Mitsubishi Electric 50P-GHS63 User manual

.'
D
PROJECTION TELEVISION
GM2 CHASSIS
0
C_J
0 MODEL
50P-GHS63
CAUT IO N
Before servicing this chassis, it is important that the service person reads the "SAFETY PRECAUTIONS" in this service manual.
SPECIFICATIONS
• Cha ssi s
• Pow
er Inp ut
., Power
Consumption
•
input Terminal
:
GM2
: AC1 OOV ; 50/60Hz
:250W
RGB I
nput : O.?Vp-p 750 Straight Polarity
SYNC Input :Composite SYNC
Signai3.0~5.0Vp-p
0. ?kn Negative Polarity
• Recep
tion :Horizontal Frequency 24.39± 1.00kHz
Frequency Vertical Freq\Jency 50-70Hz
(RGB Signal)
• Operating
Temperature
• Relative
Humi
dity
• Screen Size
• Cabinet
Dimensions
• W eight
:20 %to80%
: 1016 (W) x 762 (H) /1271 (Diagonal) mm
: 1098 (W) x 1488 (H) x 698 (D) mm
:90 kg
• Weight and dimensions shown are approximate.
• Design and specifications are subject to change without notice•
.t..MITSUBISHI ELECTRIC
Copyright © 1997 Mitsubishi Electric Corporation A! I Rights Reserved.
SGW P/N: 999-0623
. ..

·~-------~~---
CONTENTS
SAFETY PRECAUTIONS •• · • · • · · · • ·, ·· · · · • · • · • ·• · • · · ·· · · · · · · •· · · · · · · · • · • · • · · ·· ·· · · · · 1
CLEANING ·• ·• •· ·· ···· ·• •• ·• •• ·• •• •· •· ·· ·• ·• ·· ·• ·· ·· ·· ·· ·· ·· ·· ·· •· ·· ·· ·• ·• ·• ·· · · 2
DEW CONDENSATION ·· · · · · · · · · · · · • · · · · ·· · · · • · • ·• •· ·· ·· · • •· · · · · ·· · · ·· · · · · · · · · · · •• · · 2
PCBs LOCATION ·· · · · · · · ·• ·· · · ·· · · ·• · · · • · • · · · · · · · • ·· · · ·· · · · · · · · · ·· · · ·· · · · · · · ·• •· · • · · 3
REMOVING FRONT AND REAR CABINET COMPONENTS •· •· · • •· · · · · •· · · •• · · ·· · · · • · · · • · · 4
LEAD DRESS · · ·· · · · · · · · • · · · • · · •• · · · · · · · • · · · · · · · · · · · · · · · · ·
·: · · · · · · · ·· · · · · ·· · • · · · · · · 5
SERVICING OF THE LENTICULAR SCREEN AND FRESNEL LENS·· ·· · • · · ·· ·· · · · · · • ·· ·· · · · · 6
CRT REPLACEMENT · · · · ·· · · · · · · · • · · · · · • ·· · · •· ·· ·• •• · · •• · • · • · · · • •• · · · • · · · · · · ·· · · · · · · 8
CIRCUIT ADJUSTMENT MODE .. •· · · ·· ·· · · •· · · .. · • · · .... ·· .. · · · · · · · · · · .. ·· .. · · ·· · · · · .. 10
LJST OF ADJUSTMENT FUNCTIONS AND ADJUSTMENT ITEMS •· · · · · · · · · · · · · · · · · · • · · · · · • 11
SETTING THE USER MODE · • •· ·• · · · · · · ·· ·· · • ·· ·· ·· · · · · · · · · · · ·· · · · · · · · · ·· · · · · ·· · · · • · • 14
SETTING THE OPTION MENU •· · • .... · · •· · · · · · · .... · · · · ·· · · · · · · · · · · · · · · ·· ·· .... ·· · • · · 14
ELECTRICAL ADJUSTMENTS
.. · · · · · • .... ·· · · · · · · .......... ·· .. ·· · · · · ·· .. ·· · · ·· ·· .. · • 15
LOCATION OF TEST POINTS AND ADJUSTMENTS·········~···························· 16
ADJUSTMENT PROCEDURES •· · · · · · · · · ·· · · · · · · · · · ·· · ·· · · · · · · · · · · · ·· · · · ·· · · ·· ·· · · · · · ·
18
DEFLECTION CIRCUIT · · · · ·· · · · · · · · · · · · · · · ·· · · · · ·· · · · · · · · · · · ·· · · · ·· · ·· · · ·· · · · •· • 18
HIGH VOLTAGE CIRCUIT •· · · ·· · · · · · · · · ·· · · · · · · ·· · ·· · ·· · · · ·· · •· •· · · ·· · · ·· · ·· · · · •· 18
CRT CIRCUIT · · · · · · · · · ·· · · · · · · · · · ·· · · · · · · · · · ·
·• · · · · · · · · · · · · ·· · · · · ·· ·· •· ·· ·· · •· · 19
DEFLECTION CIRCUIT · · · •· ·· · · · · · · · · · · · •· · · · · ·· ·· · · ·· · · · · · · · ·· ·· · · ·· · · · ••·•· · • • 20
CRT CIRCUIT · · · · · · ·· · · · · · · · · ·· · · · · · · · · · · · · · ·· · · · · · ·· · · · · · · •· · · · ·· · ·· · · ·· · ·· • · · 22
DEFLECTION CIRCUIT · ·· · · · · · · · ·•· · · · · · · · •· · · ·· · · •· · · · · •· · · · · · · ·· · ·· · · ·· · ·· · · · • 24
