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Onkyo HT-R940 Service Manual
Onkyo HT-R940 Service Manual

Onkyo HT-R940 Service Manual

Av receiver
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SERVICE MANUAL
SERVICE MANUAL
AV RECEIVER
MODEL
STANDBY/ON
STANDBY
MULTI CH
DVD
VIDEO
1
VIDEO
2
VIDEO
VCR
PHONES
SPEAKERS
A
B
TONE
Black and Silver models
B MDC
120V AC, 60Hz
S MPP
230-240V AC, 50Hz
SAFETY-RELATED COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
HT-R940
TUNING
PRESET
ENTER
3
TAPE
TUNER
C D
RETURN
SETUP
DIGITAL
TUNING
THX
LISTENING MODE
DISPLAY
INPUT
DIMMER
MEMORY
MODE
CLEAR
ON THE
HT-R940
Ref. No. 3960
062006
ON/STANDBY
REMOTE MODE
RECEIVER
DVD
TAPE
INPUT SELECTOR
M D/CDR
C D
1
2
3
HDD
V 1
V 2
V 3
4
5
6
TV
MULTI CH
DVD
7
8
9
VCR
TAPE
TUNER
C D
CABLE
10
11
12
+10
0
CLR
SAT
D TUN
ENT
--/---
DIMMER
SLEEP
CH
T V
VOL
VOL
DISC
ALBUM
INPUT
MASTER VOLUME
GUIDE
PREVIOUS
TOP MENU
MENU
SP A / B
MUTING
ENTER
PLAYLIST/CAT
PLAYLIST/CAT
RETURN
SETUP
LISTENING MODE
STEREO
SURROUND
3 INPUT
VIDEO
AUDIO
SUBTITLE
RANDOM
REPEAT
VIDEO
L
AUDIO
R
TEST TONE
CH SEL
LEVEL-
LEVEL+
PLAY MODE
DISPLAY
L NIGHT
Re-EQ
VCR
DVD
HDD
RC- 650 M
RC-650M

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Summary of Contents for Onkyo HT-R940

  • Page 1 COMPONENTS IDENTIFIED BY MARK 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 PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURRENT OR RESISTANCE...
  • Page 2: Exploded Views

    HT-R940 EXPLODED VIEWS-1 P901 A102 P101 P6601A x 14 pcs. PP Only A037 A109 DC Only A069 Refer to A022 "EXPLODED VIEWS-2" A060 F6902 A027 A048 A024 F6901 A062 x 3 pcs. A061 A093 x 6 pcs. A029 A018 F901...
  • Page 3 HT-R940 EXPLODED VIEWS-2 Q6050B x 6 pcs. A049 x 14 pcs. Q6056 Q6066 Q6055 Q6065 Q6054 Q6064 Q6053 Q6063 Q6052 Q6062 Q6051 Q6050A Q6061 x 2 pcs. Q6050 Q6060...
  • Page 4 HT-R940 BLOCK DIAGRAMS-1 AUDIO SECTION TUNER UNIT XM DIGITAL TRANSCEIVER ANTENNA UNIT XMDT IC F2602E-01 AK4384 CD IN TAPE OUT TAPE IN VIDEO 3 IN VIDEO 2 IN VIDEO 1 OUT VIDEO 1 IN FRONT CENTER SUBWOOFER SURROUND SURROUND BACK...
  • Page 5 HT-R940 R2S15211FP 8ch ELECTRONIC VOLUME / 11 INPUT SELECTOR / PHONES TONE CONTROL POWER AMPLIFIER TONE +29dB LEFT FRONT A SPEAKERS +29dB TONE RIGHT +29dB CENTER +29dB LEFT SURROUND SPEAKERS +29dB RIGHT +29dB LEFT SURROUND BACK SPEAKERS +29dB RIGHT LEFT...
  • Page 6: Block Diagrams

