Good scan of the original service manual. All schematics and adjustment procedures are there. It helped me to fix a long lasting problem with the tracking circuitry. The manual also includes the supplementals 1,2 and 3. Included are; electrical schematic's , pcb layout's, mechanical drawing's and exploded views, disassembly manual and maintenance procedures. 236 pages.
Excellent copies.
I will use "Owner Manual" again a second time.
Text excerpt from page 12 (click to view)
IC BLOCK DIAGRAM & DESCRIPTION
IC201 IR3Y31M(VIDEO PROCESSING) (
)
Voltage 2.0V Description Connected to TRAP. Outputs video signal for sync separator Circuit. 2.25V Input composite video signal. (Inputs luminance signal in the case of Y/C input).
Term. No. 1. 2. 3.
Term. Name TRAP H FILTER OUT VIDEO IN
4. 5.
IDENT FILTER C IN 2.5V
Connected to the IDENT detector filter. Input the chrominance signal in the case of Y/C input. When this terminal Is connected to ground. The composite Video signal input is accepted.
6. 7.
COLOR SW
The DC voltage applied to this terminal Adjusts the color gain. The input terminal for the source selection signal. Give the " Low "level in Case of the VIDEO IN inputs, and give The " High" EXT RGB IN inputs.
8. 9. 10.
KILLER FILTER PEAK LIMITER RGB AMPLITUDE 0.7V
Connected to the killer detector Filter. The DC voltage applied to this terminal Adjusts the white limit level. Adjusts the amplitude between the Inverted level and the non ~inverted level of the R.G. B. outputs. This terminal is preset inside the IC. Do not Lower the DC voltage under 0.7V.
11. 12.
ACC FILTER R-Y/B-Y PHASE
Connected to the ACC. Detector filter. Adjusts the angle of the E-Y/B-Y in Case of the PAL mode. Connect to VCC1 for NTSC mode.
13.
TINT
The voltage applied to this terminal Adjusts the tint. Corrects the color of output amplitude Every 1H in case of the PAL mode.
- 10 -
