Denon DRA-395 User manual

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: [phone]
X0118 842 NC 0108

2
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.

3
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.
2
1
1
3
Rear Panel
1. Remove cord bushing 5from the Rear Panel.
2. Remove 26 screws 6.
3. Detach the Rear Panel in the arrow direction.
4
Front Panel
Rear Panel
5
6
6
6

4
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)

5
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

8
76
5
4
3
2
1
A
B
C
D
E
DRA-395
6
BLOCK DIAGRAM

CD 11
2
3
8
4
6
5
8
7
4
7
6
5
8
4
6
5
8
7
4
1
1
1
ATT
MUTE
POWER AMP
MAIN VOL
INPUT
BUFFER
AMP
ATT
1
1
1
1
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)
(200mV)
SPK OUT
H/P OUT
MULTI OUT
8
76
5
4
3
2
1
A
B
C
D
E
DRA-395
7
LEVEL DIAGRAM

130
31
50
5180
81
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.
Pin
No. Pin Name FunctionI/O
Pin
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
8
DRA-395
1CXP82840.p65 01/08/18, 15:40Page 8-9 AdobePageMaker6.5J/Win

9
DRA-395
LA1266 (IC402)
10
4
13
8
19
15
17
18
14
21
22
GND
Vcc
5
11
IF
BUFFER
IF
BUFFER
2
FM - IF
6
Q.D.
7
REG
23
OSC
OSC
BUFFER
24
NARROW
S-METER S-METER
16
LED
DRIVER
RF MIX
12
20
AM-IF DET
AGC
POST
AMP
9
13
AM-IF FM-IF FM-IN
AM - I N
TC9184AP (IC602)
2
3
4
5
6
116 7 8
910
15
14
13
BASS+
BASS-
COM
TREBLE-
TREBLE+
V
SS
V
DD
GND CK
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
Ladder resister
Analog switch
13 bit latch circuit
Code
detect
circuit
Analog switch
Ladder resister
20
19
18
17 16 15 14 13 12
9 87
5
6
1
21
LA3401 (IC403)
22
VOL
REG OSC
SYMMETRICAL
REOCTANCE
CIRCUIT
PHASE
COMPARATOR
VCO STOP
PILOT DET
FF FF FF
38kHz
FF
38kHz 90°
FF
19kHz 90°
MUTING
FM AM CHANGE
Ro
Rc
Rc Rb
234
DECODER MUTING CONTROL
FM AM CHANGE OVER
Vcc ON
MUTING
MUTING
OUTPUT
STEREO
SWITCH
TRIGGER
LAMP
DRIVER
Rb
10 11
LC72131M (IC401)
120
219
318
417
516
615
714
813
912
10 11
XI N
CE
DI
CL
DO
BO1
BO2
BO3
BO4
IO1
AOUT
AI N
PD
V
DD
FMIN
AMI N
IO2
IFIN
Vss
XOUT
BA7625 (IC501)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
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
6dB
LOGIC
LOGIC
ABE
MONITOR OUT
C D E V OUT 1 C D E V OUT 2
LL *IN 1 LL*
¾
LL *IN 1
HL *IN 2 HL*IN 2 HL *
¾
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).
11
12
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Vss
BASS
+
BASS
-
CON
TREBLE
-
TREBLE
+
GND
CK
VDD
BASS
+
BASS -
COM
TREBLE
-
TREBLE +
STB
DATA
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13

10
DRA-395
ABLC
GND
Vcc
161
152
143
134
125
116
107
9
8
STR
D
CP
QP
0
QP
1
QP
4
QP
5
QP
6
QP
7
QS
2
QS
1
QP
3
QP
2
GND
OE
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
OUT4
OUT3
OUT2
OUT1
AV
DD
DV
DD
SW
OUT
SR
OUT
SL
OUT
C
OUT
R
OUT
L
OUT
AV
SS
SWin
GNDS
SRin
SLin
GNDC
Cin
DNDR
Rin
GNDL
Lin
BYPASSR
BLPASSL
LTRE
LBASS3
LBASS2
LBASS1
CLK
DATA
LATCH
DGND
AGND
CL1
CL2
CR1
CR2
RTRE
RBASS3
RBASS2
RBASS1
tone tone
OUTPUT
PORT
MCU
I/F
V CC
VOUT
22kohm
B.P.F
PD
volume
volume
volume
volume
volume
volume
TC9274N-008 (IC303)
M62446FP (IC603)
PC74HC4094 (IC604)

ICP-N15 (IC105)

P43T7D330BW16
NJL64H380A(RMC900)
IC PROTECTOR
IR SENSOR

POSISTOR
Detector
Comparator
LimiterAmpHead Amp
FRONT VIEW
FRONT VIEW
Vout
GND
Vcc
FRONT VIEW
A OUTPUT
A –INPUT
A+INPUT
V
B OUTPUT
V
B –INPUT
B +INPUT
1
2
3
45
7
8
6
NJM2068DD (IC300 302, 605 610)
8
7
5
6
4
3
2
1
ABLC
Head
Amp
Limiter
Amp
+
–
IN
C1
C2 GNDfo NC
OUT
Vcc
CXA1511M(IC502)
81
72
63
54
IN
C1
C2
GND
NC
fo
OUT
V
CC
KIC9459F (IC601)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Vss
L-OUT
NC
L-IN
L-LD1
L-LD2
L.A.GND
NC
CS1
NC
GND
CK
VDD
R-OUT
NC
R-IN
R-LD1
R-LD2
R.A.GND
NC
CS2
NC
STB
DATA
L-ch R-ch
KIA7805AP (IC103)
NJM7805FA (IC104)
KIA7815AP (IC101)
NJM7915FA (IC102)
Input GND
Output
FRONT
VIEW
GND Input
Output
FRONT
VIEW
42
S1 41
S1S1 40
39
S1 38
S1
S1S1 37
S1 36
S7 35
S8 42
S1S5
34
S1 42
42
42
42
33
S10 32
S11 31
S12 30
42
42
42
42
S13 29
S14 28
S15 27
S16 26
42
42
42
42
S17 25
S18 24
23
22
STB
DATA
S9
S6
S1
S3
S4
S2
VDD
1
2
3
4
5
6
7
S78
S8
S5
9
10
S1011
S1112
S1213
S1314
S1415
S15
16
S1617
S1718
S1819
20
21
GND
CK
S9
S6
S1
S3
S4
S2
VSS
BPF
BEF
Detector &
Comparator Integrator Hysteresis
Comparator