13/19" Main Microprocessor Circuit - Zenith TVBR1342Z Service Manual

1 2
G
F
5 REC/PB
10 REC/PB
2V 20µs/div
1V 0.5ms/div
E
11 REC/PB
6 REC/PB
1V 10ms/div
1V 5ms/div
D
TO SHEET 16
7 REC/PB
C
1V 50ns/div
B
8 REC/PB
1V 10ms/div
A
9 PB
1V 2ms/div
CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE SYMBOL
REPLACE ONLY WITH PART NUMBERS SPECIFIED.

13/19" Main Microprocessor Circuit

3 4
FROM/TO TV POWER
DEGAUSS_H
GND
POWER_FAIL
P.CON+5V
TO SHEET 9
AT+12V
MOTOR_GND
TV_POWER_H
LOADING MOTOR DRIVER IC
IC1003 BA6955AN
CONTROL LOGIC
STD
X_RAY
POWER
SAVE
1 2 3 4 5 6 7 8
12.1 0 0 0 10.8 0 10.9 12.1
VCR_A_MUTE
TV_A_MUTE
SP/LP/EP-H
D1004
RD12FB
D1005
11E1-EIC
CAP_FG
CYL_FG
R1005
D1001
CYL_PG
2.7 1W 11E1-EIC
FROM/TO DECK
CP1006
CENTLED
52045-0445
CTL-
1 VCC
CTL+
2 BOT
LM-
3 LDM-
FF/REW_SW
LM+
4 LDM+
Q1004
EOT SENSOR C1002
DTC124EuF
Q1013
C1005
PNA2604M010R 0.001 uF
0.001 uF
0.1
5.0
TAB_SW
0
5.1
C_ROTARY
FROM/TO MICRO MOTOR
0
LED DRIVER
CP1005_1 Q1024 H.SW
D1013
DTC143EuF
52045-0545
11EQS04N
5 CYL DRIVE
4 CYL GND PROVISIONAL CAP_F/R
3 CYL FG C1064
2 CYL +B
16V 470 uF
1 CYL PG
CYL_DRIVE
CYL_FG
CYL_PG
C1066
FROM/TO CAPSTAN DD UNIT
0.1 uF
CP1004 TMC-J08P-B1
1 GND
2 MOTOR_GND
3 I LIMIT
CAP_CTL
4 CTL
5 VCO
CAP_FG
6 FG
R1010
CAP_F/R
7 CAP/M/F/R
3.3K
8 VCC(5V)
.
5 6
C1044
220P pF
C1045
R1029
220P pF
4.7K
R1044
R1064
3.3K
1K 5.9
0.2
W810
X_RAY_SW
0
Q1023 NC
NC NC
0.9 0.9 0 1.8 2.5 0 4.9 2.5 2.6 0 4.8 4.8 4.9
2SC2412K
80 79 78 77 76 75 74 73 72 71 70 69 68
0
R1077
5.1
1K
5.1
NC
5.1
POWER_FAIL_L
5.9
81 VCR_A_MUTE
CFG AMP-OUT
11
2.6
R1008
W859
82 TV_A_MUTE
CAP-FG
2.5
1K C1013 0.0039 uF
83 SP/LP/EP-H
AMP-VSS
0
84 CA/MA_SEL
DRUM-FG
2.0
10
DRUM-PG
0.6
C1015 10V 47 uF
AMP-VREFOUT
2.5
C1016 16V 22 uF
AMP-VREFIN
2.5
C1018 50V 4.7 uF
98 AMP-VCC
C
0.2
R1009 560
99 ANALOG VCC
CTL-
R1012 C1019
0
R1013 560
10K 0.001 pF 100 DEW
CTL+
2.5
C1020
AMP C
C1027
2.6
C1022 16V 10 uF
0 0.0039 uF
CTL AMP-OUT
2.5
0.1 uF
9
5.1
5.1
0
5.2
W895 0
TIMER SYSCON MICON IC 11 2 3 4 5 6 7 8 9 0 11 12 13
IC1001
1.4 1.4 0 0 0 2.4 2.2 5.2 5.2 0 2.2 0
