Pioneer VSX-26-TX, VSX-24-TX, VSX-27-TX, VSX-29-TX, VSXD-908-S Service manual
Type
Model
Power Requirement Remarks
VSX-29TX VSX-27TX VSX-26TX VSX-24TX VSX-D908S
KU/CA AC120V
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
AUDIO/VIDEO MULTI-CHANNEL RECEIVER
STANDBY/ON
N∫m¿</ım
DSP
STEREO
STANDBY
MODE
/DTS
THX CINEMA ADVANCED STANDARD CONTROL
VIDEO VCR 1 VCR 2 DVD/LD TV/SAT CD MD/TAPE1 TUNER PHONO
REFERENCE AUDIO/VIDEO MULTI–CHANNEL RECEIVER
MULTI-ROOM
& SOURCE
AUDIO/VIDEO MULTI-CHANNEL RECEIVER
VSX-29TX
VSX-27TX
VSX-26TX
VSX-24TX
MIN MAX
INPUT
SELECTOR
MASTER
VOLUME
ORDER NO.
RRV2133
VSX-D908S
CONTENTS
1. SAFETY INFORMATION
2. EXPLODED VIEWS AND PARTS LIST
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
4. PCB CONNECTION DIAGRAM
5. PCB PARTS LIST
6. ADJUSTMENT
...............................................
....................................................
......................................
...............
...
.........................
2
3
10
48
71
83
7. GENERAL INFORMATION
7.1 DISASSEMBLY
7.2 PARTS
7.2.1 IC
7.2.2 DISPLAY
7.3 REMOTE CONTROL UNIT
8. PANEL FACILITIES AND SPECIFICATIONS
..........................................................
............................................................
............................................
.................................................
................................
..........................
.....
84
84
86
86
90
92
103
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
c
PIONEER ELECTRONIC CORPORATION 1999
T – IZK MAY 1999 Printed in Japan
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
1. SAFETY INFORMATION
This service manual is intended for qualified service technicians ; it is not meant for the casual do-ityourselfer. Qualified technicians have the necessary test equipment 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 qualified service technician.
WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause
cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 – Proposition 65
NOTICE
(FOR CANADIAN MODEL ONLY)
Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement parts must
be of identical designation.
REMARQUE
(POUR MODÈLE CANADIEN SEULEMENT)
Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que les pièces
de remplacement doivent avoir la même désignation.
(FOR USA MODEL ONLY)
1. SAFETY PRECAUTIONS
The following check should be performed for the
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 60Hz outlet and turn the AC power switch
on. Any current measured must not exceed 0.5mA.
Reading should
not be above
0.5mA
Earth
ground
Device
under
test
Also test with
plug reversed
(Using AC adapter
plug as required)
Leakage
current
tester
Test all
exposed metal
surfaces
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
RETURNING THE APPLIANCE TO THE CUSTOMER.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appliance
have special safety related characteristics. These are
often not evident from visual inspection nor the protection
afforded by them necessarily can be obtained 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
in this Service Manual.
The use of a substitute replacement component which does
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 additional copies of, PIONEER
Service Manual may be obtained at a nominal charge from
PIONEER.
on the schematics and on the parts list
AC Leakage Test
2
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
2. EXPLODED VIEWS AND PARTS LIST
NOTES:• Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.
The 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.
Screws adjacent to mark on the product are used for disassembly.
•
2.1 PACKING
11
1
2
3, 12
13
10
7 (2/2)
7 (1/2)
VSX-29TX Other Models
Refer to
"7.3 REMOTE
CONTROL UNIT".
13
5
4
5
8
10
1
2
11
3, 12
7 (1/2)
Refer to
"7.3 REMOTE
CONTROL UNIT".
7 (2/2)
13
6
13
4
8
5
9
9
(1) PACKING PARTS LIST
Mark No. Description Part No.
1 AM Loop Antenna ATB7009
2 FM Wire Antenna ADH1015
3 Operating Instructions See Contrast table (2)
(English)
4 Remote Control Unit See Contrast table (2)
NSP 5 Alkaline Dry Cell Battery VEM1012
(LR6, AA)
6 Cushion for Remote See Contrast table (2)
(for Remote Control Unit)
7 Front Pad See Contrast table (2)
Mark No. Description Part No.
8 Rear Pad See Contrast table (2)
9 Packing Case See Contrast table (2)
10 Packing Sheet RHC1023
11 Polyethylene Bag Z21-038
(0.03×230×340)
NSP 12 Warranty Card See Contrast table (2)
13 Spacer See Contrast table (2)
(2) CONTRAST TABLE
VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX and VSX-D908S are constructed the same except for the following :
Mark No. Symbol and Description
3
Operating Instructions (English)
4
Remote Control Unit (CU-VSX158)
4
Remote Control Unit (CU-VSX159)
4
Remote Control Unit (CU-VSX161)
6
Cushion for Remote
7
Front Pad 29
7
Front Pad 26
8
Rear Pad 29
8
Rear Pad 26
9
Packing Case 29TX
9
Packing Case 27TX
9
Packing Case 26TX
9
Packing Case 24TX
9
NSP
Packing Case 908S
12
Warranty Card EL
12
Warranty Card PA
13
Spacer 29
13
Spacer 26
VSX-29TX VSX-27TX VSX-26TX VSX-24TX VSX-D908S
ARB7188
AXD7216
Not used
Not used
AXG7080
AHA7255
Not used
AHA7256
Not used
AHD7810
Not used
Not used
Not used
Not used
ARY1026
Not used
AHB7033
Not used
ARB7186
Not used
AXD7212
Not used
Not used
Not used
AHA7253
Not used
AHA7254
Not used
AHD7783
Not used
Not used
Not used
ARY1026
Not used
Not used
AHB7032
Part No.
