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HITACHI C2576 TN
General Information
Item Part No.
X240533 X240555 X240631 J0800041R N937014 N937015 N937018 J0262774N J0262774N J0262774N JAJ00273R JAJ00273R J0262774N C648751 C135753 0232753 0130753 E822925 J2698351 E846662 E846815 J2956783 E882376 J2917782 J2917782 J2124531 L380105 L380105 J2274361 J2274362 J2917782 R407551 R407551 R407551 R407551 R407551 R407551 R407551 R353714 R658714 R812551 R353714 R162714 R812551 R170727 J2640572 J2640572 J2640572 J2640572 J2633391 J2436626 J2436771 J2436771 L380104 L380103 T159012 T166018 T180002

1
Recommended Safety Parts
Description (Models)
Back Cover 25" Back Cover 29" Back Cover 16:9 Chassis Frames 76's, 77's Chassis Frames 75's Chassis Frames 16:9

Service Mode
A5 SERVICE MODE OPTIONS The SERVICE MODE screen is entered by pressing the `ESO' button underneath the cover on the handset. The T.V. must, however, be in factory mode first. The T.V. can be switched into factory mode by pressing both VOLUME +/buttons on the front of the set whilst it is powering up. SERVICE MODE CODE V1. F E2 V1. F AFC = 0

buttons on the handset. The normal value is 0. GEOMETRY ADJUSTMENT IN SERVICE MODE
Geometry Register Number 00 01 02 03 04 05 06 07 08 Geometry Adjustment Setting Horizontal Shift EastAAlest Width East/West ParabolafiNidth East/West Corner/Parabola EastANest Trapezium Vertical Slope Vertical Amplitude 5 Correction Vertical Shift

A5 Chassis Also Covers C2577TN, C2976TN, C2977TN, C28300.

C101

Specifications
TV Standard ...................................................................................................... 625 lines, .............................................................................................................. STANDARD I (UK) ............................................................................................................ B/G/H, /L', (Export) Channel coverage ........................................................................... UHF Channels (UK) ......................................................................................... UHF/VHF Hyper band (Export) Aerial input impedance ........................................................................................ 75 ohm ......................................................................................................................... unbalanced Programme Selectors ..................... Channel UP/DOWN buttons with 60 programme .............................................. remote control CH direct input. Frequency direct input Power Consumption C2576/77/75 ............................................................................................................. 139 W C2976/77/75 ............................................................................................................. 141 W C28300TN ................................................................................................................ 143 W Picture tubes C2576/77/75 ..................................................................................................... 59 cm type C2976/77/75 ..................................................................................................... 68 cm type C28300TN ........................................................................................................ 66 cm type Mains Voltage ........................................................................................ 220V/240V 50 Hz Fuse ................................................................................................................. T4.0A Type Focusing ...................................................................................................... Electro static

C9000 C9001 C901 C9011 C9012 C902 C903 C9105 C998 C999 E801 E801 E900 E900 F&S LEAD F901A IC901 IC902 L9000 L901 L902 L910 (Deg Coil) L910 (Deg Coil) OP9000 R4505 R4506 R4555 R4556 R4706 R4707 R4811 R9019 R9019 R9100 R917 R926 R942 R999 RL2700 RL2701 RL900 RL950 SW901 T701 T701 T701 T9000 T901 V1 V1 V1

29" 25", 16:9 CL, CP C

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GEOM GEOM GREY GREY A2 A2 BYTE

Reg. Value Reg. Value Level Stereo

00 00 00 00 00 00 00000000

> GREY SCALE (WHITE BALANCE) ADJUSTMENT IN SERVICE MODE
Grey Scale Register Number 00 01 02 03 04 05 Grey Scale Adjustment Setting RED Gain GREEN Gain BLUE Gain RED Level GREEN Level BLUE Level

EXTERNAL 12C
25" 29", 16:9

VERSION INDICATION 1) The Version number of the programme code in the EPROM is displayed after the word "CODE". 2) The Version number of the data in the external EEPROM (E2) is displayed after the word "E2". AFC INDICATION The service engineer can set the AFC coil ([202) without the use of a meter by ensuring that the AFC digit is on the boundary between 2 and 3. The range of the digit is between 0 and 4. A2 ADJUSTMENT 1) The A2 input level can be adjusted to any desired value between 0 and 15 by using the cursor LEFT/RIGHT buttons on the handset. The normal value is 0. 2) The A2 Stereo separation can be adjusted to any desired value between 0 and 63 using the cursor LEFT/RIGHT

76's, 77's 16:9 25", 29" 16:9

NOTE: These adjustments are for the current selected white balance setting in the FEATURE MENU. The user will have to swap between the FEATURE MENU and SERVICE MODE to adjust all 3 white balance settings (COLD, NORM and WARM). SERVICE BYTE DESCRIPTION
Factory Mode ON Auto Tuning ON I Dolby TOP Text Enable Single Standard Enable NOT USED Comb Filter Enable

Standard Disable VHF OFF

29" 25" 16:9

25" 16:9 29"

NOTE 1: The user can NOT alter the FACTORY MODE or AUTO TUNE flags using the left/right cursor buttons on the handset when in SERVICE MODE.

