Philips A10PTV2.0 NTSC AA Service Manual

Colour Television Chassis

A10PTV2.0

NTSC AA

Contents Page Contents Page

1. Technical Specifications, Connection Facilities and Chassis Overview 2

2. Safety Instructions, Warnings and Notes 4

3. Directions For Use (Not Applicable) 5

4. Mechanical Instructions 5

5. Faultfinding and Repair Tips 7

6. Block Diagram, Wiring Diagram and Testpoints Block Diagram 13 Testpoint Overview LSB Panel 14-15 Waveform Overviews 16 Testpoint Overview SSM Panel 17-18 Wiring Diagram 19 Supply Distribution Diagram 20

7. Electrical Diagram’s en PWB’s Diagram PWB Large Signal Panel (Section 1) 21 24-29 Large Signal Panel (Section 2) 22 24-29 Large Signal Panel (Section 3) 23 24-29 CRT Red 30 33 CRT Blue 31 33 CRT Green 32 33 Small Signal Board (Section 1) 34 45-50 Small Signal Board (Section 2) 35 45-50 Small Signal Board (Section 3) 36 45-50 Small Signal Board (Section 4) 37 45-50 Small Signal Board (Section 5) 38 45-50 Small Signal Board (Section 6) 39 45-50 Small Signal Board (Section 7) 40 45-50 Small Signal Board (Section 8) 41 45-50 Small Signal Board (Section 9) 42 45-50 Small Signal Board (Section 10) 43 45-50 Small Signal Board (Section 11) 44 45-50 Side jack panel 51 52 Analog SSB:IF-Video-Sync-Chroma (Diagr. C1) 53 59-60 Analog SSB: Video Features (Diagram C2) 54 59-60

Copyright 2001 Philips Consumer Electronics B.V. Eindhoven, The Netherlands. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.

Analog SSB: Micro Controller (Diagram C3) 55 59-60 Analog SSB: Memory (Diagram C4) 56 59-60 Analog SSB: Audio Processing (Diagram C5) 57 59-60 Analog SSB: Audio Processing (Diagram C6) 58 59-60 Analog SSB: SSB Connector (Diagram C7) 59 59-60 Double Window: PIP (Diagram F1) 61 66-67 Double Window: Tuner (Diagram F2) 62 66-67 Double Window: I/O Processing (Diagram F3) 63 66-67 Double Window: IF-Video-Sync (Diagram F4) 64 66-67 Double Window: V-Chip Processor(Diagram F5) 65 66-67 Double Window: NV-ROM (Diagram F6) 65 66-67 PFC Filter Panel 68 69 SVM Panel 70 71 Center Channel Switch (Diagram K) 72 72 AC Power Switch (Diagram L) 73 73 Local Control 74 75 IR-LED (Keyboard) 76 77

8. Alignments 79

9. Circuit Description and 83 List of Abbreviations 99

10 Spare Parts List 101

Published by TA 0167 Service PaCE Printed in the Netherlands Subject to modification

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3122 785 11241

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Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

1.1 Technical Specifications

Mains Voltage : 90 V - 276 V

Power Consumption : 260 W max Standby consumption : < 3 W Mains Frequency : 50 / 60 Hz (+/- 5%) Tuning System : PLL Reception : NTSC M,

Sound System : BTSC DBX - / 97

Sound Output : 2 x 15W

(+/- 10%)

(3.58 - 4.5)

:FM / FM

(4.5 - 4.72) - / 61

1.2 Connection Diagram

Audio/Video Jack Panels

Rear

ANTENNA IN 75

MONO/L

VIDEO

AUDIO

CENTER CHANNEL AMP INPUT

AMP SWITCH

EXT

INT

AV2 INAV1 INMONITOR OUT

S-VIDEO

SUBWOOFER

Side

CL 06532143_001.eps

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AV2 In (SVHS)

1 - gnd 2 - gnd 3 - Y 1 Vpp / 75 ohm 4 - C 0.3 Vpp / 75 ohm

Monitor Out

1 - Video 1 Vpp / 75 ohm 2 - Audio L (0.5 Vrms / 10 k ohm) 3 - Audio R (0.5 Vrms / 10 k ohm)



  

  

