Panoramic TVP-2905AS Service Manual

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SERVICE MANUAL Colour Television

Specifications

Power Source . . . . . . . . .AC220V, 50Hz / 60Hz

Receiving System . . . . . .PAL (M/M, N/N), NTSC (M/M)

Channel Coverage

Antenna mode VHF: CH02-CH13, UHF: CH14-CH69

CATV mode

VHF band: CH01-CH13, Mid band: CH14-CH22

Super band: CH23-CH36, Hyper band: CH37-CH64

Ultra band: CH65-CH94 and CH100-CH125

Low mid band: CH95-CH99

Video IF . . . . . . . . . . . . . 45.75MHz

Aerial Input Impedance . . 75Ω

Ext. Terminals

Video inputs: Phono jack

Audio inputs: Phono jack (R/L)

Headphone Jack: Mini stereo jack

Sound Output (RMS) . . . . 3W + 3W

Speakers . . . . . . . . . . . 5cm x 9cm x 2 pcs.

Dimensions . . . . . . . . . 656(W)

Weight . . . . . . . . . . . . . approx. 31.7 Kg

Specifications subject to change without notice.

F5AP

L-AUDIO-R

VIDEO

- VOL +

2 (1Vp - p, 75Ω)

2 (436mVrms, more than 40KΩ)

600(H)

496(D)mm

Panoramic

FILE NO.

Model No. TVP-2905AS

Service Ref. No. TVP-2905AS-00

JXMRR

Product Code: 111334312

Original Version

Chassis Series: LA5-A

Give complete "SERVICE REF. NO." for parts

order or servicing. It is shown on the rating

plate at the cabinet back of the unit.

This T.V. receiver will not work properly in

foreign countries where the television trans-

mission system and power source differ from

the design specifications. Refer to the specifi-

cation table.

(Argentina)

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Summary of Contents for Panoramic TVP-2905AS

