Sanyo VM-EX400P User manual

FILE NO.
SERVICE MANUAL sq#’Y
o
8mm Camcorder
❑
✚
PAL
(VM-EX400P)
Contents
1.Disassembly ...................................................................... 2
2. Electrical ADJUSTMENT ................................................ 7
3. TROUBLESHOOTING GUIDE ..............................................26
DA OTC I [CT
,n, ,,u L,ti#
ACCESSORIES AND CABINET ............................................34
VIEWFINDER ....................................................................... 38
MECHANISM ....................................................................... 40
ELECTRICAL PARTS ........................................................... 44
CIRCUIT DIAGRAM (Refer to the separate volume)
r
PRODUCT SAFETY NOTICE
7
The components designated by asymbol (~) in this schematic diagram designates
components whose value are of special significance to product safety. Should any
component designated by asymbol need to be replaced, use only the part designated in
the Parts List, Do not deviate from the resistance, wattage, and valtage ratings shown.
VM-EX400P
(U. K.)
(Europe)
(General Area)
(Australia)
VM-EX450P
(U.K.)
VM-EX480P
(U.K.)
VM-EX550P
(U.K.)
VM-EX560P
(U.K.)
(Europe)
Please see other materials with Reference No.
given in table below.
Supplement of RS
Mechanism MECHANISM MS550024
CAUTION :Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Discard used batteries according to the manufacturer’s instructions.
NOTE :1. Parts order must contain model number, part number, and description.
2. Substitute parts may be supplied as the service parts.
3. N. S. P. :Not available as service parts.
Design and specifications are subject to change without notice.
ER22P/E, EX, GX, AER221P/E, EDX ER231P/E, EDX, EX 12605500, 02,04, 05 05700, 01 05800,02, 03 REFERENCE No. SM550038

1. DISASSEMBLY
1-1. REMOVAL OF TOP LID
(27E%?
-@Push the Eject button
@Connect the cord.
Clamp the plate spring @which is between —-“/
the cassette holder @and the top lid@
with tweezers, and then lift up the plate v/
spring @to remove the top lid @. v
1-2. REMOVAL OF CASSEITE LID AND FRONT CABINET
.~;~;)w ~..emovethecassettelid.
f
// ‘\..
@Remove the front cabinet %,- /7 )
by pulling it direction
indicated by arrow,
@Screw
\~
,’ ./
,.,.4 (,101)% (.”.. ~//
@T&s;~:,\:.&d ~
I
~screw-$
2x5(#104)
@Connecto; rs
(For VM-EX450P1480Pt550 P1560P)
–2–

1-3. REMOVAL OF CABINET ASSEMBLY (RIGHT) AND CABINET ASSEMBLY (LEFT)
---- @Screw 2x5(#104)
@Three screws 1.7 x4(#101)
I
@
‘\f
Yc.
‘-.. .
4
c
.“\.
-y
.!
,,. ,
>“;’ @Three screws
4
/’--”’ 2x5(#l 04)
“\ >,
“%3
~@Remove the cabinet
@)Three screws y~
+
assembly (left) by pulling
2x5(#104) it direction indicated by
arrow,
J
1-4. REMOVAL OF CABINET ASSEMBLY (LEIT) AND VIEWFINDER (For VM-EX550P/560P)
(D
toward the left (in
ection of the arrow),
@Screw 2x5(#104) en remove it.
@Two screws
Two screws
UXEW106)S:K)
@Cabinet (left)
XThe viewfinder cabinet is held
together by hooks, so you will
need to pull it firmly to separate it.
–3–

1-5. REMOVAL OF CABINET ASSEMBLY (LEFT) AND VIEWFINDER (For VM-EX400P/450P/480P)
@
@Cabinet (ri
@Screw
2x5(#1 04)>- \Turn it toward the left (in
Pthe direction of the arrow),
// ~
4and then remove it.
mTwo screws ~1.7 x4(#l 07) “’’’... P
‘-
......
%““‘r LX,.—,6A- --------
q~y @Cabinet (left)
“%The viewfinder cabinet is held
together by hooks, so you will
need to pull it firmly to separate it,
1-6. REMOVAL OF PW1 BOARD AND STAND ASSEMBLY
P
5,-+h@Twocon
.,, ‘-(
i?’
q
‘\
,..
----.,2
“’”\.v</
-’%K
\. \‘%/@Two screws2x5(#104)
1
J
%
/“\ +QStand assembly
0Ii
P@Two screws 1.7x 6(#103)
–4–

