak XE 60
2. EKPLODED VIEWS, PACKING AND 8. IC INFORMATION «Re 63
PARTS LIST > DEAR EN KAS E UR ERRER N KE KE NEEN NEE a AER ere 3 9. FL INFORMATION YR RR A 65
3. SCHEMATIC AND PCB CONNECTION 10. BLOCK DIAGRAM Rh 66
DIAGRAMS SEIN ENER, NANA eg, 6/502, ab KL KRILO] 11 1 1. FOR VSX—D704S/KC, SD AND
4. PCB PARTS LIST Wao S RKR A 51 VSX — 79/KU/CA EAR laa W WI ————— 69
5. DISASSEMBLY HM 58 12. PANEL FACILITIES -:-:--........................ 74
6. PCB ASSY DIAGNOSIS ---- 59 13. SPECIFICATIONS ------........................ 82

VSX-D704S, VSX-79
1. SAFETY INFORMATION
This service manual is intended for gualified service technicians; it is not meant for the casual
do-it-yourselfer. Gualified technicians have the necessary test eguipment and tools, and have been
trained to properly and safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void
the warranty. If you are not qualified to perform the repair of this product properly and safely, you
should not risk trying to do so and refer the repair to a gualified service technician.
WARNING
Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxicant which
may cause birth defects or other reproductive harm (California Health & Safety Code, Section 25249.5).
When servicing or handling circuit boards and other components which contain lead in solder, avoid unprotected skin contact with
the solder. Also, when soldering do not inhale any smoke or fumes produced.
NOTICE
(FOR CANADIAN MODEL ONLY)
Fuse symbols ME=# (fast operating fuse) and/or -ME=X (slow operating fuse) on PCB indicate that replacement parts
must be of identical designation.
REMAROUE
(POUR MODELE CANADIEN SEULEMENT)
Les symboles de fusible ME==DH (fusible de type rapide) etou WE (fusible de type lent) sur CCI indiquent que les
piéces de remplacement doivent avoir la méme désignation.
(FOR USA MODEL ONLY)
1. SAFETY PRECAUTIONS
The following check should be performed tor the
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A PO-
continued protection of the customer and service
technician.
LEAKAGE CURRENT CHECK
Measure leakage current to a known earth ground
(water pipe, conduit, etc.) by connecting a leakage
current tester such as Simpson Model 229-2 or
equivalent between the earth ground and all exposed
metal parts of the appliance (input/output terminals,
screwheads, metal overlays, control shaft, etc.). Plug
the AC line cord of the appliance directly into a 120V
AC 60 Hz outlet and turn the AC power switch on. Any
current measured must not exceed 0.5 mA.
Em S Reading should
not be above
Leakage | 0.5 mA
4 current
Device tester
under
Test all exposed
metal surfaces
Also test with plug
reversed (Using
AC adapter piug
as required)
Earth ground
AC Leakage Test
TENTIAL SHOCK HAZARD AND MUST BE COR-
RECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appli-
ance have special safety related characteristics. These
are often not evident from visual inspection nor the
protection afforded by them necessarily can be ob-
tained by using replacement components rated for
voltage, wattage , etc. Replacement parts which have
these special safety characteristics are identified in
this Service Manual.
Electrical components having such features are
identified by marking with a A on the schematics and
on the parts list in this Service Manual.
The use of a substitute replacement component which
dose not have the same safety characteristics as the
PIONEER recommended replacement one, shown in
the parts list in this Service Manual, may create shock,
fire, or other hazards.
Product Safety is continuously under review and
new instructions are issued from time to time. For
the latest information, always consult the current
PIONEER Service Manual. A subscription to, or ad-
ditional copies of, PIONEER Service Manual may be
obtained at a nominal charge from PIONEER.

| VSX-D704S, VSX-79
2. EXPLODED VIEWS, PACKING AND PARTS LIST
NOTES:
e Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.
e The A mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing,
be sure to use parts of identical designation.
€ Parts marked by “9” are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.
2.1 PACKING (for VSX — D704S/KU)
Mark No.
NSP
CSCOOND
Description Parts No.
OPERATING INSTRUCTIONS ARB7035
(English)
REMOTE CONTROL UNIT AXD7055
(CU —VSX097)
MINI REPEATER ADF1002
FM ANTENNA ADH1004
BATTERY (R6P, AA) AEX—010
LOOP ANTENNA ASSY ATB1005
MAIN REPEATER AXF1079
FRONT PAD AHA7056
REAR PAD AHA7057
PACKING CASE AHD7138
PACKING SHEET AHG1021
ATTENTION SHEET ARM7007
(READ BEFORE USING)
(English/French/Spanish/Chinese)
BATTERY COVER AZN7187
12