    HT-R940 BLOCK DIAGRAMS-2 VIDEO SECTION COMPONENT VIDEO AN-15881AN VT VIDEO SWITCH COMPONENT VIDEO ADV7183A ADV7172 DIGITAL VIDEO DECODER DIGITAL VIDEO ENCODER DACA -6dB 1k AIN1 DACB -6dB 1k DACC AIN2 COMPOSITE / Y2 -6dB 1k AIN3 COMPOSITE DACD -6dB 1k...
  • Page 7 HT-R940 SCHEMATIC DIAGRAMS-1 To NADG-8808 To NADG-8808 AUDIO INPUT SECTION To NADG-8808 To NADG-8809 (SD-2 : A4) (SD-2 : A4) P303 P302 (SD-2 : A3) (SD-6 : E1) P304 JL5502A P5505 P7900 R5500 R5575 R5501 220K R5576 R5541 C5501 220K...
  • Page 8 HT-R940 P301 NAAF-8779 (1/2) AMPLIFIER PC BOARD VOLH To NAAF-8779 (2/2) SEC1H (SD-2 : A3) PROTECT -11.9V R5680 220K R5681 220K R5682 220K Q5600 - 5607 : RN1441 -12V R6227 Q5630A J5062 R5630 C6227 47/50 NJM4580 2SB1068-U P6221 C5600 104Z...
  • Page 9 HT-R940 SCHEMATIC DIAGRAMS-2 POWER AMPLIFIER SECTION +60.2V R5180 +1.1V R6020 Q6030 (1/4W) 2SC5171 + 50.5V +1.0V (1/4W) Q5030 2SA949Y (1/4 +0.6V <Note> NC = No mount of parts. R5030 SD = SCHEMATIC DIAGRAMS 120K -0.3V R5000 C5010 47/50 R5020 -0.65V...
  • Page 10 HT-R940 P6902B P6901B +60.5V +60.2V (1/4W) +60.5V R5183 +1.1V R6023 Q6033 2SC5171 C5171 IPRO IPRO R6080 + 50.5V R6083 (1/4W) +1.0V Q6053 0.22 Q5033 0.22 Q6050 (1/4W) (1/4W) 2SC5242 2SA949Y +0.6V 2SC5242 R6140 R6143 Q6070 Q6073 2SC2240 2SC2240 R5033 -0.3V...
  • Page 11 HT-R940 To NAVD-8811 To NAVD-8811 To NAETC-8781 SCHEMATIC DIAGRAMS-3 To TUNER UNIT (SD-4 : E1) (SD-5 : G1) (SD-2 : A4) P101A P2005A P2004A P2006A JL703B DSP & MICROPROCESSOR SECTION To NADIS-8785 (SD-7 : H1) P701A C103 100/16 R110 R108...
  • Page 12 HT-R940 8781 NADG-8808 Refer to following table about the parts displayed by mark " ". 703B R770 R771 R772 R773 R780 R781 R782 R783 None 4.7k None DSP & MICROPROCESSOR None None PC BOARD Q752 RN2402 RN2402 D711 Q703 R752 2.2K...
  • Page 13 HT-R940 SCHEMATIC DIAGRAMS-4 VIDEO SECTION NAVD-8811 (1/2) VIDEO & SPEAKER TERMINAL PC BOARD <Note> NC = No mount of parts. SD = SCHEMATIC DIAGRAMS P4001 C4001 PRIN3 10/50 C4002 PBIN3 C4135 10/50 104Z R4133 C4003 CYIN3 10/50 R4135 C4019 C4103 102K 220/6.3...
  • Page 14 HT-R940 To NADG-8808 To NADG-8808 (SD-3 : C1) (SD-3 : D1) P2004B P2006B GND_VD To NAVD-8811(2/2) (SD-5 :E2) VMUT C4176 104Z PRIN_DAC C4177 104Z +5V_VD PBIN_DAC C4244 104Z C4243 104Z R4147 C4147 C4178 104Z 2.7k 0.47/50 SYCDET R4143 56K Q4004...
  • Page 15 HT-R940 SCHEMATIC DIAGRAMS-5 SPEAKER TERMINAL SECTION NAVD-8811(2/2) MPP Only C6602 VIDEO & SPEAKER TERMINAL PC BOARD 104Z L6602 S1.3C SPRLF R6602 RL6602 CENTER Q6601 R6612 DTC123JKA SPEAKER SPRLCS +24V Q6602 RLGND MDC Only DTC123JKA J6851 CSPE LSPE LSPE P6601 RSPE...
  • Page 16 HT-R940 SCHEMATIC DIAGRAMS-6 XM DIGITAL TRANSCEIVER SECTION (MDC Only) <Note> NC=No mount of parts. SD = SCHEMATIC DIAGRAMS NADG-8809 +12V R2031 C2025 821J NJM4580M-D 22(1/2W) Q2003 C2021 R2021 R2025 Q2002 XM DIGITAL TRANSCEIVER PC BOARD C2027 AK4384ET 2.2K 10/50 2.2K C2018 470/6.3...
  • Page 17 HT-R940 SCHEMATIC DIAGRAMS-7 DISPLAY SECTION Q7001 16-BT-128GNYK NOTE THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY REPLACE ONLY WITH PART NUMBER SPECIFIED. VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL). ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
  • Page 18 HT-R940 NADIS-8785 DISPLAY PC BOARD REMIN FLDRST FLDCS FLDCLK FLDSDO KEY0 MASTER KEY1 R7023 R7021 C7011 223Z VOLUME KEY2 C7012 223Z KEY3 R7024 +5.6S S7001 KEYINT0 C7010 R7007 220 FAC1 223Z R7008 220 To NADG-8808 KEYINT1 C7014 FAC2 (SD-3 : A1)
  • Page 19 HT-R940 SCHEMATIC DIAGRAMS-8 POWER SUPPLY SECTION NAPS-8787 NOTE THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY POWER SUPPLY PC BOARD REPLACE ONLY WITH PART NUMBER SPECIFIED. D933 VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL). 1SS133 ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.
  • Page 20 Sales & Product Planning Div. : 2-1, Nisshin-cho, Neyagawa-shi, OSAKA 572-8540, JAPAN Tel: 072-831-8023 Fax: 072-831-8124 ONKYO U.S.A. CORPORATION 18 Park Way, Upper Saddle River, N.J. 07458, U.S.A. Tel: 201-785-2600 Fax: 201-785-2650 http://www.us.onkyo.com/ ONKYO EUROPE ELECTRONICS GmbH Liegnitzerstrasse 6, 82194 Groebenzell, GERMANY Tel: +49-8142-4401-0 Fax: +49-8142-4401-555 http://www.eu.onkyo.com/...