Main A5 Menu Tree

A5 Sub-Menu Tree

Service Mode Menu Tree

Fig. 1

Fig. 2

Fig. 3

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN
Service Mode Cont'd
NOTE 2: The Factory Mode flag is set to `1' when the T.V. is in Factory Mode. Factory mode can be entered by pressing both VOLUME +/- buttons on the front of the set whilst it is being powered up. NOTE 3: Auto Tune can be enabled so when the TV. is switched on, it will start tuning in the TV. (after the user has gone through the INSTALLATION MENU). This flag is enabled when the user presses the STANDBY button or switches the set off when the AUTOMATIC TUNING screen is displayed. NOTE 4: The I Standard VHF disable flag informs the TV. whether or not it should begin tuning at 441.10 MHz or 41.10 MHz. If this is set then tuning will begin at 41.10 MHz. If this is `0' and the single standard flag is `1', then tuning will begin at 441.10 MHz instead. NOTE 5: For the A5 75 Model Range of T.V's, this flag will be set to indicate to the software that no Dolby board is present. NOTE 6: For sets that should have TOP TEXT available, the TOP TEXT ENABLE flag should be set to `1'. NOTE 7: For a single standard chassis (CP****TA, CP****TAN, and C****TN) this flag should be set to `1'. NOTE 8: For AS 25" and 28" models, the COMB FILTER will not be fitted and as such this flag should be cleared to `0'. The GEOMETRY, GREY SCALE, A2, and SERVICE BYTE values can be stored by pressing the MENU button whilst the SERVICE MODE screen is displayed. If the user makes any mistake, the T.V. ( ) button can be pressed to clear the screen. The "ESC" button can then be pressed to reenter SERVICE MODE again. A5 CHASSIS ALIGNMENT PROCEDURE 1. APPLICATIONS 2. P. W.B. ASSEMBLY ADJUSTMENT VR202 Alignment (CL**76/77TAN only) 2.1 FOR SIGNAL 2.1.1 PREPARATION ADJUSTMENT 2.1.2 AGC ADJUSTMENT 2.1.3 AFC ADJUSTMENT 2.2 FOR POWER AND DEFLECTION 2.2.1 +B VOLTAGE ADJUSTMENT 2.2.2 POWER GOOD LINE 2.2.3 AUDIO FEEDBACK TRIM 2.2.4 HIGH VOLTAGE LIMITER CIRCUIT CHECK 2.2.5 ANODE/FOCUS SHORT-CIRCUIT TEST PROTECTION CIRCUIT 2.2.6 SUB PSU +9.5 V VOLTAGE SET 2.2.7 BASIC TEST SPECIFICATION 2.2.8 PRIMARY CURRENT LIMIT (C28300 ONLY) 3. FINAL ALIGNMENT (BY SOFTWARE ADJUSTMENT) 3.1 PICTURE POSITION/SHAPE 3.1.1 HORTZONTAL VERTICAL CENTRE VERTICAL AMPLITUDE TILT PARABOLA WIDTH 1) Apply L standard RF signal. 2) Select L standard on CTV controls (system L VHF band 1). 3) Enter frequency on CTV controls. 4) Connect oscilloscope and voltmeter to pin 23 IC201. 5) Adjust VR202 until a fast rate of change is seen on the oscilloscope. 6) Adjust VR202 so that the voltmeter reads 2.5V 0.2V. 2.2 POWER AND DEFLECTION ADJUSTMENT 2.2.1 +B VOLTAGE ADJUSTMENT R718 R749 R719 3.2 FOCUS ADJUSTMENT 3.3 SCREEN CONTROL/CUT OFF ADJUSTMENT 3.4 WHITE BALANCE ADJUSTMENT 4. PIN P ADJUSTMENT 5. ADJUSTMENT POINTS 6. SERVICE BYTE ASSIGNMENT INFORMATION 1. APPLICATIONS THIS SPEC. SHOULD BE APPLED TO C2576/ 77TN AND C2876/77TN (28300) 2. RW.B ASSEMBLY ADJUSTMENT 2.1 FOR SIGNAL 2.1.1 PREPARATION ADJUSTMENT 1) +B adj. VR950 .... Centre 2) Screen VR (FBT) .... Counter-clockwise fully 3) Turn on set. Adjust +B to approximately 150V. (Pre adjustment only - full adjustment in section 2.2.1) 2.1.2 AGC ALIGNMENT 1) With the signal received, apply heat run for more than two minutes to avoid the influence of circuit temperature drift. 2) Connect a voltmeter of at least 100K internal resistance to the A.G.C. terminal of the tuner. 3) Receive the channel below. 4) Adjust A.G.C. potentiometer VR201 until the following voltage is obtained. 2.1.3 AFC ALIGNMENT 2.2.3 AUDIO FEEDBACK TRIM (For sound on vision) Model C2577 C2576 C2877 C2876 C28300TN +B Voltage (V) 150 0.2V 150 0.2V

2
2) Measure +9.5V output. If output is greater than 9.8V then cut R9107 (220K 1/4W). 3) Re-check +9.5V output: output must be +9.5V 0.3V. 2.2.7.SUB POWER SUPPLY TEST
Test for: TEST SPECIFICATION +9.5V 1) Load regulation +9.5V + 0.3V - 0.7V 2) Voltage regulation +9.5V + 0. 3V - 0.7V 3) Ripple voltage (at 200V VAC IN) 4) Short circuit +9.5V and +26V 5) Standby (all rails should be at 0V 6) Remote on/off operation Hi/Low Hi/Low 0V 0V No Failure No Failure 300mV 400mV +26V+4V-1.5V +26V +26V+4V-1.5V

appropriate controls. 7) Adjust control so that the centre of the picture is as in the diagram below.

