Sanyo VHR-350ES User manual

L
FILE NO.
Service Manual Video Cassette
Recorder vHR-350Es (Northern Europe)
VHR-3S0 (New Zealand)
lviig
PAL
CONTENTS
I. DISASSEMBLY .....................................2
2. ELECTRICAL ADJUSTMENT .........................6
3. TEST POINT FOR TAPE PATH ADJUSTMENT . . . . . . . . . 14
4. 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 componentsdesignated by asymbol(A)in this schematicdiagramdesignatescom-
ponentswhose value are of special significanceto productsafety. Shouldany component
designatedby asymbolneed to be replaced, use onlythe part designatedin the Parts List.
Do not deviate from the resistance, wattage and voltage ratings shown.
NOTE:l. Patiaorder mustcontain Model Number, Pati Number and Description.
2. Substitute parts may be supplied as the service parts.
3. N.S.P.: Not available as service parts.
Please see other materials with Reference
No. given in table below.
Materials Model No. Reference No.
TP41ES, NZ 14314297,37 REFERENCE No. SM531269

M1-14207(2) li3
1. DISASSEMBLY
1-1.REMOVAL OF CABINET, MECHANISM UNIT AND MAIN BOARD
REMOVING THE CABINET PARTS (Fig. 1.1.1) REMOVING THE CP-1 PWB ASSEMBLY (Fig. 1.1.3)
1. Remove the cabinet and bottom cover by removing the After removing the cabinet pa- and the mechanism
four screws (A) and five screws (B). unit
2. Remove the front panel by removing the locks of the 1. Pull outthe TM-1 PWBAss’yfrom CN301 and CN302 while
clamps (C) using ascrewdriver, etc. and slightly rotating pressing and spreading out the four clamps (H) as shown
the bottom part in the direction of the arrow. by the arrows.
NOTE: Electrical adjustments for the this model can be 2. Remove the holder settothe opening of the chassis, while
performed with only the cabinet removed. pressing the clamp in the direction of the arrow.
3. Remove the two red screws (J). Next, remove the CP-I
REMOVING THE MECHANISM MAIN UNIT (Fig. 1.1 .2) PWB Ass’y by lifting it straight up while pressing and
After removing the cabinet pa- spreading out the two clamps (K) as shown by the
1. Remove the two screws (D), and then remove the bracket. arrows.
2. 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.
3. 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 and pushing the cassette traytothe position .
where the two screws (G) appear.
M-TEIUE-1
21[1{....
Front Panel
‘ALA ,Cabinet
-%’
I$/” (A)
v‘Main”nit
Bottom Cover
(B)
Fig. 1.1.1 _.
–2–

MII’$207,1,2Y3 m?
M- TP4/l R-2 <.,(} ;-..:i J,- ., ,;:
$@)
Tray LookLever able
Ca
Fig. 1.1.2
M-TP44R-3
M
Ie
r
$: lamps
T
Fig. 1.1.3
–3–

M1-14207(2) 3/3
TEMPORARILY SElllNG UP AND CONNECTING MAIN PWBASSEMBLY
The following is an example of how to place and connect the main PWB not requiring ajig, when repairing the
CP-1 PWB assembly (Fig. 1.1.4)
1. Place the mechanism main unit atthefixed position on the
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- 1PWB Ass’y to operate VCR by using the
remote control.
3. Place the CP-1 PWB Ass’yabovethe 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 enlarge view.
M-TP411R-4
,.
,.
11-wireFlatCable
TerminalBoard
.0
.-..,.‘1 \CP-1
‘tz 29-wire FlatCable /
CassetteHolder \\
ODening(M)
PWBks’y
/Tip (L)
MC-2 PWB
Fig. 1.1.4
w
/v: .
—- . .
–4–

L1.14271(N) 1/1
1-2. MAIN CIRCUIT BOARD LOCATIONS
.’, ,
‘Ji
,-.
!,. , rVp-1 PWB Fk3s’y
Shield Case
(Power supply part)
(On the Mechanism
:~l\-
..
Unit)
~CP-I PWB
Fig. 1.2.1
–5–

S1-14209(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/lV 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 startin9 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
Blank Tape VHS-type cassette tape
Monitor TV
2-1-2. LOCATION OF ADJUSTMENT POINTS
P1B08300F-SV2 ‘Q uo0
~-..
,.,.,
c)
0“
......
.,,
IC602 oIF Unit C
IC351 :------
IC301 ::
::
3VR351 <-i ;~
SW-P “e-’ :i
QIclll BIAS i-----~
Iclol , ,
:.....: [+)
Q
:...! 1c201 oTp;02 [----~
oTP;OI ~ ~
.1
;;
;-~ ::
VRI04 IC302 ~~ ~ ~
IC321 VRI02 DEV :,.....;
::
0~‘yJp‘c-.x’,Q’‘~::r
.....................
;P7:; >i@Tp’020;”e.’’’Y’’e?o:’?o‘p’03 ~RF Conv. !
....................
VIDEO CT321 VR103 VRIOI
OUT Vco CAR PB-Y ~
CP-I PWB (FOIL SIDE) Fig. 2.1.1 u
–6–