1-7. REMOVAL OF CAMERA BLOCK ASSEMBLY AND MECHANISM ASSEMBLY
.-
ck assembly
Slightly 10
block ass
slide it to
boss @a@Three screws
1.7 x4(#lo2)
1-8. REMOVAL OF CAMERA LENS BLOCK ANDCP1 BOARD
@Three
2x5
Ws
09)
Three screws
2x5(#104)
–5–

1-9. BOARD LOCATION
[For VM-EX400P/450P/480P]
J
\
CP1 board
AD1 board
PW2 board
VF1 board
–6–
.
—

2. ELECTRICAL ADJUSTMENT 1-2. EQUIPMENTS
.
-~~z~~’’suppy
J-4 Siemens star chart
J-5 Two color temperature VJ8-0002
conversion filter (LBA8)
J-6 Socket pull-out tool VJ8-0030
J-7 Pan head VJ8-0101
J-8 Circuit board connecting tool IVJ8-0140
IJ-9 Adjustment controller VJ8-0103
VJ8-0141
IJ-1 OIAdjustment ( - ) screwdriver IVJ8-0104
Note: J-1 Color viewer is 100-110 VAC only.
1-3. ADJUSTMENT ITEM AND ORDER
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11. 2,800K AWB adjustment ........................ . ..... ..
Oscillation frequency adjustment ........................10
PLLvoltage provisional adjustment ........................10
Hall sensor adjustment .........................................10
Lens adjustment .................................................lo
Auto iris level adjustment .......................................10
AGC level adjustment .......................................11
Ylevel adjustment ..............................................11
Chroma balance adjustment ................................11
Hue and chroma level adjustment ...........................12
5,100 KAWB adjustment .......................................12
12
12. PLLvoltage adjustment .......................................13
–7–

1-4. SETUP AND CONNECTION
1.Refer to “3. DISASSEMBLY” to remove the cabinet and NOTES:
each board.
2. Install pan head J-7 to the tripod mounting hole as shown ●Open or ground the test pin J9001 O[CAM ADJ.3],
J9001 @[CAM ADJ.1 ]and J9001 @[CAM ADJ.2] in
in the illustration below, and then carry out electrical accordance with the adjustment specification.
adjustment.
Be careful not to apply too much force to the camera. =Use the test pin J9001 @[ID] and J9001 @[GND] as the
Because the tripod mouning bracket is not secured by trigger for the oscilloscope and GND.
●The circuit board connecting tool J-9 is also used in
screws, the camera may come off the bracket. “2. VTR BLOCK ADJUSTMENT.”
3. Remove the three screws from the cabenet assembly
(right) and remove the TB1 output terminal board so that
the TV monitor can be connected. Connect the connector
of the TBI output terminal board to connector CN101 or
CN102 the CP1 board.
–8–

1-5. NOTES
1.Perform the adjustment after aging for ten minutes or
more.
2. As arule, perform the adjustment in the order as shown
in the section 1-8.
1-6. STANDARD SEITING
1.Use the 5,100K viewer for asubject.
2. Set to about 70 cm the distance from subject and adjust
with the power zoom buttons so that each picture frame
size becomes as shown below when performing the
adjustment with the gray scale and the color bar.
3. Operate the power zoom buttons so that the viewer
without chart is monitored on the whole screen when
performing the adjustment with the all white pattern.
4. Connect the equipment.
Gray scale
+-F3’”see
Color bar
1-7. ADJUSTMENT CONTROLLER
The EVR IC incorporates the non-volatile memory and the 8
bits D/A converter of 12 channels.
The adjustment controller performs the following communi-
cations with EVR IC.
They are channel designation, up/down of data (8 bits, Oto
255), reading out of the data written in the memory and
writing of the data to the memory, etc.
These operations can be performed by the key operations
of the adjustment controller.
Use the adjustment controller as described below.
@Connecting method
Turn off the power supply of the AC adaptor, then
connect test pin array J9001 of CP1 board to the
adjustment controller using the J-8 circuit board
connecting tool. (Refer to 1-4.)
@Power supply
Use the DC regulated power supply for the power supply
of the adjustment controller and connect 6to 8VDC to
the pin jack.
●Turn onloff the power supply of camera and the power
supply of the adjustment controller at the same time.
@Test pin array
Due to its small size, connect test pin array J9001 of CP1
board to the adjustment controller using the J-8 circuit
board connecting tool. The J-8 relay board is, as the
J9001, also located in the test pin array.
@Relation between the adjusting data value and EVR
IC output voltage
When setting the adjusting data value as N, and EVR IC
output voltage as V(N), the following formula is obtained.
V(N) =0.5 +3N/255
(Example): V(0) +0.5 volt,V(128) =2.0 volt,
V(255) =3.5 volt
@Note on using the adjustment controller
The correct adjusting data may be deleted by mis-
operation of the adjustment controller. The following
three items are recommended to prevent this.
1. Before performing the adjustment, note after reading
out the adjusting data (Oto 255) of each channel.
2. Note the new adjusting data every time an adjustment
of item completes.
3. Send each data to the D/A converter of each channel
by pressing AID+SEND and AID+WRT after setting
the data of all adjusting items and store each into the
memory to finish the adjustment.
(Refer to VJ8-0103 or VJ8-0141 Adjustment Controller
Instruction Manual.)
–9–