3.4 WHITE BALANCE ADJUSTMENT (After cut off set correctly) 1) Set white balance to `Norm' in picture (enhanced features menu). Contrast - Minimum Brightness - Mid. Point (fine adjust using colour analyser) Colour - Mid point 2) Adjust red and blue level registers of TDA4780 to get correct low light according to colour temperature required (9300K or 7400K). See tables below.

6) Short circuit test (all rails). PSU should go into standby/reset/lockup. (Supply may have to be removed to restart) 7) Standby check. +B should go to 120V < +B >140V. 8, +5, +12V should be 0V. 2.2.2 POWER GOOD LINE 1) Set picture to same conditions as above. 2) Measure pin 1 PL9S1. Should be HI, if LOW then cut R945 (if fitted). If HI but no power down timing (see below) then cut R991. 3) Check power down logic timing (>5mS).

3.1.2 TILT, PARABOLA, WIDTH. 1) Allow 5 minutes warm up time before adjustment. 2) Receive Philips circle pattern. 3) Set brightness and contrast to nominal. 4) The set should face North or South. 5) AC input should be 230V 5V 50Hz. 6) Adjust software in service mode using handset so that the vertical lines at the outside edges of the screen are adjusted to be roughly vertical. 7) Adjust the software in service mode using handset so that the (approximately) vertical lines at the sides of the screen are adjusted as vertical as the centre of the screen. 8) Adjust the software in service mode using handset so that the castillations at the sides of the picture are not quite visible. Reduce the brightness and contrast to make sure that the picture width has not reduced so that you can see beyond the castellations. You may have to repeat stages 6 and 7 again. 3.2 FOCUS ADJUSTMENT 1) Receive the Philips circle pattern. 2) Adjust after horizontal/vertical has been adjusted. 3) Switch the received signal to the cross hatch signal.

7400K `Norm' X - 304. y - 320 Colour Temp. Cool - 9300K Norm 7400K Warm - 6500K Colour Temp. Cool - 9300K Norm 7400K Warm - 6500K Red Gain 36 40 43 Red Level P-9 P P+7 Green Gain 30 30 30 Green Level 20 20 20 Blue Gain 26 18 16 Blue Level Q +12 Q Q3

If sound on vision is seen with maximum bass 1/ 2 volume on normal Picture - STEREO Sound then cut trim resistor R969A (to change R969 value to 22K) 2.2.4 HIGH VOLTAGE LIMITER CIRCUIT CHECK 1) Mount the PW board to the set and adjust normally. 2) Receive the circle pattern signal. 3) Set the contrast and brightness to maximum. 4) Add R=470K in parallel with R718 and R749. 5) Check that picture and sound disappear when R is added. NOTE: High voltage limiter circuit jig:

TEST LOAD + 9.5V Max Min 200mA 50mA + 26V 2A 0.1A

P and Q adjusted for correct reading on colour analyser in Norm mode. For Warm and Cool modes use offsets in table but do not adjust for exact colour temperatures. C28300 9300K 9300K `Norm' X - 284. y -299
Colour Temp. Cool - 10000K Norm 9300K Warm - 7400K Colour Temp. Cool - 10000K Norm 9300K Warm - 7400K Red Gain 32 36 40 Red Level P-7 P P+7 Green Gain 30 30 30 Green Level 20 20 20 Blue Gain 20 26 18 Blue Level Q +5 Q Q -12

2.2.8.C28300 POWER SUPPLY SETTING (MAIN BOARD) 1) Connect DVM to +B line. 2) Adjust ac. mains input to 190V a.c. 3) Adjust VR923 and VR950 to mid-point positions. 4) Turn TV on and adjust VR950 until +B is as per table below. 5) Switch TV into standby. 6) Connect load A across C955 and load B across C967. 7) If set trips out with loads A and B then go to step 8, if not, then adjust VR923 clockwise until TV shuts down. 8) Disconnect a.c. mains input and loads A and B. 9) Connect load C across C955 and load D across C967. 10) Connect a.c. mains input. 11) If P.S.U. remains operative when switched on with loads C and D connected then alignment is correct. 12) If P.S.U. shuts down then alignment is incorrect. (Adjustment complete). 13) Disconnect a.c. mains input and loads C and D. Adjust VR923 to mid. point position and proceed from step 5. MODEL C28300 +B 149.8 150.2V

L202 ALIGNMENT 1) apply relevant RF signal. Circle Pattern 2) on dual/multistandard receivers select BG standard. 3) Enter frequency on CTV controls to ensure AFC loop is off. 4) Connect oscilloscope and voltmeter to pin 23 IC201 (TDA9815) or pin 13 (TDA9800). 5) Adjust L202 until fast rate of change is seen on the oscilloscope. 6) Adjust L202 so that the voltmeter reads 2.5V 0.2V.

