SANYO VPC-G250EX, VPC-G250E, VPC-G250 WARNING
WARNING
Do not use solder containing lead.
This product has been manufactured using lead-free solder in
order to help preserve the environment.
Because of this, be sure to use lead-free solder when carrying
out repair work, and never use solder containing lead.
Lead-free solder has a melting point that is 30 - 40°C (86 104°F) higher than solder containing lead, and moreover it does
not contain lead which attaches easily to other metals. As a
result, it does not melt as easily as solder containing lead, and
soldering will be more difficult even if the temperature of the
soldering iron is increased.
The extra difficulty in soldering means that soldering time will
increase and damage to the components or the circuit board
may easily occur.
Because of this, you should use a soldering iron and solder
that satisfy the following conditions when carrying out repair
work.
Soldering iron
Use a soldering iron which is 70 W or equivalent, and which
lets you adjust the tip temperature up to 450°C (842°F). It
should also have as good temperature recovery characteristics as possible.
Set the temperature to 350°C (662°F) or less for chip components, to 380°C (716°F) for lead wires and similar, and to 420°C
(788°F) when installing and removing shield plates.
The tip of the soldering iron should have a C-cut shape or a
driver shape so that it can contact the circuit board as flat or in
a line as much as possible.
Note:
If replacing existing solder containing lead with lead-free solder in the soldered parts of products that have been manufactured up until now, remove all of the existing solder at those
parts before applying the lead-free solder.
Solder
Use solder with the metal content and composition ratio by
weight given in the table below. Do not use solders which do
not meet these conditions.
Metal content
Composition
ratio by weight
Lead-free solder is available for purchase as a service tool.
Use the following part number when ordering:
Part name: Lead-free solder with resin (0.5 mm dia., 500 g)
Part number: VJ8-0270
Tin (Sn) Silver (Ag)
96.5 %
3.0 %
Copper (Cu)
0.5 %
– 2 –
1. OUTLINE OF CIRCUIT DESCRIPTION
1-1. CCD CIRCUIT DESCRIPTION
1. IC Configuration
The CCD peripheral circuit block basically consists of the following ICs.
IC901 (MN39727PMJ-A) CCD imager
IC932 (AN20111A) V driver
IC931 (AD9942BBCZ) CDS, AGC, A/D converter,
H driver, vertical TG
Pin 1
6
V
H
58
H
6
58
Pin 15
2. IC901 (CCD)
[Structure]
1/2.5 inch positive pixel-type color frame-reading fixed picture elements
2 channel output
Optical size 1/2.5 type format
Effective pixels 2612 (H) X 1954 (V)
Pixels in total 2728 (H) X 1966 (V)
Optical black
Horizontal (H) direction: Front 58 pixels, Rear 0 pixels
Vertical (V) direction: Front 6 pixels, Rear 6 pixels
Dummy bit number Horizontal : 28 Vertical :5
Pin No.
1, 2, 7, 8,
10, 11, 20
Symbol Pin Description
1B, V2, V3B, V4,
V
V7B, V7R, V8
Vertical register transfer clock
Fig. 1-1.Optical Black Location (Top View)
Output part 2
24
R
ø
1
2
3
4
5
6
7
8
9
10
11
12
19
20
14
18
25
13
27
28
26
VO1
VDD1
GND1
16
15
17
Horizontal shift register 1
Output part 1
21
HL
ø
Photo diode
Vertical shift register
Horizontal shift register 2
22
23
H2
H1
ø
ø
Fig. 1-2. CCD Block Diagram
Waveform
Voltag e
-6.0 V, 0 V
ø
V8
ø
V7B
ø
V7A
ø
V6
ø
V5B
ø
V5A
ø
V4
ø
V3B
ø
V3A
ø
V2
ø
V1B
ø
V1A
ø
V5R
ø
V7R
SUB
SUBSW
PT
GND
VO2
VDD2
GND2
3, 9, 12
4, 5, 19
6
13, 17, 26
14
15, 28
16, 27
18
21
22
23
25
1A, V3A, V7A Vertical register transfer clock
V
V5B, V5R, V6
5A
V
GND, GND1,
GND2
SUB
Vertical register transfer clock
Vertical register transfer clock
GND
Substrate clock
Circuit power
VOL1, VOL2
Signal output
Substrate controlSUB SW
HL
H
H
R
PT
1
2
Horizontal register transfer clock
Horizontal register transfer clock
Horizontal register transfer clock
Reset gate clock24
Protection transister bias
Table 1-1. CCD Pin Description
– 3 –
-6.0 V, 0 V, 12 V
-6.0 V, 0 V
-6.0 V, 0 V, 12 V
GND
DC
DC
0 V
Aprox. 6 V
(Different from every CCD)
12 VVDD1, VDD2
DC Aprox. 12 V
0, 3.4 V (When importing all
picture element: 3.4 V)
0 V, 3.4 V
0 V, 3.4 V
0 V, 3.4 V
4.2 V, 9.0 V
DC
-6 V
When sensor read-out
3. IC932 (V Driver)
A V driver (IC932) is necessary in order to generate the clocks
(vertical transfer clock and electronic shutter clock) which
driver the CCD.