CONVERGENCE CIRCUIT························································ 27
SCREEN CHARACTER CIRCUIT · · · · ·· · · · · · · · · · ·· · · · · · ·· · · · · · · · · · · · ··· · · ·· ·· · · · · · · 31
CRT CIRCUIT · · · · · · · · · ·· · · · · · · · · · · · · · ·· · · · · · · ·· ·· · · · · · · · · · · · · · · ·· ·· · · ·· ·· · · · · · • 32
PARTS LIST ·· · · · · · · · · · · · • ·· •· · · · · · • · • •· •· · · ·· · · · · · · ·• · · · · · · · · · · · · · · · · · · ·· ·· · · · · •• 33
REPACKING PROCEDURE · · · · · •·· · · · •· · · · · · · ·· · · · · · ·· · · •· ·· · · · · · · · ·· · · · •· ·· •· · ·· · · · • • 33
ELECTRICAL PARTS AND OTHERS · · · · · · · · · · · · ·· · •· · · · · · · · · · · · ·· •· · ·· · ••· · · •••· ·· · · · • · 34
IC BLOCK DIAGRAMS
CIRCUIT DIAGRAMS

ISAFETY PRECAUTIONS I
NOTICE : Observe all cautions and safety related notes located inside the receiver cabinet and on the receiver chassis.
WARNING
1.Operation of this receiver outside the cabinet or with the cover removed presents a shock hazard from the receiver power
supplies. Work
on the receiver should not be attempted by anyone who is notthoroughly familiar with the precautions
necessary when working
on high-voltage equipment.
2. Do not install, remove or handle the picture tube
in any manner unless shatter-proof goggles are worn. People not so
equipped should be kept away while the picture tube is being handled. Keep the picture tube away from the body while
handling.
X-RADIATION WARNING
The surface of the picture tube may generate X-Radiation. Take precautions when servicing and, if possible, the use of a lead
apron is recommended for shielding while handling.
When replacing the picture tube, use only the designated replacement part since it
is a critical component with regard to X-
Radiation as noted above. No high-voltage adjustments are provided. The high-voltage specification is described on the cover
page.
LEAKAGE CURRENT CHECK
·-·3efore returning the receiver to the customer, it is recommended that leakage current be measured according to the following
·'"'methods. ·
1. Cold Check
With the AC plug removed from the AC source, place a jumper across the two AC plug prongs. Turn the receiver AC switch on.
Using an ohm-meter, connect one lead to the AC plug and touch the other lead to each exposed metal part (antennas, handle
bracket, metal cabinet, screwheads, metal overlays, control shafts, etc.), particularly any exposed metal part having a return
path to the chassis. Exposed metal parts having a return path to the chassis should have a minimum resistance reading of 1
megohm. Any resistance below this value indicates an abnormality which requires corrective action. Exposed metal parts not
having a return path to the chassis will indicate an open circuit.
2. Hot Check
Use the circuit in the Figure below to perform this test.
(1) With switch S1 open, connect the receiver to the measuring circuit. Immediately after connection, measure the leakage
current using both positions
of. switch S2, and with the switching devices in the receiver in all of their operating positions.
(2) Switch S1 is then closed, energizing the receiver. Immediately after closing the switch, measure the leakage current using
both positions of switch S2, and with the switching devices
in the receiver in all of their operating positions. Current
measurements of items (1) and (2) are to be repeated after the receiver has reached thermal stabilization. The leakage
current must not be more than 0.5 milliampere.