P and Q adjusted for correct reading on colour analyser in Norm mode. For Warm and Cool modes use offsets in table but do not adjust for exact colour temperatures. 4. PinP ADJUSTMENT 1) Receive grey scale pattern (more than 8 steps). 2) Connect oscilloscope to CRT green cathode. 3) Turn on PinP using handset and move to bright side of screen. 4) Adjust PinP contrast as follows. Contrast values stores in E2 and will, indirectly, adjust PinP contrast. PC software may become available later.

4) Turn the focus VR gradually clockwise from the full counter clockwise position so that the focus of the vertical line in the centre part, furthest to the right is adjusted for best result (contrast - maximum, brightness - normal). 3.3 CUT-OFF ADJUSTMENT 1) Rough adjustment. (1.1) Set to video mode with no signal. (1.2) Turn screen pot of FBT until flyback lines disappear. 2) Fine adjustment (2.1) Set contrast to mm, brightness to mid, colour to mid. (2.2) Receive cross hatch pattern. (2.3) Connect probe to CRT green cathode. (2.4) Adjust screen pot until black level is 170V (29") 160V (25").

25" 229K 47K 3K3

29" 240K 4K7 56K

To comparison circuit 10953 (Protection) 1) AC input voltage = 230V + SV/5Hz. 2) Turn +B voltage VR (VR950) to mid-point (if pre-adjustment not done). 3) Receive Philips circuit pattern. Switch on chassis and set the brightness and contrast to maximum. 4) After applying heat run for 30 sec. or more, turn VR950 gradually and adjust +B (re-check after 2 minutes heat run). Measuring point: +B voltage C955 + side gnd C955 - side 5) Set the value of +B voltage to the value shown in the following table. 2.2.5 ANODE/FOCUS SHORT-CIRCUIT TEST PROTECTION CIRCUIT CHECK 1) Receive the circle pattern signal. 2) Set the contrast/brightness to maximum. 3) Check trip point by adding an external D.C. supply across R730. The set should not trip when a 0.8V supply is added. The set should trip when a 1 .2V supply is added. 2.2.6.SUB POWER SUPPLY ADJUSTMENT 1) Switch on power supply (mains input 230V 5V 50Hz).

LOAD A: +B LOAD = 180R 123W (149V) LOAD B: AUDIO LOAD = 10R 62W LOAD C: +B LOAD = 200R 111W (149V) LOAD D: AUDIO LOAD = 11.4 54.8W 3.1 PICTURE POSITION/SHAPE 3.1.1 HORIZONTAL PHASE, VERTICAL CENTRE, VERTICAL AMPLITUDE 1) Wait 5 minutes minimum after switching on the mains before adjustment. 2) Receive the Philips circle pattern. 3) Set brightness and contrast to maximum. 4) The set should face North or South. 5) AC input should be 230V SV 50Hz. 6) Adjust software control in service mode using

3.1.2

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN
Voltage Tables
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 IC001 VOLTAGE 4.3V (Power good) 0V (AVI switch) 4.7V (R/C input) 0V (AV2 switch) Use scope shift clock Use scope shift clock N/C 0V Mute Use scope shift enable 5V D.EN. 0V Customer mode (5V Service mode) 4.7V Out of ST.BY (0V in stand by) 1.7V OSC.OUT 0V VSS 0V Vss Use scope OSC Out N/C 5V Reset 5V A8 5V A9 5VA10 0V N/C 5V A11 0V A12 0V A13 5V A14 0V A15 Use scope D0/A0 PIN 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 VOLTAGE Use scope D1/A1 Use scope D2/A2 Use scopeD3/A3 Use scope D4/A4 Use scope D5/A5 Use scope D6/A6 Use scope D7/A7 GND GND GND 5V P/D 4.7V SDA 4.7V SCL 5V VDD 5V VDD Use scope A5 Use scope D5 Use scope R\W Use scope SDI OV LED DIM (Norm 5V LED Bright stand by) N\C N\C 4.6V Mode switch position A V VOL 5V VOL + 5V PROG SV PROG + 5V SVHS switch (OV when SVHS plug inserted) IC101 VOLTAGE Input 21.8V GND 0V Output 12V IC601 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 IC902 PIN 1 2 3 4 S 6 IC901 PIN 1 2 3 4 S 6 IC9101 PIN 1 2 3 4 5 6