Figure 1-1

1.2.1 Side Connections

SVHS

1 - gnd 2 - gnd 3 - Y 1 Vpp / 75 ohm 4 - C 0.3 Vpp / 75 ohm

Audio / Video

1 - Video 1 Vpp / 75 ohm 2 - Audio Left (0.2 Vrms / 10 k ohm) 3 - Audio Right (0.2 Vrms / 10 k ohm) 4 - Headphone 32 - 2000 ohm / 10 mW

1.2.2 Rear Connections

AV1 In

1 - Video 1 Vpp / 75 ohm 2 - Audio L (0.5 Vrms / 10 k ohm) 3 - Audio R (0.5 Vrms / 10 k ohm) 4 - Y 0.7 Vpp / 75 ohm 5 - Pb 0.7 Vpp / 75 ohm 6 - Pr 0.7 Vpp / 75 ohm

AV2 In

1 - Video 1 Vpp / 75 ohm 2 - Audio L (0.5 Vrms / 10 k ohm) 3 - Audio R (0.5 Vrms / 10 k ohm)

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  

   

     

  

Technical Specifications, Connections, and Chassis Overview

Side J

Blue CR

C P

1.3 Chassis Overview

ack

Side J

Panel

Center Channel Switch

Red CRT

Green CRT

SVM Panel

Blue CR

Keyboard & IR LED Panel

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AC P

ower

Switch Panel

PIP Panel

SSB Module

SSM Panel

LSB Panel

Figure 1-2

Filter Panel

CL 16532050_001.eps

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Safety Instructions, Warnings and Notes

2. Safety Instructions, Warnings and Notes

2.1 Safety Instructions for Repairs

• Safety regulations require that during a repair: – The set should be connected to the mains via an

isolating transformer;

– Safety components, indicated by the symbol

should be replaced by components identical to the original ones;

– When replacing the CRT, safety goggles must be

worn.

• Safety regulations require that after a repair the set must be returned in its original condition. In particular attention should be paid to the following points. – General repair instruction: As a strict precaution, we

advise you to resolder the solder joints through which the horizontal deflection current is flowing, in particular a. All pins of the line output transformer (LOT); b. Fly-back capacitor(s); c. S-correction capacitor(s); d. Line output transistor; e. Pins of the connector with wires to the deflection

coil;

f. Other components through which the deflection

current flows. Note: This resoldering is advised to prevent bad connections due to metal fatigue in solder joints and is therefore only necessary for television sets older than 2 years.

– The wire trees and EHT cable should be routed

correctly and fixed with the mounted cable clamps.

– The insulation of the mains lead should be checked

for external damage.

– The mains lead strain relief should be checked for its

function in order to avoid touching the CRT, hot components or heat sinks.

– The electrical DC resistance between the mains plug

and the secondary side should be checked (only for sets which have a mains isolated power supply). This check can be done as follows:

1. Unplug the mains cord and connect a wire between the two pins of the mains plug;

2. Set the mains switch to the "on" position (keep the mains cord unplugged!);

3. Measure the resistance value between the pins of the mains plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be between 4.5 M9 and 12 M9

4. Switch off the TV and remove the wire between the two pins of the mains plug.

– The cabinet should be checked for defects to avoid

touching of any inner parts by the customer.

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2.2 Maintenance Instruction

It is recommended to have a maintenance inspection carried out by a qualified service employee. The interval depends on the usage conditions:

• When the set is used under normal circumstances, for example in a living room, the recommended interval is 3 to 5 years.

• When the set is used in circumstances with higher dust, grease or moisture levels, for example in a kitchen, the recommended interval is 1 year.

• The maintenance inspection contains the following actions: – Execute the above mentioned 'general repair

instruction'.

– Clean the power supply and deflection circuitry on

the chassis.

– Clean the picture tube panel and the neck of the

picture tube.

2.3 Warnings

•ESD

• Available ESD protection equipment:

• Be careful during measurements in the high-voltage

• Never replace modules or other components while the

• When making settings, use plastic rather than metal

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All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at this same potential.

– Complete kit ESD3 (small table mat, Wristband,

Connection box, Extension cable and Earth cable) 4822 310 10671

– Wristband tester 4822 344 13999

section and on the picture tubes.

unit is switched on.

tools. This will prevent any short circuits and the danger of a circuit becoming unstable.

2.4 Notes

• The direct voltages and oscillograms should be measured with regard to the tuner earth (



) as this is called.

