Sanyo VHR-330EV User manual

IFILE NO. I
Service Manual Video Cassette
Recorder VHR-330EV
(Switzerland &Austria)
VI+ R-330ES (Northern Europe)
VHR-330 (New Zealand)
liiriq
PAL
CONTENTS
1.
2.
3.
4.
DISASSEMBLY .....................................2
ELECTRICAL ADJUSTMENT .........................6
TEST POINT FOR TAPE PATH ADJUSTMENT . . . . . . . . . 14
PARTS LIST
ACCESSORIES ................................... 15
PACKING MATERIALS .............................15
CABINET &CHASSIS PARTS .......................15
MECHANISM PARTS .............................. 16
ELECTRICAL PARTS ..............................19
CIRCUIT DIAGRAMS (Refer to the separate volume)
PRODUCT SAFETY NOTICE
The components designated by a symbol ( ~ ) in thisschematic diagram designates com-
ponents whose value are of specialsignificanceto product safety. Should any component
designated by a symbol need to be replaced,use only the partdesignated in the Parts List.
Do not deviate from the resistance,wattage and voltageratingsshown.
NOTE: 1. Parts order must contain Model Number, Part Number and Description,
2. N.S.P.:Not available as service parts.
Please see other materials with Reference
No. given in table below.
Materials Model No. Reference No.
P90
Mechaniam Mechanism WM-530599
Manual ’92‘d ‘dMount MS 531206
Mechamsm
TP27EV, ES, NZ 14314264,96, 54 REFERENCE No. SM531246

M1-14207(1) 1/3
1. DISASSEMBLY
1-1.REMOVAL OF CABINET, MECHANISM UNIT AND MAIN BOARD
REMOVING THE CABINET PARTS (Fig. 1.1.1) REMOVING THE CP-I PWB ASSEMBLY (Fig. 1.1.3)
1. Remove the cabinet and bottom cover by removing the After removing the cabinet parts and mechanism unit:
four screws (A) and five screws (B). 1. Pull outthe TM-1 PWBAss’yfrom CN301 and CN302while
2. Remove the front panel by removing the locks of the pressing and spreading out the four clamps (H).
clamps (C) using ascrewdriver, etc. and slightly rotating 2. Remove theholdersettothe opening of thechassis, while
the bottom part in the direction of the arrow. pressing the clamp in the direction of the arrow.
NOTE: Electrical adjustments for the this model can be 3. Remove the two red screws (J). Next, remove the CP-1
performed with only the cabinet removed. PWB Ass’y by lifting it straight up while pressing and
spreading out the two clamps (K).
REMOVING THE MECHANISM MAIN UNIT (Fig. 1.1.2)
After removing the cabinet parts:
1.
2,
3.
Remove the two screws (D), and then remove the bracket.
Remove the 29-wire flat cable from the MC-2 PWB, and
then remove the 1l-wire flat cable from the VP-1 PWB
Ass’y.
Remove the mechanism main unit by removing the two
screws (E) and two screws (F).
Remove, as well, the two screws (G) at the cassette tray
side while pressing the tray lock lever as shown in the
enlarged view arrow to remove the lock and pushing the
cassette tray to the position where the two screws (G)
appear.
.
M-TEIIJE-1
Front Panel nit
ver
,,. ,.. ,
,!
Fig. 1.1.1 w

M-TP4/lR-2
,, ::; ,.,, ., -i
ff@)
Tray Look Lever able
Ca
Fig. 1.1.2
M.TPUIR-3
,..~<;. . ..
<,,
tteHolder
Mechanism Main Unit
PWB
Cable
!..
Cp-1 PWB ASS’Y
Clamps(K1
Chassis
TM.+DWR A..I.
!.., ,. ..”ruijy
29-wireFlatCable
Line
.&Ho’de’
Wlv Opening
Clamps
Fig. 1.1.3 1
–3–