S1
(Grounding)
Open
Grounding Supply Conductor
-1-
Insulating Table
B

!CLEANINGI
Cautions when cleaning
• Since the Lenticular Screen is made of Acrylic Resin and susceptible to damage, please pay careful attention to its
~~~ .
• Do notwipe it with benzine or thinner. It might be a"cause of deterioration or removing the paint. Please follow the
instructions of a chemical cloth if you choose to use one.
Please make sure to unplug the power cord before cleaning the inside of the product because high voltage is applied to its
inside.
• Please pay careful attention not to touch the surface of the lens by hand or damage it.
Cleaning
• Please wipe it lightly with a soft cloth. When the screen is very dirty, please soak a soft cloth into a diluted mild detergent.
Wipe it and finish cleaning with a dry cloth.
• Wipe the lenticular screen along the streak.
• Clean the Fresnel Lens and Mirror or Lens with a cleaner effective for prevention of static electricity.
-1 DEW CONDENSATION I
Dew Condensation of Lens
• Dew condensation may occur on the optical unit and the picture may become unclear atthe moment when suddenly raising
room temperature.
In this case, leave it in the condition of turning on the power for 1to 2 hours to return to normal.
-2-

IPCBS LOCATION I
PCB-SENSOR
(RIGHT)
PCB-CRT
(R)
PCB-CRT (G)
PCB-CRT
(B)
I
I
I
I
I
I
I
l_
PCB-CONV SUB ' ' '-.!._
---
-
PCB-VIDEO
\ \
--
\ \ \ \
--
\ \
--
/
/
PCB-MAIN
Fig. 1
-3-
/
/
/
\
\
\
\
\
\
\
/
/
/
PCB-SENSOR (LEFT)
PCB-SENSOR (BOTTOM)
PCB-PREAMP
PCB-TERMINAL
PCB-DEFL
PCB-AFC
/
/ PCB-SYSCON
PCB-POWER SUB

I REMOVING FRONT AND REAR CABINET COMPONENTS I
Refer to PARTS LISTfor Parts Number.
Cabinet Assy
Screen Assy
Option Board
Rear Cover L
Rear
Cover Assy
Mirror Board
Handle Board
Rear Cover R Parts Name
Number of Screws
Screen Assy 2
Front Board 2
Fig. 2 Back Cover 10
Rear Cover Assy 8
Handle Board 4
Mirror Board 4
Option Board 2
Mirror 4
Rear Cover L 4
Rear Cover R 4
-4-

____ ,
ILEAD DRESS!
Note : The inner wires are clamped so that they do not come close to heat generating or high voltage parts.
After servicing route all wires
in their original position.
The Anode Lead Wires are routed so that no tensile strength applied
to the caps. If the route ofthe Anode Lead Wires are
changed, return them to the initial route.
Clamp the Lead Wires along the clamping zone with mark * shown in the figure below.
Take care so thatthe Lead Wires are not slack.
:.2C;; Optical Unit
Focus Pack
*Clamping Zone
*Hidden Clamping Zone
Aerial Clamp
• Clamping Zone shows the route of the Lead
Wire bundle the High Voltage Lead Wire and
the Lead Wire
on the primary side.
Fig.3
-5-

I SERVICING OF THE LENTICULAR SCREEN AND FRESNEL LENS I
Cautions when handling the Lenticular Screen and Fresnel Lens
1. Wear gloves when handling the Lenticular Screen and Fresnel Lens. (This prevents cuts and fingerprints.)
2. Do not place the Fresnel Lens
in the sun. (This can cause a fire and burn.)
3. Store in a dry place. (High humidity causes deformation of the Lenticular Screen and Fresnel Lens.)
Removal of the Lenticular Screen and Fresnel Lens
1. Remove 8 screws@ retaining the Screen Frame.
2. Remove the Lenticular Screen, Fresnel Lens and Monitor Glass. (Fig. 4-1)
Warm the connection portion between the Lenticular Screen and Fresnel Lens with a dryer etc. and remove
the Double
Coated Tape. (Fig. 4-2)
Screen Frame
(Top)
Screen Frame (Left)
. fi
· :r ~ Fresnel Lens
Monitor Glass
Screen Frame (Bottom)
Lenticular Screen
(i
Fig. 4-1
-6-
&
,-®
~"
Screen Cap
Screen Frame (Right)

Installation of the lenticular Screen and Fresnel Lens
1. Join the Lenticular Screen and Fresnel Lens together by applying a Double Coated Tape. (Fig. 4-2)
2. Install cushions on the Monitor Glass. (Fig. 4-3) .
Note : Bend the front side of the cushions at 1 Omm or less so as not to cover the back side.
