Text preview for : CHASSIS CTE-AA SERVICE MANUAL.pdf part of SERVICE MANUAL
chasis CTE-AA PHILIPS,TECNIMAGEN,Bluesky,siera,
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CONTENTS Page
1.- Technical specifications 3
2.- Connection Facilities 3
3.- Mechanical instructions 4
4.- Oscillograms 5
5.- Print board layout 6
6.- Electric Scheme 7 - 11
7.- Circuit description 12
7.1 Small signal processing 12
7.2 RGB ampliers 14
7.3 Deflection 14
7.4 Sound amplifier 15
7.5 Power supply 15
7.6 Microcontroller/Text 17
8.- Electrical adjustments 18
9.- Safety instructions 21
10.- List of abbreviations 22
11.- Service components 23
2
1. Technical specifications
CHASIS CTE - AA
Mains voltage : 220 - 240 V ± 10% AC; 50 Hz (±15%)
Power cons. at 220V~ : 35W (14" ), 50W (20"/21"), <3W (Stand-By)
Aerial input impedance : 75 W - coax
Min. Aerial input VHF : 30 µV
Min. Aerial input UHF : 40 µV
Max. Aerial input VHF/UHF : 180 mV
Pull-in range colour sync. : ± 300 Hz
Pull-in range horizontal sync. : - 600 Hz/ +480 Hz
Pull-in range vertical sync. : ± 5 Hz
Picture tube range : 14'' / 20`' / 21"
: Mono 25W 1W (14") 16W 2W (20"/21")
TV Systems : PAL BG
PAL I
PAL BG / SECAM BG DK
PAL BG / SECAM BG L L'
Indications : On screen display (OSD / menú)
1 LED RED. Dark in ON, bright in stand by,
Blinking with RC or ON Timer
VCR Program : 0 to 99
Tuning and operating system : VST/PLL
UV1315A/IEC (VST) - UV1316/A (PLL) : VHFa: 48 - 168 MHz
VHFb: 175 - 447 MHz
UHF: 455 - 855 MHz
Local operating functions : Vol/Prog, +, -, contrast, colour, brightness and sharpness
(hue with NTSC signal through scart)
2. Connection facilities
Euroconector:
1 - Audio R ( 0V5 RMS @ 1K ) 17 - CVBS
2 - Audio R ( 0V2 - 2V RMS @ 10K ) 18 - CVBS
3 - Audio L ( 0V5 RMS @ 1K ) 19 - CVBS ( 1Vpp @ 75W )
4 - Audio 20 - CVBS ( 1Vpp @ 75W )
5 - Blue 21 - Earthscreen
6 - Audio L ( 0V2 - 2V RMS @ 10K )
7 - Blue ( 0V7pp @ 75W )
8 - CVBS status1 ( 0-2V int., 10-12V ext.)
9 - Green
10 - -
11 - Green ( 0V7pp @ 75W )
12 - -
13 - Red Headphone:
14 - -
15 - Red ( 0V7pp @75W )
8W to 600W (32W - 25mW)
16 - RGB Status ( 0-V4 int.) ( 1-3V ext.@ 75W )
3. Mechanical instructions
For the main carrier two service positions are possible (3.1).
A: For faultfinding on the component side of the main carrier.
B: For (de) soldering activities on the copper side of the main carrier.
Position A can be reached by first removing the mains cord from it's fixation, then loosen the carrier lips (1) and then pulling the
carrier panel (2) for approximately 10cm.
Position B can be reached from position A after disconnecting the degaussing cable. Put the carrier on the line transformer side.
