SAMSUNG VP-L905D Service Manual Alignment & Adjustment

Samsung Electronics

2-1

2. Alignment and Adjustment

2-1 Mechanism Alignment

• The location of test point (See Fig.2-1)

Test Point:

PB RF - Pin 11 of CN452
Head Switching Trigger - Pin 9 of CN452

Fig. 2-2 Test location of test point (Rear Board)

Fig. 2-1 Test point

CN452

SW473

J453

SW478

SW477

BAT-TERMINAL

BAT-TERMINAL

SW471

SW474

14

2

13

1

J451

DC-JACK

D451

J452

SUPER-JACK

ONLY Hi8 MODEL

CN452

PB RF

Head Switching - Trigger

CN452

14 13
12 11
10 9

87
65
43

12

2-2

Alignment and Adjustments

Samsung Electronics

POSITION

IC601 IC601 IC601

ACTION MODE

157PIN 158PIN 159PIN

LHH EJECT

LLH UNLOADING STOP
HLL LOADING STOP

HHL PLAY, FF, REW, STILL....

EJECT

UNLOADING STOP

LOADING STOP

PB

IC601

158PIN

GROUND

IC601

159PIN

COMMON

IC601

157PIN

OPEN

EJECT

PLAY

LOADING STOP

UNLOADING

STOP

LOADING

UNLOADING

Fig. 2-3

Table. 2-1

Alignment and Adjustments

2-3

Samsung Electronics

2-2 Camera Adjustment

Note :

1. This system has :

1) EEPROM to store the confirmed adjustment data.

2) DSP (Digital Signal Process ; ICP01 - Main board) chip to process the signal of camera parts.

3) The special mode for camera adjustment using the remote controller.

2. Keep in mind :

1) All adjustment steps should be performed using the remote controller.

2-2-1 Preparations

4. Remote control :

The following is a chart explaining the use of each button :

1. Equipment to be used :

1) DC Power supply

2) Oscilloscope

3) Frequency counter

4) Vectorscope

5) Waveform monitor

6) Color monitor or TV

7) Various charts

- Color bar chart

- Gray-scale chart, etc...

2. Composition of camera P.C.Boards :

1) Main PCB 2) CCD PCB

3) EVF PCB 4) LCD PCB

3. Adjustment preparations :

1) Some buttons of set is used as a camera adjust tool.

2) Press the confirm button when each manual
adjustment step is completed to write the
adjustment data to the EEPROM.

3) After each adjustment step is completed, OSD
shows “OK!”.

4) To cancel the adjustment mode, remove the power
source.

Using Button

ENTER (CONFIRM)
P.AE (DATA UP)
DSE (DATA DOWN)
BLC (MODE UP)
FADE (MODE DOWN)

MANUAL FOCUS RING (NEAR/FAR)
ZOOM TELE

ZOOM WIDE

Adjustment

Data store after finishing adjustment by DATA UP/DOWN button.

When change data value of adjust state.

Mode change.(One step or 100 step)

Manual focus adjustment.

1) Move the zoom position of lens.

2) Semi-Auto lens adjustment.

MENU ON/OFF (MODE UP ‘100’)

Table. 2-2

2-4

Alignment and Adjustments

Samsung Electronics

Note : In service adjustment mode, button names are different from those in customer camera function control

mode. EX) ENTER button is the same as confirm.

5. How to get into service “ADJUST” mode

1. Remove the lithium battery from the
camcorder.

2. Connect the power source (battery/

DC cable).

3. Eject the tape if it is in the unit.

4. Set the power switch of the

camcorder to “CAMERA” position.

STEP 1

1. Press and hold the “EJECT” button and
DATE/TIME button on the camcorder at the
same time for more than 5 seconds.
Then unit goes into service mode.

STEP 2

Note : When “XX XX” is shown in service adjustment procedures, this indicates variable values.

0DF.
ERR : A0 EVR : A0

STEP 3

DATA DOWN

MODE DOWN

MODE UP

DATA UP

MODE ‘100’ UP
CONFIRM
FOCUS

NEAR/FAR

Fig. 2-4

Alignment and Adjustments

2-5

Samsung Electronics

1. Focus to zoom tracking

Notes : To maintain proper focus throughout the zoom range, the focus lens position must be changed as the

zoom lens is moved.

