Siemens VideoRec Service Instructions

VideoRec

Service Instructions

RA53-050.061.01.03.02 English

Replaces: RA53-050.061.01.02.02 08.95

Confié á titre de secret d’ entreprise. Tous droits resérv és. Confiado como secreto industrial. Nos reservamos todos los derechos.

Revisions

Chapter Page Rev.

all all 01 all all 02 all all 03

Siemens AG TDRA 1 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

Table of Contents 0-1

Page

1 General Remarks 1-1

General Remarks/Function Information 1-1 Required Aids/ Tools 1-2

2 Description of Assemblies 2-1

S-VHS Video Recorder (Sony) 2-1 SSI 22 VCR Interface 2-2 VSC 36 SHC Video Scan Converter, 50 or 60 Hz 2-3 Cabling Schematic 2-5

3 Troubleshooting 3-1 4 Repair 4-1

Replacing the Sony Video Recorder 4-1 Replacing the SSI22 VCR Inter face 4-2 Replacing the Video Scan Converter 4-4

5 Adjustment 5-1

General Remarks 5-1 Adjusting the Amplitude Parameters for

VCR Record Mode 5-2 Illustration of the Principle Used for Record Mode 5-2 With HICOR: Adjusting the Amplitudes and Size/Position Parameters for

VCR Playback (Upscan, H Norm). 5-4 With Multistar T.O.P: Adjusting the Amplitudes and Size/Position

Parameters for VCR Playback (Upscan, H Norm). 5-6 With Polytron / Digicor: Adjusting the Amplitudes and Size / Position

Parameters for VCR Playback (Upscan, H Norm). 5-8 Adjusting the Cosine Enhancer 5-10

6 Changes Versus the Previous Edition 6-1

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

0-2 Table of Contents

Page

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

General Remarks 1-1

General Remarks 1

General Remarks/Function Information

● The VideoRec is composed of:

S-VHS Recorder (SVO-9500MD(P) with built-in par allel interface. Scan Converter VSC 36 SHC 50/60. SSi22 VCR interface with cable set.

● With the VideoRec, N or H video signals can be recorded on N-SVHS video

recorders (Sony).

● With H video signals, a downscan selection t akes place automatically in the VSC 36

SHC scan converter.

● Playback takes place via the upscan of the VSC 36 SHC on the H control room

monitor or on the control room and examinat ion room monitors.

● The control of automatic exposure (ci ne/DCM fluoro can be jumpered) takes place

over the SSI22 VCR interface of the X-ra y system(M96, M96C, system distributor)

● The SSI22 VCR interface is powered over the X-r ay system with 24V.

● Automatic monitor switch-over by t he interface, and there is also an automat ic

switch-over to VCR playback in th e interface when there is playback of the S-VHS recorder. If radiation is triggered, the monitors are swi tched over to the X-ray system as a default setting.

● NOTE: If cine is selected while the VCR i s in the playback mode, the video recorder

is switched immediately to record ! This means that any scene being played back will be written over!

● Warning signal generator (in the SSI22 VCR interface),

- when the tape reaches the end

- when there is no video cassette inser ted

- when the VCR power is switched off

- when the VCR is operated manually durin g cine, a warning signal is soun ded.

● Warning output over X4, Pin 6:

- can be switched on/off using a jumper, see paragraph entitled, Recording .

- at the end of the tape

- if no video cassette is in serted

- if the VCR power is switched off

- if the interface po wer is switched off

- if a manual control is made at t he VCR during automatic recording.

● The power line voltage for the VideoRec i s 230V; except for 60 Hz the video recorder

must be connected to 120V.

● For spare parts, see the Video Components Spare Parts List, RA53-050.081.01...

● Note: when setting up the video reco rder, make sure there is good air circul ation

around it. The minimum space between the VCR and the sides of built-in consoles or other components must be at least 3 cm. If two video recorders are conf igured in a biplane system, to permit goo d heat dissipation, under no circumsta nces may they be closer than 3 cm to each other, i .e., they may not be placed next to each other in th e optinally available control console. However it is possible to place one on t op of the other. Pay attention to good air circul ation.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

1-2 General Remarks

Required Aids/Tools

● Standard service tool kit, as def ined in ARTD, Part 3

● Memory oscilloscope, as defined in ARTD, Part 3

● Mavo monitor, as defined in ARTD, Part 3

Part No. 97 02 432 Y0526

● Digital voltmeter, as defined in ARTD, Part 3

● TV Dynamics Test

● BNC connector, Part No. 30 06 590

BNC

NEG

BNC POS

BNC

NEG

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

Description of Assemblies 2-1

Description of Assemblies 2

S-VHS Video Recorder (Sony)

● Recording of N video signals on S-VHS tape s.

