Denon DRA-295 Service Manual
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Denon DRA-295 Service Manual

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MODEL
AM-FM STEREO RECEIVER
SAFETY PRECAUTIONS .......................................... 36
SPECIFICATIONS ..................................................... 36
DISASSEMBLY ......................................................... 37
ADJUSTMENT ...................................................... 38,39
BLOCK DIAGRAM ..................................................... 40
LEVEL DIAGRAM ...................................................... 41
SEMICONDUCTORS .......................................... 42~46
PRINTED WIRING BOARDS .............................. 47~51
NOTE FOR PARTS LIST ........................................... 52
PARTS LIST OF P.W.B. UNIT ASS'Y ................. 53~59
EXPLODED VIEW ..................................................... 60
PARTS LIST OF EXPLODED VIEW .................... 61,62
PACKING VIEW ........................................................ 63
Some illustrations using in this service manual are slightly different from the actual set.
14-14, AKASAKA 4-CHOME, MINATO-KU, TOKYO 107-8011 JAPAN
SERVICE MANUAL
DRA-295

- TABLE OF CONTENTS -

WIRING DIAGRAM .................................................... 64
SCHEMATIC DIAGRAMS ................................... 65~69
Telephone: 03 (3584) 8111
Hi-Fi AM-FM Stereo Receiver
(1/5)
INPUT UNIT ........................................................... 65
VIDEO UNIT ........................................................... 65
(2/5)
VOLUME UNIT ....................................................... 66
CONNECTOR UNIT ............................................... 66
(3/5)
MAIN UNIT ............................................................. 67
(4/5)
FRONT UNIT .......................................................... 68
SWITCH UNIT ........................................................ 68
POWER SW/HP UNIT ............................................ 68
(5/5)
TUNER UNIT .......................................................... 69
For U.S.A., Canada
& Europe model
X0118 842 NC 0108

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Summary of Contents for Denon DRA-295

  • Page 1: Table Of Contents

    For U.S.A., Canada & Europe model Hi-Fi AM-FM Stereo Receiver SERVICE MANUAL DRA-295 MODEL AM-FM STEREO RECEIVER — TABLE OF CONTENTS — SAFETY PRECAUTIONS .......... 36 PARTS LIST OF PACKING & ACCESSORIES ..63 SPECIFICATIONS ............. 36 WIRING DIAGRAM ............ 64 DISASSEMBLY ............

  • Page 2: Safety Precautions

    DRA-295 SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check.

  • Page 3: Disassembly

    DRA-295 DISASSEMBLY (Follow the procedure below in reverse order when reassembling) Top Cover Top Cover Remove 6 screws and 3 screws , detach the Top Cover in the arrow direction. Front Panel 1. Remove 4 screws and 2 screws 2. Detach the Front Panel in the arrow direction.

  • Page 4: Adjustment

    DRA-295 ADJUSTMENT Tuner Section CONNECTION DIAGRAM OF MEASURING INSTRUMENTS T402 T403 STEREO R471 MODULATOR IC402 75ohm FM SSG VR402 Digital Voltmeter TUNER B'D FM ALIGNMENT Input Output Adjustment Tuning Alignment Step Frequency Input Item Type Frequency Modulation Coupling Type Connect to...
  • Page 5 DRA-295 Audio Section Idling Current Required measurement equipment : DC Voltmeter Preparation (1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room tempereture 15 °C ~ 30 °C (59 °F ~ 86 °F).

  • Page 6: Block Diagram

    DRA-295 BLOCK DIAGRAM...

  • Page 7: Level Diagram

    DRA-295 LEVEL DIAGRAM MAIN VOL POWER AMP INPUT BUFFER SPK OUT H/P OUT MUTE SUB OUT MAIN SPK OUT 2.83V 26dB (1W/8ohms) CD IN (200mV) -35.5dB H/P OUT -18dB +15.5dB 47mV (1W/8ohms) VOL 00 SUB ROOM SUB ROOM OUT 1.2V +16.2dB...