During this adjustment the microprocessor will measure the focus positioning requirements at the wide
and telephoto position of the zoom lens.

1) Camera “E-E”.

2) Focus chart (Attached on the last page of this manual).

3) Aim the camera at the focus chart placed 3 meters away and perpendicular to the center of the lens.
The chart should be placed on the flat, gray or white wall.

4) Connect monitor TV jack to video output jack.

5) Press the “BLC(MODE UP)” and “FADE(MODE DOWN)” button, so that the OSD start is “0DE. 3M LENS XX
XX”.

6) Press “ENTER(CONFIRM)” button.
The camera will move both zoom and focus lens.
The adjustment is finished when the O.K! message appears on the TV screen.
Store the data to mode 099, 09A, 0AA, 0AB, 0AD, 0C9, 0CA, 0CB and 0CC.

2-2-2 Camera System Adjustment

Note : The on-screen display information.

“XX XX” means arbitrary value.
It can be different number depend on the conditions.

0DE XX XX

Fig. 2-5

(Be sure to maintain the distance.)

(3M±1cm)

LENS

CCD

2-6

Alignment and Adjustments

Samsung Electronics

2. Zoom VR Center

1) Camera “E-E”, 3100°K gray-scale chart.

2) Video(output) jack and EVR.

3) Connect monitor TV to video(output) jack.

4) Press the “BLC (MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “OD6. XX
XX”.

5) Press “ENTER(CONFIRM)” button.

6) Then, the microprocessor will work ;

- Find the Zoom VR Center position

- Store the data to mode 0B7.

3. Auto hall

1) Camera “E-E”, 3100°K gray-scale chart.

2) Video(output) jack and EVR.

3) Connect monitor TV to video(output) jack.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “OCD. XX
XX”.

5) Press “ENTER(CONFIRM)” button.

6) Then, the microprocessor will work ;

- IRIS open, HALL maximum value found,

- IRIS closed, HALL minimum value found,

- IRIS open, HALL maximum value found,

- Store the data to mode 00A and mode 00B.

- Store the HALL min./max. data to mode 0C1 and
mode 0C2.

4. AUTO IRIS

1) Camera “E-E”, 3100°K gray-scale chart.

2) Video(output) jack and AF MICOM.

3) Connect video(output) jack to waveform monitor
input jack and monitor TV jack respectively.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “OCE. XX
XX”.

5) Press “ENTER(CONFIRM)” Button.

6) Then, the micro process will work;

- IRIS open, IRIS control minimum Value found.

- IRIS close, IRIS control minimum Value found.

- Store the data to mode 0B5, 0B6, 0C7 and 0C8.

7) The OSD shows “O.K”.

5. Auto white balance

1) Camera “E-E”, 3100°K/5100°K gray-scale chart.

2) Video(output) jack and AF MICOM.

4) Connect vectorscope input jack to video(output)
jack.

3) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “OCF. XX
XX”.

a. W/B Indoor
a-1. Aim the camera at a 3100°K gray-scale chart

illuminated at 1500 to 2000 lx. (40us)

a-2. Press “ENTER(CONFIRM)” button so that the

white vector moves to the center on screen of the

vectorscope.
a-3. Store the data to mode 0A6, 0A7, 0A8, 0A9
a-4. The OSD shows “OK!”.

b. W/B Outdoor
b-1. Aim the camera at a 5100°K gray-scale

(3100°K+CCB12) chart illuminated at 1500 to 2000

lx. (40us)
b-2. Press “ENTER(CONFIRM)” button so

that the white vector moves to the center on

screen of the vectorscope.
b-3. Store the data to mode 0A2, 0A3, 0A4 and 0A5.
b-4. The OSD shows “OK!”.

Center of

white level

100 IRE

Optical

black level

H

40US

Fig. 2-6

Alignment and Adjustments

2-7

Samsung Electronics

6. Pre white balance (I) ; (R-Y)

1) Camera “E-E”, 3100°K gray-scale chart.

2) Video(output) jack and AF MICOM.

3) Connect vectorscope input jack to video(output)
jack.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that pass through 272, 273, 274,
275 and then the OSD state is “272. XX
XX(High)””273. XX XX(Low)”.

5) Aim the camera at a 3100°K gray-scale chart
illuminated at 1500 to 2000 lx.

