Sony DVP-FX94 / DVP-FX950 / DVP-FX950WM / DVP-FX955 Service Manual ▷ View online
Pin Number
Name
I/O
Description
51
RD5
I/O DRAM data 5
52
RD6
I/O DRAM data 6
53
RD7
I/O DRAM data 7
54
DVDSD18
- 1.8V power pin for internal digital circuitry
55
DQM0
I/O Data mask 0
56
RD15
I/O DRAM data 15
57
RD14
I/O DRAM data 14
58
RD13
I/O DRAM data 13
59
RD12
I/O DRAM data 12
60
DVSS33
- 3.3V Ground pin for internal digital circuitry
61
RD11
I/O DRAM data 11
62
RD10
I/O DRAM data 10
63
RD9
I/O DRAM data 9
64
RD8
I/O DRAM data 8
65
DQM1
I/O Data mask 1
66
RCLK
I/O Dram clock
67
RA11
I/O DRAM address bit 11
68
DVDD33
- 3.3V power pin for internal digital circuitry
69
RA9
I/O DRAM address 9
70
RA8
I/O DRAM address 8
71
RA7
I/O DRAM address 7
72
RA6
I/O DRAM address 6
73
RA5
I/O DRAM address 5
74
RA4
I/O DRAM address 4
75
RWE#
O DRAM Write enable, active low
76
CAS#
O DRAM column address strobe, active low
77
RAS#
O DRAM row address strobe, active low
78
BA0
I/O DRAM bank address 0
79
DVSS18
- 1.8V Ground pin for internal digital circuitry
80
BA1
I/O DRAM bank address 1
81
RA10
I/O DRAM address 10
82
RA0
I/O DRAM address 0
83
RA1
I/O DRAM address 1
84
DVDD33
- 3.3V power pin for internal digital circuitry
85
RA2
I/O DRAM address 2
86
RA3
I/O DRAM address 3
87
GPIO7/CKE
I/O Microcontroller port 1-4 (Internal Pull-Up)
88
VSTD/GPIO8
I/O Microcontroller port 1-5 (Internal Pull-Up)
89
UD/GPIO9
I GPIO9
90
DVDD18
- 1.8V power pin for internal digital circuitry
91
LR/GPIO10
O GPIO10
92
HSTR/GPIO11
I/O GPIO11
93
SPDIF/GPIO12
I/O GPIO12
94
VSTU/GPIO13
I GPIO13
95
VCK/GPIO14
I/O power pin for video/Audio Line In circuitry
96
VOE/GPIO15
I/O GPIO15
97
HOE/GPIO16
I/O GPIO16 for CHARGE LED
98
HSTL/GPIO17
I/O GPIO17 for Hold Touch Key
99
HCK/GPIO18
I/O Analog composite output
100
DACVDDC
- 3.3V power pin for video DAC circuitry
6-2
DVP-FX94/FX950/FX950WM/FX955
Pin Number
Name
I/O
Description
101
VREF
- Bandgap reference voltage
102
FS
O Full scale adjustment(suggest to use 560 ohm)
103
DACVSSC
- Ground pin for video DAC circuitry
104
CVBS
O Analog CVBS output or C
105
DACVDDB
- 3.3V power pin for video DAC circuitry
106
DACVDDA
- 3.3V power pin for video DAC circuitry
107
Y
O Y single output
108
C
O C single output
109
CVBS
O CVBS single output
110
AADVSS
- Ground pin for video DAC circuitry
111
AKIN2/GPIO19/AUDIO_MUTE
O Audio ADC input
112
ADVCM/GPIO20/VCOM
O Audio Mute
113
AKIN1/GPIO21/AUDIO_MUTE
I/O GPIO
114
AADVDD
- 3.3V power pin for 2ch audio ADC circuitry
115
APLLVDD
- 3.3V Power pin for audio clock circuitry
116
APLLCAP
I/O APLL external capacitance connection
117
ADACVSS
- Ground pin for video DAC circuitry
118
AR/GPIO0
O Audio DAC Right channel output
119
AVCM
O Audio DAC reference voltage
120
AL/GPIO1
O Audio DAC Left channel output
121
ADACVDD1
- 3.3V power pin for audio DAC circuitry
122
ADACVDD2
- 3.3V power pin for audio DAC circuitry
123
AVDD18
- Analog 1.8V power
124
AGND18
- Analog Ground
125
RFIP
I AC coupled DVD RF signal input RFIP
126
RFIN/OPOUT
I AC coupled DVD RF signal input RFIN
127
RFG/OPINP
I Main beam, RF AC input path
128
RFH/OPINN
I Main beam, RF AC input path
6-3E
DVP-FX94/FX950/FX950WM/FX955
SECTION 7
ELECTRICAL ADJUSTMENT
This section describes procedures and instructions necessary for adjusting electrical circuits in this set.
Instruments required:
1) Color monitor TV
2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz, with delay mode
3) Frequency counter (over 8 digits)
4) Digital voltmeter
5) Standard commander (RMT-D191)
6) DVD reference disc
HLX-504 (J-6090-088-A) (single layer) (NTSC)
HLX-505 (J-6090-089-A) (dual layer) (NTSC)
1. Checking Video Output Level
<Purpose>
This checks whether video output level satisfy the NTSC standard. If it is not correct, the brightness will be too large or small.
Mode
Play
Signal
Check the color-bar (100%) signal on DVD
reference disc
Measurement Point
LINE OUT (VIDEO) connector
(75 Ω terminated)
Measuring Instrument
Oscilloscope
Specification
1.00 ± 0.05 Vp-p
Checking method:
1) Confirm that the video output level is 1.00 ± 0.05 Vp-p.
7-1. STANDARD VIDEO LEVEL
DVP-FX94/FX950/FX950WM/FX955
7-1
1. When the display of LCD seems white or flicker, check the
voltage of VCOM
2. VCOM voltage regulation: The Voltage of R78
3. The voltage of VCOM: V = -1.75V ～ -1.35V
4. Use MULTIMETER for testing
5. When VCOM is not in SPEC
3. The voltage of VCOM: V = -1.75V ～ -1.35V
4. Use MULTIMETER for testing
5. When VCOM is not in SPEC
5.1 Check R72,R78 and C71
5.2 If R72,R78 and C71 are OK, check NAVDD
5.2 If R72,R78 and C71 are OK, check NAVDD
(NAVDD= -5.48V ～ -4.96V)
NAVDD comes from LCD.
If NAVDD is NG, change LCD
NAVDD comes from LCD.
If NAVDD is NG, change LCD
GND
VCOM
NAVDD
R78
1.1K/1%
R72
2.61K/1%
VCOM
NAVDD
C71
0.1uF/16V
0.1uF/16V
7-3 VCOM TEST POINT
7-2 VCOM VOLTAGE REGULATION
7-2E
DVP-FX94/FX950/FX950WM/FX955
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