Denon DRA-395 Manuel utilisateur

Service manual

DRA-295 36~69

DRA-395 2~34

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Hi-Fi AM-FM Stereo Receiver

SERVICE MANUAL

MODEL

DRA-395

AM-FM STEREO RECEIVER

SAFETY PRECAUTIONS ............................................ 2

SPECIFICATIONS ....................................................... 2

DISASSEMBLY ........................................................... 3

ADJUSTMENT .......................................................... 4,5

BLOCK DIAGRAM ....................................................... 6

LEVEL DIAGRAM ........................................................ 7

SEMICONDUCTORS ............................................ 8~12

PRINTED WIRING BOARDS .............................. 13~17

NOTE FOR PARTS LIST ........................................... 18

PARTS LIST OF P.W.B. UNIT ASS'Y ................. 19~24

EXPLODED VIEW ..................................................... 25

PARTS LIST OF EXPLODED VIEW ......................... 26

PACKING VIEW ........................................................ 27

— TABLE OF CONTENTS —

Some illustrations using in this service manual are slightly different from the actual set.

PARTS LIST OF PACKING & ACCESSORIES ........ 27

WIRING DIAGRAM .................................................... 28

SCHEMATIC DIAGRAMS ................................... 29~34

(1/6) INPUT UNIT ........................................................... 29

(2/6) VOLUME UNIT ....................................................... 30

(3/6) MAIN UNIT ............................................................. 31

(4/6) VIDEO UNIT ........................................................... 32

CONNECTOR UNIT ............................................... 32

(5/6) FRONT UNIT .......................................................... 33

SWITCH UNIT ........................................................ 33

POWER SW/HP UNIT ............................................ 33

(6/6) TUNER UNIT .......................................................... 34

For U.S.A. & Canada model

14-14, AKASAKA 4-CHOME, MINATO-KU, TOKYO 107-8011 JAPAN

Telephone: 03 (3584) 8111

X0118 842 NC 0108

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DRA-395

SPECIFICATIONS



Audio Section

(Power Amplifier)

Rated output: 80W + 80W (8Ω/ohms, 20Hz ~ 20kHz with 0.08% T.H.D.)

Output terminals: A or B 4 to 16Ω/ohms

A + B 8 to 16Ω/ohms

(Analog)

LINE input - PRE OUT

Input sensitivity/input impedance: 200mV/47kΩ/kohms

Frequency response: 10Hz ~ 50kHz: ±1.5dB

S/N ratio: 100 dB (IHF-A weighted)

Total harmonic distortion: 0.009% (−3dB at rated output, 8Ω/ohms) (1kHz)

Rated output: 1.2V

PHONO input - REC OUT

Input sensitivity/input impedance: 2.5mV/47kΩ/kohms

RIAA deviation: ±0.5dB (20Hz ~ 20kHz)

S/N ratio: 74dB (IHF-A weighted, with 5mV input)

Total harmonic distortion: 0.03% (1kHz, 3V)

Rated output/Maximum output: 150mV/7V



Video Section

(Standard Video Jacks)

Input/output level and impedance: 1V p-p, 75Ω/ohms

Frequency response: 5Hz ~ 10MHz +1, −3dB



Tuner Section

[FM] (note: µV at 75Ω/ohms, 0dBf = 1×10-15W) [AM]

Receiving range: 87.50MHz ~ 107.90 MHz 520kHz ~ 1710kHz

Usable sensitivity: 1.4µV (14.2dBf) 18µV

50dB quieting sensitivity: MONO 2.8µV (20.2dBf)

STEREO 23µV (38.5dBf)

S/N ratio: MONO 80dB (IHF-A weighted)

STEREO 75dB (IHF-A weighted)

Total harmonic distortion: MONO 0.15% (1kHz)

STEREO 0.3% (1kHz)



General

Power supply: AC120V, 60Hz

Power consumption: 3.39A

Maximum external dimensions: 434 (W) ×147 (H) ×417 (D) mm (17-1/16″×5-25/32″×16-7/16″)

Weight: 9.7kg (21lbs 6oz)



Remote Control Unit (RC-894)

Batteries: R03/AAA Type (two batteries)

External dimensions: 64 (W) ×206 (H) ×19 (D) mm (2-13/64″×8-9/32″×3/4″)

Weight: 140g (Approx. 4.9 oz) (including batteries)

* For purposes of improvement, specifications and design are subject to change without notice.

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. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the

power cord is less than 460 kohms, the unit is defective.

