Daewoo DV-K211, DV-K821, DV-K421, DV-K221, DV-K441 Service Manual

Service Manual

S/M No. : VK811PSEF0

Jan. 2000

DAEWOO ELECTRONICS CO., LTD.

http : //svc.dwe.co.kr

Video Cassette Recorder

Model: DV-K841DY (VQ837)

F2GHA0

A

2

ELECTRICAL ADJUSTMENT

1. PLAYBACK PHASE

ADJUSTMENT PROCEDURE

1. Play back the test tape. (DP-2)

2. Set the oscilloscope to the CHOP mode. Connect CH1 to the SW PULSE (PIN 4 of P504)

3. Connect CH2 to the ENVE signal (PIN5 of P504)

4. Insert PATH JIG and press "REC" button on the remote control.

5. Check the position of the V-sync from the rising edge of the SW pulse.
(Standard : 6.5H ± 0.5H)

ITEM MODE

ADJUSTMENT

POINT

CHECK POINT

TEST

EQUIPMENT

TEST
TAPE

INPUT

SIGNAL

6.5H

ADJUSTMENT

PLAY [REC] BUTTON

PIN 4 & PIN 5

OF P504

OSCILLOSCOPE DP-2 NO SIGNAL

ADJUSTMENT PARTS MEASURING POINT

PCB : MAIN - TOP VIEW

TMI
BLOC

PRE­AMP

P50

TO PATH JIG

OSCILLOSCOPE

CH1 CH2

PATH JIG

3

SPECIFICATIONS

CHANNEL COVERAGE

INPUT/OUTPUT JACK TYPE

GENERAL

Power Requirement
Power Consumption
Temperature

Operating position
Dimensions (W x H x D)
Weight
Format
Tape Width
Tape Speed

Maximum Recording Time with full-size cas­sette

AC 230V, 50Hz
Max. 19W (in REC mode)
5×C ~ 35×C (Operating)

-20×C ~ 60×C
Horizontal only
360 x 90 x 288 (mm)
Approx. 3.85 Kg
VHS standard

12.65mm
(SP) : 23.39mm/sec
(LP) : 11.70mm/sec
(SP) :240min, with E-240 video cassette
(LP) :480min, with E-240 video cassette

VIDEO

Signal system
Recording system

Input
Output
Signal-to-Noise ratio

Horizontal resolution

PAL/SECAM colour and CCIR monochrome signals, 625 lines/50 fields
Rotary two-head helical scan with a slant double-azimuth combination video
head

1.0Vp-p, 75ohms, unbalanced

1.0Vp-p, 75ohms, unbalanced
45dB (Rhode & Schwarz noise meter) with NETTETE IMAGE control at cen­ter position
240 lines with NETTETE IMAGE control at center position

AUDIO

Recording system
Input
Output

Frequency Range
Signal to Noise Ratio
Audio Distortion

Longitudinal track

-8dBm, (CENELEC standard),more than 47 k-ohms, unbalanced

-6dBm, (CENELEC standard), less than 1k-ohms, unbalanced(100k-ohms,
load)
100Hz to 8,000Hz
More than 38dB
Less than 3% (SP)

TUNER

Tuning system
RF Output

Voltage synthesized tuner Programmable V/S 99CH (Hyper band)
UHF channel 21~69 (52)

TIMER

Memory programmable
Back up time
Clock exactness

99 CH
Less than 1 Hour
In accordance with the exactness of power supply frequency (50Hz)

ACCESSORIES

Provided Accessories Remote control unit, RF Cable, Battery

SYSTEM

SECAM-L

PAL, SECAM-B/G, PAL-I/I

PAL, SECAM-B/G, D/K, HYPER BAND

PAL-I

CHANNEL

VHF Ch 2~12

UHF Ch 21~69

CATV Ch X,Y,Z S1~S41

UHF Ch 21~69

Model

EUROPE Asia, South Africa, Australia

Jack Type

SCART Type RCA Jack (Phone Jack)

*

Design and specification can be subjected to change without notice.

