Daewoo DF-4200, DF-8150, DF-4100, DF-8200, DF-8100 User Manual

Service Manual

DVD Recorder

MODEL : DF-8100/8150/8200 DF-4100/4150/4200

Caution :

In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information,please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr).

Sep, 2004

CONTENTS

SPECIFICATIONS...............................................................................................................	2
TROUBLE SHOOTING....................................................................................................................	3
WAVEFORMS................................................................................................................................	25
CIRCUIT DIAGRAM.......................................................................................................................	28
PCB CIRCUIT BOARD..................................................................................................................	43
INSTRUMENT DISASSEMBLY .....................................................................................................	46
ELECTRICAL PARTSLIST............................................................................................................	48

1

SPECIFICATIONS

General

Power requirements	200–240V~, 50/60 Hz
Power consumption	32W
Dimensions (approx.)	16.9 x 3.54 x 14.0 inches (430 x 91 x 354 mm) (w x h x d)
Mass (approx.)	13.5 lbs (6.18 kg)
Operating temperature	41°F to 95°F (5°C to 35°C)
Operating humidity	5% to 90%
Signal system	PAL Colour

Recording

Recording formats	DVD Video Recording, DVD-VIDEO
Recordable discs	DVD+R, DVD+RW
Recordable time	[DVD] Approx. 1 hour (HQ mode), 2 hours (SP mode), 4 hours (EP mode), 6 hours (SLP mode)
	[VCR] SP: 3 hours (E-180), LP: 6 hours (E-180)
Video recording format
Sampling frequency	27MHz
Compression format	MPEG 2
Audio recording format
Sampling frequency	48kHz
Compression format	MPEG1 Layer2

VCR Specifications

Head system	4 Head Video, 2 Head Hi-Fi helical scan azimuth system
Timer	24-hour display type
Tape speed	SP: 23.39 mm/sec, LP: 11.70 mm/sec
Tape width	12.7 mm
Rewind time	less than 150 seconds (E-180)
Antenna	75 ohms (VHF/UHF)
Channel coverage	VHF: 2-12, 13-20, 74-80 / UHF: 21-69 / CATV: 1-41
Frequency range	20Hz to 20kHz
Video S/N	Over 43 dB (Standard recording)
Audio S/N	Over 65 dB (Hi-Fi), Over 40 dB (Mono)
Resolution	Over 240 lines (Standard recording)

DVD Specifications

Laser system	Semiconductor laser, wavelength 650 nm
Frequency response	DVD (PCM 48 kHz): 8 Hz to 22 kHz, CD: 8 Hz to 20 kHz
Video S/N	More than 60 dB
Audio S/N	More than 90 dB
Harmonic distortion	Less than 0.01%
Dynamic range	More than 90 dB
Resolution	Over 500 lines (HQ Recording)

Inputs

Antenna In/Out	U/V-mixed; 75 Ω unbalanced
Video In	1.0 Vp-p, unbalanced
Audio In	-8.8 dBm
DV In	4 pin (i.LINK/IEEE 1394 standard)

TROUBLESHOOTING

1. POWER CIRCUIT

2

3

TROUBLESHOOTING

2. SYSTEM CIRCUIT

.

32	IC501	IC501
31	IC501	IC501

	IC501
61		IC501
	IC502	IC502

TROUBLESHOOTING

IC501

IC501

(Pin14)

25

4

5

TROUBLESHOOTING

TROUBLESHOOTING

B. DigitalBoard

6

7

TROUBLESHOOTING

C-1. Bad playback quality (1)

Noise appears on the playback screen.

Is noise diminished by tracking adjustment.

YES

Noise band is trembled up and down?

YES

Is there CTL pulse at IC501 pin#97?

NO

NO

NO

Re-adjust PATH.

Noise appears on the screen even though changing tape.

Is the height of CTL HEAD normal?

No dust?

	YES
			Re-adjust PATH.
	NO
			Re-adjust the height of AC HEAD.
			Remove the dust.

YES					YES
Check IC501.			Is there problem in CTL Input				Check C510,R545~R547
			circuit and amplifier.				IC 501 pin #91, 92, 98.

C-2. Bad playback quality (2)

Noise appears on the Full

Recheck step B-1

playback screen.

(Bad playback quallty (1)).

YES

NO

NO

Are SW pulse and HA SW normal?

Are there SW, HA SW pulse at

IC501 pin #16, 18?

Check IC501.

YES

YES

Check PCB Pattern.

ENVE Wave at P502 pin #4?

NO

Check HEAD AMP connector

and HEAD.

YES

Check VIDEO circuit.

TROUBLESHOOTING

D. No broadcasting signal received

No broadcasting signal received

YES

Is the output at IC501 pin# 61(CLK), 60 (DATA) normal?

YES

Is SIF,Video output at TMI(RF101) pin#16,19 normal?

YES

Is Video Signal input at IC501

pin#56?

YES

Is there Video output at P100

pin#1?

NO

Check IC 501.

NO

Check TMI (RF101) Block.

NO

Check IC301.