(

• The direct voltages and oscillograms shown in the diagrams are indicative and should be measured in the Service Default Mode (see chapter 5) with a colour bar signal and stereo sound (L: 3 kHz, R: 1 kHz unless stated otherwise) and picture carrier at 475.25 MHz.

• Where necessary, the oscillograms and direct voltages are measured with ( Voltages in the power supply section are measured both for normal operation ( values are indicated by means of the appropriate symbols.

• The picture tubes PWB have printed spark gaps. Each spark gap is connected between an electrode of the picture tube and the Aquadag coating.

• The semiconductors indicated in the circuit diagram and in the parts lists are completely interchangeable per position with the semiconductors in the unit, irrespective of the type indication on these semiconductors.



) and without aerial signal ().



) and in standby (). These

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), or hot earth

3. Directions for Use

PHILIPS

4. Mechanical Instructions

4.1 Disassembly Procedures

All numbers found in the following text refer to the CABINET DISASSEMBLY EXPLODED VIEW drawing and apply to all models.

NOTE: If you are only servicing a PCB or speaker, you do not have to remove the plastic upper back cover.

CABINET DISASSEMBLY EXPLODED VIEW

Directions for Use

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PHILIPS

Optical Assembly

4.1.1 Removal of Upper Back Cover (2)

1. Remove 8 screws (A).

2. Remove 3 screws (B).

3. Lift cover up to dislodge from pegs (J) and remove cover.

4.1.2 Removal of Lower Center Back Cover (1)

1. Remove 3 screws (B).

2. Remove 8 screws (C).

4.1.3 Removal of Mirror Mounting Board (18)

1. Remove 6 screws (D) located in the mirror mounting board and remove the board.

NOTE: Care should be taken NOT to place fingerprints or smudges on mirror.

4.1.4 Removal of Plastic Light Barrier (16)

1. Remove two screws (E) located at the sides of the Plastic Light Barrier.

Right

Left

CL 06532143_003.eps

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Figure 4-1

4.1.5 Removal of Side Back Covers (3)

NOTE: To gain access to the Side Jack Panel (D) and two

Speakers, remove the Left Side Back Cover. To gain access to the AC Power Switch Panel (L), remove the Right Side Back Cover.

1. Remove 4 screws (F) from each of the Side Back Covers.

4.1.6 Removal of Large Signal Panel (A)

1. Pull 3 tabs on right of bracket and 2 tabs on left of bracket.

2. Lift Large Signal Board up and out.

4.1.7 Removal of PFC Filter Panel (G)

1. Remove 4 screws from CBA.

2. Lift PFC Filter Panel up and out.

4.1.8 Removal of Small Signal Panel (C)

1. Remove 2 screws from the middle of the CBA.

2. Pull 3 tabs on right of bracket.

GB 6 A10PTV2.0 NTSC4.

3. Lift Small Signal Board up, then to the right to remove.

4.1.9 Removal of Side Jack Panel (22) (D)

1. Remove Left Side Back Cover.

2. Pull tabs in; press Side Jack Panel out.

3. Remove two screws from panel.

4. Slide Side Jack Panel CBA out of bracket.

4.1.10 Removal of AC Power Switch Panel (L)

1. Remove Front Baffle (30) by gently pulling baffle frame away from cabinet.

2. Remove Right Side Back Cover.

3. Remove 2 screws from panel.

4. Remove 2 plugs 1000 & 1002.

5. Pull panel out front of set.

4.1.11 Removal of Center Channel Switch Panel (K)

1. Remove 3 screws from panel.

4.1.12 Removal of Double Window PIP Panel (F)

1. Remove 3 screws from panel.

Mechanical Instructions

4.1.13 Removal of Analog SSB (E)

1. Pull frame up.

2. Pull board to right and then up.

4.1.14 Removal of Front Control

1. Remove front speaker baffle (30) by gently pulling baffle frame away from cabinet.

2. Remove 3 screws from front control.

4.1.15 Removal of Euro SVM Panel (J)

1. Press 3 treelocks to remove Euro SVM board.

4.1.16 Removal of Complete Optical Assembly or Individual Light Box Assemblies.

1. Remove the Plastic Light Barrier (16).

2. Separate CRT CBA's from assemblies to be removed.

3. To remove the complete Optical Assembly, loosen 4

screws (G) located in the assembly, and lift assembly up and out.