VSX-D704S, VSX-79
2.2 EXPLODED VIEWS (for VSX — D704S/KU)
1. EXTERIOR
Mark No. Description Parts No. Mark No. Description Parts No.
NSP 1 CHASSIS ANA7018 51 VOLUME KNOB AAB2225
2 FOOT ASSY AMR2414 52 BALANCE KNOB AAB2226
NSP 3 PCB HOLDER AEC1097 53 BADGE AAM1058
NSP 4 PCB MOLD AMR1525 54 BONNET ANE7067
5 L TYPE HOLDER ANG1903 55 SCREW FBT40P060FZK
6 SCREW ABA1009
7 POWER SUPPLY ASSY AWZ7619
8 REAR PANEL ANC7194
9 TERMINAL SCREW AKE—031
10 CONNECTION ASSY AWZ7630
NSP 11 TUNER ASSY AWE1140
12 SCREW ABA—298
13 SCREW ABA1018
14 SCREW ABA1053
15 SCREW BPZ30P060FZK
16 RIVET AMR1066
19 AUDIO FUNCTION ASSY AWZ7634
20 A/V FUNCTION ASSY AWZ7636
21 VIDEO FUNCTION ASSY AWZ7638
22 S+SR, MR, IR ASSY AWZ7645
23 CAPACITOR (C400) CKDYF102Z50
NSP 24 R.C SP. ASSY AWZ7626
NSP 25 FRONT SP. ASSY AWZ7623
| 26 PRIM ASSY AWZ7620
A 27 FUSE (10A/125V, FU1) AEK1035
28 REG. ASSY AWZ7617
A 29 STRAIN RELIEF AEP-113
A 30 AC POWER CORD ADG1146
31 65 LABEL ORW1069
A 32 POWER TRANSFORMER ATS7058
(AC120V, T1)
Sq A
34 ————-
35 e
NSP 36 TRANS ASSY AWZ7622
A 37 FUSE G.15A/125V, FU3, FU4) AEK — 124
38 YH panna
39 --——————--
40 TONE ASSY AWZ7642
41. VOLUME HOLDER ANG1902
42 VOLUME ASSY AWZ7616
43 BINDER AEP—215
44 SCREW VMZ30P060FCU
NSP 45 MOLD HOLDER ANG7021
46 BINDER AEC—093
47 _ DOL. PRO. MOD. 1020 AXQ1022
48 PCB HOLDER AEC1534
49 DISPLAY PANEL AAK7147
50 JOG DIAL AAB2224

N
-
Ki —
A
-
a o
ms
A
KU/CA
Type
Only
EA
AEC1013
Refer
to
B
“3.
POWER
AMP
SECTION”.
E
13
O
ei
8
Q
W
Sy
=
pers
Q
T
C2
(CKDYX103M25)
4
(SD
Type
Only)
C4
(CEAS100M50)
(SD
Type
Only)
C3
(CKDYX103M25)
1
SD
Type
Only
(SD
Type
Only)
C
S3
Slide
Switch
(ASH1044)
Si
|
43
SD
Type
Only
8
e
S4
Slide
Switch
2
So
8
=
(ASH1044)
|
FU2
(AEK—
126)
NS
i
C^
d
N
Ze
CH
ce
ABA—
—
SD
Type
Only
LA
Fuse
Holder
ae
VMZ26P040FZK
|
(AKR1005)
2
CS
ai
a
|
bat
AN
Q
M
13
goe?
Holder
Bracket
či
21
(
—528)
Except
KU/CA
Type12
ja
E
4
KU/CA
Type
Only
12
SD
Type
Only
>.
;
Barrier
(AEC1412)
|
25
D. Ten Type Only KOVA [For VSX—D704S)
S1 Voltage Selector
(AKX— 507) 3 z 26
B SA,
"^ so Type Only d ^ SD Type Only
| S2 Voltage Selector Sb
87 (AKX1004) 2
C1 (AEC — 507)
(SD Type Only)
12
Refer |

o ee
A
nam
a
==
4
Refer to
^3.
POWER
AMP
SECTION".
M
e
^
mre de ee e EY
B
S
4
FU2 (AEK — 126)
m m
|
|
—
ABA—298
Fuse
Holder
(AKR1005)
Fuse
Holder
Bracket
d
13
(ANG
—
528)
4
ne
Z
SD
Type
Only
N,
a
Barrier
(AEC1412)
|
3
SD
Type
Only
“SD
Type
Only
(AKX1004]
Baleet
op
NOTE
:
Screws
adjacent
to
Y
mark
on
the
product
are used for disassembly.
3
a
4
a
5
A
6
a
7
a
8
[|
9
r