ARB7186
Not used
AXD7212
Not used
Not used
Not used
AHA7253
Not used
AHA7254
Not used
Not used
AHD7811
Not used
Not used
ARY1026
Not used
Not used
AHB7032
ARB7186
Not used
AXD7212
Not used
Not used
Not used
AHA7253
Not used
AHA7254
Not used
Not used
Not used
AHD7784
Not used
ARY1026
Not used
Not used
AHB7032
ARB7193
Not used
Not used
AXD7213
Not used
Not used
AHA7253
Not used
AHA7254
Not used
Not used
Not used
Not used
AHD7785
Not used
ARY7023
Not used
AHB7032
Remaks
3
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
2.2 EXTERIOR
VSX-29TX Only
75
56
74
73
27
67
67
67
VSX-29TX, VSX-27TX Only
66 (VSX-29TX)
67 (VSX-27TX)
26
73
(Except
VSX-29TX)
10
11
71
Refer to
"2.4 FRONT PANEL SECTION".
58
67
67
VSX-29TX
Only
48
60
72
66 (VSX-29TX)
67 (OTHERS)
66 (VSX-29TX)
67 (OTHERS)
49
VSX-29TX Only
57
26
(VSX-26TX,
VSX-24TX,
VSX-D908S Only)
66 (VSX-29TX)
67 (OTHERS)
66
(VSX-29TX)
67
(VSX-27TX)
17
28
P
1 or 2
5
20
63
33
74
75
54
O
13
J
I
66 (VSX-29TX)
67 (OTHERS)
68
51
16
69
G
32
8
12
J
31
65
K
30
H
22
VSX-29TX,
VSX-27TX
Only)
Refer to
"2.3 HEAT SINK SECTION".
55
70
35
I
H
4
3
P
K
9
52
52
64
51
42
67
67
38
67
66
(VSX-29TX)
70
L
67
(OTHERS)
G
B
70
51
70
39
44
29
A
E
N
18
66 (VSX-29TX)
67 (OTHERS)
6
73
(Except
VSX-29TX)
21
71
M
67
23
15
37
62
M
O
24
N
25
43
70
43
L
69
53
67
7
52
F
E
50
45
67
66 (VSX-29TX)
67 (OTHERS)
44
42
66 (VSX-29TX)
14
67 (OTHERS)
36
19
66 (VSX-29TX)
67 (OTHERS)
59
66 (VSX-29TX)
67 (OTHERS)
F
49
40
49
VSX-29TX
Only
50
72
34
66 (VSX-29TX)
67 (OTHERS)
61
C
VSX-29TX,
VSX-27TX
67
Only
4
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
(1) EXTERIOR PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
NSP 1 EXTRA-5.1 Assy See Contrast table (2)
NSP 2 EXTERNAL IN Assy See Contrast table (2)
NSP 3 A-PINJACK Assy See Contrast table (2)
4 CONNECTION Assy AWX7313
5 MAIN CONTROL Assy See Contrast table (2)
6 TRANS 2-1 ASSY AWX7326
7 DIODE Assy AWX7343
8 SP/PS Assy See Contrast table (2)
9 REGULATOR Assy AWX7310
10 TRANS 1 Assy AWX7316
11 TRANS 2-2 Assy AWX7366
12 VIDEO Assy See Contrast table (2)
13 S-VIDEO Assy See Contrast table (2)
14 VOLUME Assy See Contrast table (2)
15 PRIMARY Assy AWX7311
16 DIGITAL-I/O Assy See Contrast table (2)
NSP 17 RF TERMINAL Assy See Contrast table (2)
NSP 18 DSP Assy See Contrast table (2)
19 V-AMP Assy See Contrast table (2)
20 AC Power Cord See Contrast table (2)
21 Power Transformer (T1) ATS7252
22 FM/AM TUNER Unit AXX7046
23 Fuse (FU1 : 10A) VEK1029
24 Fuse (FU4 : 2.5A) REK1079
25 Fuse (FU5 : 2.5A) REK1079
26 AC Cord Spacer See Contrast table (2)
27 Bonnet Case See Contrast table (2)
28 2P Shield with Housing (J24) See Contrast table (2)
29 Lead Card 07P (J13) ADD7161
30 Lead Card 11P AD (J22) ADD7170
36 Lead Card 28P (J23) ADD7171
37 Assy Holder See Contrast table (2)
38 Assy Holder B AMR7267
39 Card Spacer AEC7133
40 Card Spacer DEC1772
41 • • • • •
42 Cushion 55 PNM1316
NSP 43 Frame See Contrast table (2)
44 Insulator PNW2766
45 Locking Card Spacer DEC1908
46 • • • • •
47 • • • • •
NSP 48 Panel Stay See Contrast table (2)
49 PC Support VEC1549
NSP 50 PCB Holder AEC7057
NSP 51 PCB Holder PNW2100
NSP 52 PCB Mould AMR1525
53 PCB Spacer AEC1372
54 Rear Panel See Contrast table (2)
55 Shield Case See Contrast table (2)
56 Side Board 29 L See Contrast table (2)
57 Side Board 29 R See Contrast table (2)
58 Side Escutheon L See Contrast table (2)
59 Side Escutheon R See Contrast table (2)
60 Side Sash L 29 See Contrast table (2)
61 Side Sash R 29 See Contrast table (2)
62 Stud Cover AEC7105
63 Terminal Screw AKE-031
NSP 64 Under Base 29 See Contrast table (2)