6) Adjust the “ P.AE(DATA UP)/DSE(DATADOWN)”
button so that the white vector moves to the R-Y
axial on screen of the vectorscope.

Note : Bright dot shifts after the confirm button is

pressed.

7. Pre white balance (II) ; (B-Y)

1) Camera “E-E”, 3100°K gray-scale chart.

2) Video(output) jack and AF MICOM.

4) Connect vectorscope input jack to video(output)
jack.

3) Press the “BLC (MODE UP)/FADE(MODE

DOWN)” button so that the OSD state is “274. XX
XX(High)””275. XX XX(Low)”.

5) Aim the camera at a 3100°K gray-scale chart
illuminated at 1500 to 2000 lx.

6) Adjust the “P.AE(DATA UP) /DSE(DATADOWN)”
button so that the white vector moves to the B-Y
axial on screen of the vectorscope.

Note : Bright dot shifts after the confirm button is

pressed.

8. R-Y Gain

1) Camera “E-E”, 3100°K color bar chart.

2) Video(output) jack and register of EEPROM.

3) Connect video(output) jack to waveform monitor
input jack and monitor TV jack respectively.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “280. XX
XX(High)””281. XX XX(Low)”.

5) Aim the camera at a color bar chart illuminated at
1500 to 2000 lx.

6) Adjust the “P.AE(DATA UP)/DSE(DATA
DOWN)” button so that the red level is
NTSC : 70IRE, PAL : 500mV

7) Be sure to press the “ENTER(CONFIRM)” button to
memorize setting.

Note : Bright dot shifts after the confirm button is

pressed. (outdoor : 034, 035)

Match the white luminance

point with the
black luminance

point

Match the white luminance

point with the

black luminance

point

Fig. 2-7

Fig. 2-8

Match the white luminance

point with the

black luminance

point

Fig. 2-9

70 IRE (NTSC)
500mV (PAL)

Fig. 2-10

2-8

Alignment and Adjustments

Samsung Electronics

9. B-Y Gain

1) Camera “E-E”, 3100°K color bar chart.

2) Video(output) jack and register of EEPROM.

3) Connect video(output) jack to waveform monitor
input jack and monitor TV jack respectively.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “283. XX
XX(High)””284. XX XX(Low)”.

5) Aim the camera at a color bar chart illuminated at
1500 to 2000 lx.

6) Adjust the “P.AE(DA TA UP)/DSE(DATA DOWN)”
button so that the blue level is NTSC :
50IRE, PAL : 350mV

7) Be sure to press the “ENTER(CONFIRM)” button to
memorize setting.

Note : Bright dot shifts after the confirm button is

pressed.
(outdoor : 036, 037)

10. R-Mg Hue

1) Camera “E-E”, 3100°K color bar chart.

2) Video(output) jack and register of EEPROM.

3) Connect video(output) jack to vectorscope input
jack and monitor TV jack respectively.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “284. XX
XX(High)””285. XX XX(Low)”.

5) Aim the camera at a color bar chart illuminated at
1500 to 2000 lx.

6) Adjust the “P.AE(DA TA UP)/ DSE(DA TA DOWN)”
button so that theRed vector is 105.

7) Be sure to press the “ENTER (CONFIRM)” button
to memorize setting.

Note : Bright dot shifts after the confirm button is

pressed.
(outdoor : 038, 039)

11. G-Cy Hue

1) Camera “E-E”, 3100°K color bar chart.

2) Video(output) jack and register of EEPROM.

3) Connect video(output) jack to vectorscope input
jack and monitor TV jack respectively.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “286. XX
XX(High)””287. XX XX(Low)”.

5) Aim the camera at a color bar chart illuminated at
1500 to 2000 lx.

6) Adjust the “P.AE(DATA UP)/ DSE(DATADOWN)”
button so that the Cyan vector is 284.

7) Be sure to press the “ENTER (CONFIRM)” button
to memorize setting.

Note : Bright dot shifts after the confirm button is

pressed.
(outdoor : 03A, 03B)

Fig. 2-12

50 IRE (NTSC)
350mV (PAL)

RED VECTOR
105 DEG.

Fig. 2-11

CYAN VECTOR
284 DEG.

Fig. 2-13

Alignment and Adjustments

2-9

Samsung Electronics

12. B-Cy-Mg Hue

1) Camera “E-E”, 3100°K color bar chart.

