Read Sony HCD-GPX5G Service Manual online
SERVICE MANUAL
SUPPLEMENT-1
1
9-890-600-81
E Model
Ver. 1.1 2012.07
File this supplement with the service manual.
Subject: Addition of SERVICING NOTES (TROUBLESHOOTING)
HCD-GPX5G/GPX7G/GPX8G
HCD-GPX5G/GPX7G/GPX8G
2
SECTION 1
SERVICING NOTES
TROUBLESHOOTING
Switching Regulator Diagnosis Flow
The Output from Switching regulator is checked.
Is following power voltage up to standard?
Standby
Demo mode Power On
CN 3 1pin:
CN 2 1pin:
0V 0V
AC
IN
Ye
s
No
Ye
s
END
No
( 1
)
(2
)
(
3)
(4
)
( 5
)
(
6
)
(1) AC
input
(2) Fuse
(3) Sub Power transformer
(4) CN 3 Connector
pin1:13.5V , pin2:GND , pin3:
AC DET
, pin4: MAIN ON
pin5: SUB ON
(5) MAIN Power transformer
(6) CN 2 Connector
pin1-3: PVDD (DC+54.5V)
pin4: PVDD (DC+22V)
pin5: GND
pin6: PVDD (DC-22V)
pin7-9: PVDD (DC-54.5V)
Checks whether the state of a Cable and Outlet are normal.
If there are no problems, checks circumference circuit for
Main on/Sub on Output of Main mount side.
Replaces Switching regulator if it is not up to standard.
The Power Control signal to Switching regulator is checked.
Is following power voltage OK?
Main on/Sub on Standby
Demo mode Power On
CN 3 :4pin: Low (0V) Low (0V)
Hi (3V)
CN 3 :5pin
Low (0V) Hi (3V) Hi (3V)
7.5V±0.5V
13.5V ±0.5V
13.5V ±0.5V
54.5V ±0.5V
HCD-GPX5G/GPX7G/GPX8G
3
Optical Block Diagnosis Flow (1/2)
Does Optical pickup move to inner circumference?
(Visual check)
Yes
Yes
No
Checks 3.3V REG of DMB Mount and 1.8V REG.
Does it output the power voltage of 3.3V and 1.2V?
Checks CN801 SL+/SL- signal.
Does it output the signal?
Does Spindle motor rotate?
(Visual check)
Yes
Does Optical pickup do focus search?
(Visual check)
No
Checks circumference circuit for IC651,652 of DMB Mount.
If there are no problems, checks circumference circuit for
REG
IC of Main mount.
Yes
A
No
No
No
No
No
Checks circumference circuit for SL+/SL- of IC801.
Checks circumference circuit of IC501 FMO Signal.
REMOVE T
OP
P
ANEL
REMOVE SIDE P
ANEL
TURN ON
TRA
Y IN
The Sled motor has a problem.
Replaces BU.
Checks CN801 SP+/SP- signal.
Does it output the signal?
The Spindle motor has a problem.
Replaces BU.
Checks circumference circuit for SP+/SP of IC801.
Checks circumference circuit of IC501 DMO Signal.
Checks CN501 FCS+/FCS- signal.
Does it output the signal?
The Optical pickup has a problem.
Replaces BU.
Checks circumference circuit for FCS+/FCS- of IC801
Checks circumference circuit of IC501 FOO Signal.
Yes
Yes
Yes
HCD-GPX5G/GPX7G/GPX8G
4
Optical Block Diagnosis Flow (2/2)
Does laser diode become luminous ?
(Visual check)
Is output level of RF signal (CN507 6pin) up to standard?
RF Level = 1.05 ±0.45 Vpp
Test CD:YEDS-18
Is there no problem with Long term Aging Test (60min)?
Confirms that there is no sound skip.
END
No
No
Checks JL606 (LD780) signal.
Checks JL602 (LD650) signal.
Does it output 2V when laser become luminous?
Checks circumference circuit of Q605 or Q606.
Checks circumference circuit of IC501 LDO1 and LDO2.
The Optical pickup has a problems.
Replaces BU.
DISC IN
No
A
Is output level of RF signal(CN507 6pin) up to standard?
RF Level = 1.05 ±0.45 Vpp
Test CD:YEDS-18
Replaces BU if it is not up to standard.
No
No
If it is not up to standard,
Lens cleaning is performed.
The Optical pickup has a problems.
Replaces BU.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