M1-14207(1) 3/3
TEMPORARILY SEITING UP AND CONNECTING MAIN PWB ASSEMBLY
The following is an example of how to place and connect the main PWB not requiring ajig, when repairing the
CP-I PWB assembly H9.I .1.4)
1. Place themechanismmain unit atthefixed position forthe
chassis.
2. Connect the 29-wire flat cable to the MC-2 PWB ,and the
1l-wire flat cable to the VP-1 PWB Ass’y respectively.
Connect the TM-1 PWB Ass’y if necessa~.
3. Place the CP-I PWB Ass’y on top of the mechanism main
unit along the cassette holder. Insert the tip (L) of the
terminal board into the opening (M) at the side of the
chassis, as shown in the enlargement diagram to stabilize
the CP-I PWB /ks’Y.
M-TP4/l R-4
11-wireFlatCable —.
+(, -.,
I
CP-1 PWB Ass’Y
dFat:JI/cp-’’w
Tip(L)
Cassette Holder
\
Opening (M)
W&y /
MC-2 PWB
Fig. 1.1.4
.-
–4–

d
L1 14264(N) 1/1
1-2. MAIN CIRCUIT BOARD LOCATIONS
L-TP4/l R(21)
/----- Vp- 1PWB /%S’y
Shield Case
‘powers”pp’ypa”’~*~ MC-2 PWB
r
(On the Mechanism
TM-1 PWB~
c.-5m& \ / c“convener
\y/L’:uneruni’
Illustration :VHR-330E9VHR-330
L-TP4(G
~VP-1 PWB Asssy
rMC-2 PWB
(Onthe Mechanism
~RF Converter
Shield Case
‘powers””;---+ /\ ,
TM-8 PWB
Lq a&$
0
/
\
0
‘. .
#/
TM-1 PWB -.-/
Illustration :VHR-330EV
Unit)
Unit)
Fig. 1.2.1
–5–

S1 14229(N) 1/2
2. ELECTRICALADJUSTMENT —
PREPARATION
This VCR need 4basic presetting by using the menus displayed on-screen.
After all connection have been made, then follow steps 1to 4to preset the VCR.
The 4presetting steps will be displayed in sequence on TV screen. The setting are entered with the remote control.
Turn on the VCR
1. Adjusting the TV receiver to the video channel; The WELCOME screen will appear. When the video channel has been preset,
press the OK button on the remote control.
2. Language selection: Select the desired language, then press the OK button.
3. Clock setting: Using the remote control numeric buttons, enter the date and time, press the OK button.
4. Tuning control adjustments: When the channel position has been preset, press the MENU~ button.
When steps 1to 4have been finish, ready to operate the all operating mode.
2-1. SERVO CIRCUIT ADJUSTMENT
,These adjustments should be carried out upon completion of the tape transport adjustments.
●If the tape transport adjustments (except the tilt adjustment) are carried out after these adjustments, follow the procedures
again in Section 2-1-3. SWITCHING POSITION ADJ.
●When acassette tape is loaded, auto-tracking will be set immediately after starting the first playback. As this will deviate the
tracking center set, be sure to press the channel buttons (+) or (-) once directly after starting playback to prevent auto-tracking _
from being set,
2-1-1. TEST EQUIPMENT AND STANDARDS REQUIRED
Oscilloscope Vertical sensitivity: 5mV/DIV, external trigger
Band width: more than 10 MHz
Test Tape VHJ-0009 or VHJ-0023: SP mode, monoscope, 6KHz
IBlankTape IVHS-type cassette tape I
IMonitorTV I I
2-1-2. LOCATION OF ADJUSTMENT POINTS
PlB08300F-Sl/l r
‘Q
uo
~.;.’...,
$..
.....’
1IC602
..............
.............. 0
TM-8 PWB IC301 c)
IC351
u
IF Unit
.......
:~
::
::
:. {
>
O’yj‘if j’o ,!C16-’! Q“‘~:~r
...................____ ....................
T%? >(~~p1020[9j(~’’9”;:’\
VIDEO CT321 VRI03 VRIOI .....................
OUT Vco
CP-I PWB (FOIL SIDE) Fig. 2.1.1
“b
-
–6–

