Sanyo VMC-8621PA User manual

FILE NO.
REFERENCE No.SM5310561
L8MZ5/XE2,UK2,AU2
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.
SERVICE MANUAL
Colour Video Monitor
CONTENTS
SPECIFICATIONS .................................................................... 2
1. OPERATING INSTRUCTIONS ............................................. 3
2. DISASSEMBLY ..................................................................... 5
3. SERVICE ADJUSTMENTS ................................................... 6
4. PARTS LIST ......................................................................... 9
CIRCUIT DIAGRAMS & PRINTED WIRING BOARDS...........C1
(Product Code : 114 952 19)
(Europe)
VMC-8621PA
(Product Code : 114 952 20)
(U.K.)
(Product Code : 114 952 21)
(Australia)
The components designated by a symbol ( ) in this schematic diagram designates components whose value are of
special significance to product safety. Should any component designated by a symbol need to be replaced, use only the
part designated in the Parts List. Do not deviate from the resistance, wattage, and voltage ratings shown.
PRODUCT SAFETY NOTICE

– 2 –
PAL/NTSC, selected automatically
21 incht
More than 450 TV lines
S-VIDEO signal (VIDEO C)
Separate Y/C signal, mini-DIN connector (1)
Y signal: 1.0 Vp-p, 75 Ωnegative sync
C signal: 0.286 Vp-p, 75 Ωnegative sync, bridge connection possible
VIDEO signal (VIDEO A, B)
Composite sync signal: 1.0 Vp-p, 75 ΩBNC connector (2)
AUDIO signal (AUDIO A, B)
-6dBs (400 mVrms), RCA pin (3), bridge connection possible
S-VIDEO signal (VIDEO C)
Separate Y/C signal, mini-DIN connector (1)
Y signal: 1.0 Vp-p, 75 Ωnegative sync
C signal: 0.286 Vp-p, 75 Ωnegative sync, bridge connection possible
VIDEO signal (VIDEO A, B)
Composite sync signal: 1.0 Vp-p, 75 ΩBNC connector (2), automatic termination setting
AUDIO signal (AUDIO A, B)
-6dBs (400 mVrms), RCA pin (3), bridge connection possible
Picture adjustment: Adjustable COLOR, TINT (NTSC only), BRIGHTNESS, CONTRAST,
SHARPNESS
Sound adjustment: Adjustable soeaker volume
YES
1 W
x 1, impedance of 8 Ω
100 to 240 V AC, 50/60 Hz
95 Watts
-10 °C to + 45 °C storage temperature
10 % to 90 %
492 x 474 x 482 mm
29kg
SPECIFICATIONS
Colour system :
Picture tube :
Resolution :
Input terminals :
Outout terminals :
Menu screen items:
Overscan or underscan selection:
Audio output :
Speaker :
Power source :
Power consumption :
Ambient operating temperature :
Ambient operating humidity :
Dimension (W x H x D ) :
Weight :
Fig. 1
Dimensions
W
H
D

–3 –
Fig. 2
1. Speaker
When the monitor selector button (A, B or Y/C) is pressed,
the speaker lets you hear the sound from the unit which is
connected to the audio input terminals at the rear of the
monitor.
2. On-screen display button (OSD)
When this button is pressed, the menu screen appears on
the monitor screen.
3. Cursor ( ) button ( )
When this button is pressed, the cursor moves down.
When it reaches the bottom, it reappears at the top. In
addition, this button is used to make adjustment values
smaller.
4. Cursor ( ) button ( )
When this button is pressed, the cursor moves up. When
it reaches the top, it reappears at the bottom. In addition,
this button is used to make adjustment values larger.
5. Display selector button (ENTER)
If this button is pressed while a picture is on the monitor
screen, the screen changes to the adjustment screen. If
the button is pressed once more, the picture returns to the
previous screen.
6. Underscan/overscan select button (SCAN)
The initial setting is for the normal screen (overscan). If the
SCAN button is pressed, the screen will become smaller
(underscan) than the normal screen. Change this setting in
cases such as when screen display characters are miss-
ing. If the SCAN button is pressed once more, the normal
screen is display again.
7. Monitor A selector button (A)
When this button is pressed, the audio and video input
changes to the unit which is connected to the A terminals
at the rear of the monitor.
1. OPERATING INSTRUCTIONS
1-1. FRONT PANEL CONTROLS
8. Monitor B serector button (B)
When this button is pressed, the audio and video input
changes to the nuit which is connected to the B terminals
at the rear of the monitor.
9. Monitor Y/C selector button (Y/C)
When this button is pressed, the audio and video input
changes to the unit which is connected to the Y/C terminals
at the rear of the monitor.
10. Power indicator (POWER)
Lights when the power is on.
11. Power button (POWER)
Press this button to turn the power on and off.
 