4

VOLTAGE CHART

PDC/VPS IC
(IC151, LC74793)

PIN NO. REC PB

1 0 0
2 2.64 2.68
3 2.68 2.72
4 0 0
5 0 0
6 3.7 3.7
7 3.9 3.9
8 4.98 5.12

9 0 4.74
10 0 0
11 1.63 3.18
12 1.63 3.18
13 0.82 1.35
14 0.01 0.01
15 5.09 5.12
16 2.75 3.02
17 2.55 2.57
18 4.67 4.72
19 5.01 5.02
20 4.99 5.06
21 0 0
22 3.74 3.79
23 5.05 5.11
24 5.08 5.13

EEPROM
(IC503, ATM24C16)

PIN NO. REC PB

1 0 0
2 0 0
3 0 0
4 0 0
5 3.9 3.9
6 3.9 4
7 0 0
8 5.24 5.29

MOTOR DRIVE IC
(IC502, KA3082)

PIN NO. REC PB

1 0 0
2 0.55 0.55
3 8.78 0.88
4 6.24 6.24
5 0.01 0.01
6 0.01 0.01
7 12.12 11.74
8 12.12 11.74
9 0.91 0.91

10 0.55 0.55

SECAM.L IC
(IC361, TA1238N)

PIN NO. REC PB

1 2.48 2.49
2 2.72 2.4
3 2.97 2.96
4 4.1 4.12
5 5.05 5.06
6 4.68 4.69
7 4.75 4.74
8 0 0

9 0.56 0.56
10 0 0
11 3.27 3.27
12 1.84 1.89
13 3.44 3.45
14 0 0
15 1.9 1.9
16 3.24 3.24
17 5.03 5.04
18 2.55 2.65
19 1.74 1.73
20 0 0
21 2.63 2.63
22 2.61 2.63
23 3.45 1.86
24 2.57 2.57

5

VOLTAGE CHART

A/V ICHIP IC (IC301, LA71594M)

A/V SW IC (IC601, LA7148M)

PIN NO.

REC PB

PIN NO.

REC PB

PIN NO.

REC PB

PIN NO.

REC PB

1 2.5 2.5 26 0 - 51 1.9 1.9 76 2.5 2.5
2 2.5 2.5 27 - - 52 2.4 2.4 77 - 0
3 2.5 2.5 28 - - 53 0 0 78 2.5 2.5
4 2.5 2.5 29 0.8 0.8 54 2.4 2.4 79 2.5 2.5
5 2.5 2.5 30 0 1.0 55 5.0 5.0 80 2.5 2.5
6 2.5 2.5 31 2.1 2.1 56 0.5 0.5 81 0 0
7 2.5 2.5 32 1.8 1.8 57 3.4 3.4 82 4.1 1.8
8 0 0 33 2.0 2.0 58 5.0 5.0 83 0 0

9 0 0 34 1.8 1.8 59 3.4 3.4 84 4.1 1.8
10 - - 35 3.5 3.5 60 3.5 3.5 85 4.1 1.8
11 - - 36 1.8 1.8 61 3.3 3.3 86 0 0
12 - - 37 4.9 4.9 62 3.5 3.5 87 5.0 5.0
13 1.5 1.5 38 1.8 1.8 63 4.0 4.0 88 4.1 1.8
14 1.7 1.5 39 4 4 64 2.2 2.2 89 0 0
15 2.2 2.2 40 5 5 65 2.4 2.4 90 4.1 1.8
16 5 5 41 2.7 2.7 66 2.8 2.8 91 4.1 1.8
17 0.05 3 42 3.0 - 67 4.0 4.0 92 1.6 ­18 2.1 1.8 43 1.9 1.9 68 0 0 93 - ­19 2.1 2.1 44 - - 69 2.0 2.0 94 0.7 0.5
20 2.8 2.8 45 1.8 1.8 70 2.0 2.0 95 0 0
21 2.1 2.1 46 1.9 1.9 71 2.5 2.5 96 2.5 2.5
22 0 0 47 2.0 2.0 72 2.5 0.3 97 0 0
23 - - 48 2.3 2.3 73 2.5 2.5 98 2.5 2.5
24 - - 49 1.2 1.2 74 - 2.0 99 4.3 5.0
25 1.8 1.8 50 0 0 75 5 5 100 2.5 2.5

PIN NO.

REC PB

PIN NO.

REC PB

PIN NO.

REC PB

PIN NO.

REC PB

1 5.89 5.89 10 5.47 5.47 19 2.14 2.06 28 0.09 0.09

2 0.37 0.37 11 0 0 20 2.02 1.87 29 5.25 5.25

3 0 0 12 0 0 21 1.49 1.07 30 0.09 0.09

4 0.08 0.08 13 0 0 22 1.49 1.07 31 5.26 5.26

5 5.89 5.89 14 2.14 2.14 23 2.04 1.15 32 0.09 0.09

6 0 0 15 5.05 5.06 24 0 0 33 0.09 0.09

7 0 0 16 1.73 1.73 25 3.75 3.75 34 6.11 6.11

8 9.36 9.36 17 5.05 5.05 26 4 4 35 5.25 5.25

9 5.89 5.89 18 1.73 1.73 27 0.09 0.09 36 5.89 5.89

6

VOLTAGE CHART

HI-FI IC (IC251, TDA9605H)

PIN NO.