NSP 65 Binder (BK-1) ZCA-BK1
31 Lead Card 13P AD (J16) ADD7169
32 Lead Card 14P (J17) ADD7165
33 Lead Card 21P (J18) ADD7164
34 Lead Card 23P BD SLD (J12) ADD7160
35 Lead Card 26P (J15) ADD7163
66 Screw BBT30P080FCC
67 Screw BBZ30P080FZK
68 Screw ABA1193
69 Screw IBZ30P080FCC
70 Screw BBZ30P180FMC
71 Screw See Contrast table (2)
72 Screw BBT30P040FZK
73 Screw FBT40P080FZK
74 Wood Collar See Contrast table (2)
75 Screw See Contrast table (2)
5
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
(2) CONTRAST TABLE
VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX and VSX-D908S are constructed the same except for the following :
Mark No. Symbol and Description
NSP
1
NSP
NSP
EXTRA-5.1 Assy
2
EXTERNAL IN Assy
3
A-PINJACK Assy
5
MAIN CONTROL Assy
8
SP/PS Assy
VSX-29TX VSX-27TX VSX-26TX VSX-24TX VSX-D908S
AWX7314
Not used
AWX7312
AWX7306
AWX7272
Not used
AWX7398
AWX7397
AWX7393
AWX7272
Part No.
Not used
AWX7398
AWX7397
AWX7399
AWX7433
Not used
AWX7398
AWX7401
AWX7406
AWX7433
Not used
AWX7398
AWX7397
AWX7424
AWX7433
Remaks
NSP
NSP
NSP
NSP
NSP
NSP
12
VIDEO Assy
13
S-VIDEO Assy
14
VOLUME Assy
16
DIGITAL-I/O Assy
17
RF TERMINAL Assy
18
DSP Assy
19
V-AMP Assy
20
AC Power Cord
26
AC Cord Spacer
26
Cord Stopper
27
Bonnet Case 29
27
Bonnet Case 26
28
2P Shield with Housing (J24)
37
Assy Holder
43
Frame 29
43
Frame 26
48
Panel Stay 29
48
Panel Stay 26
54
Rear Panel 29
54
Rear Panel 27
54
Rear Panel 26
54
Rear Panel 24
54
Rear Panel D908S
55
Shield Case 29
55
Shield Case 26
56
Side Board 29 L
57
Side Board 29 R
58
Side Escutheon L 29
58
Side Escutheon L 26
59
Side Escutheon R 29
AWX7307
AWX7308
AWX7367
AWX7315
AWX7376
AWX7272
AWX7309
ADG7028
ANG1153
Not used
AZN7790
Not used
ADX7250
ANG7139
ANG7243
Not used
AND7032
Not used
ANC7738
Not used
Not used
Not used
Not used
ANK7055
Not used
AMS7013
AMS7014
AAK7635
Not used
AAK7636
AWX7394
AWX7395
AWX7367
AWX7396
AWX7376
AWX7272
AWX7309
ADG7028
ANG1153
Not used
Not used
AZN7789
ADX7250
ANG7121
Not used
ANG7238
Not used
AND7031
Not used
ANC7737
Not used
Not used
Not used
Not used
ANK7054
Not used
Not used
Not used
AAK7633
Not used
AWX7394
AWX7395
Not used
AWX7396
Not used
AWX7433
AWX7309
ADG7024
Not used
CM-22C
Not used
AZN7789
Not used
ANG7121
Not used
ANG7238
Not used
AND7031
Not used
Not used
ANC7736
Not used
Not used
Not used
ANK7054
Not used
Not used
Not used
AAK7633
Not used
AWX7407
AWX7395
Not used
AWX7396
Not used
AWX7433
AWX7409
ADG7024
Not used
CM-22C
Not used
AZN7789
Not used
ANG7121
Not used
ANG7238
Not used
AND7031
Not used
Not used
Not used
ANC7847
Not used
Not used
ANK7054
Not used
Not used
Not used
AAK7633
Not used
AWX7394
AWX7395
Not used
AWX7396
Not used
AWX7433
AWX7409
ADG7024
Not used
CM-22C
Not used
AZN7789
Not used
ANG7121
Not used
ANG7238
Not used
AND7031
Not used
Not used
Not used
Not used
ANC7848
Not used
ANK7054
Not used
Not used
Not used
AAK7633
Not used
6
NSP
NSP
59
Side Escutheon R 26
60
Side Sash L 29
61
Side Sash R 29
64
Under Base 29
64
Under Base 26
71
Screw
74
Wood Collar
75
Screw
Not used
AAH7019
AAH7020
ANA7091
Not used
ABA1015
AEC1165
ABA1086
AAK7634
Not used
Not used
Not used
ANA7089
ABA1015
Not used
Not used
AAK7634
Not used
Not used
Not used
ANA7089
ABA1015
Not used
Not used
AAK7634
Not used
Not used
Not used
ANA7089
ABA1015
Not used
Not used
AAK7634
Not used
Not used
Not used
ANA7089
ABA1053
Not used
Not used
2.3 HEAT SINK SECTION
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
10
13
9
12
13
4
3
1
14
13
2
14
11
13
7
13
6
5
13
11
13
13
9
15
8
13
10
12
(1) HEAT SINK SECTION PARTS LIST
Mark No. Description Part No.