3. Insert the Monitor Glass into the Screen Frame. (Fig. 4-4)
4. Insert the Lenticular Screen and Fresnel Lens into the Screen Frame.
5.1nstall8 screws® retaining the Screen Frame. (Fig. 4-1)
Double Coated Tape
\ I
\..__-- -_-- -_-- -~- ~~---- '_____.
Cushion
Fresnel Lens Lenticular Screen
Fig. 4-2
Screen Frame
(Top)
Double Coated Tape
IRear Side I IFront Side I
Monitor Glass
Lenticular Screen
Fresnel Lens Cushion
Screen Frame (Bottom)
Fig. 4-4
-7-
Monitor Glass
Fig. 4-3
Cushion
10mm or less

·I CRT REPLACEMENTI
Removal of the CRT
Replace the CRT one by one. Each time one CRT is replaced, energise. After roughly adjusting the focus, the middle of the
screen and convergence, replace the
CRT in sequence while confirming there is no big misconvergence on the screen.
-- ... -·
1. Remove the Rear Cover Assy. (Fig. 2)
2. Disconnectthe Anode Lead Wires from the Flyback Transformer. Contact the Anode Lead Wires with the Radiator for
Transistor to discharge the residual charge inside the
CRT. (Fig. 5-1)
3. Remove the Back Cover, Mirror Board and Option Board. (Fig. 2)
4. Remove 4
hex-nuts® retaining the Optical Unit. (Fig. 5-2)
PCB-DBF Radiator for Transistor
f PCB-MAIN
PCB-POWER SUB
Fig. S-1
LENS (B) LENS (G) LENS (R)
Front
® ®
Rear
Fig. 5-2
5. Remove 4 screws @ retaining the Lens while supporting the CRT. (Fig. 5-2)
6. Remove 4 screws © retaining the CRT while supporting the CRT. (Fig. 5-3)
_j The CRT is removable from the Optical Unit in this condition.
Note : Never loosen the colored screws and screws with spring. This can cause a leakage of cooling liquid. If the
cooling liquid should leak and stick to the surface of the Lens, wipe it with a soft cloth. If the cooling liquid should
enter into the Lens, replace it.
7. Remove the PCB-CRT, Deflection Yoke and Convergence Purity Assy (Green only).
Colored Screws
and Screws with
Spring
CRT
©
-8-
Fig. 5-3
Colored Screws and
Screws with Spring

Installation of the CRT
Note : If the cooling liquid should stick to the Lens, wipe it with a soft cloth.
Ifthe cooling liquid should enter into the inside of the Lens, replace the Lens.
1. Fix the Deflection York on the CRT neck temporarily.
2. Install the CRT on the Optical Unit. (Fig. 5-3)
3. Insert the Lens into the Optical Unit. (Fig. 5-2)
5. Install the PCB-CRTs.
4. Install the Deflection York in place. (Fig. 5-4)
6. Insert the Optical Unit into the Cabinet. (Fig. 5-2)
Focus Magnet Assy
Convergence Purity Assy
(Green only)
72mm
Fig. 5-4
CRT
Adjustment procedures after replacing the CRT
After replacing the CRT, perform the following adjustments.
1. Cut Off Adjustment
2. Centering Adjustment
3. Focus Adjustment
4. Ellipticity Adjustment
5. White I Brightness Adjustment
6. Dynamic Convergence Adjustment
Confirmation after replacing the CRT
1. Raster Size
2. Raster Distortion
-9-

·.,
ICIRCUIT ADJUSTMENT MODE I
;;,.; .........
On this model, the following adjustment items are performed
using
the remote hand unit:
Item 3 (Cut Off) -Item 5 (Raster Size)
• Item 8 (White, Brightness)
-Item 11 (Screen Character Position)
To perform these adjustments using remote hand unit, set the
product
to the circuit adjustment mode beforehand. Use the
following procedure to activate the circuit adjustment mode.
1. Change to the Circuit Adjustment Mode
1. Press the "TEST" button on the remote hand unit.
The built-in cross-hair test pattern will appear.
2. Press the
"1 ", "1 ", and "8" on the remote hand unit in that
order and change
to the circuit adjustment mode. The
display
as shown on the right will appear.
Note : Repeat the step 1 to 2 when not changing to the circuit
adjustment mode.