F,?,# “..~i>;‘i: ..-’”..“
‘“
“-’.?“.. . . ..;. .
3$,. ~.* ~,. ,-
S114264(NI 2/2
PlS08600C-Sl
Shield Case
.
0
‘J\]
u@
.- 0
.——
TP181
Recurrent
TP183 SW-P VR182RECYIC
TP182 ENV
;,
VP-1 PWB ASS’Y Fig. 2.1.2
NOTE:
.Self-recording means “Record any broadcasting or video
ksignal and play back the just-recorded portion”.
2-1-3. SWITCHING POSITION ADJ.
Measuring Point Measuring Equipment ADJ. Condition
TPIOI Oscilloscope PlAY(SP)mod5
(VIDEO OUT) Test tape
TP183 (SW-P) (VHJ-0009 or
VHJ-0023)
ADJ. Location ADJ.Value
\VR351 (SW-P) /6.5 Hf0.5H I
1. Set the tracking control position to the center by pressing
CHANNEL buttons (+) and (-) simultaneously.
(Tracking center position display in the indicator
panel “T -:- “)
2. Adjust VR351 (SW-P) so that the width “T”becomes 6.5 H
~0.5 Has shown in Fig. 2.1.3.
WFS101
T=6.5H f0.5H
vertical sync signal
tt
Rise RF. SW. PULSE
2
Fig. 2.1.3
2-1-4. STILL V-LOCK ADJ.
Measuring Point MeasuringEquipment ADJ. Condition
Picture of Color bar generator Self-recording
monitor TV or (SP mode)
Broadcasting STILL mode
Monitor Blank tape
ADJ. Location ADJ. Value
CHANNEL (+) button
CHANNEL (-) button The minimum vertical shake
1. Play back the just-recorded portion and then set the VCR
in the STILL mode.
2. Press the CHANNEL(+) button orthe CHANNEL (-) button
so that any vertical shake of the picture is brought to its
minimum.
-7–

VI 14208(N) 1/4
2-2. VIDEO CIRCUIT ADJUSTMENT
.Before making the following adjustments, Section 2-1. SERVO CIRCUIT ADJUSTMENT should be completed.
.Use the relay jig to provide simde adjustment of the VP-1 PWB Ass’y.
2-2-1. TEST EQUIPMENT AND STANDARDS REQUIRED
Color Bar Signal Generator
‘-n
PAL Color barsignei with 100% white level (EBU color barsignel)
(Signal waveform is described below. Refer to Fig. 2.2.1)
Oscilloscope Vertical sensitivity: 5mV/DIV, external trigger
Band width: more than 10 MHz
Digital Voltmeter DC range
Test Tape VHJ-0008 or VHJ-0023: SP mode, color bar, lkHz
(Color bar signal waveform is described below. Refer to Fig. 2.2.3)
Blank Tape VHS-type cassette tape -”
—I I
IOscilloscope Probe IInput capacity: less than 25 pF (10:1) I
less than 40 pF (1:1)
Covering frequency: DC -40 MHz (10:1) :X/l
.
DC-30 MHZ(I:I)
Frequency Counter 8significant digits
Adjustment Relay Jig VHJ-0065: 5-wire flat cable for VP-1 PWB Ass’y
.—
PAL TV TEST SIGNAL
WPVSCS 9
—
bitePeak
Iv Pedestal
Sync Tip
Level
Level
Level
1.S”C251
COLOR BAR SIGNAL WAVEFORM Fig. 2.2.1
COLOR BAR PAITERN MONITOR TV Fig. 2.2.2
WPV.TCS m
White
,
Iv
Vp-p
‘H.Sync Signal
COLOR BAR SIGNAL WAVEFORM (VHJ-0008)
Fig. 2.2.3
COLOR BAR PATFERN (VHJ-0008) ON MONITOR TV
Fig. 2.2.4
......”..
–8–