2) Video(output) jack and register of EEPROM.

3) Connect video(output) jack to vectorscope input
jack and monitor TV jack respectively.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “288. XX
XX(High)””289. XX XX(Low)”.

5) Aim the camera at a color bar chart illuminated at
1500 to 2000 lx.

6) Adjust the “P.AE (DATA UP)/ DSE(DATA
DOWN)” button so that the Blue vector is 346.

7) Be sure to press the “ENTER (CONFIRM)” button
to memorize setting.

Note : Bright dot shifts after the confirm button is

pressed.
(outdoor : 03C, 03D)

13. Ye-G Hue

1) Camera “E-E”, 3100°K color bar chart.

2) Video(output) jack and register of EEPROM.

3) Connect video(output) jack to vectorscope input
jack and monitor TV jack respectively.

4) Press the “BLC(MODE UP)/FADE(MODE
DOWN)” button so that the OSD state is “28A.XX
XX(High)””28B.XX XX(Low)”.

5) Aim the camera at a color bar chart illuminated at
1500 to 2000 lx.

6) Adjust the “P.AE(DA TA UP) /DSE(DA TA DOWN)”
button so that the Yellow vector is 165.

7) Be sure to press the “ENTER(CONFIRM)” button to
memorize setting.

Note : Bright dot shifts after the confirm button is

pressed.
(outdoor : 03E, 03F)

Note : Outdoor(5100°K) color Gain & Hue adjust.

- 5100°K color bar (or 3100°K color bar with
CCB12 Filter)

- Restart step 7. prewhite balance(I) ~ step 14.
Ye-G Hue.

- The outdoor(5100°K) mode in 034~03F.

BLUE VECTOR
346 DEG.

Fig. 2-14

YELLOW VECTOR
165 DEG

Fig. 2-14

2-10

Alignment and Adjustments

Samsung Electronics

Notes :

1. After each adjustment step is completed, OSD shows “OK”.

2. EEPROM stores confirmed adjustment value of each adjustment step.

3. After finishing the adjustment, reset the main power source to memorize the adjustment data in EEPROM.

4. Camcorder set is used as a LCD adjust tool.

2-3-1 Peraration

1. How to get into the LCD adjustment mode.

Note : When XX XX is shown in service adjustment procedures, this indicates variable values.

2-3 LCD Adjustment

1. Connect the power source (battery/DC
cable).

2. Set the mode switch of the camcorder to
“CAMERA MODE” position.

3. Set OSD on state.

4. Press and hold the “TAPE EJECT” button
and “DATE/TIME” button on the cam­corder at the same time for more than 5
seconds.

Then unit goes into service mode.

STEP1

MONITOR OSD shows “ODF XX XX”. Then
LCD adjustment mode has been activated
successfully and press MODE ‘100’ up button
6times, OSD shows “5F7” and then go back­word to “5E8”

STEP2

5E8

EPR : XX EVR : XX

DATA DOWN

MODE DOWN

MODE UP

DATA UP

MODE ‘100’ UP
CONFIRM

Fig. 2-15

Alignment and Adjustments

2-11

Samsung Electronics

2-3-2 Adjustment

Please, aim at colorbar chart or colorful object.

1. Contrast

1) Adjust ADDRESS that a data of 5E8 is equal to 2E(default). If you want, you can adjust other data in range
“00~35”

2) Adjust ADDRESS that a data of 5E9 is equal to 15(default). If you want, you can adjust other data in range
“00~35” (Adjustment of 5EA, 5EB is in the same way.)

3) Adjust ADDRESS that a data of 5EA is equal to 15(default).

4) Adjust ADDRESS that a data of 5EB is equal to 1A(default).

2. The following chart shows the function of each button. In service adjustment mode, button names are different

from those in customer camera function control mode. EX)DISPLAY button is the same as confirm.

The following table shows the data of each address that you must adjust.

Button

FADE

BLC

P.AE
DSE
ENTER

Function

When change the adjustment mode.

When change the adjustment mode.

When change data value of adjust state.

