Author: Samuel M. Goldwasser
Corrections/suggestions: [Feedback Form]
sam@stdavids.picker.com
Copyright (c) 1994, 1995, 1996
All Rights Reserved
Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied:
This document provides pinouts for some of the common integrated circuits found in audio and video entertainment equipment like TVs, VCRs, and cassette decks and computer monitors. A good source for this information is the ECG Semiconductor Master Replacement Guide (or the SK/NTE or other similar databooks).
NOTE: the companion document: "VCR Power Supply Hybrid Regulators" contains similar information for many of the common parts found in VCRs with linear power supplies.
The following are valid reasons for investigating the health of one of these parts:
First identify a suitable ground for your multimeter. With the equipment unplugged, test for continuity between the ground pin of the chip or hybrid and the chassis or a metal shield. Don't use the part's ground pin as clipping anything to it increases the chance of an unfortunate short circuit.
First, check for power to the Vcc or Vss (or whatever) pins. A large percentage of failures will be due to lack of power or incorrect voltages. The suspect device may or may not be at fault. In many cases, a fusable resistor has sacrificed itself possibly due to a short in the suspect part or elsewhere (or opened for no good reason).
However, note that the 'typical Vcc' or other supply voltages listed in this document or the device's datasheet may not be what your equipment actually uses. Therefore, a voltage that is moderately different than the one listed for the device may be normal.
Once good power is confirmed, test the inputs and outputs. Obviously, an oscilloscope is generally needed for these.
Where multiple identical devices are present, substitution is usually an acceptable troubleshooting technique but there is some risk involved as faulty circuitry can blow your 'good' part.
This list was compiled from replies to postings on sci.electronics.repair and will be updated as new requests come in. Contributions are welcome. Please email in a format similar to those listed below. If you provide additional comments, your name and email address will be listed as well.
VCR Motor Driver with braking. Vcc max = 18 V, I max = 1.2 A.
Pin 1: GND Pin 2: Vout 1 Pin 3: Vz1 Pin 4: Vreg Pin 5: Fin Pin 6: Rin Pin 7: Vcc1 Pin 8: Vcc2 Pin 9: Vz2 Pin 10: Vout 2
I would guess that you should be able to monitor Fin and Rin (forward and reverse, I would assume) and determine if the commands are correct. Vout 1 and 2 should probably be opposites of each other for forward (e.g., +,0) and reverse (e.g., 0,+). They would be the same for stop.
I have no idea what the Vzs are or the Vreg.
Dual op-amp.
Pin 1: Out 1 Pin 2: -In 1 Pin 3: +In 1 Pin 4: -Vcc Pin 5: +In 2 Pin 6: -In 2 Pin 7: Out 2 Pin 8: +Vcc
High voltage display driver for gas filled tubes.
Pin 1: Current Prog. In Pin 2: A in Pin 3: B in Pin 4: C in Pin 5: D in Pin 6: D.pt. Pin 7: comma in Pin 8: comma out Pin 9: GND Pin 10: d.pt out Pin 11: g out Pin 12: f out Pin 13: e out Pin 14: d out Pin 15: c out Pin 16: b out Pin 17: a out Pin 18: Vcc
Spike protector/voltage/temp/overload IC, (whatever that means!).
Pin 1: Relay driver Pin 2: GND Pin 3: Temp detect Pin 4: Audio sig. in Pin 5: AC detect Pin 6: Overload detect Pin 7: Bias Pin 8: Pos feedback
Dual AF PO, 2.3 W, 9 V (4.7 W bidge BTL).
Pin 1: BTL out Pin 2: Out 2 Pin 3: Bootstrap 2 Pin 4,5: Pwr amp GND (tab) Pin 6: Neg feedback 2 Pin 7: In 2 Pin 8: Decoupling Pin 9: Preamp GND Pin 10: In 1 Pin 11: Neg feedback 1 Pin 12,13: Pwr amp GND (tab) Pin 14: Bootstrap 1 Pin 15: Out 1 Pin 16: Vcc
Quad op-amp.
Pin 1: Out 1 Pin 2: -In 1 Pin 3: +In 1 Pin 4: +V Pin 5: +In 2 Pin 6: -In 2 Pin 7: Out 2 Pin 8: Out 3 Pin 9: -In 3 Pin 10: +In 3 Pin 11: -V (or GND for some) Pin 12: +In 4 Pin 13: -In 4 Pin 14: Out 4
TV Vertical Deflection, typical Vcc = 24 V.