1-8. ADJUSTING SPECIFICATION
[CP1 BOARD]
“OO’kL-J
1. Oscillation Frequency Adjustment
Meaauring Point Meaeuring Equipment Condition
TP902 Frequency counter CAMERA EE
TP901 (GND) I
Subject —
—
IADJ. Location IADJ. Value I
ICT901 128.375 i0.15 kHz I
Preparation:
●Set the CAMERA EE mode by setting the POWER/
CHARGE switch to “ON”.
●Connect the color monitor to the video output terminal.
(Condition for subsequent adjustments.)
Adjusting method:
1. Adjust with CT901 so that the oscillation frequency is
28.375 &0.15 kHz.
2. PLL Voltage Provisional Adjustment
Meaeuring Point Meaeuring Equipment Condition
TP903 Digital voltmeter CAMERA EE
TP901 (GND) Subiect
No designation
ADJ. Location ADJ. Value
ICT902 12.0- 3.OVDC I
Adjusting method:
1.Adjust with CT902 to 2.0 -3.0 VDC.
3. Hall Sensor Adjustment
Meaeuring Point Meaeuring Equipment Condition
Test pin array Oscilloscope CAMERA EE
J9001 @
[ADJ. SET] I
J9001 @Subject
[ADJ. END] Siemens star (illuminance: Oto 50 Iux)
J9001 @[GND1
ADJ. Location ADJ. Value
VR931 ,VR932
Preparation:
●Short pin @and pin @of J9001.
Adjusting method:
1.When the power supply is turned on, pin @and pin @of
J9001 will be HIGH for approximately 1second, and from
then on it will be Low and Hall sensor adjustment mode
will be enabled. (The iris will be closed, and VR932
adjustment mode will be enabled.)
2. If VR932 is turned to the left, pin @of J9001 will become
Low, and if it is turned to the right, the pin will become
HIGH. If it is turned further to the right, the pin will
alternate between LOW and HIGH. Turn VR932 to the
left and then to the right until pin @is set to HIGH. After a
short while, the iris will open and both surfaces will be
visible, and VR931 adjustment mode will be enable.
3. Next, adjust VR931 in the same way as VR932 to set pin
@to HIGH. After ashort while the iris will close, and then
it will open, and check the adjusting data, if the adjusting
data is no problem, pin @is set to HIGH and adjustment
will be complete.
4. Lens Adjustment
Measuring Point
J9001 @
[ADJ. END]
J9001 @[GND]
Measuring Equipment Condition
Oscilloscope ICAMERA EE
Subject
Siemens star (from lens surface:120 +1
cm, size: more than A3, illuminance: 100
to 200 Iux)
ADJ. Location ADJ. Value
VR931 ,VR932
Preparation:
●Short pin 0, pin @l and pin @of J9001.
Adjusting method:
1. Turn on the power.
2. The DC voltage of J9001 @will change from High (4 -5
V) to Low (below 1V), and the adjustment will be
completed. (About 30 seconds)
NOTES:
●After turning the power on, it automatically focuses in 4
zooming positions shown following.
@middle =@tele =@ middle ~@ wide
●Don’t vaibrate while you adjust.
●At any zooming positions, center of the siemens star chart
must be in ascreen.
5. Auto Iris Level Adjustment
Measuring Point IMeasuring Equipment Condition
Test pin array 10scilloscope ICAMERA EE I
J9001 @I
[IRIS DET] Subject
J9001 @[GND] Gray scale (standard picture frame)
ADJ. Location ADJ. Value
EVR CH3 I500 t20 mVp-p I
Preparation:
●Short pin @and pin @of J9001.
–lo–

