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GXW-5.1

Ref. No. 3673

SERVICE MANUAL 042001

Digital Theater Station

GXW-5.1

UD 120V AC, 50Hz

SAFETY-RELATED COMPONENT
WARNING!!
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
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
GXW-5.1

SERVICE SAFETY PRECAUTIONS

1. Replacing the fuse 2. Safety check out
This symbol located near the fuse (Only U. S. A. model)
indicates that the fuse used is fast After correcting the original service problem, perform the
operating type. For continued protection against fire hazard, following safety check before releasing the set to the customer.
replace with same type fuse. For fuse rating refer to the Connect the insulating-resistance tester between the plug of
marking adjacent to the symbol. power supply cord and screw on the back panel.
Specifications: 3.3M ohm +/- 10% at 500 V.
Ce symbol indique le fusible utlise est a rapide.
Pour une protection permanente, n'untiliser que fusibles de
meme type. Ce darnier est la qu le present symbol est appse.

Circuit No. Part No. Description
F901 252159 2A-UL/T-237
NOTE: : 120 V model only

3. To initialize the unit
1. Press the standby button.
2. Press and hold down the STANDBY/ON, them press the
LATE NIGHT butoon at remoter controller.
3. After "CLEAR" is dislpayed, and initialized the unit.

4. Test mode
1. Press the standby button.
2. Press and hold down the STANDBY/ON, them press the
CHANNEL butoon.
3. Press the LEVEL/DISTANCE button and get the test mode
displayed "TEST-1-00".

EX) "TEST-1-00~01" is used the fan control operation.
GXW-5.1

FL TUBE VIEW

(15-BT-80GNK)
15G 13G 11G 9G 8G 6G 5G 4G 3G 2G

S2 S1

14G 12G 10G 7G 1G

a

h
f b
j k
g m

r
e n
p c

d
(15G - 1G)

P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 P17
15G a h j k b f m g c e r p n d
14G ญญญญ ญญญญ ญญญญ a h j k b f m g c e r p n d
13G S2 a h j k b f m g c e r p n d
12G ญญญญ ญญญญ ญญญญ a h j k b f m g c e r p n d
11G a h j k b f m g c e r p n d
10G ญญญญ ญญญญ ญญญญ a h j k b f m g c e r p n d
9G a h j k b f m g c e r p n d
8G a h j k b f m g c e r p n d
7G ญญญญ ญญญญ ญญญญ a h j k b f m g c e r p n d
6G S1 a h j k b f m g c e r p n d
5G a h j k b f m g c e r p n d
4G ญญญญ ญญญญ a h j k b f m g c e r p n d
3G a h j k b f m g c e r p n d
2G a h j k b f m g c e r p n d
1G a h j k b f m g c e r p n d
FL tube

93

99
98
97
96
95
94
92
91
90
89
88
87
86
85
84
83
82
81

100
P
P
P
P
P

1
2
3
4
5

1G
2G
3G
4G
5G
6G
7G
8G
9G
10G
11G
12G
13G
14G
15G
V load
Power
1 Vdd 8 P6 0
Q503

STBY/RECV
Power IC

2 7 VFL 9
TDA85630

3 Not used 7 P7 8
4 Not used 7 P8 7
5 Not used 7 P9 6
6 Not used 7 P10 5
DATA 7 SDO 7 P11 4
Fan control

CK 8 SCK 7 P12 3
9 Not used 7 P13 2
Q510

10 RESET P14 71
11 X2 P15 70
12 X1 P16 69

Q301
X7001

TC9482N
13 GND P17 68
5MHz

Electro volume
14 XT2 Not used 67
15 GND FAN CTL 66
Gain control
16 +5V GAINCTL 65
Q7001

STB 17 VOLSLT FAN HL 64
18 Not used POWER 63
MICROPROCESSOR CONNECTION DIAGRAM

19 ~DSPRST Not used 62
uPD780204GF-091-3BA

20 ~DSPCS ENC2 61
Q305

Not used
Q326

21 ENC1 60
22 DSPSCK Not used 59 Volume
23 DSPSDO FS96 58
24 DSPSDI ERF 57
25 GND Not used 56
26 LEVEL IN Not used 55
27 Not used Not used 54
28 MODE BTA15 53
29 Not used BTA16 52
30 Not used BTA17 51
~P
YS
GND
~CODECP
~DIRP