● Playback of N-recorded S-VHS tapes.

● Can be remotely controlled over a bui lt-in 34-pin interface.

IMPORTANT: Only the S-VHR recorder (Sony) s hipped with VideoRec has this interface!

● The 60Hz model can be operated only at 120V!

Video input from SSI / XX3

~ AC IN

Video output to SSI / XX4

34-Pin i nterface

REMOTE

75 Ohm terminal resistor *

Power connector socket

* Note: The terminal resistor for the loop-through output must be set to ON.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

2-2 Description of Assemblies

SSI 22 VCR Interface

● LED display of power On.

● 2x optical video separation (re quired, because the video recorder may be operat ed

with a ground wire and ground loops mu st be avoided), for input and output of the video recorder.

● Automatic control of record f unction of the video recorder, dependi ng on the X-ray

system.

● Control of monitor switch- over and of upscan function in the VSC 36 SHC with vi deo

recorder playback.

● Starting with Serial No. 95391, a Cosi nus Enhancer (edge enhancement) for VCR

recording is int egrated.

● Warning signal output to X4 Pin 6. Output “only“ with selection of record!

Monitored functions:

When no cassette is inserted. When the tape is at the end. When there is no power to the inte rface.

If the recorder is manually operated during an automatic recordi ng. Up to Serial No. 95334 the transis tor switches to ground! Starting with Serial No. 95334 or when us ing the repair/replacement proc edure, when there is a warning ground is sent out (via transistor) with OK + 24V over

2.7kOhm .

● For jumpering of the different f unctions, see the section on Repair .

XX1

Video input from VSC 36 SHC X7

XX2

XX3

XX4

Video output to video recorder BAS IN

Video output to VSC 36 SHC X3

Video recorder 34-pin interface

Video input from video recorder BAS OUT

VSC36 SHC X2

KVTR connector (M96 or M96C)

Power switch

Power line connector

Note: The spade connectors on the quick connectors above coax sockets XX1 and XX2 are used to connect the external

shielding of the triax cable. Connector X2 is not used.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

Description of Assemblies 2-3

VSC 36 SHC Video Scan Converter, 50 or 60 Hz

● LED display of power ON.

● NOTE: two different scanners are needed for 50 and 60 Hz video scan rates.

● Automatic recognition of H-line video i nput signals and switch-over to downs can or

bypass with N video signals.

● Adaptation of the different i nput signals to a 1V standard signal for t he video

recorder in the downscan mode.

● Depending on the control by the video recor der or X-ray system

(via the SSI22 VCR interface):

Upscan mode for VCR playback. Monitor switch-over to X-ray syst em or VCR playback.

Adaptation of the 1V

1.4V

for upscan.

video signals from the video recorder to HICOR monitors to

SSI 22 XX2

SSI 22 X3

Note: The spade connectors on the quick connectors above coax sockets XX1 and XX2 are used to connect the external

shielding of the triax cable. Connectors X1 and X10 are not used.

X4 X5

HICOR output “VCR“ or from Examination room Live monitor in DIGICOR systems

SSI 22 XX1

Control room monitor

HICOR output “Mon. 2“

HICOR output “Mon. 1“

X10

Power switch

Power line connector

Examination room monitor

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

2-4 Description of Assemblies

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

Description of Assemblies 2-5

Cabling Schematic

Digital System / TV

N or H, 50 or 60HzExamination room Control room

VSC 36SHC

Jumper

XX2

XX1

VCR Interface SSI22

opt. video separation

fac. settings

7/8 = +24V

2 = Stand By

3 = Record

6 = Warning *1 1/9/10/11/12/13/ 14/15 = Ground

M96 /M96C

System distributo

7/8

Ex. room

Con. room

XX4

OUT

Sony

SVO9500MD(P)

XX3

34-pin connector

*1 Warning signal output, see paragraph

“Description of Assemblies“, SSI 22 VCR Interface .

ggg

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

2-6 Description of Assemblies

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

Troubleshooting 3-1

Troubleshooting 3

S-VHS Recorder, Sony SVO 9500 MD(P)

The recorder is thought of as a black box and must be replaced completely. IMPORTANT: Every returned re corde r must be acco mpnaied by a detail ed descr ip tion

of the malfunction!