4. To remove individual Light Box assemblies, loosen 4

screws (H) located in the assembly you wish to remove and lift assembly up and out.

Fault Finding and Repair Tips

5. Fault Finding and Repair Tips

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The lowing topics are covered:

• Test points

• Service Modes

• Error code buffer and error codes

• The “blinking LED” procedure

• Trouble shooting tips

• Customer Service Mode

5.1 Test Points

The A10 PTV chassis is equipped with test points shown on the schematic diagrams. Each test point has a reference number indicating the schematic diagram on which it is located.

• A F106, A I126, etc.: Test points for the Large Signal Panel [A1 - A3]

• C F001, C I001, etc.: Test points for the Small Signal Panel [C1 - C11]

• G F114, G I001, etc.: Test points for the PFC Filter Panel [G]

• J F004, J F006, etc: Testpoints for the SVM Panel [J]

• K I001, K I002: Test points for the Center Channel Switch [K]

• M I004, M I005: Test points for the Local Control [M]

Measurements should be performed under the following conditions: Video: color bar signal Audio: 3kHz left, 1kHz right Note:The measurements at the following test points were taken using a 100:1 probe:

• A I142

• A I220

5.2 Service Default Mode (SDM)

5.2.1 Introduction

The Service Default Mode (SDM) is a technical aid for the service technician. The Service Default Mode (SDM) establishes fixed, repeatable settings of customer controls, which allow consistent measurements to be made. The SDM also initiates the blinking LED procedure and, if necessary, overrides the 5V protection. This mode also allows the operating hours, the software version and error codes to be read.

5.2.2 Entering Service Default Mode

To enter the Service Default Mode, press the following key sequence on the remote control transmitter:

0-6-2-5-9-6-MENU

Do not allow the display to time out between entries while keying the sequence. Upon entry into the Service Default Mode, the letters “SDM” will be displayed at the upper right corner of the screen.

Side Jack Panel

Center Channel Switch

PIP Panel

SSB Module

Red CRT

SSM Panel

Green CRT

SVM Panel

LSB Panel

Blue CRT

Keyboard & IR LED Panel

Figure 5-1

5.2.3 Special SDM Functions

Access to Normal User Menu

Pressing the “MENU” button on the remote control switches between the SDM and the normal user menus (with the SDM mode still active in the background)

Run Timer, Software Identification, and Error Buffer

Press the Index or status button on the remote control to toggle the OSD (except “SDM”) ON and OFF to prevent the OSD from interfering with measurements and oscilloscope waveforms.

Access to SAM

To access the Service Alignment Mode while in the SDM press the “VOLUME +” and “VOLUME -“ buttons on the local keyboard simultaneously for at least 4 seconds.

5.2.4 Exiting Service Default Mode

Filter Panel

CL 16532050_001.eps

AC Power Switch Panel

090501

The SDM Places the Set in the Following Pre-defined Conditions:

• Tuning frequency set to channel 3.

• Volume level set to 25% (of the maximum volume level).

• Other picture and sound settings set to 50% (mid-range).

The Following Functions are Turned Off in SDM (and After Leaving SDM):

•Timer

• Sleep timer

The Following Functions are Disabled During SDM (and Enabled After Leaving SDM):

• Parental lock

All other controls operate normally.

To exit the Service Default Mode, press the Power button.

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Fault Finding and Repair Tips

5.3 Service Alignment Mode (SAM)

5.3.1 Introduction

The Service Alignment Mode (SAM) is used to align the set and/or adjust the option settings and to display/clear the error code buffer values.

Entering Service Alignment Mode

To enter the Service Alignment Mode (SAM), press the following key sequence on the remote control transmitter: 0-6-2-5-9-6-INDEX or status. Do not allow the display to time out between entries while keying the sequence It is also possible to enter the Service Alignment Mode by pressing the “VOLUME +” and “VOLUME -” key on the local keyboard simultaneously for at least 4 seconds when the set is in SDM.

5.3.2 Exit SAM:

To exit the Service Alignment Mode, press the Power button. In SAM the following information is displayed on the screen:

Figure 5-2

5.3.3 Explanation Notes/References:

1. Operation Hours (Run Timer):

• This display indicates the accumulated total of operational hours. (Shown in hexadecimal format)

2. Software identification of the main micro controller (A101US1-2.06)

• A10 is the engineering chassis name for the A10

PTV chassis

• 1US1 is a character combination to indicate the

software type and the supported languages: 3AP1 or 3AP2 are also possible in the Asian Pacific Region.