NO

Check P100

YES

Check Video Buffer Q670, Q671

8

9

TROUBLESHOOTING

E. No CASSETTE Loading

Cassette tape isn’t inserted.

Is 5V voltage obtained at Loading				NO		Check at EVER 14V
parts IC501 pin#63?						Check Q850.
YES

Is 14V voltage obtained at Capstan Motor P501 pin#2?

YES

Is 13V voltage obtained at Each parts of Loading Motor?

YES

NO

Check D851 and POWER circuit.

NO		Connect Capstan and Loading Motor.
		Check connector and Capstan Motor.

Replace Loading Motor.

F. AUTO STOP in Playback mode

VCR stops automatically in playback mode.

Is there REEL Pulse at IC501		NO
pin#79, 80?

YES

Check S501, S502 REEL Sensor.

Is D.PG/FG pulse at IC501 pin#90 normal ?

YES

Is C. FG pulse at IC501 pin#87 normal ?

YES

Check and replace IC501.

NO		Check R544,C516 and P501
		pin#11.
NO		Check C.FG(R543,C517) and
		P501 pin#1.

TROUBLESHOOTING

G. DRUM Motor stops

DRUM Motor stops.

Is 14V voltage obtained at P501 pin#8?

YES

Is DRUM PWM fit to IC 501 pin#76?

YES

Is 2.6V voltage obtained at P501 pin#12?

YES

Check Capstan Motor and

DRUM Motor.

	NO			Check EVER 14V
				(Q850).
	NO			Check DRUM PG/FG
				(IC 501 pin# 90).
	NO
				Check R534,R535,C519,C520.

H. CAPSTAN doesn’t rotate

CAPSTAN doesn’t rotate.

Is EVER 14V voltage obtained at P501 pin#2?

YES

Is Capstan PWM fit to

IC501 pin#77?

YES

Is 3.2V voltage obtained at P501 pin#5?

YES

Is 2.7V voltage obtained at P501 pin#9?

Check P501 Connector and

Capstan Motor.

	NO		Check EVER 14V.
			(Q850)
	NO		Check Capstan FG
			(IC 501 pin# 87).
	NO		Check
			R541,R540,R539,R538,C518
	NO
			Check R537,R536,C521

10

11

TROUBLESHOOTING

3.VIDEO circuit

A. EE screen doesn’t appear

EE MODE Picture NG

	YES								NO
	Is Video signal input at
	IC301 pin#48,50,52,54?
	YES								NO
	Is 5V supplied at
	pin#42,55,72,91of IC301?
	YES								NO
	Is C.S, DATA, CLOCK signal
	input pin#67,68,69 of IC301?
	YES								NO
	Is signal output from pin#65 of
	IC301?
	YES								NO
	Is signal input into pin#13
	of P100?
	YES								NO
	Is signal output from pin#1
	of P100?
	YES								NO
	Is signal input at IC301
	pin#56?
	YES								NO
	Is signal output at IC301
	pin#61?

Check IF and SCART JACK.

Check POWER circuit.

Check IC501 pin #58,66,67

Check IC301 pin#62 Q-V Sync.

Check PCB Pattern.

Check MPEG circuit.

Check PCB Pattern.

Check IC301.

	YES
	Check	.	Check PCB Pattern & LINE
			out.

TROUBLESHOOTING

B.Playback picture doesn’t appear

1)No VCR Playback Picture

PB video signal missing.

YES

NO

Is Envelope output from IC301

NO

Is 5V supplied at IC301 pin#91?

pin#79?

YES

Is SW Pulse input at IC301

NO

pin#70?

YES

YES

Is Y SIGNAL output at IC301 pin#46?

YES

Is Y SIGNAL input at IC301 pin#43?

YES

Is VIDEO SIGNAL output at IC301 pin#65?

NO

Is 5V obtained at IC301 pin#24,

NO

42,55,72,91?

YES

Check and Replace IC301.

YES

NO

Does X301(4.43MHz)

oscillate?

NO

NO

Check PATTERN

NO

Check and replace IC301.

Check POWER 5V.

Check IC501 pin#18.

Clean head or Replace head.

Check POWER 5V.

Check PATTERN

Replace X301.

YES

Same as EE MODE check.

12

13

TROUBLESHOOTING

2) No DVD Playback Picture

No DVD Video signal

YES				NO				NO
Are there video signal at pin						Check PC01, ICN01(CVBS out,				Check PC05, P821, 5V, 12V
#1,3,5,7,9,11 of P100?						Y/C Out, Component Out)				Power and cable connection

YES
Are there video output signal at				NO		CVBS: Check Pin #61 of
JK601, JK101, JK102.						IC301

RGB : Check Pin #21, 23,25

(Y.Pb, Pr),28,31 of IC103 (Y/C)

TROUBLESHOOTING

14

15

TROUBLESHOOTING

2) VCR Part

Record video signal poor.

Check EE MODE.

YES
Is luminance and color signal				NO		Is signal input into IC301
output from IC301 pin#78?						pin# 48,50,52,54,56?

YES

Is +5V supplied at IC301 pin#91?

YES

Is IC301 pin#80 REC(H) HIGH?