VI 14264(N) 2{4
2-2-2. LOCATION OF ADJUSTMENT POINTS
Iclol
c)
o
PI B08800C VI
Shield case
o
IF “
+
-- 0
.—— .,. ,
TP181
REC Curren
TP183 SW-P VR181 REC-Y/C
TP182ENV
VP- IPVW3 ASS’Y Fig. 2.2.5
PlBo8300F-vl/l
t
~
‘()
uo
~\
,.,
:.,“...
c)
o
...,,.
...
IC602
.............. 0
..........- .... IF Unit
TM-8 PWB IC351 r------
IC301
oVR351 i----- ; ;
Sw-p :,~.; : ;
QVR201 ; ;
~!A+s .......
n
;el
IC201 ....0
TP202 ;----~
●::
TP;oI ~ ~
::
... ::
:: ::
VR 104
05 ~~ J
TP321
>TPI02 Q’j+@;,@;,!dO TPI03 .....................
TP1OI .@! 4X
VIDEO cf321 VRI03 VR101 .....................
OUT Vco CAR PB-Y
CP-I PVVB (FOIL SIDE) Fig. 2.2.6
r’-’-: Icl11
:...:
–9–

V1-14207(1) 314
2-2-3. ADJUSTMENT RELAY JIG
Connect the Flat cable end from the Cylinder Ass’y to the
VP-1 PWBAss’yusingthe Relay jigtoprovidesimple repairing
and adjustment of the VP-1 PWB ASS*Y,as shown in Fig. 2.2.7.
Further, when adjusting the VP-1 PWB Ass’y, be sure to make
contact an end of Shield case with Bracket of the VP-1 PWB
Ass’yto maintain the shield effect. lfthe VP-1 PWBAss’ydoes
not contact, there is insufficient ground and no proper play
back image can be obtained.
wPv-TP4/lR vp-1 PWB ASS’Y
0
c\
\
Relay Jig o
~%
u
Flat Cabl ~“
Ass8y CG \
Cylinder
00
Fig. 2.2.7
NOTES:
.Self-recording means “Record the video signal and play
back the just-recorded portion”.
.Connect the monitor TV to the VIDEO OUTPUT terminal
(EURO-AVterminal pin 19), before making following ad-
justments.
2-2-4. AGC LEVEL ADJ.
Measuring Point Measuring Equipment ADJ. Condition
TPI02 Color bar generator E-E mode
Oscilloscope
(10:1 probe)
ADJ. Location ADJ. Value
VRI02(AGC) 0.5vpp k0.025vp-P
1. Connect the color bar generator to the VIDEO INPUT
terminal (EURO-AV pin20).
2. Adjust VR102 (AGC) forO.5Vp-pt 0.025Vp-passhown in
Fig. 2.2.8.
WPV-AGC 100?4. white
fI
b
0.5 Vp-p50.025Vp-p
!-r
,
Fig.2.2.8
2-2-5. PB-Y LEVEL ADJ.
Measuring Point
TPIOI
Measuring Equipment
Oscilloscope
ADJ. Condition
PLAY(SP)mode
Test tape
(VHJ-0008 or
VHJ-0023)
11I
ADJ. Location ADJ. Value
VRIOI (PB-Y) 1Vp-p f0.05 Vpp
1. Play back atest tape in SP mode.
2. Adjust VRIO1 (PB-Y) for the video luminance signal level
of 1Vp-p t0.05Vp-p. (Refer to Fig. 2.2.9)
WFV109 0% white
1Vp-p
1
I.-k-.--u u
k--- IH <.9.2.,.,
2-2-6. CARRIER SET ADJ.
~
Measuring Point MeasuringEquipment ADJ. Condition
II
ADJ. Location ADJ. Value
\VRI03(CAR) I3.83 MHz t0.05 MHz \
-
1. Connect the color bar generator to the VIDEO INPUT _
terminal (EURO-AV pin 20).
2. After removing the first color bar signal input from the
video input terminal, immediately adjust VRI03 (CAR) so
that the frequency becomes 3.83 MHzt 0.05 MHz.
2-2-7. VCO (on screen assist) ADJ.
MeasuringPoint Measuring Equipment ADJ. Cond@ion
TP321 Color bar generator E-E mode
Digital voltmeter
ADJ, Location ADJ. Value
CT321(VCO) 2.5 VP-Pk0.3 vpP
1. Connect the digital voltmeter (DC range) to TP321 and
GND.
2. Adjust CT321 (VCO) so that the voltage is 2.5 Vt0.3 V. -
—
-lo–