Data store after finishing adjustment by “DATA UP/DATA DOWN” button

ADDRESS DATA MEAN REMARK ADJUSTMENT RANGE

5E8 2E CONTRAST DEFAULT 00~35
5E9 15 BRIGHT R DEFAULT 00~35
5EA 15 BRIGHT G DEFAULT 00~35
5EB 1A BRIGHT B DEFAULT 00~35

DATA DOWN

MODE DOWN

MODE UP

DATA UP

MODE ‘100’ UP

CONFIRM
FOCUS

NEAR/FaAR

Table. 2-3

Fig. 2-16

Table. 2-4

2-12

Alignment and Adjustments

Samsung Electronics

2-4 EVF Adjustment

2-4-1 Peraration

1. How to get into the EVF adjust mode.

2-4-2 Adjustment

1. Video gain adjustment

1) Connect TP-V on PCB to PROBE.

2) Adjust VRE02 and check that A level is 2.5Vp-p. if not, adjust A level to be 2.5Vp-p.

Notes : When XX XX is shown in service adjustment procedures, this indicates variable values.

1. Connect the power source (battery/DC cable).

2. Set the mode switch of the camcorder to “CAMERA”
position.

3. Disassemble EVF and use oscilloscope to measure
waveform of TP-V.

STEP1

View color bar. (If you have not color bar., you can view
white picture)

STEP2

<Fig. 2-17 Position of TP-V on EVF PCB>

6PIN CONNECTOR

VR

V

<Fig. 2-18 TP-V Wave form>

0.5

A LEVEL

20us

Alignment and Adjustments

2-13

Samsung Electronics

1. Equipment :

1) Monitor TV.

2) Dual trace oscilloscope of over 20MHz band,
incorporates delay mode.
(Use 10 : 1 probe unless otherwise specified.)

3) Frequency counter

4) DC power supply.

5) Alignment tape (Colour bar : SP)

6) 8mm Video Tape for record.

2. Composition of VCR P.C.Boards

1) Main PCB (system control/servo, video, audio,
camera)

2) Rear PCB

3) Front PCB

4) Function PCB

3. How to get into service “ADJUST” mode.

2-5-1 Peraration

1. Connect the power source (battery/DC cable).

2. Set the program selector of the camcorder to PLAYER
position.

3. Press the eject key to eject mode.

STEP 1

1. Press and hold “STOP” and “EJECT” button on the
Camcorder at the same time for more than 5 seconds.

2. If the adjustment mode displayed like the figure below,
VCR adjustment mode has been successfully activated.

3. Insert tape into housing ass’y and then perform the
adjustments.

STEP 2

061.

EPR:XX EVR:XX

TV or EVF/CVF monitor

Address of the adjustment mode.
: there are 061h to 1 ch.(refer xxxx)

Name of the adjustment mode.
: every address have a name like this (refer

xxx)

Present data
: be adjusted before.

New data
: be adjusted newly.

2-5 VCR Adjustment

Fig. 2-19

2-14

Alignment and Adjustments

Samsung Electronics

4. The location of function button.

5. If you want to finish the adjustment mode, you have to do “Battery Reset”.
The “Battery Reset” means that you pull out the power source and pull in it again.
Then, the adjustment is ended and the camcorder works normally.

Note :

In service adjustment mode, button names are different from those in customer function control mode.

EX) “ENTER” button is the same as “CONFIRM”.

DATA DOWN

MODE DOWN

MODE UP

DATA UP

MODE ‘100’ UP
CONFIRM

Fig. 2-20

Alignment and Adjustments

2-15

Samsung Electronics

Note 2 : How to connect video out signal.

-Connect the video cable to ass’y A/V Jack.

2-5-2 VCR Section

Note 1 : From this point forward, the structure of every adjustment is as follows.

Test point

Step Adjustment Item

1. Mode and input signal/
alignment tape

2. Test point and ADJ. part

3. Result and Remarks

ADJ. point

Fig. 2-21 Video Signal Connection

14

13

VIDEO OUT

12
11
10

9
8
7
6
5
4
3
2
1

NC

PB RF

AUDIO OUT

HD SW

VCR UNREG

JIG CS

VCR UNREG

JIG SCK
SS GND

JIG SO

JIG DETECT

JIG SI

AUDIO GND

14

MAIN PCB

REAR PCB

FRONT PCB

CN452

13

12

11

10

9

8

7

6

5

4

3

21

2-16

Alignment and Adjustments

Samsung Electronics

2-2. Head Switching Point

: This adjustment is performed after the replace-

ment of deck mechanism.

