Sony MHC-GX450 Service Manual
MHC-GX450
SERVICE MANUAL
Ver. 1.1 2005.08
• MHC-GX450 is composed of following models.
As for the service manual, it is issued for each component
model, then, please refer to them.
COMPONENT MODEL NAME
MHC-GX450
COMPACT DISC DECK RECEIVER SYSTEM
FRONT SPEAKER SS-RG444
SUB WOOFER SS-WG450
PARTS LIST
Part No. Description Remarks
1-478-518-11 COMMANDER, STANDARD (RM-SC3)
1-754-094-12 ANTENNA, LOOP (AM)
1-754-243-11 ANTENNA (FM)
4-236-961-01 FOOT (FOR SPEAKER)(to Sereal No.8100000)
4-252-491-11 MANUAL, INSTRUCTION (ENGLISH)
HCD-GX450
(INCLUDING BATTERY COVER)
US Model
Canadian Model
9-877-533-02
2005H16-1
© 2005.08
4-252-491-21 MANUAL, INSTRUCTION (FRENCH)(Canadian model)
4-972-322-01 FOOT (Y)(FOR SPEAKER)(from Sereal No.8100001)
MINI Hi-Fi COMPONENT SYSTEM
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
NOTE:
• -XX, -X mean standardized parts, so they may
have some differences from the original one.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
6-1. MAIN SECTION
SECTION 6
EXPLODED VIEWS
• The mechanical parts with no reference number
in the exploded views are not supplied.
• Abbreviation
CND : Canadian model
HCD-GX450
The components identified by mark 0 or
dotted line with mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
#1
5
1
1
a
#1
#1
#1
2
b
not
3
not
supplied
supplied
4
#1
CD mechanism deck section-1
PT902
10
not
supplied
7
not
supplied
b
#1
#1
#1
#1
#1
#1
#1
8
not
supplied
9
#1
#1
#2
not
supplied
a
1
front panel
section
Main board section
not
supplied
#2
#1
12
1
#2
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
1 3-363-099-31 SCREW (CASE 3 TP2)
2 4-245-183-61 COVER (SIDE-L) (US)
2 4-245-183-71 COVER (SIDE-L) (CND)
3 4-252-196-21 DOOR, CD
4 3-038-018-01 EMBLEM, SONY
5 4-244-849-61 COVER (TOP) (US)
5 4-244-849-71 COVER (TOP) (CND)
7 1-763-117-13 FAN, DC
8 1-769-940-11 WIRE (FLAT TYPE) (11 CORE)
9 1-693-631-12 TUNER (FM/AM)
10 1-400-285-11 F-BEAD, E2515 MRT
12 4-245-184-61 COVER (SIDE-R) (US)
12 4-245-184-71 COVER (SIDE-R) (CND)
0 PT902 X-4956-292-1 TRANS ASSY, SUB
#1 7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
#2 7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3
51
HCD-GX450
d
6-2. FRONT PANEL SECTION
54
not supplied
57
not supplied
71
54
58
56
70
not supplied
59
not supplied
53
55
53
72
61
62
63
not supplied
a
68
64
54
not
supplied
59
65
not supplie
66
67
54
not supplied
not supplied
not supplied
not supplied
not supplied
52
not supplied
not supplied
54
69
not supplied
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
51 4-252-202-01 DOOR (B), CASS
52 4-252-201-01 DOOR (A), CASS
53 4-238-631-01 TAPE SPRING
54 4-951-620-01 SCREW (2.6X8), +BVTP
55 4-252-207-11 BUTTON, FF/ALBUM+
56 4-252-208-11 BUTTON, FR/ALBUM57 4-252-214-01 KNOB, VOLUME
58 X-4956-295-1 RING ASSY, KNOB
59 4-224-104-41 DAMPER
60 4-252-198-01 WINDOW, DISPLAY
61 4-231-824-01 CAM (A), HEART
62 4-231-836-01 SPRING (HEART CAM-A)
51
a
not supplied
63 4-252-195-21 PANEL, FRONT (US)
63 4-252-195-31 PANEL, FRONT (CND)
64 1-769-975-11 WIRE (FLAT TYPE) (13 CORE)
65 1-773-048-11 WIRE (FLAT TYPE) (17 CORE)
66 4-231-841-01 SPRING (HEART CAM-B)
67 4-231-825-01 CAM (B), HEART
68 4-225-252-01 CUSHION (FOOT)
69 1-796-485-51 DECK, MECHANICAL (CWM43FF-05)
70 4-252-200-01 BUTTON COVER
71 4-252-206-01 BUTTON, STOP
72 4-252-205-01 BUTTON, PLAY
52
6-3. MAIN BOARD SECTION
HCD-GX450
#2