1
SCAN
2 45
3
87
6
11
10
9

–4 –
Fig. 4
1-2. REAR PANEL CONTROLS & CONNECTION
1. AC INPUT socket
Connect the AC power cord (supplied) securely to this
socket and to a wall outlet.
2. Rear A terminals (AUDIO/VIDEO A terminals)
When the monitor A selector button at the front of the
monitor is pressed, the audio and video signals from the
unit which is connected to these terminals can be moni-
tored.
3. Rear B terminals (AUDIO/VIDEO B terminals)
When the monitor B selector button at the front of the
monitor is pressed, the audio and video signals from the
unit which is connected to these terminals can be moni-
tored.
4. Rear Y/C terminals (AUDIO/VIDEO Y/C
terminals)
When the monitor Y/C selector button at the front of the
monitor is pressed, the audio and video signals from the
unit which is connected to these terminals can be moni-
tored.
Note: If thre is no signal being input from the input terminals
selected (A, B or Y/C) at the rear of the monitor, "NO
SIGNAL" will be displayed.
Fig. 3
Y/C (Mini DIN 4 pin) terminal specification
Pin No. Signal
1 GND (Y)
2 GND (C)
3Y
4C
OUT
IN
4
2
3
1
4
2
3
1
1
43
2

–5 –
2. DISASSEMBLY
2-1. CABINET
2-2. BOARD LOCATION
Fig. 5
Fig. 6
VIDEO BOARD
MAIN BOARD
FUNCTION BOARD
SIGNAL BOARD

–6 –
ADJUSTMENT
ITEM
TIMING
PATTERN SETTING VR
LOCATION ADJUSTMENT PROCEDURE
CHECK B+
VOLTAGE
HOLD DOWN
VOLTAGE
SETTING
FOCUS
ADJUSTMENT
HORIZONTAL
PHASE
ADJUSTMENT
VERTICAL
LINEARY
ADJUSTMENT
VERTICAL
CENTER
ADJUSTMENT
VERTICAL
SIZE
ADJUSTMENT
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
PATTERN GENERATOR
MONOSCOPE PATTERN
TEST POINT : D910(-)
DIGITAL VOLT METER
VALUE 112.0 ±0.5 VDC.
TEST POINT : ZD501(-)
DIGITAL VOLT METER
VALUE 8.37 ±0.2 VDC.
Adjusting FBT Focus VR1,2 make focus
resolution of reach over 800TV lines, four
corners must be aiso clear.
Adjusting VR401 horizontal phase to
make right and left synmmertrize.
Adjusting VR302 vertical linear to make
up and down inear indentical.
Adjusting VR303 vertical center to make
screen up and down synmmertrize.
Adjusting VR301 vertical size to make
screen V-SIZE to level widw 3/4.
VR503
FBT FOCUS
VR
VR401
VR302
VR303
VR301
BRIGHT VR and
CONTRAST VR
TO MAX.
BRIGHT VR ,
CONTRAST VR
and
SHARPNESS
VR TO MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
BRIGHT VR ,
CONTRAST VR
and SHARP-
NESS VR TO
MAX.
FACTRY
PRESETTING
3. SERVICE ADJUSTMENTS
1. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes.
NOTE
Be sure to use a non-metallic driver for adjusting there VRs. A metallic driver can cause damage by shorting.
Adjustment tool
1. Digital multi meter
2. Pattern generator
3. Colour analyzer
Adjustment mode
Over scan mode