  • Page 8: Semiconductors

    DRA-295 SEMICONDUCTORS Pin Name Function IC’s SPEAKER B LED 2 SPEAKER B LED indicator control CXP82840-321Q (IC900) STBY LED 3 STANDBY LED indicator control PD2/A53 FL P38 PD3/A52 FL P37 PD4/A51 FL P36 PD5/A50 FL P01 PD6/A49 FL P02 PD7/A48...
  • Page 9 DRA-295 LC72131M (IC401) LA1266 (IC402) AM-IF FM-IF FM-IN XOUT POST FM - IF Q.D. BUFFER BUFFER AOUT AM-IN AM-IF NARROW S-METER BUFFER S-METER DRIVER FMIN LA3401 (IC403) AMIN PHASE PILOT DET LAMP COMPARATOR IFIN DRIVER VCO STOP SYMMETRICAL TRIGGER REOCTANCE...
  • Page 10 DRA-295 NJM7805FA (IC104) NJM7915FA (IC102) TDA7330B (IC901) (Europe model only) NJM7812FA (IC502) (U.S.A./Canada model) KIA7815AP (IC101) MUXIN VREF FRONT FRONT COMP FSEL VIEW VIEW FILOUT QUAL RDDA OSCOUT RDCL OSCIN PC74HC4094 (IC600) M62446FP (IC601) OUT4 OUT3 OUTPUT PORT volume OUT2...
  • Page 11 DRA-295 TRANSISTORS DTA114EK DTA114YK DTA series DTC series DTC114YK VIEW DTA114ES DTA144ES 10kohm 10kohm 10kohm 10kohm DTC114ES DTA114EK DTC114ES 10kohm 10kohm 10kohm 47kohm DTA114ES DTC114YK DTA114YK 10kohm 47kohm 10kohm 47kohm DTC114YS DTC114YS 47kohm 47kohm DTA114ES 47kohm 47kohm DTC144ES DTC144ES FRONT...
  • Page 12 DRA-295 FL DISPLAY 16-st-42GNK (FL900) TUNED STEREO PHONO TUNER DVD / - 2 - 3 AUTO V.AUX TAPE MULTI PRO LOGIC DIGITAL DIGITAL ANALOG G2~G16 G12 G10 TUNER DVD / VDP TV / DBS TUNED STEREO PHONO - 2 - 3 V.AUX...

  • Page 13: Printed Wiring Boards

    DRA-295 PRINTED WIRING BOARDS MAIN P .W.B. UNIT Ass'y COMPONENT SIDE...
  • Page 14 DRA-295 VOLUME P .W.B. UNIT Ass'y COMPONENT SIDE...
  • Page 15 DRA-295 FOIL SIDE...
  • Page 16 DRA-295 TUNER P .W.B. UNIT Ass'y COMPONENT SIDE...
  • Page 17 DRA-295 FOIL SIDE...

  • Page 18: Note For Parts List

    DRA-295 NOTE FOR PARTS LIST Part indicated with the mark " " are not always in stock and possibly to take a long period of time for supplying, or in some case supplying of part may be refused. When ordering of part, clearly indicate "1" and "I" (i) to avoid mis-supplying.

  • Page 19: Parts List Of P.w.b. Unit Ass

    DRA-295 PARTS LIST OF P.W.B. UNIT Note: The symbols in the column “Remarks” indicate the following destinations. MAIN P.W.B. UNIT ASS'Y E3: U.S.A./Canada model E2: Europe model Ref. No. Part No. Part Name Remarks Ref. No. Part No. Part Name...
  • Page 20 DRA-295 Ref. No. Part No. Part Name Remarks Ref. No. Part No. Part Name Remarks Q'ty C175 963 9005 189 Mylar film 2200pF/63V for E2 T101 960 0185 708 Power trans. (Sub) for E3 D020222068050 8200280960010 C178 963 9005 189 Mylar film 2200pF/63V...
  • Page 21 DRA-295 FRONT P.W.B. UNIT ASS'Y Ref. No. Part No. Part Name Remarks Ref. No. Part No. Part Name Remarks SEMICONDUCTORS GROUP R990,991 963 9004 397 Carbon chip 56kohm 1/16W C20005636M160 R993 963 9004 397 Carbon chip 56kohm 1/16W C20005636M160 IC600...
  • Page 22 DRA-295 TUNER P.W.B. UNIT ASS'Y Ref. No. Part No. Part Name Remarks Ref. No. Part No. Part Name Remarks C912 963 9004 708 Ceramic chip 0.1uF/50V D011104577160 SEMICONDUCTORS GROUP C913 Electrolytic 4.7uF/50V D0404R7087100 IC401 963 0043 700 IC LC72131 J120721310030 C914,915 963 9004 698 Ceramic chip 0.01uF/50V...
  • Page 23 DRA-295 Ref. No. Part No. Part Name Remarks Ref. No. Part No. Part Name Remarks R405 960 9003 807 Metal film 100ohm 1/4W (NB) C060010163050 R450 963 9003 398 Carbon chip 1kohm 1/16W for E2 R406 963 9004 342 Carbon chip 4.7kohm 1/16W C20004726M160...
  • Page 24 DRA-295 Ref. No. Part No. Part Name Remarks Ref. No. Part No. Part Name Remarks C419 Electrolytic 10uF/50V D040100087050 C506,507 963 9004 562 Ceramic 0.047uF/50V for E3 C420 963 9004 591 Ceramic chip 22pF/50V D010220167160 D005473597520 C421 963 9004 928 Ceramic chip 24pF/50V...
  • Page 25 DRA-295 Ref. No. Part No. Part Name Remarks Q'ty Ref. No. Part No. Part Name Remarks Q'ty FE401 960 0187 706 Tuner pack E900401010020 X402 963 0043 302 Ceramic resonator CSB456F11 E830456000050  G401 1P Wire (L=80) 8410800010010  G900...