Fig. 3.1
4
4.- Oscillograms
5
6
5.- Print Board Layout
7
6.- Electric Diagram
- TV PROCESSOR - +5 +5 +8 +8
+8 +8 +8 +8
B-C-E-F
+8 +8
A1 A2
PT161 PT173
1 56 +8 +8
1 5
IF SIF_IN1 FM_CAP
C1
A1 PT159 PT213
PT175
2 55
2 4
SIF_IN2 AUDIO_OUT AUDIO_OUT
PT178 C13
3 F13
PT152
L/L' 3 54
E2
AGC_SIF_CAP GND_D
PT165 PT148
4 53
IFVref VCCD
PT156
PT143 5 52
AGC_PIF_CAP SDA SDA_2
E14
PT141 PT147
6 51
1 4
IF PIF_IN1 SCL SCL_2
C1 E15
A1 PT144 PT121 PT151
A3 2 5
7
PIF_IN2 SLPF
50
H_FLYBACK
C16
B16
3
PT126 PT146
8 49
AGC TUNER_AGC_OUT LBF/SSC H_FLBUP
C4 E17
PT163
PT136 PT129 PT138
9 48 B18
IF_PLL HOUT PT142
LINE_DRV
B19
SW_AGC PT168 VERT_DRV
PT206 C19
E60 10 47
PT43 GND_IF VERT VSYNC
E20
SC_AUDIO_OUT PT113 PT127 PT94
C5 11 46
F5 C21
AM/FM_OUT BCL/SAF BCI/SAF
B21
PT52
12 45
VCC_IFF VCC1
PT114
PT44 PT169
PT115
13 44
INT_CVBS INT_CVBS_OUT CVBS_OUT1 CVBS_TXT
C6 E22
PT51
14 43
AUDIO_EXT EXT_AUDIO_IN GND1
C7
PT109
PT106 PT108 PT105
15 42
PIF_LC1 X1/VAMP/CHR_OUT VAMP
B23
PT102 PT104 PT107
16 41
PIF_LC2 CLPF
PT120
17 40
VCC2 XTAL1
PT99 PT93 PT92
18 39
CVBS_IN1 XTAL2
19 38
GND2 XTAL3 RES
PT50 PT54
20 37
CVBS_EXT CVBS_IN2 FB_OSD FB_OSD
C8 E24
PT87 PT88
21 36
PT62
BS R_OSD R_OSD
E25
PT83 PT84
22 35
Y/CVBS_IN3 G_OSD G_OSD
E26
PT78 PT80
23 34
CHR B_OSD B_OSD
E27
PT66 PT75
24 33
APR I_CATH
PT24 PT59 PT76 PT69
25 32
B_EXT B_EXT R_OUT
C9 B29
M7:3
PT28 PT48 PT71 PT68
26 31
G_EXT G_EXT G_OUT
C10 M7:2 B30
PT34 PT64 PT70 PT67
27 30
R_EXT R_EXT B_OUT
C11 M7:1 B32
PT46
28 29
FB_EXT FB_EXT NC. M7:4 B31
C12 PT85
GND GND GND GND GND GND GND GND
GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND
8
A - RGB & DISPLAY COMPONENTS -
- DISPLAY -
+200
6201 33
3202 PT356 PT327
BAV21
1K5 1M1
PT365 3203
7205
A32 BF422
L2:1 B
PT349
3K9 3204
3210 PT317 RG
22R
PT345
23
3208 2204 GR
VG1
FF*
VG2
+200
FF
FOCUS
FOCUS
PT320
3215 6218
PT358
BAV21
3216
9226
PT347 PT362 1K5
3214 * 7210
BF422 AQUA +200
A30
PT311
PT322
L2:2
PT350
3K9 3218
AQUA
3211 3228 2209
PT293
22R
PT346
3220 * 1K5
PT305
3222 PT331
2218
3221 *
+200
PT315
3234 6227
5235
BAV21 PT359 PT325
3229
PT355 PT363 1K5
3226
1K5
3217 * 7213
A29 BF422
L2:3 PT335
PT319
PT348 +200
3K9 3230
3212 3244
L3 1M1
22R
PT344
2208
10U
2230
L1:3
L1:1
L1:4
PT339
PT329
FOCUS
25KV
VG2
A31
FF
FF
L2:4
B37
B38
B39
B33
B35
B36
7401 +8
+25 TDA8174AW
- FRAME -
VOLT.REF
FEED_B
3432
V_SINC
V_SIZE
390K
BUFF
FLYB
C21
SAW
GND
OUT
VCC
3400 PT42 PT38
BCI/SAF
+V
1K2 3433
PT63
A21
3402 1 2 3 4 5 6 7 8 9 10 11 PT81
PT128 PT112 PT122 47K 100K
390R
PT117
+25
PT119
3430
PT125
100K
3434
3463
PT97
PT139
2410
3406 * 100U 24K
3418
10K
M5:2 M5:1 2R 2452 6401 3431
PT41
PT103
10U 10K
PT124
2403 RGP10M
220N
3410 PT91 3407
*
2407
*
PT153 4K7 1K2
3403 100N BCI
PT65 B40
3K9 3405 3417
PT133
PT74 BCI'
2406 10M B61
2404
3404 PT157 47N
1500U 1K5 PT134
2405 3413
*
3416
3401 22U VAMP
VERT_DRV
A23
PT150
120K 100K
PT118
3409
*