VSX-D704S, VSX-79 |
2. FRONT PANEL SECTION
Mark No. Description Parts No.
1 CENTER PANEL AAK7152
2 GUI MODE BUTTON AAD4048
A 3 TX BUTTON AAD4050
4 FRONT PANEL AMB7209
5 lala Sg ie an Ei ERA
6 E NS a WA PIA
7 LED LENS PNW2019
8 ASC BUTTON AAD4049
9 MUTE BUTTON AAD4047
10 FUNCTION BUTTON AAD2470
as 11 IR FILTER AAK2575
12. POWER BUTTON AAD4052
NSP 13 SHEET AED1160
14 BUTTONB AAD2472
B
wad
C
SH
D
8
Mark No. Description
AM
AAA
——
———
m
_^_^_^__^^_^_2_______________—
———
NSP
RING
WIRE CRIP
VIDEO ASSY
HOUSING SP (J3)
SCREW
FL UCOM ASSY
FLEXIBLE FLAT CABLE (1)
FLEXIBLE FLAT CABLE (2)
ESCUTCHEON
LOGIC ASSY
PCB SPACER
AAK2586
AEC1535
AWZ7654
ADX2096
BPZ26P080FMC
AWZ7649
ADD1114
ADD1134
AAK2585
AWZ7651
BEC1049
3. POWER AMP SECTION
Mark No. Description
1
2
3. MOLDB
4 AMP ASSY C, S FAN. CN
5 AMP ASSY 200W
6 TRANSISTOR (0209)
7 TRANSISTOR (Q23)
8 THERMISTOR (TH1)
9 TRANSISTOR (03)
0 TRANSISTOR (Q210)
11 TRANSISTOR (921)
12 TRANSISTOR (Q1)
13 FAN MOTOR
14 SCREW
TRANSISTOR (Q309)
16 TRANSISTOR (Q24)
17 TRANSISTOR (Q33)
18 TRANSISTOR (034)
19 SCREW
20 TRANSISTOR (Q4)
21 TRANSISTOR (Q7)
22 TRANSISTOR (Q8)
23 TRANSISTOR (Q11)
24 TRANSISTOR (012)
25 | SCREW
PÈPÈ P PÈD Bb PÈD PS
a
26 TRANSISTOR (0310)
27 TRANSISTOR (022)
28 TRANSISTOR (031)
29 TRANSISTOR (Q32)
TRANSISTOR (Q2)
31 TRANSISTOR (05)
32 TRANSISTOR (06)
33 TRANSISTOR (09)
34 TRANSISTOR (910)
35 SCREW
PRÈP PPP
8
Parts No.
AMR7041
ANH7013
AMR7042
19
AWZ7698
AWZ7776
2SC1740S
2SA1837
150—203—73002
2SA1302
2SC1740S
2SC4793
2SC3281
AXM7005
ABA—283
2SC1740S
2SA1837
2SA1837
2SA1837
ABA—298
2SA1302
2SA1302
2SA1302
2SA1302
2SA1302
ABA1037
2SC1740S
25C4793
2SC4793
2SC4793
2SC3281
2SC3281
2SC3281
2SC3281
2SC3281
BPZ30P350FZK