• US = United States, AP = Asia Pacific

• 1 = Main Software language version number

• 2.06 = sub-version number

3. Error buffer (7 errors possible):

• Displays the 7 most recent errors. The most recent

error is displayed at the upper left.

4. Option bytes (8 codes possible):

• Summary of options is explained below.

5. Sub menus are listed in a scroll menu.

5.3.4 SAM Menu Control

Menu items may be selected using the cursor UP/DOWN keys.

• The selected item will be highlighted.

• When not all menu items will fit on the screen, pressing the cursor UP/DOWN keys on the remote transmitter will display the next/previous menu items.

CL 16532052_003.eps

090501

With the cursor LEFT/RIGHT keys, it is possible to:

• (de)activate the selected menu item (e.g. GEOMETRY)

• change the value of the selected menu item ( e.g. VERSLOPE )

• activate the selected submenu (e.g. SERV-BLK)

Access to Normal User Menu

Pressing the “MENU” button on the remote control switches between the SAM and the normal user menus (with the SAM mode still active in the background). Pressing the “MENU” key in a submenu will return the screen to the previous menu.

5.4 The Menus and Submenus

5.4.1 Clear Errors

Erases the contents of the error buffer. Select the CLEAR ERRORS menu item and press the cursor LEFT or cursor RIGHT key. The contents of the error buffer are cleared.

The functionality of the OPTIONS and ALIGNMENTS (TUNER, WHITE TONE, GEOMETRY, SOUND, and SMART SETTING) submenus are described in the service adjustments.

5.4.2 Error Code Buffer and Error Codes

Explanation of the Error Code Buffer

The error code buffer contains all errors detected since the last time the buffer was erased. The buffer is written from left to right. When an error occurs that is not yet in the error code buffer, the error code will appear at the left side and all other errors shift one position to the right.

The error code buffer will be cleared in the following cases:

• by activating CLEAR ERRORS in SAM menu

• exiting SDM or SAM with the “Standby" command on the remote control

• upon automatic reset when content has not changed for 50 consecutive hours

By leaving SDM or SAM via the power switch, the error buffer will not be reset.

Examples: ERROR: 0 0 0 0 0 0 0 :No errors detected ERROR: 6 0 0 0 0 0 0 :Error code 6 is the last and only detected error ERROR: 9 6 0 0 0 0 0 :Error code 6 was first detected and error code 9 is the last detected (newest) error

The contents of the error buffer can also be displayed by use of the “blinking LED” procedure, if no picture is available. See explanation of “The blinking LED procedure “below.

5.4.3 Error Code Definition

In case of non-intermittent faults, clear the error buffer before starting the repair, to make sure “old” error codes are not present. If possible check the entire content of the error buffers. In some situations an error code is only the result of another error code (and not the actual cause). Note: a fault in the protection detection circuitry can also lead to a protection.

Error codes 1,2, 3, and 4 are protection codes, and in this case the supplies of some circuits will be switched off. Also in protection, the LED will blink the number of times equivalent to the most recent error code.

Fault Finding and Repair Tips

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5.4.4 Error Code Table

Code Number Error Description

00 Not an Error

01 Too high I-beam or East/West protection

02 Vertical protection

03 X-Ray protection

04 5 volt protection

05 - not used

06 General IIC error

07 BC loop not stabilised

08 Bocma TDA888X IIC error

09 Bocma IC 8v failure

10 NVM IIC communication error

11 Wrong NVM type

12 Microp internal RAM error

13 Main tuner IIC failure

14 Sound IC failure

15 SRAM test failure

16 PIP Tuner IIC failure

17 ECO Pip IC or DW Pip IC failure

18 I/O expander I2C error

19 Gemstar Guide Plus board

20 V-chip located on the DW Pip

21 Non-Volatile clock

22 Incredible picture (YUV) CR

23 Bocma DoubleWindow TDA888X error

24 - not used

25 - not used

26 - not used

27 Virtual Dolby

28 - not used

29 - not used

30 CSP i2c error

31 CSP NVM i2c error

32 CSP NVM error - not valid data

33 CSP dac i2c error

5.4.5 A10 PTV Model Listing & Software

Model Software

43PP925/61 3AP2

43PP925/97 3AP1

55PP925/61 3AP2

55PP925/97 3AP1

Error buffer: 12 9 6 0 0

• After entering SDM:

• The sequence will begin with 1 long blink of 750 mSeconds, then pause 1500 mSeconds, then blink twice (indicating error code 12), then the LED will pause for 3 seconds, then blink 9 times (indicating error code 9), then the LED will pause for 3 seconds, then blink 6 times (indicating error code 6), then pause 3 seconds and blink for 3 seconds again, ending the blinking sequence.