Adjusting method:
1.Press the RESET key once (when using VJ8-01 03).
Press the RESET key and AID key simultaneously, and
then release the RESET key first (when using VJ8-0141 ).
2. Operate the CH-UP key or the CH-DOWN key to
designate EVR CH3.
3. Operate the DATA-CENT key, DATA-UP key and DATA-
DOWN key to set the [IRIS DET.] waveform level to 500
f20 mvp-p.
4. Press the WRT key to store the adjusting data.
T
500 f20 mVp-p
L
.-
6. AGC Level Adjustment
Meaauring point IMeaauring Equipment Condition
Test pin array Oscilloscope CAMERA EE
J9001 @
[AGC. DET] Subject
J9001 @[GND] Gray scale (standard picture frame)
(Place LBA8s in front of lens)
ADJ. Location ADJ. Value
IEVR CH4 I500 f20 mVp-p I
Preparation:
●Short pin @and pin @of J9001.
Adjusting method:
1.Press the RESET key once (when using VJ8-01 03).
Press the RESET key and AID key simultaneously, and
then release the RESET key first (when using VJ8-0141 ).
2. Operate the CH-UP key or the CH-DOWN key to
designate EVR CH4.
3. Operate the DATA-CENT key, DATA-UP key and DATA-
DOWN key to set the [AGC.DET] waveform level to 500
* 20 mvp-p.
4. Press the WRT key to store the adjusting data.
T
500 f20 mVp-p
L
7. YLevel Adjustment
Meaauring Point Meaauring Equipment Condition
TP141 Oscilloscope CAMERA EE
(video output)
TP143 (GND)
~Gray scale (standard picture frame)
ADJ. Location ADJ. Value
EVR CH5 S: V=300:(740f 20)
Preparation:
●Short pin @and pin @of J9001.
Adjusting method:
1.Press the RESET key once (when using VJ8-01 03).
Press the RESET key and AID key simultaneously, and
then release the RESET key first (when using VJ8-0141 ).
2. Operate the CH-UP key or the CH-DOWN key to
designate EVR CH5.
3. Operate the DATA-CENT key, DATA-UP key and DATA-
DOWN key to set the S:Vratio to 300: (740 f20).
4. Press the WRT key to store the adjusting data.
T
v(740 f20)
-J-
S(300)
T
8. Chroma Balance Adjustment
Meaauring Point Meaauring Equipment Condition
TP141 Vectorscope CAMERA EE
(video output) I
TP143 (GND) Subject
Color bar (standard picture frame)
ADJ. Location ADJ. Value
EVR CH6 l———————
Preparation:
●Short pin @and pin @of J9001.
Adjusting method:
1.Adjust the gain and phase of the vectorscope so that the
burst becomes 75Y0.
2. Press the RESET key once (when using VJ8-01 03).
Press the RESET key and AiD key simultaneously, and
then release the RESET key first (when using VJ8-0141 ).
3. Operate the CH-UP key or the CH-DOWN key to
designate EVR CH6.
4. Operate the DATA-CENT key, DATA-UP key and DATA-
DOWN key to focus the luminance points which indicates
color vectors respectively.
●Adjust especially paying attention to the red vector.
5. Press the WRT key to store the adjusting data.
11 –