Pin 1: NC Pin 2: NC Pin 3: GND Pin 4: Vertical output Pin 5: Vertical output stage Vcc Pin 6: Input Pin 7: Osc Pin 8: 24 V Vcc Pin 9: Pump up output Pin 10 NC
TV vertical deflection, Vcc1 = 12 V, Vcc8 = 24 V, 12 pin SIP.
Pin 1: +Vcc1 Pin 2: Vert Trig In Pin 3: Time Constant Pin 4: Vert Amp Control Pin 5: Vert Size Control Pin 6: Ramp Generator Pin 7: Vert Output AC/DC Feedback Pin 8: +Vcc8 Pin 9: Pump-Up Out Pin 10: Osc Stop Pin 11: Ground Pin 12: Vert Out Pin 13: Power Supply for Vert Out
Dual Regulator, 14 pin dip.
Pin 1: +Boost Pin 2: NC Pin 3: +Vin Pin 4: -Vin Pin 5: -Current Limit Pin 6: -Sense Pin 7: -Vout Pin 8: -Boost Pin 9: NC Pin 10: Reference Pin 11: GND Pin 12: NC Pin 13: +Current Limit Pin 14: +Sense
Sync separator.
Pin 1: Composite Sync (out) Pin 2: Composite Video (in) Pin 3: VSync (out) Pin 4: GND Pin 5: Burst/Back Porch (out) Pin 6: Reset Pin 7: Odd/Even (hi/lo) (out) Pin 8: Vcc
VCR loading/bi-directional motor driver.
(From: Deon Maree (edm@pixie.co.za) I think the M54544L is the same as the M54543L)
Pin 1: Vcc Pin 2: Driver Vcc Pin 3: Output 2 Pin 4: Input 1 Pin 5: Ground Pin 6: Input 2 Pin 7: Output 1 Pin 8: Driver Vcc Pin 9: Vcc
Switching power regulator.
Pin 1: Voltage Feedback Pin 2: Switch Output Pin 3: Gnd - Heatsink Pin 4: Pwr Input Pin 5: Compensation
AF Power Amp, 50 W, Vcc = 36 V.
Pin 1: Input pos(+) Pin 2: Vcc neg(-) Pin 3: Output Pin 4: NC Pin 5: NC Pin 6: NC Pin 7: NC Pin 8: Output Pin 9: Vcc pos(+) Pin 10: Input neg(-)
20 W Audio Amp.
Pin 1 - -Vcc Pin 2 - Out Pin 3 - +Vcc Pin 4 - Bootstrap Pin 5 - NC Pin 6 - NC Pin 7 - FB Pin 8 - In Pin 9 - Gnd Pin 10 - NC
Audio Power Amp, 6 W, 8 ohms, Vcc = +/- 13.2 V, 18 pin SIP.
See the section: "STK4191II - ECG1317" for pinout.
Audio Power Amp, 20 W, 8 ohms, Vcc = +/- 22 V, 18 pin SIP.
See the section: "STK4191II - ECG1317" for pinout.
Audio Power Amp, 25 W, 8 ohms, Vcc = +/- 26 V, 18 pin SIP.
See the section: "STK4191II - ECG1317" for pinout.
Audio Power Amp, 30 W, 8 ohms, Vcc = +/- 27.5 V, 18 pin SIP.
See the section: "STK4191II - ECG1317" for pinout.
Audio Power Amp, 35 W, 8 ohms, Vcc = +/- 30 V, 18 pin SIP.
See the section: "STK4191II - ECG1317" for pinout.
Audio Power Amp, 50 W, 8 ohms, Vcc = +/- 35 V, 18 pin SIP.
See the section: "STK4191II - ECG1317" for pinout.
Audio Power Amp, 50 W, 8 ohms, Vcc = +/- 35.5 V, 18 pin SIP.
Pin 1: Left channel input (-) Pin 2: Left channel input (+) Pin 3: Compensation Pin 4: Compensation Pin 5: Compensation Pin 6: Muting Pin 7: Compensation Pin 8: Compensation Pin 9: -Vcc Pin 10: Left channel Output Pin 11: +Vcc Pin 12: Bypass Pin 13: Right channel output Pin 14: -Vcc Pin 15: Compensation Pin 16: Gnd Pin 17: Right channel input (+) Pin 18: Right channel input (-)
Hybrid TV Voltage Regulator, 123 V, 1 A.
