Sony HCD-GT55 Service Manual

HCD-GT22/GT44/GT55
2525
HCD-GT22/GT44/GT55
7-3. BLOCK DIAGRAM – AMP Section –
OUT
BUFFER
IC251
C
BASS AGC
E
SW OUT
D
POWER AMP
MUTING
Q251
OVER LOAD
DETECT
Q441
OVER LOAD
DETECT
Q501
R-CH
MUTING
Q272
BUFFER
Q121
LINE AMP
IC252
STANDBY SWITCH
Q489
DC DETECT
Q481, 482
IC441 (GT22/GT55)
IC441 (GT44)
+
+
TEMPERATURE
DETECT
Q483, 484
TEMPERATURE
DETECT
Q503, 507
R-CH
R-CH
R-CH
TH441
+
++
POWER AMP
IC501
MUTING
CONTROL SWITCH
Q261
O-SYS-MUTE
1
O-STK-MUTE
36
O-SWR
2
+
R-CH
PROTECTOR
Q485
RELAY DRIVE
Q486, 488 (GT22)
Q480, 486, 488 (GT44/GT55)
+
PROTECT
DETECT
Q487
FAN MOTOR
DRIVE
Q043 – 045
FAN MOTOR
DETECT
Q046
RY441
B
HP IN
F
PROTECT
–1
–2
R
L
+
–
–
+
RY501
D037
M
M001
(FAN)
SPEAKER
PHONES
JK441
+
–
SUB WOOFER OUT
JK501
RELAY DRIVE
Q502
SUB WOOFER
SWITCH
Q274
R-CH
AUDIO+9V
J803
SYSTEM CONTROLLER
IC901 (3/4)
: TUNER (FM/AM)
SIGNAL PATH
R-ch is omitted due to same as L-ch.
DC DETECT
Q505, 506
(GT44/GT55)
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TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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Sony HCD-GT55 Specifications

General

Audio Channels	2.0
CD Player	Yes
Radio Tuner	FM/AM
USB Port	Yes
USB Playback	Yes
Equalizer	Yes
Bass Boost	Yes
Remote Control	Yes
Playable Media	CD, CD-R, CD-RW
Preset Stations	30
Audio Input	AUX
Type	Mini Hi-Fi System
Speaker Type	2-way