-
P1BOS600B-S1
+: ,:,.-~r
TP181
REC Current ‘II ~~VR182 REC-Y
TPI 83 SW-P ~
/\VR181 REC-C
TP182 ENV ~
IVP-1 IWVB ASS’Y Fig.2.1.2
NOTE:
.Self-recording means ‘Record any broadcasting or video
signal and play back the just-recorded portion-.
2-1-3. SWITCHING POSITION ADJ.
L
IMeasuring Point IMeasuring Equipment IADJ, Condition I
TP101 Oscilloscope PLAY(SP)mode
(VIDEO OUT) Test tape
TP183 (SW-P) (VHJ-0009 or
VHJ-0023)
ADJ. Location ADJ. Value
VR351 (SW-P) 6.5 Hi0.5 H
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 ‘~ becomes 6.5 H
~0.5 Has shown in Fig. 2.1.3.
WFS101
T=6.5 Hi0.5 H
IlH 0.5 HI
Front edge /-
of vertical sync signal
‘t t
Rise RF. SW. PULSE
Fig. 2.1.3
–7–
2-1-4. STILL V-LOCK ADJ.
==_tEEF
Pleasuring Point Measuring Equipment
Monitor
ADJ. Condition
Self-recording
(SP mode)
STILL mode
Blank tape
—— .——
Self-recording
(LP mode)
STILL mode
Blank tape
ADJ. Location IADJ. Value
CHANNEL (+) button The minimum vertical shake
CHANNEL (-) button
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.

V1-14207(11 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 simple adjustment of the VP-1 PWB Ass’y.
2-2-1. TEST EQUIPMENT AND STANDARDS REQUIRED
Color Bar Signal Generator PAL Color bar signel 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
IDigital 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
1
Oscilloscope Probe Input capacity: less than 25 pF (10:1)
less than 40 pF (1:1)
Covering frequency: DC -40 MHz (10:1) . . —.L—..
DC-30 MHZ(I:I)
Frequency Counter 8significant digits
Adjustment Relay Jig VHJ-0066: 7-wire flat cable for VP-1 PWB Ass’y
PAL TV TEST SIGNAL
WPV.SCS E
bite Peak
Iv Pedestal
Sync Tip
Level
Level
Level
COLOR BAR SIGNAL WAVEFORM Fig. 2.2.1
WPVSCP
(75%)
COLOR BAR PATTERN 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
WPV-TCP
COLOR BAR PAITERN (VHJ-0008) ON MONITOR TV
Fig. 2.2.4
–8–

V1-14207 (1)2/4
2-2-2. LOCATION OF ADJUSTMENT POINTS
L
P1B08600B-V1
Shield Case
@+. :/,
o
‘y~ ‘
-- ,,, ,
..— —
TP181
REC Current VR182 REC-Y
TP183 SW-P VR181 REC-C
TP182 ENV
VP-1 PWB ASS’Y Fig. 2.2.5
P1BOB300F-VV2
-{-)~.
#
‘o
uo0
;.,
:..‘..
o
~
... ,.’
.+,
IC602
IF Unit
IC301 --------
,!
o
Q
BIAS :......
Iclol
Q
7-:! Icl11
u
:’:
:...: IC201
o...
::
::
VR 104 IC302 ;~::
:: !......
:-J
o‘# ~f ~vof--c-!-l--l
oTuner
Unit
TP321
>:*,! TPI02 @[g]{@;;;~;;;&j0TP103 .....................
TPIO1 4X iRF Conv. ~
VIDEO CT321 ....................:
OUT VR103 VRIO1 Vco CAR PB-Y
CP-1 PWB (FOIL SIDE) Fig. 2.2.6
0
IC351
–9–

V1-14207(1) 3/4
2-2-3. ADJUSTMENT RELAY JIG
Connect the Flat cable end from the Cylinder Ass’y to the
VP-1 PWBASS’Y using the Relay jig to provide simple 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. If the VP-1 PWB Ass’y does
not contact, there is insufficient ground and no proper play
2-2-5. PB-Y LEVEL ADJ.
Measuring Point Measuring Equipment
TPIOI Oscilloscope
back image can be obtained.
WPV-TP4/lR VP-1 PWB ASS’Y
CJ
\
%
Relay Jig “
~3
0
Flat Cable
A~#y &\
Cylinder
-u
Fig. 2.2.7
NOTES:
●Self-recording means “Record the video signal and play
back the just-recorded portionm.
●Connect the monitor TV to the VIDEO OUTPUT terminal
(EURO-AV terminal 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
IOscilloscope II
(10:1 probe)
ADJ. Location ADJ. Value
VRI02 (AGC) 0.5 VP-P *0.025 VP-P I
1. Connect the color bar generator to the VIDEO INPUT
terminal (EURO-AV pin20).
2. Adjust VRI02 (AGC)for O.5Vp-p* 0.025Vpp as shown in
Fig. 2.2.8.
1WPV-AGC 1009’. white
%
Fig. 2.2.8
1
3
ADJ. Condition
PIAY(SP)mode
Test tape
(VHJ-0008 or
VHJ-0023)
ADJ. Location ADJ. Value
VRIOI (PB-Y) 1Vp-p f0.05 Vp-p
1. Play back atest tape in SP mode.
2. Adjust VRIOI (PB-Y) for the video luminance signal level
of 1Vp-p *0.05 Vp-p. (Refer to Fig. 2.2.9)
WFV109 bite
1Vp-p *
2.2.9
2-2-6. CARRIER SET ADJ.
~
Measuring Point Measuring Equipment AIM. Condition
11
ADJ. Location ADJ. Value
VRI03 (CAR) 3.83 MHz *0.05 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.
~
Measuring Point Measuring Equipment ADJ. Condition
1-1
ADJ. Location ADJ. Value
CT321 (VCO) 2.5 Vp-p k0.3 VP-P
1. Connect the digital voltmeter (DC range) to TP321 and
GND.
2. Adjust CT321(VCO) so that the voltage is 2.5 V*0.3 V. b
-lo–