NSP 2 C-AMP-P Assy AWX7317
NSP 3 OUTPUT-SL Assy AWX7322
NSP 4 OUTPUT-FL Assy AWX7319
NSP 6 OUTPUT-FR Assy AWX7320
NSP 7 OUTPUT-SR Assy AWX7323
NSP 9 Heat Sink See Contrast table (2)
NSP 12 Power Supply Plate ANG7240
1 C-AMP N Assy AWX7318
5 OUTPUT-C Assy AWX7321
8 VL-TERMINAL Assy AWX7324
10 Heat Sink Holder A AMR7255
11 Heat Sink Holder B AMR7256
13 Screw BBZ30P080FZK
14 Screw ABA1082
15 Screw IBZ30P080FCC
(2) CONTRAST TABLE
VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX and VSX-D908S are constructed the same except for the following :
Mark No. Symbol and Description
NSP
9
NSP
Heat Sink D10
9
Heat Sink 26
VSX-29TX VSX-27TX VSX-26TX VSX-24TX VSX-D908S
ANH7103
Not used
ANH7103
Not used
Part No.
Not used
ANH7102
Not used
ANH7102
Not used
ANH7102
Remaks
7
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
2.4 FRONT PANEL SECTION
35
VSX-29TX,
VSX-27TX
Only
35
40
C
35
27
VSX-29TX,
VSX-27TX
Only
12
13
26
34
24
1034
11
24
31
23
34
34
5
8
28
VSX-29TX,
VSX-27TX Only
30
2223
33
4
6
9
7
8
8
37
39
36
1
19
32
2
29
14
Cut
(Except VSX-24TX)
38
21
D
20
16
18
B
3
32
17
D
15
Except
VSX-24TX
35
40
35
A
25
8
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
(1) FRONT PANEL SECTION PARTS LIST
Mark No. Description Part No. Mark No. Description Part No.
1 H. PHONE/F. VIDEO Assy AWX7342
2 DISPLAY Assy See Contrast table (2)
NSP 3 ROTARY ENCODER Assy See Contrast table (2)
4 Door Hinge 26 L AMR7252
5 Door Hinge 26 R AMR7253
NSP 6 Magnet Angle ANG7241
7 Door Panel See Contrast table (2)
NSP 8 Spacer VEC-244
NSP 9 Door Plate 26 AAH7024
10 Door Sheet See Contrast table (2)
11 Display Panel 26 AAK7625
12 Function Lens 27 See Contrast table (2)
13 Power Button (STANDBY/ON) AAD7440
14 MR Button 26 (MULTIROOM) See Contrast table (2)
15 Lead Card 32P (J11) ADD7159
16 Lead Card 05P (J14) ADD7162
17 Lead Card 06P (J20) ADD7167
18 Lead Card 08P (J19) See Contrast table (2)
19 Lead Card 12P (J21) ADD7166
20 Damper Assy (60) AXA7078
NSP 37 Cord with Plug ADH7020
21 Sub Panel See Contrast table (2)
22 Volume Ring See Contrast table (2)
23 Nut NK90FUC
24 Door Cusion B AEB7152
25 Front Panel See Contrast table (2)
26 LED Lens PNW2019
27 Name Plate B PAN1376
28 Ring Spacer D5 See Contrast table (2)
29 FL Sheet 26 AAK7627
30 Volume Knob See Contrast table (2)
(MASTER VOLUME)
31 Rotary Knob See Contrast table (2)
(INPUT SELECTOR)
32 Screw ABA7053
33 Screw PBA1096
34 Screw BPZ30P060FMC
35 Screw BPZ30P080FMC
36 Screw BBZ30P080FZK
38 Panel Base See Contrast table (2)
39 Magnet AMF7002
40 Cord Clamper RNH-184
(2) CONTRAST TABLE
VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX and VSX-D908S are constructed the same except for the following :
Mark No. Symbol and Description
2
NSP
DISPLAY Assy
3
ROTARY ENCODER Assy
7
Door Panel 26
7
Door Panel 24
7
Door Panel 908
10
Door Sheet 26
10
Door Sheet 98SD
10
Door Sheet 98CC
12
Function Lens 27
14
MR Button
18
Lead Card 08P (J19)
21
Sub Panel 29
21
Sub Panel 26
21
Sub Panel 908
22
Volume Ring D10
22
Volume Ring 26
25
Front Panel 29
25
Front Panel 27
25
Front Panel 26
25
Front Panel 24
25
Front Panel 98CC
28
Ring Spacer D5
30
Volume Knob 27
30
Volume Knob 26
31
Rotary Knob 27
31
Rotary Knob 26
38
Panel Base 27
38
Panel Base 26
VSX-29TX VSX-27TX VSX-26TX VSX-24TX VSX-D908S
AWX7327
AWX7328
AMB7574
Not used
Not used
AAK7626
Not used
Not used
AAK7628
AAD7514
ADD7168
AMB7622
Not used
Not used
AAH7016
Not used
AMB7566
Not used
Not used
Not used
Not used
AWL7038
AAB7194
Not used
AAB7197
Not used
AMB7570
Not used
AWX7327
AWX7328
AMB7574
Not used
Not used
AAK7626
Not used
Not used
AAK7628
AAD7514
ADD7168
AMB7622
Not used
Not used
Not used
AAK7623
Not used
AMB7567
Not used
Not used
Not used
AWL7038
AAB7194
Not used
AAB7197
Not used
AMB7570
Not used
Part No.