9. Hue and Chroma Level Adjustment
Measuring Point Measuring Equipment ICondition
TP141 Vectorscope ICAMERA EE
(video output) I
TP143 (GND) 1Subject I
IColor bar (standard picture frame)
(Place LBA8s in front of lens) I
ADJ. Location ADJ. Value
EVR CH7, CH8, CH9, CH1O
Preparation:
●Short pin @and pin @of J9001.
Adjusting method:
1. Press the RESET key once (when using VJ8-01 03).
Press the RESET key and AID key simultaneously, and
then release the RESET key first (when using VJ8-0141 ).
2. Press the READ key once while pressing the AID key and
read out all the EVR data.
3. Adjust the gain and phase of the vectorscope so that the
burst becomes 75’%..
4. Adjust the white balance temporarily. Designate CH11
and CH12 and match the white vector of the color bar
with the center of the vectorscope. Press the WRT key
pressing the AID key to store the temporary adjusting
data.
5. Adjust the four EVRS of CH7, CH8, CH9 and CH1O
alternately so that the luminance points which indicate
red and yellow vectors are on the points as shown in the
figure respectively.
6. Press the WRT key once while pressing the AID key to
store the adjusting data.
10. 5,1OOK AWB Adjustment
IAII white pattern
ADJ. Loc&ion ADJ. Value
EVR CH1l, CH12
Preparation:
●Short pin @and pin @of J9001.
Adjusting method:
1.Set the gain so that the burst comes to the end of the
vectorscope.
2. Press the RESET key once (when using VJ8-01 03).
Press the RESET key and AID key simultaneously, and
then release the RESET key first (when using VJ8-0141 ).
3. Press the READ key once while pressing the AID key and
read out all the EVR data.
4. Adjust two EVRS of CH11 and CH12 mutually so that the
white vector displayed luminance point is positioned on
the point as shown in the figure.
5. Press the WRT key once while pressing the AID key to
store the adjusting data,
IEVR CH7 R–YGAIN I
EVR CH8 B–YGAIN
EVR CH9 R–YMATRIX
EVR CH1 OB–YMATRIX
EVR CHI 1RCONTROL
EVRCH12 BCONTROL
11. 2,800K AWB Adjustment
All white pattern (Place two LBA8s in
front of the lens) I
ADJ. Location ADJ. Value
VR933 (R. G), VR934 (B. G)
– 12

Preparation:
●Short pin @, pin@ and pin@ of J9001.
Adjusting method:
1. Set the gain so that the burst comes to the end of the
vectorscope.
2. Adjust with the VR933 (R. G) and VR934 (B. G) so that
the white vector displayed luminance point is positioned
on the point as shown in the figure.
12. PLL Voltage Adjustment
Meaauring Point Meaauring Equipment Condition
TP903 Digital voltmeter CAMERA EE
TP901 (GND) Subject
INo designation I
ADJ. Location IADJ. Value I
CT902 12.4 fO.lVDC I
Adjusting method:
1. Turn CT902 so that the voltage of TP903 becomes 2.4 t
0.1 VDC.
NOTE:
●Perform the adjustment especially after aging for more
than ten minutes.
–13–

2. VTR BLOCK ADJUSTMENT
2-1. EQUIPMENTS 2-2. ALIGNMENT TAPE
1.
2.
3.
4.
5.
6.
7.
8.
9.
Monitor TV
Oscilloscope 2phenomena, band 10 MHz or wider, For video frequency characteristics adjustment
delay mode. (Use 10 :1probe unless otherwise speci- (WR5-6C) :Part code; 96-7995-17
fied.)
Frequency counter, Universal counter
~
For operation check (monaural)
Pattern generator with video output terminal (WR5-5CSP) :Part code; 96-7995-47
Note: One on which the chroma signal can be turned off.
Regulated power supply (WR5-9CS) :Part code; 96-7995-28
Alignment tape
MP tape
Circuit board connecting tool
Alligator clip lead wire
1
Name Contents Application
\
Video frequency 1. Recorded area Video
2. Recorded contents
characteristics (WR5-6C) RF sweep Oto 10 MHz
3. Marker 1, 3.58, 5.5, 7MHz
Frequency characteristics
adjustment
Operation check 1. Recorded area
(WR5-5CSPAVR5-9CS) 2. Recorded contents Video, audio
Color bar
Audio signal (FM) Operation check
J-8
Circuit board connecting tool
J-1 1, J-12, J-13
WR5-6C, WR5-5CSP, WR5-9CS
.
–14–