OEC7043A
R1024
1K
MS_SEN A
5.1
Q1009
1.3
GP1S94L
SENSOR SW
Q1002 1.2 5.2 2.4 1.2 1.2 0
0.8 5.2
2SC2412K 1 2 1 2
2 3 2 3
5.1
1 4 1 4
0.8 1.4 0.5 1.4
4 3 4 3
MS_SEN B
0 0.9 0 0.9
Q1003 REEL SENS REEL SENS
Q1001 Q1005
GP1S94L
SG-260 SG-260
5-11 P/L = See parts list for part description
7 8
SERVICE R1032
TP1001 10K
NC
C1041
0.1 uF
C1034
5
0.1 uF
C1035
6
200P pF
C1031
0.001 uF
R1033
1K
0 2.5 0 0 0 5.1 0 4.9 4.2 0 2.3 1.6 2.1 5.2 0 5.2
67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
TAB_SW
5.2
0
NC
0
NC
CM_ADV_VIDEO/AV1
0
NUB
0
C1046 20P pF
50 TAB SW
OSC-OUT2
L1001
2.6
2.2uH
49 OSD-VSS
OSC-IN2
2.5
R1040 C1047 18P pF
48 CM_ADV_AUDIO/AV2
CLKSEL
5.2
33K
TUNER_CONTROL NC
0
X-RAY_TEST
X-RAY_TEST
0
VSS
0
7 C1040 18P pF
X-OUT(12MHz)
X1001
2.6
12MHz
X-IN(12MHz)
2.1
C1048 18P pF
33 INPUT_SELC
VCC
32 RENT_H 5.2
C1049 22P pF
XC_OUT(32KHz)
31 ON-TIMER LED
X1002
1.3
32.768KHz
XC_IN(32KHz)
1.5
C1050 20P pF
RESET
RESET-L
5.2
INPUT_SEL
0
NC
0
NC
0
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
0 0 5.2 2.3 2.6 2.6 0 0 0 5.2 0.1 5.2 5.2 0 0
0
NC NC NC NC
8 C1030
0.1 uF
H.SW
2.5 2.6 0 5.2
TP1002
5 6 7 8
4 3 2 1
00 0 0
SYSTEM RESET IC
IC1002 PST600H
R1049 This schematic
applies to the
4.7K
following models
only:
IN GND OUT
TVBR1342
1 2 3
TVBR1942
0 5.2
D1002
1SS133
PROV = Provisional
9 10
FROM/TO HEAD AMP
H.SW
DOC_XO_CTL
REC/EE/PB
SP/LP/EP-H
TRICK_PB-H/EE-H
C1062
SD_VIDEO
0.1 uF
ENV_DET
R1078
TO SHEET 13
VCR_A_MUTE
470K
CTL+
CTL-
C_ROTARY
DUMMY_V.SYNC
V.REC_ST_H
COMP
INPUT_SEL
FROM/TO CHROMA
HD
VD
AFT_M
SCL
SDA
OSD_R
C1026
0.1 uF
OSD_G
TO SHEET 12
OSD_B
OSD_BLK
AT+5V_BACKUP
AT+5V
VCR_POWER_H
TV_POWER_H
TV_POWER_H
VCR_POWER_H
FROM/TO IN/OUT
IIC_OFF
R1004
TV_POWER_H
1K
REC_LED
T-REC_LED
TO SHEET 17
KEY_A
KEY_B
REMOCON_IN
SCL
SDA
TO AUDIO AMP
TV_POWER_H
TO SHEET 14
TV_A_MUTE
FROM/TO DEFLECTION
X_RAY
TO SHEET 10
X-RAY_TEST
TV_POWER_H
R.SIGNAL
G.SIGNAL
B.SIGNAL
TUNER VIDEO SIGNAL
CAPSTAN AFC SIGNAL
CYLINDER AFC SIGNAL
CYLINDER APC SIGNAL
HORIZONTAL SIGNAL
VERTICAL SIGNAL
TVBR2000 SHEET 11