–7 –
ADJUSTMENT
ITEM
TIMING
PATTERN SETTING VR
LOCATION ADJUSTMENT PROCEDURE
WHITE BAL-
ANCE AD-
JUSTMENT
LUMINANCE
ADJUSTMENT
PURITY
CHECK
PATTERN GENERATOR
NO SIGNAL
PATTERN GENERATOR
MONO SCOPE
PATTERN GENERATOR
NO SIGNAL
PATTERN GENERATOR
FULL WHITE
PATTERN GENERATOR
WINDOWS PATTERN
BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.
BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.
BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.
BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.
BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.
VR801,VR803,
VR805,
FBT SCREEN
VR
VR804,VR802,
VR501
FBT SCREEN
VR
VR501
VR502
Adjust VR805 G-Bias to center.
Adjust FBT screen VR make luminance
without video to 0.6 ~ 1.0 FL.
Adjust VR801 make X value is 0.313 ±
0.015.
Adjust VR803 make Y value is 0.329 ±
0.015.
Adjust VR501 make luminance with video
signal to 38 ~ 42 FL.
Adjust VR804 make X value is 0.313 ±
0.015.
Adjust VR802 make Y value is 0.329 ±
0.015.
Adjust FBT screen VR make luminance
without video signal is 2 ~ 4 FL.
Adjust VR501 make luminance is 52 ±3
FL.
Adjust VR502 make luminance is 110 ±
10 FL.
Then make sure Full White luminance
whether it is 52 ±3 FL.
ADJUSTMENT
ITEM
TIMING
PATTERN SETTING VR
LOCATION ADJUSTMENT PROCEDURE
WHITE BAL-
ANCE AD-
JUSTMENT
and
LUMINANCE
ADJUSTMENT
PATTERN GENERATOR
NO SIGNAL
PATTERN GENERATOR
FULL WHITE
BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.
BRIGHT VR ,
CONTRAST VR
and SHARPNESS
VR TO MAX.
VR801,VR802,
VR803,VR804,
VR805,
FBT SCREEN
VR
VR804,VR802,
VR501
VR801,VR802,VR803,VR804 and VR805
is center position.
Adjust the VR801, VR803 and FBT
SCREEN VR to dark gray with screen.
Adjust the VR802 and VR804 to white
gray with screen.
Adjust the VR501 it makes the screen of
the monitor proper brightness.
The way of adjusting it which a color analyzer is not used for.

–8 –
10 987
6
5
4
3
2
1
11
12
13
T502
VR401
VR501
VR503
VR303
IC202
1
VR301 VR302
T902
VR502
VR804
VR805
VR801
VR802
VR803
Q804
Q802
Q806
F901
V-LIN
V-SIZE
V-CENTER ABL
LUMI
X-RAY H-PHASE
R-GAIN
R-BAISB-BAIS
G-BAIS
B-GAIN
D910
ZD501
IC101
1
Fig. 7
Fig. 8
MAIN BOARD
(Parts side)
VIDEO BOARD
(Parts side)

9
4. PARTS LIST
N.S.P.: Not available as service parts.
LOCATION PARTS NO. DESCRIPTION LOCATION PARTS NO. DESCRIPTION
CABINET & CHASSIS PARTS
1 645 052 5346 FRONT PANEL CM-21DXA
2 645 052 5322 DIGITAL VMC-8621P
3 645 052 5353 SPEAKER PANEL VMC-8621P
4 645 048 3493 SW KNOB 19" AA-51
5 645 048 3516 CONTROL PANEL 14" AA-51
6 645 046 6458 SW ASS’Y CH-19DXA
7 645 066 3413 FUNCTION BOARD VMC-8621P NEW
8 645 034 3605 RH W/W SCR. 3*8MM
9 645 046 4829 PH SCREW 3*8MM
10 645 046 6441 SPEAKER S9711-22NQ4171C8OHM/1W
11 645 046 4829 PH SCREW 3*8MM
12 645 046 4874 BH SCREW 3*12MM
13 645 052 5438 BRACKET RIGHT CM-21DXA
14 645 052 5445 BRACKET LEFT CM-21DXA
15 645 046 4836 PH SCREW 4*12MM
16 645 066 3178 CRT A51AEZ90X01 CPT
17 645 046 4928 RUBBER WASHERDIA20*DIA6*1T
18 645 046 4966 WASHER 6.5*19*1MM
19 645 046 4843 PH SCREW 6*12MM
20 645 052 5414 DEGAUSSING COIL CM-21DUA
21 645 055 0386 VIDEO BOARD CM-21DUA
22 645 052 5469 METAL TOP COVER CM-21DXA
23 645 034 3919 HANDLE COVER CM-14 PA-765A
24 645 034 3582 PH W/W SCR. 4*8MM
25 645 034 3841 ID LABEL 83*51MM (N.S.P.)
26 645 034 3612 SCREW+WASHER 3*6MM
27 645 066 3383 MAIN BOARD CM-21DUA NEW
28 645 046 0722 PCB GUIDE RAIL MM-9M
29 645 034 4299 PCB GUIDE RAIL MM-12A
30 645 052 5452 BASE CM-21DUA
31 645 034 3582 PH W/W SCR. 4*8MM
32 645 034 4657 FOOT PAD GL-24H
33 645 034 3926 FOOT PAD RIVET MM-12A GL-24H
34 645 046 6236 REPAIR BOTTOM CH-19DXA
35 645 046 4850 PH W/W SCR. 3*6MM
36 645 048 3585 SPACER SUPPORTS FCT-14
37 645 046 6380 SHIELDING PLATE DXA SERIES
38 645 046 6731 SIGNAL BOARD CM-21DXA
39 645 046 6373 GND PLATE DX SERIES20*13*0.5MM
40 645 046 6281 RACK PLATE CM-21DXA
41 645 046 6526 SAC SOCKET ASS’Y MM-20A
42 645 035 6216 BH SCREW 4*6MM
43 645 035 6223 WASHER OUT TEETH 4.5*8.5*0.5MM
44 645 052 5476 JACK PLATE CM-21DUA
45 645 046 4850 PH W/W SCR. 3*6MM
46 645 048 3448 HOLES COVER STCK 150*9MM AA-51
47 645 040 9226 X RADIATION 110*50MM
48 645 034 3582 PH W/W SCR. 4*8MM