3
IC201 PIN 1 2 3 4 S 6 7 8 9 10 11 12 13 14 15 16 IC301 PIN 1 2 3 4 5 6 7 8 9 10 IC501 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 IC502 PIN 1 2 3 4 S 6 7 8 IC503 PIN 1 2 3 4 S 6 7 8 9 IC505 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 IC953 PIN 1 2 3 4 S 6 7 VOLTAGE 3.3V (VIF) 3.3V (VIF) 0.7V (CBL/MAC) 0.2V (VIF Export) 0.2V (VIF Export) 1.4V (TADJ-AGC) 2.7V (TPLL) 2.8V (CSAGC) 3.SV (STD) 2.4V (CVBS) 3.6V (FWLSWI) 2.4V (V0AF1) 2.4V (V0AE2) 2.3V (CAF1) 2.3V (CAE2) 1.9V(ViFM2) PIN 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 VOLTAGE 2.7V (ViFM1) 0V (ViFM3) 8.4V (TAGC) 2.0V (V0Qss) 2.0V (V0VID) 2.0V (V1VID) 2V (AFC) 2.7V (VC01) 2.7V (VC02) 2.4V (CVP/2) 0V (GND) 2.8V (CVAGC) 4.8V (VP) 4.9V (INSWI) 3.3V (VISIF) 3.3V(VISIF) 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 2.7V (OPR) N/C N/C 2.4V (VROA) 2.7V (VssDAC) N/C N/C 2.7V (OPL) 2.7V (EML) N/C 2.7V (PORM) 2.7V(PORA) 2.7V (REMVE) 2.7V (REMO) N/C 2.7V (S0FF) 2.7V (VssEl) N/C 2.7V(VddEl) 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 S2 2.4V (IREF) 2.4V (VRCF) 2.4V(VddF2) 0V (VssF2) N/C 4.3V (CLKLPF) 4.3V(XTAL) 2.5V (OSC) DV (VssX) 5Vpp Pulses (Data in) 0V (VssD) N/C 4.8V (VddD) 4.3V (Reset) 5Vpp Pulses (Data out) 4.7V (SCL) 4.7V (SDA) N/C N/C

VOLTAGE 2.3V (V. Drive) 2.2V (V. Drive) 8.9V 18V (+18V Supply) 8.8V N/C 0V(GND) 49.7V (V. Output supply) 9.3V (V. Output) 2.4V(V.Pulse) 6.3V (E.W. Output) 0.7V (EW. Input) 0V(GND)

VOLTAGE 12.6V li.4V N/C --8.2V --8.iV N/C

VOLTAGE 4.3V (Comb Luma in) 4.7V(SDA) S.2V (Comb Chroma in) 4.7V (SCL) 3.9V (V2/Y2 in) 5.3V (C2 in) 0V (GND) 3.9V (V3/Y3 in) 10.4V(Vcc) 5.2V (C3 in)

PIN 11 12 13 14 15 16 17 18 19 20

VOLTAGE 3.9V (V1 in) 3.1V(N/C) 5.8V (C out) 3.9V (CBS/Y out) 3.8V (N/C) 3V (CVBS/Y Pinp out) 3.8V (CVBS Comb out) 3.8V (C Pinp out) 0V(Vss) 4.3V (RE Video in)

IC4300 PIN VOLTAGE 1 4V (OP. Amp.1 O/P) 2 4V (OP. Amp.1 I/P) 3 4V (OP. Amp.1 l/P) 4 0V (GND) IC4400 PIN VOLTAGE 1 N/C 2 0.2V (P1) 3 3.9V (Main left in) 4 7.9V (Ref. V) 5 3.9V (Main right in) 6 7.9V (Vcc) 7 3.9V (R. Scart out) 8 0V (GND) 9 3.9V (R. out) 10 3.9V (R. in) 11 0V (R. Bass) 12 3.9V (R. Bass) 13 3.9V (R. Headphone O/P) 14 3.9V (R. Treble) 15 2.3V (R. O/P to Amp.) 16 4.7V(SCL) IC4600 PIN VOLTAGE 1 4.5V 2 4.5V 3 4.4V 4 4.4V 5 4.4V 6 4.4V 7 4.4V 8 4.4V 9 4.4V (L. in) 10 4.4V (R. in) 11 DV (GRD) 12 4.4V 13 4.4V 14 4.4V 15 4.4V 16 5.1V 17 4.4V 18 5.1V 19 4.4V 20 4.4V 21 4.3V IC4601 PIN VOLTAGE 1 DV (D. GND) 2 5V(CLK) 3 0V (Data) 4 5V (Enable) 5 2.4V 6 7.5V 7 8.9V (Supply) 8 4.4V (L. in) 9 4.4V (R. in) 10 4.4V 11 4.4V 12 4.4V IC4603 PIN VOLTAGE 1 3.8V(S. In) 2 N/C 3 3.8V (C. E+R Mix) 4 7.5V (Ref. V) S 3.8V (S. In) 6 7.6V (Vcc) 7 N/C 8 0V(GND) 9 3.8V 10 3.8V 11 3.8V 12 3.8V 13 3.8V 14 3.8V 15 3.8V (S. Out) 16 2.4V(SCL)

PIN S 6 7 8

VOLTAGE 4V (OP. Amp.2 l/P+) 4V (OP. Amp.2 l/P--) 4V (OP. Amp.2 O/P) 8.1V (Supply)

Pins marked as "use scope" are digital pulses between OV and 5V giving irratic readings using a multi-meter or digital multi-meter.