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DRA-395

DISASSEMBLY

(Follow the procedure below in reverse order when reassembling)

Top Cover

Remove 6 screws 1and 3 screws 2, detach the Top Cover

in the arrow direction. Top Cover

Front Panel

1. Remove 4 screws 3and 2 screws 4.

2. Detach the Front Panel in the arrow direction.

Rear Panel

1. Remove cord bushing 5from the Rear Panel.

2. Remove 26 screws 6.

3. Detach the Rear Panel in the arrow direction.

Front Panel

Rear Panel

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DRA-395

FM ALIGNMENT

Input Output Adjustment

Step Alignment

Item

Tuning

Frequency

Setting Type Frequency Input

Level Modulation Coupling Type Connect to Points Adjust to

1Center

Adjustment

98.1MHz

(98.0MHz) FM SSG 98.1MHz 60dBµMono

1kHz 100%

Antenna

Terminal

Digital

Voltmeter R471 T402 ±50mV

2 Distortion 98.1MHz

(98.0MHz) FM SSG 98.1MHz 60dBµMono

1kHz 100%

Antenna

Terminal

Distortion

Meter

Output

Terminal (L) T403 Minimum

Distortion

3 Repeat Steps 1 and 2

4 Signal Level 98.1MHz

(98.0MHz) FM SSG 98.1MHz 20dBµOFF Antenna

Terminal

Light “TUNED” on

FL Display VR402

ADJUSTMENT

Tuner Section

CONNECTION DIAGRAM OF MEASURING INSTRUMENTS



FM

STEREO

MODULATOR

FM SSG

Digital

Voltmeter

75ohm

T402 T403

IC402

VR402

TUNER B'D

R471

20 +14

−10 dB



AM

T402 T403

IC402

TUNER B’D

R471

VR401

AM ALIGNMENT

Output Adjustment

Step Alignment

Item Frequency Input Type Connect to Points Adjust to Remarks

1 Signal Level 999 (1000)

kHz AM SSG 

VR401 Light “TUNED”on

FL Display

SSG OUTPUT

74dBµ(EMF)

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DRA-395

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).

(2) Presetting

●POWER (Power sourse switch) →OFF

●SPEAKER (Speaker terminal) →No load (Do not connect speaker, dummy resistor, etc.)

Adjustment

(1) Remove top cover and set VR101, VR102 on Amp. Unit at full counterclockwise ( ) position.

(2) Connect DC Voltmeter to test points (Lch: TP101, Rch: TP102).

(3) Connect power cord to AC Line, and turn power switch "ON".

(4) Presetting. MASTER VOLUME : "---" counterclockwise ( min.)

FUNCTION : CD

(5) Within 2 minutes after the power on, turn VR101 clockwise ( ) to adjust the TEST POINT voltage to 1.5 mV ±0.5 mV

DC.

(6) After 10 minutes from the preset above, turn VR101 to set the voltage to 2.5 mV ±0.5 mV DC.

(7) Adjust the Variable Resistors of other channels in the same way.

VR101

TP101

VR102

TP102

Lch

Rch

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DRA-395

BLOCK DIAGRAM

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CD 11

ATT

MUTE

POWER AMP

MAIN VOL

INPUT

BUFFER

AMP

ATT

MAIN

MULTI ROOM

CD IN

-18dB

VOL 00

+15.5dB -35.5dB

+16.2dB

+27dB

SPK OUT

2.83V

(1W/8ohms)

H/P OUT

47mV

(1W/8ohms)

MULTI ROOM OUT

1.2V

(200mV)

SPK OUT

H/P OUT

MULTI OUT

DRA-395

LEVEL DIAGRAM

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130

5180

100

CXP82840-319Q Terminal Function

SEMICONDUCTORS



IC’s

CXP82840-319Q (IC900)

1 G2/A1 O FL G02

2 G1/A0 O FL G01

3 NC(Vdd) I NC(Connect to Vdd)

4 POWER DOWN I AC OFF Detect

5 ENC VOLUME UP I Encoder VOLUME UP

6 RDS CLOCK I RDS clock input(TDA7330)

7 ENC VOLUME DOWN I Encoder VOLUME DOWN

8 REMOCON I Remote signal input.

9 PROTECTION I Protection detecting input.

10 SUB ZONE2 LED O ZONE3 LED indicator control

11 SUB ZONE1 LED O ZONE2 LED indicator control

12 62446 LATCH O Electronic volume control.(M62446 LATCH)

13 FUNCTION SW 1 CE O Function IC control.(TC9274 CE)

14 FUNCTION 1/2 DATA O Function IC control.(TC9274 DATA)

15 FUNCTION 1/2 CLOCK O Function IC control.(TC9274 CLOCK)

16 VOLUME,PLL,4094,DATA O LC72131,M62446,KIC9459,TC9184,TC4094(DATA)

17 VOLUME,PLL,4094,CLOCK O LC72131,M62446,KIC9459,TC9184,TC4094(CLOCK)

18 TUNED I TUNED signal in.

19 STEREO I STEREO signal in.

20 IF COUNT I PLL data in.(LC72131)

21 TUNER MUTE O Tuner mute output.

22 PLL CE O LC72131(CE)

23 4094 STB O TC4094(STB)

24 VOLUME STB O KIC9459,TC9184(STB)

25 SUB 1 MUTE O ZONE2 mute control.

26 MAIN MUTE O MAIN,Subwoofer mute output.

27 POWER RELAY O Power supply relaycontrol.

28 AV REF. I Reference voltage input for A/D converter.

29 1511 DATA O Not used.