10
ELECTRICAL PARTS
LOCATION PARTS NO. DESCRIPTION LOCATION PARTS NO. DESCRIPTION
Note:
1. Materials of Capacitors and Resistors are abbreviated as follows ;
Resistors Capacitors
CF RES Carbon Film Resistor MEF CAP Metallized Polyester Film Capacitor
MF RES Metal Film Resistor (Non-inductive)
MOF RES Metallized Oxide Film Resistor MEMB CAP Mini Box Metallized Polyester Capacitor
(Non-inductive)
PEI CAP Polyester Film Capacitor (Inductive)
PPN CAP Polypropylene Film Capacitor (Non-inductive)
PPS CAP Polypropylene and Metallized Polypropylene
Film Capacitor (Non-inductive)
MPP CAP Metallized Polypropylene Capacitor
(Non-inductive)
X CAP(MKP) Metallized Polypropylene Film Capacitor
(Non-inductive)
CC CAP Ceramic Capacitor
EC CAP Electrolytic Capacitor
2. N.S.P. : Not available as service parts.
SW ASS’Y CH-19DXA
645 046 6458
(MISCELLANEOUS)
SW901 645 046 5086 POWER SWITCH PS3-22SP-W4CW
645 051 0779 L/W HOUSING 1015 18AWG L=460MM
AC SOCKET ASS’Y MM-20A
645 046 6526
(MISCELLANEOUS)
645 034 3988 POWER SOCKET SS-120E
645 046 5550 L/W HOUSING B/G&Y/B 1015 18AWG
VIDEO BOARD CM-21DUA
645 055 0386
(CAPACITORS)
C801 645 055 0119 EC CAP 100UF 25V 105 DEGREE C
C803 645 046 3877 CC CAP 391PF 50V Y5P
C804 645 046 3877 CC CAP 391PF 50V Y5P
C805 645 046 3877 CC CAP 391PF 50V Y5P
C806 645 043 3139 CC CAP 103PF 1.5KV Z5U
(SEMICONDUCTORS)
Q801 645 034 3216 TR 2SC1815GR
Q802 645 040 9110 TR 2SC2688L
Q803 645 034 3216 TR 2SC1815GR
Q804 645 040 9110 TR 2SC2688L
Q805 645 034 3216 TR 2SC1815GR
Q806 645 040 9110 TR 2SC2688L
(RESISTORS)
R801 645 034 2462 MOF RES 12KOHM 3W +/-5%
R803 645 034 2141 CF RES 3.3KOHM 1/4W +/-5%
R804 645 034 2028 CF RES 220OHM 1/4W +/-5%
R805 645 034 2141 CF RES 3.3KOHM 1/4W +/-5%
R808 645 034 2141 CF RES 3.3KOHM 1/4W +/-5%
R809 645 034 2028 CF RES 220OHM 1/4W +/-5%
R810 645 034 2141 CF RES 3.3KOHM 1/4W +/-5%
R813 645 034 2141 CF RES 3.3KOHM 1/4W +/-5%
R814 645 046 2665 CF RES 360OHM 1/4W +/-5%
R815 645 034 2141 CF RES 3.3KOHM 1/4W +/-5%
R816 645 046 3235 MOF RES 220KOHM 1/2W +/-5%
R817 645 034 2462 MOF RES 12KOHM 3W +/-5%
R819 645 034 2417 MF RES 2.2KOHM 1/2W +/-1%
R824 645 034 2417 MF RES 2.2KOHM 1/2W +/-1%
R825 645 034 2462 MOF RES 12KOHM 3W +/-5%
R826 645 034 2417 MF RES 2.2KOHM 1/2W +/-1%
(VARIABLE RESISTORS)
VR801 645 046 4805 POT VR METEL 5KOHM 6DIA S TYPE
VR802 645 046 4768 POT VR METAL 300OHM6DIA S TYPE