YES

Is VIDEO SW Pulse input at IC301

pin#70?

YES

Is REC signal output from IC301 pin#94,95,89,90?

LP MODE: 89,90 Pin

SP MODE: 94,95Pin

NO	Check POWER circuit.
NO	Check IC501 pin#45.

NO	Check IC501 pin#18.

NO	Replace IC301.

Check video HEAD and Connector.

TROUBLESHOOTING

4.AUDIO (Hi-Fi MODEL)

A. No sound in E-E mode a. RF E-E

No sound in RF E-E mode

Is 5V obtained at IC051 pin#1?

YES

NO

Check Power circuit.

Is there SIF signal at IC051 pin#2

NO

in RF mode?

Check RF101.

YES

Is there SIF signal out at IC051

NO

Check IC051.

pin#30, 31?

YES

Is 12V obtained at IC251 pin#34?

NO

YES

Check POWER circuit.

Is 5V obtained at IC251 pin#40?

YES

NO

Is Audio signal output at IC251

Are CLK and DATA obtained at

YES

Replace IC251.

pin#16,17?

IC251 pin#42,43?

YES

Is Audio signal output at IC602 pin

NO

Check IC602.

#3, 13?

YES

Check Output JACK.

16

17

TROUBLESHOOTING

b. AV1 E-E

No sound in AV1 E-E mode.

YES

Is 12V obtained at IC251 pin#34?
			NO		Check POWER circuit.
YES
Is 5V obtained at IC251 pin#40?

Is Audio signal at IC251 pin#6, 7?

NO

Check Input AV1 JACK

YES

NO

Is Audio signal output at IC251

Are CLK and DATA obtained at

YES

Replace IC251.

pin#16,17?

IC251 pin#42,43?

YES

NO

Is Audio signal output at IC602 pin

Check IC602.

#3, 13?

YES

Check Output JACK.

TROUBLESHOOTING

c. AV2 E-E

No sound in AV2 E-E mode.

YES

Is 12V obtained at IC251 pin#34?
			NO		Check POWER circuit.
YES
Is 5V obtained at IC251 pin#40?

Is Audio signal at IC251 pin#8, 9?

NO

Check Input AV2 JACK

YES

NO

Is Audio signal output at IC251

Are CLK and DATA obtained at

YES

Replace IC251.

pin#19, 20?

IC251 pin#42,43?

YES

NO

Is Audio signal output at IC602

Check IC602.

pin #3, 13?

YES

Check Output JACK.

18

19

TROUBLESHOOTING

d. DVD E-E

No sound in DVD

E-E mode.

Is there DVD Audio at IC102 pin#7,8?

YES

Is 12V obtained at ICD02 pin#8?

NO

Check IC102, MPEG board

NO

Check POWER circuit.

YES

Is DVD Audio signaloutput at

ICD02 pin#1,7?

YES
Is Audio(DVD) signal at IC602
pin#5,14?
YES
Is Audio signal output at IC602 pin					NO		Check IC602.
#3,13?

NO

Check ICD02.

NO

Check ICD02.

YES

Check Output JACK.

TROUBLESHOOTING

e. FRONT E-E

No sound in FRONT E-E mode.

YES

Is 12V obtained at IC251 pin#34?
			NO		Check POWER circuit.
YES
Is 5V obtained at IC251 pin#40?

Is Audio signal at IC251

NO

Check Input FRONT JACK

pin#10,11?

YES

NO

Is Audio signal output at IC251

Are CLK and DATA obtained at

YES

Replace IC251.

pin#19, 20?

IC251 pin#42,43?

YES

NO

Is Audio signal output at IC602 pin

Check IC602.

#3, 13?

YES

Check Output JACK.

20

21

TROUBLESHOOTING

B. No NORMAL AUDIO playback in record/playback mode(Check in REC mode)

No Normal Audio playback in record/playback mode

Are there Audio signal at IC251 pin#2~11?

YES

Is there recording signal at IC251 pin#21?

YES

Signal at IC251 pin#21 is transferred to

IC301 pin#13,15,17?

YES

REC (H) BASE voltage at Q206 is 5V?

YES

Collect signal at C222 is about 70Vp-p at 70KHz?

YES

Check P201 pin#2, 4, 8 and A/C HEAD.

	NO			Check Input SCART JACK.
				Check Input Front JACK.
				Check ICD02(DVD)
	NO
				Check IC251.
	NO
				Check signal flow circuit.
	NO			Check IC501 pin#45.
	NO
				Check Q203.

TROUBLESHOOTING

C. No Hi-Fi Playback audio(PLAY MODE)

Is 12V obtained at IC251 pin#34?

				NO		Check POWER circuit.
YES
Is 5V obtained at IC251 pin#40?

Is Audio signal at IC251 pin#41?

NO

Check A.SW at IC501

pin#19.

YES

NO

Is Audio signal output at IC251

Are CLK and DATA obtained at

YES

Replace IC251.

pin#16,17?

IC251 pin#42,43?

YES

NO

Is Audio signal output at IC602 pin

Check IC602.

#3, 13?

YES

Check Output JACK.

22

23