3. POWER AMP SECTION
No. Mark No. Description Parts No.
386 1 MOLDA AMR7041
135 NSP 2 RADIATOR ANH7013
654 3. MOLDB AMR7042
196 4 AMP ASSY C, S FAN. CN AWZ7698
POSOFMC 5 AMP ASSY 200W AWZ7776
649 A 6 TRANSISTOR (0209) 2SC1740S
114 A 7 TRANSISTOR (Q23) 2SA1837
134 A 8 THERMISTOR (TH1) 150—203—73002
585 A 9 TRANSISTOR (Q3) 25A1302
651 A 10 TRANSISTOR (0210) 2SC1740S
149 A 11 TRANSISTOR (021) 2SC4793
A 12 TRANSISTOR (Q1) 2SC3281
A 13 FAN MOTOR AXM7005
14 SCREW ABA—283
A 15 TRANSISTOR (0309) 2SC1740S
A 16 TRANSISTOR (Q24) 2SA1837
/N 17 TRANSISTOR (033) 2SA1837
A 18 TRANSISTOR (934) 2SA1837
19 SCREW ABA—298
A 20 TRANSISTOR (Q4) 2SA1302
A 21 TRANSISTOR (Q7) 25A 1302
A 22 TRANSISTOR (Q8) 2SA1302
A 23 TRANSISTOR (Q11) 25A1302
A 24 TRANSISTOR (Q12) 2SA1302
25 SCREW ABA1037
A 26 TRANSISTOR (0310) 2SC1740S
/N 27 TRANSISTOR (922) 2SC4793
A 28 TRANSISTOR (Q31) 2SC4793
A 29 TRANSISTOR (Q32) 2SC4793
A 30 TRANSISTOR (Q2) 2SC3281
A 31 TRANSISTOR (05) 2SC3281
A 32 TRANSISTOR (Q6) 2SC3281
A 33 TRANSISTOR (Q9) 2SC3281
A 34 TRANSISTOR (910) 2SC3281
35 SCREW BPZ30P350FZK
3
35
NS

el : | 2 | 3 I 4 I 5 VSX-D704S, VSX-79
3. SCHEMATIC AND PCB CONNECTION DIAGRAMS
3.1 OVERALL SCHEMATIC DIAGRAM
PRIM
GOHz (KU,KC,KWCA TYPES)
ACTIOVIT20- 12707 A AC POWER CORD
Be
re
rag
ko
|
|
IKC,
nans
ke
2088
es
"äësege
|
ES
NOTE
FOR
SCHEMATIC
DIAGRAMS
(Type
1A)
(VSX- D704S/SD)
Lm
i
:
H
MR E E . When ordering service parts, be sure to refer to
=
go OO
a “PARTS LIST of EXPLODED VIEWS” or “PCB
PARTS LIST”.
O Ei : 2. Since these are basic circuits, some parts of them or the
9, values of some components may be changed for improve-
ment.
3. RESISTORS:
J1271 ADX7076 Unit: k:kQ, M:MQ, or Q unless otherwise noted.
; n Rated power: 1/4W, 1/6W, 1/8W, 1/10W unless otherwise
a pm) i i noted.
SCH- 4) ; gon i Tolerance: (F): 2196, (G): 2296, (K): 21096, (M): +20% or 2596 un-
a 453 i less otherwise noted.
NO 4SCC) H
us orc | 4. CAPACITORS:
; prež P ; Unit: p:pF or uF unless otherwise noted. s
a a t i 3, 4 i Ratings: capacitor (uF)/ voltage (V) unless otherwise noted.
EN i d TEE i NEN i Rated voltage: 50V except for electrolytic capacitors.
; : : ! o) ; 5. COILS:
: | i 2 : i i Unit: m:mH or pH unless otherwise noted.
d i si Siw. ani COM 6. VOLTAGE AND CURRENT:
E : E i TM : Signal voltage at rated output.
;
;
l
X
Jor-Vv:
i | DC voltage (V) at no input signal unless otherwise noted.
i Hg i Value in( ) is DC voltage at rated power.
J1272 ADX7077 CONNECTION ass, : A € mA or mA:
K
DC
current
at
no
input
signal
unless
otherwise
noted.
E
Ji
7. OTHERS:
* Q or Q : Adjusting point.
: Measurement point.
e The Á mark found on some component parts indicates the im-
portance of the safety factor of the parts. Therefore, when re-
placing, be sure to use parts of identical designation.
8. SCH—O ON THE SCHEMATIC DIAGRAM:
e SCH—D indicates the drawing number of the schematic dia-
gram. (SCH stands for schematic diagram.)
9. SWITCHES (Underline indicates switch position):
` FL UCOM assy 1
S701 VCR2
S702 POWER STANDBY/ON
S703 MUTING
S704 VIDEO
$705 RETURN
S706 GUI MODE
S707 TV/SAT
S708 SPEAKERS A
S709 GUI ENTER
$710 RESET
S711 LO
S712 SPEAKERS E (
S713 SELECT
S714 TAPE1
S716 ENTER
S717 TAPE2 MONITOR
~ $719 MEMORY
$720 PHONO
$722 MPX MODE
$723 TUNER
$724 SLEEP (VSX- D704S TYPE)
MULTI- ROOM & SOURCE
(VSX- 79 TYPE)
$725 FM/AM
$726 CD
S727 SUPER BASS (VSX- D704S TYPE)
THEATER BASS (VSX- 79 TYPE)
$728 DOLBY 3CH LOGIC
$729 DIRECT (VSX- D704S TYPE)
PURE LINE (VSX- 79 TYPE)
S730 VCR1
S731 DSP MODE
S732 DOLBY PRO- LOGIC |
S1281 CENTER SPEAKER SELECTOR
I-I (VSX- 79 TYPE ONLY)
J200____ ADX2047
` J119 — ADX2097-
S+SR, MR, IR
(AWZ7645 : a
FU2 AEK-126
>
=
EA
: i S an
i TO
H p OX
! VOLTAGE SELECTOR S1
¿ARO 507
AKP1099
IJ
'ORMER T1
ATS7058 : KU, KC, KU/CA TYPES er
—... nan
TRANS assy
(AWZ7622)
(“SCH- 10)
eeooooooeoooeoo
- m
> >
tan le
ME d BEE
CBR ACBL «Y
TE des S0
DAA ET :
H
J28 450
FUS.FU4
AEK-124
JIS 200
7
U
3137 450
REG.
(AWZ7617 : VSX- D704S)
(AWZ7618 : VSX- 79)
(*>SCH- 8)
J701
ADX2099
FL UCOM
n D704S)
AWZ7650 : VSX- 79)
PHOTO DIODE assy (+SCH- 11)
SCH= 1 pear SCH-— 1
OVERALL SCHEMATIC DIAGRAM OVERALL SCHEMATIC DIAGRAM 12
—
1
|
2
|
3
|
4
1
5
l
6
|