IC002 PIN VOLTAGE 1 5V (Vcc) 2 4.7V (P/D) 3 1.4V (A9) 4 3.3V (A8) 5 1.9V (A4) 6 2.1 V (AS) 7 1.7V(A6) 8 1 .6V (A7) 9 1.8V (A0) 10 1.7V (A1) 11 1.8V (A2) 12 1.7V (A3) 13 2.SV (D3) 14 2.6V (D2) 15 2.4V (D1) 16 OV (GND)

PIN 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

VOLTAGE 2.7V (D0) l.9V (D7) 1.7V (D6) 2.SV (D5) 1.7V (D4) 0V (CE) 0V (A15) 2.2V (OE) 0V (A14) 4.4V (A13) 4.7V (A12) 3.0V (A11) 1.4V (A10) 5.0V (Vcc) 5.0V (Vcc) 5.0V (Vcc)

IC005 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 IC006 PIN 1 2 3 4 5 6 7 8 IC007 PIN 1 2 3 4 S 6 7 8 9 10 11 12 13 14 15 16 IC401 PIN 1 2 3 4 S 6 7 8 9 10 11 12 13 14 15 16

VOLTAGE 4.7V SCL in 4.7V SCL out (set out of standby 0V set in standby) 4.6V SDA out (set out of standby 0V set in standby) 4.6V SDA in 4.8V Switch control supplied from +8V rail 0V Customer mode (5.0V service mode) 0V GND 4.6V SDA in 0V Customer mode (4.6V SDA out to Scart 1 service mode) 0V Customer mode (4.7V SCL out to Scart 1 service mode) 4.7VSCLin 0V Customer mode (5.0V service mode) 4.8V Switch control supplied from +8V rail 7.4V Set out of standby (4.7V set in standby)

VOLTAGE 137.2V 137.0V N/C - 8.2V 0.6V N/C

VOLTAGE 7.3V 6.2V N/C

N/C

VOLTAGE 2.5V (Y out) 2.2V (R-Y out) 2.1V (B-Y out) 4.7V (SCL) 4.7V (SDA) 0.7V (Sandcastle) 7.8V (Vcc) SV (Decoup) 0V(DIG.GND) 0.4V (N/C) 3.8V (Vert/Sawtooth) 3.9V (IRE) 0V (Analogue GND) 2V (EHT Track) 2.3V (V.Drive A) 2.4V (V.Drive B)

PIN 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

VOLTAGE 0.8V (E/W Drive) 3.1V (H.Drive) 0.6V (HElyback) 3.3V (Pinp output) 3.9V (H.PLL Filter) 0V (SVHS C in) 3.8V (SNVHS Y in) 2.6V (CVBS2 in) 2.4V (N/C) 3.8V (CVBSl in) 0V (Analogue GND) 3.4V (Filter REF) 4.6V (Copper PLL Filter) 2.2V (REF XTAL) 1.5V (2nd XTAL) 0.1V (Secam Decoup.)

PIN 17 18 19 20 21 22 23 24 2S 26 27 28 29 30 31 32

VOLTAGE 4.7V (SDA) 3.9V (L. O/P to Amp.) 3.9V (L. Treble) 3.9V (L. Headphone O/P) 3.9V (L. Bass) 3.9V (L. Bass) 3.9V (L. in) 3.9V (L. out) 0V (GND) 3.9V (L. Scart out) 3.9V (Pseudo stereo) N/C 3.9V (Pseudo stereo) N/C 0.7V (P2) N/C

IC950 VOLTAGE Input 12.SV GND 0V Output 5V IC951 VOLTAGE Input 10.9V GND 0V Output 8.1V IC952 VOLTAGE Input 7.7V GND 0V Output 5V IC954 VOLTAGE Input 12.SV GND 0V Output 2.5V IC4410 PIN 1 2 3 4 5 6 7 8 IC4550 PIN 1 2 3 4 5 6 7 8 9 10 11 IC4500 PIN 1 2 3 4 5 6 7 8 9 10 11 IC4700 PIN 1 in) 2 B) 3 4 B) 5 in) 6 7 8 out) 9 10 out) 11 IC4800 PIN 1 2 3 4 5 VOLTAGE 1.6V 1.7V 15.3V 1.7V 1.6V DV DV 13.8V 28.4V 13.8V 28.4V

Voltages taken using a D.M.M. Data (D) and address (A) lines being digital pulse between OV and +5V. IC003 PIN VOLTAGE 1 OV (OE) 2 1.8V (A0) 3 2.6V (D0) 4 2.4V (D1) S 1.8V (A1) 6 1.9V (A2) 7 2.5V (D2) 8 2.SV (D3) 9 1.8V (A3) 10 0V (GND) IC004 PIN VOLTAGE 1 1.8V 2 0.1V 3 2.7V 4 2.3V 5 1.9V 6 0.1V 7 0V