30 RDS DATA I Not used.

31 KEY IN 1 I Key input 1

32 KEY IN 2 I Key input 2

33 KEY IN 3 I Key input 3

34 STEP OPTION I Area select.

35 SET OPTION I Model select.

36 SPEAKER A LED 1 O SPEAKER A LED indicator control

37 A VSS I A/D converter GND.

38 RESET I Low-level active,system reset.

39 EXTAL I EXTAL(10MHz)

40 XTAL O XTAL(10MHz)

41 VSS I GND

42 NC(TX) O Not used.

43 G(TEX) I GND

44 VDD I Vcc SUPPLY.

45 VFDP I FDP voltage supply.

No. Pin Name FunctionI/O

46 SPEAKER B LED 2 O SPEAKER B LED indicator control

47 STBY LED 3 O STANDBY LED indicator control

48 PD2/A53 O FL P38

49 PD3/A52 O FL P37

50 PD4/A51 O FL P36

51 PD5/A50 O FL P01

52 PD6/A49 O FL P02

53 PD7/A48 O FL P03

54 PF0/A47 O FL P04

55 PF1/A46 O FL P05

56 PF2/A45 O FL P06

57 PF3/A44 O FL P07

58 PF4/A43 O FL P08

59 PF5/A42 O FL P09

60 PF6/A41 O FL P10

61 PF7/A40 O FL P11

62 PG0/A39 O FL P12

63 PG1/A38 O FL P13

64 PG2/A37 O FL P14

65 PG3/A36 O FL P15

66 PG4/A35 O FL P16

67 PG5/A34 O FL P17

68 PG6/A33 O FL P18

69 PG7/A32 O FL P19

70 PH0/A31 O FL P20

71 PH1/A30 O FL P21

72 PH2/A29 O FL P22

73 PH3/A28 O FL P23

74 PH4/A27 O FL P24

75 PH5/A26 O FL P25

76 PH6/A25 O FL P26

77 PH7/A24 O FL P27

78 A23 O FL P28

79 A22 O FL P29

80 A21 O FL P30

81 A20 O FL P31

82 A19 O FL P32

83 A18 O FL P33

84 A17 O FL P34

85 A16 O FL P35

86 G16 O FL G16

87 G15 O FL G15

88 G14 O FL G14

89 Vdd I Vcc SUPPLY.

90 G13 O FL G13

91 G12 O FL G12

92 G11 O FL G11

93 G10 O FL G10

94 G9 O FL G09

95 G8 O FL G08

96 G7 O FL G07

97 G6 O FL G06

98 G5 O FL G05

99 G4 O FL G04

100 G3 O FL G03

DRA-395

1CXP82840.p65 01/08/18, 15:40Page 8-9 AdobePageMaker6.5J/Win

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DRA-395

LA1266 (IC402)

GND

Vcc

BUFFER

FM - IF

Q.D.

REG

OSC

BUFFER

NARROW

S-METER S-METER

LED

DRIVER

RF MIX

AM-IF DET

AGC

POST

AMP

AM-IF FM-IF FM-IN

AM - I N

TC9184AP (IC602)

116 7 8

910

BASS+

BASS-

COM

TREBLE-

TREBLE+

GND

DATA

STB

BASS+

BASS-

COM

TREBLE-

TREBLE+

Ladder resister

Analog switch

13 bit latch circuit

Level shift

20 bit Shift register circuit

Analog switch

Ladder resister

Analog switch

13 bit latch circuit

Code

detect

circuit

Analog switch

Ladder resister

17 16 15 14 13 12

LA3401 (IC403)

VOL

REG OSC

SYMMETRICAL

REOCTANCE

CIRCUIT

PHASE

COMPARATOR

VCO STOP

PILOT DET

FF FF FF

38kHz

38kHz 90°

19kHz 90°

MUTING

FM AM CHANGE

Rc Rb

234

DECODER MUTING CONTROL

FM AM CHANGE OVER

Vcc ON

MUTING

OUTPUT

STEREO

SWITCH

TRIGGER

LAMP

DRIVER

10 11

LC72131M (IC401)

120

219

318

417

516

615

714

813

912

10 11

XI N

BO1

BO2

BO3

BO4

IO1

AOUT

AI N

FMIN

AMI N

IO2

IFIN

Vss

XOUT

BA7625 (IC501)

Monitor OUT

GND

IN5

GND

IN4

CTL E

IN3

CTL D

IN1

CTL A

V OUT1

Vcc

IN2

CTL B

V OUT2

CTL C

6dB

LOGIC

ABE

MONITOR OUT

C D E V OUT 1 C D E V OUT 2

LL *IN 1 LL*

LL *IN 1

HL *IN 2 HL*IN 2 HL *

LH *IN 3 LH*IN 3 LH *IN 3

HH L IN4 HHL IN4 HH L IN4

HHH IN5 HHH IN5 HHH IN5

Note 1: * mark means that feasible for either H or L.

Note 2: Each input terminal is provided with sink chip clamp (BA7625).

Each input terminal takes 20kohm at the end (BA7626).

Vss

BASS

CON

TREBLE

GND

VDD

BASS

COM

TREBLE

STB

DATA

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