Pioneer VSX-D938TX User manual

ORDER NO.
PIONEER 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
PIONEER CORPORATION 1999
RRV2189
T – ZZK AUG. 1999 Printed in Japan
CONTENTS
1. CONTRAST OF MISCELLANEOUS PARTS........2
2. PCB CONNECTION DIAGRAM............................5
3. SCHEMATIC DIAGRAM .......................................6
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
AUDIO/VIDEO MULTI-CHANNEL RECEIVER
VSX-D938TX
Type Model Power Requirement The voltage can be converted by
VSX-D938TX the following method.
HL ‡AC220-230V AC240V, ∗
LB ‡AC110V –––––––
∗:Alter the wiring of the Power-supply block at the primary winding of Power-transformer referring to the "Line Voltage Selection" described
in Service Manual.
Model No. Order No. Remarks
VSX-908RDS-G/HY RRV2166
¶This service manual should be used together with the following manual(s):

VSX-D938TX
2
1. CONTRAST OF MISCELLANEOUS PARTS
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 product are used for disassembly.
Reference Nos. indicate the pages and Nos. in the service manual for the base model.
NOTES:
When ordering resistors, first convert resistance values into code form as shown in the following examples.
Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%,
and K=10%).
Ex.2 When there are 3 effective digits (such as in high precision metal film resistors).
561
473
R50
1R0
5621
560
47k
0.5
1
RD1/4PU J
RD1/4PU J
RN2H K
RS1P K
56 x 101
47 x103
R50
1R0
561
473
5.62k RN1/4PC F562 x 1015621
CONTRAST TABLE
Part No.
Ref. No. Mark Symbol and Description VSX-908RDS-G VSX-D938TX VSX-D938TX Remarks
/HY /HL /LB
ASSEMBLIES
NSP MAIN ASSY AWK7528 AWK7561 AWK7542
P5- 5 MAIN CONTROLASSY AWX7410 AWX7465 AWX7428
NSP POWER/CURRENTASSY AWK7510 AWK7510 AWK7548
P5- 7 DIODE ASSY AWX7469 AWX7469 AWX7343
P5- 8 SP/PS ASSY AWX7359 AWX7359 AWX7449
P7- 8 VL-TERMINALASSY AWX7511 AWX7511 AWX7324
NSP COMPLEX ASSY AWK7529 AWK7529 AWK7543
P5-10 TRANS 1 ASSY AWX7316 AWX7316 Not used
P5-10 TRANS 1/LB ASSY Not used Not used AWX7447
P5-15 PRIMARYASSY AWX7345 AWX7345 AWX7429
NSP FRONT/VAMP ASSY AWK7530 AWK7544 AWK7544
P8- 2 DISPLAY ASSY AWX7414 AWX7408 AWX7408
PACKING SECTION
P3- 2 FM Wire Antenna ADH7010 ADH7010 ADH7011
P3- 3 Operating Instructions (English) ARB7187 ARE7213 ARE7213
P3- 9 Packing Case AHD7815 AHD7818 AHD7818
P3-12 NSP Warranty Card ARY7022 Not used Not used
P3-14 Operating Instructions (German) ARC7244 Not used Not used
P3-15 Operating Instructions (French) ARC7245 Not used Not used
P3-16 Operating Instructions (Italian) ARC7246 Not used Not used
P3-17 Operating Instructions (Dutch) ARC7270 Not used Not used
P3-18 Operating Instructions (Swedish) ARC7280 Not used Not used
P3-19 Operating Instructions (Spanish) ARC7281 Not used Not used
P3-20 Operating Instructions (Portuguese) ARC7282 Not used Not used
Operating Instructions (Chinese) Not used ARC7286 ARC7286
EXTERIOR SECTION
P5-20 AC Power Cord ADG7029 VDG1063 ADG7023
P5-21 Power Transformer (T1) ATS7253 ATS7253 Not used
(AC220-230V/240V)
P5-21 Power Transformer (T1) (AC110V) Not used Not used ATS7255
P5-22 FM/AM TUNER Unit AXX7048 AXX7048 AXX7047
P5-23 Fuse (FU1 : T4A) AEK-514 AEK-514 Not used
P5-23 Fuse (FU1 : 10A) Not used Not used DEK1045
P5-26 AC Cord Spacer ANG1153 ANG7281 Not used
P5-26 Cord Stopper Not used CM-22B CM-22C
P5-27 Bonnet Case AZN7809 AZN7809 AZN7794
P5-54 Rear Panel ANC7866 ANC7816 ANC7817
VSX-D938TX/HL, LB and VSX-908RDS-G/HY are constructed the same except for the following :