Page 1 Panoramic FILE NO. SERVICE MANUAL Colour Television Model No. TVP-2905AS (Argentina) Service Ref. No. TVP-2905AS-00 L-AUDIO-R VIDEO MENU - VOL + JXMRR Specifications Product Code: 111334312 Power Source ..AC220V, 50Hz / 60Hz Receiving System .
Page 2: Table Of Contents
Contents Safety Notice ............... . 2 Chassis Block Diagram .
Page 3: Chassis Block Diagram
Chassis Block Diagrams MAIN SIGNAL PROCESSING CIRCUIT...
Page 4 Chassis Block Diagrams SYSTEM CONTROL...
Page 5: Ic Block Diagrams
IC Block Diagrams IC201 < IF/Video/Chroma/Def. > LA76818A Audio Output SIF Input FM Output/Selected SIF APC Filter Audio Output SIF Output PIF AGC Ext. Audio Input RF AGC Output PIF Input1 APC Filter VCO Coil 1 PIF Input 2 VCO Coil 2 IF Ground VCO Filter IF Vcc...
Page 6 IC Block Diagrams IC201 <IF System Block Diagram> LA76818A...
Page 7 IC Block Diagrams IC002 < Audio AMP. > LA42052-E IC501 < Vertical Output > LA78041N, STV9379AN STANDBY Thermal Protection INPUT AMP. OUTPUT AMP. OUT1 Pump REF AMP. THERMAL POWER PROTECTION CIRCUIT OUT2 INPUT AMP. OUTPUT AMP. POP NOISE PREVENTION RIPPLE FILTER BLOCK BLOCK RIPPLE...
Page 8: Service Adjustments
Service Adjustments General This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments. IC802 (EEPROM) Replacement When IC802 (EEPROM) is replaced, IC801 (CPU) will automatically write the initial reference data into IC802 for basic TV operation. However, the bus data should be checked and some bus data should be set up before attempting the service adjustments.
Page 9 Service Adjustments On-screen Service Menu Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments. When IC802 (EEPROM) is replaced, check the bus data to confirm they are the same as below. The shaded menu should be checked and be set up or readjusted according to the procedures described in the following pages.
Page 10 Service Adjustments Item Initial value Range Description COOP 00~07 Colour Killer Y-APF 00, 01 Y-APF Select DEEM 00, 01 De-emphasis TC V-LVL 00~07 Video Level FMLVL 00~31 FM Level TTEST 00~07 Trap Test IFOM-S 00, 01 Over Mod. SW IFMN-S 00, 01 Audio Monitor SW, Monitor/FM IFTRPS...
Page 11 Service Adjustments Important Notice: Do not attempt to adjust service adjustments not listed on below otherwise it may cause loss of performance and for correct operation. Item 01 [RFAGC] AGC Item 04 [V-SIZ] VERTICAL SIZE NOTE: Do not attempt this adjustment with weak signal. 1.
Page 12 Service Adjustments Items 16-23 GREY SCALE 1. Receive a monochrome circular pattern. 2. Set the brightness and colour to normal, contrast to maximum. 3. Enter to the service mode. 4. Set each value of Item-16 RBIAS, 17 GBIAS, 18 BBIAS mode to 00. Set each value of Item-19 RDRIV, 21 BDRIV mode to 63, 20 GDRIV to 08.
Page 13 Service Adjustments Service Adjustment-2 (MTS Adjustment) Following table shows the initial values of MTS Adjustment which have been stored in the CPU ROM. Item Initial value Range INPUT LEVEL 00~63 HIGH SEPARATION 00~63 LOW SEPARATION 00~63 1. Enter the Service Menu While pressing the MENU button on the televi- sion, press the Number Key 3 on the remote control unit.
Page 14 Service Adjustments SOUND LEVEL ADJUSTMENT 1. Connect a signal to the antenna terminal with audio signal TP-317(pin-38 of IC3401) of 1KHz at 100% modulated. 2. Connect a DC Volt-Meter to TP-317 ( pin-38 of IC3401) and the ground. 3. Switch the TV set on, and set the Surround OFF. Press and hold the MENU button on the TV set, and JP3405 press “3”...
Page 15 Service Adjustments 6. Select “HI SEPARATION” by pressing the CHANNEL UP/DOWN button on the remote control or TV set. INPUT LEVEL HI SEPARATION LOW SEPARATION ADJUST: - /+ CHOOSE: EXIT : MENU Minimum leakage TP-318 (L) 7. Adjust the level of 4KHz at TP-318 (pin-39 of IC3401) to become minimum level by pressing the VOLUME (+/-) button on the remote control or TV set.
Page 16: Protection Circuit
Service Adjustments Service Adjustment-4 FOCUS ADJUSTMENT HIGH VOLTAGE CHECK 1. Receive the monochrome circular pattern. 2. Set the brightness to normal and contrast to maximum. Note: +B (+130V) Voltage and Grayscale Adjustment must 3. Adjust the focus control on the F.B.T. for the best focus be completed before attempting High Voltage Check.
Page 17: Purity And Convergence Adjustment
Purity and Convergence Adjustment CAUTION: The Convergence and Purity adjustments have been made at the factory. Readjustment should be made only after picture tube or deflection yoke replacement, following the steps below: PURITY ADJUSTMENT 8. Tighten the mounting screw of the Deflection Yoke. Adjust 1.
Page 18: Cabinet Parts List
Cabinet Parts List Note: Parts order must contain Service Ref. No., Part No., and descriptions. ANT. 75Ω VIDEO L-AUDIO-R MENU - VOL + JXMRR Key No. Part No. Description Key No. Part No. Description 610 266 7974 BUTTON POWER-F5AD 610 252 8725 SPRING-S-S6KL 610 270 5591 SPRING-HKG-S6KL...
Page 19: Chassis Electrical Parts List
Chassis Electrical Parts List F5AP Product safety should be considered when a component replacement is made in any area of a receiver. Components indicated by a mark in this parts list and the circuit diagram show components whose value have special significance to product safety.
Page 20 F5AP Ref. No. Part No. Description Ref. No. Part No. Description 405 163 1602 TR 2SC2812N-L6-TB0 405 173 9902 TR 2SC3928A1S 405 163 1701 TR 2SC2812N-L7-TB0 Q681 405 011 8401 TR 2SC1740S-Q 405 173 9803 TR 2SC3928A1R 405 011 8500 TR 2SC1740S-R 405 173 9902 TR 2SC3928A1S...
Page 21 F5AP Ref. No. Part No. Description Ref. No. Part No. Description 405 015 8902 TR 2SC2812-L7-TB C210 403 047 5005 ELECT 470U M 405 163 1602 TR 2SC2812N-L6-TB0 C212 403 155 4204 CERAMIC 15P J 405 163 1701 TR 2SC2812N-L7-TB0 C221 403 342 3300 CERAMIC...
Page 22 F5AP Ref. No. Part No. Description Ref. No. Part No. Description 403 276 9706 POLYESTER 0.1U K 100V C851 403 157 3106 CERAMIC 56P J C521 403 054 1502 ELECT 470U M C852 403 157 3106 CERAMIC 56P J C524 403 219 4904 MT-COMPO 0.27U J...
Page 23 F5AP Ref. No. Part No. Description Ref. No. Part No. Description R226 401 105 3406 MT-GLAZE 27K JA 1/16W 402 098 0601 WIRE WOUND 3.9 KA R227 401 105 4205 MT-GLAZE 33K JA 1/16W R611 401 020 0801 CARBON 470 JA 1/4W R228 401 024 7707...
Page 24 F5AP Ref. No. Part No. Description Ref. No. Part No. Description R837 401 105 5301 MT-GLAZE 4.7K JA 1/16W 408 047 8605 ZENER DIODE MTZJ6.8A R838 401 105 5301 MT-GLAZE 4.7K JA 1/16W D103 407 100 0204 ZENER DIODE MTZJ36A R839 401 105 4007 MT-GLAZE...
Page 25 F5AP Ref. No. Part No. Description Ref. No. Part No. Description 408 045 8508 DIODE RU3YX SW601 645 050 4129 SWITCH,PUSH POWER 2P-2T D654 407 106 2806 DIODE RU3YX 652 001 4565 SWITCH,PUSH POWER 2P-2T 408 045 8508 DIODE RU3YX X161 421 009 9403 SAW F TSF5246P...
Page 26 F5AP Ref. No. Part No. Description Ref. No. Part No. Description R715 401 009 1508 CARBON 2.7K JA 1/2W R721 401 105 1907 MT-GLAZE 180 JA 1/16W R723 401 105 2706 MT-GLAZE 220 JA 1/16W R724 401 065 4604 OXIDE-MT 12K JA R725 401 009 1508...
Page 27 Panoramic Nov./’04...
Page 28 8. This circuit diagram covers a basic or representative chassis only. There S: Oxied metalized 12 X 10 =12K SERVICE W: Wire wounding TVP-2905AS-00 may be some components or partial circuit differences between the Rated wattage (1/2W) C: Solid REF. NO. actual chassis and the circuit diagram.
Page 29 Waveforms & Voltages CRT BOARD (Component Location) (On the Main Board) 1AA4B10E6900B IC002 (AUDIO AMP.) Pin-1 7.7V 1.6V 1.6V 5.8V 12.0V 18.2V 7.5V Q701 R741 B-OUT D741 10 GND 7.6V D742 J702 IC201 (IF/VIDEO/CHROMA) Q701-L D754 Q711 Pin-1 2.3V 2.3V 2.7V 1.6V 2.9V...

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