+5V

AMUT
~ABOOT/~INT

THERM_IN
S IN
~REMIN
D
D

Not used
K0
+V5
+V5
Not used
Not used
Not used
Not used
Not used

OFF
DIRCS
49

32
33
34
35
36
37
38
39
40
41
42
43
44
46
47
48
50

31
45

Audio mute

Power switch
From power muting circuit

DIRPD

DIRCS
DIR
Q701
AK4112A

ERF1
96kHz 24bit

U7001
GP1U281X
96FS

BTA17

BTA15
BTA16
CODECPD
DSPRST
DSPSCK

AB/INT
DSPCS
SDPSOI
DSPSOO

Q707 Q801
Q704
MX27C2000 AK4527
CS492604
EPROM 96kHz CODEC
DSP
GXW-5.1
FL tube

93

99
98
97
96
95
94
92
91
90
89
88
87
86
85
84
83
82
81

100
P
P
P
P
P

1
2
3
4
5

1G
2G
3G
4G
5G
6G
7G
8G
9G
10G
11G
12G
13G
14G
15G
V load
Power
1 Vdd 8 P6 0
Q503

STBY/RECV
Power IC

2 7 VFL 9
TDA85630

3 Not used 7 P7 8
4 Not used 7 P8 7
5 Not used 7 P9 6
6 Not used 7 P10 5
DATA 7 SDO 7 P11 4
Fan control

CK 8 SCK 7 P12 3
9 Not used 7 P13 2
Q510

10 RESET P14 71
11 X2 P15 70
12 X1 P16 69

Q301
X7001

TC9482N
13 GND P17 68
5MHz

Electro volume
14 XT2 Not used 67
15 GND FAN CTL 66
Gain control
16 +5V GAINCTL 65
Q7001

STB 17 VOLSLT FAN HL 64
18 Not used POWER 63
MICROPROCESSOR CONNECTION DIAGRAM

19 ~DSPRST Not used 62
uPD780204GF-091-3BA

20 ~DSPCS ENC2 61
Q305

Not used
Q326

21 ENC1 60
22 DSPSCK Not used 59 Volume
23 DSPSDO FS96 58
24 DSPSDI ERF 57
25 GND Not used 56
26 LEVEL IN Not used 55
27 Not used Not used 54
28 MODE BTA15 53
29 Not used BTA16 52
30 Not used BTA17 51
~P
YS
GND
~CODECP
~DIRP