108
not supplied
F904
F905
101
F906
108
F907
107
PT901
101
not supplied
#4
102
not supplied
#3
not supplied
107
103
104
105
106
#2
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
101 4-242-527-01 S-SCREW, ITC+4-8 R
102 A-4750-756-A AMP BOARD, COMPLETE
0 103 1-783-531-11 CORD, POWER
* 104 3-703-244-00 BUSHING (2104), CORD
105 4-988-533-01 HOLDER, PWB
106 A-4750-741-A MAIN BOARD, COMPLETE
107 4-242-539-01 BVIT 3B +3-8R W/O SLOT
108 3-905-609-41 SCREW (TRANSISTOR)
0 F904 1-576-537-11 FUSE, GLASS TUBE (DIA.5) (T8.0AL/125V)
0 F905 1-576-537-11 FUSE, GLASS TUBE (DIA.5) (T8.0AL/125V)
0 F906 1-533-451-11 FUSE, GLASS TUBE (DIA. 5) (T3.15AL/125V)
0 F907 1-533-451-11 FUSE, GLASS TUBE (DIA. 5) (T3.15AL/125V)
0 PT901 1-443-254-11 TRANSFORMER, POWER
#2 7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3
#3 7-685-872-09 SCREW +BVTT 3X8 (S)
#4 7-685-649-79 SCREW +BVTP 3X14 TYPE2 IT-3
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
53
HCD-GX450
2
6-4. CD MECHANISM DECK SECTION -1 (CDM74-F1BD81)
156
162
155
156
157
158
154
155
156
157
158
153
151
161
151
159
164
160
166
163
164
165
M741
152
CD mechanism deck section-
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
151 4-218-253-21 SCREW (M2.6), +BTTP
152 1-776-182-11 WIRE (FLAT TYPE) (5 CORE)
153 1-687-134-12 MOTOR (TB) BOARD
154 4-243-815-01 TABLE (LOADING)
155 4-245-571-02 GEAR (STOPPER)
156 4-218-252-61 SCREW (+PTPWH M2.6), FLOATING
157 4-245-570-01 GEAR (JOINT)
158 4-245-572-01 BUSHING (GEAR)
159 1-687-132-12 SENSOR BOARD
54
160 4-243-820-01 GEAR (TABLE)
161 4-243-819-01 GEAR (GENEVA)
162 4-243-816-01 TRAY
163 4-243-823-01 BELT (TABLE)
164 4-985-672-01 SCREW (+PTPWH M2.6), FLOATING
165 4-243-821-01 PULLEY (TABLE)
166 3-231-598-01 SHEET (BA)
M741 A-4723-963-A MOTOR ASSY, TABLE
6-5. CD MECHANISM DECK SECTION -2 (CDM74-F1BD81)
HCD-GX450
208
M751
211
212
210
RE701
202
207
213
206
214
205
204
216
205
215
not supplied
232
203
202
205
205
217
230
202
233
231
218
201
219
222
223
224
225
228
not supplied
229
222
232
222
223
224
220
225
205
205
223
222
223
205
226
227
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
201 1-687-135-12 DRIVER BOARD
202 4-218-253-31 SCREW (M2.6), +BTTP
203 1-687-669-12 SW BOARD
204 4-244-034-01 BELT (LOADING)
205 4-218-252-61 SCREW (+PTPWH M2.6), FLOATING
206 4-225-844-01 GEAR (LOADING A)
207 4-224-613-01 GEAR (SHAFT)
208 1-687-133-12 MOTOR (LD) BOARD
210 4-244-108-01 GEAR, SWING
211 4-224-609-01 GEAR (LOADING C)
212 4-224-608-01 COLLAR, SWING
213 3-016-533-11 WASHER (FR), STOPPER
214 4-224-611-01 GEAR (LOADING B)
215 4-224-606-01 GEAR (RV)
216 4-243-818-01 GEAR (U/D)
217 4-243-822-02 LEVER (LIFTER)
218 X-4955-707-2 PULLEY (A5) ASSY, CHUCKING
219 4-231-189-01 PULLEY (B), CHUCKING
220 X-4955-536-1 HOLDER (213) ASSY
222 4-277-549-11 INSULATOR
223 4-277-045-31 SPRING (INSULATOR), COIL
224 4-231-151-01 STOPPER (BU)
225 4-218-253-31 SCREW (M2.6), +BTTP
226 1-827-992-11 WIRE (FLAT TYPE) (16 CORE)
227 1-775-251-11 WIRE (FLAT TYPE) (27 CORE)
228 A-4751-431-A BD81A BOARD, COMPLETE
0 229 8-820-244-01 OPTICAL PICK-UP KSM-215DCP/C2NP
230 1-471-035-11 MAGNET ASSY
231 4-243-817-11 CHASSIS
232 4-951-620-01 SCREW (2.6X8), +BVTP
233 1-469-854-11 CORE, FERRITE
M751 A-4736-655-A MOTOR ASSY, LOADING
RE701 1-477-680-12 ENCODER, ROTARY
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
55
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