AMSTRAD GT65 - CTM644 Electrical Parts List

CTM644 ELECTRICAL PARTS LIST
Value
Circuit Reference
Part
No.
Carbon Film Resistors (all1f4W unless otherwise shown)
1000hm
R810, 901-903
10032
2200hm R407,416
10040
2700hm R807,811,814
10042
3300hm R401, 404, 422
10044
3900hm R414
10046
4700hm R505,510
10048
1kohm
R411,423,432,519,815,
10061
816
1k50hm
R420, 421, 441
10065
1k80hm R402,403,442
10067
2k2ohm
R410
10069
2k7ohm R904-906
10068
4k7ohm R426,518 10077
6k8ohm R415 10081
8k2ohm
R406,
41 8, 41 9
10083
10kohm
R424,428,429
10085
12kohm
R409
10087
15kohm R431,450 10089
27kohm R425 10095
47kohm
R412,440 10101
56kohm R417
10103
82kohm
R430,439 10107
180kohm R408
10115
220kohm
R413
10117
270kohm
R504
10119
680kohm R451
10129
1ohm2/1f2W
R443
170401
470ohm/1f2W R445
1422125
680ohm/1f2W R447
809223
1 kohm/
1
hW
R514-517 1400165
1k50hm/1f2W
R448
1422126
2k2ohm/
1
hW
R446 170402
2k7ohm/
1
hW
R802-804 1400166
180kohm/1f2W
R506,507 170403
1Mohm R801
1400171
Fuse Type Resistors
1ohm/%W R521
809252
8.2ohm/%W
R444 170404
10ohm/%W R511 809256
0.82ohm/1W R438 437,
1422141
2.2ohm/1W
R435,
1400184
Cement Resistors
5.6ohm/5W
IR501
I
1422138
150hm/7W
R436
170417
Value
Circuit
Reference
r
Part No.1
Metal Oxide Resistors
120ohm/1 W
R449
170405
1kohm/1 W
R503
170406
3k90hm/1W
R505
170407
15kohm/1 W
R805,812
170408
0.22ohm/2W
R513
170409
150hm/2W
R512
170410
330hm/2W
R509
170411
82ohm/2W R520
170412
100ohm/2W
R433
170413
3k30hm/2W R427
170414
6k8ohm/2W
R405
170415
1ohm/3W
R502
170416
-
Electrolytic Capacitors
1uF/50V C414 20062
1uF/160V C419
1422151
1uF/250V
C506
1422152
4.7uF/50V
C407,420 1400240
10uF/16V
C520
20024
22uF/10V C437 170418
22uF/250V C430 170419
47uF/10V
C436
170420
47uF/16V
C405,418 1400244
47uF/50V
C512 170421
47uF/160V C401
170422
100uF/16V
C412,443,523
20028
100uF/35V
C425
1422157
100uF/160V
C515 1400246
100uF/400V
C505 170423
220uF/35V
C507
20055
220uF/160V
C515
170851
470uF/10V
C518 170424
470uF/25V C435,519 20044
470uF/35V
C402,522 1422262
2200uF/25V
C424 170425
Ceramic Capacitors
22pF/500V
C416
1400217
100pF/500V
C423,441
1400218
130pF C806
170426
180pF/500V C403 170427
240pF C804 170428
270pF/2kV C432 170429
330pF
C803,807
1422255
560pF/500V C417
1400220
680pF
C802
1400213
2200pF/4kV C513 170430
0.001 uF/500V C516,521 170431
0.001 uF/2kV
C511,801 1422147
0.0015uF/2kV C510,514
170432
0.0022uF/2kV
C502-504
1400223
0.0047uF
C508,509
170433
CTM644 ALIGNMENT INSTRUCTIONS
STEP FUNCTION SIGNAL IN SIGNAL OUT
METHOD
REMARKS
1. Black and White Monitor Screen.
1. Turn R & B Drive Controls VRS04 &VRS05 fully
Monitor connected to CPC664.
Tracking. counterclockwise.
2. Turn R, G & B Bias Controls VRS01, S02, S03 fully
counterclockwise.
3. Set Ser. Nor. Switch to Ser. position.
2.
Black & White
Monitor Screen.
1. Adjust 120V at the collector of OS02 with
Monitor connected to CPC664.
Tracking.
Monitor Oscilloscope.
Brightness Control on the Oscilloscope.
2 Rotate the screen control to fully counterclockwise
& bring it back to obtain a dim line of one
prominent colour.
3. Rotate the other two colours till a dim white line
is obtained.
If required,
adjust the colcur
4. Bring Ser. Nor. Switch to Nor. position. control.
3. If no satisfactory results repeat step 2.
4. Vertical Size. Program the paper
Monitor Screen.
Adjust VR406 to obtain paper edge to be 145mm. Use non magnetic ruler.
edge.
5.
Focus Adjustment.
Program the paper Monitor Screen.
Adjust Focus Control on the Flyback Tx. for maximum
Brightness & Contrast controls
edge.
definition & details.
set to normal viewing.
6.
5V Adjustment
Switch on the Monitor. AVO Meter.
Connect AVO. across C51S & adjust VR501 to
obtain 5V exactly.
This
adjustment (6) should not be disturbed under normal conditions.
7. Sub Brightness
Switch on the Monitor.
AVO. Meter.
Connect AVO. to collector of OS02. Adjust VR402 Keep Brightness Control to
Control.
to read 120V.
maximum position.
S. Sub H. Hold &
Switch on the Monitor. Frequency Counter.
Rotate H. Hold fully counterclockwise. Read the Meter across CRT
H. Hold Adjustment. 1. Adjust VR404 to read 14500Hz. Heater & Earth.
2. Adjust VR403 to read 15625Hz
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