(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
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
Telephone: 03 (3584) 8111
X0118 842 NC 0108
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.
SPECIFICATIONS
Audio Section
(Power Amplifier)
Rated output:80W + 80W (8Ω/ohms, 20Hz ~ 20kHz with 0.08% T.H.D.)
Output terminals:A or B4 to 16Ω/ohms
A + B8 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
DRA-395
Video Section
(Standard Video Jacks)
Input/output level and impedance:1V p-p, 75Ω/ohms
Frequency response:5Hz ~ 10MHz +1, −3dB
(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
Lch
TP101
VR102
Rch
TP102
5
BLOCK DIAGRAM
1
DRA-395
2
3
4
5
76
8
A
B
C
D
E
6
LEVEL DIAGRAM
1
DRA-395
2
INPUT
BUFFER
AMP
3
MAIN VOL
4
5
76
8
POWER AMP
A
CD
(200mV)
1
MAIN
384
2
584
6
5
1
1
7
1
4
7
8
6
1
MUTE
5
4
7
8
6
1
ATT
ATT
SPK OUT
1
H/P OUT
1
MULTI OUT
1
B
SPK OUT
2.83V
+27dB
CD IN
(1W/8ohms)
C
(200mV)
MULTI ROOM
-18dB
VOL 00
+15.5dB
+16.2dB
-35.5dB
H/P OUT
47mV
(1W/8ohms)
D
MULTI ROOM OUT
1.2V
E
7
130
31
50
5180
81
100
DRA-395
SEMICONDUCTORS
IC’s
CXP82840-319Q (IC900)
CXP82840-319Q Terminal Function
Pin
No.
1G2/A1OFL G02
2G1/A0OFL G01
3NC(Vdd)INC(Connect to Vdd)
4POWER DOWNIAC OFF Detect
5ENC VOLUME UPIEncoder VOLUME UP
6RDS CLOCKIRDS clock input(TDA7330)
7ENC VOLUME DOWNIEncoder VOLUME DOWN
8REMOCONIRemote signal input.
9PROTECTIONIProtection detecting input.
10 SUB ZONE2 LEDOZONE3 LED indicator control
11 SUB ZONE1 LEDOZONE2 LED indicator control
12 62446 LATCHOElectronic volume control.(M62446 LATCH)
13 FUNCTION SW 1 CEOFunction IC control.(TC9274 CE)
14 FUNCTION 1/2 DATAOFunction IC control.(TC9274 DATA)
15 FUNCTION 1/2 CLOCKOFunction IC control.(TC9274 CLOCK)
16 VOLUME,PLL,4094,DATAO LC72131,M62446,KIC9459,TC9184,TC4094(DATA)
17 VOLUME,PLL,4094,CLOCKOLC72131,M62446,KIC9459,TC9184,TC4094(CLOCK)
18 TUNEDITUNED signal in.
19 STEREOISTEREO signal in.
20 IF COUNTIPLL data in.(LC72131)
21 TUNER MUTEOTuner mute output.
22 PLL CEOLC72131(CE)
23 4094 STBOTC4094(STB)
24 VOLUME STBOKIC9459,TC9184(STB)
25 SUB 1 MUTEOZONE2 mute control.
26 MAIN MUTEOMAIN,Subwoofer mute output.
27 POWER RELAYOPower supply relaycontrol.
28 AV REF.IReference voltage input for A/D converter.
29 1511 DATAONot used.
30 RDS DATAINot used.
31 KEY IN 1IKey input 1
32 KEY IN 2IKey input 2
33 KEY IN 3IKey input 3
34 STEP OPTIONIArea select.
35 SET OPTIONIModel select.
36 SPEAKER A LED 1OSPEAKER A LED indicator control
37 A VSSIA/D converter GND.
38 RESETILow-level active,system reset.
39 EXTALIEXTAL(10MHz)
40 XTALOXTAL(10MHz)
41 VSSIGND
42 NC(TX)ONot used.
43 G(TEX)IGND
44 VDDIVcc SUPPLY.
45 VFDPIFDP voltage supply.
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).
l 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.
l When ordering of part, clearly indicate "1" and "I" (i) to avoid mis-supplying.
l Ordering part without stating its part number can not be supplied.
l Part indicated with the mark " " is not illustrated in the exploded view.
l Not including Carbon Film ±5%, 1/4W Type in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.)
WARNING:
Parts marked with this symbol
Use ONLY replacement parts recommended by the manufacturer.
have critical characteristics.
DRA-395
ll
l Resistors
ll
Ex.: RN 14K2E182GFR
Type Shape Power Resist- Allowable Others
and per-ance error
formance
t
RD : Carbon2B : 1/8W F : ±1% P : Pulse-resistant type
RC : Composition2E : 1/4W G : ±2% NL : Low noise type
RS : Metal oxide film2H : 1/2W J : ±5% NB : Non-burning type
RW : Winding3A : 1WK : ±10% FR : Fuse-resistor
RN : Metal film3D : 2WM : ±20% F : Lead wire forming
RK : Metal mixture3F : 3W
t
3H : 5W
Resistance
1 8 2⇒1800 ohm = 1.8 kohm
s
s
• Units: ohm
1 R 2⇒1.2 ohm
s
s
• Units: ohm
Indicates number of zeros after effective number.
2-digit effective number.
1-digit effective number.
2-digit effective number, decimal point indicated by R.
t
t
ll
l Capacitors
ll
Ex.: CE04W1H2R2MBP
Type Shape Dielectric Capacity Allowable Others
and per- strengtherror
formance
t
CE :Aluminum foil0J : 6.3V F : ±1%HS : High stability type
electrolytic
CA :Aluminum solid1A : 10VG : ±2%BP : Non-polar type
electrolytic
CS :Tantalum electrolytic 1C : 16VJ : ±5%HR : Ripple-resistant type
CQ : Film1E : 25VK : ±10%DL : For change and discharge
CK :Ceramic1V : 35VM : ±20%HF : For assuring high
CC : Ceramic1H : 50VZ : +80%U : UL part
CP :Oil2A : 100V–20%C : CSA part
CM : Mica2B : 125V P : +100% W : UL-CSA type
CF : Metallized2C : 160V–0%F : Lead wire forming
CH : Metallized2D : 200V C : ±0.25pF
t
2E : 250V D : ±0.5pF
2H : 500V = : Others
2J : 630V
t
Capacity (electrolyte only)
2 2 2⇒2200µF
s
s
• Units: µF.
2 R 2⇒2.2µF
s
s
• Units: µF.
Indicates number of zeros after effective number.
2-digit effective number.
1-digit effective number.
2-digit effective number, decimal point indicated by R.
Capacity (except electrolyte)
2 2 2⇒2200pF=0.0022µF
s
s
(More than 2) Indicates number of zeros after effective number.
• Units: pF.
2 2 1⇒220pF
s
s
(0 or 1)Indicates number of zeros after effective number.
• Units: pF.
• When the dielectric strength is indicated in AC, "AC" is included after the dieelectric