Documented Tap Points On VCRs - harrypm/vhs-decode GitHub Wiki

The Complete List of Confirmed VCR RF Tap Points

This list is a work in progress based on service manuals and direct user experiences.

Look for RF Y, RF C, RF Y+C, PB, V RF, V ENV, ENV, ENVELOPE, VIDEO ENVE, VIDEO ENVELOPE to find your VCR RF tap locations points if your VCR was serviced likely there is pen marker on the board at these locations.

Panasonic NV-HS950B:

Should apply to most K-Deck variant VCR'S AG1980 NV-HS1000 etc, notes that tap points 01/02 might need further amplification if the cable run is over 30cm etc.

NOTE! The head amplification board may have cracked solder joints even if serviced shielding should be removed for inspection & properly reflowed with flux and 99% Isopropnal brushing clean the area.

  1. Head Amplifier Board (Green Connector) Pin 10 Direct RF C (Tested Working VHS issues with SVHS) (Pin 11 does not work)

  2. Head Amplifier Board (Green Connector) Pin 16 Direct Audio RF

Requires an capacitor in-line for SVHS RF captures on direct taps.

  1. Test Point TL3001 RF C (VIDEO ENVE) Requires 10uf cap. (VHS/SVHS Work)

  2. Test Point TP2001 RF Head Switching (H.SW)

  3. Test Point TL30007 RF Y

  4. Test Point TL30008 RF Y+C

  5. Test Point TW4S02 HIFI Audio Tap (Left Side)

CVBS/S-Video Outputs:

  1. Test Point TP3002 Composite JK4 Output (Back of VCR)

  2. Test Point TP3021 S-Video Pin-3 & TPCOUT Pin-4 (Back of VCR)

Panasonic AG5700

  1. TP3301 ENV Test point on top of main pcb (which is RF C from head amp via 0.01 uf capacitor) - tested ok with DDD

  2. todo: hi-fi

SANYO VHR-VT221A / NZ (Made by Orion?)

  1. TP4002 Video Envelope

  2. TP4001 Head Switching Pulse

Samsung made VCR Range late 90s and on (including early 2000s and later Sony)

Test points on Samsun SV-6213 with mechanical mechanism removed

Test points are typically wires with a hole underneath on the left side of the mechanism.

With the Domesday duplicator at least, it seems the test point ground doesn't work very well. So far I got the best result by connecting to the vcr mechanism chassis rather than the test point ground and putting a 0.1 uf film capacitor between the env wire and wire for capturing. May still need some more adjustments to work optimally but not sure.

  1. TP301 ENV - Video RF

  2. TP302 A-Out Audio RF

  3. TP303 V-Out Composite Video

  4. TP602 HD SW - Head Switching Signal

  5. TP601 CTL - Control Track Signals

  6. W022 GND - Grounding

Notes

For the PAL side at least, some of these seem a bit prone to bad power supply capacitors causing issues turning on (or in some cases image disturbance on normal playback)

Sony late 90s/early 2000s

![](assets/images/vhs/Sony_Vcr_Test_Point.jpg|SLV SE60 test points)

Test points on connector with shielding around it behind head drum (CN262)

  1. PB RF - video RF
  2. RF SWP - Head switching signal
  3. GND - Ground
  4. CTL - Control track signal
  5. AV ADJ - Pin used to activate head switch point adjustment

Separate 2-pin connector for FM audio right of mechanism (CN341 on SLV-SE60 and similar, C362 on SLV-SE800 and related, may be different on others)

  1. GND
  2. HF ADJ - Audio FM (Needs test)

Samsung SV-DVD (1E) line (DVD/VHS Combo Decks)

They have a dedicated header of test points called TP01

  1. V. Out - Composite Video
  2. A. Out - HIFI RF
  3. V. ENV - Video RF
  4. H' D SW - Head Switching Signals
  5. CTL - Control Signals
  6. GND - Ground Pin

Bush VCR925NSIL

Test Point's are Left hand side bar style next to TV pack.

  1. HIFI - HIFI RF
  2. H.SW - Head Switching Signals
  3. V. ENV - Video RF (Needed an cap used 100uf)
  4. Service (Unknown Need to Check Service Manual)

Deck With mechanical and Fused IEC14 & BNC Bulkhead Mods

JVC HR-S9800U

  1. A.FM
  2. PB.FM

Thomson vp-4650

pal/secam/ntscthomson vp-4650

  1. PB_YC (PB On Board Lable)

Notes

For PAL models, it seems these often have some capacitors in the power supply go bad, which can cause interference on image on normal playback, and failure to turn on depending on which ones are bad.