AWX7404
AWX7405
AMB7574
Not used
Not used
AAK7626
Not used
Not used
Not used
AAD7514
Not used
Not used
AMB7575
Not used
Not used
AAK7623
Not used
Not used
AMB7568
Not used
Not used
Not used
Not used
AAB7193
Not used
AAB7196
Not used
AMB7569
AWX7408
AWX7405
Not used
AMB7633
Not used
Not used
AAK7677
Not used
Not used
Not used
Not used
Not used
AMB7575
Not used
Not used
AAK7623
Not used
Not used
Not used
AMB7613
Not used
Not used
Not used
AAB7193
Not used
AAB7196
Not used
AMB7569
AWX7427
AWX7405
Not used
Not used
AMB7624
Not used
Not used
AAK7674
Not used
AAD7514
Not used
Not used
Not used
AMB7617
Not used
AAK7623
Not used
Not used
Not used
Not used
AMB7623
Not used
Not used
AAB7193
Not used
AAB7196
Not used
AMB7569
Remaks
9
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM
UNIT
AXX7046
8
CN902
D
IC101 IC102
15 3 1
IC103
CN104
16
1
CN9801
59
IC9151
Y
IC9201
IC9202
IC9101
IC9071
IC9203
16
9
IC9321
26
IC9411 IC9421 IC9401
B
B
R
B
14
11
CN7201
16
17
18
1
CN1001
CN1001
4
3
6
3
CN1001
CN1352
CN906
C
4
4
IC351
C
2
C
IC9601
CN9801
12
10
4
2
8
6
W
X
R
VSX-29TX, VSX-27TX,
VSX-26TX, VSX-24TX
Q113
CN1201
CN1250
2
3
5
7
9
11
2
A
CN7201
5
10
VSX-29TX, VSX-27TX, VSX-26TX
VSX-24TX
CN701
4
IC731
19
75
1
IC109
3
5
7
9
11
CN9803
CN9804
2
5, 8
4, 3
1, 2
CN1101
3
7
5
9
13
11
15
1312
IC701
1
13
14
12
IC701
C
4, 1
5, 6
7, 8
CN1301
1
15
2
IC751
P
IC1301
IC1303
IC1302
CN1302
9, 8
7, 2
3, 4
IC701
CN702
2
1315
3
10
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
IC105
5, 7
31
Q271
13, 15
9, 11
CN104
CN103
2, 3
4, 9
25
26
27
7, 11
6, 10
18
19
IC104
D
9, 12
OTHERS
IC108
25
IC107
IC107
IC107
8, 2
CN109
7
14
8
2
16
26
5
7, 10
19
6, 9
20
IC112
6, 4
IC114
4
IC113
IC115
24
17
E
CN501
10
Q510
16
Q550
8
Q610
IC7501, IC7502
+3.5 ~ +8.5dB
(Normally :
+8.5dB)
31
IC7541, IC7542
+3.5 ~ +8.5dB
(Normally :
+8.5dB)
31
IC7601, IC7602
+3.5 ~ +8.5dB
(Normally :
+8.5dB)
31
Q107
Q108
Q111
Q112
8, 10
CN502
13, 15
3, 4
Q109
Q110
CN2001
HB
21, 19 Y9
R2512
Q2501
Q2524
F
G
HC
16, 14
Q2541
R2552
Q2544
HA
26, 24
Q2601
R2612
Q2504
Y11
Y12
CN3003
RY3105
RY3101
RY3103
RY3104
RY3102
CN7201
39
R
JA7201
8, 7
CN804
2
3
IC851
15
14
13
12
2
7
Q
13
14
12
IC852
5
3
IC852
4
2
15
1
IC852
1
IC801
1
IC802
5
9
13
3
7
5
9
13
3
11
15
11
15
3
IC801
CN804
6
6
7
7
CN7201
R
11
1
23
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.2 OVERALL WIRING CONNECTION DIAGRAM
ROTARY ENCODER ASSY
(VSX-29TX, VSX-27TX : AWX7328)
T
A
(VSX-26TX, VSX-24TX, VSX-D908S : AWX7405)
DISPLAY ASSY
ADD7167
S
(VSX-29TX, VSX-27TX : AWX7327)
(VSX-26TX : AWX7404) (VSX-24TX : AWX7408)
(VSX-D908S : AWX7427)
ADD7168
4
U
VOLUME ASSY
(AWX7367)
VSX-29TX, VSX-27TX
ONLY
B
ADD7161
1/5- 5/5
ADD7162
ADD7159
ADD7160
Y Y
Y
DSP ASSY
(VSX-29TX, VSX-27TX : AWX7272)