REC PB

PIN NO.

REC PB

PIN NO.

REC PB

PIN NO.

REC PB

1 0 0 12 0 0.03 23 3.85 3.81 34 9.42 9.36

2 3.81 3.81 13 3.83 3.83 24 3.86 3.77 35 4.21 0.53

3 3.81 3.81 14 0 0 25 3.86 3.85 36 4.2 0.53

4 0 0 15 3.33 3.31 26 0.74 0.7 37 4.18 0.53

5 0 0 16 4.56 4.56 27 0 0 38 4.2 0.17

6 3.81 3.81 17 4.55 4.56 28 3.82 3.82 39 0 0

7 3.81 3.81 18 3.31 3.29 29 3.85 3.82 40 5.05 5.09

8 3.81 3.81 19 4.56 4.56 30 0.72 0.7 41 0.93 0.94

9 3.81 3.81 20 4.56 4.56 31 3.86 3.81 42 3.75 3.7
10 3.81 3.81 21 4.56 4.56 32 3.86 3.79 43 3.95 4
11 3.81 3.81 22 3.81 3.81 33 3.86 3.77 44 1.74 2.1

NICAM IC (IC051, MSP3417DQ)

PIN NO.

EE

PIN NO.

EE

1 0.03 27 0
2 2.29 28 0
3 0.01 29 0
4 0.01 30 3.69
5 0 31 3.7
6 4.95 32 0
7 3.95 33 8.25
8 3.7 34 6.57

9 0 35 0
10 0 36 3.66
11 0 37 0
12 0 38 0
13 0 39 3.68
14 0 40 3.68
15 0 41 3.68
16 4.95 42 3.68
17 0 43 2.54
18 0.01 44 3.69
19 0 45 0
20 5.1 46 4.92
21 0 47 1.5
22 0 48 1.5
23 0 49 0

A2 IC (MSP3407DQ)

PIN NO.

EE

PIN NO.

EE

1 0.01 27 0
2 0 28 0
3 0.01 29 0
4 0.01 30 3.72
5 0 31 3.73
6 5.02 32 0
7 3.6 33 8.15
8 3.3 34 6.47

9 2.47 35 0
10 2.46 36 3.68
11 2.43 37 0
12 0.02 38 0
13 0.03 39 3.71
14 0.02 40 3.71
15 0.02 41 3.71
16 5.02 42 3.71
17 0 43 2.57
18 0.02 44 3.72
19 0.01 45 0
20 5.12 46 4.98
21 0 47 1.51
22 0 48 1.51
23 0 49 0

7

VOLTAGE CHART

TMI (RF101, LGTMI-SLQ1-S)

PIN NO.

REC PB

PIN NO.

REC PB

PIN NO.

REC PB

PIN NO.

REC PB

1 4.83 4.9 7 31.9 31.9 13 4.9 0 19 1.08 0
2 0 0 8 1.91 0 14 4.9 0 20 0.23 0.03
3 3.7 3.7 9 0 0 15 0 0 21 2.43 0
4 4.85 4.9 10 0 0 16 31.9 31.9 22 2.01 0.01
5 4 3.9 11 3.9 4 17 0 0 23 2.69 0
6 0 0 12 3.7 3.7 18 0 0 24 2.74 0

24 1.66 50 0
25 1.69 51 2.32
26 0 52 2.26

PIN NO.

EE

PIN NO.

EE

24 1.69 50 0
25 1.7 51 2.35
26 0 52 2.27

PIN NO.

EE

PIN NO.

EE

REGULATOR IC
(IC802, KA431AZ)

PIN NO.

REC PB

1 2.49 2.49
2 0 0
3 4.82 4.82

8

CIRCUIT DIAGRAM

1. POWER CIRCUIT DIAGRAM (230V ONLY)

9

2. SYSCON CIRCUIT DIAGRAM

10

3. A/V CIRCUIT DIAGRAM (PAL)

11

CIRCUIT DIAGRAM

5. PIF CIRCUIT DIAGRAM

12

CIRCUIT DIAGRAM

6. HIFI & SW CIRCUIT DIAGRAM

13

CIRCUIT DIAGRAM

7. SW CIRCUIT DIAGRAM