NOTE: If errors 1, 2, 3, or 4 occur the LED ALWAYS blinks indicating the last error which occurred, even if the set is NOT in service mode.

5.6 Customer Service Mode

All A10 PTV sets are equipped with the “Customer Service Mode” (CSM). CSM is a special service mode that can be activated and deactivated by the customer, by request of the service technician/dealer in order to identify the status of the set. This CSM is a 'read only' mode, therefore modifications in this mode are not possible.

5.6.1 Entering the Customer Service Mode.

The Customer Service Mode can be switched on:

• By pressing the MUTE button on the remote control and any key on the local keyboard (Channel Up, Channel Down, VOL +, VOL -) on the TV simultaneously for at least 4 seconds.

When the CSM is activated:

• picture and sound settings are set to nominal levels

• Modes that interfere with the behavior of the set are switched off (sleep timer, auto standby, etc.)

5.6.2 Exit the Customer Service Mode.

The Customer Service Mode will be switched off after:

• Pressing any key on the remote control (except “Channel Up” or “Channel Down”)

• Switching off the TV set by pressing the Power button on the remote control or the local keyboard.

Exiting CSM resets the TV set back to its initial values.

5.6.3 The Customer Service Mode information screen

Upon entry into the Customer Service Mode the following screen will appear.

5.5 The Blinking LED Procedure

The contents of the error buffer can also be made visible through the “blinking LED” procedure. This is especially useful when there is no picture.

• When the SDM is entered, the LED will blink the number of times equal to the value of the error code. Upon entry into the SDM, the LED will blink the contents of the errorbuffer. Error-codes greater than/equal to 10 are shown in the following manner: A long blink of 750 mSeconds indicating the decimal digit, followed by a pause of 1500 mSeconds. The LED will then blink the number equal to the error code. When all error-codes are displayed, the sequence is finished with an LED display of 3 seconds. At this point the sequence will begin again.

Example: Error code position 1 2 3 4 5

CL 16532052_002.eps

Figure 5-3

The Customer Service Menu shows the following information:

090501

GB 10 A10PTV2.0 NTSC5.

Fault Finding and Repair Tips

Line 1 : “HRS : nnnnn” and SWID : “A102BBC-X.YY”

HRS: Indicates the accumulated total of operational hours. (Shown in hexadecimal format.) (Standby hours are not counted as operating hours).

SWID:

Software identification of the main micro controller (A10US1-

2.7) A10 is the chassis name for the A10 PTV

• 1US1 is a character combination to indicate the software type and the supported languages: 3AP1 or 3AP2 are also possible for the Asian Pacific Region.

• US = USA/NAFTA, AP = Asia Pacific region

• 1 = Main Software language version number

• 2.7 = sub-version number

Line 2 : “CODES : xx xx xx xx xx xx xx ”

Error code buffer (see explanation of error codes above) Displays the last 7 errors of the error code buffer.

Line 3 : “OPT xxx xxx xxx xxx xxx xxx xxx xxx”

Option bytes Option bits control the software and hardware functionality of the A10.0. An option byte or option number represents 8 of those bits. Each option number is displayed as a number between 0 and 255. The set may not work correctly when an incorrect option code is set. See Service Adjustments for more information on correct option settings

4. Set to “ADD” with the left/right cursor keys

Line 9 : “HOTELMODE ON”

Indicates that the Hotel mode has been activated.

Line 10 : “SOURCE :”

Indicates which SOURCE is installed for this preset. EXT1, SVHS2, EXT2, Tuner

Line 11 : “SOUND”

Indicates which sound mode is installed for this preset. Mono, NICAM, Stereo, L1, L2, SAP, Virtual or Digital

Line 12 : “VOLUME”