+5V

AMUT
~ABOOT/~INT

THERM_IN
S IN
~REMIN
D
D

Not used
K0
+V5
+V5
Not used
Not used
Not used
Not used
Not used

OFF
DIRCS
49

32
33
34
35
36
37
38
39
40
41
42
43
44
46
47
48
50

31
45

Audio mute

Power switch
From power muting circuit

DIRPD

DIRCS
DIR
Q701
AK4112A

ERF1
96kHz 24bit

U7001
GP1U281X
96FS

BTA17

BTA15
BTA16
CODECPD
DSPRST
DSPSCK

AB/INT
DSPCS
SDPSOI
DSPSOO

Q707 Q801
Q704
MX27C2000 AK4527
CS492604
EPROM 96kHz CODEC
DSP
GXW-5.1
GXW-5.1

MICROPROCESSOR TERMINAL DESCRIPTION
No. Function I/O Act Description No. Function I/O Act Description
1 Vdd Power supply +5V 51 BTA17 O H Set up output terminal for BOOT ROM address.
2 STBY/RECV O L Standby / received indicator output terminal. "L" : Light on 52 BTA16 O H Set up output terminal for BOOT ROM address.
3 Not used I L Not used 53 BTA15 O H Set up output terminal for BOOT ROM address.
4 Not used I L Not used 54 Not used I L Not used
5 Not used I L Not used 55 Not used I L Not used
6 Not used I L Not used 56 Not used I L Not used
7 SDO O H Serial data output terminal for volume mode. 57 ERF I H DIR ERF signal input terminal.
8 SCK O CLK Serial clock output terminal for volume mode. 58 Not used I L Not used
9 Not used I L Not used 59 Not used I L Not used
10 RESET Reset terminal. 60 ENC1 I H Volume control input terminal.
11 X2 Main clock input terminal. 5MHz 61 ENC2 I H Volume control input terminal.
12 X1 Main clock input terminal. 5MHz 62 Not used I L Not used
13 GND Connect to the ground terminal. 63 POWER O H Power supply control output terminal.
14 XT2 Open terminal. Sub-clock input terminal. 64 FAN_HL O L FAN control terminal.
15 GND To connect to the ground. Sub-clock input terminal. 65 GAINCTL O H Gain control output terminal.
16 +5V Power supply. +5V 66 FAN_CNT O L Select terminal of FAN.
17 VOLSLT O H Strobe output terminal for electrical volume. 67 Not used I L Not used
18 Not used I L Not used 68 P17 O H Segment signal output terminal of fluorescence tube.
19 ~DSPRST O L Reset output terminal of DSP 69 P16 O H Segment signal output terminal of fluorescence tube.
20 ~DSPCS O L Chip select output terminal for DSP. 70 P15 O H Segment signal output terminal of fluorescence tube.
21 Not used I L Not used 71 P14 O H Segment signal output terminal of fluorescence tube.
22 DSPSCK O CLK Serial clock output terminal for DIR and DSP. 72 P13 O H Segment signal output terminal of fluorescence tube.
23 DSPSDO O H Serial data output terminal for DIR and DSP. 73 P12 O H Segment signal output terminal of fluorescence tube.
24 DSPSDI I H Serial data input terminal for DSP. 74 P11 O H Segment signal output terminal of fluorescence tube.
25 GND Ground terminal of A/D converter. 75 P10 O H Segment signal output terminal of fluorescence tube.
26 LEVEL_IN I A Detection input terminal for input signal. 76 P9 O H Segment signal output terminal of fluorescence tube.
27 Not used I A Not used 77 P8 O H Segment signal output terminal of fluorescence tube.
28 MODE I A Initializing input terminal for mode select. 78 P7 O H Segment signal output terminal of fluorescence tube.
29 Not used I A Not used 79 VFL Power supply terminal of fluorescence tube.
30 Not used I A Not used 80 P6 O H Segment signal output terminal of fluorescence tube.
31 THERM_IN I A Detection terminal of temperature. 81 P5 O H Segment signal output terminal of fluorescence tube.
32 Not used I A Not used 82 P4 O H Segment signal output terminal of fluorescence tube.
33 K0 I A Input key terminal. 83 P3 O H Segment signal output terminal of fluorescence tube.
34 +5V Power supply terminal of A/D converter. +5V 84 P2 O H Segment signal output terminal of fluorescence tube.
35 +5V Compare input voltage terminal for A/D converter. 85 P1 O H Segment signal output terminal of fluorescence tube.
36 SYSIN I L RI input terminal. 86 15G O H Grid signal output terminal of fluorescence tube.
37 ~POFF I L Detection power failure input terminal. 87 14G O H Grid signal output terminal of fluorescence tube.
38 Not used I L Not used 88 13G O H Grid signal output terminal of fluorescence tube.
39 ~REMIN I L Input terminal of remote controller. 89 12G O H Grid signal output terminal of fluorescence tube.
40 GND To connect to the ground terminal 90 11G O H Grid signal output terminal of fluorescence tube.
41 Not used I L Not used 91 10G O H Grid signal output terminal of fluorescence tube.
42 AMUT O H Muting output terminal for power amplifier. 92 9G O H Grid signal output terminal of fluorescence tube.
43 ~ABOOT/~INT I/O H AUTOBOOT/INTREQ mode input terminal of DSP. 93 8G O H Grid signal output terminal of fluorescence tube.
44 Not used I L Not used 94 7G O H Grid signal output terminal of fluorescence tube.
45 Not used I L Not used 95 6G O H Grid signal output terminal of fluorescence tube.
46 +5V +5V 96 5G O H Grid signal output terminal of fluorescence tube.
47 Not used I L Not used 97 4G O H Grid signal output terminal of fluorescence tube.
48 ~CODECPD O L CODEC POWER DOWN signal output terminal. 98 3G O H Grid signal output terminal of fluorescence tube.
49 ~DIRPD O L DIR POWER DOWN signal output terminal. 99 2G O H Grid signal output terminal of fluorescence tube.
50 ~DIRCS O L DIR chip select output terminal. 100 1G O H Grid signal output terminal of fluorescence tube.
A21
EXPLODED VIEW
U5 A103 A103

A19

D901
A5
Q905A U1 A29 A30
A5
P901 A17
A5
A33 A41
A103 E819
F901
A25 U4
U2
A105 T901
x4
A23
E890
U6
A101 S5 P7001
P702
A12
E889 A39