VSX-D938TX
3
Notes : For ASSEMBLIES, refer to “CONTRAST OF PCB ASSEMBLIES”, “2. PCB CONNECTION DIAGRAM” and “3. SCHEMATIC
DIAGRAM”.
Part No.
Ref. No. Mark Symbol and Description VSX-908RDS-G VSX-D938TX VSX-D938TX Remarks
/HY /HL /LB
P5-72 Screw BBT30P100FCC BBT30P100FZK BBT30P100FZK
P5-75 Screw IBZ30P100FCC IBZ30P100FCC Not used
P5-78 AC Socket 3P AKP-502 AKP-502 Not used
P5-79 Caution Label ARW7036 ARW7036 Not used
P5-80 Fuse Holder Not used VKR1003 Not used
P5-81 Fuse (T5A) Not used PEK1003 Not used
P5-82 Fan Motor AXM7012 AXM7012 Not used
HEAT SINK SECTION
P7- 9 NSP Heat Sink ANH7102 ANH7103 ANH7102
P7-16 Thermistor AEX7004 AEX7004 Not used
FRONT PANEL SECTION
P8-10 Door Sheet AAH7057 AAH7054 AAH7054
P8-14 MR Button AAD7575 Not used Not used
P8-25 Front Panel ANB7176 ANB7196 ANB7196
CONTRAST OF PCB ASSEMBLIES
AWX7465, AWX7428 andAWX7410 are constructed the same except for the following :
MAIN CONTROL ASSY
F
D
Mark Symbol and Description Part No. Remarks
AWX7410 AWX7465 AWX7428
Q992 2SC2412K Not used Not used
C995 CKSQYB103K50 Not used Not used
R921 RS1/10S103J Not used Not used
R922 Not used RS1/10S103J RS1/10S103J
R923 Not used Not used RS1/10S103J
R924 RS1/10S103J RS1/10S103J Not used
R925 Not used RS1/10S103J Not used
R926 RS1/10S103J Not used RS1/10S103J
R992 RS1/10S221J Not used Not used
R993 RS1/10S101J Not used Not used
R994 RS1/10S472J Not used Not used
AWX7324 and AWX7511 are constructed the same except for the following :
VL-TERMINAL ASSY
F
I
Mark Symbol and Description Part No. Remarks
AWX7511 AWX7324
C2011, C2012 CEAT4R7M2A CEAT1R0M2A
AWX7343 and AWX7469 are constructed the same except for the following :
DIODE ASSY
F
K
Mark Symbol and Description Part No. Remarks
AWX7469 AWX7343
D3001, D3002 LN6SB60-4003 D5SBA20(B)