·'···-·""'"'2. Selection of Adjustment Functions
............ :-·-:
and Adjustment Items
To select an adjustment item in the circuit adjustment mode,
select first the adjustment function, that includes the specific
adjustment item to be selected, and next select the adjustment
item.
1. Press the "R/8" button to select an adjustment function.
Each time the button is pressed, the adjustment function
changes as follows.
rHOUR-TIMER-CONV-ATC- HR- DAC J
2. Press the "A." or "T" button on the remote hand unit to
select a specific adjustment item.
0 Press the "A." button. The adjustment Item Number
will increase.
0 Press the "Y" button. The adjustment Item Number
will decrease.
'"~. ·""'3. Changing data
1. After selecting an adjustment item, press the"~" or"~"
button to change the adjustment data.
0 Press the "-<4" button. The adjustment data will
decrease.
0 Press the"~" button. The adjustment data will
increase.
2. Press "ENTER" to save the adjustment data in memory. The
screen characters turn red for approximately 2 to 3 seconds
in this step.
4. Terminating the circuit adjustment mode
Press the "TEST'' button on the remote hand unitto terminate
the circuit adjustment mode.
Note : The circuit adjustment mode can also be terminated by
turning the power off.
-10-
TEST 1.1.8 Mode Display
Adjustment Adjustment
Function Color Frequency
Adjustment Adjustment
Item Number abbreviated
Name
Remote Hand Unit
Adjustment Data
1 8 9 10
0000
R-MUTE G·MUTE 0-MUTE
000
- PICTURE +
000

I LIST OF ADJUSTMENT FUNCTIONS AND ADJUSTMENT ITEMS I
e Replace the EEPROM saving the following adjustment data to initialize all the adjustment data. Therefore, readjust the data
indicated in the "Data" column after replacing the EEPROM Note that the data in ( ) is reference data. Perform the
ADJUSTMENT PROCEDURES given in the "Note" column.
Function Display
CONV RED : IC801 BLUE : IC802 GREEN : IC803
No. Abbreviated Adjustment Name Range Data Note
R G B Name
0 [60] 120
HSTA Horizontal Static 0-254 (127) # 9 (Raster Distortion)
1 [61] 121
VSTA Vertical Static 0-254
(127)
or# 10
2 --HPCC
[SIDE-PCC]
0-254
(127) (Dynamic Convergence)
-
62
-VPCC [T-B-PCC]
0-254 (127)
--
122 KOFS [Keystone Off
Set]
0-254
(127)
•3
63
123
TILT Horizontal Tilt 0-254
(127)
4
64
124
BOW
Horizontal Bow
0-254 (127)
5 [65]
125
VWID Vertical Height
0-254 (127)
6 [66]
126
VLIN Vertical Linearity 0-254 (127)
7 67
127 SKEW
Skew
0-254 (127)
8 68
128 . VBOW Vertical
Bow
0-254 (127)
9 [69]
129
HWID Horizontal Width 0-254
(127)
10 70 130
HLIN Horizontal Linearity
0-254 (127)
11 71
131 HSDL
Horizontal Side Linearity (L}
0-254
(127)
12
72 132 HSDR Horizontal Side Linearity (R)
0-254
(127)
13 73 .133
HISL Horizontal Inside Linearity 0-254
(127)
14 74 134 HCNL
Horizontal Left Pin Correction
0-254
(127)
15 75 135 HCNR
Horizontal Right Pin Correction
0-254
(127)
16 76
136
VCNL
Vertical Left Pin Correction
0-254
(127)
17 77 137 VCNR Vertical Right Pin Correction
0-254 (127)
18
78 138 HKLT Horizontal Keystone (Left
Top)
0-254 (127)
19 79
139
HKLB
Horizontal Keystone (Left Bottom)
0-254.
(127)
.20
80 140
HKRB
Horizontal Keystone (Right Bottom)
0-254
(127)
21 81 141 HKRT
l'iorizontal Keystone (Right Top)
0-254
(127)
22 82 142
VKLT Vertical keystone (Left Top) 0-254
(127)
23 83 143 VKLB
Vertical Keystone (Left Bottom)
0-254
(127)
-)
24 84 144
VKRB
Vertical Keystone (Right Bottom)
0-254
(127)
25 85
145
VKRT
Vertical Keystone (Right Top)
0-254 (127)
26 86
146
H03 Y3 0-254
(127)
27
-
147 H04 Y4
0-254 (127)
-
87
-H24 Horizontal Seagull Balance
0-254 (127)
28 -
148 H06 Y6
0-254 (127)
-88 -H26 X2Y6
0-254 (127)
29 89
149 H11
Horizontal Keystone
0-254 (127)
30 90
150 H12 Side PCC
0-254 (127)
31 91 151 H13 X3 Keystone
0-254 (127)
32 92 152 H14 Horizontal Seagull
0-254 (127)
33
93 153
H16 X1Y6 0-254
(127)
34 94 154 H21
Horizontal Keystone Balance
0-254
(127)
-11-

.INITIAL SET UP
1. Setting up E2RESET
Note : All the data that has already been set changes to the adjustment datawhen setting E2RESET.