See the section: "STR381 - ECG1546" for pinout.
Hybrid TV Voltage Regulator, 127 V, 1 A.
See the section: "STR381 - ECG1546" for pinout.
Hybrid TV Voltage Regulator, 130 V, 1 A. TO3 3 pin.
Pin 1: +DC Input Pin 2: Output Pin 3: Common Pin 4: Base
Bottom view:
Common
3 o
4 o o 2
Base Output
Case is input - probably about 160 V. Base is probably nearly the same as output.
Hybrid TV Voltage Regulator, 115 V, 1 A. 5 pin SIP.
See the section: "STR30135 - ECG1778" for pinout.
Hybrid TV Voltage Regulator, 120 V, 1 A. 5 pin SIP.
See the section: "STR30135 - ECG1778" for pinout.
Hybrid TV Voltage Regulator, 123 V, 1 A. 5 pin SIP.
See the section: "STR30135 - ECG1778" for pinout.
Hybrid TV Voltage Regulator, 125 V, 1 A. 5 pin SIP.
See the section: "STR30135 - ECG1778" for pinout.
Hybrid TV Voltage Regulator, 130 V, 1 A. 5 pin SIP.
See the section: "STR30135 - ECG1778" for pinout.
Hybrid TV Voltage Regulator, 135 V, 1 A. 5 pin SIP.
Pin 1: Common Pin 2: Base Pin 3: +DC Input Pin 4: Output Pin 5: NC
Audio Preamp.
Pin 1: Preamp Res Pin 2: Input Pin 3: Feedback Pin 4: Gnd Pin 5: Bypass Pin 6: Output Pin 7: Vcc
AF Power Output, 2 Channel, 2 W/channel, 14 pin DIP-W, Vcc = 14 V typical:
Pin 1: Decoupling Pin 2: Decoupling Pin 3: Ch 2 in Pin 4: Feedback Ch 2 Pin 5: Phase compensation Pin 6: Phase compensation Pin 7: Ch 2 out Pin 8: Vcc Pin 8: Ch 1 out Pin 10: Phase compensation Pin 11: Phase compensation Pin 12: Feedback Ch 1 Pin 13: Ch 1 in Pin 14: GND
AF Power Output, 4.2 W, 10 pin SIP HS, Vcc 12.5 V typical.
Pin 1: GND Pin 2: AF out Pin 3: Vcc Pin 4: Bypass Pin 5: Feedback Pin 6: Feedback Pin 7: Bypass Pin 8: Feedback Pin 8: Input bypass Pin 10: AF input
AF PO 5.8 W. 10 pin SIP-HS.
Pin 1: Vcc Pin 2: Ripple reject Pin 3: Muting control Pin 4: AF signal input Pin 5: FB filter Pin 6: Gain adjust Pin 7: GND Pin 8: GND Pin 9: AF output Pin 10: Bootstrap
VCR loading/Bidirectional motor driver, 1 A. Vcc = 18 V (typical).
I would expect the normal output voltage to be close to whatever you have for Vcc (just a guess).
Pin 1: In 1 Pin 2: In 2 Pin 3: Out 1 Pin 4: Ground Pin 5: Out 2 Pin 6: Ve Pin 7: Vcc
Bidirectional motor driver.
Pin 1: In 1 Pin 2: Vcc Pin 3: Out 2 Pin 4: NC Pin 5: GND Pin 6: Vs Pin 7: Out 1 Pin 8: Vref Pin 9: In 1
Not sure if the second (or first) In1 is a typo - this is from ECG7043.
AP PO, .5 W, 8 ohms, Vcc = 6 V (typical), 9 pin SIP.
Pin 1: Hi Freq Comp Pin 2: Input Pin 3: Feedback Pin 4: Hi Freq Comp Pin 5: GND Pin 6: Out Pin 7: Vcc Pin 8: Bootstrap Pin 9: Ripple Filter
Speaker protection IC:
Pin 1: Power on-off detection/Over current detection (typical voltage -0.6V) Pin 2: Direct voltage detection input (Typical voltage 0V) Pin 3: Gnd Pin 4: Gnd Pin 5: Substrate (Typical voltage -0.8V) Pin 6: Relay drive output/Typical voltage low 0.9v Pin 7: Gnd Pin 8: Muting circuit/Typical voltage 2.8v Pin 9: Regulator input/Typical voltage 2.8v
This IC senses over current or a DC offset on the output to the speakers. In the event of a offset it will operate a relay to remove any connection between the amp and speakers so to prevent DC flowing through the speakers and damage them.