SSI22 VCR Interface

No function or only partial function - chec k the power fuses on the rear of the unit (at the power input) and check the internal fuses .

IMPORTANT: Every returned inter face must be ac companied by a det ailed descr iption of the malfunction!

MainFuse

F301

F302

Rückseite / rear side

F 2

F 1

F101

F151

F251

F201

VSC 36 SHC Scan Converter

No function or only partial function - chec k the power fuses on the rear of the unit (at the power input) and check the internal fuses .

IMPORTANT: Every returned scanner must be accompanied by a detailed description of the malfunction!

MainFuse

Rückseite / rear side

F 1 F 2

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

3-2 Troubleshooting

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

Repair 4-1

Repair 4

Replacing the Sony Video Recorder

●

NOTE: Only the model l isted in the Spare Parts List

(RA53-050.081.01...) (additiona l interface) may be used. Only an SVO 9500 MDP (Pal, 230 V) may be used with 50 Hz power

line systems. Only an SVO 9500 MD (NTSC, 120 V) may be used with 60 Hz power line systems.

● Connect the video input / output an d interface cables “as before”.

● Set the 75 Ohm termination switch to ON (no loop-through mode), with connection of

a video printer to OFF (termina tion is in printer).

● Y-Enhancer:

The video recorder is equip ped with a switchable Y-Enhancer (edge enhancement with playback). This enhancer i s set to ON when shipped from the factory and must be switched off as follows:

CTL / MENU - set switch in the “MENU” position .

ITEM - continue to press key until “4 EN-.... ” appears in the display.

DATA - press key until “4 EN--OF” is set. CTL / MENU - set switch back to the “CTR” position.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

4-2 Repair

Replacing the SSI22 VCR Interface

Jumper Positions

Jumper

Starting with Serial No. 95 334 a warning signal is output over socket X4, Pin 6 (used with MULTISTAR T.O.P configured with the cine option). Spare parts have been upgraded.

When used with the Multistar T.O.P. or CARD III, it is always set to “ON“. Setting for “only“ record or for fluoro and record see the Configuration Guide for Multistar T.O.P. or the POLYDOROS IS Service Instruction for CARD III.

Norm

OFF

Function

OFF-Warning signal output when there is a recording error.

ON - No warning signal output with recording error. ON-Playback on control rooml/examination room monitor. OFF-Playback on control room monitor ON- Cine/DCM/Acquisition recording only.

OFF- Fluoro and Cine/DCM/Acquisition recording. Always set to OFF

On - Warning signal when there is a recording err or. OFF - No warning signal with recording error

Cosine Enhancer: Up to Serial No. 95 391 “several“ enhancers were built in ; with these enhancers the switch must be set to the “0 - position“ (off). Starting with Serial No. 95 391, the Cosine Enhancer is fully functional; for adjustment,see the chapter “Adjustment“.

No further adjustments are necessary.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

Repair 4-3

VCR - Interface SSI 22

Switch

X 5/6/7/8/9

1-2 OFF

FINE - 0 - COARSE

COSINE ENHANCER

2-3 ON

Main fuse

Power Supply

Rückseite / rear side

FINE - 0 - COARSE

COSINE ENHANCER

XXX

Interface

Cosine Enhancer

Je nach Seriennummer

depending on Serial No.

OTV

FINE - 0 - COARSE

COSINE ENHANCER

OTV

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

4-4 Repair

Replacing the Video Scan Converter

Connect all inputs/outputs as they were previously connected.

Switch Positions

DIGICOR with control room monitor

S2 OFF ON OFF ON Switchable terminal r esist or for X4 in put S4/5 ON OFF ON OFF Loop-through of X4 input to X6 output S6 OFF OFF OFF ON ON = Bypass Scanner with Power Off.

S7 OFF OFF OFF ON Terminal resistor for X5 input with

Remove Remove Remove Leave Change of the pot entiometer adjust-

DIGICOR without control room monitor

Polytron

Hicor/ Multistar T.O.P.

Function

OFF =No Bypass with Power Off.