CD Press the "TEST" button on the remote hand'unit. The built-in cross-hair test pattern will appear.
@ Press the "1", "1", and "9" on the remote hand unit in that order to display the Option Menu.
® Select the "E2RESET" pressing the" A" or "T" button on the remote hand unit and press "ENTER" to select "Initial".
2. Setting up Self Auto Convergence
Note : Immediately after setting up "E2RESET' as above, set up the data for "Correction Coefficient" for Self Auto
Convergence. ·
CD Supply a standard signal.
@ Press the ''TEST' button on the remote hand
unit.and then press the "1", "1",
and"~" buttons
to set to the Self Auto Convergence display.
® Select an item pressing "A" or "T" button
on the remote hand unit. Select the color
using "R/G/B" button.
@ Set the data in shown below pressing
"--4 "or"~" button.
® After finishing the set up; write the data
into memory by pressing "ENTER".
® Press the ''TEST' button on the remote
hand unit to terminate the adjustment mode.
Correction Coefficient
Color
Item Item
RED
GREEN BLUE
ALL
H HWID 0 -0 -V VKLT
H
HUN
+87 +52
-36 -v VKLB
H VKLT 0 0 0 -V VKRB
H VKLB 0 0 0 -V VKRT
H VKRB 0 0 0 -v HPCC
----------
-----
----
-;-0--
----- ----------
H VKRT 0 0 -v VPCC
H HKLT 0 0 0 -v HCNL
H HKLB 0 0 0 -v HCNR
H HKRB 0 0 0 -
.y
H11
H HKRT 0 0 0 -v
H21
---------- -----
----
----- -----
----------
H HPCC ---0 v H32
H VPCC ---
-70
v V11
H HCNL
+38 0 +49
-V V12
H HCNR
+18 0
-36 -V V23
H VCNL
-42
0
-39 -
---------- ----- ----
-----
-----
----------
H VCNR
-16
0
-54
-
H H11
-42
-27
-39
-
H H21
+25 0
-27 -
H H32 0 0 0 -
H V11
-47
-12
+11 -
----------
---- -----
----
H V12 0 0 0 -
H V23 0 0 0 -
RED
0
0
0
0
-
----
-
+44
+61
-17
0
----
0
-51
+14
0
----
-13-
Self Auto Convergence Display
Adjustment Adjustment
Function Color Frequency
L-----------t-Adjustment
Abbreviated Name
Color
GREEN BLUE ALL
0 0 -
0 0 -
0 0 -
0 0 -
--
+44
-----
-----
----
-- -14
0
-5 -
0
-37
-
-25 -17 -
0 0 -
-----
----- ----
0 0 -
0
+22
-
0
-12
-
0 0 -
-----
----- ----

Function Display
CONV RED: IC801 BLUE: IC802 GREEN: IC803
No. Abbreviated Range Data
Adjustment Name Note
R G B Name
35 95
155 H22 PCC Balance
0-254 (127) # 9 (Raster Distortion)
or
36
96 156 H23 X3 Keystone Balance
0-254
(127)
#10
37
97 157 H30 X3
0-254 (127) (Dynamic Convergence)
38
98
158 H32 Horizontal Inside PCC
0-254
(127)
39 99
159 H42 Horizontal Comer Pin Balance
0-254 (127)
40 100 160
H51 Horizontal Inside Keystone 0-254 (127)
41
101 161 V03 Y3 0-254
(127)
42 102 162
V11 Vertical Keystone 0-254
(127)
43 103 163 V12 Vertical Keystone Balance 0-254
(127)
44 104 164 V13 Vertical inside Keystone
0-254
(127)
45 105 165
V21 T/B PCC 0-254
(127)
46 106 166 V22 Vertical
PCC Balance
0-254 (127)
47 107 167 V23 Vertical Inside PCC
0-254 (127)
48 108 168
V31
Y:,3 Keystone
0-254 (127)
49 109 169
V41
Vertical Seagull
0-254 (127)
50
110 170 V42 Vertical Seagull Balance
0-254 (127)
51
1 11 171 V51 X5Y1 0-254 (127)
Note 1 : The contents of the adjustments
in [ ] indicate operation in full colors.