In addition the XV1-XV8 signals which are output from IC102
are vertical transfer clocks, and the XSG signal is superimposed onto XV1, XV3, XV5 and XV7 at IC932 in order to generate a ternary pulse. In addition, the XSUB signal which is
output from IC102 is used as the sweep pulse for the electronic shutter.
VMSUB
13
OSUB
OV5R
OV7R
OV4
OV6
OV8
VM
RESET
SUBCNT
SUB
VDC
V7R
V5R
3-level
14
8
VL
41
VL
2-level
26
2-level
25
2-level
31
2-level
30
2-level
29
12
VM
37
43
Level
4
conversion
Level
5
conversion
6
Level
50
V8
conversion
Level
V6
46
conversion
Level
45
V4
conversion
Level
44
V2
conversion
Level
55
conversion
Level
54
conversion
3-level
3-level
3-level
3-level
3-level
3-level
3-level
3-level
Level
conversion
Level
conversion
Level
conversion
Level
conversion
Level
conversion
Level
conversion
Level
conversion
Level
conversion
Level
conversion
Level
conversion
Level
conversion
11
VHH
27
OV1B
28
OV1A
OV3B
22
23
OV3A
20
OV5B
21
OV5A
15
OV7B
19
OV7A
10
VH
38
VH
7
GND
62
CH8
63
CH4
3
V7
59
CH7
60
CH3
61
V5
56
CH6
57
CH2
V3
58
52
CH1
53
V1
4. IC931 (H Driver, CDS, AGC and A/D converter)
IC931 contains the functions of H driver, CDS, AGC and A/D
converter. As horizontal clock driver for CCD image sensor,
HØ1, HØ2, HØL and RG are generated inside, and output to
CCD.
The video signal which is output from the CCD is input to pin
(1) and pin (74) of IC931. There are sampling hold blocks
generated from the SHP and SHD pulses, and it is here that
CDS (correlated double sampling) is carried out.
After passing through the CDS circuit, the signal passes
through the AGC amplifier (VGA: Variable Gain Amplifier). It
is A/D converted internally into a 14-bit signal, and is then
input to MOVIC (IC102). The gain of the VGA amplifier is controlled by pins (4), (5), (6), (69), (70) and (71) serial signal
which is output from ASIC (IC101).
REFT_B
TIMING
CORE
SYNC
HD_B
REFB_B
VREF_B
VD_B
ADC
CLAMP
CLAMP
ADC
SL_A
SDATA_A
AD9942
INTERNAL
REGISTERS
SL_B
14
14
SDATA_B
DOUT_A
DOUT_B
CLI_A
CLI_B
SCK_A
SCK_B
CCDIN_A
CCDIN_B
RG_A
RG_B
H1A TO H4A
H1B TO H4B
REFT_A
REFB_A
VREF_A
CDS
CDS
4
HORIZONTAL
DRIVERS
4
VGA
0~18 dB
0~18 dB
VGA
INTERNAL CLOCKS
PRECISION
GENERATOR
VD_A
HD_A
Fig. 1-4. IC931 Block Diagram
Fig. 1-3. IC932 Block Diagram
– 4 –
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