2-3. SETUP AND CONNECTION
[For VM-EX400P]
[For VM-EX45
(Video circuit adjustment pattern generator input signal connecting
J1005
m
PB RF 3
RF SW2 4
NOT USED 5
Ccmcm 6
DECK ADJ 7 100 JIF16,3V 39 ~
~}VIDEO OUTPUT
CIN 9
Y, Y+CIN 10
GND 11 )GND
GND 12
VF 5V 13
14
AUDIO R110 15
AUDIO GND 16
VIDEO OUT 17
Pattern
generator
method)
–15–

2-4. SETUP FOR ADJUSTMENT
For adjustment of the VTR section, the video signal from
the pattern generator is used as the adjustment signal.
Therefore, it is necessary that this video output signal is
within the specified level.
Confirm that the amplitude of the sync signal of the video
signal is about 0,3 Vp-p, that the amplitude of the video
section is about 0.7 Vp-p, that the amplitude of the burst
sianal is about 0.3 VD-D and is flat, and that the level ratio of
th~ burst signal and the “red” signal is 0.30:0.66.
White (100 %)
JRed
T
Approx.
0.7 Vp-p
Approx.
t
0,3 Vp-p
Horizontal sync component Burst component
(should be flat)
Approx. 0.3 Vp-p
[ADJ mode]
ADJ mode can be entered by short-circuiting pin @[GND]
and pin @[TEST] of J1 005.
However, when in CAMERA mode (POWER switch: “ON” ;
Slide the POWER/CHARGE switch upward, then CAMERA
indicator lights/Each time the Power mode button is pressed
during this time, the CAMERA indicator and PLAYER
indicator will light alternately and the mode will switch
between CAMERA mode and PLAY mode.), mode shifting
cannot be made as shown below.
[ADJ function]
●Stops the reel rotation checking operation.
.Stops the discrimination of SP/LP mode in playback
mode.
F-S7SSW-:+FFSW
............
PLAY Sw SE Sw ..**Shift more
m=m=~
STOP SW PLA’fskv y-s~g-w-!+ REwsw
............ ....retuf.n
S/S: REC start/stop button
Note: At the “+”,double-press
[::; portion first to shift amode.
2-5. ADJUSTMENT ITEM AND ORDER
[Servo/System Control Circuit]
1.Video center adjustment ..........""" "".".....""" "".""".""l7
[Video Circuit]
1.
2.
3.
4.
5.
6.
7.
Flying erase check ..........................................17
Sync AGC adjustment ....................................17
Comb filter phase adjustment ““”””””.”””””18
Comb filter level adjustment ““”””””””””””””””””. ”18
PBlineout Ylevel adjustment ..............................18
YFM carrier frequency adjustment ........................18
YFM deviation adjustment ...................................19
[Audio Circuit]
(For VM-EX400P)
1. fo adjustment ....................””. ””””””””””””.”19
(For VM-EX450P/480P/550P/560P)
1. Deviation adjustment ““”””””””””””””””””””””””””DO
2. PB separation adjustment .................................20
3. REC separation adjustment ................................20
~iewflnder Circuit]
(For VM-EX400P/450P/480P)
1. Horizontal oscillation frequency adjustment ............21
2. Viewfinder provisional adjustment .......”.. ””””” ””””21
3. Centering adjustment ””””””””””””””””””””””””””21
4. Horizontal size &viewfinder slant adjustment ...........21
5. Vertical size adjustment ...... ...............................22
6. Brightness adjustment .........................................22
7. Focus adjustment .............................................22
(For VM-EX550P/560P)
1.
2.
3.
4.
5.
6.
7.
8.
9.
LCDcommon voltage adjustment ......”. ””””” ”””””23
PLL lock adjustment .... ....................................23
Black level limit adjustment ..............................23
Brightness adjustment ....””” ””.”””””” ””””” ”””””””””””23
Contrast adjustment ........................................24
Gamma adjustment ........................................24
Color gain adjustment .....................................24
Hue Adjustment ...........................................24
White balance adjustment ““””””””””.”””””””.”””24
[PW2 Circuit] (For VM-EX550P/560P) —
1. DC-DC converter frequency adjustment ................25
2. 6.0 Vvoltage adjustment ....................................25
[Power Circuit]
1. DC-DC converter frequency adjustment .................25
2. Video/audio power supply adjustment ..................25
Note: SHIFT TRACK mode is used for Mechanism tracking
adjustment.
–16–

