Brand: SONY
Category: TV
Document Type: Parts/Service
Language: EN
Parts/Service for KV-27S42
Uploaded: Nov. 21, 2025, 6:18 p.m.
Manual Publish Date: 1999-04
The manual details the service procedures for the SONY BA-4D CHASSIS TV models. It covers warnings and cautions, disassembly, set-up adjustments, safety-related adjustments, circuit adjustments, diagrams, exploded views, and electrical parts lists. Specific sections include self-diagnostic functions, safety check-out procedures, and various connection guides for external equipment like VCRs and satellite receivers.
Troubleshooting and error codes
| Diagnostic Item Description | No. of times STANDBY/TIMER lamp flashes | Display/ Diagnostic result | Probable Cause Location | Detected Symptoms |
|---|---|---|---|---|
| Power does not turn on | Does not light | * Power cord is not plugged in. * Fuse is burned out (F5050) (E Board) |
* Power does not come on. * No power is supplied to the TV. AC power supply is faulty. |
|
| +B overcurrent (OCP) | 2 times | 2:0 or 2:1 | * H.OUT (Q502) is shorted. (A board) * IC1751 is shorted. (C board) * IC1701 is shorted. (CV board) |
* Power does not come on. * Load on power line is shorted. |
| Vertical deflection stopped* | 4 times | 4:0 or 4:1 | * +13V is not supplied. (A board) * IC 541 is faulty (A board) |
* Has entered standby state after horizontal raster. * Vertical deflection pulse is stopped. * Power line is shorted or power supply is stopped. |
| White balance failure (not balanced) | 5 times | 5:0 or 5:1 | * Video OUT (Q306 to 308) is faulty.(A bd) * IC301 is faulty. (A board) ** G2 is improperly adjusted. |
* No raster is generated. * CRT cathode current detection reference pulse output is small. |