PIN 11 12 13 14 15 16 17 18 19 20

VOLTAGE 1.0V (LE) 1.6V (A7) 1.8V (D6) 1.8V (D7) 1.7V (A6) 2.1V (AS) 2.5V (DS) 1.7V (D4) 2.0V (A4) 5.0VC (Vcc)

VOLTAGE 0V(GND) 0V(GND) 0V(GND) 0V(GND) 4.7V(SDA) 4.7V(SCL) 0V(GND) SV (Vcc)

VOLTAGE 5.7V (Vcc) OV(NC) DV (GND) 0V(GND) 0.7V (Sandcastle) DV (N/C) 3.2V (N/C) 0V(GND)

PIN 9 10 11 12 13 14 15 16

VOLTAGE 5.7V (Vcc) 0V(GND) 3V (R-Y out) 3V(B-Yout) 0V (N/C) 1 .5V (B-Y in) DV (N/C) 1.5V(R-Yin)

PIN 8 9 10 11 12 13 14

VOLTAGE 5.0V 5.0V 0V 5.0V 5.0V 0V 5.0V

VOLTAGE SVTV/SVAV1/0VAV2/0VAV3(A.SEL2) 5V (Pos/Neg) 5V (L/L) 5V (0V RGB) 0V N/C 0V (Compress) 0V(GND) N/C 4.3V (Power good) SV(SC) 0V(SE) 0V(DS 0V(SD) SV TV/ 0V AV1 / 5V AV2 / 0V AV3 (ASEL1) SV(Vcc)

VOLTAGE 7.5V (Vcc) 2.1V 2.5V (R-Y in) 2V(R-Yout) 7.5V(Vcc) 1.9V (B-Y out) 2.5V (B-Y in) DV (GND) 4.7V(SDA)

PIN 10 11 12 13 14 15 16 17 18

VOLTAGE 4.7V (SCL) 2.SV 4.7V (Y out) 2.5V 2.5V 3.2V 3.1V (Yin) 0.7V (Sandcastle) 0V(GND)

PIN 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

VOLTAGE 2.8V 2.7V 2.7V 5.2V 4.4V 5.1V 4.4V 4.4V 4.4V 4.4V 4.4V 4.4V 4.4V (C. out) 4.4V (S. out) 4.4V (R. out) 4.4V (L. out) 8.8V (Vcc) 0.1V 5V (Enable) 0V (Data) 5V (CLK)

VOLTAGE 3.6V (Left output) 8V (Vcc) 3.6V (Right output) 0V(GND) 0.6V (R. I/P--) DV (R. I/P+) 0V (L. l/P+) 0.6V (L. l/P--)

VOLTAGE 1 .7V (Left surround 1 .7V (L. surround F/ 14.3V (Mute) 1 .7V (R. surround F/ 1 .7V (Right surround 0V(GND) 0V(GND) 12.8V (R. surround 26.2V (Supply) 12.8V (L. surround 0V(GND)

VOLTAGE 3.8V(RFL) 3.0V(AVl.L) 3.8V (Audio out L.) 2.9V(AV3.L) 3.1V(AV2.L) 0V(GND) 0V(GND) 0V(GND) 0V TV/ 8V (AV1) 0V (AV2) 8V (AV3) 0VTV/ DV (AV1) 8V (AV2) 8V (AV3) 2.9V(AV3.R) 3.9V(RF.R) 3.9V (Audio out R.) 3V(AV2.R) 3V(AV1.R) 8V(Vdd)

VOLTAGE 1.7V(R. l/P) 1.7V (RE/B) 15.2V (Mute) 1.7V(L. F/B) 1 .7V (L. l/P) 0V(GND) 0V(GND) 13.8V(L.O/P) 27.9V (Supply) 3.9V(R.O/P) N/C

VOLTAGE 0V (ESW) 5V (R2 in) 5V(G2 in) 5V (B2 in) 8V(Vp) 4V (B-Y in) 4V (R-Y in) 3.9V(Y in) 0V (GND) 5V (R1 in) 5V (G1 in) 5V (B1 in) 0.2V (ESW) 0.7V (Sandcastle)

PIN 15 16 17 18 19 15 16 17 28 28 28 28 28 28

VOLTAGE 5V (BCL) 5V (CPDL) 5.1V(CL) 2.2V (W1) 5.7V (C1) 2.9V (B out) 3.3V (CB) 3.2V(G out) 3.5V (CG) 3.SV (R out) 3.4V (CR) 2.SV (VM Drive) 4.7V (SDA) 4.7V (SCL)

PIN 13 14 15 16 17 18 19 20 21 22 23 24

VOLTAGE 4.4V (Surround out) 4.4V 4.4V (Front R. out) 4.4V (Front L. out) 0V(A.GND) 4.4W 4.4V 4.4V 4.4V 4.8V 2.3V(XTAL) 2.2V(XTAL)

VOLTAGE 11.4V (PG O/P) 18.4V (Comp.l O/P) 18.SV (Vcc) 8.1V (Comp.l l/P--) 9.1V(Comp.i I/P+) 2.5V (Comp. 2 I/P--) 2.7V (Comp.2 l/P+)