2-6. SERVO/SYSTEM CONTROL CIRCUIT
[CP1 BOARDI
2-7. VIDEO CIRCUIT
[CP1 BOARD]
VR351
@7
TP141
o
J1oo5
1. Video Center Adjustment
Meaauring Point
J1OO5Q(CH1)
TP141 (CH2)
Jloo5@(GND)
ADJ. Location
Meaauring Equipment ICondition
[
Oscilloscope IPlayback
Input Signal /Alignment Tape
(WR5-5CSP): For operation check
ADJ. /Check Value
1
VR351 6.5 +(),3 H1
Preparation:
●POWER switch: “ON”
●Power mode button : ‘{PIAYER”
●Short pin @and pin @of J1OO5.
Adjusting /Checking method:
1. Adiust the vertical sync signal to 6.5 Hfrom the rising
edge (or faliing edgej of the-RF SW with VR351.
RF SW
~$ L
6.5 HVertical
sync signal
/
LVR108Tp#1VRlll
TPI31O ❑VR104 @VR102TP1O5
R
VRl?!!@VRIOI ❑0
‘T~41 ~TP103
‘P(l TP143 TP132
J1OO5 o
1. Flying Erase Check
Meaauring Point Meaauring Equipment Condition
TP181 (CH1) Oscilloscope Record
TP143 (GND) Input Signal /Alignment Tape
IArbitrary I
ADJ. Location ADJ. /Check Value
Oscillation frequency: 5.5 to 8.5 MHz
Oscillation voltage: 7.0 to 10.0 Vp-p
Preparation:
●POWER switch: “ON”
●Power mode button :“PLAYER”
●Short pin @and pin @of J1OO5.
Adjusting /Checking method:
1. Confirm that the oscillation frequency is 5.5 to 8.5 MHz,
and that the oscillation voltage is 7.0 to 10.0 VP-P,
vv’’v!4°
I
11= 0.11 to O.19flsec
2. SYNC AGC Adjustment
Measuring Point Meaauring Equipment Condition
TP103 (CH1) Oscilloscope Record
TP105 (EXT) I
TP143 (GND) Input Signal /Alignment Tape
Coior bar (Y signai oniy)
ADJ. Location ADJ. /Check Value
VR101 05 +001 Vp-p
Preparation:
●POWER switch: “ON”
●Power mode button :“PLAYER”
●Short pin @and pin @of J1OO5.
—17–

Adjusting /Checking method:
1. Adjust with VR1OI to 0.5 t0.01 VP-P, Adjusting /Checking method:
1. Adjust with VR102 so that the amplitude (residual chroma
level) of greeen becomes minimum (below 25 mVp-p).
White (100 %)
1
+“+
Residual chroma level
+minimum
0.01 Vp-p
I)
3. Comb Filter Phase Adjustment
5. PB LINE OUT YLevel Adjustment
Measuring point IMeasuring Equipment ICondition I
IMeasuring Point IMeasuring Equipment Condition
TP101 (CH1) IOscilloscope IRecord I
TP105 (EXTj
TP143 (GND)
~
TP141 (CH1)
TP105 (EXT)
TP143 (GND) -(WR5-5CSP): For operation check,
ADJ. Location ADJ. /Check Value
VR111 I]color bar Dortion
ADJ. Location ADJ. /Check Value
VR108 1.00 k0.02 Vp-p
Preparation:
●POWER switch: “ON”
●Power mode button :“PIAYER”
●Short pin @, pin @, pin @and pin @of J1OO5.
Adjusting /Checking method:
1. Adjust with VR111 so that the amplitude (residual chroma
Preparation:
●POWER switch: “ON”
●Power mode button :“PLAYER”
●Short pin @and pin @of J1oO5.
Adjusting /Checking method:
1. Adjust with VR108 to 1.00 f0.02 Vp-p.
level) of green becomes minimum.
\
+
Residual chroma level
+minimum
AP7’00
I-Id
1
4. Comb Filter Level Adjustment 6. YFM Carrier Frequency Adjustment
Measuring point IMeasuring Equipment ICondition Measuring Point Measuring Equipment Condition
TP131 (CH1) Oscilloscope Record
TP143 (GND) Frequency counter
Input Signal /Alignment Tape
No signal
TP101 (CH1) IOscilloscope IRecord I
TP105 (EXTj
TP143 (GND)
~
ADJ. Location ADJ. /Check Value
VR102 ADJ. Location IADJ. /Check Value
VR103 4.39 t0.05 MHz
Preparation:
●POWER switch: “ON”
●Power mode button :“CAMERA
●Short pin @and pin @of J1OO5.
18 –
Preparation:
●POWER switch: “ON”
●Power mode button :“PLAYER”
●Short pin @, pin @, pin @and pin @of J1OO5.

