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ORDER NO.
RRV4298
DJM-850-K
DJ MIXER
DJM-850-K
DJM-850-S
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Type Power Requirement Remarks
DJM-850-K, DJM-850-S SYXJ8 AC 220 V to 240 V
DJM-850-K, DJM-850-S UXJCB AC 120 V
DJM-850-K, DJM-850-S LXJ AC 110 V to 120 V or 220 V to 240 V
DJM-850-K, DJM-850-S KXJ5 AC 220 V
DJM-850-K, DJM-850-S XJCN5 AC 220 V to 240 V
PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan
PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
K-MZV MAR. 2012 Printed in Japan
1 2 3 4
SAFETY INFORMATION
A
This service manual is intended for qualified service technicians; it is not meant for the casual do-it-
yourselfer. 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
B This product may contain a chemical known to the State of California to cause cancer, or birth defects or other reproductive
harm.
Health & Safety Code Section 25249.6 - Proposition 65
(FOR USA MODEL ONLY)
ANY MEASUREMENTS NOT WITHIN THE LIMITS
1. SAFETY PRECAUTIONS
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
The following check should be performed for the
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
continued protection of the customer and service
RETURNING THE APPLIANCE TO THE CUSTOMER.
technician.
C LEAKAGE CURRENT CHECK
Measure leakage current to a known earth ground 2. PRODUCT SAFETY NOTICE
(water pipe, conduit, etc.) by connecting a leakage Many electrical and mechanical parts in the appliance
current tester such as Simpson Model 229-2 or have special safety related characteristics. These are
equivalent between the earth ground and all exposed often not evident from visual inspection nor the protection
metal parts of the appliance (input/output terminals, afforded by them necessarily can be obtained by using
screwheads, metal overlays, control shaft, etc.). Plug replacement components rated for voltage, wattage, etc.
the AC line cord of the appliance directly into a 120 V Replacement parts which have these special safety
AC 60 Hz outlet and turn the AC power switch on. Any characteristics are identified in this Service Manual.
current measured must not exceed 0.5 mA. Electrical components having such features are
identified by marking with a > on the schematics and on
D
the parts list in this Service Manual.
Reading should The use of a substitute replacement component which
Leakage not be above does not have the same safety characteristics as the
Device current 0.5 mA
under tester PIONEER recommended replacement one, shown in the
test parts list in this Service Manual, may create shock, fire,
Test all or other hazards.
exposed metal
surfaces 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
Also test with Manual. A subscription to, or additional copies of,
plug reversed Earth PIONEER Service Manual may be obtained at a nominal
E (Using AC adapter ground
plug as required) charge from PIONEER.
AC Leakage Test
F
2 DJM-850-K
1 2 3 4
5 6 7 8
CONTENTS
SAFETY INFORMATION.......................................................................................................................................................... 2
1. SERVICE PRECAUTIONS .................................................................................................................................................... 5
1.1 NOTES ON SOLDERING ............................................................................................................................................... 5 A
1.2 NOTES ON REPLACING ............................................................................................................................................... 5
1.3 NOTES ON SERVICING................................................................................................................................................. 5
2. SPECIFICATIONS................................................................................................................................................................. 6
3. BASIC ITEMS FOR SERVICE .............................................................................................................................................. 7
3.1 CHECK POINTS AFTER SERVICING ........................................................................................................................... 7
3.2 JIGS LIST ....................................................................................................................................................................... 7
3.3 PCB LOCATIONS ........................................................................................................................................................... 8
4. BLOCK DIAGRAM .............................................................................................................................................................. 10
4.1 OVERALL WIRING DIAGRAM ..................................................................................................................................... 10
4.2 AUDIO SYSTEM BLOCK DIAGRAM ............................................................................................................................ 12
4.3 DSP BLOCK DIAGRAM................................................................................................................................................ 14
4.4 POWER BLOCK DIAGRAM ......................................................................................................................................... 16 B
5. DIAGNOSIS ........................................................................................................................................................................ 18
5.1 POWER ON SEQUENCE............................................................................................................................................. 18
5.2 TROUBLESHOOTING.................................................................................................................................................. 20
5.3 POWER SUPPLY DIAGNOSIS INFORMATION ........................................................................................................... 31
5.4 VOLTAGE MONITORING CIRCUIT .............................................................................................................................. 32
5.5 ABOUT POLYSWITCH ................................................................................................................................................. 34
5.6 ABOUT PROTECTOR .................................................................................................................................................. 35
5.7 V+34D DIAGNOSIS...................................................................................................................................................... 36
5.8 ERROR INDICATIONS ................................................................................................................................................. 37
5.9 CONNECTION CHECK WITH EACH INTERFACE ...................................................................................................... 38
5.10 HOW TO CONFIRM THE DVS SIGNAL ROUTE ....................................................................................................... 39
C
5.11 IC INFORMATION ...................................................................................................................................................... 43
6. SERVICE MODE ................................................................................................................................................................. 56
6.1 TEST MODE................................................................................................................................................................. 56
6.2 ABOUT THE DEVICE................................................................................................................................................... 71
7. DISASSEMBLY ................................................................................................................................................................... 72
8. EACH SETTING AND ADJUSTMENT ................................................................................................................................ 84
8.1 NECESSARY ITEMS TO BE NOTED........................................................................................................................... 84
8.2 UPDATING OF THE FIRMWARE ................................................................................................................................. 84
8.3 USER SETABLE ITEMS ............................................................................................................................................... 87
