Sony XAV-701BT / XAV-741 Service Manual ▷ View online
XAV-701BT/741
29
SECTION 4
ELECTRICAL ADJUSTMENTS
MONITOR SECTION
If any of the following parts was replaced, execute the “Flicker
Adjustment” as mentioned below.
• Liquid crystal display panel (LCD1)
• Complete DISPLAY board
Adjustment” as mentioned below.
• Liquid crystal display panel (LCD1)
• Complete DISPLAY board
1. SETTINGS
1-1. Tools and measuring devices for adjustment
1-1. Tools and measuring devices for adjustment
Note: This adjustment can be operated even if it is remote commander
which is not attached remote commander.
Tools and measuring devices
Item used
PC
(The one with serial port. The USB-
RS232C conversion is available.)
(The one with serial port. The USB-
RS232C conversion is available.)
Flicker adjustment
Communication software
(Hyper Terminal etc.)
Serial cable for RS232C
(Cross cable)
RS232-JIG OVERALL ASSY
(Part No. A-1777-380-A)
(Hyper Terminal etc.)
Serial cable for RS232C
(Cross cable)
RS232-JIG OVERALL ASSY
(Part No. A-1777-380-A)
RS232-JIG OVERALL ASSY
1-2.
Serial port setting
Please setting it as follows.
1-3. Connection with unit
Procedure:
1. Remove cover referring to “3. DISASSEMBLY (Page 13 to
Procedure:
1. Remove cover referring to “3. DISASSEMBLY (Page 13 to
28)”.
2. Insert the 5pin cable into the connector of the MAIN board
(CN501).
Note: Connect 5pin cable after removing the front panel block and DVD
mechanism deck referring to “3. DISASSEMBLY (Page 13 to 28)”.
– MAIN Board (Component Side) –
CN501
CN501
CN501
Insert the
5 pin cable of
RS-232C jig
5 pin cable of
RS-232C jig
3. The switch of RS232-JIG OVERALL ASSY is “L”.
H
moL
4. The communication software is start up.
5. Turn on the main power of unit.
5. Turn on the main power of unit.
The following log is displayed when starting while connected.
------ Test Mode 5 : HyperTerminal Start ------
Techwell Mode :
Data Read Format for Current Page: ‘r 5AB1’+[Enter]
Data Write Format for Current Page: ‘w C4D3 03’+[En-
ter]
Data Read Format for Current Page: ‘r 5AB1’+[Enter]
Data Write Format for Current Page: ‘w C4D3 03’+[En-
ter]
DAC Mode:0-vcom1_bias/1-vcom2_bias/2-vcom1_p/3-vcom2_p
Data Read Format : ‘drn’+ [Enter]
Data Write Format: ‘dwn 7D’+ [Enter]
Data Read Format : ‘drn’+ [Enter]
Data Write Format: ‘dwn 7D’+ [Enter]
Back Light Mode :
BCKL Read Format : ‘drb’+ [Enter]
BCKL Write Format: ‘dwb 7D’+ [Enter]
BCKL Read Format : ‘drb’+ [Enter]
BCKL Write Format: ‘dwb 7D’+ [Enter]
Flash Write
Save Data to Flash : ‘ds’+ [Enter]
Clear Flash Data : ‘dc’+ [Enter]
Save Data to Flash : ‘ds’+ [Enter]
Clear Flash Data : ‘dc’+ [Enter]
To Enter Test Mode : ‘ti’
To Exit Test Mode : ‘to’
To Exit Test Mode : ‘to’
To View Command ver: ‘svc’
=========== LINK OK ===========
XAV-701BT/741
30
2. FLICKER ADJUSTMENT
Note 1: Perform adjustment of NTSC/PAL separately.
Procedure:
1. The setting of “1. SETTINGS” is completed.
2. Input the NTSC or PAL white 40% raster signal from AUX2
1. The setting of “1. SETTINGS” is completed.
2. Input the NTSC or PAL white 40% raster signal from AUX2
IN jack on the rear side of main unit.