Adjusting /Checking method:
1. Adjust with VR103 to 4.39 +0.05 MHz.
●If adjusted to 4.39 MHz in no signal state, the frequency
of sync tip is set to 4.20 MHz when there is asignal.
4.39 f0.05 MHz
7. YFM Deviation Adjustment
Meaauring Point
TP141 (CH1)
TP105 (EXT)
TP143 (GND) Input Signal /Alignment Tape
Color bar (Y signal only)
ADJ. Location ADJ. /Check Value
VR104 1.00 k0.05 Vp-p
Preparation:
●POWER switch: “ON”
●Power mode button :“PIAYER” and “CAMERA
●Short pin @and pin @of J1OO5.
wAn AV cord should be connected, and the video output
terminal should be terminated at 75 Q.
Adjusting /Checking method:
1. Record the color bar Ysignal.
2. Play back the recorded signal.
3. Check the playback level.
It should be within 1.00 f0.05 Vp-p.
4. When the level does not meet the specification, turn
VR104 as follows, and repeat 1. to 3.
Counterclockwise (o): When larger than specified value
Clockwise (o): When smaller than specified value
2-8. AUDIO CIRCUIT (For VM-EX400P)
[CP1 BOARD]
TP143
1. fO Adjustment
Measuring point IMeasuring Equipment Condition 1
TP261 (CH1)
TP143 (GND)
P(WR5-5CSP): For operation check
ADJ. Location ADJ. /Check Value
VR261
Preparation:
●POWER switch: “ON”
●Power mode button :“PLAYER”
Adjusting /Checking method:
1. Set the oscilloscope to AC 50 mV/div, 0.5usec/div.
2. Adjust with VR261 so that playback FM waveform has
the same amplitude in high frequency range and low
frequency range.
●Expand sweep of the time base to O.1,usec/div.
same level
–19–

2-9. AUDIO CIRCUIT (For VM-EX450P/480P/550P/560P)
[AD1 BOARD] rl
Kmm2
VR221 VR211
VR201
TP211
o
1. Deviation Adjustment
Meaauring Point Meaeuring Equipment Condition
Audio output Oscilloscope Playback
(left) terminal Input Signal /Alignment Tape
(WR5-5CSP): For operation check
(monaural)
ADJ. Location ADJ. ICheck Value
VR201 0.95-1.00 VP-P (– 7 f0.2 dBs)
Preparation:
●POWER switch :“ON”
●Power mode button :“PLAYER”
●AV iN/OUT switch :“OUT
Adjusting /Checking method:
1. Adjust with VR201 so that the output level is 0.95-1.00
Vp-p (-7 t0.2 dBs).
‘V’vvml-’”oovp-p
2. PB Separation Adjustment
IMeaauring Point IMeaauring Equipment ICondition I
Audio output
(left) terminal IDistortion meter IPlayback I
Input Signal /Alignment Tape
(WR5-9CS): For operation check
(stereo)
ADJ. Location ADJ. /Check Value
VR211 Less than 3Y.
3. REC Separation Adjustment
Meaauring Point IMeasuring Equipment Condition
TP211 IOscilloscope IRecord I
Input Signal /Alignkent Tape
External microphone jack: 1kHz,
–66.0 dBs O_/Rin-~hase)
ADJ. Location ADJ. ICheck Value
VR221 Less than 69.3 mVp-p (– 30 dBs/JIS A)
Preparation:
●POWER switch: “ON”
●Power mode button :‘{CAMERA
Adjusting /Checking method:
1. Adjust with VR221 so that the audio output level is less
than 69.3 mVp-p (- 30 dBs/JIS Aaudio corrections)
han 69.3 mVp-p
Preparation:
●POWER switch :“ON”
●Power mode button :“PIAYER”
●AV lN/OUT switch :“OUT”
Adjusting /Checking method:
1.Adjust with VR211 so that the distortion ratio of the audio
output signal is less than 3‘%0.
–20–