A13
S5

A9
U3
A1
A3
A12
S2
S4
A7

S3 A2
x2
S5 A35

S1

S12
S8
S14

S16

S15
S6
S17 S13

S19

S11

S18
S7
GXW-5.1

EXPLODED PARTS LIST
REF. NO. PART NO. DESCRIPTION
(AMPLIFIER SECTION)
U1 1A903558-1B NADG-7058-1B, DSP circuit PC board ass'y
U2 1A903559-1B NAAF-7059-1B, Power amplifier circuit PC board ass'y
U3 1A903560-1B NADIS-7060-1B, Display circuit PC board ass'y
U4 1A903561-1B NAAF-7061-1B, Power supply circuit PC board ass'y
U5 1A903562-1B NAETC-7062-1B, Second regulator PC board ass'y
U6 1A903521-1B NASW-7121-1B, Power switch PC board
A1 27111262 Front bracket ass'y (Clear plate + Front bracket)
A2 28141463 Cushion 45 x 5 t=2
A3 838426088 2.6TTB+8B(BC), Self-tapping screw
A4 838130088 3TTB+8B, Self-tapping screw
A7 28325683 Knob (SS)
A9 27100397 Chassis
A12 28141464 Cushion, 10 x 10 t=0.5
A13 28141465 Cushion, 20 x 20 t=0.5
A17 830440089 4TTC+8C(BC), Self-tapping screw
A19 27160485 Heat sink
A21 801433 3SMS8W.SW+14B(BC), Special screw
A23 27141788 Retainer, front
A25 27141789 Retainer, back
A29 28184805 Top cover
A30 28141462 Cushion, 180 x 5 t=1
A31 838430088 3TTB+8B(BC), Self-tapping screw
A33 ! 27300750 S-RELIEF #2271, Cord bushing
A39 27190693 KGLS-6R, Holder
A41 29362900 Label RISK
A101 27122823 Rear panel
A105 838450108 5TTB+10B(BC), Self-tapping screw
D901 ! 22380308 RS1505M or
! 22380044 RBV-1506, Diode
E819 27190541 WS-1NS, Holder
E889 24502314A D06T-12TM, Fan
E890 260208 Wire tie
E900 28141464 Cushion,10 x 10 t=0.5
F901 ! 252159 2A-UL/T-237, Fuse
P7001 2045182512 NCFC5-182512, Flexible flat cable
P702 2045222012 NCFC5-222012, Flexible flat cable
P901 ! 253279HIT AS-UC-2#18, Power cord
Q905A 801433 3SMS8W.SW+14B(BC), Special screw
R519A 801433 3SMS8W.SW+14B(BC), Special screw
T901 ! 2301513 NPT-1412D, Power transformer

(CABINET SECTION)
S1 401-GXW5SR-RL Panel, L/R 1set
S2 903-1GGXW5-SR Net ass'y,with grille cloth
S3 505GXW51 Cabinet ass'y
S4 196-GXW5-SW Cord ass'y,205/110 VH type L=280
S5 838435204 Self tapping screw,Bind head 3.5x16(BC) Tapping(A)
S6 838440204 Self tapping screw,Bind head 4x20 Tapping(A)
S7 300-F8405000 Self tapping screw,Flat head 4x50(BC) Tapping(A)
S8 305-C8402000 Self tapping screw,Cuo head 4x20(BC) S-Tite
S11 429-GXW5-SW Cushion, L=870 W=4 t=1
S12 430-NS-290 Washer,9- 5 t=1 NOTE: THE COMPONENTS IDENTIFIED BY MARK
S13 431-BGXW5-SW Absorbent sponge ARE CRITICAL FOR RISK OF FIRE AND
ELECTRIC SHOCK. REPLACE ONLY WITH
S14 436-ANS-290 Absorbent sponge,HB-08 150x100x10t PART NUMBER SPECIFIED.
S15 436-BNS-290 Absorbent sponge,HB-08 150x80x10t
S16 436-CNS-290 Absorbent sponge,HB-08 210x80x10t
S17 436-DNS-290 Absorbent sponge,HB-08 300x20x10t
S18 437-GXW5-SW Bottom leg ass'y, 15
S19 516-GXW5-SW Bottom plate ass'y
PRINTED CIRCUIT BOARD PARTS LIST
GXW-5.1
DSP CIRCUIT PC BOARD (NADG-7058-1B)
CIRCUIT NO. PART NO. DESCRIPTION CIRCUIT NO. PART NO. DESCRIPTION
ICs Sockets
Q701 22241520R2