Quad op-amp.
Pin 1: Out 1 Pin 2: -In 1 Pin 3: +In 1 Pin 4: +Vcc Pin 5: +In 2 Pin 6: -In 2 Pin 7: Out 2 Pin 8: Out 3 Pin 9: -In 3 Pin 10: +In 3 Pin 11: . (I assume -Vcc or Ground?) Pin 12: +In 4 Pin 13: -In 4 Pin 14: Out 4
2.1 W Audio Amp, 15 V Vs max. Rl = 8 ohms. 14 pin DIP.
Pin 1: Bootstrap Pin 2: NC Pin 3: Frequency Compensation Pin 4: Frequency Compensation Pin 5: Feedback Pin 6: NC Pin 7: Input Pin 8: Ground Pin 9: NC Pin 10: Ground Pin 11: NC Pin 12: Output Pin 13: NC Pin 14: Vs
Coded locking circuit for security systems.
(From: Paul Grohe (grohe@galaxy.nsc.com)).
Vs 7V max, Is 1.8-3.2 mA, 8 V zener across supply pins!!!
Pin 1: Gnd Pin 2: Cosc Ocsillator capacior to Vp ~1nF Pin 3: S2 Output 2 Open collector, active low Pin 4: S1 Output 1 " Pin 5: E10 Pin 6: E9 Pin 7: E8 Pin 8: E7 Pin 9: E6 Pin 10: E5 Pin 11: E4 Pin 12: E3 Pin 13: E2 Pin 14: E1 Pin 15: DATA Data input Pin 16: Vp Pos. supply
Encoder: Pin 15 to Vp, Output: tie pins 3&4 together, this is your output, open collector. E1-E10 set code (connect to either Vp or gnd). Key V+ to transmit.
Decoder, pin 15 to Vp, E1-E10 set code, pins 3&4 open collector outputs active when code matches. Third unsucessfull try disables input! (three strikes and your out!)
Illegal codes are E1-E10=High or E1-E9=High with E10=low.
TV Vertical deflection system IC.
Pin 1: Ramp Out Pin 2: Vcc Pin 3: Flyback Tab 1: Gnd Pin 4: Amp Out Pin 5: Vs Pin 6: Vreg Out Pin 7: Height Adj Pin 8: Sync in Pin 9: Osc. Tab 2: Gnd Pin 10: Amp Im Pin 11: Comp Pin 12: Ramp Gen
TV vertical deflection output, 35 V max Vs, 15 pin SIP-HS.
Pin 1: Amp output Pin 2: Amp supply Pin 3: Osc Pin 4: Osc Pin 5: Sync in Pin 6: Osc Pin 7: Height adj Pin 8: Gnd Pin 9: Ramp generator Pin 10: Ramp out Pin 11: Amp in + Pin 12: Amp in - Pin 13: Blanking out Pin 14: Vs Pin 15: Flyback
AF PO, 5W, Vcc = 14 V, Rl = 4 ohms.
Pin 1: Out Pin 2: Vcc Pin 3: Bootstrap Pin 4: Threshold Pin 5: Muting Pin 6: Invert In Pin 7: Svr Pin 8: Non-Inverting In Pin 9-16: Ground
10 W AF Power Amp. TO220 5 Pin.
Pin 1: + In Pin 2: - In Pin 3: Gnd Pin 4: Out Pin 5: V+
AF PO 22 W, Vcc = 32 V, Rl = 4 ohms.
Pin 1: -In Pin 2: +In Pin 3: -Vs Pin 4: Out Pin 5: +Vs
Pin 3 connected to case.
Horizontal, Vertical Oscillator, Sync, Driver. Vcc1 = 12 V typical.
Pin 1: Vertical Drive Out Pin 2: Vertical Feedback Pin 3: Vertical Frrequency Adj Pin 4: Vertical Sync Sep Pin 5: Video Input Pin 6: Horizontal Sync Sep Pin 7: Horizontal Sync Sep Pin 8: Slow Phse Det Pin 9: Ground Pin 10: Vcc Pin 11: Horizontal Drive Out Pin 12: Horizontal Flyback Input Pin 13: Mute Out Pin 14: Phase Det. Pin 15: Horizontal Frequency Adjust Pin 16: Start Circuit Stab Pin 17: Sandcastle Out Pin 18: Coincidence Det
Aside from those that have obvious meanings, I do not know what the other signals do.