UP scan.

ment range for DOWN Scan

* Remove the parallel resistor to R17, see illustration.

J1 to J30 factory settings - specifications for conversion / size / position.

MainFuse

Rückseite / rear side

S5 unter / below S4 if no S5, then

S4 = S4/S5

F 1 F 2

Scan Converter VSC 36

ON - OFF

Parallel resi s to r

(820 Ohm)

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

R17

S2/4/5/6/7

Adjustment 5-1

Adjustment 5

General Remarks

Adjustment is divided into three secti ons:

VCR record mode VCR playback mode Cosine enhancer adjustment.

For adjustment, see below.

Note: The Simomed H monitor has its own set of adjustment parameters for each norm. This means that if necessar y, every norm which i s being used must be adjusted (i mage alignment and contrast)!

e.g. HICOR:

With the HICOR, the 1249 lines /100 Hz (1023 lines/120 Hz) norm is used for the monitor. With the VideoRec, the 1249 lines /50 Hz (1023 lines/60 Hz) norm is used for the monitor. With bypass, the 1249 lines/50 Hz (1023 line/60 Hz) norm is used for the monitor.

e.g. MULTISTAR T.O.P:

With a digital system, 2249 lines/60 Hz are used for the monit or, With bypass, 1125 lines/60 Hz are used for the monitor (the same norm for the monitor as with 2249 lines/60 Hz !!), With the VideoRec, 1249 lines/50 Hz (1023 lines/60 Hz) are used for the monitor.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

5-2 Adjustment

Adjusting the Amplitude Parameters for VCR Record Mode

Illustration of the Principle Used for Record Mode

N and / or H Norm

Digital System

● If a cosine enhancer is configured ( see the Chapter on Replacement), it must be

H Norm

N Norm

Scan Converter

XX1

N Norm

VCR

Interface

OTV

switched off during the adjus tment (in the 0 position).

● Feed in the SMPTE test pattern for the digi tal system.

If a digital system is not conf igured, a recording of the TV dynamic test (rec ord mode) can also be used (field 2L must have the max. amplitude).

● Adjusting the output amplitudes :

Connect the oscilloscope Channel 1 to ou tput X7 using BNC connectors (scan converter), set 200 mV, 5 ms, Trigger int. Channel 1

- If there is “only“ an N input, there is no adjustment.

- With an N input and in the H backup mode (e.g. HICOR) etc. : Measure the BA amplitude with the N Norm and with the H Norm Use P2 to adjust the S portion to 0.3V, +/-30mV. Use P4 to adjust the BA portion to the same value as for the

N Norm, but max. 0.7V, +/- 30mV.

- With “only“ the H Norm: Use P2 to adjust the S portion to 0.3V, +/-30mV. Use P4 to adjust the BA portion to 0.7V, +/ -30mV.

Connect the oscilloscope Channel 1 to ou tput XX3 (VCR Interface) using BNC connectors, set 200 mV, 5 ms, Trigger int. Channel 1

- Use potentiometer R151 for VCR IN (VCR Interface) to adjust to 1V, +/-30mV BAS.

● Adjustment of the downscan size / positi on parameters (horizontal only):

If there is “only“ the N input, th ere is no adjustment. With a H input, carry out the adjustment as follows if needed. Correct adjustment of the upscan si ze/position parameters is prerequ isite, see

paragraph “Use....... ...... : to adjust the amplit ude and size/position parameters“ !!

The setting can only be changed prior to VCR rec ord and can only be evaluated with VCR playback; change the potentiome ter setting only slightly !! Use P6 to adjust the horizontal pos ition, centered on the monitor. Use P8 to adjust the horizontal size ( with a circle, it must be round) .

XX3

VCR

● If a cosine enhancer is configured, it must be switched back on.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

Adjustment 5-3

VSC 36 Scan Converter

Main fuse

Rückseite / rear side

F 1

F 2

X10

Rückseite / rear side

XX4

SSI22 VCR Interface

XX3

XX2

XX1

Power Supply

XXX

Interface

Cosine enhancer

OTV

fom VCR Output

FINE - 0 - COARSE

COSINE ENHANCER

OTV

to VCR Input

OTV

Amplification

for XX3

output

(VCR IN)

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

5-4 Adjustment

With HICOR: Adjusting the Amplitudes and Size/Position Parameters for VCR Playback (Upscan, H Norm).