(VSX-26TX, VSX-24TX, VSX-D908S : AWX7433)
C
E
E E
1/2, 2/2
V-AMP ASSY
(VSX-29TX, VSX-27TX, VSX-26TX : AWX7309)
(VSX-24TX, VSX-D908S : AWX7409)
OUTPUT-SR
ASSY
HE
(AWX7323)
OUTPUT-FR
ASSY
HD
(AWX7320)
OUTPUT-C
ASSY
HC
(AWX7321)
OUTPUT-FL
ASSY
C-AMP-P ASSY
(AWX7317)
G
HB
HA
I
(AWX7319)
OUTPUT-SL
ASSY
(AWX7322)
VL-TERMINAL
ASSY
(AWX7324)
REGULATOR ASSY
M
1/3- 3/3
(AWX7310)
D D
ADD7170
D
MAIN CONTROL ASSY
(VSX-29TX : AWX7306)(VSX-24TX : AWX7406)
(VSX-27TX : AWX7393)(VSX-D908S : AWX7424)
(VSX-26TX : AWX7399)
VSX-29TX, VSX-27TX
ONLY
CONNECTION ASSY
C
(AWX7313)
ADD7169
D
RF TERMINAL
ASSY
(AWX7376)
X
FM/AM TUNER UNIT
(AXX7046)
EXTRA-5.1 ASSY (VSX-29TX : AWX7314)
A
EXTERNAL IN ASSY (OTHERS : AWX7398)
12
W
DIGITAL-I/O ASSY
(VSX-29TX : AWX7315)
(OTHERS : AWX7396)
1234
ADD7163
P
VIDEO ASSY
(VSX-29TX : AWX7307)
A-PINJACK ASSY (VSX-29TX : AWX7312)
(VSX-27TX, VSX-26TX, VSX-D908S : AWX7397)
B
(VSX-24TX : AWX7401)
ADD7164
(VSX-27TX, VSX-26TX, VSX-D908S
: AWX7394)
(VSX-24TX : AWX7407)
5
678
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and P AR TS LIST" or "PCB PARTS LIST".
• CAUTION : Heatsink's DC level is equal to +B or -B.
ADD7166
Don't touch them or you will be electricary shocked.
R
H. PHONE/F. VIDEO ASSY
(AWX7342)
A
ADD7171
C-AMP-N ASSY
(AWX7318)
F
O
TRANS 2-2 ASSY
(AWX7366)
T1
POWER TRANSFORMER
(ATS7252)
DIODE ASSY
(AWX7343)
K
J
N
TRANS 1 ASSY
(AWX7316)
B
TRANS 2-1 ASSY
(AWX7326)
C
V
PRIMARY ASSY
ADD7165
(AWX7311)
L
SP/PS ASSY
(VSX-29TX, VSX-27TX
: AWX7402)
(VSX-26TX, VSX-24TX,
Q
S-VIDEO ASSY
(VSX-29TX : AWX7308)
(OTHERS : AWX7395)
5
VSX-D908S : AWX7325)
6
13
7
8
D
1
23
4
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.3 EXTRA-5.1 (EXTERNAL IN), A-PINJACK and CONNECTION ASSYS
A
A
EXTRA-5.1 ASSY
CN1101
(VSX-29TX : AWX7314)
EXTERNAL IN ASSY
(OTHERS : AWX7398)
JA1101-JA1103 ;
VSX-29TX : AKB7121
OTHERS : AKB7095
B
LD LD
A-PINJACK ASSY
B
(VSX-29TX : AWX7312)
(VSX-27TX, VSX-26TX,
VSX-D908S : AWX7397)
TV TV
LD
(VSX-24TX : AWX7401)
CN1014: AKB7108
(VSX-29TX ONLY)
JA1014: AKB7050
(VSX-24TX ONLY)
JA1015: AKB7048
JA1016: AKB7120
(VSX-27TX, VSX-26TX,
VSX-D908S ONLY)
V1V1
MD
CN1001
JA1011-JA1013 ;
VSX-29TX : AKB7108
OTHERS : AKB7048
C
D
V2
MD
PP
V2
V1
LD
TV
CN1002
P
14
A B
1234
C
CN1301
5
678
CONNECTION ASSY (AWX7313)
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
CN1302
CN103
1/3
D
A
B
CN1351
MD
V2
V1
TV
CN1352
CN1353
P
LD
TV
V2
V1
MD
CN101
1/3
D
C
LD
PP
P
PP
LD
: AUDIO SIGNAL ROUTE (LD)
TV
: AUDIO SIGNAL ROUTE (TV)
V1
: AUDIO SIGNAL ROUTE (VCR1)
V2
: AUDIO SIGNAL ROUTE (VCR2)
MD
: AUDIO SIGNAL ROUTE (MD)
P
: AUDIO SIGNAL ROUTE (PHONO)
D
C
5
6
7
8
15
1
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.4 MAIN CONTROL ASSY (1/3)
: The power supply is shown with the marked box.