• Without this adjustment, there will be a noise in
playback picture.

a. Preparations

b. Connect a power source.
c. Get into the VCR adjustment mode.
d. Press the “BLC(MODE UP)” or “FADE(MODE

DOWN)” button of Camcorder so as to select the
address 061.

e. Insert the Standard Color Bar Tape and press the

“PLAY” button.

Note : If there is no video out, when you pressed the

“PLAY” button, you can not adjust the Head
Switching Point.
It may be caused by maladjusted VIDEO
block.
In this case, adjust the VIDEO block before
the Head Switching Point.

1. Kinds of adjustment in PLAY mode.

2-5-3 Adjustment

ADDRESS NAME

MODEL

NTSC PAL
061
062

HD SWP

Adjustment

1C

Model code setting

063

32. 768 KHZ CLOCK

064

MODEL CODE

065

D.ZOOM SIZE
TBC DEFAULT

05

88

01

2. Adjustment

* Please keep the order according to explanation.
2-1. Setting of the model code0

a. Preparation

b. Connect a power source.
c. Get into the VCR adjustment mode.
d. Press the “BLC(MODE UP)” or

“FADE(MODE DOWN)” button of Camcorder so
as to select the address 063.

e. Press the “DSE(DATADOWN)/P.AE(DATAUP)”

so that OSD shows“ ”ERR:XX EVR: XX” “XX” is
different dependent on the model as below.

f. Be sure to press the “ENTER(CONFIRM)”

button on Camcorder to memorize setting.

g. Reset the power source so as to fix the new data to

the Camcorder’s EEPROM

TAPE

*NTSC

STANDARD COLOR BAR TAPE RECORDED
WITH SP SPEED

POWER SOURCE
NONE
NONE
061
HD SWP

EQUIPMENT
OTHER
TEST POINT
ADDRESS
NAME

TAPE NONE

POWER SOURCE
NONE
NONE
063
MODEL CODE0

EQUIPMENT
OTHER
TEST POINT
ADDRESS
NAME

MODEL NAME ADDRESSED CODE
VP-L900 64
VP-L906 7F
VP-L907 7F

PAL

Table. 2-5

Table. 2-6

Table. 2-7

Table. 2-8

Alignment and Adjustments

2-17

Samsung Electronics

f. The data of Head Switch is set to

6.5H(NTSC)/7.0H(PAL) automatically.

g. Be sure to press the “ENTER(CONFIRM)” button

on Camcorder to memorize setting.

h. Reset the power source so as to fix the new data to

the Camcorder’s EEPROM.

061
EPR : XX EVR : XX<6.5H>

2-18

Alignment and Adjustments

Samsung Electronics

2-6 DECK Adjustment

2-6-1 Operation Without Housing Assembly

Fig. 2-23

Fig. 2-22

1. Remove the Housing Ass’y from the recorder unit.

2. Connect the mechanical chassis to the recorder cir­cuit to supply voltage.

3. Set to Unload mode.

4. Press the S/W Push (Keep ON status) and make
loading.

5. Push the Play key.

Drum side Opposite side Movement of Chassis

+–Loading
–+Unloading

Table 2-9

2-6-2 Setting Mechanical Mode (Without Recorder Circuit)

1. Set the power-supply output to approx. 3V.

2. Choose the polarity (depending on whether loading
or unloading).

3. Supply the voltage to the Motor Loading, and set to
the desired mode.

Note : For the removals of the Housing Ass’y, refer to the

Training Manual (page 4-7).

S/W PUSH

CONNECTED TO THE

RECORDER CIRCUIT

Alignment and Adjustments

2-19

Samsung Electronics

Fig. 2-24

Carry out the following periodic maintenance checks
in order not only to fully exhibit the functions and
operate the set, but also for the equipment and tape.
After repairing, service the set as follows :

1) Cleaning of Drum Assembly

1. Gently apply lens tissue soaked in ethyl alcohol to
the Drum assembly.
Clean the Upper Drum assembly while rotating it
slowly counterclockwise (by hand).

2) Cleaning of Tape Path

1. In EJECT mode, clean the tape path system (from
Pole Tension P1 through Pole Review P7, Pinch
Roller and Capstan Shaft) and the Lower Drum.
Using the lens tissue soaked in ethyl alcohol.