3. In the state of source off, press the [4] → [5] → [4] (keeps
pressing) button on the remote commander.
The test mode 4 starts, and the “T4” is displayed on the moni-
tor.
tor.
Screen display
4. “dr0” is input by the communication software and “Enter” key
is pressed.
The following numerical value returns from the set.
(Following characters/values are example)
dr0
VCom1_Bias :
VCom1_Bias :
0x03E901A0
Vcom1_p :
0x03E901D6
Vcom2_Bias :
0x04B00210
Vcom2_p :
0x03E901D6
5. To change the adjusted value, “dw0 ####” is input by the com-
munication software and “Enter” key is pressed.
The following numerical value returns from the set.
• NTSC adjustment
dw0
03E9####
VCom1_Bias :
0x03E9####
Vcom1_p :
0x03E901D6
Vcom2_Bias :
0x04B00210
Vcom2_p :
0x03E901D6
• PAL adjustment
dw1
04B0####
VCom1_Bias :
0x03E901A0
Vcom1_p :
0x03E901D6
Vcom2_Bias :
0x04B0####
Vcom2_p :
0x03E901D6
####: Hexadecimal (“0000” to “FFFF”)
Adjust so that the fl icker becomes minimum in the sight by ad-
justing 10 steps of hexadecimal values at a time up and down.
justing 10 steps of hexadecimal values at a time up and down.
6. “ds” is input by the communication software and “Enter” key
is pressed and the numerical value is saved.
Note
2: Change is intelligible, when it changes into the home screen.
7. The “Reset” button is pressed and turn the power off.
Example of characteristic:
Flicker
Setting value (decimal)
bad
o
m
good
XAV-701BT/741
XAV-701BT/741
31
31
If any of the following parts was replaced, perform the “IOP
Check” as mentioned below.
Check” as mentioned below.
• Optical pick-up block (chassis (OP, ZA) complete assy)
• Complete SERVO board
• Complete SERVO board
Precaution
Use the following tools and measuring devices.
• DVD test disc TDV-540C (Part No. J-2501-235-A)
• CD test disc PATD-012 (Part No. 4-225-203-01)
• Digital
Use the following tools and measuring devices.
• DVD test disc TDV-540C (Part No. J-2501-235-A)
• CD test disc PATD-012 (Part No. 4-225-203-01)
• Digital
voltmeter
• Accessory remote commander RM-X271
Note: This adjustment can be operated even if it is remote commander
which is not attached remote commander.
IOP CHECK
Connection:
Connection:
SERVO board
TP51 (IOPDVD), TP47 (IOPCD)
TP63 (D3.3V)
+
–
–
digital voltmeter
Procedure:
1. Check the IOP value of DVD and CD by label on the optical
1. Check the IOP value of DVD and CD by label on the optical
pick-up.
DVD IOP value
CD IOP value
Optical Pick-up Label:
"
2. Connect a digital voltmeter to TP51 (IOPDVD) and TP63
(D3.3V) on the SERVO board.
3. Playback the DVD test disc (TDV-540C), and make a note of
the value of digital voltmeter.
4. Divide the measured voltage value by 1, and convert it into
current value.
5. Check that the calculated value is within ±6 mA to the IOP
value given on the label.
6. Connect a digital voltmeter to TP47 (IOPCD) and TP63
(D3.3V) on the SERVO board.
7. Playback the CD test disc (PATD-012), and make a note of the
value of digital voltmeter.
8. Divide the measured voltage value by 1, and convert it into
current value.
9. Check that the calculated value is within ±6 mA to the IOP
value given on the label.
Check Location:
TP63
(D3.3V)
TP51
(IOPDVD)
TP47
(IOPCD)
– SERVO Board (Side B) –
SERVO SECTION
XAV-701BT/741
XAV-701BT/741
32
32
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM - SERVO Section -
: AUDIO
: DISC PLAY
: VIDEO
SIGNAL PATH
R-ch is omitted due to same as L-ch.