VSX-D938TX
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AWX7408 and AWX7414 are constructed the same except for the following :
DISPLAY ASSY
F
S
AWX7449 and AWX7359 are constructed the same except for the following :
SP/PS ASSY
F
L
Mark Symbol and Description Part No. Remarks
AWX7359 AWX7449
IC3001 AEK7007 Not used
Q3501, Q3502 DTA124ES Not used
Q3503 2SC4793 Not used
Q3504 2SC2235 Not used
D3501, D3502 S5688G Not used
D3505 MTZJ27D Not used
D3506, D3508 MTZJ12C Not used
D3507 MTZJ5.1B Not used
L3001, L3002 ATX1012 Not used
C3118 CEAT470M50 CEAT100M50
C3501 CEAT471M35 Not used
C3502 CEAT1R0M50 Not used
C3503 CKCYF103Z50 Not used
C3504 CEAT471M25 Not used
R3501 RD1/4PU471J Not used
R3502 RD1/4PU473J Not used
R3503 RD1/4PU102J Not used
R3504 RD1/4PU104J Not used
R3505 RS3LMF221J Not used
R3506 RD1/4PU222J Not used
R3507 RD1/4PU103J Not used
CN3002 KM250MA3 Not used
Mark Symbol and Description Part No. Remarks
AWX7414 AWX7408
IC7401 BU1923 Not used
Q7002 DTC124EK Not used
Q7401 2SA1993 Not used
Q7402 DTC143ES Not used
Q7403 2SC1740S Not used
D7002 SLR-343VR Not used
L7401 LFA2R2J Not used
S7019, S7020 VSG1009 Not used
C7401 CKSQYB472K50 Not used
C7402 CEAT2R2M50 Not used
C7403, C7404 CKSQYB102K50 Not used
C7405 CEAT101M10 Not used
C7406, C7407 CCSQCH270J50 Not used
C7408 CKSQYB561K50 Not used
C7409 CEAT1R0M50 Not used
R7038 RS1/10S271J Not used
R7062 RS1/10S0R0J Not used
R7401, S7407, S7408 RS1/10S102J Not used
R7403 RS1/10S222J Not used
R7404 RS1/10S473J Not used
R7405 RS1/10S333J Not used
R7406 RS1/10S104J Not used
X7401 CRYSTAL RESONATOR (4.332MHz) ASS7004 Not used

VSX-D938TX
5
A
B
C
D
1234
1234
F
N
2. PCB CONNECTION DIAGRAM
2.1 TRANS 1/LB ASSY
F
TRANS 1/LB ASSY
(LB Type Only)
N
SIDE A
(ANP7308-D)
J6601 : DB112EB0
J6602 : DB412EB0
0V
0V
110V 120V 10V 120V
Y6001
V
T1
POWER
TRANSFORMER
Y6002
V
AWX7429 and AWX7345 are constructed the same except for the following :
PRIMARY ASSY
F
V
TRANS 1/LB Assy has no service parts.
TRANS 1/LB ASSY
F
N
Mark Symbol and Description Part No. Remarks
AWX7345 AWX7429
C6002, C6003 (10000pF/AC250V) ACE7014 ACG7020
C6006 CEAT221M25 CEAT470M25
L6003, L6004 ATX1012 Not used
RY6001 POWER RELAY ASR1044 ASR7022
T6001 STANDBY TRANS. ATT7040 ATT7041
R6002 RD1/4PU1R0J Not used
Y6003 ADX7321 Not used
Y6004 ADX7320 Not used
Y6005 ADX7319 Not used
6004 3PAC OUTLET Not used AKP1053

VSX-D938TX
6
A
B
C
D
1234
1234
3. SCHEMATIC DIAGRAM
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST"
3.1 MAIN CONTROL, PRIMARY and TRANS 1/LB ASSYS
3/3F
D
R923 :
LB TYPE ONLY
R924 :
HL TYPE ONLY
R925 :
HL TYPE ONLY
R926 :
LB TYPE ONLY
∗1
∗1
3/3F
MAIN CONTROL ASSY
(HL TYPE : AWX7465)
(LB TYPE : AWX7428)
D
1SS133
DTC143ES
ACG7020
ACG7020
ADX7279
ADX7280
TRANS 1/LB ASSY
(AWX7447)
F
N
PRIMARY ASSY
(LB Type Only : AWX7429)
F
V
F
V
F
N