8.4 SHEET FOR CONFIRMATION OF THE USER SETTING ........................................................................................... 87
9. EXPLODED VIEWS AND PARTS LIST............................................................................................................................... 88
9.1 PACKING SECTION ..................................................................................................................................................... 88 D
9.2 EXTERIOR SECION..................................................................................................................................................... 90
9.3 BOTTOM SECTION...................................................................................................................................................... 92
9.4 CONTROL PANEL SECTION (1/2)............................................................................................................................... 94
9.5 CONTROL PANEL SECTION (2/2)............................................................................................................................... 96
10. SCHEMATIC DIAGRAM .................................................................................................................................................... 98
10.1 INPUT ASSY (1/5) ...................................................................................................................................................... 98
10.2 INPUT ASSY (2/5) .................................................................................................................................................... 100
10.3 INPUT ASSY (3/5) .................................................................................................................................................... 102
10.4 INPUT ASSY (4/5) .................................................................................................................................................... 104
10.5 INPUT ASSY (5/5) .................................................................................................................................................... 106
10.6 MIC1 and MTRM ASSYS ......................................................................................................................................... 108
10.7 MAIN ASSY (1/19).................................................................................................................................................... 110 E
10.8 MAIN ASSY (2/19).................................................................................................................................................... 112
10.9 MAIN ASSY (3/19).................................................................................................................................................... 114
10.10 MAIN ASSY (4/19).................................................................................................................................................. 116
10.11 MAIN ASSY (5/19).................................................................................................................................................. 118
10.12 MAIN ASSY (6/19).................................................................................................................................................. 120
10.13 MAIN ASSY (7/19).................................................................................................................................................. 122
10.14 MAIN ASSY (8/19).................................................................................................................................................. 124
10.15 MAIN ASSY (9/19).................................................................................................................................................. 126
10.16 MAIN ASSY (10/19)................................................................................................................................................ 128
F
DJM-850-K 3
5 6 7 8
1 2 3 4
10.17 MAIN ASSY (11/19) ................................................................................................................................................130
10.18 MAIN ASSY (12/19) ................................................................................................................................................132
A 10.19 MAIN ASSY (13/19) ................................................................................................................................................134
10.20 MAIN ASSY (14/19) ................................................................................................................................................136
10.21 MAIN ASSY (15/19) ................................................................................................................................................138
10.22 MAIN ASSY (16/19) ................................................................................................................................................140
10.23 MAIN ASSY (17/19) ................................................................................................................................................142
10.24 MAIN ASSY (18/19) ................................................................................................................................................144
10.25 MAIN ASSY (19/19) ................................................................................................................................................146
10.26 SEC/HP ASSY (1/2)................................................................................................................................................148
10.27 SEC/HP ASSY (2/2)................................................................................................................................................150
10.28 USBI and HPJK ASSYS..........................................................................................................................................152
10.29 PNLA ASSY (1/2)....................................................................................................................................................154
10.30 PNLA ASSY (2/2)....................................................................................................................................................156
B
10.31 PNLB and FADC ASSYS ........................................................................................................................................158
10.32 FAD1 to FAD4 ASSYS ............................................................................................................................................160
10.33 REG ASSY..............................................................................................................................................................161
10.34 TRANS, PRIMARY and ACSW ASSYS ..................................................................................................................162
10.35 WAVEFORMS .........................................................................................................................................................164
11. PCB CONNECTION DIAGRAM ......................................................................................................................................168
11.1 INPUT, MIC1 and MTRM ASSYS .............................................................................................................................168
11.2 MAIN ASSY...............................................................................................................................................................172
11.3 SEC/HP, USBI and HPJK ASSYS.............................................................................................................................178
11.4 PNLA ASSY ..............................................................................................................................................................182
11.5 PNLB and FADC ASSYS ..........................................................................................................................................186
C 11.6 FAD1 to FAD4 and REG ASSYS...............................................................................................................................190
11.7 TRANS, PRIMARY and ACSW ASSYS ....................................................................................................................192
12. PCB PARTS LIST ............................................................................................................................................................196
D
E
F
4 DJM-850-K
1 2 3 4
5 6 7 8
1. SERVICE PRECAUTIONS
1.1 NOTES ON SOLDERING