A
CN906
52045-0545
S
B
CN7005
23
2/3
D
TU
D
2/3
4
TV
1SS355
1SS355
LD
P
TU
T2
CD
T2
TU
VSX-24TX
ONLY
MR
MR
2/3
D
VSX-24TX
VSX-27TX, VSX-26TX,
VSX-D908S
VSX-29TX
T2
JA901 (1/2)
CN941 (1/2)CN941 (2/2)
CD
JA911JA931
C
JA901 (2/2) JA911 (1/2)JA911 (2/2)
MR
CN911 (2/2) CN941 (2/2) CN911 (1/2) CN941 (1/2)
CD
MR MR
TU
T2
V2
V1
MD
VSX-29TX
JA901 : AKB7075
JA911 : AKB7075
VSX-27TX, VSX-26TX, VSX-D908S
CN941 : AKB7075
D
JA911 : DKB1045
JA931 : VKB1060
VSX-24TX
CN941 : AKB7015
CN911 : AKB7015
16
D
CN101
1/3
1234
P
LD
V1
TV
V2
MD
C
CN1353
MR
5
678
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
D
1/3
MAIN CONTROL ASSY
(VSX-29TX : AWX7306)(VSX-24TX : AWX7406)
(VSX-27TX : AWX7393)(VSX-D908S : AWX7424)
(VSX-26TX : AWX7399)
: AUDIO SIGNAL ROUTE
LD
: AUDIO SIGNAL ROUTE (LD)
TV
: AUDIO SIGNAL ROUTE (TV)
V1
: AUDIO SIGNAL ROUTE (VCR1)
V2
: AUDIO SIGNAL ROUTE (VCR2)
MD
: AUDIO SIGNAL ROUTE (MD)
P
: AUDIO SIGNAL ROUTE (PHONO)
TU
: AUDIO SIGNAL ROUTE (TUNER)
CD
: AUDIO SIGNAL ROUTE (CD)
T2
: AUDIO SIGNAL ROUTE (TAPE2)
MR
: AUDIO SIGNAL ROUTE (MR)
A
B
VSX-24TX
ONLY
EXCEPT
VSX-24TX
MR
VSX-24TX
ONLY
MR
MR
MR
VSX-24TX
ONLY
MR
CN104
1/2
C
2/2
D
CN103
M
CN5004
5
6
7
C
CN1302
D
1/3
8
17
1
23
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.5 MAIN CONTROL ASSY (2/3)
4
D
A
1/3
D
B
MAIN CONTROL ASSY
2/3
(VSX-29TX : AWX7306)(VSX-24TX : AWX7406)
(VSX-27TX : AWX7393)(VSX-D908S : AWX7424)
(VSX-26TX : AWX7399)
D
3/3
C
1/3
D
D
18
2/3
D
1234
5
678
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
: The power supply is shown with the marked box.
: AUDIO SIGNAL ROUTE
D
3/3
E
CN501
A
B
1/2
CN105
C
103 or 113 (2/3)
103 or 113 (1/3)
103 or 113 (3/3)
Q107 - Q112 :
HN1C03F
1/3
D
5
6
7
VSX-29TX
103 : AKB7088
OTHERS
113 : AKB7089
2/3
D
8
D
19
1
23
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
4
3.6 MAIN CONTROL ASSY (3/3)
A
To
B
CN902
TU
FM/AM TUNER UNIT
TU
TU
1SS355
D905-D908
1SS355
CN903
Y
CN9551
4/5
1SS355
C
2/3
D
D901-D904
1SS355
D
20
3/3
D
1234
CN901
M
CN5005
M
CN5008
CN920
5
678
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
D
3/3
MAIN CONTROL ASSY
(VSX-29TX : AWX7306)
(VSX-24TX : AWX7406)
(VSX-27TX : AWX7393)
(VSX-D908S : AWX7424)
(VSX-26TX : AWX7399)
: The power supply is shown with the marked box.