PIN 8 9 10 11 12 13 14

VOLTAGE 2.5V (Comp.3 l/P--) 2.2V (Comp.3 I/P+) 2.8V (Comp.4 l/P--) 2.5V (Comp.4 l/P+) 0V(GND) 0.1V (Comp.4 O/P) 0.1V (Comp.3 O/P)

VOLTAGE 12.4V (Centre in) 12.5V (--VE I/P) 0.1V(GND) 12.5V (Centre out) 26.2V (Supply)

IC4201 PIN VOLTAGE 1 N/C 2 N/C 3 4.8V (VddA) 4 0V (VssA) 5 2.4V (VRCA) 6 N/C 7 2.4V (EMR)

PIN 27 28 29 30 31 32 33

VOLTAGE 2.5V (VCONT) 2.4V (MIXREF) 2.4V (DaPSK) 2.5V (COFF) N/C 1.7V(PUDET) 2.4V (VROE)

PIN 17 18 19 20 21 22 23 24 2S 26 27 28 29 3D 31 32

VOLTAGE 2.4V(SDA) 3.8V (C. Out) 3.8V 3.8V 3.8V 3.8V 3.8V 3.8V 7.6V 3.8V 3.8V 3.8V (C. In) 3.8V 3.8V(S. In) 0V N/C

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN
Voltage Tables Cont'd
In Control Out B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E B C E Q001 5V 0V 5V Q201 3.8V 12.1V 3V Q301 3.6V 7.3V 2.9V Q402 4.9V 0V 0V Q410 3.5V 2.9V 7.9V Q501 3.3V 7.3V 2.7V Q701 -1V 33.3V 0V Q810 11.7V 12.5V 11.0V Q851 0.7V 0.5V 6.5V Q860 D.4V DV 1V Q901 --3.2V --4.6V --8.1V Q950 27.2V 12.7V 12.6V Q4201 2.2V 4.4V 1.6V Q4300 0.7V 0V 0V Q4400 4V 8V 3.3V Q4501 0.1V 15.3V 0V Q4450 4V 8.2V 3.3V Q4600 4.4V 3.7V 9V Q4700 0V 0V 14.3V Q5000 3.8V 3.1V 7.9V QOD2 Q003 DV 5V 2.2V -1 .9V DV 5V Q202 Q203 DV 2.3V DV 1.6V DV 4.9V Q302 Q3D3 3.9V 4.9V 7.4V 4.9V 3.2V 0V Q403 Q405 4.9V 4.4V 0V 12V 0V 3.8V Q411 Q412 3.7V 3.7V 3.1V 3V 7.9V 7.9V Q502 Q510 7.3V 12.3V 5.1V DV 7.9V 12.2V Q705 Q751 3.iV 0.5V 8.2V 164.5V 2.8V 0.6V Q811 Q812 8V 7.9V 7.3V 7.2V 9.9V 0.1V Q852 Q856 0.1V 3.6V S.8V 7.SV 11V 4.3V Q861 Q862 0.4V 2.1V DV 3.2V 1V 1.4V Q902 Q903 0.6V --4.2V --3.2V 398V 0V 0V Q961 Q952 27.9V 0.7V 28.7V 0V 28.7V 0V Q4202 2.3V 4.6V 1.6V Q4301 0V Woofer sat at mid. 0V 0V Q4401 4V 8V 3.3V Q101 Dependent on agc 0V Dependent on agc

4

Text Diagram

Q304 3.7V 7.9V 3V Q4D6 4.6V 12V 3.9V

Q305 0V 0V 0.7V Q407 3.7V 3.1V 7.9V

Q306 2.6V 7.6V 1.9V Q4D8 3.7V 3.iV 7.9V

Q307 7.3V S.6V 7.9V Q409 3.6V 2.9V 7.9V

Q813 7.6V 6.8V 9.9V Q857 3.7V 7.SV 4.3V Q863 3.7V 0V 4.3V Q904 --8V --4.6V --8.1V Q954 6.8V 138.1V 6.2V

Q859 0.4V 0V 1V

Q953 0.7V 0V 0V

Q955 3.2V 3.2V 0V

Q959 0.2V 37.2V 0V

Q960 G 37.2V D 28.5V S 28.5V

Q4451 4V 8.2V 3.3V Q4601 4.4V 3.7V 9V Q4800 0V 0V 12.5V

Q46D4 4.4V 3.7V 9V Q4801 0.7V 0V 0V

Q4605 4.4V 3.7V 9V

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN
16:9 Deflection PCB Diagram

5
Compression Circuit Diagram

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

6
RGB Processing Diagram

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

7
Dolby Audio Diagram 1

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

8
Dolby Audio Diagram 2

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

9
PIP Circuit Diagram 1

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

10
PIP Circuit Diagram 2

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

11
Power & Deflection Diagram 1

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

12
Power & Deflection Diagram 2 (C28300)

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

13
Signal Processing Diagram (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381)

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

14
Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)

HITACHI C2576 TN

15
Signal Processing Diagram (C28300)

Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont'd / Text Diagram / Voltage Tables / Voltage Tables Cont'd / 16:9 Deflection PCB Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300) Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)