DVD PROCESSOR
IC4
SD-RAM
IC10
OPTICAL PICK-UP BLOCK
(KHS-360A)
RF+
DQ0 – DQ15
BA0
20
D/A CONVERTER
IC6
VO1F
5
VO1R
6
VO2R
9
VO2F
8
VO4R
33
VO4F
32
VO5R
36
VO5F
35
U
26
V
27
W
30
HUP
17
HUN
18
HVP
19
HVN
20
HWP
21
HWN
22
HB
23
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC1
A0 – A11
X1
27MHz
RF–
A
B
C
D
D
E
F
VR (DVD)
VR (CD)
LIMIT SW
GSW
LD (DVD)
AUTOMATIC POWER
CONTROL (FOR DVD)
Q6
LD (CD)
VC
MSW
FCS+
FCS–
FCS–
TRK+
TRK–
TRK–
SLED A+
SLED A–
SLED A–
SLED B+
SLED B–
SLED B–
COIL U
COIL V
COIL W
HALL U+
HALL U–
HALL U–
HALL V+
HALL V–
HALL V–
HALL W+
HALL W–
HALL W–
HALL_BAIS–
AUTOMATIC POWER
CONTROL (FOR CD)
Q4
43
IN1
182 FOCUS_PWM
44
IN2
184 TRACK_PWM
46
IN4
188 STA
47
IN5
187 STB
48
INSP
186 SPDL_PWM
4
96
94
STBY
DRVSB
1
FG
195
DUPRD2 for MASTER
131 FG_IN
157 RFP
158 RFN
160 A
161 B
163 C
164 D
166 E
168 F
161 B
163 C
164 D
166 E
168 F
181 DVD_LD
180 CD_LD
179 DVD_MD
178 CD_MD
111 HOMESW
173 VC
CD_DVD#
106 OP_GAIN
RAMDAT0 – RAMDAT15
RAMADD0 – RAMADD11
61
RAMBA
BA1
21
60
RAMCS0#
CLK
38
70
PCLK
CS
19
62
RAMCS1#
RAS
18
63
RAMRAS#
CAS
17
64
RAMCAS#
WE
16
67
RAMWE#
DQMH
39
68
RAMDQM
DQML
15
FLASH MEMORY
IC11
DQ0 – DQ15
WE
11
A0 – A19
MEMDAT0 – MEMDAT15
MEMADD0 – MEMADD19
22
MEMWR#
OE
28
MEMRD#
10
13
MEMCS1
A20
12
142
203
RESET#
RST
45 MECHA_Tx
56 MECHA_RESET
66 EJECT
67 LOAD
55 D_SW
194
DUPTD2 for MASTER
46 MECHA_Rx
192
SEN
57 MECHA_CTS
193
REQ
48 MECHA_RTS
LOADING
MOTOR DRIVE
IC102
52 Z_MUTE
B/U B+
M1
(LOADING)
SW1
(CHUCKING END)
SW2
(SELF)
SW3
(DISC IN)
M
53 SELF_SW
54 IN_SW
146
145
XI
XO
SYSTEM CONTROLLER
IC502 (1/3)
116
AOUT0
5 SCK
6 DATA1
114
AOUT1
11 DATA2
112
AOUT2
12 DATA3
7 BCK
8 LRCK
8 LRCK
118
AMCLK
ABCLK
ALRCLK
103
MD
4 MD
102
MC
3 MC
101
ML
2 MS
100
AMUTE
151
DAC3
27
VO1 FL
28
ZERO2
26
VO2 FR
R-CH
22
VO3 LS
19
VO6 SW
21
VO4 RS
R-CH
A/D CONVERTER
IC7
R-CH
A
FL
SL
SW
B
AIN_L
C
A_MUTE
D
16
20
16
12
104
AIN
14
VINR
13
VINL
6 SCK
9 DOUT
8 BCK
7 LRCK
7 LRCK
99
98
98
149
DAC4
152
DAC2
154
DAC1
V
Y
Y
U
VIDEO_COMP
68 DR_ON
REGULATOR
IC104
(Page 34)
(Page 33)
(Page 33)
(Page 33)
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