  • Page 26: Exploded View

    DRA-295 EXPLODED VIEW for E2 for E3 for E2 for E3 Note: The symbols indicate the following destinations. E3: U.S.A.&Canada model E2: Europe model...

  • Page 27: Parts List Of Exploded View

    DRA-295 PARTS LIST OF EXPLODED VIEW Note: The symbols in the column “Remarks” indicate the following destinations. E3: U.S.A./Canada model E2: Europe model Ref. No. Part No. Part Name Remarks Q'ty Ref. No. Part No. Part Name Remarks Q'ty ...
  • Page 28 DRA-295 Ref. No. Part No. Part Name Remarks Q'ty 58 963 0089 007 FFC cable CP901 L301171230010 SCREWS A 963 0018 007 Screw 3×8 (B)-Z B020030081B10 B 960 9008 527 Screw 3×8 (B) W-B 1500001456020 C 963 0048 200 Screw 3×10 (B)-Z B020030101B10 D 960 0108 714 Screw 3×10 (B)-B...

  • Page 29: Packing View

    DRA-295 PACKING VIEW SPEAKER TERMINAL BUSHING (Europe model) Note: The symbols in the column “Remarks” indicate the following destinations. PARTS LIST OF PACKING & ACCESSORIES E3: U.S.A./Canada model E2: Europe model Ref. No. Part No. Part Name Remarks Q'ty Ref. No.

  • Page 30: Wiring Diagram

    DRA-295 WIRING DIAGRAM...

  • Page 31: Schematic Diagrams

    DRA-295 SCHEMATIC DIAGRAMS(1/5) + B LINE - B LINE SIGNAL LINE NOTICE WARNING: Parts marked with this symbol have critical characteristics. ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD Use ONLY replacement parts recommended by the manufacture.

  • Page 32: Volume Unit

    DRA-295 SCHEMATIC DIAGRAMS(2/5) + B LINE - B LINE SIGNAL LINE NOTICE WARNING: Parts marked with this symbol have critical characteristics. ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD Use ONLY replacement parts recommended by the manufacture.

  • Page 33: Main Unit

    DRA-295 SCHEMATIC DIAGRAMS(3/5) + B LINE - B LINE SIGNAL LINE WARNING: NOTICE ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM Parts marked with this symbol have critical characteristics. ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD Use ONLY replacement parts recommended by the manufacture.

  • Page 34: Front Unit

    DRA-295 SCHEMATIC DIAGRAMS(4/5) + B LINE SIGNAL LINE WARNING: NOTICE ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM Parts marked with this symbol have critical characteristics. ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD Use ONLY replacement parts recommended by the manufacture.

  • Page 35: Tuner Unit

    DRA-295 SCHEMATIC DIAGRAMS(5/5) + B LINE SIGNAL LINE NOTICE WARNING: ALL RESISTANCE VALUES IN OHM. k=1,000 OHM M=1,000,000 OHM Parts marked with this symbol have critical characteristics. ALL CAPACITANCE VALUES IN MICRO FARAD. P=MICRO-MICRO FARAD Use ONLY replacement parts recommended by the manufacture.

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