TU
S
CN7001
: AUDIO SIGNAL ROUTE (TUNER)
CN904
A
B
∗1
∗1
R921 :
VSX-26TX, VSX-D908S ONLY
R922 :
VSX-29TX, VSX-27TX, VSX-24TX
ONLY
R923 :
VSX-27TX, VSX-D908S ONLY
R924 :
VSX-29TX, VSX-26TX, VSX-24TX
ONLY
R925 :
VSX-29TX, VSX-D908S ONLY
R926 :
VSX-27TX, VSX-26TX, VSX-24TX
ONLY
CN905
C
CN108
5
M
CN5003
P
CN701
3/3
D
6
7
8
21
D
1
23
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.7 V-AMP ASSY (1/2)
4
A
E
V-AMP ASSY
1/2
(VSX-29TX, VSX-27TX, VSX-26TX : AWX7309)
(VSX-24TX, VSX-D908S : AWX7409)
IC7601 (1/2)
UPC4570G2
∗
IC7501 (1/2)
UPC4570G2
B
∗
CN501
E
2/2
IC7541 (1/2)
UPC4570G2
2/3
D
CN105
∗
C
IC7521 (1/2)
UPC4570G2
E
2/2
∗
∗
VSX-29TX
VSX-27TX
VSX-26TX
R7504
R7524
R7544
R7604
R7624
D
10kΩ
VSX-24TX
VSX-D908S
0Ω
505, 506
VEF1040
IC7621 (1/2)
UPC4570G2
22
∗
1/2
E
1234
5
678
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
A
VSX-29TX, VSX-27TX, VSX-26TX
ONLY
VSX-29TX, VSX-27TX, VSX-26TX
ONLY
VSX-29TX, VSX-27TX, VSX-26TX
ONLY
IC7601 (2/2)
UPC4570G2
IC7501 (2/2)
UPC4570G2
: AUDIO SIGNAL ROUTE
B
VSX-29TX, VSX-27TX, VSX-26TX
ONLY
VSX-29TX, VSX-27TX, VSX-26TX
ONLY
IC7541 (2/2)
UPC4570G2
IC7521 (2/2)
UPC4570G2
IC7621 (2/2)
UPC4570G2
E
2/2
C
D
1/2
E
5
6
7
8
23
1
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.8 V-AMP ASSY (2/2)
A
B
23
4
CN504
1/2
E
1/2
E
C
1/2
E
D
1/2
E
24
2/2
E
1234
5
678
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
A
E
V-AMP ASSY
2/2
(VSX-29TX, VSX-27TX, VSX-26TX : AWX7309)
(VSX-24TX, VSX-D908S : AWX7409)
: AUDIO SIGNAL ROUTE
CN502
B
E
1/2
E
1/2
F
CN2001
C
D
2/2
E
5
6
7
8
25
1
23
4
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.9 C-AMP-N, C-AMP-P, OUTPUT-SL, OUTPUT-FL, OUTPUT-C, OUTPUT-FR,
OUTPUT-SR and VL-TERMINAL ASSYS
A
F
C-AMP-N ASSY
(AWX7318)
2SC1740C
2SA970
B
2/2
E
CN502
CN2001
C
CN2601
2SA970
CN2501
L L
CN2602
CN2603
HA
OUTPUT-SL ASSY
(AWX7322)
CN2502
CN2503
HB
OUTPUT-FL ASSY
(AWX7319)
G
C-AMP-P ASSY
(AWX7317)
D
26
F G
1234
HA HB
CN2604
CN2504
5
678
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
2SA970
2SA970
: AUDIO SIGNAL ROUTE
2SA970
A
B
CN2542
CN2543
CN2544
CN2541 CN2521
L
CN2522
CN2523
HC
OUTPUT-C ASSY
(AWX7321)
CN2524
HD
OUTPUT-FR ASSY
(AWX7320)
I
CN2621
L
CN2622
CN2623
HE
OUTPUT-SR ASSY
(AWX7323)
CN2624
VL-TERMINAL ASSY (AWX7324)
C
L
L
D
GF
5
6
HC HD HE
7
8
I
27
1
23
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.10 TRANS 2-1, DIODE and SP/PS ASSYS
4
A
HE
I I
DIODE ASSY
J
TRANS 2-1 ASSY
(AWX7326)
B
FU4, FU5 : 2.5A
REK1079
K
(AWX7343)
4001
3001
VSX-26TX
VSX-24TX
VSX-D908S
VSX-29TX
VSX-27TX
POWER TRANSFORMER
C
• NOTE FOR FUSE REPLACEMENT
CAUTION -
CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE ONLY WITH SAME TYPE NO. 49102.5 MFD, BY
LITTELFUSE INC. FOR IC4501, IC4502 (AEK7014).
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE WITH SAME TYPE AND RATINGS ONLY.
V
CN6003
CN3001
SP/PS ASSY
D
L
(VSX-29TX, VSX-27TX : AWX7402)
(VSX-26TX, VSX-24TX, VSX-D908S : AWX7325)
28
J K L
1234
5
678
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
HA HE
A
I
CN3101
VSX-26TX
VSX-24TX
VSX-D908S
VSX-29TX
VSX-27TX
CN3102
3004
B
C
M
CN5001
M
CN5002
D
CN3003
L
5
6
7
8
29
1
23
VSX-29TX, VSX-27TX, VSX-26TX,
VSX-24TX, VSX-D908S
3.11 REGULATOR, TRANS 1 and TRANS 2-2 ASSYS
REGULATOR ASSY (AWX7310)
A
M
CN5001
52147-0810
L
3004
CN5002
4
B
CN3003
D5010
1SS133
L
MTZJ10CMTZJ5.1B
C
N
TRANS 1 ASSY
(AWX7316)
5501
V
5009
O
D
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POWER TRANSFORMER
TRANS 2-2 ASSY
(AWX7366)
CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE ONLY WITH SAME TYPE NO. 491.200 MFD, BY
LITTELFUSE INC. FOR IC5009, IC5010 (AEK7023).
CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE.
REPLACE ONLY WITH SAME TYPE NO. 491004 MFD, BY
LITTELFUSE INC. FOR IC5501 (AEK7018).
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