Note : Do not rotate the motor by power or rotate the Upper
Drum assembly clockwise. Also, the Head tip will be damaged if
the lens tissue is moved in a perpendicular direction.
Be sure to follow these instructions when cleaning the Drum
Ass’y.

Note : Make sure that no oil or grease adheres to the lens tis­sue.

P3

P1

P2

P6

P4
P7

PINCH
ROLLER

P5

2-6-3 Maintenance

2-20

Alignment and Adjustments

Samsung Electronics

3) Periodic Maintenance and Check List

When overhauling, refer to the following table.

◆ When lubricating bearings, be sure to keep the oil free
of dust. (Oil contaminated with dust might cause the
bearings to wear out or seize.)

◆ A “drop” of oil is defined as the amount attached to

the tip of a ø 2mm stick as shown in Fig. 2-25.

Maintenance and check items

Hours of use (H)

Remarks

500 1000 1500 2000 2500 3000 3500 4000 4500 5000

Tape path Cleaning of tape path

OOOOOOOOOO

system

Cleaning and degaussing

OOOOOOOOOO

of drum assembly

Capstan Shaft

∆∆∆∆∆

Gear Capstan

∆∆∆∆∆

Driving system Gear Pulley Shaft

∆∆∆∆∆

Belt Timing

◆◆◆◆◆

Motor Loading

◆◆◆◆◆

Performance Abnormal noise

◆◆ ◆◆◆◆◆◆◆

Back tension measurement

◆◆◆◆◆

Confirmation Brake system

◆◆◆◆◆

PB, REV torque

◆◆◆◆◆

measurement

Table 2-10

Fig. 2-25

Be absolutely care­ful not to get oil on

the tape path sur-

face.

O : Cleaning ∆ : Oil ◆ : Confirmation

OIL

ø 2mm

Alignment and Adjustments

2-21

Samsung Electronics

Fig. 2-26

1) Tension Regulator Adjustment

(A) DISASSEMBLY

1. Refer to the Training Manual ( page 4-7) to remove
the Housing Ass’y.

(B) ADJUSTMENT

1. Set to PB mode (without cassette tape).

2. Check that the overlap between external surface of

Chassis Sub and external surface of Arm Tension is
0 ~ 1mm. (Fig. 2-26)

3. If necessary, proceed to step 4.

4. If the Arm Tension 1 is located inside the position

specified, adjust the Band Adjust Tension 2 toward
arrow A.

If it is located outside, adjust toward arrow B.

(C) REASSEMBLY

1. Refer tothe Training Manual ( page 4-7) to mount
the Housing Ass’y.

Hole of Holder Loading

ARM TENSION 1

BAND ADJUST TENSION 2

C

B

A

0~1mm

Note :

Check if the arm tension can be moved toward arrow C in

PB mode. Use the tape which is fed to the end.

2-6-4 Mechanical Check and Adjustment

2-22

Alignment and Adjustments

Samsung Electronics

Fig. 2-27

2) Back Tension Adjustment

1. Set up the cassette-torque tape.

2. Set to PB mode and check that the torque value of
Reel S is 9 ± 1.5g.cm.
(If necessary, proceed to step 3 or 4).

3. If the value is too high : While pushing the adjust­ment claw (rack shape) of Slider Tension toward
arrow C, shift the meshing position (with the claw
of Slider Tension toward arrow A).
See Fig. 2-27.

4. If the value is too low : While pushing the adjust
ment claw (rack shape) of Slider Tension toward
arrow C, shift the meshing position (with the claw
of Slider Tension toward arrow B).
See Fig. 2-27.

3) PB/REV Torque Check

1. Set up the cassette torque tape.

2. Set to PB mode, and check that the torque vlaue of
Reel T is 9 ± 3g.cm.

3. Set to REV mode, and check that the torque value of
Reel S is 25 ± 5g.cm.

4. If necessary, replace the defective reel assembly.

Note : When shifting the position of hooks, remove the cassette

torque tape.

* Remarks : If the cassette torque tape is recorded both in the LP/SP modes by mistake, the torque at the switching point

between SP/LP modes becomes unstable. In that case, do the torque adjustment in REC mode.