Chroma Control Circuit.
Pin 1: Red Signal Out Pin 2: Storage Cap Cutoff Green Pin 3: Green Signal Out Pin 4: Storage Cap Cutoff Blue Pin 5: Blue Signal Out Pin 6: Vcc Pin 7: Storage Cap Blue Pin 8: Storage Cap Green Pin 9: Storage Cap Red Pin 10: Sandcastle Pules In Pin 11: Signal Switch In Pin 12: B Signal In Pin 13: G Signal In Pin 14: R Signal In Pin 15: Y Signal In Pin 16: Sat Control Voltage Pin 17: R-Y In Pin 18: B-Y In Pin 19: Contrast Control Voltage In Pin 20: Brightness Control Voltage In Pin 21: White Point Adjust Blue Pin 22: White Point Adjust Green Pin 23: White Point Adjust Red Pin 24: GND Pin 25: Beam Current Control In Pin 26: Auto Cutoff Control In Pin 27: Storage Cap Leakage Current Pin 28: Storage Cap Cutoff Red
Video-If-Amplifier for color and monochrome television receiver. Manufactured by Telefunken electronics. Vs = 10 to 15 V.
Pin 1: Input Pin 2: NC Pin 3: Gnd Pin 4: Decoupling (connect to an electrolitic capacitor). Pin 5: To Tuner Pin 6: Tuner control Pin 7: Gating pulse Pin 8,9: 38.9 MHz tank Pin 10: NC Pin 11: Negative video output Pin 12: Positive Video output Pin 13: Vs Pin 14: NC Pin 15: Gnd Pin 16: Input
Multistandard Color Convertor.
Pin 1: (R-Y) Out Pin 2: SECAM (R-Y) De-emph Pin 3: (B-Y) Out Pin 4: SECAM (B-Y) Ref In Pin 5: SECAM (B-Y) Ref Out Pin 6: SECAM (B-Y) De-emph Pin 7: SECAM (R-Y) Ref Out Pin 8: SECAM (R-Y) Ref In Pin 9: GND Pin 10: Delay Chroma Signal In Pin 11: DC Ref Delay Line Pin 12: Out Chroma S/D Line Pin 13: Vcc Pin 14: Work PT Con Chroma Amp Pin 15: Chroma Signal In Pin 16: ACC Pin 17: Hue Control/Service Switch Pin 18: Phase Control Osc Pin 19: Crystal for Osc Pin 20: NTSC ID Pin 21: PAL/SECAM ID Pin 22: SECAM ID Ref Pin 23: SECAM ID Sel Pin 24: Sandcastle In Pin 25: Switch Voltage In/Out NTSC 4.4 Pin 26: Switch Voltage In/Out NTSC 3.5 Pin 27: Switch Voltage In/Out SECAM Pin 28: Switch Voltage In/Out PAL
7 Input Darlington Driver 500mA
ULN 2003A - ECG2013:
-------------------
7 Input Darlington Driver 500mA
Pin 1: In 1
Pin 2: In 2
Pin 3: In 3
Pin 4: In 4
Pin 5: In 5
Pin 6: In 6
Pin 7: In 7
Pin 8: Gnd
Pin 9: Common connection point for the cathodes of the internal free
wheeling diodes connected to each driver output.
Pin 10: Out 7
Pin 11: Out 6
Pin 12: Out 5
Pin 13: Out 4
Pin 14: Out 3
Pin 15: Out 2
Pin 16: Out 1
Pin 1: Decoupling Pin 2: Power Ground Pin 3: Signal Ground Pin 4: Output Pin 5: Vcc Pin 6: N/C Pin 7: N/C Pin 8: Input
Pin 1: Non-inverting input Pin 2: Inverting input Pin 3: Substrate/-Vs Pin 4: Output Pin 5: +Vs
5 Input Darlington Driver, 500mA.
Pin 1: NC Pin 2: In 1 Pin 3: In 2 Pin 4: In 3 Pin 5: In 4 Pin 6: In 5 Pin 7: Gnd Pin 8: NC Pin 9: Out 5 Pin 10: Out 4 Pin 11: Out 3 Pin 12: Out 2 Pin 13: Out 1 Pin 14: NC