● If a cosine enhancer is configured ( see Chapter Replacement), it must be switched

off during the adjustment (i n the 0 position).

● Make a dynamics tes t recording with the HICOR.

- Use the Mavo monitor to measure the brightness in Fields 2L and 5R (monitor) and make a note of the results.

● Switch off the HICOR (backup mode) use the Ser vice PC to adjust the ssame

brightness on the monitor as wit h the HICOR (foreground - 2L field/backgrou nd - 5R field, see Simomed H Adjustment Instruc tions).

● With the HICOR switched on, make a VCR recording.

● Play back the recording (Pause - Freeze) .

- Adjusting the OTV amplification (VCR output): Connect the oscilloscope Channel 1 to output XX2 (VCR Interface, from VCR output), set 200 mV, 5 ms, Trigger int. Channel 1 Use potentiometer R251 in the OTV (for XX2 output, see illus tration) to adjust th e BAS amplitudes to 1V BAS, +/-30 mV.

- Adjusting the upscan amplitudes: Connect the oscilloscope Channel 1 to outpu t X6 (output to cont rol room monitor ) of the VSC 36 SHC (parallel to the monitor), set 200 mV, 5 ms, Trigger int. Channel 1. Use P1to adjust the S portion to 0.3 V, +/-30 mV. Mavo monitor: Use P3 in field 5R and use P5 in field 2L to adjust the same brightness as was measured with the dynamics test recording. Alternately repeat the adjustment.

● Adjust the upscan size/position p arameters:

IMPORTANT: This adjustment requires that the monit or be correctly adjusted (each Norm must be adjusted separately !). If necessary, monitor adjustment ca n be carried out as follows: With the Videomed S, select the grid (see Videomed S Ser vice Instructions) set the HICOR to bypass mode, (i.e., 50 or 60Hz Norm is set), carry out a size/ position adjustment for the monit or. With the Videomed C, feed in the grid pattern gen erator; use the same procedure. Or if using the Monitor Multinorm Testb ox, select the grid and Videomed S (50 Hz/ 1249 lines or 60Hz/1023 lines).

- Make a VCR recording using a somewhat smaller collimation (for H and V determination).

- Playback image must be horizontally centered on the monitor and H:V must be correct (with the circle - round, with the collimator - square). If vertical size / position are not adjustable (monitor adjustment may be required). Use P7 to adjust the horizontal position, centered to the monitor. Use P9 to adjust the horizontal size (with the circle, must be round). Alternately readjust the position / size. IMPORTANT: no synchronization problems may occur, e.g. position/size disturbing the synchronization range! If this is the case, use P10 for size and P12 for position and adjust the input parameters (memory) (P7 / 9 = used to adjust the memory output parameters).

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

Adjustment 5-5

● If a cosine enhancer is configured, it must be switched back on.

VSC 36 Scan Converter

Main Fuse

Rückseite / rear side

F 1 F 2

X10

Rückseite / rear side

XX4

P10

P12

SSI22 VCR Interface

XX3

XX2

XX1

FINE - 0 - COARSE

COSINE ENHANCER

XXX

Interface

OTV

Amplification

for XX2

output

(VCR OUT)

Power Supply

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

Cosine enhancer

OTV

fom VCR Output

OTV

to VCR Input

5-6 Adjustment

With Multistar T.O.P: Adjusting the Amplitudes and Size/ Position Parameters for VCR Playback (Upscan, H Norm).

● If a cosine enhancer is configured ( see Chapter Replacement), it must be switched

off during the adjustment (i n the 0 position).

● Make a dynamics test recording with the Polytron T.O.P.

- Use the Mavo monitor to measure the brightness on the monitor in fields 2L and 5R and make a note of the results.

- Make a VCR recording using the dynamics test.

● Play back the recording (Pause - Freeze) .

- Connect the oscilloscope Channel 1 to output XX2 (VCR I nterf ace, f rom VCR out put); set 200 mV, 5 ms, Trigger int. Channel 1.

- Adjusting the OTV amplification (VCR output): Use the potentiomerter in the OTV (for XX2 output, see illustration) to adjust the BAS amplitudes to 1V BAS, +/-30 mV.