Note 2 : The contents of the adjustment No.
in [ ] indicate that the operation is impossible.
Function Display ATC
No. Abbreviated Adjustment Name Range Data Note
R G B Name
0 -6 HSTA Horizontal Static -50-+50 0
1 -7 VSTA Vertical Static -50-+50 0
2 4 8 TILT Tilt -50-+50 0
3 5 9 SKEW Skew -50-+50 0
Function Display
HR
!Abbreviated
Adjustment
Range Data Note
Name Name
HR
Character Position
0-30 (12) #
11 (Screen Character Position)
Function Display
DAC
No. Abbreviated Adjustment Name Range Data Note
Name
0 SUB-BRIGHT Sub-Brightness -127-+127 (0)
# 8 (White, Brightness)
1 SUB-CONT Sub-Contrast
-127-+127
(0)
2 R-GAIN Red-Gain -127-+127 (0)
3 B-GAIN Blue-Gain
-127-+127 (0)
4 H-POSI Horizontal Position
-127-+127 (0)
# 4 (Centering) and
5 H-WIDTH Horizontal Width
-127-+127
(0)
# 5 (Raster Size)
6 V-POSI Vertical Position -127-+127
(0)
7 V-WIDTH Vertical Height
-127-+127
(0)
-12-

ISETTING UP THE USER MODE I
---··
Each time the "PICTURE" button on the remote hand unit is pressed, the adjustment mode is changed (This adjustment mode
is referred as User Mode hereinafter).
Set each adjustment mode to the data shown in the chart below by pressing the"+" button or"-" button.
Note : The automatic cancellation function in the adjustment mode will function to return to the normal picture, if you do not
press any buttons for more than 6 seconds even if during the adjustment of each item.
Video Adjustment
Adjustment
Range Data
Note
Mode Abbreviation
Name
CONTRAST CONTRAST
-127-+127 0
BRIGHT BRIGHTNESS
-127-+127
0
H-POSI H-POSI
-127-+127 0
H-WIDTH H-WIDTH
-127- +127 0
V-POSI V-POSI
-127- +127
0
V-WIDTH V-WIDTH
-127- +127 0
AUTO CONV AUTO CONV --
User Mode Display
l<CONTRAST> 0 J
\\
Adjustment Name Adjustment Data
ISETTING UP THE OPTION MENU I
_... 1. Press the ''TEST'' button on the remote hand unitto change to the Option Menu.
The built-in cross-hair test pattern will appear.
2. Press the "1", "1", and "9"
on the remote hand unit in that order to display the Option Menu.
3.
The adjustment items can be selected pressing the "A" or 'T' button. The setting can be changed by pressing
"ENTER".
Function Display OPTION
Abbreviated
Adjustment Name
Range Setting
Note
Name
INITIAL ---- -- -----
E2RESET
-----
- -
-----
HOUR-RESET Reset
of an integrating timer - -
This is a measure for replacement time for CRT.
POWER ON DELAY Power On Delay
2-20sec
2sec ----
Note : Perform HOUR-RESET to reset the time to 0 after replacing the CRT.
-14-

, ..........
-·
!ELECTRICAL ADJUSTMENTS!
Perform only the adjustments required.
•Measuring Equipmentand Jigs
0 Oscilloscope (Unless otherwise specified in particular, use 10 : 1 probes.)
0 RGB Signal Generator (VG-814 made by Astrodesign)
0 Frequency Counter
0 DC Voltmeter
0 DC Ampere Meter
0 Electrical Tools
•rest Signal
Use the following timing signals :
Horizontal Vertical
Video Signal
Synchronizing Signal
Timin~
Program
Signal Pattern
Frequency
Frequency (Upper
line : Horizontal Time [J.lS] Lower line : Vertical line [H])
No.