Alignment and Adjustments

2-23

Samsung Electronics

REEL S TABLE

RESTING SURFACE

SUB CHASSIS

REEL T TABLE
RESTING SURFACE

Fig. 2-28

4) Reel Table Height Check

(A) REMOVAL

1. Refer to the Training Manual ( page 4-7)
; Remove the Housing Ass’y.

2. Refer to the Training Manual ( page 4-9)

; Remove the Idler Ass’y.

(B) CHECK

1. Using the slide calipers, check the following dis-

tances: The upper surface of the P.C.B Reel to the
Reel S table resting surface and the Reel T table rest­ing surface should each be 5.7 ± 0.2mm.

(C) MOUNTING

1. Refer to the Training Manual ( page 4-9)
; Mount the Idler Ass’y.

2. Refer to the Training Manual ( page 4-7)
; Mount the Housing Ass’y.

2-24

Alignment and Adjustments

Samsung Electronics

Fig. 2-30

1) Preparation for Adjustment

1. Clean the tape running surface (Poles, Drum,
Capstan Shaft, Pinch Roller).

2. Refer to the Service Manual (of camcorder).
Observe the PB RF signal and Head Switching
Pulse on an oscilloscope.

3. Play back the alignment tape.

4. Check that the waveform of the RF signal is flat
both at the inlet and outlet (Fig. 2-29 A).
If not flat (B or C in Fig. 2-29), do adjustments

2) through 5).

Fig. 2-29

REEL S

REEL T

A CORRECT

B DEFECT AT INLET

C DEFECT AT OUTLET

INLET OUTLET

2-6-5 Tape Path Adjustment

Alignment and Adjustments

2-25

Samsung Electronics

2) Tracking Adjustment

1. Play back the alignment tape. (Tracking B or C)

2. Turn P2 to flatten the waveform at the inlet.

3. Turn P5 to flatten the waveform at the outlet.

Fig. 2-31

P2

P5

3) Not Adjustment

1. Play back the alignment tape, and confirm that the
tape is not loosened between the Capstan Motor
and Cuide Roller T.

2. Set to REV mode and observe the outlet waveform
of PB RF signal. (Fig. 2-33)

Fig. 2-32

GUIDE
ROLLER S
(P2)

TAPE SHOULD NOT BE
LOOSENED HERE

P7 CAPSTAN

GUIDE ROLLER T (P5)

Fig. 2-33

(NG) (GOOD)

2-26

Alignment and Adjustments

Samsung Electronics

4) Check After Adjustment

(A) TRACKING CHECK

1. Play back the alignment tape.

2. Then, Confirm that the minimum amplitude value
(E min.) is 65% of the maximum value
(E max.) or larger. (Fig. 2-34)

3. Confirm that no large fluctuations occur on the
waveform. (Fig. 2-35)

Fig. 2-34

E

MIN EMAX

E

MIN

65(%)

E

MAX

(B) CUE AND REV CHECK

1. Play back the alignment tape, and set to REV mode.
Confirm that the waveform peaks have a uniform
pitch. (Fig. 2-36 )

2. Set to CUE mode.
Confirm that the waveform peaks still have a uni­form pitch. (Fig. 2-36 )

Fig. 2-36

a b c

a b c

Fig. 2-35

A

C

C

C

1

A

8

a = b = c

A

>

=

B

<

=

A

Alignment and Adjustments

2-27

Samsung Electronics

(C) RISE TIME CHECK

1. Play back the alignment tape.

2. Set to playback mode, and confirm that the wave­form of PB RF signal rises flatly within 3 seconds.
Also confirm that the tape is not
loosened or curled around the Pinch Roller.
(Fig. 2-37)

3. Run the tape in CUE/REV and FF/REW modes,
then playback. Confirm the waveform of PB RF sig­nal rises flatly within 3 seconds.
Also confirm that the tape is not loosened or curled
around the Pinch Roller.

4. Repeat steps 2. and 3.

(D) TAPE PATH CHECK

1. In CUE and REV modes, check that the tape is not
too curled around the P2 Upper Flange,
P5 Upper Flange, and P7 Upper/Lower Flanges.
(Fig. 2-38)

Fig. 2-37

Fig. 2-38

GUIDE
ROLLER T

TAPE SHOULD NOT BE
LOOSENED OR CURLED HERE

FROM THE REEL S TO THE REEL T

P7

P2

P5 P7

CAPSTAN

2-28

Alignment and Adjustments

Samsung Electronics

MEMO