- Adjusting the upscan amplitudes: Connect oscilloscope Channel 1 to output X6 (outp ut to the contro l room monitor) of the VSC 36 SHC (parallel to monitor); set 200 mV, 5 ms, Trigger int. Channel 1 Use P1 to adjust the S portion to 0.3 V, +/-30 mV. Use P3 to adjust the A portion of the int. DA

converter to 0V , +5 mV .

Use P5 to adjust theBA portion to 0.7V, +/-30 mV.

int. A signal

0V level

- Adjusting monitor contrast using the VCR: Using the Service PC, set the same brightness on the monitor (foreground - 2L field /background - 5R field, see Simomed H Adjustment Instructions) as was measured for the dynamics test recording. Alternately repeat the adjustment.

● Adjusting the upscan size / positi on paramerters:

IMPORTANT: This adjustment requires that the monit or be correctly adjusted (each Norm must be adjusted separately!) . If needed, the monitor adjustment can be carried out as follows: If using the Monitor Multinorm Testbox, select grid and Videomed S (50 Hz/ 1249 lines or 60Hz/1023 lines).

- Make a VCR recording using a somewhat closed collimator (for H and V determination).

- Playback must be horizontally centered on the monitor and H:V must be correct (with the circle - round, with the collimator, square). If vertical size / position are not adjustable (monitor adjustment may be required). Use P7 to adjust the horizontal position, centered to the monitor. Use P9 to adjust the horizontal size (with circle, it must be round). Alternately repeat the adjustment of position / size. IMPORTANT: No synchronization problems may occur, e.g. posit ion / size disturbing the synchronization r ange! If this is t he case, use P10 for si ze and P12 for position to adjust the input parameters (memory) (P7 / 9 = adjustment of the output parameters of the memory).

● If a cosine enhancer is configured, it must be switched back on.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

Adjustment 5-7

VSC 36 Scan Converter

Main Fuse

Rückseite / rear side

F 1

F 2

X10

Rückseite / rear side

XX4

P10

P12

SSI22 VCR Interface

XX3

XX2

XX1

Power Supply

XXX

Interface

Cosine enhancer

OTV

fom VCR Output

FINE - 0 - COARSE

COSINE ENHANCER

OTV

to VCR Input

OTV

Amplification

for XX2

output

(VCR OUT)

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

5-8 Adjustment

With Polytron / Digicor: Adjusting the Amplitudes and Size / Position Parameters for VCR Playback (Upscan, H Norm).

● If a cosine enhancer is configured ( see Chapter Replacement), it must be switched

off during the adjustment (i n the 0 position).

● Make a dynamics test recording wi th the Polytron / Digicor.

- Use the Mavo monitor to measure brightness in the 2L and 5R fields (monitor) and make a note of the results.

● Switch off the Polytron / Digic or (Emergency - Bypass mode). Use the Service PC to

adjust the same brightness on the monitor (foreground - 2L field/ background - 5R field, see Simomed H Adjustment Instruc tions) as measured with Polytron / Digi cor.

● Switch the Polytron / Digicor on, make a VCR recording.

● Play back the recording (Pause - Freeze) .

- Adjusting the OTV amplification (VCR output): Connect the oscilloscipe Channel 1 to output XX2 (VCR Interface, from VCR output); set 200 mV, 5 ms, Trigger int. Channel 1. Use potentiometer R251 in the OTV (for XX2 output, see illustration) to set the BAS amplitudes to 1V BAS, +/-30 mV.

- Adjusting the upscan amplitudes: Connect the oscilloscope Channel 1to out put X6 (output to control room monitor) of the VSC 36 SHC (parallel to monitor); set 200 mV, 5 ms, Trigger int. Channel 1. Use P1 to adjust the S portion to 0.3 V, +/-30 mV. Mavo monitor: Use P3 in field 5R, use P5 in field 2L to set the same brightness as was measured with the dynamics test recording. Alternately repeat the adjustment.

● Adjusting the upscan size / position par ameters:

IMPORTANT: This adjustment requires that the monit or is correctly adjusted (each Norm must be adjusted separately!) . If necessary, the monitor adjustment can be carried out as follows: With the Videomed S, select the grid (see Videomed S Ser vice Instructions), switch the Polytron / Digicor to Bypass or off, carry out a size/positi on adjustment on the monitor. With the Videomed C, feed in the grid pattern gen erator, same procedure as above. Or with the Monitor Multinorm Testbox , select grid and Videomed S (50 Hz 1240 lines or 60Hz/1023 lines).