VSX-D704S,
VSX-79
$
|
S
3.2
AUDIO
FUNCTION
ASSY
AND
A/V
FUNCTION
ASSY
A
E
AUDIO FUNCTION ASSY (AWZ7634: VSX—D704S) SCH-2
REC - O R402 1C403 : BUFFER (AWZ7635: VSN 79)
TAPE2 S : SIGNAL ROUTE .
par
(0
BH
Yi
n>
¿AUDIO
SIGNAL
ROUTE
(PHONO)
3
;
A>
AUDIO
SIGNAL
ROUTE
(LD)
A
>
REC.
:
3
;
ae
:AUDIO
SIGNAL
ROUTE
(MR
OUT)
S
nee
3
|
eru
SIGNAL
ROUTE
Z
PLAY
O
“>
AM
SIGNAL
ROUTE
EX 2
2 + o
LG 50 2
+
UD
mq
a
o
o 2 4 PHONO 10402 : AUDIO REC SELECTOR ©) TR +
4:22
S
ESC
ur
io
EI
T
Z
z
—T
|.
o
jseg
Hola
||
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toto
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ntu
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5 eil Di o
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s
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3 2 ET E
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v o a € -iə JO
èg Eg MA -
co
o
o
a NANNE u
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a |n AA
a
,
J8
z
Y
9
2
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9
B
Z
t
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o
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.
|
o KI
[EA UM C40!
d
CE
EE
S
CEN
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10403 : BUFFER 2-27
AXT1084
— — 0090000600666
s a m
2 - Z - Z z mu Z w
n, eee ee ee
ai 3 «a AX ae - «n «ax «a
se — — oeeoooooooon ==
Db a E ee
- A/V FUNCTION ASSY (AWZ7636: VSX—D704S) SU. ms
REG
(AWZ7637:
VSX—79)
tein
pese
[Str]
VCR
2
SS
PLAY
b
1M)
o
MR
L
JN
o
[ REC eo | "c i
ev
el
MR
MUTE
4
Lew,
ONI
RY
ery
BEEF
DE
a
5
C is Ene de aeta E
R IE A
Tv Qi nv 518
BREET ua EEES
A o IS E
BEE JIE
© $T2 3 ul
=
aoe,
NE
dae EN =| 8
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.
jo
ili
WEEK
o
e. c m ke
oz
2
09
w z
mns 2% :
St
o
=
TV "au OUT R
LD
;
E
OUT
L
PLAY $
s 1C451 : V- AUDIO INPUT
D VCR 1 RED 3 SELECTOR
| PLAY 2
VCR 2 z
REC e
Mi E rat aaae O OS Y LS AE CET SAK ON 2 AREA AD PER — Lo PE EO Anita —
SCH
—
2
|
audio
FUNCTION
assy,
NOTE
;
Sections
marked
mih
Mare
not
used
auio
Function
assy,
SCH
—
2
43
A/V
FUNCTION
ASSY
`
A/V
FUNCTION
ASSY
1
1
I
2
[|
3
|
4
I
5
1
6