fH fv
A+B
c E B D
· [kHz] [Hz]
[J.1S]I[H]
[J.1S] I [H]
[).lS] I [H] [).lS] I [H] [).lS] I [H]
11 Standard Signal!
OPTION2 24.39 57.52 41.00/424 3.00/4
4.38126 30.75/381 2.87113
12 Standard Signal J Crosshatch
with circle 24.39 57.52 41.00/424 3.0014 4.38126
30.751381
2.87113
13 Standard Signal K Crosshatch 24.39 57.52
41.00/424 3.00/4 4.38/26
30.75/381
2.87113
15 Standard Signal M
Full White Raster 24.39 57.52 41.00/424 3.00/4 4.38/26
30.751381
2.87/13
17
Standard Signal 0 Gray Scale 24.39 57.52
41.00/424 3.00/4 4.38/26 30.751381 2.87113
18 Standard Signal P Full Black 24.39 57.52
41.00/424 3.0014
4.38126 30.75/381 2.87113
21
Standard Signal Q OPTION2 31.67 60.32
31.58/525 3.58/2 1.71150
25.88/448 0.41125
22 Standard Signal R Crosshatch with circle 31.67 60.32
31.581525 3.5812
1.71150
25.881448 0.41125
23
Standard Signal S Crosshatch 31.67 60.32
31.58/525 3.58/2
1.71150
25.881448 0.41125
24 Standard Signal T CHARA WINDOW 31.67 60.32
31.58/525 3.58/2
1.71150
25.881448 0.41/25
25
Standard Signal U Full White Raster 31.67 60.32
31.58/525 3.58/2
1.71150
25.881448 0.41125
27
Standard Signal W Gray Scale 31.67 60.32
31.58/525 3.5812
1.71150
25.881448 0.41/25
28
Standard Signal X
Full Black 31.67 60.32 31.58/525 3.58/2 1.71150
25.881448 0.41/25
29
Standard Signal Y Centering 31.67 60.32
31.58/525 3.58/2
0.49121 26.941502 0.57/0
30 Standard Signal Z Dot 31.67 60.32
31.58/525 3.58/2
1.71150 25.881448 0.41/25
-15-

!LOCATION OF TEST POINTS AND ADJUSTMENTS!
PCB-DEFL (Component side) =
§§
VR501
PCB-AFC (Component side)
TPGND
~
TP2H
~
~
TP1H
~
§]
T502
Front View
VR5C1 CID
-16-
4
201 OoR
DS
1
Front View

PCB-CRT (G) (Component side)
@
TP-GNO
ffiJ
VR6GO
@
TP-G
PCB-CRT (R) (Component side)
ffiJ
VR6RO
PCB-CRT (B) (Component side)
ffiJ
VR6BO
PCB-DEFL V (Component side)
ffi) VR452
ffi) VR451
lr----:-1=c4=s--:-1 ---,
-17-

ADJUSTMENT PROCEDURES
[Deflection Circuit]
Adjustment Setthe oscillating frequency in a horizontal synchronizing circuit.
purpose
1. Horizontal Free Run
Frequency Symptom when
incorrectlyadjusted Horizontally shifted picture.
Measuring
Instrument
Test Point
External Trigger
Measurement
Range
Input Signal
Frequency Counter
+Side: TP1 H, TP2H
-Side: TPGND
VG814 (No.11)
OPTION2
Input Terminal
Mini D-SUB 15 Pin Input Terminal
PCB-AFC (Component side)
TPGND
Cl)TP2H
) IC5C1 I
TP1H
G
§]
VRSC1 Clll
1. Set VR5C1 to the center position.
2. Supply an OPTION2 signal (No. 11).
3. Connect"+" side on the frequency counter to TP2H. And connect"-" side to
TPGND.respectively to turn
on the power.
4. Respectively to turn the power on.
5. Adjust VR5C1 with no signal supplied· so that the frequency counter is 24.39±
0.01kHz.
[High-voltage Circuit]
2. High Voltage Control
Adjustment Set high-voltage to be applied to the CRT.
Measuring
Instrument
Test Point
"--. External Trigger
. ...;'Measurement
Range
Input Signal
purpose
Symptom when
incorrectly adjusted
Too widened or narrowed picture or too bright or dark picture.
DC Voltmeter 1. Supply a Full Black signal (No.18).
2. Connect"+" side on the DC voltmeter to CD pin of Connector OS. And connect
+Side:(j) pin of Connector DS "-"side to® pin of Connector OS and measure the voltage.
-Side:® pin of Connector DS 3. Adjust VR501 so that the voltage is 19.85± 0.02V.
VG814 (No.18)
Full Black
Note ; After adjustment, fix VR501 with hot melt adhesive
so as not to be
readjusted and fluctuated.
InputTerminal Mini D-SUB 15 Pin Input Terminal
PCB-DEFL (Component side)
B
T502
ffi
VR501
-18-