VR803 645 046 4805 POT VR METEL 5KOHM 6DIA S TYPE
VR804 645 046 4768 POT VR METAL 300OHM6DIA S TYPE
VR805 645 046 4805 POT VR METEL 5KOHM 6DIA S TYPE
(MISCELLANEOUS)
SK801 645 040 9240 CRT SOCKET ISHM35S
SGP801 645 038 5520 SPARK GAP 250V +/-20% S TYPE
SGP802 645 038 5520 SPARK GAP 250V +/-20% S TYPE
SGP803 645 038 5520 SPARK GAP 250V +/-20% S TYPE
G2 645 034 3667 CONNECTOR BASE P235142 (N.S.P.)
GND1 645 034 3698 CONNECTOR BASE M11352 (N.S.P.)
W801 645 034 3773 CONNECTOR BASE M241855 (N.S.P.)
W802 645 034 3759 CONNECTOR BASE M241854-X (N.S.P.)
MAIN BOARD CM-21DUA NEW
645 066 3383
(CAPACITORS)
C101 645 065 0567 EC CAP 4.7UF 50V 105 DEGREE C
C102 645 034 2837 CC CAP 104PF 50V Y5V
C103 645 065 0475 EC CAP 220UF 16V 105 DEGREE C
C104 645 046 3853 CC CAP 33PF 50V Y5P
C105 645 046 3853 CC CAP 33PF 50V Y5P
C107 645 055 0096 EC CAP 10UF 50V 105 DEGREE C
C108 645 055 0096 EC CAP 10UF 50V 105 DEGREE C
C109 645 055 0096 EC CAP 10UF 50V 105 DEGREE C
C110 645 066 2690 EC CAP 330UF 16V 105 DEGREE C
C111 645 055 0096 EC CAP 10UF 50V 105 DEGREE C
C112 645 055 0096 EC CAP 10UF 50V 105 DEGREE C
C120 645 034 2967 PEI CAP .0047UF 50V +/-5%
C121 645 034 3025 MEMB CAP .22UF 63V +/-5%
C122 645 046 4287 MEMB CAP .1UF 63V +/-5%
C123 645 046 4287 MEMB CAP .1UF 63V +/-5%
C124 645 046 4287 MEMB CAP .1UF 63V +/-5%
C125 645 034 2837 CC CAP 104PF 50V Y5V
C126 645 055 0171 EC CAP 2.2UF 50V 105 DEGREE C
C127 645 034 2837 CC CAP 104PF 50V Y5V
C128 645 055 0102 EC CAP 100UF 16V 105 DEGREE C
C132 645 055 0102 EC CAP 100UF 16V 105 DEGREE C
C133 645 034 2837 CC CAP 104PF 50V Y5V
C218 645 046 4287 MEMB CAP .1UF 63V +/-5%
C219 645 046 4003 PEI CAP .022UF 100V +/-5%
C221 645 046 4287 MEMB CAP .1UF 63V +/-5%
C222 645 055 0096 EC CAP 10UF 50V 105 DEGREE C
C223 645 055 0218 EC CAP 47UF 25V 105 DEGREE C
C224 645 034 3049 MEMB CAP .47UF 63V +/-5%
C225 645 055 0096 EC CAP 10UF 50V 105 DEGREE C
C226 645 055 0171 EC CAP 2.2UF 50V 105 DEGREE C
C227 645 055 0249 EC CAP 470UF 16V 105C+/-20%
C229 645 055 0218 EC CAP 47UF 25V 105 DEGREE C
C230 645 034 2837 CC CAP 104PF 50V Y5V
C231 645 046 3983 PEI CAP .0018UF 50V +/-5%
C232 645 046 3983 PEI CAP .0018UF 50V +/-5%
C233 645 046 3952 PEI CAP .001UF 100V +/-5%
C234 645 046 3952 PEI CAP .001UF 100V +/-5%
C235 645 034 2967 PEI CAP .0047UF 50V +/-5%
C236 645 046 4287 MEMB CAP .1UF 63V +/-5%