- Make a VCR recording with a somewhat smaller collimation (for H and V determination).

- PLayback must be horizontally centered on the monitor and H:V correct (with a circle - round, with the collimator, square). If the vertical size / position are not possible (monitor adjustment may be required). Use P7 to adjust horizontal position, centerd to the monitor. Use P9 to adjust horizontal size (with a circle, it must be round). Repeat the adjustment of position / size alternatingly. IMPORTANT: No synchronization problems may occur, e.g. posit ion / size disturbing the synchronization r ange! If this is t he case, use P10 for si ze and P12 for position to adjust the input parameters (memory) (P7 / 9 = adjustment of the output parameters of the memory).

● If a cosine enhancer is configured, it must be switched back on.

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

Adjustment 5-9

VSC 36 Scan Converter

Main Fuse

Rückseite / rear side

F 1

F 2

X10

Rückseite / rear side

XX4

P10

P12

SSI22 VCR Interface

XX3

XX2

XX1

Power Supply

XXX

Interface

Cosine enhancer

OTV

fom VCR Output

FINE - 0 - COARSE

COSINE ENHANCER

OTV

to VCR Input

OTV

Amplification

for XX2

output

(VCR OUT)

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

5-10 Adjustment

Adjusting the Cosine Enhancer

● In units with Serial Nos. up to 95 391 “some” enha ncers were installed whose switch

must be set to the “0 position“ ( off). Starting with Serial No. 95 391, t he cosine enhancer is fully function al.

● The cosine enhancer is switched on by means of the s witch on the rear of the

interface, or the “type“ of en hancement can be selected.

● The default values for the adju stment are:

Set the switch to FINE Set adjustment element to Position 7

● Depending on the customer‘s reques t or requirement, varations from t his adjustment

can be made: The degree of enhancement can be set using the adjustment element (higher number corresponds to greater enhancement). Calculation of the enhancement can be changed by means of the switch (COARSE corresponds to coarse). Recommendation: Always set the switch to “Fine“ ( low noise).

Set enhancement (adjustment element) max. s o far that a white border around the edges can no longer be seen.

SSI22 VCR Interface

Rückseite / rear side

Power Supply

FINE - 0 - COARSE

COSINE ENHANCER

XXX

Interface

Cosine enhancer

Switch

FINE - 0 - COARSE

COSINE ENHANCER

Depending on Serial No.

OTV

FINE - 0 - COARSE

COSINE ENHANCER

OTV

Setting for enhancement

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 10.95

Changes Versus the Previous Edition 6-1

Changes Versus the Previous Edition 6

● Chap. 1 - 1

Expansion of the general remarks.

● Chap. 1 - 2

Expansion of required aids.

● Chap. 2 - 1

New illustration.

● Chap. 2 - 2

Expansion of the description, new il lustration.

● Chap. 2 - 3

New illustration.

● Chap. 2 - 5

Expansion of cabling.

● Chap. 4 - 1

Expansion of the configuration when the VCR is replaced.

● Chap. 4 - 2/3

Expansion to include the cosine enhancer, as well as the warning signal.

● Chap. 4 - 4

Expansion to include use of the Digicor without a control room monitor.

● Chap. 5

New. Expansion of the adjustment to inc lude image alignment adjustment and cosine enhancer.

TD RA 3/ Rehm

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

6-2 Changes Versus the Previous Edition

Siemens AG TD RA 3 RA53-050.061.01 VideoRec Medizinische Technik Rev. 03 08.95

Siemens VideoRec Service Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual

General Remarks 1-1

General Remarks/Function Information

Required Aids/Tools

Description of Assemblies 2-1

S-VHS Video Recorder (Sony)

SSI 22 VCR Interface

VSC 36 SHC Video Scan Converter, 50 or 60 Hz

Cabling Schematic

Troubleshooting 3-1

S-VHS Recorder, Sony SVO 9500 MD(P)

SSI22 VCR Interface

VSC 36 SHC Scan Converter

Repair 4-1

Replacing the Sony Video Recorder

Replacing the SSI22 VCR Interface

Replacing the Video Scan Converter

Switch Positions

Adjustment 5-1

General Remarks

Adjusting the Cosine Enhancer

Changes Versus the Previous Edition 6-1